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Analysis of the basic performance of rubber seals
Briefly analyze the basic performance of rubber seals:
Generally speaking, natural rubber refers to a solid latex obtained from a rubber tree, which is solidified and dried. Natural rubber is a natural polymer compound with polyisoprene as its main component. Its molecular formula is (C5H8)n, its rubber hydrocarbon (polyisoprene) content is above 90%, and it also contains a small amount of protein and fatty acid. , sugar and ash, etc.
The physical properties of natural rubber. Natural rubber has high elasticity at room temperature, slightly plasticity, very good mechanical strength, low hysteresis loss, low heat generation during multiple deformations, so its flex resistance is also good, and because it is non-polar Rubber, so electrical insulation performance is good. [1]
Rubber, similar to plastics and fibers, is called the three major synthetic materials and is the only polymer material with high flexibility and excellent elasticity. The biggest characteristic of rubber is firstly that the modulus of elasticity is very small and the elongation is high. Secondly, it has quite good gas permeability resistance and resistance to various chemical media and electrical insulation properties. Some special synthetic rubbers have good oil resistance and temperature resistance, and can resist swelling of fatty oils, lubricating oils, hydraulic oils, fuel oils and solvent oils; cold resistance can be as low as -60 ° C to -80 ° C, heat resistance can be Up to +180 ° C to +350 ° C. The rubber is also resistant to various flexing and bending deformations because the hysteresis loss is small. The third characteristic of rubber is that it can be used in combination with a plurality of materials, blended, and composited, thereby being modified to obtain good overall properties.
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