MULTI-LAYER FIRE-RESISTANT TRANSLUCENT MATERIAL Russian patent published in 2003 - IPC

FIELD: fire-resistant multi-layer materials on base of soda-lime glass plates and organic and inorganic films; glazing apertures for fire protection. SUBSTANCE: proposed material includes two outer glass sheets whose surface is covered with film and at least two inner glass sheets whose surface directed towards air space is covered with film; inner sheets are located in parallel relative to outer ones forming air space; they are secured by means of distant frame; surface of outer glass sheets is covered on outer side with low-emission adhesive heat-reflecting film on polyethyleneterephthalic base; surface of inner sheets is covered with colorless adhesive film on polyethyleneterephthalic base or inorganic film made from compound of the following composition, %:sodium silicate hydrate, 13-19;ethyl alcohol, 1-3; glycerin, 0.5-1.2; copper sulfate hydrate, 0.5-1.5; potassium alum, 3-4; wetting agent, 0.1- 0.2; distilled water, up to 100. Said frame is made from thermoexpansible graphite; material thus obtained is symmetrical. Surfaces of inner glass sheets directed towards one air space are covered with similar film. It is preferably to have six inner glass sheets. EFFECT: enhanced efficiency; high transparency. 3 cl, 5 dwg