COMPOSITION DE FIBRES DE CELLULOSE

CELLULOSE FIBRE COMPOSITION

Abrégé français

L'invention porte sur une composition cellulosique comprenant des fibres ayant une longueur de fibre moyenne pondérée (« LWAFL ») de 0,25 à 0,40 mm.

Abrégé anglais

A cellulosic composition comprising fibres having a length weighted average fibre length ("LWAFL") of 0.25 to 0.40mm.

Revendications

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CLAIMS:
1. A cellulosic composition comprising fibres having a
length weighted average fibre length ("LWAFL") of 0.25 to
0.40mm.
2. A cellulosic composition as claimed in claim 1, the
composition comprising, by weight:
(a) 15% to 25% fibres of a length weighted average
fibre length of 0.001 mm to 0.2 mm;
(b) 40% to 60% fibres of a length weighted average
fibre length of 0.2 mm to 0.5 mm;
(c) 8% to 35% fibres of a length weighted average
fibre length of 0.5 mm to 1.2 and
(d) less than 3% fibres of a length weighted average
fibre length of 1.2 mm to 2.0 mm.
3. A cellulosic composition comprising, by weight:
(a) 15% to 25% fibres of a length weighted average
fibre length of 0.001 mm to 0.2 mm;
(b) 40% to 60% fibres of a length weighted average
fibre length of 0.2 mm to 0.5 mm;
(c) 8% to 35% fibres of a length weighted average
fibre length of 0.5 mm to 1.2 and
(d) less than 3% fibres of a length weighted average
fibre length of 1.2 mm to 2.0 mm.
4. A cellulosic composition as claimed in any one of the
preceding claims, wherein the composition has a Water
Retention Value (WRV) of 600% to 2000%.
5. A cellulosic composition as claimed in any one of the
preceding claims, wherein the composition comprises, by
weight:
(a) 15% to 25% fibres of a length weighted average
fibre length of 0.001 mm to 0.2 mm;




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(b) 45% to 55% fibres of an a length weighted
average fibre length of 0.2 mm to 0.5 mm;
(c) 20% to about 30% fibres of a length weighted
average fibre length of 0.5 mm to 1.2 mm and
(d) less than 1% fibres of a length weighted average
fibre length of 1.2 mm to 2.0 mm.
6. A cellulosic composition as claimed in any one of the
preceding claims, wherein the cellulosic composition is in
the form of pellets, granules or powder.
7. A cellulosic composition as claimed in any one of the
preceding claims, wherein the composition also comprises
one or more functional additives.
8. A cellulosic composition as claimed in claim 7,
wherein the functional additives are selected from dyes
and pigments for colouring, resins and waxes for
waterproofing, lime, fire retardants including natron,
silicate, glues, metal powders and graphites for
electrical conductivity, latex for flex and waterproofing,
fillers and very long fibres of 1.5-6.0mm in length for
increased tensile strength.
9. A cellulosic composition as claimed in any one of the
preceding claims, wherein the composition is prepared by
any one or combination of processing methods including
ultra friction grinding, high pressure homogenizing, cryo
grinding, extrusion, steam explosion, ultra sonic
treatment, enzyme-fibre separation, high
consistency/medium consistency/low consistency refining,
chemical treatment or whitewater fines recovery.
10. A cellulosic composition as claimed in any one of the
preceding claims, wherein components of the composition
are prepared separately and mixed together.



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11. A cellulosic composition as claimed in claim 10,
wherein two or more intermediary compositions with
different fibre length distributions are prepared and
mixed in the required proportions to form the composition.
12. A cellulosic composition as claimed in any one of the
preceding claims, wherein the raw material used in the
preparation of the compositions comprises one or more of
short/ultra short cellulose fibres/fines recovered from
waste streams, recovered paper, recovered fines in
whitewater from paper & pulp processing and recovered
cotton fibres, any cellulosic fibres used in pulp & paper
processing and plant fibres having a high cellulosic
content such as hemp, flax, cotton, abaca, sisal and jute.
13. A product made from a composition as claimed in any
one of the preceding claims..
14. A product as claimed in claim 13, wherein the density
of the product is from 0.5 g/cm3 to 1.5 g/cm3.
15. A product as claimed in claim 13 or 14, wherein the
tensile modulus of the product is from 3500 MPa to 10800
MPa.
16. A product as claimed in any one of claims 13-15,
wherein the tensile strength of the product is from 27 MPa
to 115 MPa.

Description

CA 02815386 2013-04-22
Rid Ut & maybeeLLP
CANADA'S INIELLECTUAL PROPERTY AND TECHNOLOGY LAW FIRM
Charles Boulakia
Direct Dial: (416) 865-3518
Industry Industrie
E-mail: cboulakia@ridoutmaybee.com Canada Canada A/M/J
Y/M/D
2013/04/22
1 11, 111 113 13
April 22, 2013
D002152944
CIPO OPIC
The Commissioner of Patents
CIPO, Patent Office
Ottawa-Gatineau, Canada, KlA 0C9
Attention: BOX PCT - NATIONAL PHASE
Dear Sir/Madam:
Re: Entry into National Phase in Canada
International Application No. PCT/AU2011/001360
International Filing Date: October 26, 2011
Applicant: Zeo IP Pty Ltd
Title: CELLULOSE FIBRE COMPOSITION
Our File: 49799-3001
We request that this international application be entered into the National
Phase in
Canada.
We enclose:
1. Request for Entry into National Phase under Article 22 or 39 of the
Patent
Cooperation Treaty;
2. Entitlement Declaration as required by Section 37 of the Patent Rules;
and
3. R4flacement page 1, correcting typographical error in the title.
Priority Request
The applicant requests priority in respect of the application on the basis of
the
following:
Country of Filing Application Number Filing Date
Australia 2010904775 October 26, 2010
.../2
225 KING STREET WEST, 10TH FLOOR, TORONTO, ONTARIO, CANADA M5V 3M2
7: 416.868 1482, F: 416.362.0823 ridbee@ridoutmaybee.corn www.ridoutmaybee.com

TORONTO I OTTAWA I MISSISSAUGA

= CA 02815386 2013-04-22
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CELLULOSE FIBRE COMPOSITION
Technical Field
The disclosure relates to cellulosic compositions
that are useful as structural building components for
objects including, but not limited to, buildings,
furniture, car parts, coffins, cabinets & cases,
electronic housing, structural building pillars, beams,
boards, sheets, veneers, chairs, musical instruments, and
toys.
Background
Large amounts of waste generated in the pulp and
paper processing industry are typically disposed to
landfill. Disposal to landfill, however, is becoming
increasingly problematic due to the environmental
constraints associated with land availability and
land/soil contamination. As such, there is significant
pressure to reduce the amount of waste disposed to
landfill, one means of reduction being recycling.
Recycling of paper and textile materials requires the
breakdown of such materials into fibres or fibre-like
material which may then be reformed into material to
provide paper and paper-like products. As an alternative
to reforming into material to provide paper and paper-like
products, a recycling process has previously been
developed for producing moulded pieces out of cellulose
fibres in which the specific gravity of the moulded pieces
approaches that of pure cellulose, 1.5. The process
involves finely chopping and grinding cellulose fibres in
the presence of water into micro-fibres prior to forming a
fibre-water mixture in which the cellulose fibre content
is about 1-15% by weight. The process subsequently
involves shaping and drying the mixture of cellulose
fibres and water into the moulded pieces. Details of the
process and the moulded pieces produced by the process are
set out in US Patent No. 6,379,594.

Dessin représentatif