Carbon packing is mainly composed of carbon fiber, the scientific name for carbon fibers is “Polypropylene-based carbon fiber”. A composite of carbon fibers and related matrix resins, such as epoxy, has several physical and mechanical properties comparable to those of metals. It is widely used in the fields of aerospace, aviation, chemical industry, electronics and sports equipment because of its high temperature resistance (& GT. 3000 â ° C) , ablation resistance, small Coefficient of thermal expansion, high specific strength and high specific volume. Carbon fiber is mainly composed of carbon elements of a special fiber, its carbon content varies with species, generally more than 90% . Carbon fiber has the characteristics of ordinary carbon materials, such as high temperature resistance, friction resistance, electrical conductivity, thermal conductivity and corrosion resistance, but different from ordinary carbon materials, its shape has remarkable anisotropy, soft, can be processed into a variety of fabrics, along the direction of fiber axis shows high strength. Carbon fiber has a low specific gravity and therefore a high specific strength. So carbon packing has good heat conductivity, wear resistance, chemical stability, and high mechanical strength, starting torque is small, it will not damage the pump shaft, long service life, is a variety of dynamic and static sealing of the ideal material. Carbon fiber packing suitable for acid and alkali corrosive liquids, organic solvents, used in petroleum, chemical industry, chemical fiber, coal mining, power generation, metallurgy and other industrial fields of flange, valve, reactor, pump sealing.