Carbon fiber is generally made from solid-phase carbonization of polyacrylonitrile fiber. It is a kind of fibrous carbon material. It is stronger than steel, less dense than aluminum, more corrosion-resistant than stainless steel, more resistant to high temperatures than heat-resistant steel, and can conduct electricity like copper. It has many valuable electrical and thermal properties. and new materials with mechanical properties. Carbon fiber has high axial strength and modulus, no creep, good fatigue resistance, specific heat and electrical conductivity between non-metals and metals, small thermal expansion coefficient, good corrosion resistance, low fiber density, and X-ray transparency. Good sex. The strength of general-purpose carbon fiber is 1000MPa and the modulus is about 100GPa. High-performance carbon fiber is divided into high-strength type (strength 2000MPa, modulus 250GPa) and high-model (modulus 300GPa and above). Those with a strength greater than 4000MPa are also called ultra-high-strength models; those with a modulus greater than 450GPa are called ultra-high models. Plastics modified with carbon fiber are now increasingly used in aerospace, electronics, industry, chemicals, automobiles and other fields.