The seal is a material or part that prevents the leakage of fluid or solid particles between adjacent mating surfaces and the invasion of external impurities such as dust and moisture into the interior of machinery and equipment. The storage chamber temperature of the seal shall be lower than 30 ℃ to avoid high temperature aging.
Although rubber plastic seal is small in size, its function makes it become the basic parts of national defense, chemical industry, petroleum, coal, transportation, machinery manufacturing and other major industries of national economy, which plays a very important role in the development of national economy. In recent years, with the rapid economic growth, rubber and plastic seal manufacturing industry has maintained a double-digit growth. Data shows that in 2011, the scale of rubber and plastic seal manufacturing industry in China (the above enterprises (according to the statistics of the National Bureau of statistics, the sales revenue is more than 20 million yuan) achieved a total industrial output value of nearly 10 billion yuan, an increase of more than 20% year on year. There are more than 150 enterprises with the scale of rubber and plastic seal manufacturing industry (annual income of 20 million yuan) in China. The domestic rubber and plastic seal industry generally presents the development trend of small scale and low technology level. From the perspective of enterprise economic types, private enterprises and foreign-funded enterprises account for more than 95%, which are the main economic types of the industry; at the same time, enterprises are basically concentrated in East China. In terms of the number of enterprises, sales revenue, asset scale, etc., East China has a considerable share and a high market share.
Classification by function: shaft seal, hole seal, dust seal, guide ring, fixed seal, rotary seal. Classification by material: tpbr, EPDM, Viton, silica gel, Viton, nylon, polyurethane, engineering plastics, etc.
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