COMPOSITE FIBER, COMPOSITE MIXED-FILAMENT FIBER INCLUDING SAME, WOVEN/KNITTED FABRIC, AND GARMENT

Title:

COMPOSITE FIBER, COMPOSITE MIXED-FILAMENT FIBER INCLUDING SAME, WOVEN/KNITTED FABRIC, AND GARMENT

Document Type and Number:

WIPO Patent Application WO/2022/158310

Kind Code:

A1

Abstract:

The present invention comprises a polyester thermoplastic resin A and a polyester thermoplastic resin B, and satisfies the following conditions (1) through (4) in order to provide: a composite fiber that satisfies both stretch performance and wear resistance characteristics, and exhibits a delicate carded-wool feeling that is closer to wool, a deep natural appearance, and a satisfying feel; as well as a garment and woven/knitted fabric including said composite fiber. (1) The difference (MA – MB) between the weight-average molecular weight MA of the polyester thermoplastic resin A and the weight-average molecular weight MB of the polyester thermoplastic resin B is 2000-15000. (2) In the composite fiber, the apparent thick-thin ratio (Dthick/Dthin) of the composite fiber is 1.05-3.00. (3) In a cross-section of the composite fiber, the polyester thermoplastic resin B covers the thermoplastic resin A, and the ratio (tmin/D) of the minimum value tmin of the thickness t of the thermoplastic resin B to the fiber diameter D of the composite fiber is 0.01-0.10. (4) The circumferential length Ct of the portion of the cross-section of the composite fiber in which the thickness t satisfies the expression 1.00 tmin≤t≤1.05 tmin is Ct≥0.33 in relation to the circumferential length C of the total composite fiber.

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Inventors:

NAKAMICHI SHINYA (JP)
INADA KOJIRO (JP)
MATSUURA TOMOHIKO (JP)
MASUDA MASATO (JP)

Application Number:

PCT/JP2022/000301

Publication Date:

July 28, 2022

Filing Date:

January 07, 2022

Export Citation:

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Assignee:

TORAY INDUSTRIES (JP)

International Classes:

D01F8/14

Domestic Patent References:

WO2003093547A1	2003-11-13
WO2018110523A1	2018-06-21
WO2018110523A1	2018-06-21

Foreign References:

JPH09228181A	1997-09-02
JP2003239153A	2003-08-27
JP2004218156A	2004-08-05
JP2003328248A	2003-11-19
JP2011174215A	2011-09-08
JP2011208313A	2011-10-20
JP2012136804A	2012-07-19
JPH09157941A	1997-06-17

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