The main materials for O-rings include nitrile rubber, silicone rubber, fluororubber, and EPDM rubber. Nitrile rubber has good oil resistance, abrasion resistance, and tear resistance, making it suitable for sealing applications involving oily media in industries such as petroleum, chemical, and automotive. Silicone rubber has excellent high and low temperature resistance, a wide operating temperature range, and good electrical insulation and physiological inertness, commonly used in the food, medical, and electronics industries.
Fluororubber has excellent chemical corrosion resistance, high temperature resistance, and aging resistance, allowing it to be used in harsh chemical environments and high-temperature conditions, and is widely used in aerospace and chemical industries. EPDM rubber has good water resistance, weather resistance, and electrical insulation, and is relatively inexpensive, commonly used for sealing in industries such as construction and automotive, such as sealing car doors and windows. In addition, there are O-rings made of natural rubber and neoprene rubber. Natural rubber has good elasticity, good processing performance, and low cost, but poor oil resistance and weather resistance; neoprene rubber has good ozone resistance, weather resistance, and flame retardancy, making it suitable for applications requiring flame retardancy.
