FALSE TWIST YARN OF POLYESTER COMPOSITE FIBER AND METHOD FOR PRODUCTION THEREOF

摘要

A false twist yarn of polyester composite fiber, characterized in that the composite fiber comprises a single yarn prepared through side-by-side type or eccentric sheath-core type lamination of two types of polyester components, at least one component of the two types polyester components is polytrimethylene terephthalate, the difference between the intrinsic viscosities of the two types of polyester components is 0.05 to 0.9 (dl/g), the yarn has the latent crimping property, and the crimp being manifested before the treatment with boiling water exhibits an elongation by stretch of 50 % or more.