MULTI-LAYER HERMETIC ELASTIC COLD-RESISTANT MATERIAL OF ARTIFICIAL LEATHER TYPE Russian patent published in 2005 - IPC

FIELD: light industry; polymer fabric materials welded by high-frequency currents for inflatable floating devices and medical purpose.

SUBSTANCE: proposed multi-layer hermetic elastic cold-resistant material of artificial leather type includes textile warp at surface density of 60-150 g/m² made from synthetic complex threads at linear density of 9-19 tex and twist of 200±20 per meter, adhesive layer formed from solution of polyester urethane solution in dimethyl formamide at viscosity of 50-70 poises and polyisocyanate at viscosity of 1.5 poises at their mass ratio of 1:0.005-0.02 and face polymer coat on base of polyester urethane solution in dimethyl formamide at viscosity of 150-250 poises applied in 2-4 layers at ratio of layers in material by mass :textile warp: adhesive layer: face polymer coat of 1:0.1-0.2:0.7-2. According to another version, material includes textile warp at surface density of 60-150 g/m² made from synthetic complex threads at linear density of 9-18 tex and twist of 200±20 per meter, adhesive layer formed from polyester urethane solution in dimethyl formamide at viscosity of 50-70 poises and polyisocyanate at viscosity of 1.5 poises at mass ratio of 1:0.005-0.02 which is located on wrong and face sides of warp followed by forming face polymer coat on both sides on base of polyester urethane solution in dimethyl formamide at viscosity of 150-250 poises applied in one layer on wrong side and in 2-4 layers on face side at mass ratio of layers in material: textile warp: adhesive layer: face polymer coat of 1:0.-0.4:1-2. Proposed material possesses water and air tightness, high strength of weld seams and bonding of coat with warp.

EFFECT: enhanced efficiency; improved quality of material.

3 cl, 2 tbl, 19 ex