Note: Descriptions are shown in the official language in which they were submitted.
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1
AEROSOL GENERATING COMPOSITION COMPRISING NICOTINE AND ACID
OR NICOTINE SALT
Priority Claim
The present application claims priority from US Provisional Application No.
63/193,877, filed May 27, 2021, which is hereby fully incorporated herein by
reference.
Technical Field
The present invention relates to aerosol-generating compositions comprising
an aerosol-generating material; consumables for use within a non-combustible
aerosol provision system, the consumables comprising the aerosol-generating
composition; and non-combustible aerosol provision systems.
Background
Smoking articles such as cigarettes, cigars and the like burn tobacco during
use to create tobacco smoke. Alternatives to these types of articles release
an
inhalable aerosol or vapour by releasing compounds from a substrate material
by
heating without burning. These may be referred to as non-combustible smoking
articles, aerosol generating assemblies or non-combustible aerosol provision
systems.
One example of such a product is a heating device which release compounds
by heating, but not burning, a solid aerosolisable material. This solid
aerosolisable
material may, in some cases, contain a tobacco material. The heating
volatilises at
least one component of the material, typically forming an inhalable aerosol.
These
products may be referred to as heat-not-burn devices, tobacco heating devices
or
tobacco heating products (THP). Various different arrangements for
volatilising at
least one component of the solid aerosolisable material are known.
As another example, there are e-cigarette / tobacco heating product hybrid
devices, also known as electronic tobacco hybrid devices. These hybrid devices
contain a liquid source (which may or may not contain nicotine) which is
vaporised
by heating to produce an inhalable vapour or aerosol. The device additionally
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contains a solid aerosolisable material (which may or may not contain a
tobacco
material) and components of this material are entrained in the inhalable
vapour or
aerosol to produce the inhaled medium.
Summary of the Disclosure
According to a first aspect of the present invention, there is provided an
aerosol-generating composition comprising an aerosol-generating material,
wherein
the aerosol-generating material comprises:
- about 1 to about 30 wt% nicotine;
- about 15 to about 80 wt% gelling agent;
- about 10 to about 60 wt% aerosol-former material;
- about 1 to about 30 wt% acid; and
- optionally filler,
wherein the wt% values are calculated on a dry weight basis; and
wherein the molar ratio of nicotine to acid is 2.2:1 or less.
According to a further aspect of the present invention, there is provided an
aerosol-generating composition comprising an aerosol-generating material,
wherein
the aerosol-generating material comprises:
- about 5 to about 30 wt% nicotine salt;
- about 15 to about 80 wt% gelling agent;
- about 10 to about 60 wt% aerosol-former material; and
- optionally filler,
wherein the wt% values are calculated on a dry weight basis.
According to a further aspect of the present invention, there is provided an
aerosol-generating composition comprising an aerosol-generating material,
wherein
the aerosol-generating material comprises:
- about 1 to about 30 wt% nicotine salt;
- about 45 to about 80 wt% gelling agent;
- about 10 to about 54 wt% aerosol-former material; and
- optionally filler,
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wherein the wt% values are calculated on a dry weight basis.
According to a further aspect of the present invention, there is provided a
consumable for use within a non-combustible aerosol provision system, the
consumable comprising the aerosol-generating composition as defined herein.
According to a further aspect of the present invention, there is provided a
non-combustible aerosol provision system comprising the consumable as defined
herein and a non-combustible aerosol provision device, the non-combustible
aerosol
provision device comprising an aerosol-generation device arranged to generate
aerosol from the consumable when the consumable is used with the non-
combustible
aerosol provision device.
Further aspects of the invention described herein may provide the use of the
aerosol-generating material, the aerosol-generating composition, the
consumable or
the non-combustible aerosol provision system, in the generation of an
inhalable
aerosol.
According to a further aspect of the present invention, there is provided a
method of making an aerosol-generating composition as described herein.
Further features and advantages of the invention will become apparent from the
following description of preferred embodiments of the invention, given by way
of
example only, which is made with reference to the accompanying figures.
Brief Description of the Figures
Figure 1 shows a section view of an example of a consumable.
Figure 2 shows a perspective view of the article of Figure 1.
Figure 3 shows a sectional elevation of an example of a consumable.
Figure 4 shows a perspective view of the article of Figure 3.
Figure 5 shows a perspective view of an example of a non-combustible aerosol
provision system.
Figure 6 shows a section view of an example of a non-combustible aerosol
provision
system.
Figure 7 shows a perspective view of an example of a non-combustible aerosol
provision system.
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Detailed Description
The aerosol-generating compositions described herein are compositions that
are capable of generating aerosol, for example when heated, irradiated or
energized
in any other way. The aerosol-generating composition may, for example, be in
the
form of a solid, liquid or gel which contain nicotine. The aerosol-generating
material
may be an "amorphous solid". In some embodiments, the amorphous solid is a
"monolithic solid-. The aerosol-generating material may be non-fibrous or
fibrous.
In some embodiments, the aerosol-generating material may be a dried gel. The
aerosol-generating material may be a solid material that may retain some
fluid, such
as liquid, within it. In some embodiments the retained fluid may be water
(such as
water absorbed from the surroundings of the aerosol-generating material) or
the
retained fluid may be solvent (such as when the aerosol-generating material is
formed from a slurry). In some embodiments, the solvent may be water. In some
embodiments, the aerosol-generating composition may for example comprise from
about 50wt%, 60wt% or 70wt% of aerosol-generating material, to about 90wt%,
95wt% or 100wt% of aerosol-generating material. These wt% values are
calculated
on a wet weight basis (WWB), i.e. including any water or other solvent present
in
the aerosol-generating composition or aerosol-generating material. In some
cases,
the aerosol-generating composition consists of aerosol-generating material.
As described hereinabove, the invention provides an aerosol-generating
composition comprising (or consisting of) an aerosol-generating material,
wherein
the aerosol-generating material comprises:
- about 1 to about 30 wt% nicotine;
- about 15 to about 80 wt% gelling agent;
- about 10 to about 60 wt% aerosol-former material;
- about 1 to about 30 wt.% acid; and
- optionally filler,
wherein the wt% values are calculated on a dry weight basis; and
wherein the molar ratio of nicotine to acid is 2.2:1 or less.
Also provided is an aerosol-generating composition comprising (or
consisting of) an aerosol-generating material, wherein the aerosol-generating
material comprises:
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- about 5 to about 30 wt% nicotine salt;
- about 15 to about 80 wt% gelling agent;
- about 10 to about 60 wt.% aerosol-former material; and
- optionally filler,
5 wherein the wt% values are calculated on a dry weight basis.
Also provided is an aerosol-generating composition comprising (or
consisting of) an aerosol-generating material, wherein the aerosol-generating
material comprises:
- about 1 to about 30 wt% nicotine salt;
- 45 to about 80 wt% gelling agent;
- about 10 to about 54 wt% aerosol-former material; and
- optionally filler,
wherein the wt% values are calculated on a dry weight basis.
The presence of either an acid or a nicotine salt in the aerosol-generating
material may improve the sensory attributes of the aerosol by reducing the
harshness. When present, the acid protonates the nicotine to form a nicotine
salt in
situ, either in the material or in the aerosol once it is formed. The presence
of the
nicotine salt results in an aerosol which some users find more satisfying.
In some embodiments, the aerosol-generating material and/or the aerosol-
generating composition consists essentially of, or consists of, gelling agent;
solvent;
aerosol-former material; nicotine; acid; and optionally a flavour and/or
optionally an
additional active substance and/or optionally filler.
In some embodiments, the aerosol-generating material and/or the aerosol-
generating composition consists essentially of, or consists of, gelling agent;
solvent;
aerosol-former material; nicotine; acid; and optionally a flavour and/or
optionally
filler.
In some cases, the aerosol-generating material and/or the aerosol-generating
composition consists essentially of, or consists of, gelling agent; solvent;
aerosol-
former material; nicotine; acid; and a flavour.
In some cases, the aerosol-generating material and/or the aerosol-generating
composition consists essentially of, or consists of, gelling agent; solvent;
aerosol-
former material; nicotine and acid.
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In some embodiments, the aerosol-generating material and/or the aerosol-
generating composition consists essentially of, or consists of, gelling agent;
solvent;
aerosol-former material; nicotine salt; and optionally a flavour and/or
optionally an
additional active substance and/or optionally filler.
In some embodiments, the aerosol-generating material and/or the aerosol-
generating composition consists essentially of, or consists of, gelling agent;
solvent;
aerosol-former material; nicotine salt; and optionally a flavour and/or
optionally
filler.
In some cases, the aerosol-generating material and/or the aerosol-generating
composition consists essentially of, or consists of, gelling agent; solvent;
aerosol-
former material; nicotine salt; and a flavour.
In some cases, the aerosol-generating material and/or the aerosol-generating
composition consists essentially of, or consists of, gelling agent; solvent;
aerosol-
former material and nicotine salt.
In each case, the solvent may be water. In some embodiments, the aerosol-
generating material is a hydrogel and may comprise less than about 20 wt% of
water
calculated on a wet weight basis. In some cases, the hydrogel may comprise
less
than about 15 wt%, 12 wt% or 10 wt% of water calculated on a wet weight basis
(WWB). In some cases, the hydrogel may comprise at least about 1 wt%. 2 wt% or
at least about 5 wt% of water (WWB). Suitably, the water content of the
aerosol-
generating material may be from about 5wt%, 7wt% or 9wt% to about 15wt%.
13wt% or llwt% (WWB), such as 5-15 wt%, 7-13 wt% or 9-11 wt% (WWB). The
water content of the aerosol-generating material may, for example, be
determined by
Karl-Fischer-titration or Gas Chromatography with Thermal Conductivity
Detector
(GC-TCD).
Aerosol-former material
The aerosol-generating material may comprise one or more constituents
capable of forming an aerosol.
Suitably, the aerosol-generating material may comprise about 10 wt% to
about 60 wt% of aerosol-former material (calculated on a dry weight basis),
for
example about 20 wt%, 25 wt% or 30 wt% to about 50 wt% or 55 wt%. In
exemplary embodiments, the aerosol-generating material comprises about 15 to
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about 60 wt% of aerosol-former material (calculated on a dry weight basis). In
other
exemplary embodiments, the aerosol-generating material comprises about 15-54
wt%, 20-50 wt%, 25-50 wt% or 30-50 wt% of an aerosol-former material.
In some embodiments, the aerosol-former material may comprise one or more
of glycerol, propylene glycol, diethylene glycol, triethylene glycol,
tetraethylene
glycol, 1,3-butylene glycol, erythritol. meso-Erythritol, ethyl vanillate,
ethyl laurate,
a diethyl suberate, triethyl citrate, triacetin, a diacetin mixture, benzyl
benzoate,
benzyl phenyl acetate, tributyrin, lauryl acetate, lauric acid, myristic acid,
and
propylene carbonate.
In some embodiments, the aerosol former material comprises one or more
polyhydric alcohols, such as glycerol, propylene glycol, triethylene glycol,
1,3-
butanediol and glycerin; esters of polyhydric alcohols, such as glycerol mono-
, di- or
triacetate; and/or aliphatic esters of mono-, di- or polycarboxylic acids,
such as
dimethyl dodecanedioate and dimethyl tetradecanedioate.
In some cases, the aerosol-former material comprises, consists essentially of
or consists of glycerol and/or propylene glycol.
In some embodiments, the aerosol-former material comprises a mixture of
glycerol and propylene glycol in a weight ratio of glycerol to propylene
glycol of
about 3:1 to 1:3, about 2:1 to 1:2, about 1.5:1 to 1:1.5, about 55:45 to
45:55, or
about 45:55.
In some cases, the aerosol-former material comprises, consists essentially of
or consists of glycerol.
Gelling agent
Suitably, the aerosol-generating material comprises about 15 wt% to about
80 wt% gelling agent, for example from about 20 wt%, 25 wt%, 30 wt%, 40 wt% or
45 wt% to about 65 wt%, 70 wt.% or 75 wt.% (all calculated on a dry weight
basis).
In exemplary embodiments, the aerosol-generating material comprises about 20-
80
wt%, 35-80 wt%, 45-80 wt%, 40-70 wt% or 45-70 wt% gelling agent.
In some embodiments, the gelling agent comprises a hydrocolloid.
In some embodiments, the gelling agent comprises (or is) one or more
compounds selected from polysaccharide gelling agents, such as alginate,
pectin,
starch or a derivative thereof, cellulose or a derivative thereof, pullulan,
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carrageenan, agar and agarose; gelatin; gums, such as xanthan gum, guar gum
and
acacia gum; silica or silicone compounds, such as PDMS and sodium silicate;
clays,
such as kaolin; and polyvinyl alcohol.
In some embodiments, the gelling agent comprises (or is) one or more
polysaccharide gelling agents.
