Carbon fiber is a kind of special fiber with a carbon content greater than 90% prepared by pre-oxidation, carbonization, and graphitization processes using polyacrylonitrile as raw material.。It has the characteristics of high temperature resistance, friction resistance, electrical conductivity, thermal conductivity and corrosion resistance.

Carbon fiber prepreg is a composite of epoxy resin on carbon fiber through high pressure and high temperature technology. The composite material made of carbon fiber yarn, epoxy resin, release paper and other materials through the processes of coating, hot pressing, cooling, laminating, winding, etc. is called carbon fiber prepreg. It has the advantages of high strength and low density, and is an important material for the development of the aerospace field today.