What is the role of calcium carbonate in plastics?
Improving the dimensional stability of plastic productsThe addition of calcium carbonate plays a skeleton role in plastic products, and has a great effect on the stability of plastic product size.
Improve the processability of plasticsThe addition of calcium carbonate can change the rheological properties of plastics. Calcium carbonate powder, in addition to the amount of often larger, which will help it and other components of mixing, but also help plastic processing forming.
Improve the hardness and rigidity of plastic productsIn plastics, especially in soft PVC, the hardness increases with the amount of calcium carbonate, and the elongation decreases with the increase of hardness. Particle size, oil absorption value of calcium carbonate, hardness growth rate. Conversely, the particle crude oil absorption value of small calcium carbonate, plastic hardness growth rate is small. In soft PVC, calcium carbonate (light) is the next to the lowest hardness growth rate of heavy calcium carbonate.
