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Title:
POLYURETHANE ELASTIC FIBER, YARN PACKAGE OF SAME, AND PRODUCT INCLUDING SAME
Document Type and Number:
WIPO Patent Application WO/2019/078170
Kind Code:
A1
Abstract:
Provided is a polyurethane elastic fiber wherein surface treating agents do not bleed even after lengthy storage, thereby preventing contamination of packing material, and which exhibits stable friction performance independent of storage duration, making the fiber suitable for a stable gathered member with low occurrence of core slip-back. This polyurethane elastic fiber is a multifilament polyurethane elastic fiber and is characterized by having, in the multifilament cross section, a void part demarcated by the constituent individual filaments being in contact with one another and by having a cross-sectional void part area ratio of 15% to 60% as calculated according to the formula (cross-sectional void part area ratio [%])=100×(area of the void part)/(total cross-sectional area), where the total cross-sectional area is the sum of the area of the void part and the cross-sectional areas of all individual filaments that constitute the multifilament.

Inventors:
SATO HITOSHI (JP)
YAMAMOTO TARO (JP)
Application Number:
PCT/JP2018/038363
Publication Date:
April 25, 2019
Filing Date:
October 15, 2018
Export Citation:
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Assignee:
ASAHI CHEMICAL IND (JP)
International Classes:
D03D15/56; D01F6/70
Domestic Patent References:
WO2014092088A12014-06-19
WO2015125753A12015-08-27
Foreign References:
JP2015206150A2015-11-19
JP2016035122A2016-03-17
JP2628502B21997-07-09
JP2016211131A2016-12-15
JP2002519528A2002-07-02
US5007193A1991-04-16
US6492021B12002-12-10
JP2016035122A2016-03-17
KR20040033331A2004-04-28
CN1542182A2004-11-03
JPH10310979A1998-11-24
Other References:
GOTO, HACHIRO: "Spandex-polyurethane elastic yarn", KOBUNSHI, vol. 12, no. 1, 1963, pages 20 - 26, XP055596877
HATTA KIYOSHI, KINARI TOSHIYASU, SHINTAKU SUKENORI, IWAKI NOBUO: "Effect of Yarn Cross Section on Air Drag for Spandex Yarn", JOURNAL OF THE TEXTILE MACHINERY SOCIETY OF JAPAN, vol. 45, no. 1, 1 January 1999 (1999-01-01), JP , pages 6 - 12, XP093075518, ISSN: 0040-5043, DOI: 10.4188/jte1955.45.6
RINKE H.: "Elastomeric Fibers Based on Polyurethane", ANGEWANDTE CHEMIE INTERNATIONAL EDITION IN ENGLISH, vol. 1, no. 8, 1 August 1962 (1962-08-01), DE , pages 419 - 424, XP009546851, ISSN: 0570-0833, DOI: 10.1002/anie.196204191
GOTO, HACHIRO: "Spandex-polyurethane elastic yarn", POLYMER, vol. 12, no. 1, 1 January 1963 (1963-01-01), pages 20 - 26, XP055596877
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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