MULTI-LAYER SORPTION FIBROUS PROTECTIVE MATERIAL Russian patent published in 2010 - IPC D04H13/00 A62D5/00 

FIELD: textile, paper.

SUBSTANCE: invention relates to the field of nonwoven materials production, namely to multi-layer sorption fibrous protective materials. Protective material consists of inner layers of nonwoven material from fibres filled with solid sorption particles on the basis of polyacrylonitrile or its mixture with polyurethane and outer covering and outer underlying reinforcing layers arranged on both sides of sorption layers of fibrous material. At the same time material comprises 1-5 homogeneous or heterogeneous inner sorption layers from nonwoven highly porous material, with application of mixture of polyacrylonitrile and polyurethane fibers as fibers of nonwoven material inner layers, content of polyacrylonitrile fibers in mixture with polyurethane is selected in amount of 18-83 wt %, as filler of sorption layers from nonwoven material, solid particles are used from activated carbon, cationite or anionite with particle size of at least 6 micrometre arranged in volume of nonwoven material in amount of 38-64 wt %. Sorption layers of material are reinforced by adhesion with outer covrage layer and second outer underlying layer made of viscode-lavsan foundation material on the basis of high-strength polyester fiber, which contains 25-35 wt % of viscose fiber. At the same time for adhesion adhesive powder composition is used on the basis of ethylene copolymer, which contains, for 100 weight parts of ethylene copolymer, 17-21% of vinyl acetate and 0.0144-0.0176 wt parts of highly disperse hydrophobic loose silicon dioxide.

EFFECT: provides for high steam and air permeability of material for removal of excessive moisture from surface of human skin, increase of its hygroscopic property, development of possibility to provide for high drapability of material with simultaneous production of material with high tensile strength and with high tear strength.

3 cl, 4 ex, 1 tbl