Carbon fiber from our daily life getting closer, this fiber diameter hair 1/10, its density less than 1/4 of steel, but the tensile strength is 7 to 9 times the steel, tensile elasticity is also Above steel, carbon fiber is lighter than aluminum, harder than steel. Because of its light weight, the carbon fiber composite material is about 20% of steel, and it can even reach the strength of similar steels depending on fiber grade and directionality. In addition, carbon fiber is not rusty, the use of carbon fiber materials can significantly reduce product weight, which can significantly improve fuel efficiency, with its production of aircraft, cars, can save a lot of fuel.

Carbon fiber has high strength, high modulus, high temperature, corrosion resistance, electrical conductivity and thermal conductivity properties, making it a carbon material with both tensile strength and fiber soft processing of the two characteristics of the new chemical materials, Is a new generation of reinforcing fibers. At present, carbon fiber is not only widely used in aerospace, military industry, but also in the automotive components, wind power blades, nuclear power, oil drilling, sporting goods, carbon fiber composite core cables and construction reinforcement material also has a huge application space.

Difficulty 1: Production technology is far behind the developed countries
As carbon fiber applications related to the national defense and military, therefore, carbon fiber technology and production equipment are strictly confidential countries. Japan, the United States and other major production companies for a long time not only for the preparation of high-performance special raw silk a high degree of confidentiality, refused to transfer, do not sell high-performance special wire products, and the possibility of complete sets of technology is also very small.

According to the Chinese Academy of Sciences, Shanxi Institute of Coal Chemistry researcher He Fu introduced China's T300 general-level industrialization has made breakthrough progress, 100-ton and 1000-ton carbon fiber has been put into production; T700 level is undergoing pilot-scale, T800 level is laboratory development . At present, there are one or two units of product quality has exceeded T300-level performance indicators, reached the T400 level, and can be small batch production. This is in the last century 80's Toray in carbon fiber research and development level. From the overall situation, China is currently in the T300 from the general level to the development of high-performance T700 and T800 transition.

However, due to different application areas, the carbon fiber and its composite material quality requirements are also different. In other words, only the general level T300 is far from meeting the market demand. Therefore, He Fu believes that the need to develop high-performance T700, T800 and T1000 grade carbon fiber. For example, he said, the manufacturing of large aircraft, a structural materials need to use T800H grade and its composite material P2302 (T800H / 3902-2); manufacturing carbon fiber composite core aluminum cable (ACCC) also need T700S level. Therefore, the development of high-performance carbon fiber is a priority. The future of the leading products should be T700 and T800 level, and T700 level will gradually replace the T300 level, a new generation of general-purpose carbon fiber.

Dilemma II: small number of repeated R & D
China's carbon fiber research started late, although made some progress, but over the years the development of more slowly. According to the Shanghai Qing Du information technology company Jinqiu energy chemical studio founder Qian Bozhang senior engineer, China since the 20th century, 60 years by the Chinese Academy of Sciences Changchun Institute of Applied Chemistry, the first to start PAN-based carbon fiber research, the early 70s completed a continuous Test device. After that, Shanghai Synthetic Fiber Research Institute, Shanxi Institute of Coal Chemistry, Chinese Academy of Sciences, Beijing University of Chemical Technology, and Shandong University of Technology also began to research work, and in the mid-1980s passed the pilot, entered the industrialization pilot production stage, Hundreds of kilograms to a few tons of small test equipment and an annual output of dozens of tons of pilot plant. But in general, regardless of the technical level, production capacity and product quality and so on with foreign advanced level have bigger disparity.

Into the 21st century, the domestic carbon fiber industry developed rapidly.
From 2000 onwards, China's carbon fiber technology diversification to give up the original nitric acid raw silk manufacturing technology, using dimethyl sulfoxide as solvent one-step wet spinning technology to be successful. At present the use of independent technology developed a small number of domestic carbon fiber products have reached the international level of similar products.

In recent years, the relevant state ministries and commissions have the industrialization of carbon fiber technology as a strategic task of our country. Subsequently, some companies have joined the ranks of carbon fiber production.