COMPOSITE LAYERED RUBBERISED FABRIC PROTECTIVE MATERIAL BASED ON BUTADIENE-NITRILE RUBBER WITH BARRIER LAYER Russian patent published in 2012 - IPC B32B25/10 B32B25/16 B32B27/12 B32B27/18 B32B27/26 B32B27/32 D01F6/90 D01F6/92 C08L9/02 C08J5/04 

FIELD: chemistry.

SUBSTANCE: composite layered rubberised fabric protective material based on butadiene-nitrile rubber with barrier layer is made three-layered and consisting of middle reinforcing layer, on both sides of which outer covering layers are located, and middle reinforcing layer is made in form of fabric from highly strong polyester fibre with thread of linear density 9-12 tex, with specific breaking load not lower than 610 mN/tex and number of coils 180-220 twists/m, or highly strong aramid fibre or their mixture, highly strong aramid thread with linear density 6.3-14.3 tex, specific breaking load not lower than 200 cN/tex and number of coils 90-130 twists/m being used in the fabric, and threads are used in form of two-component combined thread, whose first component in form of rod represents aramid and/or polyester complex thread or yarn, and second component of two-component combined thread in form of rod braid with number of coils 600-900 twists/m represents modified fire-proof viscose thread or yarn with linear density 10-30 tex, in aramid thread or yarn also used are polyparaphenylene terephthalamide, polymetaphenylene terephthalamide, copolyparaphenylene terephthalamide or copolyparaphenylene benzimidazole terephthalamide fibres. Outer covering layers are made from rubber composition, containing butadiene-nitrile rubber, accelerator of vulcanisation - zinc oxide and thiuram "D", sulphur, regulator of vulcanization rate - additionally zinc oxide, white soot and technical carbon, stearic acid, fire retardants - antimony trioxide, chloroparaffin and melamine cyanurate, pigment - titanium white, antioxidant - polymerised 1,2-dihydro-2,2,4-trimethyl quinoline. On the surface of material from one or two sides of outer covering layer applied is barrier film material from five successively located with respect to surface of outer covering layers, made with total thickness 18-36 mcm in the following succession: first layer from polyolefin, second layer from oriented polypropylene copolymer, third layer from polyvinyl alcohol, fourth layer from oriented polypropylene copolymer and fifth layer from polyolefin. Ratio of thicknesses of barrier layer layers is selected equal (0.18-0.22):(0.23-0.27):0.1:(0.23-0.27):(0.18-0.22). From both sides of third layer of barrier film material located are adhesive layers, made from copolymer of ethylene with vinyl alcohol and maleic anhydride, or from copolymer of ethylene with vinylacetate and maleic anhydride or from copolymer of ethylene with maleic anhydride.

EFFECT: invention makes it possible to provide reliable protection of human skin against aerosol and drop penetration of liquid chemical and harmful substances, preserving higher incombustibility and low surface density, and preserve high drapeability of material and its high tensile and tear strength.

10 cl, 6 ex