Carbon fiber carbon content above 90%, excellent mechanical properties, has high specific strength and specific modulus, a high temperature above 2000 ℃ in an inert environment, the intensity remains unchanged. The excellent properties of carbon fiber: low density, high strength, high temperature resistance, corrosion resistance, abrasion resistance, fatigue, high vibration damping, low thermal expansion coefficient, thermal conductivity, electromagnetic shielding, plus fine textiles and so on. Used in various fields of military and civilian industries, in the aerospace field. 2005 world consumption of carbon fiber has more than 20,000 tons, about 20% of the total consumption. Aerospace demand has increased substantially. 2001 aerospace demand for carbon fiber 2690t, 2002 and 2003, the demand for carbon fiber has decreased in 2002, a reduction of approximately 20% in 2003 decreased by approximately 9%. Demand for aerospace carbon fiber appearance in 2003 after rapid growth in 2006 and 2001 compared to an increase of approximately 40% in 2008 will grow by about 76%.