Nano-calcium carbonate refers to a calcium carbonate polymer having at least one dimension of calcium carbonate particle size controlled between 1 and 100 nm. Its particle size is in the transition region where the cluster molecule and the macroscopic object alternate, and a single nano-calcium carbonate primary particle ( The primary particles, also known as primary particles, cannot be observed with the naked eye or even with ordinary light microscopes. A high resolution electron microscope must be used to see the structure and shape. The nano-calcium carbonate has quantum size effect, small size effect, surface effect and macroscopic quantum tunneling effect, and has different or abnormal physical and chemical properties from ordinary light calcium carbonate in terms of magnetic properties, catalytic properties, light thermal resistance and melting point, etc. For example: special properties such as toughness, reinforcement, transparency, thixotropy, leveling, and sterilization and sterilization. With the deepening of research on the application of nano-calcium carbonate, people gradually opened the mystery of the veil, which greatly stimulated the research and development interests of scientists and technicians at home and abroad.
Nano-CaCO3 as a new high-grade inorganic functional material, compared with ordinary calcium carbonate products, it has the characteristics of fine particles, large specific surface area, high surface activation rate, high whiteness, etc., which can be enhanced in many applications. Toughening effect, thereby improving the product's usability and appearance. It can partially replace expensive raw materials such as silica, which will reduce the cost of the product and significantly increase its quality. Therefore, the emergence of nano-calcium carbonate, it emerged a wide range of applicability and strong market demand, has a wide range of applications in the coatings, plastics, rubber, adhesives, paper, ink, paint, cosmetics and pharmaceuticals and food and other fields. At present, a ton price above RMB 10,000 is a nano-industry with a 10,000-ton scale and the highest level of industrialization. Its toughening and reinforcing effects have greatly improved and enhanced the performance and quality of related industries. The performance of nano-effects and characteristics in the production process and application process has been a concern for the majority of nano-calcium carbonate production companies and users.
According to the status quo of the domestic plastics industry and the use of nano-calcium carbonate in recent years, some industry experts recently suggested that the plastics industry should focus on developing the following areas in the use of nano-calcium carbonate: degradable agricultural film, nano-modified automotive plastic parts and special resins.
Degradation of agricultural film The annual amount of agricultural mulch used in China is more than 450,000 tons, which has caused unavoidable land pollution problems. Therefore, there is a high demand for the promotion and use of biodegradable agricultural film, but at present the price of biodegradable agricultural film is too high, and it is still difficult to promote it. The use of nano-calcium carbonate to modify the agricultural film can solve the contradiction between cost, performance and price. Although inorganic nano calcium carbonate fillers, like normal calcium powder fillers, cannot play a direct role in the degradation of agricultural films, due to the unique properties of nano calcium carbonate, they can be filled in a large proportion evenly in the agricultural film, so that the product is formed. And when secondary stretching is carried out, numerous tiny gaps are formed on the surface and inside, which helps and accelerates the degradation of the agricultural film by photo/biological additives. The resulting agricultural film can guarantee both quality and performance without increasing production costs. Can achieve rapid degradation.
Nano-modified automotive plastic parts Lightweight is the key to saving energy and reducing consumption. The data shows that every 10% reduction in vehicle quality, fuel consumption can be reduced by 6% to 8%. In order to reduce the weight of the car, the use of high-performance plastic parts to replace bulky metal parts has become the mainstream of development. Ordinary plastic products have low modulus and heat resistance, and have poor impact strength, which makes them difficult to directly use in automotive parts. However, if a certain proportion of nano-calcium carbonate and other additives are added to the plastic resin and the resin is modified, the heat resistance, aging resistance and impact strength of the obtained product can be significantly enhanced. This will be the fastest growing demand for nano-calcium carbonate in the country and the most promising area for development. For example, the PP modified with nano-calcium carbonate used in cars can have its heat resistance increased from 80°C to 150°C, and can guarantee that it will not age or crack at high temperatures for 750-1000 hours.
Nano-modified special resin, at present, China's special plastic resin varieties, low grade, it is difficult to meet market demand. However, if special additives and nano-calcium carbonate emulsions are added during the synthesis of plastic resins, high-performance special-purpose plastic resins that are in short supply in the domestic market can be obtained. Such as Taiyuan Chemical Co., Ltd. and Hangzhou Warner cooperation, the development of nano-calcium carbonate microemulsion, has been successfully used in Taihua shares chloralkali branch PVC equipment, PVC resin produced by the pursuit of plastic processing companies at home and abroad, the product has been in short supply.