Development and types of building insulation mater

2022-07-29
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Recent experts have redefined green materials - materials that have the lowest environmental load on the earth and are conducive to human health in the process of raw material adoption, product manufacturing, use or recycling and waste disposal, also known as "environmental coordination materials"

good thermal insulation technology and materials used in construction and industry can often achieve twice the result with half the effort. Statistics show that every ton of mineral wool insulation products used in buildings can save one ton of oil a year. The application of Beijing Anyuan Beili energy saving community shows that the coal saving rate per unit area is 11% per year. 91kg standard coal/m2. For the thermal insulation of industrial equipment and pipelines, good thermal insulation measures and materials can significantly reduce production energy consumption and cost, improve the environment, and have good economic benefits. For example, in industrial equipment and pipeline engineering, good thermal insulation conditions can reduce the heat loss by about 95%. Generally, the investment in thermal insulation materials can be recovered by saving energy for about one year

before 1980, the development of thermal insulation materials in China was very slow. A few thermal insulation materials factories could only produce a small amount of expanded perlite, expanded vermiculite, slag cotton, ultra-fine glass cotton, microporous calcium silicate and other products. There were few mineral wool factories with a production capacity of less than 10000 tons. There were only three bulk cotton and calcium silicate thermal insulation materials with an annual output of 8000 cubic meters. The quantity and quality of the products can not meet the requirements

the comparison of the main energy-saving thermal insulation materials is as follows:

mineral wool and products mineral wool is a kind of high-quality thermal insulation material, which has been produced and applied for more than 100 years

1840, Britain first discovered that molten slag formed fibers after blowing, and produced slag cotton; In 1880, Germany and Britain began to produce slag cotton. Later, other countries began to use and produce it successively. In the 1930s, large-scale production and application began; From 1960 to 1980, mineral cotton developed most rapidly in the world; Since 1980, the output of mineral wool products in the world has been at a relatively stable stage. The main reason is that the development of other thermal insulation materials such as glass wool and foam plastics has accelerated, and the development speed of developed countries has slowed down. In recent years, the annual output of mineral wool products in the world is about 8million tons. Mineral wool is most widely used in buildings, such as 85% in the UK, 70% in Germany, 92% in Japan and more than 90% in the United States

in the early 1980s, China introduced a 16300 ton production line from Sweden in Beijing. China's thermal insulation materials have taken a big step forward in the direction of large-scale, better performance and more complete varieties and specifications. Subsequently, Harbin, Taiyuan, Hohhot, Qiqihar, Urumqi, Dongguan, Yinchuan, Xining, Shanghai and Beijing were successively introduced from Sweden, Japan, Australia, Italy, Britain and Poland, and China built a production line in Nanjing. There are 80 with a production capacity of 3000 tons/year, about 180 production enterprises and a design capacity of 550000 tons

rock wool production technology: the uniformity of rock wool produced by small factories is poor; The introduced equipment can automatically adjust the cotton distribution speed and thickness, with more cotton output and faster driving wheel speed, which has a proportional relationship. Therefore, it supports the development of new traffic concepts such as electric vehicles and automatic driving. Large factories have uniform rock wool unit weight and less slag ball content

glass wool and its products a kind of heat insulation material with light volume weight and good heat insulation performance has emerged after the rock wool Jinan new period gold testing instrument Co., Ltd. is a manufacturer specializing in the production of experimental machines. Japan's 90 year output is 20. 50000 tons, the output of the United States in 1985 192. 50000 tons, France's 1984 output 11. The existing change experiment can only record semi quantitative indicators such as the number of twist turns. 50000 tons. Before the 1980s, there were only a few small ultra-fine glass wool factories in China, with a single variety and poor quality. In the middle of the 1980s, Shanghai and Beijing introduced nitong textile technology and equipment, and produced them by centrifugal injection method. The products include: board, felt, shell, decorative ceiling, etc

features: light weight, generally kg/m3, felt below 20kg/m3, medium hard board kg/m3, hard board kg/m3, of which 48kg/m3 can be used as ceiling, 8. Digital display resolution: 0.1 ℃ softening point is about 500 ° C, insulation is 300 ° C, large amount in the United States, k=0. 9。

calcium silicate thermal insulation products were successfully developed in China in the 1970s. They have the characteristics of high compressive strength, low thermal conductivity, convenient construction and can be used repeatedly. They are widely used in power systems

at the end of 1994, there were nearly 50 production enterprises in China, with a total design production capacity of nearly 300000 square meters. At present, only more than 30 enterprises can maintain normal production, with an annual output of about 150000 square meters. Its application was impacted by mineral cotton. In addition, the price was high and the publicity was weak. In recent years, the sales were poor, which restricted the production

application: high temperature resistance, relatively low price, the biggest defect is that it is easy to crack after thermal expansion, and the weld dislocation; There is room for hot air to come out and cold air to go in. Although the temperature of the external protection surface is not high, the heat loss is large

aluminum silicate fiber aluminum silicate fiber, also known as refractory fiber, is mainly used as kiln insulation material. It was successfully developed in China in 1971. At present, there are about 200 production enterprises, with a total production capacity of more than 40000 tons per year and an annual output of nearly 20000 tons. There are many varieties, mainly including ordinary aluminum silicate fiber, high-purity aluminum silicate fiber, high aluminum fiber, aluminum containing fiber and a small number of products in China, all of which are medium and low-grade products; Polycrystalline mullite fiber, polycrystalline alumina fiber, polycrystalline zirconia fiber and other high-end products

most domestic products are generally produced in small workshops, and then four production lines have been successively introduced from the United States. The process technology is advanced, and the quick dissolving and rapid spinning into fiber, dry needled felt, with stable quality and temperature resistance of ° C

features: acidity derivative 2. 0 or above, high temperature resistant, general chemical pipeline is more than 1000 ° C, so this material must be used. The dissolution temperature is about 2000 ° C

foamed plastic is a plastic product based on synthetic resin with numerous small holes inside. It has the advantages of low thermal conductivity, processing and molding, and has just begun to be used in buildings. It is mainly used for insulation of packaging industry (such as refrigerator), underground directly buried pipeline and cold storage

the main products are polystyrene foam and polyurethane foam, but there are problems in the application in the construction field. In recent years, it has been used for steel wire sandwich panels and color steel plate composite sandwich panels. Although there are certain restrictions, it has developed rapidly. With the increasingly strict requirements for building fire protection materials, new topics have been put forward for the application of this material

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