An Introduction to Ultrafine Calcium Carbonate Powder
Ultrafine calcium carbonate powder is a classification of calcium carbonate, with the molecular formula CaCO3.
Ultrafine calcium carbonate powder refers to calcium carbonate with an average particle size of 0.02 μm < d ≤ 0.1 μm. This ultrafine calcium carbonate is widely used in the plastics industry for wires, leather fabrics, molded products, rigid pipes, profile extrusion, floor tiles, thin films, and EVA foam; in the coatings industry for powder coatings, synthetic resins, glazes, oil-based paints, emulsion paints, and primers; in the rubber industry for footwear, electric wires and cables, tires, sponge rubber, rubber pastes, rubber linings, belts and hoses; in papermaking; as well as in coating and filling applications in various industries, and in fuel colorants, toothpaste, cosmetics, food additives, acid neutralizers, and other fields.
What are the properties of ultrafine calcium carbonate powder? Let’s take a brief look at them together below.
Heavy calcium carbonate is a high-brightness sand and powder with particle sizes ranging from 6 to 2,500 mesh. It is produced from marble and limestone ores and is characterized by high purity, exceptional whiteness, uniform particle size, as well as being odorless, tasteless, non-corrosive, non-radioactive, and environmentally friendly. Owing to its excellent dispersibility, heavy calcium carbonate serves as an outstanding raw material and filler in industries such as rubber and plastics, papermaking, food, pharmaceuticals, polymer composites, and daily-use chemicals.
1. Applications of heavy calcium carbonate in rubber and construction materials. Heavy calcium carbonate serves as a bulk filler in rubber products, reducing the use of expensive natural rubber, lowering production costs, and enhancing processing performance. Compared with other additives, it significantly improves the elongation at break, tear resistance, compressive deformation, and flexural resistance of vulcanized rubber. When ultrafine calcium carbonate is incorporated into construction materials, it enhances heat resistance, chemical corrosion resistance, cold resistance, sound insulation, impact resistance, and processability, thereby substantially improving product performance.
2. In applications within the plastics and paper-making industries, heavy calcium carbonate significantly enhances the adhesion of plastic products, improves heat resistance, optimizes processing performance, boosts scratch resistance, increases smoothness, and enhances notch impact strength. When used in papermaking, heavy calcium carbonate reduces wear on paper machines, increases paper brightness, strength, opacity, and surface smoothness, imparts excellent foldability and softness to the paper, and enhances its absorbency for both ink and water.
3. Applications in the coatings, health-functional food, and beverage industries: Ultrafine calcium, when added to coatings, can serve as a whitening filler, enhancing the gloss of Chinese coatings and paints while also providing reinforcing effects. This not only helps reduce production and management costs for enterprises but also ensures that product quality and performance meet the desired standards. As long as the levels of harmful elements such as lead and arsenic in ultrafine calcium are strictly controlled, it can be used as a calcium-source additive in the research and development of health-functional foods and beverages. With its advantages of high quality, low cost, and easy absorption, ultrafine calcium is currently being studied and applied in areas such as infant formula.
4. It is a material that must be added in the production of ceiling tiles and plastic masterbatches.
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