Note: Descriptions are shown in the official language in which they were submitted.
1 Selective hair removal, for e~ample for the shaping of eye
brows, is very dif~icult and can be painful.
This is generally accomplished by tweezing or plucking
because the use of depilatories it too difficult to control for
use where shaping of the hair line is desired.
Attempts have been made to use hot wax for hair removal
and shaping. This, however, can be painful and in addition re-
quires professional application.
Generally speaking in accordance with the present invention,
a pressure sensitive adhesive is applied to a face of a sheet material
of predetermined shape. The adhesive composition includes a high
molecular wax-like substance. The sheet material is applied in
the desired shape and at the desired place to the area from which
undesired hair is to be removed and pressed against the same.
The adhesive with the high molecular substance therein adheres
firmly to the hair and a quick peeling motion of the strip results
in the removal of the hair which adheres to the adhesive on the
sheet material.
It is accordingly a primary object of the present invention
to provide an arrangement which can be used for the removal of un-
wanted hair in selected spots without the removal of wanted hair.
It is another object of the present invention to provide an
arrangement for removing unwanted hair and shaping hair line under
controlled conditions with minimum pain and without removal of
wanted hair.
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It is yet a further object of the present invention
to provide a method and composition for achieving the removal
of hair and the shaping of hair line.
Other objects and advantages of the present invention
will be apparent from further reading of the specification and
of the appended claims.
With the above and other objects in view, the present
invention mainly comprises shaped strips of sheet material
having a pressure sensitive adhesive composition applied to a
face thereof, said composition including a high molecular
substance, the composition adhering more firmly to hair than
to skin so that when the material is applied to the hair and
skin and then pulled from the same only hair is removed.
More particularly, the present invention provides an
arrangement for the removal of unwanted hair, comprising a
plastic sheet material of predetermined shape and size having
a pressure sensitive adhesive composition comprising a high
molecular weight polymer selected from the group consisting
of polymers of natural rubber, butyl rubber, butadiene styrene,
block styrene, ethylene vinyl acetate, vinyl acetate, ethyl
cellulose and natural waxes in an amount of about 9-10% by
weight, a tackifier selected from the group consisting of ter-
penes, rosin derivatives, coumarone indene, hydrocarbon resins
and terpene phenolics and mixtures thereof in an amount of
about 65 to 68.5% by weight, a softener selected from the
group consisting of mineral o.il, liquid rosin derivatives,
lanolin, dibutyl phthalate, dioctyl phthalate and tricresyl
phosphate in an amount of about 21.5-25.5% by weight, and
an antioxidant selected from the group consisting of 2,2-
methylene-bis-(4-methyl-6-tertiary butyl)-phenol, 1, 3,
6~
5-triethyl-2, 4, 6-tris (3, 5-ditertiary butyl-4-hydroxy
benzyl)-benzene, butylated hydroxy anisole and butylated
hydroxy toluol in an amount of about 0.5% by weight applied
to a face thereof. This composition adheres firmly to
hair but not to skin so that when the same is applied to
an area of the body from which it is desired to remove
unwanted hair, and subsequently peeled away therefrom, only
the unwanted hair is removed.
The sheet material may be of plastic, paper, cell-
ophane, etc. In accordance with the invention the sheet
material is made in various sizes and shapes with curves in
different places, inward curves, outward curves, etc. so that
the different pieces of the sheet material can be applied to
different areas. For example, pieces of sheet material having
an outward curve can be used for the removal of hair below
the eye brow. Strips of material having an inward curve can
be used for removal of hair above the eye brow. Different
shapes can be used for the removal of hair between the eye
brows, etc.
The shaped sheet materials containing the adhesive
composition of the present invention can be used for the removal
of brow hair very quickly, without the time consuming and painful
plucking or messy hot waxing previously used, and the use thereof
minimizes
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1 brow line errors because of the preshaping to ~it any brow line.
The pressure sensitive adhesive composition applied to
a face of the sheet material of predetermined size and shape should
have the following properties:
1. Sufficient tack or stickiness to adhere firmly to
the hair, without, however, adhering firmly to the skin.
