Carbon fiber is made of man-made chemical fiber with high carbon content and not melting during heat treatment, which is processed by thermal stable oxidation treatment, carbonization treatment and graphitization.

The long carbon fiber reinforced epoxy resin composite material has the highest specific strength and specific modulus, and is the highest among the existing structural materials. In areas where density, stiffness, weight, and fatigue characteristics are critical, long carbon fiber composites are advantageous in applications where high temperatures and high chemical stability are required.