In some embodiments, the polysaccharide gelling agent is selected from
alginate, pectin, starch or a derivative thereof, cellulose or a derivative
thereof, and
combinations thereof.
In some embodiments, the polysaccharide gelling agent is selected from
alginate, a cellulose derivative and combinations thereof.
In some embodiments, the gelling agent is a polysaccharide gelling agent,
optionally wherein the polysaccharide gelling agent is selected from alginate,
a
cellulose derivative, and combinations thereof.
In some embodiments, the alginate is sodium alginate.
In some embodiments, the polysaccharide gelling agent is a cellulose
derivative.
In some embodiments, the polysaccharide gelling agent is alginate.
In some embodiments the gelling agent is not crosslinked. The absence of
crosslinks in the gelling agent facilitates quicker delivery of the
constituent,
derivative or extract of cannabis (and any optional additional active
substances
and/or flavours) from the aerosol-generating material.
Examples of cellulosic gelling agents (also referred to herein as cellulose
derivatives) include, but are not limited to, hydroxymethyl cellulose,
hydroxyethyl
cellulose, hydroxypropyl cellulose, carboxymethyleellulose (CMC),
hydroxypropyl
methylcellulose (HPMC), methyl cellulose, ethyl cellulose, cellulose acetate
(CA),
cellulose acetate butyrate (CAB), and cellulose acetate propionate (CAP). In
some
embodiments the cellulose or derivative thereof is selected from hydroxymethyl
cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose,
carboxymethylcellulose
(CMC), hydroxypropyl methylcellulose (HPMC), methyl cellulose, ethyl
cellulose,
cellulose acetate (CA), cellulose acetate butyrate (CAB), and cellulose
acetate
propionate (CAP). In some embodiments, the cellulose derivative is CMC.
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For example, in some embodiments, the gelling agent comprises (or is) one
or more of alginate, pectin, hydroxyethyl cellulose, hydroxypropyl cellulose,
carboxymethylcellulose, pullulan, xanthan gum guar gum, carrageenan, agarose,
acacia gum, fumed silica, PDMS, sodium silicate, kaolin and polyvinyl alcohol.
In some embodiments, the gelling agent comprises (or is) one or more of
hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethylcellulose, guar
gum,
acacia gum, alginate and/or pectin.
In some cases, the gelling agent comprises (or is) alginate and/or pectin, and
may be combined with a crosslinking agent (such as a calcium source) during
formation of the aerosol-generating material. In some cases, the aerosol-
generating
material may comprise a calcium-crosslinked alginate and/or a calcium-
crosslinked
pectin.
In some embodiments, the gelling agent comprises (or is) alginate.
In some embodiments, alginate is the only gelling agent present in the
aerosol-generating material.
In other embodiments, the gelling agent comprises alginate and at least one
further gelling agent, such as pectin.
In particular embodiments, the gelling agent is carboxymethylcellulose.
In some embodiments, CMC is the only gelling agent present in the aerosol-
generating material.
In some embodiments, the aerosol-generating composition comprises a
crosslinking agent. In some cases, the crosslinking agent comprises calcium
ions. In
some cases, the aerosol-generating composition may comprise carboxymethyl
cellulose and a calcium-crosslinked alginate.
In some embodiments, the aerosol-generating composition does not comprise
a crosslinking agent.
Nicotine
In some embodiments, the aerosol-generating material comprises about 1
wt% to about 30 wt% nicotine, for example from about 3 wt% or 5 wt% to about
10
wt%, 15 wt%, 20 wt% or 25 wt% nicotine (all calculated on a dry weight basis).
In
exemplary embodiments, the aerosol-generating material comprises 5-30 wt%, 6-
30
wt%, 1-20 wt%, 1-15 wt%, 1-10 wt% or 2-10 wt% nicotine.
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In some embodiments, the aerosol-generating material comprises about 1
wt% to about 30 wt% acid, for example from about 3 wt% or 5 wt% to about 10
wt%, 15 wt%, 20 wt% or 25 wt% acid (all calculated on a dry weight basis). In
exemplary embodiments, the aerosol-generating material comprises 5-30 wt%, 6-
30
5 wt%, 1-20 wt%, 1-15 wt%, 1-10 wt% or 2-10 wt% acid.
In some embodiments, the acid is an organic acid. In some embodiments, the
acid may be at least one of a monoprotic acid, diprotic acid and a triprotic
acid. In
some embodiments, the acid may contain at least one carboxy functional group.
In
some such embodiments, the acid may be at least one of an alpha-hydroxy acid,
10 carboxylic acid, dicarboxylic acid, tricarboxylic acid and keto acid. In
some such
embodiments, the acid may be an alpha-keto acid.
In some such embodiments, the acid may be at least one of succinic acid,
lactic acid, benzoic acid, citric acid, tartaric acid, fumaric acid, levulinic
acid, acetic
acid, malic acid, formic acid, sorbic acid, benzoic acid, propanoic acid and
pyruvic
acid. In some embodiments, the acid is at least one of lactic acid, benzoic
acid,
levulinic acid and pyruvic acid.
Suitably the acid is benzoic acid. In other embodiments, the acid is lactic
acid. In other embodiments the acid may be an inorganic acid. In some of these
embodiments, the acid may be a mineral acid. In some such embodiments, the
acid
may be at least one of sulphuric acid, hydrochloric acid, boric acid and
phosphoric
acid.
Suitably, the aerosol-generating material comprises nicotine and an acid. In
some embodiments, the molar ratio of nicotine to acid is 2.2:1 or less, 1.5:1
or less
or 1:1 or less.
In some embodiments, the molar ratio of nicotine to acid is 0.5:1 or more,
0.7:1 or more or 0.8:1 or more. In some embodiments, the molar ratio is from
0.5:1
to 2.2:1, 0.7:1 to 2:1 or 0.7:1 to 1.5:1.
In some embodiments, the molar ratio of acid to nicotine is 0.5:1 or more,
0.7:1 or more or 0.8:1 or more. In some embodiments, the molar ratio of acid
to
nicotine is from 0.5:1 to 2.2:1, 0.7:1 to 2:1 or 0.7:1 to 1.5:1.
In some embodiments, the aerosol-generating material comprises about 1
wt% to about 30 wt% nicotine salt, for example from about 3 wt% or 5 wt% to
about
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wt%, 15 wt%, 20 wt% or 25 wt% nicotine salt (all calculated on a dry weight
basis). In exemplary embodiments, the aerosol-generating material comprises 5-
30
wt%, 6-30 wt%, 1-20 wt%, 1-15 wt%, 1-10 wt% or 2-10 wt% nicotine salt.
In some embodiments, the nicotine salt comprises nicotine lactate or nicotine
5 benzoate.
In some embodiments, the nicotine salt comprises, consists essentially of or
consists of nicotine benzoate.
Filler
The aerosol-generating material may further comprise a filler. Use of a filler
10 may help to reduce tackiness of the aerosol-generating material, for
example if high
levels of aerosol-former material are present.
In some embodiments, the aerosol-generating material comprises less than
about 10 wt% of a filler, such as less than about 5 wt% filler (all calculated
on a dry
weight basis). In some embodiments, the aerosol-generating material comprises
from about 1 wt%, 2 wt% or 3 wt% to about 5 wt%, 7 wt% or 10 wt%, such as 1-10
wt%, 2-7 wt% or 3-5 wt%.
In some cases, the aerosol-generating material comprises less than 1 wt% of
a filer.
In some cases, the aerosol-generating material comprises no filler. In some
cases, the aerosol-generating composition comprises no filler.
The filler, if present, may comprise one or more inorganic filler materials,
such as calcium carbonate, perlite, vermiculite, diatomaceous earth, colloidal
silica,
magnesium oxide, magnesium sulphate, magnesium carbonate, and suitable
inorganic sorbents, such as molecular sieves. The filler, if present, may
comprise
one or more organic filler materials such as wood pulp, cellulose and
cellulose
derivatives. In particular cases, aerosol-generating material comprises no
calcium
carbonate such as chalk.
In particular embodiments which include filler, the filler is fibrous. For
example, the filler may be a fibrous organic filler material such as wood
pulp, hemp
fibre, cellulose or cellulose derivatives. In some embodiments, the filler
comprises
wood pulp. Without wishing to be bound by theory, it is believed that
including
fibrous filler in an aerosol-generating material may increase the tensile
strength of
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the material. This may be particularly advantageous in examples wherein the
aerosol-generating material is provided as a sheet, such as when an aerosol-
generating material sheet circumscribes a rod of aerosol-generating
composition.
In some embodiments, the aerosol-generating material may further comprise
one or more other functional material(s).
Additional active substances
In particular embodiments, nicotine or nicotine salt is or are the only
active(s) present in the aerosol-generating material. In particular
embodiments,
nicotine or nicotine salts is or are the only active(s) present in the aerosol-
generating
composition. However, the aerosol-generating material and/or the aerosol-
generating composition may further comprise additional active ingredients
In some cases, the aerosol-generating material may comprise from about 1
wt%, 5 wt%, 10 wt%, 15 wt%, 20 wt% or 25 wt% to about 65 wt%, 50 wt%, 45
wt%, 40 wt%, 35 wt% or 30 wt% (calculated on a dry weight basis) of another
active substance in additional to nicotine or nicotine salt.
The additional active substance as used herein may be a physiologically
active material, which is a material intended to achieve or enhance a
physiological
response. The additional active substance may for example be selected from
nutraceuticals, nootropics and psychoactives. The additional active substance
may
be naturally occurring or synthetically obtained. The additional active
substance
may comprise for example caffeine, taurine, theine, vitamins such as B6 or B12
or
C, melatonin, or constituents, derivatives or combinations thereof. The
additional
active substance may comprise one or more consistuents, derivatives or
extracts of
tobacco or another botanical.
In some embodiments, the additional active substance comprises caffeine,
melatonin or vitamin B12.
In some embodiments, the additional active substance comprises
constituents(s), derivative(s) or extract(s) of cannabis.
In some embodiments, the additional active substance comprises one or more
cannabinoid compounds selected from the group consisting of: cannabidiol
(CBD),
tetrahydrocannabinol (THC), tetrahydrocannabinolic acid (THCA), cannabidiolic
acid (CBDA), cannabinol (CBN), cannabigerol (CB G), cannabichromene (CBC),
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cannabicyclol (CB L), cannabivarin (CBV), tetrahydrocannabivarin (THCV),
cannabidivarin (CBDV), cannabichromevarin (CBCV), cannabigerovarin (CBGV),
cannabigerol monomethyl ether (CBGM) and cannabielsoin (CBE), cannabicitran
(CBT).
The additional active substance may comprise one or more cannabinoid
compounds selected from the group consisting of cannabidiol (CBD) and THC
(tetrahydrocannabinol).
The additional active substance solid may comprise cannabidiol (CBD).
The active substances may comprise nicotine and cannabidiol (CBD).
The active substances may comprise nicotine, cannabidiol (CBD), and THC
(tetrahydrocannabinol).
As noted herein, the additional active substance may comprise or be derived
from one or more botanicals or constituents, derivatives or extracts thereof.
As used
herein, the term "botanical" includes any material derived from plants
including, but
not limited to, extracts, leaves, bark, fibres, stems, roots, seeds, flowers,
fruits,
pollen, husk, shells or the like. Alternatively, the material may comprise an
active
compound naturally existing in a botanical, obtained synthetically. The
material may
be in the form of liquid, gas, solid, powder, dust, crushed particles,
granules, pellets,
shreds, strips, sheets, or the like. Example botanicals are tobacco,
eucalyptus, star
anise, hemp, cocoa, coffee, fennel, lemongrass, peppermint, spearmint,
rooibos,
chamomile, flax, ginger, ginkgo biloba, hazel, hibiscus, laurel, licorice
(liquorice),
matcha, mate, orange skin, papaya, rose, sage, tea such as green tea or black
tea,
thyme, clove, cinnamon, coffee, aniseed (anise), basil, bay leaves, cardamom,
coriander, cumin, nutmeg, oregano, paprika, rosemary, saffron, lavender, lemon
peel, mint, juniper, elderflower, vanilla, wintergreen, beefsteak plant,
curcuma,
turmeric, sandalwood, cilantro, bergamot, orange blossom, myrtle, cassis,
valerian,
pimento, mace, damien, marjoram, olive, lemon balm, lemon basil, chive, carvi,
verbena, tarragon, geranium, mulberry, ginseng, theanine, theacrine, maca,
ashwagandha, damiana, guarana, chlorophyll, baobab or any combination thereof.
The mint may be chosen from the following mint varieties: Mentha Arvenns,
Mentha c. V., Mentha niliaca, Mentha piperita, Mentha pipe hut citrcau c.
v.,Mentha
piperita c.v., Mentha spicata crispa, Mentha cardifolia, Mentha longifolia,
Mentha
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suaveolens variegata, Mentha pule gium, Mentha spicata c. v. and Mentha
suave olens.
