POLYESTER HIGHLY SHRINKABLE CONJUGATED FIBER

• Main Authors: OZAWA FUMIO, TAKEGUCHI SHOHEI
• Format: Patent
• Language: English
• Published: 08.08.2003
• Edition: 7
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING; TEXTILES

PROBLEM TO BE SOLVED: To provide a polyester conjugated fiber having a high heat shrinkage percentage and excellent latent crimpability and suitable for affording a sun yarn for woven or knitted fabrics and nonwoven fabrics having excellent softness and stretchability. SOLUTION: This polyester highly shrinkable conjugated fiber is composed of a polyester A comprising polyethylene terephthalate as a main constituent component and prepared by copolymerizing an aromatic dicarboxylic acid having a metal sulfonate group in an amount of 3-7 mol% based on the whole acid component and a polyester B in which a main repeating unit is ethylene terephthalate. The difference between the polyester A and the polyester B in melting point is ≥5°C and the difference between the polyester A and the polyester B in heat of melting is ≥20 J/g. The dry heat shrinkage percentage at 170°C is ≥15%. COPYRIGHT: (C)2003,JPO