| abstract |
The present invention provides a kind of sheath-core type conjugate fiber, and the core component and sheath composition of the fiber are crystalline polymer, and core component is hygroscopic polymer；At least part of core component is exposed on surface on the cross section of the sheath-core type conjugate fiber, and cross-sectional circumference R long with expose the length summation r in the core component of surface portion s Ratio r s / R is 0.05~0.40；The extrapolation melt initiation temperature degree of the sheath-core type conjugate fiber is more than 150 DEG C, and hydroscopicity difference △ MR after hot water treatment are 2.0~10.0%.The fiber extends and false twisting engineering can suppress to melt, fracture of wire and filoplume occur few, it is good that engineering passes through property, and specking and filoplume occur less when forming the fiber body structures such as braid, while excellent quality, the rupture of sheath part when can suppress the hygroscopic polymer volumetric expansion of core component during the hot water treatments such as dyeing, and the dissolution of hygroscopic polymer can be suppressed, also there is excellent moisture pick-up properties after hot water treatment. |