POLYESTER FIBER, WOVEN KNIT FABRIC, CAR SHEET AND PROCESS FOR PRODUCING POLYESTER FIBER

摘要

A polyester fiber of 15 to 38 cN/dtex initial tensile resistance degree, 70% or higher elongation recovery ratio exhibited after 20% elongation and 0.3 to 1.4% shrink release ratio exhibited after dry heat treatment at 160°C. From this polyester fiber, there can be obtained a woven knit fabric being resistant to cyclic loading, excelling in surface softness and uniformity properties and being free from unevenness or curling. The woven knit fabric from the polyester fiber is highly resistant to cyclic loading, so that it is suitable for use in a car sheet to which a human body weight is applied.