In some embodiments, the additional active substance comprises or is
derived from one or more botanicals or constituents, derivatives or extracts
thereof
and the botanical is tobacco.
In some embodiments, the aerosol-generating material is substantially free
from tobacco. By "substantially free from- it is meant that the material
comprises
less than 1 wt%, such as less than 0.5 wt% tobacco. In some embodiments, the
aerosol-generating material is free from tobacco. In some embodiments, the
aerosol-
generating material does not comprise tobacco fibres. In particular
embodiments, the
aerosol-generating material does not comprise fibrous material.
In some embodiments, the additional active substance comprises or derives
from one or more botanicals or constituents, derivatives or extracts thereof
and the
botanical is selected from eucalyptus, star anise, cocoa and hemp. In some
embodiments the additional active substance comprises (or is) a botanical
selected
from eucalyptus, star anise, cocoa and hemp.
In some embodiments, the additional active substance comprises or derived
from one or more botanicals or constituents, derivatives or extracts thereof
and the
botanical is selected from rooibos and fennel. In some embodiments, the
additional
active substance comprises (or is) a botanical selected from rooibos and
fennel.
Flavours
The aerosol-generating material and/or the aerosol-generating composition
may optionally comprise a flavour. For example, the aerosol-generating
material
may comprise up to about 65 wt%, 55 wt%. 50 wt% or 45 wt% of a flavour. In
some
cases, the aerosol-generating material may comprise at least about 0.1 wt%, 1
wt%,
10 wt%, 20 wt%, 30 wt%, 35 wt% or 40 wt% of a flavour (all calculated on a dry
weight basis). For example, the aerosol-generating material may comprise 1-65
wt%, 10-65 wt%, 20-50 wt%, or 30-40 wt% a flavour.
As used herein, the terms "flavour" and "flavourant" refer to materials which,
where local regulations permit, may be used to create a desired taste, aroma
or other
somatosensorial sensation in a product for adult consumers. They may include
naturally occurring flavour materials, botanicals, extracts of botanicals,
synthetically
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obtained materials, or combinations thereof (e.g., tobacco, cannabis, licorice
(liquorice), hydrangea, eugenol, Japanese white bark magnolia leaf, chamomile,
fenugreek, clove, maple, matcha, menthol, Japanese mint, aniseed (anise),
cinnamon, turmeric, Indian spices, Asian spices, herb, wintergreen, cherry,
berry,
5 red berry, cranberry, peach, apple, orange, mango, clementine, lemon,
lime, tropical
fruit, papaya, rhubarb, grape, durian, dragon fruit, cucumber, blueberry,
mulberry,
citrus fruits, Drambuie, bourbon, scotch, whiskey, gin, tequila, rum,
spearmint,
peppermint, lavender, aloe vera, cardamom, celery, cascarilla, nutmeg,
sandalwood,
bergamot, geranium, khat, naswar, betel, shisha, pine, honey essence, rose
oil,
10 vanilla, lemon oil, orange oil, orange blossom, cherry blossom, cassia,
caraway,
cognac, jasmine, ylang-ylang, sage, fennel, wasabi, piment, ginger, coriander,
coffee, hemp, a mint oil from any species of the genus Mentha, eucalyptus,
star
anise, cocoa, lemongrass, rooibos, flax, ginkgo biloba, hazel, hibiscus,
laurel, mate,
orange skin, rose, tea such as green tea or black tea, thyme, juniper,
elderflower,
15 basil, bay leaves, cumin, oregano, paprika, rosemary, saffron, lemon
peel, mint,
beefsteak plant, curcuma, cilantro, myrtle, cassis, valerian, pimento, mace,
damien,
marjoram, olive, lemon balm, lemon basil, chive, carvi, verbena, tarragon,
limonene,
thymol, camphene), flavour enhancers, bitterness receptor site blockers,
sensorial
receptor site activators or stimulators, sugars and/or sugar substitutes
(e.g.,
sucralose, aces ulfame potassium, aspartame, saccharine, cyclamates, lactose,
sucrose, glucose, fructose, sorbitol, or mannitol), and other additives such
as
charcoal, chlorophyll, minerals, botanicals, or breath freshening agents. They
may
be imitation, synthetic or natural ingredients or blends thereof. They may be
in any
suitable form, for example, liquid such as an oil, solid such as a powder, or
gas.
In some embodiments, the flavour comprises menthol, spearmint and/or
peppermint.
In some embodiments, the flavour comprises flavour components of
cucumber, blueberry, citrus fruits and/or redberry.
In some embodiments, the flavour comprises eugenol.
In some embodiments, the flavour comprises flavour components extracted
from tobacco.
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16
In some embodiments, the flavour comprises flavour components extracted
from cannabis.
In some embodiments, the flavour may comprise a sensate, which is intended
to achieve a somatosensorial sensation which are usually chemically induced
and
perceived by the stimulation of the fifth cranial nerve (trigeminal nerve), in
addition
to or in place of aroma or taste nerves, and these may include agents
providing
heating, cooling, tingling, numbing effect. A suitable heat effect agent may
be, but is
not limited to, vanillyl ethyl ether and a suitable cooling agent may be, but
not
limited to eucolyptol or WS-3 (N-ethyl-2-isopropyl-5-
methylcyclohexanecarboxamide).
In some cases, the aerosol-generating material may additionally comprise an
emulsifying agent, which emulsifies molten flavour during manufacture. For
example, the aerosol-generating material may comprise from about 5 wt% to
about
wt% of an emulsifying agent (calculated on a dry weight basis), suitably about
15 lOwt%. The emulsifying agent may comprise acacia gum.
In some cases, the total content of additional active substance and/or flavour
may be at least about 0.1 wt%, 1 wt%. 5 wt%, 10 wt%, 20 wt%. 25 wt% or 30 wt%.
In some cases, the total content of additional active substance and/or flavour
may be
less than about 60 wt%, 50 wt% or 40 wt% (all calculated on a dry weight
basis).
Colourant
The aerosol-generating material may comprise a colourant. The addition of a
colourant may alter the visual appearance of the aerosol-generating material.
The
presence of colourant in the aerosol-generating material may enhance the
visual
appearance of the aerosol-generating material and the aerosol-generating
composition. By adding a colourant to the aerosol-generating material, the
aerosol-
generating material may be colour-matched to other components of the aerosol-
generating composition or to other components of an article comprising the
aerosol-
generating material.
A variety of colourants may be used depending on the desired colour of the
aerosol-generating material. The colour of aerosol-generating material may be,
for
example, white, green, red, purple, blue, brown or black. Other colours are
also
envisaged. Natural or synthetic colourants, such as natural or synthetic dyes,
food-
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17
grade colourants and pharmaceutical-grade colourants may be used. In certain
embodiments, the colourant is caramel, which may confer the aerosol-generating
material with a brown appearance. In such embodiments, the colour of the
aerosol-
generating material may be similar to the colour of other components (such as
tobacco material) in an aerosol-generating composition comprising the aerosol-
generating material. In some embodiments, the addition of a colourant to the
aerosol-generating material renders it visually indistinguishable from other
components in the aerosol-generating composition.
The colourant may be incorporated during the formation of the aerosol-
generating material (e.g. when forming a slurry comprising the materials that
form
the aerosol-generating material) or it may be applied to the aerosol-
generating
material after its formation (e.g. by spraying it onto the aerosol-generating
material).
Other functional material
The one or more other functional materials may comprise one or more of pH
regulators, preservatives, stabilisers, and/or antioxidants.
In some embodiments, the aerosol-generating material is formed as a sheet.
In some cases, the aerosol-generating material sheet may be incorporated into
the
non-combustible aerosol provision system or consumable in sheet form. The
aerosol-generating material sheet may be incorporated as a planar sheet, as a
gathered or bunched sheet, as a crimped sheet, as a rolled sheet (i.e. in the
form of a
tube), or as strips (e.g. formed by cutting the sheet into longitudinal
strips). In some
such cases, the aerosol-generating material of these embodiments may be
included
in the systemkonsumable as a sheet, such as a sheet circumscribing a rod of
aerosolisable material (e.g. tobacco). For example, the aerosol-generating
material
sheet may be formed on a wrapping paper which circumscribes an aerosolisable
material such as tobacco. In other cases, the sheet may be shredded and then
incorporated into the assembly, suitably mixed into an aerosoli sable material
such as
cut rag tobacco.
In some cases, the aerosol-generating material may be in the form of a sheet
or layer having a thickness of about 0.015 mm to about 1.0 mm. Suitably, the
thickness may be in the range of about 0.05 mm, 0.1 nam or 0.15 mm to about
0.5
mm or 0.3 mm, for example 0.1-3 mm or 0.15-3 mm. A material having a thickness
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18
of 0.2 mm may be particularly suitable. The aerosol-generating material may
comprise more than one layer, and the thickness described herein refers to the
aggregate thickness of those layers.
If the aerosol-generating material is too thick, then heating efficiency may
be
compromised. This adversely affects the power consumption in use. Conversely,
if
the aerosol-generating material is too thin, it may be difficult to
manufacture and
handle; a very thin material is harder to cast and may be fragile,
compromising
aerosol formation in use.
The thickness stipulated herein is a mean thickness for the material. In some
cases, the aerosol-generating material thickness may vary by no more than 25%,
20%, 15%, 10%, 5% or 1%.
In some examples, the aerosol-generating material in sheet form may have a
tensile strength of from around 200 N/m to around 2000 N/m. In some examples,
the
aerosol-generating material in sheet form may have a tensile strength of from
around
200 N/m to around 900 N/m. In some examples, such as where the aerosol-
generating material does not comprise a tiller, the aerosol-generating
material in
sheet form may have a tensile strength of from around 200 N/m to around 400
N/m,
or around 200 N/m to around 300 N/m, or about 250 N/m. Such tensile strengths
may be particularly suitable for embodiments wherein the aerosol-generating
material and/or the aerosol-generating composition is formed as a sheet and
then
shredded and incorporated into a consumable. In some examples, such as where
the
aerosol-generating material comprises a filler, the aerosol-generating
material may
have a tensile strength of from around 600 N/m to around 900 N/m, or from
around
700 N/m to around 900 N/m, or around 800 N/m. Such tensile strengths may be
particularly suitable for embodiments wherein the aerosol-generating material
and/or
the aerosol-generating composition is included in a consumable/non-combustible
aerosol provision system as a rolled sheet, suitably in the form of a tube.
The aerosol-generating composition comprising the aerosol-generating
material may have any suitable area density, such as from 30 g/m2 to 120 g/m2.
In
some cases, the aerosol-generating material may have a mass per unit area of
80-120
g/m2, or from about 70 to 110 g/m2, or particularly from about 90 to 110 g/m2,
or
suitably about 100 g/m2 (so that it has a similar density to cut rag tobacco
and a
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19
mixture of these substances will not readily separate). Such area densities
may be
particularly suitable where the aerosol-generating composition is included in
assembly consumable/system in sheet form, or as a shredded sheet (described
further
hereinbelow). In some cases, the aerosol-generating composition may have a
mass
per unit area of about 30 to 70 g/m2, 40 to 60 g/m2, or 25-60 g/m2 and may be
used
to wrap an aerosolisable material such as tobacco.
In some embodiments, the aerosol-generating material is formed as a film on
a support. The aerosol-generating film may be a continuous film or a
discontinuous
film, such as an arrangement of discrete portions of film on a support. In
some cases,
the aerosol-generating film does not comprise a filler.
The aerosol-generating material for use in aerosol generation may be present
on or in a support, to form a substrate. The support may, for example, be or
comprise paper, card, paperboard, cardboard, reconstituted material, a
plastics
material, a ceramic material, a composite material, glass, a metal, or a metal
alloy. In
some embodiments, the support comprises (or is) a susceptor. In some
embodiments,
the susceptor is an aluminium sheet. In some embodiments, the susceptor is
embedded within the material. In some alternative embodiments, the susceptor
is on
one or either side of the material.
The aerosol-generating composition may comprise a carrier on which the
aerosol-generating material is provided. The carrier functions as a support on
which
the aerosol-generating material layer forms, easing manufacture. The carrier
may
provide tensile strength to the aerosol-generating material layer, easing
handling.
In some cases, the carrier may be formed from materials selected from metal
foil, paper, carbon paper, greaseproof paper, ceramic, carbon allotropes such
as
graphite and graphene, plastic, cardboard, wood or combinations thereof. In
some
cases, the carrier may comprise or consist of a tobacco material, such as a
sheet of
reconstituted tobacco. In some cases, the carrier may be formed from materials
selected from metal foil, paper, cardboard, wood or combinations thereof. In
some
cases, the carrier itself be a laminate structure comprising layers of
materials
selected from the preceding lists. In some cases, the carrier may also
function as a
flavour carrier. For example, the carrier may be impregnated with a flavour or
with
tobacco extract.
