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PU polyurethane

by:ORK      2022-10-25
PU Polyurethane CPU: Thermosetting polyurethane elastomer referred to as PU, English name Casting Polyurethane, commonly known as excellent glue, spring glue, is formed by the reaction of polymer polyol and isocyanate, chain extension and cross-linking, a kind of intermediate between plastic and rubber seals. of new synthetic materials. According to the different main chain structure of polyurethane elastomer, it is divided into two types: polyether type and polyester type. Polyether polyurethane: English name Polyether urethane. Polyether polyurethane occupies the most important position in polyurethane, mainly because of its low viscosity and convenient operation. Polyether is superior to polyester in terms of resilience, moisture evaporation, low temperature performance, impact strength, heat accumulation, water resistance, and mildew resistance. Polyester polyurethane: English name Polyester polyurethane, compared with polyether, its mechanical strength, tensile strength, tear strength, sliding friction, oil resistance, heat aging, adhesion to metal, solvent resistance and oxidation resistance are better than those of polyethylene. Ether type. However, polyester has high viscosity and is difficult to operate. Main features: Polyurethane elastomer has chemical corrosion resistance, tensile strength, high elasticity, high pressure load resistance, high abrasion resistance, strong shock absorption, tear resistance, radiation resistance, high strength, high load-bearing and shock absorption and cushioning. performance. High elasticity can be maintained over a wide hardness range (Shore A10 to Shore D75). Its excellent and unique comprehensive properties are not available in ordinary plastics and rubbers. Application fields: It is suitable for shock-absorbing pads, pads, springs of metallurgy, mining, petroleum, automobiles, building materials, sports, heavy machinery, large stamping equipment, and punching dies for various metal plates and pipes. The friction of general mechanical equipment acts as a buffer or shock absorber, and is an ideal die spring. https://www.orksealing.com/
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