Different products have different working conditions, and the requirements for silicone sealing rings are also different. Many products have certain regulations on temperature, among which cold resistance is a common working condition. Now we will show you how to improve the cold resistance of silicone sealing ring.
1. The cold resistance of silicone sealing ring depends entirely on rubber materials, and the key to cold resistance is to select good cold resistant materials.
2. Rubber is a common method to adjust the cold resistance in rubber formula design, which can improve the cold resistance of silicone seal ring.
3. Select medium effective curing system, and the glass transition temperature of rubber is 7 ℃ lower than that of traditional curing system. So NR and SBR The DCP sulfide has the best cold resistance. The thiuram sulfide reduces the cold resistance, while the sulfur/subsulfonamide accelerator has poor cold resistance.
4. When peroxides and radioactive sulfides are used, silica gel sealing rings have larger volume expansion coefficients than effective sulfide systems and traditional sulfide systems.
