THERMO-ADHESIVE POLYESTER CONJUGATE FIBER AND FIBER STRUCTURE COMPOSED THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a thermo-adhesive conjugate fiber giving a fiber structure having excellent elasticity, durability and soft feeling compared with conventional fiber structure composed of a general-purpose PET and a thermo-adhesive conjugate fiber containing a thermoplastic elastomer without increasing the production cost. SOLUTION: The objective polyester conjugate fiber is composed of a polyether ester-type block copolymer (E) containing a hard segment component consisting of a polytrimethylene terephthalate polyester and a soft segment component consisting of a poly(alkylene oxide) glycol having an average molecular weight of 400-5,000 and a polytrimethylene terephthalate polyester (P) having a melting point higher than that of the block copolymer by >=10 deg.C. The areal ratio of E:P on the cross-section of the fiber is 20:80 to 80:20 and the block copolymer E is arranged to be exposed at least on the surface of the fiber.