Performance Of Rubber Seals
Generally speaking, the natural rubber, refers to the natural latex collected from the rubber tree, through solidification, drying and other processing processes made of solids. Natural rubber is a natural macromolecule compound with poly isoprene as the main component, the molecular formula is (C5H8) n, its rubber hydrocarbon (poly isoprene) content is above 90%, also contains a small amount of protein, fatty acid, sugar and ash and so on. Physical properties of natural rubber. Natural rubber at room temperature has a higher elasticity, slightly plastic, with very good mechanical strength, lag loss small, in many deformation when the heat is low, so its flexural flexibility is very good, and because non-polar rubber, so the electrical insulation performance is good. Rubber, with plastic, fiber and known as the three major synthetic materials, is the only highly scalable and extremely good elasticity of polymer materials. The biggest characteristic of rubber is that the elastic modulus is very small, and the elongation rate is very high. Second, it has a good air permeability and resistance to a variety of chemical media and electrical insulation performance. Some special synthetic rubber has good oil resistance and temperature resistance, can resist fat oil, lubricating oil, hydraulic oil, fuel oil and solvent oil swelling; hardy can be as low as 60 Shan to-80 Shan, heat-resistant can be high to Poite 180 to Perk. Rubber is also resistant to a variety of flex, bending deformation, because the lag loss is small. The third characteristic of rubber is that it can be used, blended and compounded with a variety of materials, which is modified to obtain good comprehensive performance.