POLYESTER BLENDED MULTIFILAMENT YARN AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To obtain a polyester blended multifilament yarn capable of giving woven/knitted fabrics with sufficient puffiness and soft touch through simultaneously manifesting three-dimensional crimps and self-elongation and also manifesting crimps in a core yarn by heat treatment under dyeing and fishing operation. SOLUTION: This polyester blended multifilament yarn comprising a sheath yarn (a) and a core yarn (b) and having 0.5-5 slack(s) and/or loop(s)/cm on the whole yarn surface is characterized by that the sheath yarn (a) consists of a multifilament yarn manifesting three-dimensional crimps 2-10% in stretch elongation (CS) and >=60% in stretch elongation recovery (CD) and simultaneously manifesting self-elongation at 0-10% in the yarn axial direction by dry heat treatment at >=130 deg.C or heat treatment equivalent thereto, and the core yarn (b) consists of a polyester multifilament yarn exhibiting shrinkage at >=10% and at the same time manifesting the number of crimps at 2-10/cm by the above heat treatment.