Difference between talc and calcium carbonate filler

In the production process of plastics, rubber, adhesives and other products, fillers are indispensable raw materials. Adding fillers can increase the aesthetics and durability of the product. Generally, fillers are mainly talc or calcium carbonate, which can increase material thickness, reduce cost, and increase stability. But what are the differences between the commonly used talc filler and calcium carbonate filler? Today, Xiaobian takes everyone to learn to fill those things - the difference between talcum powder and calcium carbonate. I hope that through this tweet, the readers will have a clearer understanding of calcium carbonate fillers and talc fillers, and the selection of fillers is more targeted.

The first is the comparison of prices. The price of calcium carbonate is mainly affected by its particle size. The calcium carbonate filler is generally 300 mesh, 600 mesh, 800 mesh, 1250 mesh and 2500 mesh. The price of calcium carbonate with different particle sizes is also different. Generally, the smaller the particle size, the higher the price. In the plastic, 800 mesh and 1250 mesh are generally used, which can make the most cost-effective. The price of talcum powder is relatively stable. Generally speaking, the price will not be too big depending on the mesh. For example, the general price of 800 mesh is between 700 and 850 yuan, and the price of 1250 is 1000 to 1280 yuan. between.

Second, it is compared from the effect of the filler. The shape of talc powder is flake-shaped, so it has higher rigidity, dimensional stability and heat-resistant temperature, and the reinforcing effect is good; calcium carbonate is generally granular, so its rigidity and other aspects are not as good as talcum powder. Talc can also be used as a nucleating agent to induce nucleation. In plastic production, talc has a nucleating effect on polypropylene, and calcium carbonate has no obvious effect in this respect.

Finally, compare the affinity of water and oil. The surface of talc has a hydrophilic group and has obvious hydrophilicity; calcium carbonate is slightly weaker in hydrophilicity. In general paint production, the effect of using talcum powder is better than that of calcium carbonate. From the cost point of view, calcium carbonate production costs are lower, generally used in some papermaking industries; talc powder production costs are higher, talc powder filled polypropylene is mainly used in the automotive and aircraft industries, because talcum powder is given to this material High stiffness and creep resistance at high temperatures. Other advantages of talc imparting materials, as well as excellent surface quality, low mold shrinkage, and ease of processing due to the action of talc as a flow promoter.

Through the above comparative analysis, we found that talc powder filler has a unique advantage, talcum powder in the field of filler industry is promising!

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