Kuraray Co., Ltd.

Shinya Kawakado

Hitoshi Nakatsuka

Takayuki Ikeda

Shoji Onogi

Kazuhiko Tanaka

Eriko Takahashi

Yasunori Murate

Kazuhide Oka

Daisuke Ohga

Shoji Sueyoshi

The present invention relates to a composite fiber for obtaining a fiber having a strength at 100% elongation of 0.04 cN/dtex or less,

Composite fiber

A modified ethylene-vinyl alcohol copolymer fiber includes an ethylene-vinyl alcohol copolymer containing 0.1 to 10 mol % of a modified component and 5 to 55 mol % of ethylene, and has a crystallinity of 25% to 50%.

Modified ethylene-vinyl alcohol copolymer fibers

A fiber made of a polyester copolymer (B), wherein the polyester copolymer (B) comprises a dicarboxylic acid component and a glycol component, and the dicarboxylic acid component comprises 75 mol % or more of a terephthalic acid component, 1.0 mol % to 3.5 mol % of component (a) derived from a compound represented by formula (I), 2.0 mol % to 10.0 mol % of a cyclohexane dicarboxylic acid component (b), and 2.0 mol % to 8.0 mol % of an aliphatic dicarboxylic acid component (c). This can afford a polyester fiber that exhibits deep color property to cation dyes and disperse dyes under a normal pressure environment and is superior in color fastness to washing and color fastness to light and can secure good spinnability.

Cationic-dyeable polyester fiber and conjugated fiber

Growing community of inventors

Kurashiki, Japan

Shinya Kawakado