Patent ID: 6668535
Filing Date: 2003-12-30
Classification: D02G,Y10T

Abstract:
A method for producing a heat-resistant crimped yarn, which comprises:twisting heat-resistant high-functional fiber filaments to form a yarn, heat-setting the yarn through treatment with a high-temperature high-pressure steam or a high-temperature high-pressure water at a temperature between 130 and 250Â° C., and thereafter untwisting the yarn, to obtain the heat-resistant crimped yarn, wherein the heat-resistant high-functional fiber filaments are twisted to a twist parameter, K, represented by the following formula, of from 5,000 to 11,000, and are heat-set through treatment with the high-temperature high-pressure steam or the high-temperature high-pressure water at a temperature between 130 and 250Â° C.: K=tÃ—D1/2 wherein t indicates the count of twists (/m) of the filaments; and D indicates the fineness (tex) thereof.