Title of Invention

"A PROCESS FOR PRODUCING DYED GARMENTS CONSTRUCTED FROM LYOCELL FABRIC"

Abstract Garments are constructed from lyocell fabric which has been resignated using a textile resin having just two groups per molecule which can reactively cross-link with cellulose molecules of the lyocell fabric then causticised by application under tension of an aqueous solution of sodium hydroxide, and the constructed garments are dyed in a garment dyeing operation. Garments can be produced by this route which retain a smooth, evently-dyed appearance with unpuckered seams and minimal creasing and so present a desired formal look, as distinct from the casual look imparted by the effects of fibrillation normally produced when lyocell garments undergo garment dyeing.
Full Text Garments are constructed from lyocell fabric which has been resignated using a textile resin having just two groups per molecule which can reactively cross-link with cellulose molecules of the lyocell fabric then causticised by application under tension of an aqueous solution of sodium hydroxide, and the constructed garments are dyed in a garment dyeing operation. Garments can be produced by this route which retain a smooth, evently-dyed appearance with unpuckered seams and minimal creasing and so present a desired formal look, as distinct from the casual look imparted by the effects of fibrillation normally produced when lyocell garments undergo garment dyeing.






WE CLAIM:
1. A process for producing dyed garments constructed from
lyocell fabric comprising the steps of:
(a) applying to a lyocell fabric a textile resin
having two groups only per molecule which can
reactively cross-link with cellulose molecules of
the lyocell fabric;
(b) drying the fabric and heating it to effect the
resin cross-linking reaction,
(c) causticising the resinated lyocell fabric by
applying to it an aqueous solution of sodium
hydroxide, and
(d) dyeing the resinated, causticised, lyocell fabric,
characterised by:
causticising the fabric in step (c) by applying the aqueous solution of sodium hydroxide whilst the fabric is under tension and by constructing the fabric into garments after step (c), and carrying out step (d) as a garment dyeing operation.
2. A process as claimed in claim 1, wherein the garments
are dyed with a reactive dye.
3. A process as claimed in claim 1 or 2, wherein the
lyocell fabric has the textile resin applied to it in open
width.
4. A process as claimed in any preceding claim, wherein
the textile resin is a zero-formaldehyde resin.
5. A process as claimed in any of claims 1 to 3, wherein
the textile resin is a formaldehyde containing resin.
6. A process as claimed in claim 5, wherein the textile
resin is a urea-formaldehyde resin.
7. A process as claimed in any preceding claim, wherein
the lyocell fabric comprises lyocell fibres only or lyocell
fibres in blend with synthetic fibres and the causticising
of the fabric is carried out with an aqueous solution
comprising 9 to 16 per cent by weight of sodium hydroxide.
8. A process as claimed in any of claims 1 to 6, wherein
the lyocell fabric comprises lyocell fibres in blend with
cotton or linen fibres and the causticising of the fabric is
carried out with an aqueous solution comprising 20 to 34 per
cent by weight of sodium hydroxide.
9. A process as claimed in any preceding claim, wherein
the dyed garments are treated with a soft finish before
being dried.
10. A process as claimed in any preceding claim, wherein
the fabric is made up into blouses or shirts for smart
office wear or trousers or pleated or unpleated shirts for
smart wear, whereby the resulting dyed garments have a
formal look.

Documents:

1117-delnp-2003-abstract.pdf

1117-DELNP-2003-Assignment-(25-03-2011).pdf

1117-delnp-2003-claims.pdf

1117-delnp-2003-complete specification (as filed).pdf

1117-delnp-2003-complete specification (granted).pdf

1117-DELNP-2003-Correspondence Others-(25-03-2011).pdf

1117-delnp-2003-correspondence-others.pdf

1117-delnp-2003-correspondence-po.pdf

1117-delnp-2003-description (complete).pdf

1117-DELNP-2003-Form-1-(25-03-2011).pdf

1117-delnp-2003-form-1.pdf

1117-delnp-2003-form-13.pdf

1117-delnp-2003-form-18.pdf

1117-DELNP-2003-Form-2-(25-03-2011).pdf

1117-delnp-2003-form-2.pdf

1117-delnp-2003-form-3.pdf

1117-delnp-2003-form-5.pdf

1117-DELNP-2003-GPA-(25-03-2011).pdf

1117-delnp-2003-gpa.pdf

1117-delnp-2003-pct-210.pdf

1117-delnp-2003-pct-304.pdf

1117-delnp-2003-pct-409.pdf


Patent Number 249438
Indian Patent Application Number 1117/DELNP/2003
PG Journal Number 42/2011
Publication Date 21-Oct-2011
Grant Date 19-Oct-2011
Date of Filing 17-Jul-2003
Name of Patentee LENZING AKTIENGESELLSCHAFT
Applicant Address WERKSTRASSE 2, 4860 LENZING, AUSTRIA
Inventors:
# Inventor's Name Inventor's Address
1 TAYLOR, JAMES MARTIN 42 LINACRES DRIVE, CHELLASTON, DERBY DE73 1XH, U.K
2 COLLINS, GEOFFREY WILLIAM 7 BURNHAM DRIVE, MICKLEOVER, DERBY DE3 5QZ, U.K
PCT International Classification Number D06P
PCT International Application Number PCT/GB2002/00287
PCT International Filing date 2002-01-23
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 0101815.9 2001-01-24 U.K.