Rubber Seals Performance And Classification
Rubber Seals Physical properties of natural rubber. Natural rubber at room temperature with high elasticity, slightly plastic, with very good mechanical strength, hysteresis loss is small, in a number of deformation when the heat is low, so its resistance to flexability is also very good, and because it is non-polar Rubber, so electrical insulation performance is good.
Rubber Seals Usually we are talking about natural rubber, refers to the rubber from the collection of natural latex, through the solidification, drying and other processing processes made of solid. Natural rubber is a kind of polyisoprene as the main component of the natural polymer compounds, the formula is (C5H8) n, the rubber hydrocarbon (polyisoprene) content of 90% or more, also contains a small amount of protein, fatty acids , Sugar and ash and so on.
Physical properties of natural rubber. Natural rubber at room temperature with high elasticity, slightly plastic, with very good mechanical strength, hysteresis loss is small, in a number of deformation when the heat is low, so its resistance to flexability is also very good, and because it is non-polar Rubber, so electrical insulation performance is good.
Rubber, with plastic, fiber and known as the three synthetic materials, is the only highly scalable and excellent flexibility of the polymer material. The biggest feature of the rubber is that the modulus of elasticity is very small and the elongation is high. The second is that it has a very good resistance to breathability and resistance to a variety of chemical media and electrical insulation properties. Some special synthetic rubber has better resistance to oil and temperature, can resist fat oil, lubricating oil, hydraulic oil, fuel oil and solvent oil swelling; cold can be as low as -60 ℃ to -80 ℃, heat can be High to + 180 ° C to + 350 ° C. Rubber is also resistant to a variety of bending, bending deformation, because the hysteresis loss is small. The third feature of rubber is that it can be used with a variety of materials, blending, compound, and thus modified to get a good overall performance.
Rubber Seals These basic properties of rubber, it is an excellent industrial shock absorption, sealing, flexing, wear, corrosion, insulation and bonding materials.
A: The classification of rubber
1. According to raw material sources and methods
Rubber can be divided into two categories: natural rubber and synthetic rubber. Which consumption of natural rubber accounted for 1/3, synthetic rubber consumption accounted for 2/3.
2. According to the appearance of rubber
Rubber can be divided into solid rubber (also known as dry rubber), milky rubber (latex), liquid rubber and powder rubber four categories.
3. According to the performance and use of rubber
In addition to natural rubber, the synthetic rubber can be divided into general synthetic rubber, semi-general synthetic rubber, special synthetic rubber and special synthetic rubber.
4. According to the physical form of rubber
Rubber can be divided into hard plastic and soft, raw rubber and rubber and so on.
According to the type of rubber and cross-linked form, in industrial use, the rubber can be classified as follows.
A class of heat and oil and other functions are divided into: ordinary rubber, heat-resistant rubber, oil-resistant rubber and weather-resistant rubber, resistant to special chemical media, such as rubber.