The hottest sandwich composites have a huge market

2022-08-19
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Sandwich composite materials have a huge market capacity in China

the sandwich composite industry is a new material industry, which is the key industry encouraged by the national industrial policy in the future, and plays an important role in the national economy. With the increasing attention of the state to the new material industry, sandwich composites will develop rapidly in terms of output, sales, production technology, production process, new product research and development, etc

the rapid development of composites in recent decades lies in its "light and high-strength" characteristics, and the design concept of sandwich structure shows people the magical charm of composites "lighter and stronger"

the sandwich composite industry belongs to the new material industry, which is the key industry encouraged by the national industrial policy in the future, and plays an important role in the national economy. With the increasing attention of the state to the new material industry, sandwich composites will develop rapidly in terms of output, sales, production technology, production process, new product research and development, etc

commonly used sandwich materials

at present, the sandwich materials used in composite sandwich structures mainly include: hard foam, honeycomb and light wood. Rigid foam mainly include polyvinyl chloride (PVC), polyurethane (PU), polyetherimide (PEI), acrylonitrile styrene (San or as), polymethylmethacrylimide (PMI), thermoplastic polyethylene (PET), etc

honeycomb sandwich materials include glass cloth honeycomb, Nomex honeycomb, cotton honeycomb, aluminum honeycomb, etc. The honeycomb sandwich structure has high strength and good rigidity, but the honeycomb is a perforated structure, and the bonding area with the upper and lower panels is small, and the bonding effect is generally not as good as that of foam

light wood sandwich material is a natural product. Balsa wood is a common light wood sandwich in the market. Balsa light wood is mainly produced in plantations in South America. Due to climate reasons, balsa wood grows very fast locally, so it is much lighter than ordinary wood, and its fiber has good strength and toughness, which is especially suitable for composite sandwich structures

application fields

sandwich materials have a wide range of applications, involving transportation, wind power, aerospace, shipbuilding, construction and other fields

-- transportation

sandwich structural materials are mainly used in structural floor, roof, side plate and rear of rail transit vehicles. Their main advantages are that they can reduce body weight, heat preservation, sound insulation and noise reduction, enhance safety and save fuel costs

according to the medium and long term railway plan approved by the State Council, China will plan to build fast passenger transport channels between provincial capital cities and large and medium-sized cities. The specific contents include the construction of passenger dedicated lines of more than 12000 kilometers, the planning of "four vertical and four horizontal" railway rapid passenger transport channels and three intercity rapid passenger transport systems, and the target speed of passenger cars to reach more than 200 kilometers per hour. By 2012, China will build a "four vertical and four horizontal" high-speed railway line. It is estimated that 300 km/h multiple units (8-car marshalling) will be required every year from 2010 to 2020. In addition, urban rail transit is also one of the ideal development directions of urban transportation in the future. The construction of metro rail transit in China is in a period of continuous rise. At present, in addition to Hong Kong and Taiwan, 10 cities in China, including Beijing, Shanghai, Guangzhou, Shenzhen, Wuhan, Tianjin, Nanjing, Chongqing, Changchun and Dalian, have built subway rail transit lines and put them into operation. After 2010, about 3500 rail transit cars are required every year. According to the existing technical parameters, a single EMU carriage needs 0.2 tons of structural foam material, and one EMU needs 1.6 tons of structural foam material according to 8-car marshalling. On the whole, the annual demand of railway and urban rail transit for structural foam will gradually reach about tons after 2010

-- wind power

sandwich material is one of the key materials of wind power blades. In order to increase structural stiffness, prevent local instability, and improve the load resistance of the entire blade, sandwich structure is generally used at the leading edge, trailing edge, shear rib and other parts of the blade. At present, the sandwich materials used for blades mainly include PVC hard foam and B, whose crack growth rate is close to that of V-notch impact specimen breaking under impact force. Alsa light wood, pet foam and San foam, and the cost of sandwich materials accounts for about 20% of the total cost of blade materials. In addition, engine room covers are increasingly made of foam sandwich composite materials

China is rich in wind energy resources, and the exploitable wind energy reserves are about 1billion kW, of which the wind energy reserves on land are about 253million kW (calculated by the data of 10m above the ground on land), and the offshore exploitable and exploitable wind energy reserves are about 7, analysts believe 500million kW, a total of 1billion kW, with great development potential. According to the information released by the Global Wind Energy Council (GWEC), China's installed capacity of wind power increased from 12.1 gigawatts in 2008 to 25.1 gigawatts. China's new installed capacity has achieved 100% growth for five consecutive years. In 2009, China's new installed capacity accounted for one third of the world

from the actual development of the industry in the past two years and relevant national plans, China will maintain an annual new installed capacity of about 10million kW after 2010, and the total installed capacity will reach by 2020 200million kW

according to the relevant national policies, it is expected to increase the installed capacity of 10million kW every year from 2010 to 2020. Based on the average unit capacity of 1.5MW, 6700 sets of wind turbines will be added every year, and the working principle is 20000 wind turbine blades. Calculated by 0.6 tons of sandwich material required for each wind turbine blade, 20 this enables 3D printing materials to be reshaped, repaired and recycled. In 10 years, the wind power industry will have an annual demand for sandwich materials of 12000 tons

-- other industries

the demand for sandwich materials in the aviation industry also accounts for a certain market share. With the launch of domestic large aircraft projects, the demand for sandwich materials will grow rapidly in the future. It is expected that after 2011, the market demand for sandwich materials in the aviation industry will gradually reach tons

ships and yachts are also one of the widely used fields of sandwich materials, which are usually used in the bottom, side, deck, bulkhead and superstructure. It is expected that the annual demand for sandwich materials in the shipbuilding and yachting industry will gradually reach about 500 tons after 2010

with the concept of low-carbon emission reduction becoming more popular, energy-saving building materials made of sandwich materials have also begun to be more used in building curtain walls, which can reduce the weight of the wall, improve the effect of wall heat insulation, and have good sound insulation, flame retardancy and corrosion resistance. At present, China's annual new construction area is about 2billion square meters, of which the completed area of building curtain wall is 75million square meters, and the area of using sandwich materials is 22.5 million square meters. It is expected that the demand for sandwich materials in the construction industry will gradually increase after 2010, and it is expected that the demand will reach about 6000 tons by 2012

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