LATENT CRIMPING POLYESTER CONJUGATE FIBER

摘要

PROBLEM TO BE SOLVED: To provide a polyester conjugate fiber having latent crimping property and suitable for stretchable woven or knit fabric having excellent stretchability and feeling and giving little fatigue in wearing. SOLUTION: This latent-crimping polyester conjugate fiber is a side-by-side or eccentric sheath-core conjugate fiber composed of (A) a polytrimethylene terephthalate free from trifunctional copolymerizing component and (B) a polytrimethylene terephthalate copolymerized with 0.05-0.2 mol% trifunctional copolymerizing component or (C) a polytrimethylene terephthalate having an intrinsic viscosity lower than that of the component A by 0.15-0.3.