Characteristics of silicone sealing ring
The silicone sealing ring has excellent heat resistance, low-temperature elasticity, and particularly excellent resistance to oxidation and ozone, with high breathability and selectivity for gas transmission. Good electrical insulation performance (volume resistance greater than 10 Ω. cm, breakdown voltage above 30kV/mm), corona resistance and arc resistance. However, by adding conductive carbon black, nickel powder, aluminum powder, and silver powder, appropriate conductivity can be obtained (volume resistance can reach 5-0.02 ohm. cm). The surface energy of the silicone sealing ring is relatively low, and it has hygroscopicity, which can play a role in isolation. Water resistance, but poor resistance to water vapor. It is not recommended to use when the pressure exceeds 50psi. Compatible with most oils, chemicals, and solvents. Generally, silicone rubber has good acid and alkali resistance, acceptable resistance to polar solvents, and is not resistant to alkanes and aromatic oils. It is not recommended to use in most concentrated solvents, oils, concentrated acids, and diluted caustic solutions.
Silicone rubber sealing rings have much better heat resistance than ordinary rubber, and can be used almost permanently at 150 ° C without any performance changes. They can be used continuously for 10000 hours at 200 ° C and for a period of time at 350 ° C. It is widely used in occasions where heat resistance is required, such as sealing ring of hot water bottle, heat resistant handle of Pressure cooking ring.
Silicone rubber is a highly active adsorption material, which is an amorphous substance. Its chemical Molecular formula is mSiO2 • nH2O. Insoluble in water and any solvent, non-toxic and odorless, chemically stable, and does not react with any substance except strong bases and hydrofluoric acid. Various types of silicone sealing rings form different microporous structures due to their different manufacturing methods. The chemical composition and physical structure of silicone sealing ring determine that it has many characteristics that other similar materials cannot replace: high adsorption performance, good thermal stability, stable chemical properties, high mechanical strength, etc.
Usage of silicone sealing ring
Silicone sealing ring is mainly used for waterproof sealing and fresh-keeping of daily articles such as fresh-keeping box, Rice cooker, Water dispenser, lunch box, incubator, incubator, water cup, oven, magnetized cup, coffee pot, etc.
Function of silicone sealing ring
1. Silicone sealing ring has extremely high-quality sealing performance, which can achieve complete sealing and prevent a drop of water from entering the sealing space.
2. The silicone sealing ring has excellent tensile resistance and can achieve continuous cracking and deformation under very strong tensile force.
3. Silicone sealing rings have excellent resistance to corona, arc, high and low temperatures. In addition, silicone sealing rings also have good aging resistance. Very in line with national standards.
4. However, silicone sealing rings cannot be used in most of the thickened solvents and oils, or in thickened acids and sodium hydroxide.
5. The silicone sealing ring also has excellent electrical insulation performance, even under high temperature conditions, it will not be affected in any way.
6.The silicone sealing ring has better elasticity than ordinary rubber, and can maintain good elasticity even at minus 60 to 70 degrees.
7. Compared to other products of the same type, silicone sealing rings can be used for a long time without any change in color, yellowing, or fading.
8. Silicone sealing ring has a very good insurance effect, which can maintain the freshness of food or other items that need to be kept fresh very well. Moreover, this product does not produce any harmful substances, and is a completely non-toxic, harmless, green, healthy, and environmentally friendly product.
9. The silicone sealing ring has a very strong adaptability to the environment, and can be placed under strong temperature for heating, maintaining its original shape and state, completely without deformation, and without producing any harmful substances in high temperature environments.
Post time: Jul-11-2023