Wound Yard Body of Water Absorbent Polyester Fiber and Method for Manufacturing Same
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United States of America Patent
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Nov 7, 2019
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Dec 28, 2016
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Dec 28, 2016
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Abstract
A wound yarn body of a water-absorbent polyester fiber having a water absorbency under JIS L1907: 2010 falling-drop method after being washed 30 times under JIS L0217: 1995 103 C method of 5 seconds or less, the wound yarn body being characterized in that the deposition amount of white powder containing a cyclic oligomer that is the decomposition product of polyester constituting the water-absorbent polyester fiber is less than 0.3 wt %; and a method for manufacturing the wound yarn body that includes a process for applying alkali reduction to a polyester fiber containing 0.005-1 wt % of an element S at reduction rate of a 0.6-9% against the polyester fiber.
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