HIGHLY HYGROSCOPIC SEA-ISLAND TYPE COMPOSITE FIBER, FIBER STRUCTURE, AND POLYESTER COMPOSITION

Title:

HIGHLY HYGROSCOPIC SEA-ISLAND TYPE COMPOSITE FIBER, FIBER STRUCTURE, AND POLYESTER COMPOSITION

Document Type and Number:

WIPO Patent Application WO/2019/176811

Kind Code:

A1

Abstract:

Provided is a highly hygroscopic sea-island type composite fiber having characteristics (1)-(4) below: (1) The island component in a polymer has hygroscopicity; (2) The ratio of the outermost layer thickness T to the fiber diameter R in a cross section of the fiber is 0.05-0.25; (3) The difference (ΔMR) in moisture absorption rate after hot water treatment is 2.0-10.0%; and (4) The content of a phenol group is 16-160 mmol/kg, wherein the outermost layer thickness is the difference between the radius of the fiber and the radius of a circumscribed circle connecting the vertices of the island component disposed at the outermost circumference, and represents the thickness of the sea component present in the outermost layer. Provided are a sea-island type composite fiber and a polyester composition, which have excellent hygroscopicity and good oxidation heat resistance.

Inventors:

MAKINO MASATAKA (JP)
NAKAGAWA JUNICHI (JP)
TANAKA YOICHIRO (JP)
MOCHIZUKI KATSUHIKO (JP)

Application Number:

PCT/JP2019/009491

Publication Date:

September 19, 2019

Filing Date:

March 08, 2019

Export Citation:

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Assignee:

TORAY INDUSTRIES (JP)

International Classes:

D01F8/14; C08K5/13; C08K5/53; C08L67/02; D01F1/10

Domestic Patent References:

WO2018012318A1	2018-01-18
WO2017114313A1	2017-07-06
WO2015146790A1	2015-10-01

Foreign References:

JPS47042048B1
JPS60217257A	1985-10-30
JP2010024328A	2010-02-04
JP2006104379A	2006-04-20
JP2001172374A	2001-06-26
JPH08198954A	1996-08-06
JP2003113311A	2003-04-18
JP2005200786A	2005-07-28
JPS58198527A	1983-11-18
JP2007100243A	2007-04-19
JP2011174215A	2011-09-08

Other References: