Calcium carbonate is an odorless and tasteless white powder, and it is a widely used inorganic filler. As a kind of white pigment, calcium carbonate has low price, abundant resources and high grade. It is widely used in coatings, plastics, rubber and other fields. Calcium carbonate is used in powder coatings and has the properties of high powder rate, large spray area, no sand, and no heavy metals.

1. Classification of calcium carbonate

According to the different production methods of calcium carbonate, calcium carbonate can be divided into heavy calcium carbonate, light calcium carbonate, colloidal calcium carbonate and crystalline calcium carbonate.

According to the different arrangement of the microstructure of calcium carbonate, that is, the arrangement of atoms and ions and whether there are regularities, the development of calcium carbonate can be divided into two crystalline calcium carbonate and amorphous calcium carbonate.

2. The nature of calcium carbonate

Calcium carbonate is non-irritating, tasteless, white, dry and without crystal water, soft powder, hardness No. 3 on the Mohs. Precipitated calcium carbonate is a chemical production of calcium carbonate. The average particle size is between 0-6um and the whiteness is above 95%. This is usually used for calcium carbonate powder coatings.

Heavy calcium carbonate is made of natural calcite, limestone, etc. as raw materials through mechanical grinding. Due to the impurity of the product, its application in powder coatings is limited.

3. The role of calcium carbonate in powder coatings

A. It acts as a skeleton in powder coatings. Their filling can increase the thickness of the coating film and improve the wear resistance and durability of the coating.

B. It can reduce the cost of painting. Generally, the price of calcium carbonate is lower than other inorganic fillers, and the amount of calcium carbonate added in the coating is also relatively large, so adding calcium carbonate can reduce the cost of powder coatings.

C. It can increase the powder speed and spraying area of ​​powder coatings.

Shandong Shenxing Calcium Industry Technology Co., Ltd. is an enterprise that mainly produces heavy calcium carbonate, calcium carbonate powder, calcium carbonate and other products. If you have any needs in this regard, please contact us.