FIELD: metallurgy.
SUBSTANCE: composite sheet material comprises porous medium layer formed by reinforcing fibers in amount of 20 wt % to 80 wt % of total weight of said medium layer bonded together by thermosetting polymer. Note here that said material contains fireproof agent in amount of 2 wt % to 13 wt % including, at least one of N, P, As, Sb, Bi, S, Se, Te, Po, F, Cl, Br, I and At. Method of making said sheet comprises forming said medium porous layer and laminating at least one coating of its surface. Note also that said coating has oxygen index exceeding 22.
EFFECT: higher fire resistance, reduced smoke formation and toxicity.
26 cl, 3 dwg, 4 tbl
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