FILTERING NONWOVEN MATERIAL Russian patent published in 2000 - IPC

FIELD: textile industry. SUBSTANCE: nonwoven material has fibrous fabric with layer of anion-exchange modified polyamide fibers on the base of grafted copolymer of polycaproamide and diethylamine ethyl methacrylate fastened with loops of filament bundles of fibrous fabric. Nonwoven material is further provided with layer of hydrophilic modified polyamide filament of megalone. Content of anion-exchange modified polyamide filament on the base of grafted copolymer of polycaproamide and diethylamine ethyl methacrylate in anion-exchange layer is 100 wt.%, and wt.% ratio of hydrophilic and anion-exchange layer in material is (0.2-0.4):1. Material may be used for manufacture of filtering members of dust and gas catching units, in particular, units for catching solid substance and acid gases. EFFECT: improved protective qualities of material by increased static exchange capacity and full dynamic exchange capacity and increased efficiency. 1 tbl, 3 ex