CRIMPED POLYESTER YARN, METHOD FOR PRODUCING THE SAME, AND WOVEN OR KNITTED FABRIC USING COMPOSITE YARN WITH THE CRIMPED YARN

摘要

PROBLEM TO BE SOLVED: To provide a crimped polyester yarn capable of imparting moderate fullness feeling, body and stiffness, and repulsive feeling though having excellent drapeability of a cellulosic multifilament yarn when converted into a composite yarn, to provide a method for producing the yarn, and to provide a woven or a knitted fabric thereof.;SOLUTION: The crimped polyester yarn has: a single filament fineness (D) of 1.5 dtex≤D≤12 dtex; a Young's modulus (Y) of 7,000 N/mm²≤Y≤12,000 N/mm²; a snarl value of not less than 45; a fabric degree of bulkiness of not less than 0.8 cm³/g; and a bulk compressive modulus of elasticity of not less than 80% after a boiling water treatment at a compressive stress of 125 g/cm². The method for producing the yarn includes carrying out false-twist texturing under a false-twist twisting tension (T) of 0.15 g/dtex≤T≤0.5 g/dtex, and at a twist multiplier (K1) of 7,000≤K1≤20,000 when carrying out draw-false twist texturing of an undrawn polyester yarn having a birefringence (Δn) of 30×10^-3≤Δn≤80×10^-3; subsequently carrying out a tensioning treatment at a temperature below the glass transition temperature (Tg) of the polymer under a yarn running tension (T') of 0.1 g/dtex≤T'≤1.0 g/dtex; and then winding the yarn. The woven or the knitted fabric is obtained by using the composite yarn of the resultant crimped polyester yarn with cellulosic fibers.;COPYRIGHT: (C)2010,JPO&INPIT