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Composite materials (high performance composite materials)

Composite material is a new material that people use advanced material preparation technology to optimize the composition of different materials. The general definition of composite materials should meet the following conditions:

(i) Composite materials must be man-made and designed and manufactured according to people's needs;

(II) the composite material must be composed of two or more material components with different chemical and physical properties in the designed form, proportion and distribution, with obvious interface between the components;

(III) it is structurally designable and can be used for composite structural design;

(IV) composite materials not only maintain the advantages of the properties of each component, but also obtain the comprehensive properties that can not be achieved by a single component through the complementary and correlation of the properties of each component[ 1]

The matrix materials of composites can be divided into metal and non-metal. Aluminum, magnesium, copper, titanium and their alloys are commonly used in metal matrix. Nonmetallic matrix mainly includes synthetic resin, rubber, ceramics, graphite, carbon, etc. The reinforcing materials mainly include glass fiber, carbon fiber, boron fiber, aramid fiber, silicon carbide fiber, asbestos fiber, whisker and metal.

Characteristics of various materials draw on each other's strong points and complement each other's weak points in performance, and they are classified into two categories: metal and non-metal

catalogue

1 History

2 classification

3 performance

4 molding method

5 Application

▪   application area

▪   Development and Application

▪   Reinforcing material

▪   glass fibre

▪   carbon fibre

▪   Aramid fiber

▪   Composite material innovation

▪   Composite market

▪   Infrastructure applications

▪   Treatment and regeneration

▪   Automotive Applications

Historical phonetics

The history of composite materials can be traced back to ancient times. Rice straw or wheat straw reinforced clay used since ancient times and reinforced concrete used for hundreds of years are composed of two kinds of materials. In the 1940s, due to the needs of aviation industry, glass fiber reinforced plastics (commonly known as glass fiber reinforced plastics) were developed. Since then, the name of composite material appeared. After 1950s, carbon fiber, graphite fiber and boron fiber with high strength and high modulus have been developed. Aramid fiber and silicon carbide fiber appeared in 1970s. These high strength and high modulus fibers can be compounded with synthetic resin, carbon, graphite, ceramics, rubber and other non-metal matrix or aluminum, magnesium, titanium and other metal matrix to form unique composite materials.

The development of modern high technology is inseparable from composite materials. Composite materials play a very important role in the development of modern science and technology. The research depth and application scope of composite materials, as well as the speed and scale of production and development, have become one of the important symbols to measure the advanced level of science and technology of a country. Since the beginning of the 21st century, the global composite market has grown rapidly, especially in Asia and China. From 2003 to 2008, China's average annual growth rate was 15%, India's was 9.5%, while Europe and North America's average annual growth rate was only 4%.

Composite materials for the fifth generation fighter

Composite materials for the fifth generation fighter

In the 1960s, in order to meet the needs of materials used in aerospace and other cutting-edge technologies, composites reinforced with high-performance fibers (such as carbon fiber, boron fiber, aramid fiber, silicon carbide fiber, etc.) were developed and produced successively, with the specific strength greater than 4 × 10 cm, and the specific modulus is greater than 4 × 10cm。 In order to distinguish from the first generation of glass fiber reinforced resin composites, this kind of composites is called advanced composites. According to different matrix materials, advanced composites can be divided into resin matrix, metal matrix and ceramic matrix composites. The service temperature of the system is 250-350 ℃, 350-1200 ℃ and above 1200 ℃. In addition to being used as structural materials, advanced composite materials can also be used as functional materials, such as gradient composite materials (functional composite materials whose chemical and crystallographic composition, structure and voids of materials continuously change in space), smart composite materials (functional composite materials with sensing, processing and executive functions and can adapt to environmental changes), bionic composite materials, stealthy composite materials, etc.

In 2007, China (mainland) produced 1.6 million tons of composite glass fiber, of which 1.155 million tons were used in FRP industry; The output of unsaturated polyester resin (UPR) is 1.35 million tons, of which 688000 tons are used in the field of FRP, accounting for 51%; The output of vinyl resin is 12640 tons and gel coat resin is 15870 tons.

