Asbestos and perlite powder which is a good heat preservation?
Perlite powder mostly used in fireworks, firecrackers inside, perlite powder in it to play the role of tightening agent, density adjustment can also be used as perlite filter aid, but also deep processing, other areas can also use.Taiwan pearl stone is called perlite, acidic volcano lava a similar liparite, due to rapid cooling after the eruption, the formation of spherical glassy rock, a curved or circular crack, like pearl structure, so named perlite.
For the general perlite light gray, pale green and brown, silica content of 70%, moisture content is 3-5%, when the perlite is heated to 850 - 900 degrees, because the glass softening, the evaporation of water, caused by volume expansion can reach 7 - 16 times the original volume, for the expanded perlite. The expanded pearlite has good sound-absorbing, moisture absorption, strong frost resistance performance, it is widely used as building insulation materials, can also be used as agricultural soil, increase soil moisture capacity, in addition to industrial casting, brewing, filtering and washing process can also be used as auxiliary materials.
Asbestos, also known as asbestos, is a kind of silicate mineral product with high tensile strength, high flexibility, chemical and thermal resistance, electrical insulation and spinnability. It is a general term for natural fibrous silicate minerals.1. Asbestos has the function of heat preservation, heat insulation, insulation and sound insulation. In general industrial woven asbestos fiber yarn, thread, rope, cloth, such as packing, transmission, thermal insulation, insulation and other parts of the material or material, mainly used in building made of asbestos, asbestos paper fireproof board, pipe insulation and thermal insulation, heat insulation, kiln pad and insulation, sound insulation material etc..2. Asbestos has good acid and alkali resistance. Asbestos fibers can be mixed with cement to make asbestos cement tiles, plates, roofing boards, asbestos pipes and other asbestos cement products. Asbestos and asbestos can be made of asphalt mixing asphalt asphalt products, such as asbestos board, cloth (felt), paper, paint, asbestos brick and liquid filling cement pavement and expansion putty crack use, as the senior building waterproof, thermal insulation, insulation, acid and alkali resistant materials and traffic engineering materials.3 asbestos has an ablative effect. Defense of asbestos and phenol, polypropylene plastic adhesive, can be made into rocket anti ablation materials, aircraft wing, fuel tank, rocket tail nozzle tube and high speed torpedo launchers, ships, cars and aircraft, tanks, ships in sound insulation, heat insulation materials, asbestos and rubber mixing die, also can be made into sealing material connector for liquid rocket engine. Asbestos and phenolic resin laminate can be used as thermal protection material for missile head. Blue asbestos can also be used as chemical, anti radiation lining, separator or filter, acid resistant packing, rubber board and so on.
