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What are the performance characteristics and shortcomings of silicone rubber oil seals?

Release time:

2019-04-27 12:30

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What are the performance characteristics and shortcomings of silicone rubber oil seals?
Oil seal due to the use of the environment and the conditions of different occasions
The medium of the rubber seal material used in the oil seal is different, which also determines the environment and occasions for the use and application of the oil seal developed and produced. In the industry, several rubber seal materials for oil seal are developed and produced. The rubber type includes nitrile rubber seal materials, acrylic and fluorine rubber seal materials, the seal materials that can be selected in addition to rubber include silicone rubber seal materials, polyurethane, hydrogenated nitrile rubber materials, and polytetrafluoroethylene rubber seal materials (for oil seal lip parts).
Silicone rubber (Silicone rubber; MQ for short;) refers to the rubber whose main chain is composed of silicon and oxygen atoms alternately, and the silicon atoms are usually connected with two groups.
The introduction of phenyl can improve the high and low temperature resistance of silicone rubber, and the introduction of trifluoropropyl and cyano can improve the temperature resistance and oil resistance of silicone rubber. Silicone rubber has good low temperature resistance and can generally work at -55°C.
What are the characteristics of oil seals made of 1. silicone rubber? The main characteristics of the oil seal made of silicone rubber are that it can maintain its rubber elasticity effect for a long time in the range of -100 degrees Celsius to 300 degrees Celsius. It can work for several hours at 400 degrees Celsius and has excellent high temperature resistance. In addition, it has excellent Thermal stability, electrical insulation, weather resistance, ozone resistance, air permeability, high transparency, excellent heat dissipation, and excellent adhesion, fluidity and mold release, in the use of temperature range, silicone rubber does not have the power to maintain a certain degree of flexibility, resilience and surface hardness and mold release, in the use of temperature range, silicone rubber does not have the power to maintain a certain degree of flexibility, resilience and surface hardness, mechanical properties have not changed significantly, and can be low resistance to long-term thermal aging.
2. silicone rubber oil seal is the disadvantage of low mechanical strength, tear strength, abrasion resistance, oil resistance and solvent resistance, vulcanization molding when the size of the shrinkage, the production is not easy to control the size.
3. some special silicone rubber has excellent oil resistance, solvent resistance, radiation resistance and use at low temperatures and other characteristics. Among them, fluorosilicone rubber, on the basis of the excellent performance of silicone rubber, also has the characteristics of oil resistance, solvent resistance, chemical resistance, etc., so that the application of silicone rubber can be expanded to various oil media, acid media, and chemical solvent media. In the environment, it is an elastomer that can be used in fuel media ranging from -60 degrees Celsius to 230 degrees Celsius. It is a promising engine seal material.
However, similar to silica gel, it has poor strength, low surface energy, belongs to the material that verifies bonding, and has processing, etc.
4. oil seals made of silicone rubber are used in what industry areas? Due to the special properties of silicone rubber oil seals, are widely used in instrumentation, electronic appliances, navigation, metallurgy, machinery, automobiles, health and other parts of the seal.

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What is the difference between silicone plug and rubber plug

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What are the molding techniques of rubber products?

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