In 2008, the economy of China's composite industry was stable, and the output increased by about 12%. The annual industrial added value of Enterprises above Designated Size in the industry was 8.67 billion yuan, the total industrial output value was 25.8 billion yuan, the output value of new products was 1.16 billion yuan, and the sales output value was 25.3 billion yuan.

At present, China's FRP and composite industry is facing a new period of great development, such as large-scale municipal construction in the process of urbanization, utilization and large-scale development of new energy, introduction of environmental protection policies, development of automobile industry, large-scale railway construction, large aircraft projects, etc. Under the huge market demand, the development of composite material industry will have a very broad development space.

Since the beginning of 2010, the national development and Reform Commission, the Ministry of science and technology, the Ministry of Finance and the Ministry of industry and information technology have jointly formulated and issued the draft of the decision on accelerating the cultivation of strategic emerging industries. After six months of consultation, the main fields have expanded from seven to nine, including two items of special function and high-performance composite materials.

After the "ten major industries revitalization plan", the "strategic emerging industries" has been regarded as another major measure to revitalize the economy. Since then, large-scale government investment has also been widely expected by the market. Therefore, it is also regarded as another large-scale industrial investment plan after the national "4 trillion" investment plan[ 4]

Classified speech

Composite [5] is a mixture. In many areas have played a great role, instead of a lot of traditional materials. According to its composition, composites can be divided into metal to metal composites, nonmetal to metal composites, nonmetal to nonmetal composites. According to its structural characteristics, it can be divided into: 1) fiber reinforced composites. All kinds of fiber reinforcements are compounded in the matrix material. Such as fiber reinforced plastics, fiber reinforced metals, etc. ② Sandwich composites. It is composed of different surface materials and core materials. Generally, the surface material is high strength and thin; The core material is light, low strength, but has a certain stiffness and thickness. It can be divided into solid sandwich and honeycomb sandwich. ③ Fine grained composites. The hard particles are uniformly distributed in the matrix, such as dispersion strengthened alloy, cermet and so on. ④ Hybrid composites. It is composed of two or more kinds of reinforcing materials mixed in one matrix material. The impact strength, fatigue strength and fracture toughness of the composites are significantly higher than those of the ordinary single reinforced composites, and the composites have special thermal expansion properties. It can be divided into interlaminar hybrid, interlaminar hybrid, sandwich hybrid, interlaminar / interlaminar hybrid and super hybrid composites.

Composites can be divided into structural composites and functional composites.

Structural composite is a kind of material used as load-bearing structure, which is basically composed of reinforcement component that can bear load and matrix component that can connect reinforcement to form a whole material and transfer force at the same time. Reinforcements include various glass, ceramics, carbon, polymers, metals, natural fibers, fabrics, whiskers, sheets and particles, while the matrix includes polymers (resins), metals, ceramics, glass, carbon and cement. A variety of structural composites can be made up of different reinforcements and different matrix, and named after the matrix used, such as polymer (resin) matrix composites. The characteristic of structural composite material is that it can select materials according to the requirements of the material in use. More importantly, it can also carry out the composite structure design, that is, the reinforcement arrangement design, which can reasonably meet the needs and save materials.

Functional composites are generally composed of functional components and matrix components. The matrix not only plays the role of forming a whole, but also has the role of synergy or strengthening function. Functional composites refer to the composites that provide other physical properties besides mechanical properties. Such as: conductive, superconducting, semiconductive, magnetic, piezoelectric, damping, wave absorption, wave transmission, friction, shielding, flame retardant, heat proof, sound absorption, heat insulation, highlight a function. They are called functional composites. Functional composites are mainly composed of functional body, reinforcement and matrix. The functional body can be composed of one or more functional materials. The composite material of multi-functional body can have many functions. At the same time, there may be new functions due to the compound effect. Multifunctional composites are the development direction of functional composites.

