Talc powder and calcium carbonate are both used for filling. Their main purposes are:

1. To increase dimensional stability (that is, to reduce shrinkage),
2. To increase material The stiffness,
3. Increase the heat resistance of the material,
4. Reduce the material cost and other aspects.

But it also has its shortcomings:

1. The density increases,
2. The impact toughness decreases due to poor use,
3. The luster of the material is reduced. decline.

Talcum powder has the same particle size as calcium carbonate, generally 300 mesh, 600 mesh, 800 mesh, 1250 mesh and 2500 mesh. Of course, there are finer ones, which are generally used in plastics. You can choose between 800 mesh and 1250 mesh, which can achieve the highest performance/price ratio.

The price of talc powder fluctuates. Generally speaking, it is not a big problem to set the price according to the mesh size. For example, the general price of 800 mesh is between 700 and 850 yuan. The price is between 1,000 and 1,280 yuan. It is abnormal for the price to be too high or too low.

About the difference between talc powder and calcium carbonate:

1. The shape of talc powder is flake, so it has higher stiffness, dimensional stability and heat resistance temperature. The enhancement effect is good.
2. Calcium carbonate is generally granular, so its stiffness and other aspects are not as good as talc powder, but it is cheaper, has high whiteness, and has little impact on the impact toughness of plastics.
3. Talcum powder has a nucleating effect on polypropylene, while calcium carbonate has no obvious effect in this regard.
4. Calcium carbonate can generally be divided into light calcium carbonate and heavy calcium carbonate, while talc powder does not have this distinction. Talc powder is ground from natural minerals.