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In some cases, the carrier may be magnetic. This functionality may be used
to fasten the carrier to the non-combustible aerosol provision device in use,
or may
be used to generate particular aerosol-generating material shapes. In some
cases, the
aerosol-generating composition may comprise one or more magnets which can be
5 used to fasten the material to an induction heater in use.
In some cases, the carrier may be substantially or wholly impermeable to gas
and/or aerosol. This prevents aerosol or gas passage through the carrier
layer,
thereby controlling the flow and ensuring it is delivered to the user. This
can also be
used to prevent condensation or other deposition of the gas/aerosol in use on,
for
10 example. the surface of a heater provided in an aerosol generating
assembly. Thus,
consumption efficiency and hygiene can be improved in some cases.
In some cases, the surface of the carrier that abuts the aerosol-generating
material may be porous. For example, in one case, the carrier comprises paper.
A
porous carrier such as paper has been found to be particularly suitable; the
porous
15 (e.g. paper) layer abuts the aerosol-generating material layer and forms
a strong
bond. The aerosol-generating material may be formed by drying a gel and,
without
being limited by theory, it is thought that the slurry from which the gel is
formed
partially impregnates the porous carrier (e.g. paper) so that when the gel
sets, the
carrier is partially bound into the gel. This provides a strong binding
between the gel
20 and the carrier (and between the dried gel and the carrier).
In some embodiments, the aerosol-generating material may be laminated to a
carrier, such as a paper sheet.
In some embodiments, when the aerosol-generating material is formed from
a slurry as described herein, the layer of slurry may be formed on a carrier,
such as a
paper sheet.
Additionally, surface roughness may contribute to the strength of bond
between the aerosol-generating material and the carrier. The paper roughness
(for
the surface abutting the carrier) may suitably be in the range of 50-1000 Bekk
seconds, suitably 50-150 Bekk seconds, suitably 100 Bekk seconds (measured
over
an air pressure interval of 50.66-48.00 kPa). (A Bekk smoothness tester is an
instrument used to determine the smoothness of a paper surface, in which air
at a
specified pressure is leaked between a smooth glass surface and a paper
sample, and
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the time (in seconds) for a fixed volume of air to seep between these surfaces
is the
"Bekk smoothness".)
Conversely, the surface of the carrier facing away from the aerosol-
generating material may be arranged in contact with the heater, and a smoother
surface may provide more efficient heat transfer. Thus, in some cases, the
carrier is
disposed so as to have a rougher side abutting the aerosol-generating material
and a
smoother side facing away from the aerosol-generating material.
In one particular case, the carrier may be a paper-backed foil; the paper
layer
abuts the aerosol-generating material layer and the properties discussed in
the
previous paragraphs are afforded by this abutment. The foil backing is
substantially
impermeable, providing control of the aerosol flow path. A metal foil backing
may
also serve to conduct heat to the aerosol-generating material.
In another case, the foil layer of the paper-backed foil abuts the aerosol-
generating material. The foil is substantially impermeable, thereby preventing
water
provided in the aerosol-generating material from being absorbed into the paper
which could weaken its structural integrity.
In some cases, the carrier is formed from or comprises metal foil, such as
aluminium foil. A metallic carrier may allow for better conduction of thermal
energy
to the aerosol-generating material. Additionally, or alternatively, a metal
foil may
function as a susceptor in an induction heating system. In particular
embodiments,
the carrier comprises a metal foil layer and a support layer, such as
cardboard. In
these embodiments, the metal foil layer may have a thickness of less than 20
pm,
such as from about 1 mn to about 10 p.m, suitably about 5 rtm.
In some cases, the carrier may have a thickness of between about 0.010 mm and
about 2.0 mm, suitably from about 0.015 mm, 0.02 mm, 0.05 mm or 0.1 mm to
about 1.5 mm, 1.0 mm, or 0.5 mm.
Consumable
In another aspect of the disclosure, there is provided a consumable for use in
a non-combustible aerosol provision device, the consumable comprising an
aerosol-
generating composition, wherein the aerosol-generating composition comprises
(or
consists of) an aerosol-generating material, the aerosol-generating material
comprising:
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- about 1 to about 30 wt% nicotine;
- about 15 to about 80 wt% gelling agent;
- about 10 to about 60 wt.% aerosol-former material;
- about 1 to about 30 wt% acid; and
- optionally filler,
wherein the wt% values are calculated on a dry weight basis; and
wherein the molar ratio of nicotine to acid is 2.2:1 or less.
In another aspect of the disclosure, there is provided a consumable
for use in a non-combustible aerosol provision device, the consumable
comprising
an aerosol-generating composition, wherein the aerosol-generating composition
comprises (or consists of) an aerosol-generating material, the aerosol-
generating
material comprising:
- about 5 to about 30 wt% nicotine salt;
- about 15 to about 80 wt% gelling agent;
- about 10 to about 60 wt% aerosol-former material; and
- optionally filler,
wherein the wt% values are calculated on a dry weight basis.
In another aspect of the disclosure, there is provided a consumable
for use in a non-combustible aerosol provision device, the consumable
comprising
an aerosol-generating composition, wherein the aerosol-generating composition
comprises (or consists of) an aerosol-generating material, the aerosol-
generating
material comprising:
- about 1 to about 30 wt% nicotine salt;
- about 45 to about 80 wt% gelling agent;
- about 10 to about 54 wt% aerosol-former material; and
- optionally filler,
wherein the wt% values are calculated on a dry weight basis.
In some embodiments, the disclosure relates to consumables comprising
aerosol-generating composition and configured to be used with non-combustible
aerosol provision devices. These consumables are sometimes referred to as
articles
throughout the disclosure.
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The consumable may be used with any suitable non-combustible aerosol
provision device.
A consumable is an article comprising or consisting of aerosol-generating
composition, part or all of which is intended to be consumed during use by a
user.
A consumable may comprise one or more other components, such as an
aerosol-generating composition storage area, an aerosol-generating composition
transfer component, an aerosol generation area, a housing, a wrapper, a
mouthpiece,
a filter and/or an aerosol-modifying agent. A consumable may also comprise an
aerosol generator, such as a heater, that emits heat to cause the aerosol-
generating
composition to generate aerosol in use. The heater may, for example, comprise
combustible material, a material heatable by electrical conduction, or a
susceptor.
In some embodiments, the consumable comprises a single aerosol-generating
composition. That is, the consumable comprises an aerosol-generating
composition
as defined herein, and no other aerosol-generating component(s), active(s),
agent(s)
or composition(s).
In some embodiments, the consumable is substantially free from tobacco. By
"substantially free from" it is meant that the material comprises less than 1
wt%,
such as less than 0.5 wt % tobacco. In some embodiments, the consumable is
free
from tobacco. In some embodiments, the consumable does not comprise tobacco
fibres.
A susceptor is a material that is heatable by penetration with a varying
magnetic field, such as an alternating magnetic field. The susceptor may be an
electrically-conductive material, so that penetration thereof with a varying
magnetic
field causes induction heating of the heating material. The heating material
may be
magnetic material, so that penetration thereof with a varying magnetic field
causes
magnetic hysteresis heating of the heating material. The susceptor may be both
electrically-conductive and magnetic, so that the susceptor is heatable by
both
heating mechanisms. The device that is configured to generate the varying
magnetic
field is referred to as a magnetic field generator, herein.
An aerosol-modifying agent is a substance, typically located downstream of
the aerosol generation area, that is configured to modify the aerosol
generated, for
example by changing the taste, flavour, acidity or another characteristic of
the
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aerosol. The aerosol-modifying agent may be provided in an aerosol-modifying
agent release component that is operable to selectively release the aerosol-
modifying
agent.
The aerosol-modifying agent may, for example, be an additive or a sorbent.
The aerosol-modifying agent may, for example, comprise one or more of a
flavourant, a colourant, water, and a carbon adsorbent. The aerosol-modifying
agent
may, for example, be a solid, a liquid, or a gel. The aerosol-modifying agent
may be
in powder, thread or granule form. The aerosol-modifying agent may be free
from
filtration material.
An aerosol generator is an apparatus configured to cause aerosol to be
generated from the aerosol-generating material. In some embodiments, the
aerosol
generator is a heater configured to subject the aerosol-generating material to
heat
energy, so as to release one or more volatiles from the aerosol-generating
composition to form an aerosol. In some embodiments, the aerosol generator is
configured to cause an aerosol to be generated from the aerosol-generating
composition without heating. For example, the aerosol generator may be
configured
to subject the aerosol-generating composition to one or more of vibration,
increased
pressure, or electrostatic energy.
Non-combustible aerosol provision system
In another aspect of the disclosure, there is provided a non-combustible
aerosol provision system comprising the consumable described herein and a non-
combustible aerosol provision device.
According to the present disclosure, a "non-combustible" aerosol provision
system is one where a constituent aerosol-generating material of the aerosol
provision system (or component thereof) is not combusted or burned in order to
facilitate delivery of at least one substance to a user.
In some embodiments, the delivery system is a non-combustible aerosol
provision system, such as a powered non-combustible aerosol provision system.
In some embodiments, the non-combustible aerosol provision system is an
aerosol-generating material heating system, also known as a heat-not-burn
system.
An example of such a system is a tobacco heating system.
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In some embodiments, the non-combustible aerosol provision device is a
heat-not-burn device.
In some embodiments, the non-combustible aerosol provision system is a
hybrid system to generate aerosol using a combination of aerosol-generating
5 materials, one or a plurality of which may be heated. In some
embodiments, the
hybrid system comprises the aerosol-generating material described herein
comprising or consisting of the aerosol-generating material and an additional
liquid
or gel aerosol-generating material.
In some embodiments, the non-combustible aerosol provision device is an
10 electronic tobacco hybrid device.
Typically, the non-combustible aerosol provision system may comprise a
non-combustible aerosol provision device and a consumable for use with the non-
combustible aerosol provision device.
In some embodiments, the non-combustible aerosol provision system, such
15 as a non-combustible aerosol provision device thereof, may comprise a
power
source and a controller. The power source may, for example, be an electric
power
source or an exothermic power source. In sonic embodiments, the exothermic
power
source comprises a carbon substrate which may be energised so as to distribute
power in the form of heat to an aerosol-generating material or to a heat
transfer
20 material in proximity to the exothermic power source.
In some embodiments, the non-combustible aerosol provision system, such
as a non-combustible aerosol provision device thereof, may comprise an area
for
receiving the consumable, an aerosol generator, an aerosol generation area, a
housing, a mouthpiece, a filter and/or an aerosol-modifying agent.
25 The non-combustible aerosol provision system or device may comprise
a
heater configured to heat but not bum the aerosol generating substrate. The
heater
may be, in some cases, a thin film, electrically resistive heater. In other
cases, the
heater may comprise an induction heater or the like. In yet further cases, the
heater
may be a combustible heat source or a chemical heat source which undergoes an
exothermic reaction to produce heat in use.
In some cases, the heater may heat but not burn the atrosolisable material(s)
to between 120 C and 350 C in use. In some cases, the heater may heat but not
burn
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the aerosolisable material(s) to between 140 C and 250 C in use. In some cases
in
use, substantially all of the aerosol-generating material is less than about 4
mm, 3
mm, 2 mm or 1 mm from the heater. In some cases, the solid is disposed between
about 0.017 mm and 2.0 mm from the heater, suitably between about 0.1 mm and
1.0 mm. These minimum distances may, in some cases, reflect the thickness of a
carrier that supports the aerosol-generating material. In some cases, a
surface of the
aerosol-generating material may directly abut the heater.
In some cases, the heater may be embedded in the aerosol-generating
material. In some such cases, the heater may be an electrically resistive
heater (with
exposed contacts for connection to an electrical circuit). In other such
cases, the
heater may be a susceptor embedded in the aerosol-generating material, which
is
heated by induction.
The non-combustible aerosol provision system may additionally comprise a
cooling element and/or a filter. The cooling element, if present, may act or
function
to cool gaseous or aerosol components. In some cases, it may act to cool
gaseous
components such that they condense to form an aerosol. It may also act to
space the
very hot parts of the apparatus from the user. The filter, if present, may
comprise
any suitable filter known in the art such as a cellulose acetate plug.
In some cases, the non-combustible aerosol provision system may be a heat-
not-bum system. That is, it may contain a solid material (and no liquid
aerosolisable
material). A heat-not-bum device is disclosed in WO 2015/062983 A2, which is
incorporated by reference in its entirety.