Composite materials can also be divided into common and advanced types.

Common composite materials, such as glass fiber reinforced plastics, are composed of low performance reinforcements such as glass fiber and common polymers (resins). Because of its low price, it has been widely used in ships, vehicles, chemical pipelines and tanks, building structures, sporting goods and so on.

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Fiber reinforced materials are the most widely used and used in composites. It is characterized by small specific gravity, high specific strength and specific modulus. For example, the specific strength and specific modulus of carbon fiber / epoxy resin composites are several times higher than those of steel and aluminum alloy. They also have excellent chemical stability, friction and wear resistance, self lubrication, heat resistance, fatigue resistance, creep resistance, noise elimination, electrical insulation and other properties. The composite of graphite fiber and resin can obtain the material with the coefficient of thermal expansion almost equal to zero. Another characteristic of fiber reinforced materials is anisotropy, so the arrangement of fibers can be designed according to the strength requirements of different parts of the parts. The aluminum matrix composites reinforced with carbon fiber and silicon carbide fiber can maintain enough strength and modulus at 500 ℃. Silicon carbide fiber and titanium composite, not only improve the heat resistance of titanium, and wear resistance, can be used as engine fan blade. The composite of SiC fiber and ceramic can be used at 1500 ℃, which is much higher than that of super alloy turbine blade (1100 ℃). Carbon fiber reinforced carbon, graphite fiber reinforced carbon or graphite fiber reinforced graphite constitute ablation resistant materials, which have been used in spacecraft, rocket missiles and nuclear reactors. Because of its low density, nonmetal matrix composites can reduce weight, improve speed and save energy when used in automobiles and airplanes. The composite leaf spring made of carbon fiber and glass fiber has the same stiffness and bearing capacity as the steel leaf spring which is more than five times of its weight.

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Molding method

The forming methods of composite materials are different according to different matrix materials. There are many molding methods of resin matrix composites, including hand lay up molding, spray molding, filament winding molding, molding, pultrusion molding, RTM molding, autoclave molding, diaphragm molding, migration molding, reaction injection molding, soft film expansion molding, stamping molding, etc. The forming methods of metal matrix composites can be divided into solid forming method and liquid forming method. The former is formed by applying pressure at a temperature lower than the melting point of the substrate, including diffusion welding, powder metallurgy, hot rolling, hot drawing, hot isostatic pressing and explosive welding. The latter is to melt the matrix and fill it into the reinforcement materials, including traditional casting, vacuum suction casting, vacuum back pressure casting, squeeze casting and spray casting, etc.

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Application

The main application fields of composite materials are: (1) aerospace field. Due to its good thermal stability, high specific strength and stiffness, the composite can be used to manufacture aircraft wings and forebodies, satellite antennas and their supporting structures, solar cell wings and shells, large launch vehicle shells, engine shells, space shuttle structural parts, etc. ② Automobile industry. Because of the special vibration damping characteristics, the composite material can reduce vibration and noise, has good anti fatigue performance, is easy to repair after damage, and is convenient for integral forming, so it can be used to manufacture automobile body, stressed components, transmission shaft, engine frame and its internal components. ③ Chemical industry, textile and machinery manufacturing. Carbon fiber with good corrosion resistance is compounded with resin matrix, which can be used to manufacture chemical equipment, textile machine, paper machine, copier, high-speed machine tool, precision instrument, etc. ④ Medical field. Carbon fiber composite has excellent mechanical properties and non absorption of X-ray, which can be used to manufacture medical X-ray machine and orthopedic bracket. Carbon fiber composite materials also have biocompatibility and blood compatibility, good stability in biological environment, and can also be used as biomedical materials. In addition, the composite materials are also used in the manufacture of sports devices and building materials.

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Development and Application

Composite material is a material composed of two or more different materials in different ways. It can give full play to the advantages of various materials, overcome the defects of a single material and expand the application scope of materials. Due to the characteristics of light weight, high strength, convenient processing, excellent elasticity, chemical corrosion resistance and good weather resistance, composite materials have gradually replaced wood and metal alloys, and are widely used in aerospace, automobile, electronic and electrical, construction, fitness equipment and other fields, and have been developed rapidly in recent years.

