Fabric (woven – knitted – or nonwoven textile or cloth – etc.) – Coated or impregnated woven – knit – or nonwoven fabric which... – Coating or impregnation is water absorbency-increasing or...
Patent
1997-10-14
2000-06-13
Raimund, Christopher
Fabric (woven, knitted, or nonwoven textile or cloth, etc.)
Coated or impregnated woven, knit, or nonwoven fabric which...
Coating or impregnation is water absorbency-increasing or...
442155, 427308, 427324, 4273899, 427392, B32B 904
Patent
active
060749644
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a fabric comprising cellulose fibers, and more particularly to a fabric exhibiting excellent hygroscopicity and pliable handling touch, and to a production process therefor.
The present invention as relates to a fabric comprising cellulose fibers and polyester fibers and exhibits hygroscopicity that is equivalent or superior to that of a fabric composed of cellulose fibers, and pliable handling touch, and to a production process therefor.
The present invention relates to a fabric exhibiting excellent shape memory and pliable handling touch, and to a production process therefor.
BACKGROUND ART
Cellulose fiber is known as typical fiber having hygroscopicity, and advanced hygroscopicity thereof is demanded to improve comfort in recent years. A fabric including cellulose fibers and polyester fibers suffers from unsatisfactory hygroscopicity as compared with the fabric including cellulose fibers. Therefore, improved hygroscopicity of the fabric composed of mixed-spun yarns of cotton/polyester is demanded to improve comfort.
To improve the hygroscopicity, it might be considered feasible to employ a modifying process in which hydrophilic vinyl monomers are graft-polymerized with the fabric. The foregoing technique however encounters handling touch of the fabric being stiff because of compounds prepared due to the graft polymerization and left among fibers in a large quantity.
On the other hand, a process for causing a fabric composed of cellulose fibers or a fabric including cellulose fibers to have shape memory has been a resin process using fiber reactant type resin or formaldehyde vapor.
However, to realize satisfactory shape memory, resin needs be supplied in a large quantity. In the foregoing case, there arises a problem in that the handling touch of the fabric becomes stiff. To overcome the foregoing problem, a variety of softening agents has been usually employed. The obtained softening effect however has unsatisfactory.
As disclosed in Japanese Patent Laid-Open No. 7-189135 (1995), a method has been suggested in which a sewed product is subjected to a process for causing the product to have shape memory by using formaldehyde vapor and cellulase is used to process the product. The foregoing method however encounters a difficulty in uniformly enzyme-treating the sewed product, thus resulting in the quality of the sewed product being deteriorated excessively and the strength of the fabric being locally and critically weakened. Moreover, special apparatuses need be provided to perform the process for causing the sewed product to have shape memory and the enzyme process. Therefore, the foregoing method cannot easily be employed.
DISCLOSURE OF THE INVENTION
According to one aspect of the present invention, there is provided a fabric comprising cellulose fibers, comprising hydrophilic vinyl monomers graft-polymerized with the cellulose fibers, wherein ratio B/W of bending rigidity (B) measured by KES (Kawabata Evaluation System) and weight (W) is 0.0001 or higher and 0.005 or lower.
The foregoing fabric is cellulose fiber fabric having improved hygroscopicity and pliable handling touch, each of which cannot be obtained from a conventional cellulose fiber fabric.
We have provided a process for producing a fabric, comprising the step of reducing the weight of a fabric including cellulose fibers before or after the fabric is subjected to a graft polymerization process, in which the fabric is subjected to an impregnation process using a water solution containing hydrophilic vinyl monomers and a polymerization initiator and subjected to heat treatment.
According to another aspect of the present invention, there is provided a fabric comprising cellulose fibers and polyester fibers, comprising hydrophilic vinyl monomers graft-polymerized with the cellulose fibers, wherein the ratio B/W of bending rigidity (B) measured by KES (Kawabata Evaluation System) and weight (W) is 0.0001 or higher and 0.005 or lower.
The foregoing fabric has excellent hygroscopicity equival
Amano Jiro
Hara Toshinori
Okutani Shinichi
Miller Austin R.
Raimund Christopher
Toray Industries Inc.
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