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 more than 0.01 to 0.50 microns.
申请公布号
DE3850498(T2)
申请公布日期
1995.02.23
申请号
DE19883850498T
申请日期
1988.11.14
申请人
E.I. DU PONT DE NEMOURS & CO., WILMINGTON, DEL., US