With the development of science and technology, the technology of resin and glass fiber is constantly improved, and the manufacturing capacity of manufacturers is generally improved. The price and cost of glass fiber reinforced composites have been accepted by many industries, but the strength of glass fiber reinforced composites is not enough to compete with metal. Therefore, carbon fiber, boron fiber and other reinforced composites have come out one after another, which makes the polymer composite family more complete and has become a necessary material for many industries. At present, the annual output of composite materials in the world has reached more than 5.5 million tons, with an annual value of more than 130 billion US dollars.If the high-value products of European and American military aerospace are included, the output value will be even more amazing. Globally, the production of composite materials in the world is mainly concentrated in Europe, America and East Asia. In recent years, the production and demand of composite materials in Europe and America continue to grow, while Japan in Asia develops slowly due to the economic downturn. However, the market in China, especially in the mainland of China, develops rapidly. According to the statistics of PPG, the world's leading composite material manufacturer, the global share of composite materials in Europe was about 32% in 2000, with an annual output of about 2 million tons. At the same time, the average annual growth rate of composite materials in the U.S. in the 1990s was about twice that of the U.S. GDP, reaching 4% ~ 6%. In 2000, the annual output of composite materials in the United States reached about 1.7 million tons. In particular, the rapid increase of composite materials for automobile makes American automobile rise again in the global market.

The development of composite materials in Asia in recent years is closely related to the overall changes of politics and economy, and the share of each country has changed greatly. Overall, Asia's composite materials will continue to grow, with a total output of 1.45 million tons in 2000 and 1.8 million tons in 2005.In terms of application, composite materials are mainly used in aerospace, automobile and other industries in the United States and Europe. In 2000, the consumption of composite materials for automobile parts in the United States reached 148000 tons, while that in Europe is estimated to reach 105000 tons by 2003. In Japan, composite materials are mainly used in residential construction, such as bathroom equipment, etc. the consumption of such products reached 75000 tons in 2000, and the consumption of automobile and other fields was only 24000 tons. However, from a global perspective, the automotive industry is the largest user of composite materials, and its future development potential is still very huge.

At present, many new technologies are still under development. For example, in order to reduce engine noise and increase car comfort, efforts are being made to develop damping steel plates with thermoplastic resin adhered between two layers of cold rolled plates; In order to meet the requirements of high-speed, supercharging and high load development of engine, metal matrix composites have been used in piston, connecting rod and bearing bush of engine. In order to meet the requirements of automobile lightweight, more and more new composite materials will be applied to automobile manufacturing industry. At the same time, with the increasing attention to environmental protection in recent years, the application of polymer composites to replace wood has been further promoted. For example, composite materials made from plant fibers and waste plastics have been widely used as pallets and packing boxes in North America to replace wooden products; And degradable composites have become the focus of research and development at home and abroad.

In addition, nanotechnology has gradually attracted people's attention, and the research and development of nanocomposites has become a new hot spot. By modifying plastics with nano particles, the aggregation state and crystalline form of plastics can be changed, so that they have new properties. The contradiction between rigidity and toughness of traditional materials is overcome, and the comprehensive properties of materials are greatly improved.

Reinforcing material

The reinforced materials used in resin matrix composites mainly include glass fiber, carbon fiber, aramid fiber, UHMWPE fiber, etc.

