Water-repellent woven or knitted article, production method for same, and garment
AssigneeToray Industries, Inc.
InventorsKeigo Toyabe, Kazuya Fujita
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AssigneeToray Industries, Inc.
InventorsKeigo Toyabe, Kazuya Fujita
Estimating the term…
The present invention provides a water-repellent woven or knitted article that overcomes the problems of the related art and exhibits water-repellent properties and is excellent in abrasion resistance and durability. The water-repellent woven or knitted article of the present invention is a woven or knitted article subjected to a water repellent treatment using a water repellent having a perfluorooctanoic acid (PFOA) concentration of 5 ng/g or less, wherein the woven or knitted article includes, as constituent fibers, fibers having a transverse cross-sectional shape, each fiber has a plurality of grooves at an outer circumference of the transverse cross section, each groove has a wide part, and a size of the grooves in the fibers satisfies the following Formulae (Formula 1) and (Formula 2): w2/w1≥1.3 (Formula 1) 0.15≤h/d≤0.25 (Formula 2) where w1 represents a groove entrance width, w2 represents a groove wide part width, h represents a groove depth, and d represents a diameter of the fiber, a droplet contact angle between the woven or knitted article and water is 135° or more after 20 times of washing in accordance with a method of JIS L 0217 103 and a water repellency is grade 4 or more in accordance with a spray method of JIS L 1092.
A water-repellent woven or knitted article that is a woven or knitted article subjected to a water repellent treatment using a water repellent having a perfluorooctanoic acid concentration of 5 ng/g or less, wherein the woven or knitted article includes, as constituent fibers, fibers having a transverse cross-sectional shape, each fiber has a plurality of grooves at an outer circumference of the transverse cross section, each groove has a wide part, and a size of the grooves in the fibers satisfies the following Formulae (Formula 1) and (Formula 2):
A water-repellent woven or knitted article that is a woven or knitted article with a water repellent attached, wherein the water repellent contains only a fluorine-based water repellent composed of a fluorine compound having a perfluoroalkyl group having 6 or less carbon atoms or a non-fluorine-based water repellent, and the woven or knitted article includes, as constituent fibers, fibers having a transverse sectional shape, each fiber has a plurality of grooves at an outer circumference of the transverse cross section, each groove has a wide part, and a size of the grooves in the fibers satisfies the following Formulae (Formula 1) and (Formula 2):
Dependencies are inferred from the claim text.