Polyphenylene sulfide fiber and nonwoven fabric

Abstract

Provided are a polyphenylene sulfide fiber including a PPS resin as a main component and having both excellent heat resistance and excellent thermal bonding properties, and a nonwoven fabric including the fiber. The polyphenylene sulfide fiber includes polyphenylene sulfide as a main component and having the sum of the crystallinity and the rigid amorphous fraction of 30% to 90%. The crystallinity is preferably not less than 5% and less than 25%. The polyphenylene sulfide fiber is used to form a nonwoven fabric. The nonwoven fabric is preferably produced by consolidation by thermal bonding or mechanical entanglement.

1 . A polyphenylene sulfide fiber comprising polyphenylene sulfide as a main component and having the sum of the crystallinity and the rigid amorphous fraction of 30% to 90%. 
     
     
         2 . The polyphenylene sulfide fiber according to  claim 1 , wherein the crystallinity is not less than 5% and less than 25%. 
     
     
         3 . A nonwoven fabric comprising the polyphenylene sulfide fiber according to  claim 1 . 
     
     
         4 . The nonwoven fabric according to  claim 3 , which is produced by consolidation by thermal bonding or mechanical entanglement.