Uncoated calcium carbonate
Uncoated calcium carbonate is an extremely versatile mineral used in numerous industrial and commercial applications. Here are some of the key uses
- Paper Manufacturing: It serves as both a filler and coating agent, enhancing the brightness, opacity, and printability of paper.
- Paints and Coatings: As a pigment extender, it improves the flow properties, gloss, and durability of paints and coatings.
- Plastics: It acts as a filler, enhancing the mechanical properties of plastic products, such as stiffness, impact resistance, and dimensional stability.
- Rubber Products: Used as a reinforcing agent, it increases the strength and durability of rubber items like tires, belts, and hoses.
- Construction Materials: In concrete and mortar, it functions as a filler to enhance strength, durability, and workability.
- Agricultural Use: As a soil conditioner, it neutralizes acidic soils and provides essential nutrients to plants.
- Food and Pharmaceuticals: It is utilized as a dietary supplement, antacid, and bulking agent in various food and pharmaceutical products.
Coated calcium carbonate is a type of calcium carbonate that has been treated with a coating agent, typically stearic acid, to enhance its properties. This process involves applying a thin layer of the coating agent to the surface of calcium carbonate particles.
Why Coat Calcium Carbonate?
1.Improved Dispersion: The coating helps the calcium carbonate particles disperse more uniformly in various matrices, such as plastics, paints, and coatings, leading to better consistency and performance of the final product.
2.Hydrophobic Properties: The stearic acid coating makes the calcium carbonate particles hydrophobic (water-repellent). This reduces moisture absorption and improves the material’s durability and resistance to environmental factors.
3.Enhanced Performance: Coated calcium carbonate can improve the mechanical properties of materials, such as their strength, flexibility, and resistance to abrasion.
Applications:
- Plastics: Used as a filler to enhance the mechanical properties of plastic products.
- Paints and Coatings: Acts as a pigment extender and improves the rheology, gloss, and durability of paints and coatings.
- Adhesives and Sealants: Enhances the performance and longevity of these products.
- Rubber: Used as a reinforcing agent to improve the strength and durability of rubber products.