| 摘要 |
PROBLEM TO BE SOLVED: To provide a water-absorbing/quick-drying polyester conjugate fiber excellent in water-absorbing/quick-drying property and washing durability, also excellent in dyed color fastness, fibril-proof property and strength. SOLUTION: This sheath core type polyester conjugate fiber is provided by having grooves like microspores in parallel to fiber axis direction on the surface of the fiber, a fiber specific surface area formed by the microspores within a specific range, 2-5 flatness in a cross section W and the grooves of continued microspores along fiber length at least at a recessed part of the cross section, and containing 0.05-2.0% polyethylene glycol in the fiber. The method for producing the polyester conjugate fiber is provided by forming a sheath component of the sheath core type conjugate fiber by a polyester obtained by blending a specific copolyester A with a polyester B, then performing an alkali reduction treatment under a specific condition to form the grooves like microspores in parallel to the fiber axis direction on the fiber surface and at the same time the continuous grooves along the fiber length at the recessed part of the fiber cross section. COPYRIGHT: (C)2008,JPO&INPIT |
