Patent ID: 6620502
Filing Date: 2003-09-16
Classification: B65H,D01F,Y10T

Abstract:
A polytrimethylene terephthalate fiber composed of 90 mol % or more of trimethylene terephthalate repeating units and satisfying the following conditions defined in (A) to (E):(A) a density is in a range from 1.320 to 1.340 g/cm3 (B) a birefringence is in a range from 0.030 to 0.070 (C) a peak value of thermal stress is in a range from 0.01 to 0.12 cN/dtex (D) a boiling water shrinkage is in a range from 3 to 40%, and (E) an elongation at break is in a range from 40 to 140%.