METHOD FOR PRODUCING OF THERMALLY- AND FIRE-RESISTANT TEXTILE MATERIALS Russian patent published in 2007 - IPC D01F11/16 D01F6/90 D01F6/54 C09K21/14 

FIELD: production of thermally- and fire-resistant textile materials, in particular, materials produced from mixture of thermally stable synthetic fiber and oxidized polyacrylonitrile fiber, which may be used for manufacture of protective clothing for rescuers, servicemen, firemen, oil industry workers, and gas industry workers, filtering fabrics for cleaning of hot gases from toxic dust in metallurgical, cement and other branches of industry, decorative materials, thermally-resistant isolation, and toxic asbestos substitutes.

SUBSTANCE: method involves mixing non-oxidized polyacrylonitrile fiber with thermally stable synthetic fiber in the ratio of from 30/70 to 80/20, respectively; subjecting resulting mixture in the form of yarn, tape, fabric to thermally oxidizing processing at temperature of 240-310 C during 10-180 min.

EFFECT: elimination of problems connected with textile processing of frangible oxidized polyacrylonitrile fibers owing to employment of elastic polyacrylonitrile fibers rather than such oxidized fibers.

2 cl, 7 tbl, 6 ex