1. The shrinkage rate of low price moulded rubber o-rings products increases with the increase of the rubber content of the vulcanized products.
2. The shrinkage rate of the Low price moulded rubber o-rings product changes with the increase of the hardness of the vulcanized product to form a saddle-shaped curve.
3. The shrinkage rate of low price moulded rubber o-rings products increases with the increase of vulcanization temperature, and the shrinkage rate increases by 0.1%-0.2% for every 10 degree increase in temperature.
4. The shrinkage rate of low price moulded rubber o-rings products increases with the increase of the injection amount of raw material for vulcanized products. When the raw material quality is 5%-10% greater than the product quality, the shrinkage rate is relatively stable.

5. The shrinkage rate of the rubber compound in the calendering direction and the flow direction in the mold is greater than the shrinkage rate in the vertical direction.
6. The better the plasticity of the rubber compound, the smaller the shrinkage rate; the higher the rubber compound hardness, the smaller the shrinkage rate (except for high hardness).
7. The larger the amount of filler, the smaller the shrinkage rate; the higher the glue content, the greater the shrinkage rate.
8. For a mold with a porous cavity, the shrinkage rate of the vulcanized product in the middle cavity is larger than that of the vulcanized product in the edge cavity.
9. The shrinkage rate of injection molding vulcanized products is slightly smaller than that of molding vulcanized products.
10. The shrinkage rate of thin products (section thickness less than 3mm) is 0.2%---0.6% larger than that of thick products (section thickness above 10mm).