Applications of Ground Calcium Carbonate
Calcium carbonate is a versatile and important building material and industrial raw material, widely used in construction, papermaking, metallurgy, glass, rubber, pharmaceutical, food and other fields. It can serve as both a food additive and a calcium supplement with an absorption rate of 39%, making it the calcium supplement category with the most dosage forms and the widest application range currently.
Calcium carbonate of different mesh sizes has distinct specific uses: those with a mesh size of less than 200 can be used as feed additives; while those ranging from 250 to 3000 mesh are suitable for the production of plastics, coatings, pipes, toothpaste, wires and cables, engineering plastics, inks and other related products according to differences in whiteness and particle size, which can effectively improve the hardness and whiteness of materials and reduce production costs at the same time.
Rubber-Specific 400-Mesh Calcium Carbonate
As a leading filler in the rubber industry, 400-mesh rubber-grade calcium carbonate features core specifications of 93% whiteness and 96% purity. Its high-volume addition enhances the volume of rubber products, making the vulcanized finished products outperform pure rubber vulcanizates in tensile strength, tear strength and wear resistance. It also replaces part of the high-priced natural rubber, helping enterprises control production costs.
Plastic-Specific 400-Mesh Calcium Carbonate
As a key filler for plastic products, 400-mesh plastic-grade calcium carbonate boasts core specifications of 95% whiteness and 99% purity, with requirements of unaltered whiteness after high-temperature heating and a macrocrystalline calcite ore structure. It acts as a skeletal component in plastic products, significantly enhancing dimensional stability while improving product hardness, surface gloss and flatness.
Paint-Specific 800/1000-Mesh Calcium Carbonate
800-mesh or 1000-mesh paint-grade calcium carbonate features core standards of 95% whiteness and 96% purity, and is a filler with significant usage in the paint industry—its addition ratio alone in paste paint exceeds 30%. It can improve the hiding power and fullness of paint films, optimize coating leveling property, while enhancing coating hardness and wear resistance, helping reduce the raw material cost of paint production.
Waterborne Coating-Specific 800/1000-Mesh Calcium Carbonate
800-mesh or 1000-mesh calcium carbonate for waterborne coatings boasts core specifications of 95% whiteness and 96% purity, and is a widely applied key filler in the waterborne coating industry. It endows coatings with excellent properties like non-settling and easy dispersion, while enhancing film gloss, with an addition ratio ranging from 20% to 60% in waterborne coatings.
Papermaking-Specific 325-Mesh Calcium Carbonate
325-mesh papermaking-grade calcium carbonate features core specifications of 95% whiteness and 98% purity, and is an indispensable key material in the papermaking industry. It can effectively enhance the mechanical strength and whiteness of paper, while helping papermaking enterprises control production costs and optimize production efficiency with its cost-effective characteristics.
Construction-Specific 325-Mesh Calcium Carbonate
325-mesh construction-grade calcium carbonate features core specifications of 95% whiteness and 98% purity, and is a key additive in concrete within the construction industry. It can not only significantly reduce the raw material cost of concrete production, but also effectively enhance the product’s toughness and structural strength, helping optimize the comprehensive performance of building materials.
Fire-Retardant Ceiling-Specific 600-Mesh Calcium Carbonate
600-mesh calcium carbonate for fire-retardant ceilings features core standards of 95% high whiteness and 98.5% high purity, and is a key functional material in the production of fire-retardant ceilings. It can not only significantly enhance the product’s whiteness and surface brightness, presenting a clean and transparent visual effect for the panels, but also improve the material’s fire resistance and flame-retardant performance, helping the product meet strict safety standards and build a solid fire safety barrier for architectural spaces.
Floor Tile-Specific 400-Mesh Calcium Carbonate
400-mesh calcium carbonate for floor tiles features core specifications of 95% high whiteness and 98.5% high purity, along with the excellent trait of being pure and impurity-free, serving as a key functional filler in floor tile production. It can significantly enhance the whiteness of floor tiles, ensuring uniform and translucent surface color; meanwhile, it boosts the product’s tensile strength and toughness, optimizes the tile’s impact resistance and fracture resistance, and extends its service life. Furthermore, it helps enterprises achieve dual improvements in cost-effectiveness and product quality by reducing raw material costs through scientific proportioning.
Stearic Acid-Modified Calcium Carbonate for Inks
Stearic acid-modified calcium carbonate, specifically designed for the ink industry, serves as a core functional filler to enhance the comprehensive performance of inks. It imparts excellent viscosity and stable printing effects to inks. With its fine and uniform particle size, it can efficiently blend with other raw materials, resulting in printed matter featuring a smooth texture, intact dot reproduction, strong hiding power, and high gloss. As a ground calcium carbonate (GCC) filler, it further strengthens the gloss and brightness of inks, helping printed products achieve high-quality presentation.
Calcium Carbonate for Breathable Films
Calcium carbonate serves as a core functional component in the production and processing of breathable films, acting as a key breathable material integrated into the film formulation. Also known as “waterproof and breathable microporous films,” breathable films use PE as the carrier. After adding calcium carbonate in a precise ratio, followed by molding and stretching processes, the films form a special microporous structure with high-density distribution and numerous interconnected pores. This ultimately endows the product with the core characteristic of being breathable yet waterproof, enabling breathable films to deliver excellent performance in various application scenarios.
Calcium Carbonate for Adhesives
Calcium carbonate is a core functional filler for adhesives suitable for multiple fields, widely used in woodworking adhesives, construction adhesives, sealants, heat-shrinkable adhesives, pressure-sensitive adhesives, glass adhesives and other products. It has excellent affinity with rubber compounds, can accelerate the crosslinking reaction of adhesives, significantly improve the thixotropy and dimensional stability of the system, and simultaneously enhance the mechanical properties of adhesives. With a sufficient addition amount, it can achieve dual effects of filling and reinforcement, and also make the surface of the rubber compound present a bright and delicate texture, comprehensively optimizing the comprehensive use effect of adhesives.