In some cases, the non-combustible aerosol provision system may comprise
an electronic tobacco hybrid device. That is, it may contain a solid
aerosolisable
material and a liquid aerosolisable material. The separate aerosolisable
materials
may be heated by separate heaters, the same heater or, in one case, a
downstream
aerosolisable material may be heated by a hot aerosol which is generated from
the
upstream aerosolisable material. An electronic tobacco hybrid device is
disclosed in
WO 2016/135331 Al, which is incorporated by reference in its entirety.
The consumable may alternatively be referred to herein as a cartridge. The
consumable may be adapted for use in a THP, an electronic tobacco hybrid
device or
another aerosol generating device. In some cases, the consumable may
additionally
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comprise a filter and/or cooling element, as described previously. In some
cases, the
consumable may be circumscribed by a wrapping material such as paper.
The consumable may additionally comprise ventilation apertures. These may
be provided in the sidewall of the article. In some cases, the ventilation
apertures
may be provided in the filter and/or cooling element. These apertures may
allow
cool air to be drawn into the article during use, which can mix with the
heated
volatilised components thereby cooling the aerosol.
The ventilation enhances the generation of visible heated volatilised
components from the article when it is heated in use. The heated volatilised
components are made visible by the process of cooling the heated volatilised
components such that supersaturation of the heated volatilised components
occurs.
The heated volatilised components then undergo droplet formation, otherwise
known as nucleation, and eventually the size of the aerosol particles of the
heated
volatilised components increases by further condensation of the heated
volatilised
components and by coagulation of newly formed droplets from the heated
volatilised components.
In some cases, the ratio of the cool air to the sum of the heated volatilised
components and the cool air, known as the ventilation ratio, is at least 15%.
A
ventilation ratio of 15% enables the heated volatilised components to be made
visible by the method described above. The visibility of the heated
volatilised
components enables the user to identify that the volatilised components have
been
generated and adds to the sensory experience of the smoking experience.
In another example, the ventilation ratio is between 50% and 85% to provide
additional cooling to the heated volatilised components. In some cases, the
ventilation ratio may be at least 60% or 65%.
Referring to Figures 1 and 2, there are shown a partially cut-away section
view and a perspective view of an example of article consumable 101
("article").
The article 101 is adapted for use with a device having a power source and a
heater.
The article 101 of this embodiment is particularly suitable for use with the
device 1
shown in Figures 5 to 7, described below. In use, the article 101 may be
removably
inserted into the device shown in Figure 5 at an insertion point 20 of the
device 1.
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The article 101 of one example is in the form of a substantially cylindrical
rod that
includes a body of aerosol-generating composition 103 and a filter assembly
105 in
the form of a rod. The aerosol-generating material comprises the aerosol-
generating
material described herein. In some embodiments, it may be included in sheet
form.
In some embodiments it may be included in the form of a shredded sheet. In
some
embodiments, the aerosol-generating material described herein may be
incorporated
in sheet form and in shredded form.
The filter assembly 105 includes three segments, a cooling segment 107, a
filter segment 109 and a mouth end segment 111. The article 101 has a first
end 113,
also known as a mouth end or a proximal end and a second end 115, also known
as a
distal end. The body of aerosol-generating composition 103 is located towards
the
distal end 115 of the article 101. In one example, the cooling segment 107 is
located
adjacent the body of aerosol-generating composition 103 between the body of
aerosol-generating composition 103 and the filter segment 109, such that the
cooling
segment 107 is in an abutting relationship with the aerosol generating-
composition
103 and the filter segment 103. In other examples, there may be a separation
between the body of aerosol-generating composition 103 and the cooling segment
107 and between the body of aerosol-generating composition 103 and the filter
segment 109. The filter segment 109 is located in between the cooling segment
107
and the mouth end segment 111. The mouth end segment 111 is located towards
the
proximal end 113 of the article 101, adjacent the filter segment 109. In one
example,
the filter segment 109 is in an abutting relationship with the mouth end
segment 111.
In one embodiment, the total length of the filter assembly 105 is between 37
mm and
45 mm, more preferably, the total length of the filter assembly 105 is 41 mm.
In one example, the rod of aerosol-generating composition 103 is between 34 mm
and 50 mm in length, suitably between 38 mm and 46 rnm in length, suitably 42
mm
in length_
In one example, the total length of the article 101 is between 71 rum and 95
mm, suitably between 79 mm and 87 mm, suitably 83 mm.
An axial end of the body of aerosol-generating composition 103 is visible at
the distal end 115 of the article 101. However, in other embodiments, the
distal end
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115 of the article 101 may comprise an end member (not shown) covering the
axial
end of the body of aerosol-generating composition 103.
The body of aerosol-generating composition 103 is joined to the filter
assembly 105 by annular tipping paper (not shown), which is located
substantially
around the circumference of the filter assembly 105 to surround the filter
assembly
105 and extends partially along the length of the body of aerosol-generating
composition 103. In one example, the tipping paper is made of 58GSM standard
tipping base paper. In one example the tipping paper has a length of between
42111111
and 50mm, suitably of 46mm.
In one example, the cooling segment 107 is an annular tube and is located
around and defines an air gap within the cooling segment. The air gap provides
a
chamber for heated volatilised components generated from the body of aerosol-
generating composition 103 to flow. The cooling segment 107 is hollow to
provide a
chamber for aerosol accumulation yet rigid enough to withstand axial
compressive
forces and bending moments that might arise during manufacture and whilst the
article 101 is in use during insertion into the device 1. In one example, the
thickness
of the wall of the cooling segment 107 is approximately 0.29mm.
The cooling segment 107 provides a physical displacement between the aerosol-
generating composition 103 and the filter segment 109. The physical
displacement
provided by the cooling segment 107 will provide a thermal gradient across the
length of the cooling segment 107. In one example the cooling segment 107 is
configured to provide a temperature differential of at least 40 degrees
Celsius
between a heated volatilised component entering a first end of the cooling
segment
107 and a heated volatilised component exiting a second end of the cooling
segment
107. In one example the cooling segment 107 is configured to provide a
temperature
differential of at least 60 degrees Celsius between a heated volatilised
component
entering a first end of the cooling segment 107 and a heated volatilised
component
exiting a second end of the cooling segment 107. This temperature differential
across the length of the cooling element 107 protects the temperature
sensitive filter
segment 109 from the high temperatures of the aerosol-generating composition
103
when it is heated by the device 1. If the physical displacement was not
provided
between the filter segment 109 and the body of aerosol-generating composition
103
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and the heating elements of the device 1, then the temperature sensitive
filter
segment may 109 become damaged in use, so it would not perform its required
functions as effectively.
In one example the length of the cooling segment 107 is at least 15mm. In
5 one example, the length of the cooling segment 107 is between 20mm and
30mm,
more particularly 23mm to 27mm, more particularly 25mm to 27mm, suitably
25mm.
The cooling segment 107 is made of paper, which means that it is comprised
of a material that does not generate compounds of concern, for example, toxic
10 compounds when in use adjacent to the heater of the device 1. In one
example. the
cooling segment 107 is manufactured from a spirally wound paper tube which
provides a hollow internal chamber yet maintains mechanical rigidity. Spirally
wound paper tubes are able to meet the tight dimensional accuracy requirements
of
high-speed manufacturing processes with respect to tube length, outer
diameter,
15 roundness and straightness.
In another example, the cooling segment 107 is a recess created from stiff
plug wrap or tipping paper. The stiff plug wrap or tipping paper is
manufactured to
have a rigidity that is sufficient to withstand the axial compressive forces
and
bending moments that might arise during manufacture and whilst the article 101
is
20 in use during insertion into the device 1.
The filter segment 109 may be formed of any filter material sufficient to
remove one or more volatilised compounds from heated volatilised components
from the aerosol-generating material. In one example the filter segment 109 is
made
of a mono-acetate material, such as cellulose acetate. The filter segment 109
25 provides cooling and irritation-reduction from the heated volatilised
components
without depleting the quantity of the heated volatilised components to an
unsatisfactory level for a user.
In some embodiments, a capsule (not illustrated) may be provided in filter
segment 109. It may be disposed substantially centrally in the filter segment
109,
30 both across the filter segment 109 diameter and along the filter segment
109 length.
In other cases, it may be offset in one or more dimension. The capsule may in
some
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31
cases, where present, contain a volatile component such as a flavour or
aerosol-
former material.
The density of the cellulose acetate tow material of the filter segment 109
controls the pressure drop across the filter segment 109, which in turn
controls the
draw resistance of the article 101. Therefore the selection of the material of
the filter
segment 109 is important in controlling the resistance to draw of the article
101. In
addition, the filter segment performs a filtration function in the article
101.
In one example, the filter segment 109 is made of a 8Y15 grade of filter tow
material, which provides a filtration effect on the heated volatilised
material, whilst
also reducing the size of condensed aerosol droplets which result from the
heated
volatilised material.
The presence of the filter segment 109 provides an insulating effect by
providing further cooling to the heated volatilised components that exit the
cooling
segment 107. This further cooling effect reduces the contact temperature of
the
user's lips on the surface of the filter segment 109.
In one example, the filter segment 109 is between 6mm to lOmm in length,
suitably 8mm.
The mouth end segment 111 is an annular tube and is located around and
defines an air gap within the mouth end segment 111. The air gap provides a
chamber for heated volatilised components that flow from the filter segment
109.
The mouth end segment 111 is hollow to provide a chamber for aerosol
accumulation yet rigid enough to withstand axial compressive forces and
bending
moments that might arise during manufacture and whilst the article is in use
during
insertion into the device 1. In one example, the thickness of the wall of the
mouth
end segment 111 is approximately 0.29mm. In one example, the length of the
mouth end segment 111 is between 6mm to lOmm, suitably 8mm.
The mouth end segment I I I may be manufactured from a spirally wound
paper tube which provides a hollow internal chamber yet maintains critical
mechanical rigidity. Spirally wound paper tubes are able to meet the tight
dimensional accuracy requirements of high-speed manufacturing processes with
respect to tube length, outer diameter, roundness and straightness.
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The mouth end segment 111 provides the function of preventing any liquid
condensate that accumulates at the exit of the filter segment 109 from coming
into
direct contact with a user.
It should be appreciated that, in one example, the mouth end segment 111
and the cooling segment 107 may be formed of a single tube and the filter
segment
109 is located within that tube separating the mouth end segment 111 and the
cooling segment 107.
Referring to Figures 3 and 4, there are shown a partially cut-away section
and perspective views of an example of an article 301. The reference signs
shown in
Figures 3 and 4 are equivalent to the reference signs shown in Figures 1 and
2, but
with an increment of 200.
In the example of the article 301 shown in Figures 3 and 4, a ventilation
region 317 is provided in the article 301 to enable air to flow into the
interior of the
article 301 from the exterior of the article 301. In one example the
ventilation region
317 takes the form of one or more ventilation holes 317 formed through the
outer
layer of the article 301. The ventilation holes may be located in the cooling
segment
307 to aid with the cooling of the article 301. In one example, the
ventilation region
317 comprises one or more rows of holes, and preferably, each row of holes is
arranged circumferentially around the article 301 in a cross-section that is
substantially perpendicular to a longitudinal axis of the article 301.
In one example, there are between one to four rows of ventilation holes to
provide ventilation for the article 301. Each row of ventilation holes may
have
between 12 to 36 ventilation holes 317. The ventilation holes 317 may, for
example,
be between 100 to 5001im in diameter. In one example, an axial separation
between
rows of ventilation holes 317 is between 0.25mm and 0.75mm, suitably 0.5mm.
In one example, the ventilation holes 317 are of uniform size. In another
example,
the ventilation holes 317 vary in size. The ventilation holes can be made
using any
suitable technique, for example, one or more of the following techniques:
laser
technology, mechanical perforation of the cooling segment 307 or pre-
perforation of
the cooling segment 307 before it is formed into the article 301. The
ventilation
holes 317 are positioned so as to provide effective cooling to the article
301.
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In one example, the rows of ventilation holes 317 are located at least 1 lmm
from the
proximal end 313 of the article, suitably between 17min and 20mm from the
proximal end 313 of the article 301. The location of the ventilation holes 317
is
positioned such that user does not block the ventilation holes 317 when the
article
301 is in use.
Providing the rows of ventilation holes between 17mm and 20mm from the
proximal end 313 of the article 301 enables the ventilation holes 317 to be
located
outside of the device 1, when the article 301 is fully inserted in the device
1, as can
be seen in Figures 6 and 7. By locating the ventilation holes outside of the
device,
non-heated air is able to enter the article 301 through the ventilation holes
from
outside the device 1 to aid with the cooling of the article 301.
