We know that adding calcium carbonate to plastics can reduce the shrinkage of the resin, change the rheology, and control the viscosity, which is very helpful to improve the quality of the plastic. So, what other role does it play in plastics?

1. Improve the hardness and stiffness of plastic products

In plastics, especially as soft polyvinyl chloride, the hardness increases with the gradual development of the amount of calcium carbonate, and the elongation decreases as the hardness increases. Calcium carbonate with fine particles and high oil absorption has a large increase in hardness. Conversely, the hardness and growth rate of plastic are small.

Generally speaking, calcium carbonate plastic (resin) cannot play a reinforcing role, and its particles tend to be penetrated by the resin, so its effect is to increase the hardness, elastic modulus and hardness of the resin.

2. Improve the dimensional stability of plastic products

The addition of calcium carbonate can play a role as a skeleton in plastic products, and has a great influence on the dimensional stability of plastic products.

3. Improve the heat resistance of plastic products

Adding calcium carbonate to general plastic products can improve heat resistance.

4. Reduce the cost of plastic products

The prices of ordinary light calcium carbonate and heavy calcium carbonate are far lower than the price of plastic products, and the addition of calcium carbonate will reduce the cost of plastic products.

5. Good plastic processing performance

The addition of calcium carbonate can change the fluid properties of the plastic. Calcium carbonate powder is often added in a relatively large amount, which helps it to be mixed with other ingredients and also helps plastic processing and formation.

6. Improve the astigmatism of plastics

Among plastic products, some products require whitening and opacity, while other products require matting. The addition of calcium carbonate can play a certain role in this regard.

7. It can make the product have some special properties

Adding calcium carbonate to the cable material has a certain insulating effect, and can also change the electroplating performance and printing performance of some products.

The above is the whole content of the role of calcium carbonate in plastics introduced by the editor. I hope you can have a better understanding of it after reading it.