| 摘要 |
PROBLEM TO BE SOLVED: To provide a hygroscopic fiber with high whiteness, having basic properties required for the fiber, characteristics to be possessed by the hygroscopic fiber, improved whiteness and excellent color stability hardly causing color change even in a finishing step or when being used as a final product, and further to provide a method for producing the fiber. SOLUTION: This hygroscopic synthetic fiber having >=10 wt.% saturated moisture absorption at 20 deg.C in 65%RH humidity is characterized in that the whiteness of the fiber represented by the method of representation described in JIS-Z-8729 is >=85 L* and±6 a*, and the discoloration of the fiber after 5 times laundering treated by the laundering treatment regulated by JIS-L-0217-103 is class 3-4 or more evaluated by the gray scale for staining regulated by JIS-L-0805. The method for producing the fiber is also provided. The fiber has the excellent whiteness and the color stability, and further has high hygroscopicity, flame retardancy, antimicrobial activity, deodorant properties, chemical resistance or the like. The fiber can be suitably usable in a wide field such as clothes, night clothes, bedclothes, a building material, a medical good, and an industrial material.
|
