| Crimped filament-containing woven or knitted fabric manifesting roughness upon wetting with water, process for producing the same and textile products made therefrom -> Monitor Keywords |
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  Crimped filament-containing woven or knitted fabric manifesting roughness upon wetting with water, process for producing the same and textile products made therefromUSPTO Application #: 20070270067Title: Crimped filament-containing woven or knitted fabric manifesting roughness upon wetting with water, process for producing the same and textile products made therefrom Abstract: A woven or knitted fabric, having a roughness which is manifested when wetted with water and disappears when dried, comprises crimped filaments A whose percentage of crimp decrease when wetted with water, and filaments B composed of non-crimped filaments and/or crimped filaments which undergo substantially no change in percentage of crimp when wetted with water, wherein the change of the roughness is 5% or more, determined in accordance with the following equation: Change in Roughness (%)=((TW−TD)/TD)×100 in which TD: a thickness upon drying and TW: a thickness upon wetting with water, of the woven or knitted fabric. (end of abstract) Agent: Sughrue Mion, PLLC - Washington, DC, US Inventors: Satoshi Yasui, Takeshi Yamaguchi, Masato Yoshimoto, Shigeru Morioka USPTO Applicaton #: 20070270067 - Class: 442189000 (USPTO) Related Patent Categories: Fabric (woven, Knitted, Or Nonwoven Textile Or Cloth, Etc.), Woven Fabric (i.e., Woven Strand Or Strip Material), Including Strand Which Is Of Specific Structural Definition The Patent Description & Claims data below is from USPTO Patent Application 20070270067. Brief Patent Description - Full Patent Description - Patent Application Claims
FIELD OF THE INVENTION [0001] The present invention relates to a crimped filament-containing woven or knitted fabric which manifests roughness upon wetting with water, to a process for producing the same, and to textile products prepared therefrom. More particularly, the present invention relates to a woven or knitted fabric which comprises crimped filaments the percentage of crimp of which decreases upon wetting with water and filaments other than the crimped filaments, and has a performance such that the surface of the woven or knitted fabric manifests a roughness upon wetting with water and the roughness decreases or disappears upon drying, whereby clothes produced from the woven or knitted fabric do not cling or hardly cling to the skin even when wetted by perspiration, as well as to a process for producing the same and to textile products prepared therefrom. BACKGROUND ART [0002] When sportswear or underwear produced from woven or knitted fabrics comprising conventional fibers or natural fibers is worn, there is a known problem such that when the wearer sweats, the conventional fabrics are unpleasantly close and sticky on the skin due to the sweat. [0003] Against vaporized sweat generated in the initial stage of perspiration, it has become common to employ clothes produced from fibers with high hygroscopicity as the constituent materials of clothes, or clothes formed from woven or knitted fabrics having a loose structure and a low density in order to increase the air permeability. [0004] On the other hand, for liquid sweat generated during the middle and later stages of perspiration, there have been proposed multi-ply structured woven or knitted fabrics having a difference in density between the outside ply and inside ply (skin side) of the woven or knitted fabrics to allow sweat absorbed in the skin side ply to rapidly migrate to the outside ply (for example, see Patent Reference 1), and to use clothes formed from woven or knitted fabrics having a roughness formed on the skin side surface of woven or knitted fabrics to decrease the contact area between the skin and clothes and to decrease the degree of stickiness (for example, see Patent documents 2 and 3). However, in the former case, perspiration exceeding the saturated moisture absorption of the clothes results in residue of sweat on the skin side, causing the clothes to stick to the skin. In the latter case, where the surface roughness of the clothes is insufficient, perspiration in a large amount causes the clothes to stick to skin, and when the extent of roughness is increased in order to avoid the sticking, the air content of the woven or knitted fabric increases resulting in higher heat retention and thereby aiding perspiration, while the convexities of the roughness also rub against the skin producing an uncomfortable prickling feel, and are also abraded on the skin tending to create pilings. [0005] It has therefore been desired to develop woven and knitted fabrics which can reduce such stickiness by reversibly manifesting roughness on the woven or knitted fabric surface when wetted with water. [0006] Patent document 1: Japanese Unexamined Patent Publication No. 9-316757 [0007] Patent document 2: Japanese Unexamined Patent Publication No. 10-131000 [0008] Patent document 3: Japanese Unexamined Patent Publication No. 9-324313 DISCLOSURE OF THE INVENTION [0009] An object of the present invention is to provide a woven or knitted fabric which manifests roughness on the surface when wetted with