Hydrophilic polyester fiber and hydrophilic nonwoven fabric using the same and their production

摘要

A hydrophilic polyester fiber is supplied with an aqueous mixed dispersion on the surface and made hydrophilic by being heated at 35 DEG C or higher, and the aqueous mixed dispersion employed contains a polyester-polyether block copolymer composed of a polyester component and a polyether component and is stable at lower than 35 DEG C and precipitates the polyester-polyether block copolymer when its dispersion state is broken by being heated to 35 DEG C or higher.