WOOL MATERIAL CARBONIZATION METHOD Russian patent published in 2002 - IPC

FIELD: textile industry. SUBSTANCE: material is impregnated with foamed aqueous composition containing 5-6 wt % of 96% sulfuric acid and 0.15-0.25 wt % of sulfoxide 61 based on synergetic mixture of sodium alkylbenzenesulfonate and oxyethylated aromatics until mass gain 15-17%. Composition shows degree of foaming 12 to 18.5 and half-life period 18.9033.5 min. Treated material is dried, thermally treated, and cooled. Material can be additionally neutralized by way of intensive washing with aqueous solution of synthetic alkaline- nature detergents. EFFECT: improved strength and consumer's properties of material, and optimized process conditions. 2 cl, 5 tbl, 3 ex