| 摘要 |
PROBLEM TO BE SOLVED: To prepare a melt-blown nonwoven fabric comprising a polyarylene sulfide, high in tensile strength and having excellent toughness even in a state enhanced in crystallinity in addition of excellent heat resistance, chemical resistance, etc. SOLUTION: This polyarylene sulfide melt-blown nonwoven fabric has an average fineness of <=10.0μm and is produced by melt-blowing a polyarylene sulfide having a melt viscosity of 100-2,000Pa.s at 310 deg.C and at a shear rate of 100/sec and having a (η30 /η5 ) ratio of 0.70-1.00. The η5 is a melt viscosity measured at a shear rate of 100/sec, after the polymer is held at 330 deg.C for 5min. The η30 is a melt viscosity measured at a shear rate of 100/sec, after the polymer is held at 330 deg.C for 30min. |
