Hygro materials for use in making yarns and fabrics

Patent metadata

Field	Value
Publication number	US-9677205-B2
Application number	US-201414529172-A
Country	US
Kind code	B2
Filing date	Oct 31, 2014
Priority date	Oct 17, 2005
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

A process is described wherein pile yarn is woven with cotton weft and warp yarns to produce terry fabrics, such as towels. The fabric is then washed in warm water to dissolve the PVA fibers. The amount of fibers dissolved, depends upon the count of the yarn or yarns used. By dissolving the PVA fibers, a hollow air space is produced throughout the pile yarn, corresponding to an increase in the air space in the pile yarn. By increasing the air space in the pile yarn, the resulting towels are softer and bulkier than standard cotton towels. The present invention further relates to pile yarn in terry woven fabric (warp yarn), or weft yarn, in the case of flat fabrics.

First claim

I claim:

1. A method for making a towel, comprising:
(a) forming a plurality of slivers comprising,
(i) a first sliver made from one of cotton; blends of polyester and cotton; blends of polyester and viscose; blends of cotton and modal; blends of cotton; silk and modal; blends of cotton and bamboo; blends of cotton and sea weed fibers; blends of cotton and silver fibers; blends of cotton and charcoal fibers; and any combination thereof, and
(ii) a water-soluble sliver made from water-soluble fibers comprising polyvinyl alcohol fibers;

(b) forming a roving from the plurality of slivers, comprising forming a twist in the roving by wrapping the plurality of slivers such that the water-soluble sliver forms a core of the roving, and such that a sheath is formed around the core, the sheath comprising the first sliver;
(c) spinning the roving into a spun yarn;
(d) using the spun yarn as a pile yarn in weaving a terry fabric; and
(e) dissolving the water-soluble fibers in the pile yarn of the terry fabric;
(f) wherein the terry fabric absorbs three times its weight in water after being immersed in water.

2. The method of claim 1 , wherein the amount of polyvinyl alcohol fibers present in the pile yarn before the polyvinyl alcohol fibers are dissolved is from about 8% to about 25% by weight of the pile yarn.

3. The method of claim 1 , wherein the pile yarn consists of the sheath surrounding a hollow space extending throughout the pile yarn resulting from the dissolving of the water-soluble fibers.

4. A method for making a towel, comprising:
(a) forming a plurality of slivers comprising,
(i) a first sliver made from one of cotton; blends of polyester and cotton; blends of polyester and viscose; blends of cotton and modal; blends of cotton; silk and modal; blends of cotton and bamboo; blends of cotton and sea weed fibers; blends of cotton and silver fibers; blends of cotton and charcoal fibers; and any combination thereof, and
(ii) a water-soluble sliver made from water-soluble fibers comprising polyvinyl alcohol fibers;

(b) forming a roving from the plurality of slivers, comprising forming a twist in the roving by wrapping the plurality of slivers such that the water-soluble sliver forms a core of the roving, and such that a sheath is formed around the core, the sheath comprising the first sliver;
(c) spinning the roving into a spun yarn;
(d) using the spun yarn as a pile yarn in weaving a terry fabric; and
(e) dissolving the water-soluble fibers in the pile yarn of the terry fabric;
(f) wherein a drop of water is completely absorbed by the terry fabric, leaving only a wet spot, in less than five seconds under absorbency testing method AATCC-79 of the American Association of Textile Chemists and Colorists.

5. The method of claim 4 , wherein the amount of polyvinyl alcohol fibers present in the pile yarn the polyvinyl alcohol fibers are dissolved is from about 8% to about 25% by weight of the pile yarn.

6. The method of claim 4 , wherein the pile yarn consists of the sheath surrounding a hollow space extending throughout the pile yarn resulting from the dissolving of the water-soluble fibers.

7. A method for making a towel, comprising:
(a) forming a plurality of slivers comprising,
(i) a first sliver made from one of cotton; blends of polyester and cotton; blends of polyester and viscose; blends of cotton and modal; blends of cotton; silk and modal; blends of cotton and bamboo; blends of cotton and sea weed fibers; blends of cotton and silver fibers; blends of cotton and charcoal fibers; and any combination thereof, and
(ii) a water-soluble sliver made from water-soluble fibers comprising polyvinyl alcohol fibers;

(b) forming a roving from the plurality of slivers, comprising forming a twist in the roving by wrapping the plurality of slivers such that the water-soluble sliver forms a core of the roving, and such that a sheath is formed around the core, the sheath comprising the first sliver;
(c) spinning the roving into a spun yarn;
(d) using the spun yarn as a pile yarn in weaving a terry fabric; and
(e) dissolving the water-soluble fibers in the pile yarn of the terry fabric;
(f) wherein the terry fabric absorbs 65-75% of water in accordance with ASTM D-4772.

8. The method of claim 7 , wherein the amount of polyvinyl alcohol fibers present in the spun yarn before the polyvinyl alcohol fibers are dissolved is from about 8% to about 25% by weight of the spun yarn.

9. The method of claim 7 , wherein the pile yarn consists of the sheath surrounding a hollow space extending throughout the pile yarn resulting from the dissolving of the water-soluble fibers.

Assignees

• Welspun India Ltd

Inventors

• Mandawewala Rajesh R

Classifications

• D02G3/22

  Yarns or threads characterised by constructional features {, e.g. blending, filament/fibre (piecing of yarns or threads D01H15/00)} · CPC title

• Y10T428/239

  Complete cover or casing · CPC title

• D03D27/08

  Terry fabrics · CPC title

• B32B5/024

  Woven fabric · CPC title

• D10B2101/20

  Metallic fibres · CPC title