The length of the cooling segment 307 is such that the cooling segment 307
will be partially inserted into the device 1, when the article 301 is fully
inserted into
the device 1. The length of the cooling segment 307 provides a first function
of
providing a physical gap between the heater arrangement of the device 1 and
the
heat sensitive filter arrangement 309, and a second function of enabling the
ventilation holes 317 to he located in the cooling segment, whilst also being
located
outside of the device 1, when the article 301 is fully inserted into the
device 1. As
can be seen from Figures 6 and 7, the majority of the cooling element 307 is
located
within the device 1. However, there is a portion of the cooling element 307
that
extends out of the device 1. It is in this portion of the cooling element 307
that
extends out of the device 1 in which the ventilation holes 317 are located.
Referring now to Figures 5 to 7 in more detail, there is shown an example of a
device 1 arranged to heat aerosol-generating composition to volatilise at
least one
component of said aerosol-generating material, typically to form an aerosol
which
can be inhaled. The device 1 is a heating device which releases compounds by
heating, hut not burning, the aerosol-generating material.
A first end 3 is sometimes referred to herein as the mouth or proximal end 3
of the device 1 and a second end 5 is sometimes referred to herein as the
distal end 5
of the device 1. The device 1 has an on/off button 7 to allow the device 1 as
a whole
to be switched on and off as desired by a user.
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The device 1 comprises a housing 9 for locating and protecting various
internal components of the device 1. In the example shown, the housing 9
comprises
a uni-body sleeve 11 that encompasses the perimeter of the device 1, capped
with a
top panel 17 which defines generally the 'top' of the device 1 and a bottom
panel 19
which defines generally the 'bottom' of the device 1. In another example the
housing comprises a front panel, a rear panel and a pair of opposite side
panels in
addition to the top panel 17 and the bottom panel 19.
The top panel 17 and/or the bottom panel 19 may be removably fixed to the
uni-body sleeve 11, to permit easy access to the interior of the device 1, or
may be
"permanently" fixed to the uni-body sleeve 11, for example to deter a user
from
accessing the interior of the device 1. In an example, the panels 17 and 19
are made
of a plastics material, including for example glass-filled nylon formed by
injection
moulding, and the uni-body sleeve 11 is made of aluminium, though other
materials
and other manufacturing processes may be used.
The top panel 17 of the device 1 has an opening 20 at the mouth end 3 of the
device 1 through which, in use, the article 101, 301 including the aerosol-
generating
material may be inserted into the device 1 and removed from the device 1 by a
user.
The housing 9 has located or fixed therein a heater arrangement 23, control
circuitry 25 and a power source 27. In this example, the heater arrangement
23, the
control circuitry 25 and the power source 27 are laterally adjacent (that is,
adjacent
when viewed from an end), with the control circuitry 25 being located
generally
between the heater arrangement 23 and the power source 27, though other
locations
are possible.
The control circuitry 25 may include a controller, such as a microprocessor
arrangement, configured and arranged to control the heating of the aerosol-
generating material in the article 101, 301 as discussed further below.
The power source 27 may be for example a battery, which may be a
rechargeable battery or a non-rechargeable battery. Examples of suitable
batteries
include for example a lithium-ion battery, a nickel battery (such as a nickel-
cadmium battery), an alkaline battery and/ or the like. The battery 27 is
electrically
coupled to the heater arrangement 23 to supply electrical power when required
and
under control of the control circuitry 25 to heat the aerosol-generating
material in
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the article (as discussed, to volatilise the aerosol-generating material
without causing
the aerosol-generating material to burn).
An advantage of locating the power source 27 laterally adjacent to the heater
arrangement 23 is that a physically large power source 25 may be used without
5 causing the device 1 as a whole to be unduly lengthy. As will be
understood, in
general a physically large power source 25 has a higher capacity (that is, the
total
electrical energy that can be supplied, often measured in Amp-hours or the
like) and
thus the battery life for the device 1 can be longer.
In one example, the heater arrangement 23 is generally in the form of a
10 hollow cylindrical tube, having a hollow interior heating chamber into
which the
article 101, 301 comprising the aerosol-generating composition is inserted for
heating in use. Different arrangements for the heater arrangement 23 are
possible.
For example, the heater arrangement 23 may comprise a single heating element
or
may be formed of plural heating elements aligned along the longitudinal axis
of the
15 heater arrangement 23. The or each heating element may be annular or
tubular, or at
least part-annular or part-tubular around its circumference. In an example,
the or
each heating element may be a thin film heater. In another example, the, or
each
heating element may be made of a ceramics material. Examples of suitable
ceramics
materials include alumina and aluminium nitride and silicon nitride ceramics,
which
20 may be laminated and sintered. Other heating arrangements are possible,
including
for example inductive heating, infrared heater elements, which heat by
emitting
infrared radiation, or resistive heating elements formed by for example a
resistive
electrical winding.
In one particular example, the heater arrangement 23 is supported by a
25 stainless steel support tube and comprises a polyimide heating element.
The heater
arrangement 23 is dimensioned so that substantially the whole of the body of
aerosol-generating composition 103, 303 of the article 101, 301 is inserted
into the
heater arrangement 23 when the article 101, 301 is inserted into the device 1.
The or each heating element may be arranged so that selected zones of the
30 aerosol-generating material can be independently heated, for example in
turn (over
time, as discussed above) or together (simultaneously) as desired.
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The heater arrangement 23 in this example is surrounded along at least part
of its length by a thermal insulator 31. The insulator 31 helps to reduce heat
passing
from the heater arrangement 23 to the exterior of the device 1. This helps to
keep
down the power requirements for the heater arrangement 23 as it reduces heat
losses
generally. The insulator 31 also helps to keep the exterior of the device 1
cool during
operation of the heater arrangement 23. In one example, the insulator 31 may
be a
double-walled sleeve which provides a low pressure region between the two
walls of
the sleeve. That is, the insulator 31 may be for example a "vacuum" tube, i.e.
a tube
that has been at least partially evacuated so as to minimise heat transfer by
conduction and/or convection. Other arrangements for the insulator 31 are
possible,
including using heat insulating materials, including for example a suitable
foam-type
material, in addition to or instead of a double-walled sleeve.
The housing 9 may further comprises various internal support structures 37
for supporting all internal components, as well as the heating arrangement 23.
The device 1 further comprises a collar 33 which extends around and
projects from the opening 20 into the interior of the housing 9 and a
generally
tubular chamber 35 which is located between the collar 33 and one end of the
vacuum sleeve 31. The chamber 35 further comprises a cooling structure 35f,
which
in this example, comprises a plurality of cooling fins 35f spaced apart along
the
outer surface of the chamber 35, and each arranged circumferentially around
outer
surface of the chamber 35. There is an air gap 36 between the hollow chamber
35
and the article 101, 301 when it is inserted in the device 1 over at least
part of the
length of the hollow chamber 35. The air gap 36 is around all of the
circumference
of the article 101, 301 over at least part of the cooling segment 307.
The collar 33 comprises a plurality of ridges 60 arranged circumferentially
around the periphery of the opening 20 and which project into the opening 20.
The
ridges 60 take up space within the opening 20 such that the open span of the
opening
20 at the locations of the ridges 60 is less than the open span of the opening
20 at the
locations without the ridges 60. The ridges 60 are configured to engage with
an
article 101, 301 inserted into the device to assist in securing it within the
device 1.
Open spaces (not shown in the Figures) defined by adjacent pairs of ridges 60
and
the article 101, 301 form ventilation paths around the exterior of the article
101, 301.
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These ventilation paths allow hot vapours that have escaped from the article
101,
301 to exit the device 1 and allow cooling air to flow into the device 1
around the
article 101, 301 in the air gap 36.
In operation, the article 101, 301 is removably inserted into an insertion
point
20 of the device 1, as shown in Figures 5 to 7. Referring particularly to
Figure 6, in
one example, the body of aerosol-generating composition 103, 303, which is
located
towards the distal end 115, 315 of the article 101, 301, is entirely received
within the
heater arrangement 23 of the device 1. The proximal end 113, 313 of the
article 101,
301 extends from the device 1 and acts as a mouthpiece assembly for a user.
In operation. the heater arrangement 23 will heat the article 101, 301 to
volatilise at
least one component of the aerosol-generating compostion from the body of
aerosol-
generating material 103, 303.
The primary flow path for the heated volatilised components from the body
of aerosol-generating composition 103, 303 is axially through the article 101,
301,
through the chamber inside the cooling segment 107. 307, through the filter
segment
109, 309, through the mouth end segment 111, 311 to the user. In one example,
the
temperature of the heated volatilised components that are generated from the
body
of aerosol-generating material is between 60 C and 250 C, which may be above
the
acceptable inhalation temperature for a user. As the heated volatilised
component
travels through the cooling segment 107, 307, it will cool and some
volatilised
components will condense on the inner surface of the cooling segment 107, 307.
In the examples of the article 301 shown in Figures 3 and 4, cool air will be
able to
enter the cooling segment 307 via the ventilation holes 317 formed in the
cooling
segment 307. This cool air will mix with the heated volatilised components to
provide additional cooling to the heated volatilised components.
Method of manufacture
In another aspect, there is provided a method of forming an aerosol-generating
material comprising:
- about 1 to about 30 wt% nicotine;
- about 15 to about 80 wt% gelling agent;
- about 10 to about 60 wt% aerosol-former material;
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- about 1 to about 30 wt% acid; and
- optionally filler,
wherein the wt% values are calculated on a dry weight basis; and
wherein the molar ratio of nicotine to acid is 2.2:1 or less;
the method comprising:
(a) providing a slurry comprising nicotine, gelling agent, aerosol-former
material, acid, a solvent and any optional further components of the aerosol-
generating material;
(b) forming a layer of the slurry;
(c) optionally setting or cross-linking the layer of the slurry; and
(d) drying the slurry to form the aerosol-generating
material.
In another aspect, there is provided a method of forming an aerosol-generating
material comprising:
- about 5 to about 30 wt% nicotine salt;
- about 15 to about 80 wt% gelling agent;
- about 10 to about 60 wt% aerosol-former material; and
- optionally filler,
wherein the wt% values are calculated on a dry weight basis;
the method comprising:
(a) providing a slurry comprising nicotine salt, gelling agent, aerosol-
former
material, acid, a solvent and any optional further components of the aerosol-
generating material;
(b) forming a layer of the slurry;
(c) optionally setting or cross-linking the layer of the slurry; and
(d) drying the slurry to form the aerosol-generating material.
In another aspect, there is provided a method of forming an aerosol-
generating material comprising:
- about 1 to about 30 wt% nicotine salt;
- about 45 to about 80 wt% gelling agent;
- about 10 to about 54 wt% aerosol-former material; and
- optionally filler,
wherein the wt% values are calculated on a dry weight basis;
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the method comprising:
(a) providing a slurry comprising nicotine salt, gelling
agent, aerosol-former
material, acid, a solvent and any optional further components of the aerosol-
generating material;
(b) forming a layer of the slurry;
(c) optionally setting or cross-linking the layer of the slurry; and
(d) drying the slurry to form the aerosol-generating material.
Another aspect of the invention provides a method of making the consumable Or
system as previously described. This method comprises a method of making the
aerosol-generating material and incorporating the aerosol-generating material
into
the consumable or system. The method may comprise (a) forming a slurry
comprising components of the aerosol-generating material or precursors
thereof, (b)
forming a layer of the slurry, and (c) optionally setting or cross-linking the
slurry,
(d) drying to form an aerosol-generating material, and (e) incorporating the
resulting
aerosol-generating material into the consumable or system.
In step (a), the nicotine or nicotine salt may first be dissolved in the
aerosol-
former material and the resulting solution then added to the other components
of the
slurry.
The step (b) in the above methods of forming a layer of the slurry may
comprise
spraying, casting or extruding the slurry, for example. In some cases, the
layer is
formed by electrospraying the slurry. In some cases, the layer is formed by
casting
the slurry.
In some cases, the steps (b) and/or (c) and/or (d) may, at least partially,
occur
simultaneously (for example, during electrospraying). In some cases, these
steps
may occur sequentially.
In some cases, a setting or cross-linking agent (such as a calcium source)
may he added to the slurry before or during step (h). This is appropriate in
instances
where gelation occurs relatively slowly (e.g. with alginate gelling agent),
and thus
the slurry may be, e.g. cast, after the setting agent is added.
In other cases, step (c) of setting or cross-linking the slurry may comprise
the
addition of a setting or cross-linking agent to the slurry layer. The setting
or cross-
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linking agent may be sprayed onto the slurry, for example, or may be preloaded
onto
the surface on which the slurry is layered.
For example, a setting or cross-linking agent comprising a calcium source
(such as calcium chloride or calcium citrate), may be added to a slurry
containing
5 alginate and/or pectin to form a calcium-crosslinked alginate/pectin gel.
In some
cases where gelation occurs rapidly (such as those in which a pectin gelling
agent is
used), the calcium should be added after casting (because the slurry is too
viscous to
cast).
