Why is asbestos used so weak in industry? What are its uses?
Production method of asbestos cement products with round net copy method, Mani Galliani extrusion forming method, injection method and dry method, etc..Hatschek process is the most widely used method. The process is asbestos cement slurry water dilute suspensions become a certain concentration, the round net cylinder filtration dehydration and transferred to a thin layer of felt on the formation of unprovoked, and then through the vacuum dehydration and compacting pressure, the thin layer of viscous material into billet with a certain thickness, for processing into various products such as, pantile, plate and pipe etc..The manyani molding method (Magnani process) is a thick asbestos cement slurry or asbestos cement suspension directly into the molding machine cloth, vacuum dehydration and compacting pressure, made of asbestos cement corrugated tile or pressure pipe. Mani Galliani extrusion forming method, injection method, method of manufacturing dry or asbestos cement products, the utilization rate was not as good as asbestos round net copy method.Asbestos cement products have higher flexural and tensile strength and can be made into thin wall products. They also have many advantages, such as corrosion resistance, water resistance, frost resistance and heat resistance, and easy mechanical processing. The main disadvantage is its low impact strength.Asbestos fibers can increase the softening temperature of asphalt and reduce its brittleness at low temperature. Asphalt products with thin asphalt asbestos board, asbestos cloth (asphalt asbestos felt), asbestos, asbestos asphalt asphalt paper brick, asbestos paint and soft liquid filled with the expansion of cement pavement and putty, as building waterproof, thermal insulation, moisture-proof, filling, insulation and alkali resistant materials etc..
Asbestos is of high fire resistance, electrical insulation and thermal insulation. It is an important fireproof, insulating and heat insulating material. However, because asbestos fibers can cause asbestos, pleural mesothelioma and other diseases, many countries have chosen to ban the use of such dangerous substances.
Asbestos used in the world 95% is chrysotile asbestos, and its fibers can be split into very fine fibers, with excellent spinning properties. Crocidolite and amosite asbestos accounted for 5% of the total consumption, mainly used in shipbuilding. Amphibole asbestos is an asbestos similar to talc and is often used as "industrial talc."".Asbestos fibres can be made into 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. 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. 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.
