MULTILAYER COMBINED HEAT INSULATION FIRE PROTECTION MATERIAL Russian patent published in 2017 - IPC D04H13/00 

FIELD: textile, paper.

SUBSTANCE: invention relates to the production of inorganic insulating materials connected mechanically of woven and nonwoven materials that may be used in a temperature range from -200°C to 1000°C for high temperature insulation of industrial and domestic equipment, as well as sound insulation in construction, transportation and other industries. Multilayer combined heat insulation fire protection material comprising woven and nonwoven materials layers. Woven and nonwoven fabrics are made of amorphous chopped glass fibers and super, ultra-thin crystalline ceramic fibers. One nonwoven layer comprises crystalline ceramic fibers packed with coefficient of fullness not less than 0.9, the other nonwoven layer is composed of amorphous glass fibers, non-woven materials on the outside on both sides are veneered with layers of glass fibre, including clad with metal foil. The layer materials connection is made mechanically with fiber glass filament with a stitch of 3 to 60 mm lengthwise and distance between stitches from 5 to 330 mm, the resulting material has a thickness of 4 to 50 mm, instead of nonwoven layers of amorphous glass and crystalline ceramic fiber the material comprises a nonwoven layer of amorphous glass and crystalline ceramic fibers mixture. Crystalline ceramic fibers with a diameter less than 1 mcm fill the space between the amorphous glass fibers with a diameter of 6-20 mcm, which leads to increased density and lower material thermal conductivity, on both sides from outside the nonwoven materials are veneered with the layers of glass fibers of fillaments having a porous structure with a pore size 3.10 angstroms, which shrink to 8-10%, compress the inner layers and increase the strength of the composite material while heating, instead of the nonwoven material of amorphous glass fibers the nonwoven material layer of crystalline ceramic fibers is used which almost do not have shrinkage (1%) while heating to 1000°C, which allows to keep the original geometric material dimensions, instead of the nonwoven material made of amorphous glass fibers the nonwoven material layer of amorphous basalt fiber is used, the fibre of amorphous glass fiber containing 5 - 18% of ferric oxide is used instead of the glass tissue including clad with metal paper, the nonwoven material of ECR-type glass amorphous filaments is used instead of the nonwoven material of crystalline ceramic fibers, the layer of fabric of crystalline ceramic fibers and the layer of fibreglass mesh of E-type amorphous filaments are used instead of the glass tissue, the woven and nonwoven materials are preliminarily veneered with the glass tissue along the perimeter of the material end grain before sewing.

EFFECT: creating a new multilayer composite environmentally friendly material with high thermal insulation properties and performance characteristics, providing an effective reduction in the heat flux over a wide operating temperature range.

9 cl, 1 dwg