| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyetherester fiber having excellent antioxidation stability, heat resistance, and further elasticity characteristics, dyeable to a clear color, and hardly causing deterioration in tensile strength and elasticity characteristics after dyeing. SOLUTION: The polyetherester fiber comprises a polyetherester composed of a main dicarboxylic acid component composed of terephthalic acid, and a main diol component composed of 1,3-propylene glycol and a polyalkylene ether glycol having a number-average molecular weight of 500-20,000 and having a copolymerization ratio of 35-80 wt.%. The polyetherester fiber satisfies following (1) to (5): (1) 1.0 dl/g≤reduced viscosity (ηsp/c)≤4.0 dl/g, (2) terminal carboxy group content≤20 milliequivalents/kg fiber, (3) copolymerization ratio of bis(3-hydroxypropyl)ether≤1.8 wt.%, (4) tensile strength≥0.3 cN/dtex, and elongation≥200%, and (5)≥70% elastic recovery after repeating 200% elongation 3 times in either case after a heat treatment at 140°C for 4 h or after a treatment in hot water at 95°C for 4 h, and≥60% holding ratio of the stress at 160% extension during the third shrinkage to the stress at 160% extension during the third extension. COPYRIGHT: (C)2009,JPO&INPIT
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