Bicomponent acrylic fiber
AssigneeE. I. Du Pont de Nemours and Company
InventorHenry A. Hoffman, Jr.
Life of this patent
Estimating the term…
Abstract
Self-crimping bicomponent acrylic fibers comprising a nonhydrophilic component and a hydrophilic component in eccentric side-by-side relationship which in combination provide an equilibrium crimp reversibility (ECR) of at least about 20% have as the hydrophilic component a copolymer of acrylonitrile containing 0.7 to 1.2 mol percent 2-acrylamido-2-methylpropanesulfonic acid or salts thereof having a total ionizable group content of 180 to 270 milliequivalents per kilogram of copolymer.
Claims2
A self-crimping bicomponent acrylic fiber comprising a nonhydrophilic component and a hydrophilic component in eccentric side-by-side relationship which in combination provide an equilibrium crimp reversibility (ECR) of at least about 20% wherein the hydrophilic component is a copolymer of acrylonitrile containing 0.7 to 1.2 mol percent 2-acrylamido-2-methylpropanesulfonic acid or salts thereof having a total ionizable group content of 180 to 270 milliequivalents per kilogram of copolymer.
Dependencies are inferred from the claim text.