The total amount of the setting or cross-linking agent, such as a calcium
10 source, may be 0.5-5 wt% (calculated on a dry weight basis). It has been
found that
the addition of too little setting or cross-linking agent may result in a gel
which does
not stabilise any optional flavour and results in the flavour dropping out of
the gel. It
has also been found that the addition of too much setting agent or cross-
linking
results in a gel that is very tacky or very brittle and consequently has poor
15 handleability.
Alginate salts are derivatives of alginic acid and are typically high
molecular
weight polymers (10-600 kDa). Alginic acid is a copolymer of 13-D-mannuronic
(M)
and a-L-guluronic acid (G) units (blocks) linked together with (1,4)-
glycosidic
bonds to form a polysaccharide. On addition of calcium cations, the alginate
20 crosslinks to form a gel. Alginate salts with a high G monomer content
may more
readily form a gel on addition of the calcium source. In some cases therefore,
the
gel-precursor may comprise an alginate salt in which at least about 40%, 45%,
50%,
55%, 60% or 70% of the monomer units in the alginate copolymer are a-L-
guluronic
acid (G) units.
25 In some cases, the slurry may be warmed prior to and during casting.
This
can slow gelation, improving handleability and easing the casting process.
Further,
warming the slurry may melt optional flavour components (e.g. menthol) easing
handleability.
In some cases, menthol or other optional flavours may be distributed through
30 the slurry in powder form. In some cases, menthol or other flavours may
be molten
in the slurry (where it is warmed). In such cases, an emulsifying agent such
as acacia
gum may be added to disperse molten menthol in the slurry.
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In some cases, the slurry may be cast onto a bandcast sheet. The sheet may
be loaded with a releasing agent, such as lecithin, which can aid separation
of the
bandcast and the aerosol-generating material.
In another aspect, there is provided a slurry comprising:
- about 1 to about 30 wt% nicotine;
- about 15 to about 80 wt% gelling agent;
- about 10 to about 60 wt% aerosol-former material;
- about 1 to about 30 wt% acid; and
- optionally filler,
wherein the wt% values are calculated on a dry weight basis; and
wherein the molar ratio of nicotine to acid is 2.2:1 or less; and
- a solvent.
In another aspect, there is provided a slurry comprising:
- about 5 to about 30 wt% nicotine salt;
- about 15 to about 80 wt% gelling agent;
- about 10 to about 60 wt% aerosol-former material; and
- optionally filler,
wherein the wt% values are calculated on a dry weight basis; and
- a solvent.
In another aspect, there is provided a slurry comprising:
- about 1 to about 30 wt% nicotine salt;
- about 45 to about 80 wt% gelling agent;
- about 10 to about 54 wt% aerosol-former material; and
- optionally filler,
wherein the wt% values are calculated on a dry weight basis; and
- a solvent.
In some embodiments the slurry solvent comprises, or is, one or more of
water, ethanol, methanol, dimethyl sulfoxide, acetone, hexane, and toluene.
In particular embodiments, the slurry solvent may comprise water. In some
cases,
the slurry solvent may consist essentially of or consist of water.
In some cases, the slurry may comprise from about 50 wt%, 60 wt%, 70
wt%, 80 wt% or 90 wt% of solvent (WWB).
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In some examples, the slurry has a viscosity of from about 1 to about 20 Pa- s
at 46.5 C, such as from about 10 to about 20 Pas at 46.5 C, such as from
about 14
to about 16 Pas at 46.5 C.
The discussion herein relating to the aerosol-generating material is
explicitly
disclosed in combination with any slurry aspect of the invention.
Example Embodiments
1. An aerosol-generating material comprising:
- about 1 to about 30 wt% nicotine;
- about 15 to about 80 wt% gelling agent;
- about 10 to about 60 wt% aerosol-former material;
- about 1 to about 30 wt% acid; and
- optionally filler
wherein the wt% values are calculated on a dry weight basis; and
wherein the molar ratio of nicotine to acid is 2.2:1 or less.
1A. A slurry comprising:
- about 1 to about 30 wt% nicotine;
- about 15 to about 80 wt% gelling agent;
- about 10 to about 60 wt% aerosol-former material;
- about 1 to about 30 wt% of an acid; and
- optionally filler
wherein the wt% values are calculated on a dry weight basis; and
wherein the molar ratio of nicotine to acid is 2.2:1 or less, and
- a solvent.
2. The aerosol-generating material of Embodiment 1 or the slurry of Embodiment
1A,
comprising about 1-15 wt% nicotine.
3. The aerosol-generating material or slurry of Embodiment 2, comprising about
1-10
wt% nicotine.
4. The aerosol-generating material of Embodiment 1 or the slurry of Embodiment
1A,
comprising about 3-15wt% nicotine.
5. The aerosol-generating material or slurry of Embodiment 4, comprising about
3-10
wt% nicotine.
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6. The aerosol-generating material of Embodiment 1 or the slurry of Embodiment
1A,
comprising about 5-15 wt% nicotine.
7. The aerosol-generating material or slurry of Embodiment 6, comprising about
5-10
wt% nicotine.
8. The aerosol-generating material or slurry of any preceding Embodiment
comprising
about 1-15 wt% acid.
9. The aerosol-generating material or slurry of Embodiment 8, comprising about
1-10
wt% acid.
10. The aerosol-generating material or slurry of Embodiment 8, comprising
about 3-
15wt% acid.
11. The aerosol-generating material or slurry of Embodiment 10, comprising
about 3-
10 wt.% acid.
12. The aerosol-generating material or slurry of Embodiment 10, comprising
about 5-
wt% acid.
15 13. The aerosol-generating material or slurry of Embodiment 9,
comprising about 5-
10 wt% acid.
14. The aerosol-generating material or slurry of any preceding Embodiment,
wherein
the molar ratio of nicotine to acid is 2:1 or less.
15. The aerosol-generating material or slurry of Embodiment 14, wherein the
molar
ratio of nicotine to acid is 1.5:1 or less.
16. The aerosol-generating material or slurry of Embodiment 15, wherein the
molar
ratio of nicotine to acid is 1 or less.
17. The aerosol-generating material or slurry of any preceding Embodiment,
wherein
the molar ratio of nicotine to acid is 0.5:1 or more.
18. The aerosol-generating material or slurry of Embodiment 17, wherein the
molar
ratio of nicotine to acid is 0.7:1 or more.
19. The aerosol-generating material or slurry of Embodiment 18, wherein the
molar
ratio of nicotine to acid is 0.8:1 or more.
20. The aerosol-generating material or slurry of any of Embodiments 1-12,
wherein
the molar ratio of nicotine to acid is 0.5:1 to 2.2:1.
21. The aerosol-generating material or slurry of Embodiment 20, wherein the
molar
ratio of nicotine to acid is 0.7:1 to 2:1.
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22. The aerosol-generating material or slurry of Embodiment 21, wherein the
molar
ratio of nicotine to acid is 0.7:1 to 1.5:1.
23. The aerosol-generating material or slurry of any of Embodiments 1 to 22,
wherein
the acid comprises at least one of succinic acid, lactic acid, benzoic acid,
citric acid,
tartartic acid, fumaric acid, levulinic acid, acetic acid, malic acid, formic
acid, sorbic
acid, benzoic acid, propanoic acid and pyruvic acid.
23A. The aerosol-generating material or slurry of any of Embodiments 1 to 22,
wherein the acid comprises at least one of lactic acid, benzoic acid,
levulinic acid and
pyruvic acid.
24. The aerosol-generating material or slurry of any of Embodiments 1 to 22,
wherein the acid comprises (or consists of) benzoic acid.
25. The aerosol-generating material or slurry of any of Embodiments 1 to 22,
wherein the acid comprises (or consists of) lactic acid.
26. An aerosol-generating material comprising:
- about 5 to about 30 wt% nicotine salt;
- about 15 to about 80 wt% gelling agent;
- about 10 to about 60 wt% aerosol-former material; and
- optionally filler
wherein the wt% values are calculated on a dry weight basis.
26A. An slurry comprising:
- about 5 to about 30 wt% nicotine salt;
- about 15 to about 80 wt% gelling agent;
- about 10 to about 60 wt% aerosol-former material;
- optionally filler
wherein the wt% values are calculated on a dry weight basis; and
- a solvent.
27. The aerosol-generating material of Embodiment 26 or the slurry of
Embodiment
26A, comprising about 5-15 wt% nicotine salt.
28. The aerosol-generating material or slurry of Embodiment 27, comprising
about
5-10 wt% nicotine salt.
29. The aerosol-generating material or slurry of any of Embodiments 26 to 28,
wherein the nicotine salt comprises nicotine benzoate.
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30. The aerosol-generating material or slurry of any of Embodiments 26 to 28,
wherein the nicotine salt comprises nicotine lactate.
31. The aerosol-generating material or slurry of any preceding Embodiment,
comprising about 20-70 wt% gelling agent.
5 32. The aerosol-generating material or slurry of Embodiment 31,
comprising about
20-65 wt% gelling agent.
33. The aerosol-generating material or slurry of Embodiment 31, comprising
about
25-70 wt% gelling agent.
34. The aerosol-generating material or slurry of Embodiment 33, comprising
about
10 25-65 wt% gelling agent.
35. The aerosol-generating material or slurry of Embodiment 33, comprising
about
30-70 wt% gelling agent.
36. The aerosol-generating material or slurry of Embodiment 35, comprising
about
30-65 wt% gelling agent.
15 37. The aerosol-generating material or slurry of Embodiment 35,
comprising about
35-70 wt% gelling agent.
38. The aerosol-generating material or slurry of Embodiment 37, comprising
about
35-65 wt' gelling agent.
39. The aerosol-generating material or slurry of Embodiment 37, comprising
about
20 40-70 wt% gelling agent.
40. The aerosol-generating material or slurry of Embodiment 39, comprising
about
40-65 wt% gelling agent.
41. The aerosol-generating material or slurry of Embodiment 39, comprising
about
45-70 wt% gelling agent.
25 42. The aerosol-generating material or slurry of Embodiment 41,
comprising about
40-65 wt% gelling agent.
43. The aerosol-generating material or slurry of any preceding Embodiment,
comprising about 15-60 wt% aerosol-former material.
43A. The aerosol-generating material or slurry of any preceding Embodiment,
30 comprising about 15-55 wt% aerosol-former material.
44. The aerosol-generating material or slurry of Embodiment 43 or 43A,
comprising
about 15-50 wt% aerosol-former material.
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45. The aerosol-generating material or slurry of Embodiment 43, comprising
about
20-55 wt% aerosol-former material.
46. The aerosol-generating material or slurry of Embodiment 45, comprising
about
20-50 wt% aerosol-former material.
47. The aerosol-generating material or slurry of Embodiment 45, comprising
about
25-55 wt% aerosol-former material.
48. The aerosol-generating material or slurry of Embodiment 47, comprising
about
25-50 wt% aerosol-former material.
49. The aerosol-generating material or slurry of Embodiment 47, comprising
about
30-55 wt% aerosol-former material.
50. The aerosol-generating material or slurry of Embodiment 49, comprising
about
30-50 wt% aerosol-former material.
51. An aerosol-generating material comprising:
- about 1 to about 30 wt% nicotine salt;
- about 45 to about 80 wt% gelling agent;
- about 10 to about 54 wt% aerosol-former material; and
- optionally filler
wherein the wt% values are calculated on a dry weight basis.
51A. A slurry comprising:
- about 1 to about 30 wt.% nicotine salt;
- about 45 to about 80 wt% gelling agent;
- about 10 to about 54 wt% aerosol-former material;
- optionally filler
wherein the wt% values are calculated on a dry weight basis; and
- a solvent.
52. The aerosol-generating material of Embodiment 51 or the slurry of
Embodiment
5IA, comprising about I - S wt% nicotine salt.
53. The aerosol-generating material or slurry of Embodiment 52, comprising
about
1-10 wt% nicotine salt.
54. The aerosol-generating material or slurry of Embodiment 52, comprising
about
3-15 wt% nicotine salt.
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55. The aerosol-generating material or slurry of Embodiment 54, comprising
about
3-10 wt% nicotine salt.
56. The aerosol-generating material or slurry of Embodiment 54, comprising
about
5-15 wt% nicotine salt.
57. The aerosol-generating material or slurry of Embodiment 56, comprising
about
5-10 wt% nicotine salt.
58. The aerosol-generating material or slurry of any of Embodiments 51 to 57,
wherein the nicotine salt comprises nicotine benzoate.
59. The aerosol-generating material or slurry of any of Embodiments 51 to 57,
wherein the nicotine salt comprises nicotine lactate.
60. The aerosol-generating material or slurry of any of Embodiments 51 to 59,
comprising about 45-70 wt% gelling agent.
61. The aerosol-generating material or slurry of Embodiment 60, comprising
about
45-65 wt% gelling agent.