water in such a manner that the roughness is reduced or disappears upon drying, as well as a process for producing it and textile products obtained therefrom which do not become uncomfortable upon wetting by sweat produced by perspiration. [0010] This object is achieved by the crimped filament-containing woven or knitted fabric of the present invention, the process for producing it and textile products therefrom. [0011] The crimped filament-containing woven or knitted fabric of the present invention which manifests roughness upon wetting with water, and comprises yarns comprising crimped filaments A the percentage of crimp of which decreases upon wetting with water, and yarns comprising filaments B comprising at least one type of filaments selected from non-crimped filaments and crimped filaments which undergo substantially no change in percentage of crimp upon wetting with water, [0012] is characterized in that the change in roughness calculated by the equation: Change in Roughness (%)=((TW-TD)/TD).times.100 wherein TD represents a thickness of the woven or knitted fabric measured after standing it in an environment having a temperature of 20.degree. C. and a humidity of 65% RH for 24 hours and TW represents a largest thickness of the water-wetted portion of the woven or knitted fabric measured one minute after 1 ml of water has been dropped onto the woven or knitted fabric, is 5% or greater. [0013] In the crimped filament-containing woven or knitted fabric of the present invention which manifests roughness upon wetting with water, the crimped filaments A are preferably selected from crimped conjugate filaments comprising a polyester resin component and a polyamide resin component which components are different from one another in terms of water-absorption and self-elongation properties, and bonded to one another in a side-by-side structure, the conjugate filaments having crimps formed by revealing the latent crimpability of the conjugate filaments. [0014] In the crimped filament-containing woven or knitted fabric of the present invention which manifests roughness upon wetting with water, the polyester resin component preferably comprises a modified polyethylene terephthalate resin comprising 5-sodiumsolfoisophthalic acid copolymerized in an amount of 2.0-4.5 molar percent based on the content of the acid component of the resin. [0015] In the crimped filament-containing woven or knitted fabric of the present invention which manifests roughness upon wetting with water, the yarn comprising the crimped filaments A is preferably twisted at the number of twist of 0-300 T/m. [0016] In the crimped filament-containing woven or knitted fabric of the present invention which manifests roughness upon wetting with water, the filaments B preferably comprises a polyester resin. [0017] In the crimped filament-containing woven or knitted fabric of the present invention which manifests roughness upon wetting with water, the fabric preferably at least one portion Y composed entirely of the crimped filaments A and at least one portion Z composed entirely of the filaments B, the Z portion being formed continuously in either or both the warp and weft directions or in either or both the course and wale directions of the woven or knitted fabric. [0018] The crimped filament-containing woven or knitted fabric of the present invention which manifests roughness upon wetting with water may comprise at least one portion Z composed entirely of the filaments B and at least one portion X composed of the filaments A and the filaments B, the Z portion being formed continuously in either or both the warp and weft directions or in either or both the course and wale directions of the woven or knitted fabric. [0019] The crimped filament-containing woven or knitted fabric of the present invention which manifests roughness upon wetting with water may comprise at least one portion X composed of the crimped filaments A and the filaments B and at least one portion Y composed entirely of the crimped filaments A, the X portion being formed continuously in either or both the warp and weft directions or in either or both the course and wale directions of the woven or knitted fabric. [0020] The crimped filament-containing woven or knitted fabric of the present invention which manifests roughness upon wetting with water, may comprise at least one portion X composed of the crimped filaments A and the filaments B, at least one portion Y composed entirely of the crimped filaments A and at least one portion Z composed entirely of the filament B, the Z portion being formed continuously in either or both the warp and weft directions or in either or both the course and wale directions of the woven or knitted fabric. [0021] The crimped filament-containing woven or knitted fabric of the present invention which manifests roughness upon wetting with water may have a multi-ply weave or knit structure with two or more plies, at least one ply of the multi-ply structure being composed of the crimped filaments A and the filaments B, while at least one other ply being composed entirely of the filaments B, and the ply containing the filaments A and B and the other ply containing the filaments B being partially bound with each other. Continue reading... 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