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Polyurethane elastomer is a kind of polymer between rubber and plastic. It has excellent wear resistance and is called "king of wear". It has excellent wear resistance (5~10 times for natural rubber, compared with Ding Benzene rubber is 3 times higher; excellent mechanical properties, high mechanical strength (2~3 times that of natural rubber); its mechanical properties such as tensile strength, elongation at break and tear strength are much better than ordinary Rubber material; has a wide range of hardness adaptability, can maintain high elasticity in a wide range of hardness (Shore A10 ~ Shore D98), and still has high elasticity under high hardness (this is another rubber plant No characteristics); high surface finish; superior machinability; metal adhesion is also much higher than ordinary rubber, more suitable for a certain line speed and high pressure; secondly has a wider modulus (material is under stress) The ratio of stress to strain in the state, the modulus is between ordinary rubber and plastic; the grease resistance is superior (oil resistance is 3-5 times that of butyl rubber), and the chemical resistance is better. The oil resistance of polyurethane products is better than that of cyanide rubber; the aging resistance is better than that of natural rubber and other synthetic rubber; it is resistant to hydrolysis, acid and alkali. The polyurethane rubber roller has good chemical properties. In addition, the polyurethane product has excellent radiation resistance and ozone resistance; and the low temperature resistance is good. The temperature range of the article for continuous operation for a long time is generally 80-90 degrees, and the temperature for short-term use can reach 120 °C.