Poly (phenylene sulfide) fibers and production process thereof

Details Poly (phenylene sulfide) fibers and production process thereof Poly (phenylene sulfide) fibers and production process thereof

D - Textiles, Paper

01

F

18/617

D01F 6/76 (2006.01) D02J 1/22 (2006.01) D02J 13/00 (2006.01)

Patent

CA 2038615

- 46 - Disclosed herein are poly(phenylene sulfide) fibers having a tensile strength of at least 3.5 g/d, a knot tenacity of at least 2 g/d, a loop tenacity of at least 3.5 g/d, the number of abrasion cycles until breaking in a flexing abrasion test of at least 3,000 times, and the number of repeated flexings until breaking in a flexural fatigue test of at least 150 times. A process for the production of poly(phenylene sulfide) fibers, which comprises melt-spinning a poly(phenylene sulfide), stretching the resultant unstretched filaments at a draw ratio of 2:1 to 7:1 within a temperature range of 80- 260°C, and heat-treating the stretched filaments for 0.1- 30 seconds under conditions of a take-up ratio of 0.8:1 to 1.35:1 in a dry heat atmosphere exceeding 285°C, but not exceeding 385°C, is also disclosed.

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