Heavy calcium carbonate, commonly referred to as heavy calcium, is a white powder made from limestone processed through a lime stone mill. Its primary component is CaCO3. Heavy calcium boasts high brightness, good purity, soft color tone, and stable chemical composition. It is commonly used as a filler in various industries such as artificial tiles, rubber, plastics, papermaking, coatings, paints, inks, cables, construction materials, food, textiles, feed, toothpaste, etc., to increase product volume and reduce production costs. In rubber, it can increase the volume, improve processability, act as a semi-reinforcement or reinforcement, and adjust the hardness of rubber.

Applications of Heavy Calcium Powder:

Due to its lower specific surface area and oil absorption value, it is easier to mix with resins.

② Less volume and higher density of filling material under the same filling amount.

③Different raw materials have varying types and concentrations of impurities, resulting in inconsistent product colors. However, light calcium carbonate, due to its ability to adjust particle crystal shape according to different application requirements, offers good versatility; it can increase the volume of the product with the same amount of filler due to its large settling volume or low bulk density; the color difference of the product is even due to fewer impurities; the mechanical properties of the filling material are better with a smaller particle size under the same amount of filler; however, due to its large specific surface area and oil absorption value, it has greater resistance when mixed with resins (is harder to mix).