| abstract |
FIELD: metallurgy. n SUBSTANCE: invention refers to sheet composite material and to procedure for its fabrication. Material consists of at least one porous internal layer and of at least one shell. The porous internal layer is made out of canvas fabricated out of material of structure with open cells and consisting of random crossing reinforcing fibres bound with at least one or more not foamed thermo-plastic material. The porous internal layer contains fibres at amount of approximately from 20 % wt to 80 % wt of common weight of the said porous internal layer. The shell includes at least one of the following components: thermo-plastic film, elastomer film, metal foil, thermo-reactive coating, non-organic coating, mesh on base of fibres, non-woven cloth and woven material. The shell has ultimate oxygen index over 22 determined according to ISO 4589 and is able to withstand temperature from approximately 200°C to approximately 425°C. Also each shell covers at least part of surface of the said one porous internal layer. n EFFECT: produced material possesses reduced rate of flame spread, reduced level of smoke density, and reduced level of heat and gases release. n 23 cl, 3 tbl |