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Title:
RECYCLED POLYURETHANE ELASTIC FIBER, METHOD OF PRODUCING SAME, FIBER STRUCTURE CONTAINING SAID RECYCLED POLYURETHANE ELASTIC FIBER, GATHER MEMBER, AND SANITARY MATERIAL
Document Type and Number:
WIPO Patent Application WO/2021/060292
Kind Code:
A1
Abstract:
Provided are: a recycled polyurethane elastic fiber that can be used for diverse purposes despite being a recycled item; a method of producing same; a fiber structure containing said recycled polyurethane elastic fiber; a gather member; and a sanitary material. The present invention pertains to a recycled polyurethane elastic fiber for which raw-material polyurethane elastic fiber is used as a raw material, wherein the recycled polyurethane elastic fiber is characterized in that the recycled polyurethane elastic fiber has a reduced viscosity of 1.00 or more, and the total amount of mineral oil and silicone oil remaining in the fiber interior after the recycled polyurethane elastic fiber has been rinsed with petroleum ether is 10 wt% or less with respect to the fiber weight after the rinsing. The present invention also pertains to: a method of producing the recycled polyurethane elastic fiber; a fiber structure containing said recycled polyurethane elastic fiber; a gather member; and a sanitary material.

Inventors:
IWANAMI TAISUKE (JP)
Application Number:
PCT/JP2020/035846
Publication Date:
April 01, 2021
Filing Date:
September 23, 2020
Export Citation:
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Assignee:
ASAHI CHEMICAL IND (JP)
International Classes:
D01F6/70
Domestic Patent References:
WO1997000982A11997-01-09
WO2014112588A12014-07-24
Foreign References:
CN101096781A2008-01-02
JPH08246238A1996-09-24
JP2002538314A2002-11-12
CN101760799A2010-06-30
JP2017519121A2017-07-13
CN106757490A2017-05-31
CN108517580A2018-09-11
JP4731048B22011-07-20
Other References:
See also references of EP 4036288A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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