Process to prepare polymeric fibers with improved color and appearance

摘要

The use of a sulfonated salt polyester ionomer resin in a colored, drawn polyamide or polyester fiber results in improved color strength and appearance. Sodium sulfo isophthalate polybutylene terephthalate copolymers when melt blended with colorants and subsequently used to make melt spun synthetic polyamides or polyesters fibers are shown to enhance color strength in drawn fibers.