Patent ID: 6821599
Filing Date: 2004-11-23
Classification: D01F,Y10T

Abstract:
A porous acrylic fiber that is mainly composed of a resin composition containing 0.3 to 20 parts by weight of polyvinyl acetate based on 100 parts by weight of an acrylic type copolymer, said fiber being characterized in that a denier of the fiber is 2 to 50 dtex, a flattening ratio of the fiber cross section (ratio of a major-axis width to a minor-axis width) is 2.5 to 25, the major-axis width is 70 to 300 &mgr;m, and the rate of the drop in specific gravity thereof is in the range of 5.0 to 20% when calculated by the EquationRate of drop in specific gravity (%)=100Ã—(1âˆ’Da/Db) where, Da indicates the specific gravity value of the porous acrylic fiber, and Db indicates the true specific gravity value of the resin consisting of the acrylic type copolymer.