What factors are generally related to the shrinkage rate of rubber O-rings?

As a good sealing material, rubber O-rings are often used as sealing products. The shrinkage rate of rubber O-rings is also very important. What factors are generally related to the shrinkage rate of rubber O-rings?

1. It is related to the vulcanization temperature, the higher the temperature, the greater the shrinkage;

2. The smaller the filling amount of rubber products, the greater the shrinkage rate;

3. The greater the glue content of the vulcanized product, the greater the shrinkage rate;

4. It is worth mentioning that when the forming mold is a porous cavity, the shrinkage of the vulcanized O-ring in the middle cavity is larger than that of the vulcanized product in the edge cavity;

5. The shrinkage rate of the rubber material in the calendering direction and the flow direction in the mold is generally greater than the shrinkage rate in the vertical direction;

6. The shrinkage rate of the O-ring with a small wire diameter is larger than that of the large wire diameter o-ring;

7. The lower the hardness of the sealing ring, the worse the plasticity of the rubber compound and the greater the shrinkage rate.