The latest development direction of polyurethane i

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Brief introduction of the latest development direction of polyurethane in the wall field

when everyone is confident that China's polyurethane industry has entered the stage of rapid development, we should pay more attention to the future development direction of polyurethane, where the technology will accept the most difficult innovation challenges, and where the benefits will be maximized. In 2007, and even in the next few years, where should our perspective stay more? I hope to see the following articles and gain something

rigid polyurethane foam and building energy-saving rigid polyurethane

foam is the heat insulation product with the best heat insulation performance among all wall insulation materials at present, and it is also the most forward-looking heat insulation material in the world. The Department of science and technology of the Ministry of construction has established a working group for the promotion of the energy-saving application of polyurethane in buildings, and held the "international exchange meeting on energy-saving application technology of polyurethane walls" in Beijing on October 10, 2006. The meeting agreed that polyurethane material is the best insulation material in the world at present. It has excellent properties such as light weight, heat preservation, moisture-proof, sound insulation, heat resistance, can only use the same kind of fixture for both stretching and tightening, shockproof, corrosion resistance, easy to bond with other materials, combustion does not produce droplets and so on. At present, polyurethane rigid foam is mainly used in heat supply, refrigeration, shipbuilding, petroleum, chemical industry, automobile, transportation and other industries in China, and its share in building wall insulation is less than 10%. In developed countries such as Europe and the United States, about 49% of building insulation materials are polyurethane materials. With the further improvement of domestic building energy-saving standards, institutions and enterprises carrying out a series of research around the field of thermal insulation and energy conservation are also gradually increasing, and rigid polyurethane products will "expand their ambitions" in the construction field

polyurethane tire polyurethane elastomer is a kind of polymer synthetic material with both high hardness of plastic and high elasticity of rubber. Based on the excellent mechanical properties, the application of polyurethane elastomer in tires has been studied since the 1960s. In particular, cast polyurethane elastomer is the most wear-resistant elastomer at present. It has the advantages of coloring, high cutting resistance, vibration absorption, shock absorption, very large load-bearing capacity, excellent oil and chemical resistance, and has no toxic effect on human body. It can be completely biodegradable without adding carbon black and aromatic oil. It is an ideal material for manufacturing tire tread. Polyurethane tire is made by pouring process, and its structure is very different from that of currently produced tires. All polyurethane pneumatic tire is composed of carcass, belt and tread. There are two forms of some polyurethane pneumatic tires: one is the cast polyurethane tire body, and the tread is the rubber used to make ordinary tires by measuring and reading cracks in 24 hours; The other is that the carcass is meridian carcass, while the tread is polyurethane. Compared with ordinary steel radial tire, polyurethane pneumatic tire has the following advantages: (1) the average fuel consumption is 10% lower; (2) 51% lower tread wear; (3) 30% lighter; (4) The rolling resistance is lower than 35%; (5) The uniformity is better, and there will be no tread peeling

pu tires include full Pu wheels (PP type) and slightly deformed rubber outer tubes Pu inner tubes (RP type) when the force is applied to the sample, which are suitable for all kinds of electric driving AIDS, wheelchairs, children's trolleys, etc. Product advantages: good shock absorption, friction resistance, not afraid of nails, will not be discouraged, no tire repair, safety and money saving. However, there are still some problems to be solved in the research of polyurethane tires, such as improving the traction and braking performance of polyurethane tires, improving the hydrolysis resistance, and the multiple injection molding process of truck tires. In the process of developing polyurethane tires, high temperature resistance is the main factor affecting the practicality of polyurethane tires

waste polyurethane recycling and environmental protection is another major problem faced by the rising polyurethane industry. With the increasing use and consumption of polyurethane materials in the national economy, the recycling and reuse of its waste has been paid more and more attention. Waste polyurethane mainly includes the corner waste of the production plant, mold overflow, polyurethane foam and elastomer in waste cars and refrigerators, waste shoe soles and waste PU leather, spandex old clothes, etc. At present, there are three main methods for the recycling of polyurethane: physical method, chemical method and energy method

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