From the carbon fiber industry chain, China’s carbon fiber in the field of listed companies are: raw silk manufacturer Qifeng Chemical Fiber, raw silk carbonized enterprise carbon steel guitar and blond technology, carbon fiber prepreg and composites manufacturer Tai Yuen shares and aerospace composites business Bo Yun new material. According to the US predicts that global sales growth of carbon fiber tow will be $ 1.6 billion in 2011 to $ 4.5 billion in 2020, sales of carbon fiber reinforced composites will grow from $ 16.11 billion in 2011 to 48.7 billion in 2020 dollars.
Carbon fiber industry chain
Carbon fiber is the carbon content of more than 90% of the inorganic polymer fiber, high strength, high modulus, high temperature resistance, a variety of excellent performance corrosion, abrasion, thermal and electrical conductivity and the like. Carbon fiber is essential to the national economy and national defense strategic new materials with a wide range of applications in the aerospace, automotive, wind energy, oil drilling, carbon fiber composite core cables, construction reinforcement, sports and leisure and medical equipment. Carbon fiber industry chain including raw silk, carbon fibers, intermediate materials, composite materials and downstream applications five areas, shown in Figure 1.
Raw silk
Development and production of raw silk is a key technology of carbon fiber, high-quality carbon fiber comes from high-quality raw silk. Preparation strands include polymerization and spinning, which is divided into wet spinning spinning technique, dry spinning, dry-jet wet spinning and melt spinning. Currently, the wet spinning carbon fiber manufacturer in the world spinning techniques commonly used. And dry-jet wet spinning is a new way to combine dry and wet, and the spinning speed 5-10 times higher than the wet spinning, wet spinning technique is gradually replacing.
Carbon fiber
Raw silk after pre-oxidation, carbonization and post-treatment process to obtain carbon fibers. Among them, the pre-oxidation plays a role in the past and is a key step in the preparation of carbon fibers. Carbonization low temperature carbonization and high temperature carbonization into two stages, low temperature carbonization temperature of 300 ℃ -1000 ℃, high temperature carbonization temperature of 1000 ℃ -1600 ℃. After the carbon fiber treatment method mainly electrochemical oxidation method, a liquid phase oxidation, air oxidation and plasma oxidation method. In order to protect the carbon fiber surface, reducing wool yarn and filament breakage, and finally need carbon fiber coated with a layer of epoxy glue to protect, namely sizing.
Intermediate material
Carbon fiber prepreg is to be molded in the resin impregnated intermediate material. Carbon fiber prepreg is the interface between carbon fiber and an important bridge of composite materials, timely feedback to the fiber quality fiber production sector to help improve process performance fiber sector. Enter the field of composite materials, carbon fiber not only can increase the added value, but also can reduce the impact of price fluctuations on the carbon fiber business.
Composites
The prepreg is laminated, winding, such as heat-cured to obtain a composite material. Carbon fiber reinforced composite materials including carbon fiber reinforced polymer matrix composites, carbon fiber reinforced ceramic matrix composites, carbon fiber reinforced metal matrix composites and C / C composites. Among them, the carbon fiber-reinforced resin composite material about 90% market share, is the main application market carbon fiber, carbon fiber high quality requirements.
Application
Application of carbon fiber is mainly aerospace, industrial applications and sports and leisure 3 chunks. Globally, carbon fiber in general industrial applications accounted for 61%, about 22% of aerospace, sports and leisure only 17%.
International carbon fiber market is Japan, the US monopoly enterprises in recent years, Turkey, South Korea, Saudi Arabia and other emerging countries of the carbon fiber industry is on the rise.
Industry Bottleneck
Due to the special nature of the carbon fiber composite materials in the field of foreign technology for high-performance carbon fibers and high-end technology and equipment monopolistic blockade, low-end carbon fiber products to our country dumping. Japan and other large foreign companies accounted for more than 95 percent of global carbon fiber market and use of its technology and scale advantages to lower prices, leading to domestic enterprises were forced to cut prices. A level of stable production of carbon fiber, the price of foreign enterprises dropped significantly again. For example, in 2010 the T300 12k price is 24 yuan / ton, 2012 dropped to 120,000 yuan / ton. Affected by foreign dumping and malicious Competitive Sales, coupled with China’s carbon fiber enterprises are small and scattered state, the quality is still not stable, and the production cost is higher than the price of imported products, the industry was losing money.
