HIGHLY HYGROSCOPIC SEA-ISLAND TYPE COMPOSITE FIBER, FIBER STRUCTURE, AND POLYESTER COMPOSITION
申请人:Toray Industries, Inc.
公开号:EP3767017A1
公开(公告)日:2021-01-20
Provided is a highly hygroscopic sea-island type composite fiber having characteristics (1)-(4) below: (1) The island component in a polymer has hygroscopicity; (2) The ratio of the outermost layer thickness T to the fiber diameter R in a cross section of the fiber is 0.05-0.25; (3) The difference (ΔMR) in moisture absorption rate after hot water treatment is 2.0-10.0%; and (4) The content of a phenol group is 16-160 mmol/kg, wherein the outermost layer thickness is the difference between the radius of the fiber and the radius of a circumscribed circle connecting the vertices of the island component disposed at the outermost circumference, and represents the thickness of the sea component present in the outermost layer. Provided are a sea-island type composite fiber and a polyester composition, which have excellent hygroscopicity and good oxidation heat resistance.
本发明提供了一种高吸湿性海岛型复合纤维,它具有以下特性(1)-(4):(1)聚合物中的海岛成分具有吸湿性;(2)纤维横截面上最外层厚度 T 与纤维直径 R 之比为 0.05-0.25;(3)热水处理后的吸湿率差值(ΔMR)为 2.0-10。0%;(4)酚基的含量为16-160mmol/kg,其中最外层厚度为纤维的半径与连接设置在最外周的海岛组分顶点的圆周半径之差,代表存在于最外层的海岛组分的厚度。本发明提供了一种海岛型复合纤维和一种聚酯组合物,它们具有优异的吸湿性和良好的抗氧化耐热性。