Acrylic synthetic fiber improved in styleability

Details Acrylic synthetic fiber improved in styleability Acrylic synthetic fiber improved in styleability

2006-11-14

2006-11-14

Edwards, N. (Department: 1774)

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

C428S394000, C446S394000

Reexamination Certificate

active

07135225

ABSTRACT:
An object of the present invention is to provide an acrylic synthetic fiber having excellent stylability and heat resistance. The object may be attained by an acrylic synthetic fiber having a knot-like unevenness on a fiber surface thereof, a difference of distances between a depression and a projection of 5.0 micrometers to 15.0 micrometers, a distance between peaks of unevenness of 0.05 mm to 0.5 mm, a flexural rigidity value of the fiber of 7.0×10−7N-m2/m to 10.0×10−7N-m2/m, and a torsional rigidity value of the fiber of 5.0×10−9N-m2to 10.0×10−9N-m2, and furthermore the object may be attained by an acrylic synthetic fiber comprising an acrylic copolymer having a content of acrylonitrile of not less than 60 mol %, a sulfur content originating in a vinyl based monomer including a sulfonic group of 0.15% by weight to 0.50% by weight, and a specific viscosity of 0.20 to 0.50.

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