POLYAMIDE-BASED POLYMER ALLOY FIBER AND PRODUCTION THEREOF

摘要

PURPOSE:To obtain the title fiber useful as a material for separator of battery, having excellent hydrophilic nature, dyeability and chemical resistance by subjecting a specific polyamide-based polymer alloy to melt spinning at a specific temperature and drawing. CONSTITUTION:A polyamide-based polymer alloy dispersing granular polyolefin having <5mum diameter in an aliphatic polyamide and having 15-200 melt flow rate at 290 deg.C is subjected to melt spinning at the melting point +10 deg.C to less than 360 deg.C and drawn at >=2 draw ratio to give the aimed fiber comprising the aliphatic polyamide as a sea component and the polyolefin as an island component having <5mum diameter in section of fiber.