62. The aerosol-generating material or slurry of Embodiment 60, comprising
about
50-70 wt% gelling agent.
63. The aerosol-generating material or slurry of any Embodiment 62, comprising
about 50-65 wt% gelling agent.
64. The aerosol-generating material or slurry of any of Embodiments 51 to 59,
comprising about 15-60 wt% aerosol-former material.
64A. The aerosol-generating material or slurry of any of Embodiments 51 to 59,
comprising about 15-50 wt% aerosol-former material.
65. The aerosol-generating material or slurry of Embodiment 64, comprising
about
20-50 wt% aerosol-former material.
66. The aerosol-generating material or slurry of Embodiment 65, comprising
about
25-50 wt% aerosol-former material.
67. The aerosol-generating material or slurry of Embodiment 66, comprising
about
30-50 wt% aerosol-former material.
68. The aerosol-generating material or slurry of any preceding Embodiment,
wherein the gelling agent comprises a hydrocolloid.
68. The aerosol-generating agent or slurry of any preceding Embodiment,
wherein
the gelling agent comprises (or is) one or more compounds selected from
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polysaccharide gelling agents, such as alginate, pectin, starch or a
derivative thereof,
cellulose or a derivative thereof, pullulan, carrageenan, agar and agarose;
gelatin;
gums, such as xanthan gum, guar gum and acacia gum; silica or silicone
compounds,
such as PDMS and sodium silicate; clays, such as kaolin; and polyvinyl
alcohol.
69. The aerosol-generating material or slurry of any preceding Embodiment,
wherein the gelling agent comprises one or more polysaccharide gelling agents.
70. The aerosol-generating material or slurry of any preceding Embodiment,
wherein the gelling agent is one or more polysaccharide gelling agents.
71. The aerosol-generating material or slurry of any of Embodiments 68 to 70,
wherein the polysaccharide gelling agent is selected from: alginate, pectin,
starch or
a derivative thereof, cellulose or a derivative thereof.
72. The aerosol-generating material or slurry of Embodiment 71, wherein the
polysaccharide gelling agent is a cellulose derivative.
73. The aerosol-generating material or slurry of any of Embodiments 69 to 72,
wherein the cellulose or the derivative thereof, is selected from
hydroxymethyl
cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose,
carboxymethylcellulose
(CMC), hydroxypropyl methylcellulose (HPMC), methyl cellulose, ethyl
cellulose,
cellulose acetate (CA), cellulose acetate butyrate (CAB), and cellulose
acetate
propionate (CAP).
74. The aerosol-generating material or slurry of Embodiment 73, wherein the
cellulose or the derivative thereof, is CMC.
75. The aerosol-generating material or slurry of Embodiment 74, wherein CMC is
the only gelling agent present in the aerosol-generating material or slurry.
76. The aerosol-generating material or slurry of Embodiment 71, wherein the
polysaccharide gelling agent is alginate.
77. The aerosol-generating material or slurry of Embodiment 76, wherein
alginate is
the only gelling agent present in the aerosol-generating material or slurry.
78. The aerosol-generating material or slurry of Embodiment 68, wherein the
gelling
agent comprises (or is) one or more of alginate, pectin, hydroxyethyl
cellulose,
hydroxypropyl cellulose, carboxymethylcellulose, pullulan, xanthan gum guar
gum,
carrageenan, agarose, acacia gum, fumed silica, PDMS, sodium silicate, kaolin
and
polyvinyl alcohol.
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79. The aerosol-generating material or slurry of Embodiment 68, wherein the
gelling
agent comprises (or is) one or more of hydroxyethyl cellulose, hydroxypropyl
cellulose, carboxymethylcellulose, guar gum, acacia gum, alginate and/or
pectin.
80. The aerosol-generating material or slurry of any of Embodiments 68-72, 73,
74
or 76-79, wherein the alginate is sodium alginate.
81. The aerosol-generating material or slurry of any preceding Embodiment,
wherein the gelling agent is not crosslinked.
82 The aerosol-generating material or slurry of any preceding Embodiment,
wherein
the aerosol-generating agent comprises (or is) one or more of glycerol,
propylene
glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, 1,3-
butylene glycol,
erythritol, meso-Erythritol, ethyl vanillate, ethyl laurate, a diethyl
suberate, triethyl
citrate, triacetin, a diacetin mixture, benzyl benzoate, benzyl phenyl
acetate,
tributyrin, lauryl acetate, lauric acid, myristic acid, and propylene
carbonate.
83. The aerosol-generating material or slurry of Embodiment 82, wherein the
aerosol-
generating agent comprises (or is) one or more of erythritol, propylene
glycol,
glycerol, and triacetin.
84. The aerosol-generating material or slurry of Embodiment 82 or 83, wherein
the
aerosol-generating agent comprises (or is) glycerol optionally in combination
with
propylene glycol.
85. The aerosol-generating material or slurry of any preceding Embodiment,
comprising less than about 10 wt% filler.
86. The aerosol-generating material or slurry of Embodiment 85, comprising
less than
about 5 wt% filler.
87. The aerosol-generating material or slurry of Embodiment 86, comprising
less than
about 1 wt% filler.
88. The aerosol-generating material or slurry of any of Embodiments 1 to 84,
comprising Ito 10 wt% filler.
89. The aerosol-generating material or slurry of Embodiment 88, comprising 1
to 5
wt% filler.
90. The aerosol-generating material or slurry of Embodiment 88, comprising 2
to 7
wt% filler.
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91. The aerosol-generating material or slurry of any of Embodiments 1 to 84,
comprising 3 to 10 wt% filler.
92. The aerosol-generating material or slurry of Embodiment 91, comprising 3
to 5
wt% filler.
5 93. The aerosol-generating material or slurry of any of Embodiments 85 to
92,
wherein the fillers are selected from inorganic filler materials, wood pulp,
hemp fibre,
cellulose and cellulose derivatives.
94. The aerosol-generating material or slurry of Embodiment 93, wherein the
aerosol-
generating material or slurry comprises no calcium carbonate such as chalk.
10 95. The aerosol-generating material or slurry of any of Embodiments 1 to
84, wherein
aerosol-generating material or slurry does not comprise filler.
96. The aerosol-generating material or slurry of any preceding Embodiment,
comprising additional active substances
97. The aerosol-generating material or slurry of any preceding Embodiment
further
15 comprising one or more other functional materials.
98. The aerosol-generating material or slurry of any preceding Embodiment,
wherein
the aerosol-generating material or slurry does not comprise fibrous material.
99. The aerosol-generating material or slurry of any preceding Embodiment,
wherein
the aerosol-generating material or slurry does not comprise tobacco fibres.
20 99A. The aerosol-generating material or slurry of any of Embodiments 1-
98, wherein
the aerosol-generating material or slurry comprises less than 1 wt% tobacco.
99B. The aerosol-generating material or slurry of any of Embodiments 1-98,
wherein
the aerosol-generating material or slurry comprises less than 0.5 wt% tobacco.
99C. The aerosol-generating material or slurry of any of Embodiments 1-98,
wherein
25 the aerosol-generating material or slurry does not comprise tobacco.
100. The aerosol-generating material or slurry of any preceding Embodiment,
further
comprising water.
101. An aerosol-generating composition comprising an aerosol-generating
material
according to any preceding Embodiment.
30 102. The aerosol-generating composition of Embodiment 101, further
comprising one
or more additional active substances and/or flavours, and optionally one or
more other
functional materials.
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103. The aerosol-generating composition of Embodiment 101 or 102 further
comprising one or more other functional materials.
104. The aerosol-generating composition of Embodiment 102 or 103, wherein the
other functional materials comprise one or more pH regulators, colouring
agents,
preservatives, binders, stabilisers, and/or antioxidants.
105. The aerosol-generating composition of any of Embodiments 101 to 104,
comprising from about 50-100 wt% (WWB) of the aerosol-generating material.
106. The aerosol-generating composition of Embodiment 105, comprising from
about 50-90 wt% (WWB) of the aerosol-generating material.
107. The aerosol-generating composition of Embodiment 105, comprising from
about 60-100 wt% (WWB) of the aerosol-generating material.
108. The aerosol-generating composition of Embodiment 107, comprising from
about 60-95 wt% (WWB) of the aerosol-generating material.
109. The aerosol-generating composition of Embodiment 107, comprising from
about 70-100 wt% (WWB) of the aerosol-generating material.
110. The aerosol-generating composition of Embodiment 109, comprising from
about 70-95 wt% (WWB) of the aerosol-generating material.
111. The aerosol-generating composition of Embodiment 110, comprising from
about 70-90 wt% (WWB) of the aerosol-generating material.
112. The aerosol-generating composition of any of Embodiments 101 to 104,
consisting of, or consisting essentially of the aerosol-generating material.
112A. The aerosol-generating composition of any of Embodiments 101 to 112,
wherein the composition comprises a carrier on which the aerosol-generating
material is provided.
112B. The aerosol-generating composition of Embodiment 112A, wherein the
carrier comprises a metal foil.
I I 2C. The aerosol-generating composition of Embodiment I I 2B, wherein the
carrier comprises an aluminium foil.
113. A consumable for use in a non-combustible aerosol provision device, the
consumable comprising the aerosol-generating composition of any of Embodiments
101-112.
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113A. The consumable of Embodiment 113, wherein the consumable does not
comprise tobacco.
113B. The consumable of Embodiment 113 to 113A, wherein the aerosol-generating
composition consists of the aerosol-generating material of any of Embodiments
1 to
100.
113C. The consumable of Embodiment 113 to 113B, wherein the consumable
comprises a single aerosol-generating composition.
114. A non-combustible aerosol provision system comprising the consumable of
Embodiment 113 and a non-combustible aerosol provision device.
115. The consumable for use in a non-combustible aerosol provision device of
Embodiment 113, or the non-combustible aerosol provision system of Embodiment
114, wherein the non-combustible aerosol provision device is a heat-not-burn
device.
116. The consumable for use in a non-combustible aerosol provision device of
Embodiment 113, or the non-combustible aerosol provision system of Embodiment
114, wherein the non-combustible aerosol provision device is an electronic
tobacco
hybrid device.
117. A method of forming an aerosol-generating material as defined in any of
Embodiments 1 to 25, 31 to 50 and 68 to 100, the method comprising
(a) providing a slurry comprising the gelling agent, aerosol-former material,
nicotine, acid, a solvent and any optional further components of the aerosol-
generating material;
(b) forming a layer of the slurry;
(c) optionally setting the layer of the slurry; and
(d) drying the slurry to form the aerosol-generating material.
118. A meihod of forming an aerosol-generating material as defined in any of
Embodiments 26 to 100, the method comprising
(a) providing a slurry comprising the gelling agent, aerosol-former material,
nicotine
salt, a solvent and any optional further components of the aerosol-generating
material;
(b) forming a layer of the slurry;
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(c) optionally setting the layer of the slurry; and
(d) drying the slurry to form the aerosol-generating material.
119. The method of Embodiment 117 or 118, wherein the solvent comprises water.
120. The method of Embodiment 117 or 118, wherein the solvent consists
essentially of, or consists of water.
121. The method of Embodiments 117 to 120 or the slurry of any of Embodiments
1
to 100, wherein the slurry comprises from about 50 wt%, 60 wt%, 70 wt%. 80 wt%
or 90 wt% of solvent (WVVB).
Examples
Exemplary and non-limiting formulation for aerosol-generating material
(AM) are provided in the table below.
Alginate CMC Glycerol Nicotine salt Cross-
linking
agent
AM1 - 54.55% 36.36% 9.09%
Nicotine -
lactate
AM2 - 54.55% 36.36% 9.09%
Nicotine -
benzoate
AM3 58.82% - 39.22% 1.96% Nicotine -
lactate
AM4 58.82% - 39.22% 1.96% Nicotine
Calcium
lactate formate
AM5 - 65.36% 32.68% 1.96%
Nicotine -
lactate
AM6 - 65.36% 32.68% 1.96%
Nicotine -
benzoate
AM7 - 62.60% 31.30% 6.10%
Nicotine -
lactate
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AM8 - 62.60% 31.30% 6.10%
Nicotine -
benzoate
AM9 54.05% - 36.04% 9.91% Nicotine -
lactate
AM10 54.05% - 36.04% 9.91% Nicotine
Calcium
lactate formate
AM11 - 47.00% 47.00% 5.99%
Nicotine -
lactate
AM12 - 47.00% 47.00% 5.99%
Nicotine -
benzoate
AM13 54.05% - 36.04% 9.91% Nicotine -
benzoate
AM14 54.05% - 36.04% 9.91% Nicotine
Calcium
benzoate formate
AM15 - 48.96% 48.96% 2.08%
Nicotine -
lactate
AM16 - 48.96% 48.96% 2.08%
Nicotine -
benzoate
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