General Compounds

Polyurethane rubber is a range of elastomeric materials that contain more urethane groups in the polymer backbone. All rubbers have the highest wear resistance and high strength and good elasticity in the Shore A 60 to Shore A 70 range. Good cushioning, good oil and chemical resistance. Polyurethane has low affinity with non-polar mineral oils and is hardly corrosive in fuel oils (such as kerosene, gasoline) and mechanical oils (such as hydraulic oils, oils, lubricants, etc.), much better than general purpose rubber. It is comparable to nitrile rubber. The disadvantage is that the swelling properties of alcohols, esters, ketones and aromatics are large. The coefficient of friction is relatively high, usually above 0.5. Low temperature resistance, ozone resistance, radiation resistance, electrical insulation, good bonding performance.