Basic performance of rubber seals
Release time:
2022-03-25
Usually we say the natural rubber, refers to the natural rubber latex collected from the rubber tree, the solid material made by coagulation, drying and other processing processes. Natural rubber is a natural polymer compound with polyisoprene as the main component. The molecular formula is (C5H8)n. Its rubber hydrocarbon (polyisoprene) content is more than 90%, and it also contains a small amount of protein, fatty acid, sugar and ash.
Usually we say the natural rubber, refers to the natural rubber latex collected from the rubber tree, the solid material made by coagulation, drying and other processing processes. Natural rubber is a natural polymer compound with polyisoprene as the main component. The molecular formula is (C5H8)n. Its rubber hydrocarbon (polyisoprene) content is more than 90%, and it also contains a small amount of protein, fatty acid, sugar and ash.
Physical properties of natural rubber. Natural rubber has high elasticity at room temperature, slightly plastic, has very good mechanical strength, hysteresis loss is small, and heat generation is low during multiple deformations, so its flexibility resistance is also very good, and because it is non-polar rubber, So the electrical insulation performance is good. [1]
Rubber, with plastic, fiber and called the three synthetic materials, is the only polymer material with high flexibility and excellent elasticity. The biggest characteristic of rubber is that the modulus of elasticity is very small, and the elongation is very high. The second is that it has quite good resistance to air permeability and resistance to various chemical media and electrical insulation. Some special synthetic rubber has good oil resistance and temperature resistance, can resist the swelling of fatty oil, lubricating oil, hydraulic oil, fuel oil and solvent oil; cold resistance can be as low as -60 ℃ to -80 ℃, heat resistance can be as high as 180 ℃ to 350 ℃. Rubber is also resistant to various bending, bending deformation, because the hysteresis loss is small. The third feature of rubber is that it can be used, blended and compounded with a variety of materials, and thus modified to obtain good comprehensive properties.
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