| 摘要 |
PROBLEM TO BE SOLVED: To provide a core-sheath type conjugated polyester fiber hardly causing a reduction in fiber strength and shrinkage after heat treatment to provide a woven/knitted fabric or the like having good dimensional stability, and hardly causing a reduction in adhesive power and deformation even when the obtained product is used in a high-temperature atmosphere to enable the fiber to be used in various kinds of applications, and to provide the woven or knitted fabric using the fiber at least as a part thereof. SOLUTION: The core-sheath type conjugated polyester fiber includes a polyester A consisting essentially of an alkylene terephthalate unit and having a melting point of≥220°C, and a polyester B having a melting point≥30°C lower than that of the polyester A, and is obtained by arranging the polyester A at the core part and the polyester B at the sheath part. The mass ratio (core:sheath) of the core part to the sheath part is (40:60) to (80:20), and the strength retention after dry heat treatment and the shrinkage, represented by the formula: strength retention (%) =(G/M)×100; and shrinkage (%) =ä(MS-GS)/MS}×100 are≥60% and≤20%, respectively. COPYRIGHT: (C)2008,JPO&INPIT
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