New building materials

Recently, the experts re-define the green in the raw material --- to take the product manufacture, use or recycling and waste treatment and other aspects of the minimum load on the Earth's environment is conducive to human health and materials, also known as' environmental coordination materials '.
Used in the construction and industrial sound insulation techniques and materials often play a multiplier effect. Statistics show that the use of one ton for every building in mineral wool insulation products, save one ton of oil a year. Beijing Court North in residential energy use shows that the rate of coal per unit area of ​​11.91 kilograms of standard coal per year / square meter. Industrial equipment and pipe insulation, sound insulation measures and the use of materials, can significantly reduce energy consumption and cost, improve the environment,PVC ceilings and better economic efficiency. Such as: industrial equipment and plumbing in good condition insulation, can reduce heat loss around 95%, usually for about a year investment in insulation materials can be recovered through energy savings.
Prior to 1980, the development of insulation materials in China is very slow, one of the few insulation materials plant to produce only a small amount of expanded perlite, expanded vermiculite, slag wool, fine wool, porous calcium silicate products,plastic mold mineral wool Few plants, production capacity is insufficient tons scattered cotton, calcium silicate insulation materials and only three, annual output of 8,000 cubic meters. Product quantity, quality can not meet all requirements.
Major energy-saving insulation contrast to the situation as follows:
Mineral wool and mineral wool products is a high-quality insulation materials, production and application of more than 100 years of history.
1840 British first discovered after injection of the slag melt to form fibers, and to produce slag wool; 1880 Germany and Britain began producing slag wool, have been used only after other countries, and production of the 1930s large-scale production and application; 1960 to 1980, the world's most rapid development of mineral cotton; 1980 so far, the international production of mineral wool products in a relatively stable stage, mainly due to other insulation materials such as glass wool, foam accelerated development,container house coupled with the developed countries development slowed down in recent years, the world's annual production of mineral wool products, about 800 million tons, mineral cotton, the most widely used in construction, such as the United Kingdom accounted for 85%, Germany 70%, 92% in Japan, the United States more than 90%.
The early 1980s, Beijing China Sweden 16,300 tons imported production line, insulation material to the scale of China's performance is more excellent, more complete specifications of the direction of a big step forward. Subsequently, Harbin, Taiyuan, Hohhot, Qiqihar, Urumqi, Dongguan, Yinchuan, Xining, Shanghai, Beijing one after another from Sweden, Japan, Australia, Italy, Britain, Poland introduced, China has built a production line in Nanjing. Production capacity of 3,000 tons / year will have 80, producing about 180 enterprises, design capacity 55 tons.
Wool Production Technology: small factories producing poor uniformity of rock wool; imported equipment Bumian automatically adjust the speed and thickness,stainless steel pipe the cotton and more active wheel speed fast, there is a proportional relationship, so manufacturers of mineral wool uniform bulk density, low shot content.
Glass wool and rock wool products, following after the emergence of a light weight, good insulation properties of thermal insulation materials. Japan's annual output of 205,000 t 90, the U.S. annual production of 1.925 million tons 1985, the French 1984 annual output 115,000 tons. 80 years ago only a few ultra-fine glass wool in China a small factory, a single species, poor quality, mid-80, Shanghai, Beijing introduced Nitto spinning technology and equipment, using centrifugal injection method of production, products: plate, mat, shell, decorative ceilings.
Features: Light weight, general 10-96kg/m3, 20kg/m3 following felt ,24-48kg / m3 as the hard boards ,48-96kg / m3 as a hard board, which 48kg/m3 do the ceiling, softening point of 500 ° C. or so, heat 300 ° C., the United States a larger amount, k = 0.9.
Calcium silicate insulation products, the successful development of the domestic 70 years, with high compressive strength, thermal conductivity, construction convenient, reusable features, is widely used in the power system.
The end of 1994, there were nearly 50 manufacturers, with a total design production capacity of nearly 30 million square meters, able to maintain normal production of only 30 more than the annual output of about 15 million square meters, its application has been the impact of mineral cotton, combined with higher prices, lack of advocacy, poor sales in recent years, the production will be restricted.
Applications: high temperature, the price is relatively low, the biggest flaw is its easy to crack after thermal expansion, weld dislocation; room in the hot air coming out, cold air inside, while the outer retaining surface temperature is not high, but the heat larger losses.
Ceramic fiber ceramic fiber, also known as fire-resistant fiber, mainly used as furnace insulation materials, developed in China in 1971, currently produces about 200 enterprises, with a total production capacity of more than 40,000 tons / year, annual output of nearly 2 million tons . More varieties, the major domestic ordinary ceramic fiber, high-purity aluminum silicate fiber, alumina fiber and aluminum-containing fibers and a small amount of products, are low-end products; polycrystalline mullite fiber, polycrystalline alumina fibers polycrystalline zirconia fiber and other high-end products.
Most generally small cottage country, and then have four production lines imported from the United States, advanced technology, instant-speed thrown into the fiber, needle felt dry, stable quality, can be temperature 800-1250 ° C..
Features: acid derivative 2.0 above, high temperature, 1000 ° C. and more general chemical pipelines, must use this material. Melting temperature of 2000 ° C. or so.
Foam is made of synthetic resin-based, with numerous small holes inside the plastic, it has low thermal conductivity, processing, molding, etc., in the building had just started. Mainly used for packaging industry (such as refrigerators), buried underground pipe insulation, cold cold.
The main products of polystyrene foam and polyurethane foam, but the construction field application problems. In recent years, materials used in steel mesh sandwich panel, color steel composite sandwich plates, although there are certain restrictions, but rapid development, with the fire protection of materials, increasingly stringent requirements,rubber gasket the application of the material raised new issues.