Patent ID: 9150689
Filing Date: 2015-10-06
Classification: C08G,C08K,D01D,D01F,Y10T

Abstract:
1. A flame retardant polyester fiber, comprising the unit structure represented by the following Chemical Formula 2 in the main chain thereof, wherein an orientation factor of a crystal region is from 0.85 to 0.97, an orientation factor of an amorphous region is from 0.15 to 0.50, a birefringence index is from 0.1 to 0.2, a crystallinity is from 40 to 55%, a limited oxygen index is from 27 to 37, a melting temperature is 235° C. or more, an intrinsic viscosity is from 0.75 to 1.05, a b value of the color tone is 7.0 or less, a strength is 6.0 g/d or more, a shrinking ratio, which is measured by Testrite under the conditions of 190° C., 15 min, 0.01 g/d, is 8.0% or less, and a fineness of the fiber is from 4.0 to 5.5 denier, wherein R