HEAT-INSULATING MATERIAL Russian patent published in 1997 - IPC

FIELD: construction engineering. SUBSTANCE: this relates to materials which can be used for thermal protection of heat generating machinery, pipelines transporting high-temperature heat-carriers in the form of gaseous or liquid media. In heat-insulating material, covering layers have edges bent towards each other which embrace edges of layers of fibrous mats tightly closed to each other with creation of internal continuous overlapping seam located between layers of fibrous mats and fastened with them by stitching threads. Edges can be displaced relative to each other. Material is made of basalt fibers and volumetric density of layers is 25-60 g/dm3, covering fabric layers have surface density of 50-300 g/m2. Linear density of stitching threads is 100-2400 tex. Overlapping layer can be strengthened by course of fabric made from basalt fibers, foil or metal-plated film. EFFECT: high efficiency. 4 cl, 7 dwg