Patent ID: 6551705
Filing Date: 2003-04-22
Classification: D01F,D06M,Y10T

Abstract:
Chitosan-containing acrylic fibers having a total chitosan content of 0.05 to 2% by weight and an extractable chitosan content of not less than 0.03% by weight, a difference between the total chitosan content and extractable chitosan content being from 0.03 to 0.8% by weight, wherein chitosan is dispersed in the fibers in the form of fine particles and an equivalent-circle average diameter of the fine particles in a cross section is from 1 to 100 nm, and wherein an average of a shape factor SF defined, by an equation of the fine particles of chitosan in a cross section of acrylic fibers, is from 100 to 300 and its standard deviation is not more than 150, said equation being SF=ML2Ã—&pgr;Ã—100/(4Ã—A) wherein ML represents a maximum length of fine particles of chitosan in a cross section of fibers, and A represents an area of fine particles of chitosan in a cross section of fibers, the chitosan-containing acrylic fibers further having a quaternary ammonium salt content of more than the total chitosan content to not more than 3% by weight.