glass fibre

At present, the glass fibers used in high-performance composites mainly include high-strength glass fiber, quartz glass fiber and high silica glass fiber. Due to the high cost performance of high-strength glass fiber, the growth rate is relatively fast, with an annual growth rate of more than 10%. High strength glass fiber composites are not only used in military, but also widely used in civil products in recent years, such as bulletproof helmets, bulletproof suits, helicopter wings, early warning aircraft radome, various high-pressure pressure vessels, civil aircraft straight board, sporting goods, various high-temperature products and recently reported tire cord with excellent performance. Quartz glass fiber and high silica glass fiber are high temperature resistant glass fibers, which are ideal heat-resistant and fireproof materials. Phenolic resin reinforced with quartz glass fiber can be used to make high temperature resistant and ablation resistant composite parts with various structures, which are widely used in heat-resistant materials of rockets and missiles. So far, only high strength glass fiber has reached the international advanced level, and has independent intellectual property rights, forming a small-scale industry. At present, the annual output can reach 500 tons.

carbon fibre

Carbon fiber has a series of properties, such as high strength, high modulus, high temperature resistance, electrical conductivity and so on. First of all, it has been widely used in the field of aerospace. In recent years, it has also been widely used in sports equipment and sporting goods. It is predicted that industrial carbon fiber will be widely used in civil construction, transportation, automobile, energy and other fields. From 1997 to 2000, the annual growth rate of aerospace carbon fiber is estimated to be 31%, while the annual growth rate of industrial carbon fiber is estimated to be 130%. The overall level of carbon fiber in China is still relatively low, which is equivalent to the level of foreign countries in the mid and late 1970s, and the gap with foreign countries is about 20 years. The main problems of domestic carbon fiber are unstable performance, large dispersion coefficient, no high performance carbon fiber, single variety, incomplete specification, insufficient continuous length, no surface treatment and high price.

Aramid fiber

Since the 1980s, the Netherlands, Japan and the former Soviet Union have also carried out the research and development of aramid fiber. Aramid fibers from Japan and Russia have been put into the market with an annual growth rate of about 20%. Aramid fiber has high specific strength and modulus, so it is widely used in high-performance composite parts (such as rocket engine shell, aircraft engine compartment, fairing, rudder, etc.), ships (such as aircraft carriers, nuclear submarines, yachts, lifeboats, etc.), automobiles (such as tire cord, high-pressure hose, friction materials, etc.) High pressure cylinder, etc.) and heat-resistant transport belt, sports equipment, etc.

UHMWPE fiber

The strength of UHMWPE fiber is the highest among all kinds of fibers, especially its chemical resistance and corrosion resistance. It also has excellent high-frequency sonar permeability and seawater corrosion resistance. Many countries have used it to manufacture high-frequency sonar deflector of warships, which greatly improves the capability of mine detection and mine sweeping of warships. In addition to the military field, UHMWPE fiber also has broad application prospects in automobile manufacturing, shipbuilding, medical equipment, sports equipment and other fields. As soon as the fiber came out, it attracted great interest and attention of developed countries in the world.

Thermosetting resin matrix composites

Thermosetting resin matrix composites refer to the composites made of thermosetting resins such as unsaturated polyester resin, epoxy resin, phenolic resin, vinyl ester resin, glass fiber, carbon fiber, aramid fiber, ultra-high molecular weight polyethylene fiber, etc. Epoxy resin is characterized by excellent chemical stability, electrical insulation, corrosion resistance, good adhesion and high mechanical strength. It is widely used in chemical industry, light industry, machinery, electronics, water conservancy, transportation, automobile, household appliances, aerospace and other fields. The production capacity of epoxy resin in the world was 1.3 million tons in 1993, increased to 1.43 million tons in 1996, 1.48 million tons in 1997, 1.5 million tons in 1999 and about 1.8 million tons in 2003. China began to study epoxy resin in 1975. According to incomplete statistics, there are about 170 epoxy resin manufacturers in China, with a total production capacity of more than 500000 tons and an equipment utilization rate of about 80%. Phenolic resin is widely used in various fields of composite material industry because of its excellent heat resistance, abrasion resistance, high mechanical strength, excellent electrical insulation, low smoke and acid resistance. In 1997, the global output of phenolic resin was 3 million tons, including 1.64 million tons in the United States. China's output is 180000 tons and imports 40000 tons. Vinyl ester resin is a new type of thermosetting resin developed in the 1960s. It is characterized by good corrosion resistance, solvent resistance, high mechanical strength, high elongation, good bonding performance with metal, plastic, concrete and other materials, good fatigue resistance, good electrical performance, heat aging, low curing shrinkage, and can be cured at room temperature or by heating. Nanjing Jinling DSM resin Co., Ltd. has imported Atlac series strong corrosion resistant vinyl ester resin from Holland, which has been widely used in storage tanks, containers, pipes, etc., and some varieties can also be used for waterproof and hot pressing. Nanjing Julong composite material Co., Ltd., Shanghai Xinhua resin factory and Nantong Mingjia polymer Co., Ltd. also produce vinyl ester resin.

