Production of a substantially inert flexible textile material

Details Production of a substantially inert flexible textile material Production of a substantially inert flexible textile material

1979-09-05

1981-02-17

Smith, Ronald H.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

81156, 81157, 4234471, 427 55, 427176, 427227, 427228, 427377, 428264, 428265, 428367, 428408, 428921, B32B 2302, B32B 2702, D03D 2500, D06B 1900

Patent

active

042515890

ABSTRACT:
A partially carbonized inert fibrous flexible textile material is obtained when a scoured textile material which is a blend of a fibrous acrylonitrile polymer and a fibrous regenerated cellulosic material is impregnated with an aqueous solution of salts which salts are either (a) an ammonium halide and a lower copper alkanoate or (b) an ammonium phosphate and an alkali metal bichromate, the impregnated material heated in a stream of an oxygen-containing gas at 150.degree.-250.degree. C. and then further heated in a stream of inert gas so as to produce a surface temperature on the fibres of 275.degree. to 325.degree. C. and thus rendered substantially uniformly inert.

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