Nano calcium carbonate is also called ultrafine calcium carbonate. The standard name is superfine calcium carbonate. Its particle size is between 0.01~0.1μm.

The most mature application of nano-calcium carbonate is the plastic industry, which is mainly used in high-end plastic products. It can improve the rheology of the plastic masterbatch and improve its moldability. Used as a plastic filler, it has the function of toughening and strengthening, the bending strength and bending elastic modulus of the plastic, thermal deformation temperature and dimensional stability, and it also gives the plastic heat hysteresis.

Limestone is a common non-metallic mineral and a valuable resource with a wide range of uses. my country is one of the countries with rich limestone resources in the world. Except for Shanghai, Hong Kong and Macau, it is distributed in all provinces, municipalities and autonomous regions. According to the statistics of the Geological Center of the former National Building Materials Bureau, the distribution area of ​​limestone in the country reaches 438,000 km2 (excluding Tibet and Taiwan), which accounts for about 1/20 of the country's land area. Among them, limestone resources that can be used as cement raw materials account for about 50% of the total resources. 1/4～1/3. In order to meet the needs of environmental protection, ecological balance, prevention of soil erosion, scenic tourism, etc., especially with the continuous improvement and implementation of my country's small town construction plan, the amount of cement limestone available for mining will also be reduced.

Judging from the current domestic and international demand for limestone, the world's annual demand is about 1.2 billion tons, but 80% is for general use. High-quality lime has a large market gap due to low resources and low output.

At present, there are nearly a thousand heavy calcium carbonate processing enterprises in China. From the perspective of industrial scale, their annual production capacity exceeds 100,000 tons; from the perspective of product structure, the product structure is relatively complete, and at the same time, it can produce a certain degree of functional and refined product. The number of enterprises of this type only accounts for about 5% of the total number of enterprises, and its industrial scale accounts for 30% of the domestic nano-calcium carbonate enterprises. Furthermore, domestic enterprises lack the vision of industrial alliances for cooperative development, and the scale effect of enterprises cannot be reflected.

Analyzing the future development prospects of China's nano-calcium carbonate industry, there are abundant limestone resources stored in the earth's surface on which mankind depends for survival, and more than 90% of limestone is calcium carbonate. As an additive for composite materials, calcium carbonate starts with calcium carbonate and ends with calcium carbonate. It has no chemical structure changes and theoretically will not cause artificial changes to the ecology. It is in line with the new trend of world industrial development that attaches importance to environmental protection. Therefore, the calcium carbonate industry is a "sunrise industry" for sustainable development in the 21st century.

Nano calcium carbonate, as a high-end product in the calcium carbonate series, will gradually replace ordinary calcium carbonate and has a good market prospect. In the next few years, the demand for nanometer calcium carbonate in my country will increase by about 20% annually.

With the expansion of my country's nanometer calcium carbonate products, the improvement of quality, and the reduction of costs, the market competitiveness of domestic nanometer calcium carbonate has been improved. Now it can not only replace imports, but also begin to export to the international market. It is believed that in the near future, my country will become a major exporter of nano-calcium carbonate.

Because the industrialization speed of China's nano-calcium carbonate products cannot keep up, it limits the scope of its use, and at the same time it shows that imports are on the rise. As China's requirements for product quality in rubber, plastics, papermaking, coatings, inks and other industries continue to increase, the market for ordinary calcium carbonate will gradually shrink, and the consumer market for ultrafine calcium carbonate will grow rapidly.