Before 1971, China's thermosetting resin matrix composites industry was mainly military products, but after 1970s, it began to turn to civilian. Since 1987, a large number of foreign advanced technologies have been introduced, such as tank furnace drawing, chopped strand mat, surface mat production line, polyester resin (US, Germany, Netherlands, UK, Italy, Japan) and epoxy resin (Japan, Germany) production technologies of various brands; In terms of molding process, we have introduced winding pipe, can production line, pultrusion process production line, SMC production line, continuous plate making unit, resin transfer molding (RTM) molding machine, spray molding technology, resin injection molding technology and fishing rod production line, etc., forming a complete industrial system from research, design, production and raw material matching, There are more than 3000 manufacturers of thermosetting resin matrix composites in China, and 51 of them have passed the ISO9000 quality system certification. There are more than 3000 varieties of products, with a total output of 730000 tons / year, ranking second in the world. The products are mainly used in construction, anticorrosion, light industry, transportation, shipbuilding and other industrial fields. In architecture, there are internal and external wall panels, transparent tiles, cooling tower, air conditioning cover, fan, FRP water tank, sanitary ware, purification tank, etc; In petrochemical industry, it is mainly used for pipeline and storage tank; In terms of transportation, there are mainly car body, hood, bumper and other accessories on the car, carriage plate, doors and windows, seats on the train, and hovercraft, lifeboat, reconnaissance boat, fishing boat and so on on on the boat; In the field of machinery and electrical appliances, such as roof fan, axial fan, cable tray, insulating rod, integrated circuit board and other products have considerable scale; In the aerospace and military fields, major breakthroughs have been made in light aircraft, tail, satellite antenna, rocket nozzle, bulletproof plate, bulletproof vest and torpedo.

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Thermoplastic resin matrix composites

Thermoplastic resin matrix composites were developed in 1980s, mainly including long fiber reinforced granular (LFP), continuous fiber reinforced prepreg (mitt) and glass fiber mat reinforced thermoplastic composites (GMT). According to different application requirements, the resin matrix mainly includes PP, PE, PA, PBT, Pei, PC, PES, peek, PI, Pai and other thermoplastic engineering plastics. The fiber types include glass fiber, carbon fiber, aramid fiber, boron fiber and other possible fiber varieties. With the continuous maturity of thermoplastic resin matrix composite technology and the advantages of recycling, the development of this kind of composite material is fast, and the thermoplastic resin matrix composites in developed countries in Europe and America have accounted for more than 30% of the total amount of resin matrix composites.

Most of the high performance thermoplastic resin matrix composites are injection parts, and the matrix is PP and PA. The products include pipe fittings (elbow, tee, flange), valves, impellers, bearings, electrical and automotive parts, extruded pipes, GMT molded products (such as jeep seat bracket), car pedals, seats, etc. The application of glass fiber reinforced polypropylene in automobile includes ventilation and heating system, air filter shell, gearbox cover, seat frame, fender gasket, drive belt cover, etc.

Talc Filled PP has high rigidity, high strength, excellent heat aging resistance and cold resistance. Talc reinforced PP has important applications in interior decoration, such as parts of ventilation system, instrument panel and automatic brake control lever, etc. for example, the sound-absorbing ceiling with honeycomb structure made of 20% talc Filled PP by HPM company of the United States and the rope barrel shell of car window lifter.

