Patent ID: 9045589
Filing Date: 2015-06-02
Classification: B60C,C08G,D01D,D01F,D02G,D10B

Abstract:
1. A drawn polyethylene terephthalate (PET) fiber including 90 mol % or more of PET, of which the crystallinity is 53% or more, the amorphous orientation factor (AOF) is 0.15 or less, and the birefringence index is 0.14 to 0.16, after heat-treating the same at 230° C. for 1 minute under the initial load of 20 g/1000 d, wherein the drawn PET fiber is obtained by drawing an undrawn PET fiber at a draw ratio of 0.1 to 1.55, and wherein the undrawn PET fiber has an AOF of 0.15 or less.