The Advantages of Polyurethane Coated Product

The Advantages of Polyurethane Coated Product

1, the adjustable range of performance is large. A number of physical and mechanical performance indicators can be changed within a certain range through the selection of raw materials and the adjustment of the formula, so as to meet the different requirements of users for product performance. For example, hardness is often an important indicator of the user's products, polyurethane elastomers can be made into A soft printing roller with a hardness of about 20 Shore A, and can be made into a hard steel roll with a hardness of more than 70 Shore D, which is difficult to do with general elastomer materials. Polyurethane elastomer is a polar polymer material composed of many flexible and rigid chain segments. With the increase of the proportion of rigid chain segments and the increase of polar group density, the original strength and hardness of the elastomer will increase correspondingly.

2, excellent wear resistance. Especially in the presence of water, oil and other wetting media under working conditions, its wear resistance is often several times to dozens of times that of ordinary rubber materials. Metal materials such as steel, although very hard, but not necessarily wear-resistant, such as the Yellow River irrigation area of the large pump, the flow parts of the metal ring and protective ring after a large amount of sediment erosion, with no more than a few hundred hours on the serious wear and water leakage, and the use of polyurethane elastomer coated mouth ring and protective ring is continuously running 1800 hours without wear. Other such as rice huller rubber rolls for rice milling, vibrating screen plates for coal preparation, track tracks in sports fields, dynamic oil seals for crane forklifts, elevator wheels and roller skates wheels are also used in polyurethane elastomers. It should be mentioned here that in order to improve the friction coefficient of medium and low hardness polyurethane elastomers and improve the wear resistance under load, a small amount of lubricants such as aluminum disulfide, graphite or silicone oil can be added to such polyurethane elastomers.

3. Various processing methods and wide applicability. Polyurethane elastomers can be molded by plasticizing, mixing and vulcanizing processes (MPU) like general rubber; It can also be made into liquid rubber, casting molding or spraying, potting, centrifugal molding (referring to CPU); It can also be made into pellets, like ordinary plastics, molded by injection, extrusion, calendering, blow molding and other processes (referring to CPU). Molded or injection molding parts, within a certain hardness range, can also be cut, grinding, drilling and other mechanical processing. The diversity of processing makes the applicability of polyurethane elastomers very wide, and the application field continues to expand.

4. Oil resistance, ozone resistance, aging resistance, radiation resistance, low temperature resistance, good sound permeability, strong adhesion, excellent biocompatibility and blood compatibility. These advantages are the reason why polyurethane elastomers are widely used in military industry, aerospace, acoustics, biology and other fields.

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