2. Sufficient cohesiveness to pull out the hair without
the adhesive splitting from the sheet material.
3. Stickiness or tackiness remaining for a sufficient
time to permit normal storage.
The adhesive compositions are prepared of (a) a wax or
high molecular weight polymer (for cohesion), (b) tackifiers to
provide stickiness, (c) softeners such as mineral oil, etc. to
adjust the degree of softness and tack, (d) modifiers such as
antioxidants to minimize aging.
The composition could also include fillers to control
liquid flow, etc.
Most waxes and thermoplastic polymers may be used to make
the pressure sensitive adhesive, including natural rubber, butyl
rubber, butadiene styrene, block styrene, ethylene vinyl acetate,
polyvinyl acetate, ethyl cellulose, natural waxes, etc.
The tackifiers include terpenes, rosin derivatives, coumarone
indene, hydrocarbon resins, terpene phenolics, etc.
Softeners include mineral oils, liquid rosin derivatives,
lanolin, plasticizers such as dibutyl phthalate, dioctyl phthalate,
tricresyl phosphate, etc.
1 Suitable antioxidants include: 2,2~methylene-bis-(4-
methyl-6-tertiary butyl)-phenol; 1,3,5-triethyl-2,4,6-tris(3,5-
ditertiary butyl-4-hydroxy benzyl)-benzene; butylated hydroxy anisole;
butylated hydroxy toluol; etc.
The adhesive cornposition may be applied to the shaped sheet
material, e.g. cellophane, polyethylene, paper, etc. in any suitable
manner.
Thus, for example, all of the ingredients of the adhesive
composition can be melted together and applied hot to the face of the
shaped sheet material in hot melted condition and there cooled.
Another method of application is the solvent solution method
in which the ingredients are dissolved in a mutual solvent or blend
of solvents, applied to the sheet material and dried.
Still another method of application is the emulsion method
in which the materials are dispersed in an emulsion, applied to the
sheet material and dried.
The shaped strips are utilized according to the invention by
pressing the shaped sheet material to the area of the body from which
it is desired to remove unwanted hair while avoiding application to
wanted hair, for example around the eye brow, and pressed firmly onto
the skin. The skin is then pulled taut and with a ~uick motion the
strip if peeled off against the direction of the hair growth. This
results in removal of the unwanted hair only while the wanted hair
24 remains ~ollowing the coutour of the selected strip.
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1 The following examples are given to illustrate the present
invention. The scope of the invention is not, however, meant to
be limited to the specific details of the examples.
_xample 1
An adhesive composition is prepared of the following com-
ponents in the proportions given, all amounts being in parts by
weight:
glycerol ester of hydrogenated rosin68.0
block styrene polymer 10.0
mineral oil 21.5
antioxidant O5
100. 0
The above composition is hot melted together and applied
to a sheet of clear plastic cut to predetermined shape. After
cooling, a paper backing is applied onto the adhesive.
When it is desired to use the strip, the paper backing is
removed from the clear plastic coated strip, the plastic strip is
applied to the hair that is to be removed, adhesive face against
the hair, and pressed firmly onto the skin. The skin is pulled
taut and with a quick motion the strip is pulled off from the skin.
This results in removal of the hair only on the predetermined
portion o~f the skin covered with the strip. The entire operation
is painless.
1 Example 2
An adhesive composition is prepared of the following
components:
terpene resin softening pt, ~5.C65.0
block styrene polymer 9.0
liquid glycerol ester o~ hydrogenated rosin 25.5
antioxidant 5
100.O
The composition is applied and used in the same manner
as in Example 1.
Example 3
An adhesive is prepared of the following components:
glycerol ester of hydrogenated rosin 48.5
pentaerythritol ester of hydrogenated rosin 20.0
block styrene polymer 9.0
mineral oil 22.0
antioxidant 5
100.O
This composition is dissolved in a solvent mixture of
naptha and toluol and applied to a clear plastic strip o~ poly-
ethylene. The solvent mixture is evaporated and the further pro-
cedure is as set forth in Example 1.
While the invention has been illustrated in particularwith respect to speci~ic compositions, it is apparent that
variations and modifications of the invention can be made.
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