The application and difference of talcum powder and calcium carbonate

1 Talcum powder and calcium carbonate are used for filling Their main purposes are: 1 Increase dimensional stability (i.e reduce shrinkage), 2 Increase the rigidity of the material, 3 Increase the heat resistance of the material, 4 Reduce the cost of the material, etc., but they also have their defects: 1 Increase the density, 2 Poor use, decrease the impact toughness, 3 Decrease the luster of the material 2 Talcum powder and calcium carbonate have the same particle size distinction, generally 300 mesh, 600 mesh, 800 mesh, 1250 mesh and 2500 mesh, of course, there are finer ones, and generally used in plastics, 800 mesh and 1250 mesh can be selected, so that the performance / price ratio is the highest 3 The price of talcum powder fluctuates Generally speaking, there is no big problem in determining the price according to the number of items For example, the price of 800 items is generally between 700 and 850 yuan, and that of 1250 items is between 1000 and 1280 yuan It is not normal for prices to be too high or too low The difference between talcum powder and calcium carbonate: 1 Talcum powder is flaky in shape, so it has higher rigidity, dimensional stability, heat resistance temperature, and good reinforcement effect 2 Calcium carbonate is generally granular, so its stiffness and other aspects are not as good as talcum powder, but its price is lower, and its whiteness is high, and its impact toughness on plastic is small 3 Talc has nucleation effect on polypropylene, but calcium carbonate has no obvious effect on this 4 Calcium carbonate can be generally divided into light calcium carbonate and heavy calcium carbonate, but talcum powder does not have this distinction Talcum powder is ground from natural minerals