The main application areas of composite materials are: ① aerospace field. Because the composite material has good thermal stability, specific strength and specific rigidity, it can be used to manufacture aircraft wing and front fuselage, satellite antenna and its supporting structure, solar cell wings and shell, large launch vehicle shell, engine shell, Space shuttle structure and so on. ② automobile industry. As the composite material has a special vibration damping characteristics, can reduce vibration and reduce noise, good fatigue resistance, easy to repair after injury, easy to shape, it can be used to manufacture automobile body, force components, drive shaft, engine frame and its internal member. ③ chemical, textile and machinery manufacturing. A good corrosion resistance of carbon fiber and resin matrix composite materials can be used to manufacture chemical equipment, textile machines, paper machines, copiers, high-speed machine tools, precision instruments. ④ medical field. Carbon fiber composite material has excellent mechanical properties and does not absorb X-ray properties, can be used to manufacture medical X-ray machine and orthopedic stent. Carbon fiber Composite Materials also have biological tissue compatibility and blood compatibility, good stability in the biological environment, but also for biomedical materials. In addition, composite materials are also used in the manufacture of sports devices and for building materials.
Composite material refers to two or more different substances in different ways from the combination of materials, it can play the advantages of a variety of materials to overcome the defects of a single material to expand the scope of application of materials. Because the composite material has the characteristics of light weight, high strength, convenient processing, excellent elasticity, good chemical resistance and weatherability, it has gradually replaced wood and metal alloy. It is widely used in aerospace, automobile, electrical and electronic, construction and fitness equipment And other fields, in recent years has been the rapid development.
With the development of technology, resin and glass fiber in the technical progress, the manufacturer's manufacturing capacity generally increased, making the price of glass fiber reinforced composite materials has been accepted by many industries, but the strength of glass fiber reinforced composite material is not enough And metal rivalry. Therefore, carbon fiber, boron fiber reinforced composite materials have come out, so that the polymer composite family is more complete, has become a must for many industries. At present, the annual output of composite materials in the world has reached more than 550 million tons, with an annual output value of more than 130 billion US dollars, if the European and American military aerospace high value products included, its output value will be even more alarming. From a global perspective, the world's composite production is mainly concentrated in Europe and the United States and East Asia. In recent years, Europe and the United States composite materials production and demand continued to grow, while Asia, Japan is due to economic downturn, the development of relatively slow, but China, especially in the Chinese mainland market is developing rapidly. According to the world's major composite material producer PPG company statistics, in 2000 the global share of composite materials in Europe is about 32%, annual output of about 200 million tons. At the same time, the United States composite materials in the 20th century, the average annual growth rate of about 90 US GDP growth rate of 2 times, reaching 4% to 6%. In 2000, the annual output of US composite materials reached 1.7 million tons. In particular, the rapid increase in automotive composite materials makes the US car in the global market to re-rise. Asia in recent years, the development of composite materials and the overall changes in the political economy is closely related to the share of countries vary widely. Overall, Asia's composite materials will continue to grow, with total output of about 1.45 million tonnes in 2000, with total production expected to reach 1.8 million tonnes in 2005.