Carbon fiber (CF for short) is a new type of fiber material with high strength and high modulus fiber with a carbon content of more than 95%. It is a microcrystalline graphite material obtained by carbonization and graphitization by stacking organic fibers such as flake graphite microcrystals along the fiber axial direction.

Carbon fiber is "soft on the outside and rigid on the inside", which is lighter than metal aluminum, but stronger than steel, and has the characteristics of corrosion resistance and high modulus. It is an important material in national defense, military industry and civilian use. It not only has the inherent intrinsic properties of carbon materials, but also has the soft processability of textile fibers. It is a new generation of reinforcing fibers.

Carbon fiber has many excellent properties. Carbon fiber has high axial strength and modulus, low density, high specific performance, no creep, ultra-high temperature resistance in non-oxidizing environment, good fatigue resistance, and specific heat and electrical conductivity are between non-metal and non-metallic. Between metals, the thermal expansion coefficient is small and anisotropic, the corrosion resistance is good, and the X-ray transmittance is good. Good electrical and thermal conductivity, good electromagnetic shielding, etc.

Compared with traditional glass fiber, the Young's modulus of carbon fiber is more than 3 times that of carbon fiber; compared with Kevlar fiber, its Young's modulus is about 2 times that of carbon fiber, and it does not swell in organic solvents, acids and alkalis. Excellent corrosion resistance.

In February 2018, China completely independently developed the first 100-ton T1000 carbon fiber production line.