Patent ID: 8900413
Filing Date: 2014-12-02
Classification: D04H,D21H,H01B

Abstract:
1. A nonwoven fabric comprising a polyphenylene sulfide fiber, the nonwoven fabric being obtained by a process for papermaking, the polyphenylene sulfide fiber comprising an undrawn polyphenylene sulfide fiber, the amount of the undrawn polyphenylene sulfide being 30% to 70% by mass relative to the total amount of the nonwoven fabric, more fusion bonding occurring on a front side of the nonwoven fabric and less fusion bonding occurring on a back surface of the nonwoven fabric, both of a front and a back surface of the nonwoven fabric having a water contact angle in the range of 70° and 110°, wherein the water contact angle is measured by a method complied with JIS R 3257 (1999) “6. Sessile Drop Method” and having the front surface with the water contact angle greater than that of the back surface of the nonwoven fabric by 5° or more.