Both
talc and calcium carbonate are used for filling purposes. The purpose is to:
1, increase dimensional stability (that is, shrinkage reduction);
2, increase the rigidity of the material;
3, increase the heat resistance of the material;
4, reduce material costs and other aspects.
But there are also flaws:
1, the density increases;
2, the use is not good, the impact toughness is reduced;
3, the material gloss has decreased.
Talc and calcium carbonate have the same granularity, usually 300 mesh, 600 mesh, 800 mesh, 1250 mesh and 2500 mesh. Of course, there are finer, and generally used in plastic can choose 800 mesh and 1250 mesh. Two, this can make the performance / price ratio the highest.
About the difference between talc and calcium carbonate:
1. The shape of talc is flake-shaped, so it has higher rigidity, dimensional stability and heat-resistant temperature, and the reinforcing effect is good.
2, calcium carbonate is generally granular, so its rigidity and other aspects are not as good as talcum powder, but its price is lower, and the whiteness is high, and the impact on the impact toughness of plastic is small.
3, talc has a nucleating effect on polypropylene, and calcium carbonate has no obvious effect in this respect.
4, calcium carbonate can be generally divided into light calcium carbonate and heavy calcium carbonate, and talc powder does not have this distinction, talcum powder is ground from natural minerals.
Calcium carbonate / talc composite reinforced PP, its performance is as follows:
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Final Drive
Excavator Final Drive,Excavator Spare Parts,Excavator Final Drive Parts,Mini Final Drive,Travel Device
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