印度研发复合材料武装直升机

Mica / polypropylene composite has the characteristics of high rigidity, high thermal deformation temperature, low shrinkage, low flexibility, stable size, low density and low price. It can be used to make automobile instrument panel, headlamp protection ring, baffle cover, door guardrail, motor fan, shutter and other parts. The damping property of the material can be used to make audio parts, The battery box can be made by using its shielding property.

The research of thermoplastic resin matrix composites in China began in the late 1980s, and has achieved rapid development in the past decade. In 2000, the output reached 120000 tons, accounting for 17% of the total output of resin matrix composites. The matrix materials used are still mainly PP and PA, the reinforcement materials are mainly glass fiber, and a small amount of carbon fiber. There is no significant breakthrough in thermoplastic composites, There is still a gap with developed countries.

Composite material innovation

The innovation of composite materials includes the development of composite materials technology, composite materials technology, composite materials products and composite materials application. Specifically, we should grasp the innovation of resin matrix development, reinforced materials development, production technology development and product application development. By 2007, the proportion of Asia in the total sales volume of composite materials in the world will increase from 18% to 25%. At present, the per capita consumption in Asia is only 0.29kg, while that in the United States is 6.8kg. Asia has great growth potential.

Development of polyacrylonitrile based fiber

The development of carbon fiber industry in China is slow. From the development review and characteristics of CF, the development process of domestic carbon fiber, the market situation and characteristics of PAN based CF in China, and the situation of tackling key scientific and technological problems in the tenth five year plan, it is possible and necessary to develop polyacrylonitrile based fiber.

Adjustment of glass fiber structure

More than 70% of China's glass fiber is used as reinforced base material, which has a cost advantage in the international market. However, there is still a gap between China and advanced countries in terms of varieties, specifications and quality. It is necessary to improve and develop yarn, woven fabric, non-woven felt, woven fabric, seam woven fabric and composite felt, promote the close cooperation between glass fiber and glass fiber reinforced plastic industries, and promote the new development of glass fiber reinforced materials.

Composite market

First, composite materials for clean and renewable energy, including composite materials for wind power generation, composite materials for flue gas desulfurization device, composite materials for power transmission and transformation equipment, and high-pressure containers for natural gas and hydrogen; Second, composite materials for automobile and urban rail transit, including automobile body, frame and body outer covering parts, rail transit body, door, seat, cable trough, cable rack, grille, electrical box, etc; Third, composite materials for civil aircraft, mainly carbon fiber composite materials. Thermoplastic composites account for about 10%, and the main products are wing parts, vertical tail, nose cover, etc. In the next 20 years, China will need to add 661 regional aircraft, which will form a large industry of civil aircraft. Composite materials can be built into a new industry to match it; Fourth, composite materials for boats, mainly yachts and fishing boats. Yachts, as high-grade entertainment and durable consumer goods, have a large market in Europe and America. Due to the reduction of fish resources in China and the slow development of fishing boats, the unique advantages of composite materials still have room for development.

Infrastructure applications

Composite materials are widely used in bridges, houses and roads at home and abroad. Compared with traditional materials, they have many advantages, especially in bridges, house reinforcement, tunnel engineering and large storage repair and reinforcement.

Treatment and regeneration

Focus on the development of physical recovery (crushing recovery), chemical recovery (pyrolysis) and energy recovery, strengthen the technical route, comprehensive treatment technology research, demonstration production line construction, recycling research, vigorously expand the application of recycled materials in gypsum, pultrusion products, SMC / BMC molded products and typical products.

In the 21st century, the technology of high-performance resin matrix composites is an intelligent material which endows composites with self repairing, self decomposing, self diagnosing and self-made functions. Focusing on the development of composite materials with high stiffness, high strength and high humidity and heat environment, a material system integrating materials, forming processing, design and inspection is constructed. The organization system will be alliance and collectivization, which will make full use of all kinds of resources (technical resources, material resources) and closely link with the advantages of all aspects, so as to promote the further development of composite materials industry.