Colored aramid fibers

Details Colored aramid fibers Colored aramid fibers

D - Textiles, Paper

01

F

18/588, 400/7809

D01F 6/60 (2006.01) D01F 1/04 (2006.01)

Patent

CA 1335682

Colored, high strength, high modulus p-aramid fibers are prepared by including an organic pigment which is soluble in but not degraded by concentrated sulfuric acid in a p-aramid spinning dope wherein the solvent is concentrated sulfuric acid and spinning the pigment containing dope through an air gap into a coagulation bath and washing and drying the resulting fibers. The dissolved pigment is precipitated by the coagulation bath as particles with a diameter of less than 0.50 microns.

581218

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