1. The shrinkage rate of Import rubber o-rings production factory products increases with the increase of the rubber content of vulcanized products;

　　2. The shrinkage rate of the rubber O-ring product changes with the hardness of the vulcanized product to form a saddle-shaped curve;

　　3. The shrinkage rate of Import rubber o-rings production factory products increases with the increase of vulcanization temperature;

　　4. The shrinkage rate of the rubber O-ring product increases with the increase of the injection amount of the raw material of the vulcanized product;

　　5. The shortening rate of the rubber material in the rolling direction and the moving direction in the mold is greater than the shortening rate in the vertical direction;

　　6. The better the plasticity of the compound, the smaller the shrinkage; the higher the hardness of the compound, the smaller the shrinkage;

　　7. The more filler the Import rubber o-rings production factory products use, the smaller the shrinkage rate; the higher the rubber content, the greater the shrinkage rate;

　　8. For a mold with a porous cavity, the shortening rate of the vulcanized product in the central cavity is larger than that of the vulcanized product in the marginal cavity;

　　9. The shortening rate of injection molding vulcanized products is slightly smaller than that of molding vulcanized products;

　　10. The shortening rate of thin products of Import rubber o-rings production factory products is 0.2%---0.6% larger than that of thick products;

　　11. Similar to the shortening rate of standard circular and square sections;

　　12. The more interlayer fabrics produced by Import rubber o-rings production factory products, the smaller the shortening rate;

　　13. The shrinkage rate of rubber O-ring products lined with metal inlays is small and shortens in the direction of metal inlays.