POLYESTER FILAMENT YARN, PROCESS FOR THE PRODUCTION THEREOF, WOVEN AND KNITTED FABRICS THEREOF, AND PROCESS FOR THE PRODUCTION THEREOF

摘要

A polyester filament yarn which is produced by subjecting a polyester filament comprising a core and a plurality of fins radiately projecting from the core along the lengthwise direction of the core and satisfying the following requirements (1) to (3) to weight reduction with alkali and in which at least part of the fins are present in a state separated from the core: (1) 1/20