Carbon fiber(abb. CF) is one kind of new material of high strength and high modulus fiber, carbon content over 95%. It is one kind of crystallite graphite material made from organic fiber like plate graphite crystallite which has stuffed along the fiber axis and gone through the carbonization and graphitization. The CF is with an iron hand in a velvet glove, weight less than aluminum and strength higher than steel; also with the character of corrosion resistance, high-modulus, it is an important type of material in fields of defense, military and civilian products. It is a new generation of reinforced fiber, with not only the inherent original characteristics of carbon materials, but also the softness and processibility of textile fiber
CF owns various of excellent performances, such as high axial strength and modulus, low indensity, high ratio performance, creepless, super high-temperature resistance in oxidation environment, good fatigue durability, specific heat and conductivity falling in between metal and non-metal, small and anisotropic thermal expansion coefficient, good corrosion resistance, good X-ray permeability, good conductivity, thermal conductivity and electromagnetic shielding property and so on. The Young modulus of CF is three times of that of the traditional glass fiber and twice of that of the aromatic polyamide fiber. It is of excellent corrosion resistance and does not dissolve and expand in organic solvent, acid and alkali.