1.The shrinkage rate of the rubber sealing ring varies with the increase of rubber content and density of the vulcanized silicone material, usually with a value of 0.0013.

2.The shrinkage rate of the rubber sealing ring changes into a saddle shaped curve as the hardness of the rubber raw material increases.
3. The shrinkage rate of the silicone ring increases with the increase of vulcanization temperature in the silicone processing plant. When the temperature increases by 10 degrees, the shrinkage rate increases by 0.1% -0.2%.
4. The shrinkage rate of rubber products also increases with the increase of injection volume of raw materials. When the quality of rubber sealing ring raw materials reaches 5-10%, the shrinkage rate is relatively stable.
5. The shrinkage of the rubber mixture in the rolling direction and curing flow direction is greater than that in the vertical direction.
6. The better the plasticity of composite materials, the smaller the shrinkage; The higher the hardness of the compound, the smaller the shrinkage.
The more fillers are used, the smaller the shrinkage. The higher the adhesive content, the greater the shrinkage.
For porous cavity molds, the shrinkage rate of vulcanized silicone products in the middle cavity is greater than that of vulcanized products in the edge cavity.
9. The shrinkage rate of injection molded vulcanized products is lower than that of molding.
10. The shrinkage rate of thin products (with a cross-sectional thickness less than 3mm) is 0.2% to 0.6% greater than that of thick products (with a cross-sectional thickness greater than 10mm)