Fusible polyurethane elastic fiber and a manufacturing method thereof, as well as knitted fabric woven with the use of the polyurethane elastic fiber

摘要

PPROBLEM TO BE SOLVED: To obtain a heat-fusible polyurethane elastic fiber hardly causing fray by wet-heat treatment and a woven or knitted fabric hardly causing fray, etc., by using a composite yarn such as a single covering yarn in which the polyurethane elastic fiber is used as a core yarn and the circumference of the yarn is covered with an inelastic yarn. PSOLUTION: In a method for knitting a single covering yarn, the heat-fusible polyurethane elastic fiber has a thermal fusion force at 120°C for 20 seconds of ≥0.30cN/dtex. PCOPYRIGHT: (C)2007,JPO&INPIT