Conjugate fiber and method of producing same

摘要

A poly(trimethylene terephthalate)-based conjugate fiber characterized in that the fiber is composed of single filaments which are combined with two polyester components in a side-by-side manner or an eccentric sheath-core manner, that at least one of the two polyester components forming the single filaments is a poly(trimethylene terephthalate), and that the fiber satisfies the following conditions:(1) the stretch elongation of crimp manifested prior to boiling water treatment is 20% or less;(2) the breaking elongation is from 25 to 100%; and(3) the maximum stress value of a dry heat shrinkage stress is from 0.01 to 0.24 cN/dtex.