What is the difference and application of Haicheng talc powder and light calcium powder and heavy calcium powder?

Both talc and calcium carbonate are used for filling. The main purposes are: 1. To increase dimensional stability (that is, to reduce shrinkage); 2. To increase the stiffness of the material; 3. To increase the heat resistance of the material; 4. There are several aspects such as material cost, but it also has its defects: 1, increased density, 2, poor use, reduced impact toughness, and 3, material gloss has decreased.

Talcum powder has the same particle size as calcium carbonate. Generally it is 300 mesh, 600 mesh, 800 mesh, 1250 mesh and 2500 mesh. Of course, there are finer ones. Generally, 800 mesh and 1250 mesh can be selected in plastic. Two, which can make the performance / price ratio high.

The price of talcum powder fluctuates. Generally speaking, there is no problem in determining the price according to the number of meshes. For example, the general price of 800 mesh is between 700 and 850 yuan, and the price of 1250 mesh is between 1,000 and 1280 yuan. between. It is not normal for the price to be too high or too low. However, talc is as non-renewable as coal and other resources, so prices generally do not fall but only increase.

About the difference between talcum powder and calcium carbonate:

1. The shape of talc is flaky, so it has higher rigidity, dimensional stability and heat-resistant temperature, and has a good reinforcing effect.

2. Calcium carbonate is generally granular, so its stiffness and other aspects are not as good as talc, but its price is cheaper, and its whiteness is high, and it has little impact on the impact toughness of plastics.

3. Talc powder has nucleation effect on polypropylene, but calcium carbonate has no obvious effect in this respect.

4, calcium carbonate can generally be divided into light calcium carbonate and heavy calcium carbonate, and talc powder does not have this distinction, talc powder is ground from natural minerals.