Patent ID: 9011743
Filing Date: 2015-04-21
Classification: C09K,D01D,D01F,D02J,D06M,Y10T

Abstract:
1. A method for producing liquid crystal polyester fibers which comprises: forming liquid crystal polyester fibers into a package, subjecting said fibers to solid-phase polymerization, unrolling from said package solid-phase polymerized liquid crystal polyester fibers, and without further taking up into a package, successively heat treating said solid-phase polymerized liquid crystal polyester fibers, wherein the temperature of said heat treatment is controlled at a temperature of an endothermic peak temperature (Tm1) of said solid-phase polymerized liquid crystal polyester fibers+60° C. or higher, and a speed of said fibers before and after heat treatment is regulated, respectively, by a first roller and a second roller.