Colored aramid fibers

Details Colored aramid fibers Colored aramid fibers

1988-08-01

1991-02-19

Kendell, Lorraine T.

Stock material or miscellaneous articles

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

Rod, strand, filament or fiber

8925, 428364, 428401, 524 84, 524 87, 524 90, 524190, 524357, 524606, D02G 300

Patent

active

049943235

ABSTRACT:
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.

REFERENCES:
patent: 3767756 (1973-10-01), Blades
patent: 3869429 (1975-03-01), Blades
patent: 3888821 (1975-06-01), Milford, Jr.
patent: 4144023 (1979-03-01), Provost
patent: 4198494 (1980-04-01), Burckel
patent: 4524168 (1985-06-01), Wick
patent: 4705527 (1987-11-01), Hussamy
patent: 4759770 (1988-07-01), Cates et al.

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