Cationic dyeable polyester fiber and composite fiber

• Main Authors: NAKATSUKA, HITOSHI, OKA, KAZUHIDE, OHGA, DAISUKE, KAWAKADO, SHINYA, TANAKA, KAZUHIKO
• Format: Patent
• Language: Chinese; English
• Published: 16.10.2012
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; CHEMISTRY; COMPOSITIONS BASED THEREON; CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, ORYARNS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MECHANICAL FINISHING OF YARNS OR ROPES; MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS; METALLURGY; NATURAL OR ARTIFICIAL THREADS OR FIBRES; ORGANIC MACROMOLECULAR COMPOUNDS; SPINNING; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; WARPING OR BEAMING; YARNS; YARNS OR THREADS

The present invention provides polyester fibers, which comprise copolymer polyesters (B). The polyester fibers are characterized in that the copolymer polyesters (B) comprise dicarboxylic acid units and glycol units, which 75 mole% or more of the dicarboxylic acid units are terephthalic acid units, 1.0 mole% to 3.5 mole% are units (a) derived from the compound represented by following formula (I), 2.0 mole% to 10.0 mole% are cyclohexanedicarboxylic acid units (b), and 2.0 mole% to 8.0 mole% are aliphatic dicarboxylic acid units (c). Thus, polyester fibers, which show a color having a high density towards cationic dyes and disperse dyes in ordinary pressure environment, have excellent washing fastness and light fastness, and can be ensuring of good spinnability, can be obtained.