The Main Application Areas of Nano Calcium Carbonate

Nano calcium carbonate is a specialized inorganic filler characterized by its particle size ranging from 1 to 100 nm. Due to its unique nano properties, it finds extensive applications across diverse industries, including rubber, plastics, papermaking, inks, coatings, adhesives, pharmaceuticals, toothpaste, and food products. Different application scenarios have distinct requirements for core indicators such as particle size, crystal morphology, oil absorption value, and dispersibility. Precisely aligning these technical parameters is crucial for ensuring optimal performance in each application.

Plastic Field: Reinforcing and Toughening Core Fillers, balancing processing and performance

In plastic processing, standard calcium carbonate primarily functions as a filler. In contrast, modified nano calcium carbonate serves both as an active agent and a reinforcing agent. This capability enhances product volume, increases hardness and strength, improves processing fluidity, and optimizes critical properties such as heat resistance, bending strength, and elastic modulus. Its main applications are in PVC products, including wires, cables, and pipes, but it is also extensively utilized in other plastics like PS and PP. The addition of modified nano calcium carbonate can significantly enhance the strength, barrier properties, flame retardancy, and thermal stability of PVC plastics.

Rubber Field: Improving Mechanical Performance and Expanding High-end Application Scenarios

Nano calcium carbonate is primarily utilized in the rubber industry for products such as tires, wires and cables, rubber hoses, and tapes. It helps achieve essential objectives like increasing capacity, reducing costs, and enhancing processing performance. When compared to heavy calcium carbonate and standard light calcium carbonate, rubber products incorporating nano calcium carbonate exhibit significant advantages in terms of elongation, compression deformation, yield resistance, tear resistance, and more. Additionally, nano calcium carbonate that has been treated with specialized technology possesses sterilization and disinfection properties. It can release free electrons when exposed to ultraviolet light, reacting with oxygen or organic matter to eliminate bacteria. In tire manufacturing, nano calcium carbonate can partially substitute for carbon black and white carbon black, primarily being used in less stressed areas such as sidewalls and curtain rubber. When combined with active zinc oxide, it can further enhance the strength of tread rubber. It also plays a crucial role in reinforcing, whitening, and improving dispersibility in rubber hoses and tapes, and is widely employed in protective covers and adhesives for specialized wires and cables, including those used in mining, high voltage applications, and marine environments.

Adhesive Field: Optimizing Cross-linking and Thixotropy, Adapting to Diverse Systems

Nano calcium carbonate serves as a crucial filler in adhesives, offering benefits such as low cost and excellent compatibility with the base adhesive. It can accelerate the crosslinking process of the adhesive material, enhance thixotropy, and improve adhesion, tensile strength, and reinforcement effects. Currently, its application technology in polysiloxane sealants is well-established, while its use in emerging adhesives like polyurethane is still developing. Polyurethane adhesives are known for their superior adhesion, resistance to aging, and paintability, making them particularly advantageous in pollution-free and high-weather-resistance applications. Research into the adaptability of nano calcium carbonate remains a prominent topic within the industry.

Coatings Field: Reinforcement and Cost Reduction, Replacing High-end Pigments

Nano calcium carbonate is extensively utilized in coatings. Unlike heavy calcium carbonate and standard light calcium carbonate, it not only provides reinforcement but also enhances coverage, gloss, transparency, quick drying, and stability of the coatings. In sectors such as automotive and architectural coatings, it can partially or fully replace more expensive titanium dioxide, leading to significant reductions in production costs. Its use in PVC plastisol systems is particularly notable, as it comes with specific performance requirements.

Ink field: Improve Printing Performance and Ensure Quality Stability

Modified nano calcium carbonate exhibits exceptional compatibility with ink binders, offering benefits such as high gloss, strong stability, good adaptability, and no adverse effects on drying performance. It can significantly enhance ink quality while also reducing costs. Its performance has a direct impact on the quality of printed materials. The addition of modified nano calcium carbonate results in smoother and more stable ink, improved printability, strong coverage, and excellent ink absorption, facilitating quick drying of the ink.

Paper Industry: Multifunctional Fillers and Coatings, Compatible With Process Upgrades

The application of nano calcium carbonate in the papermaking industry is mainly divided into three major scenarios:

1. As a papermaking filler, it has uniform particle size and minimal wear on equipment, which can improve the fineness of paper. With high whiteness and high opacity, it optimizes the appearance of paper while saving pulp usage, reducing costs, and being environmentally friendly;
2. Used for cigarette paper, with an addition amount of 45% -50%, utilizing high refractive index to achieve light shielding, releasing CO ₂ during combustion to control the combustion rate and maintain ash content, and can also improve breathability and reduce tar content;
3. As a papermaking coating, transported in the form of slurry, it has the advantages of environmental protection, energy saving, and simplified process, which can improve the glossiness, whiteness, smoothness, surface strength, and ink absorption of coated paper.

Industry Development Outlook

With the rapid advancement of China's economy and industrial technology, the nano calcium carbonate industry is poised to close the gap with developed countries. The primary focus for industry development will be on enhancing application performance and creating functional, specialized nano inorganic materials. Additionally, the nano calcium carbonate industry encompasses various stages, including raw materials, production, and application. It is essential to foster technical exchanges and innovation among enterprises, achieve integration across the industrial chain, accurately align supply and demand in different sectors, expand market reach, and attain mutually beneficial outcomes.