FIELD: heat-insulating materials. SUBSTANCE: method involves mixing friable, mainly swollen vermiculite, (particle size is 6.05 mm and above) with silicate and/or phosphate binding agent and hardening agent. The obtained mixture is formed as sheet and subjected for hot pressing at temperature, pressure and time that are sufficient to remove water from sheet, for binding agent hardening and pore formation in sheet thickness. In the process of pressing sheet is blown with hot gaseous agent feeding as multiple jets directed transverse to sheet. EFFECT: improved method of producing. 8 cl, 2 tbl
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