Patent ID: 8652977
Filing Date: 2014-02-18
Classification: B32B,D01F,D04H,Y10T

Abstract:
1. A heat-resistant nonwoven fabric wherein the nonwoven fabric is formed from a poly(phenylene sulfide) fiber, the poly(phenylene sulfide) fiber has a crystallinity of 25 to 50%, the poly(phenylene sulfide) fiber is a filamentary fiber having a fiber diameter of 1 to 30 μm, the poly(phenylene sulfide) fiber shows no melting peak in the temperature range of 85 to 240° C. when the melting peak is measured with a differential scanning calorimeter at a heating rate of 20° C./min, the nonwoven fabric is a spun-bonded nonwoven fabric that is integration bonded by thermal adhesion, the shrinkage at 180° C. of the heat-resistant nonwoven fabric is 3% or less and the tensile strength per unit fabric weight is 0.2 (N/cm)/(g/m 2 ) or more, and wherein the nonwoven fabric has not been subjected to treatment of dimensional stabilization against heat.