Textured sand Because of its advantages of good quality and low price, it has been widely used in plastic, building paint, paper industry and other industrial production. Using calcium bicarbonate as filler can not only increase the amount and control the cost, but also improve the electronic optics, thermodynamics, structural mechanics and other properties of plastic products, in which the structural mechanical properties are the key and basic properties.
Calcium carbonate filled with plastics has a history of more than ten years. With the development of technology in recent years, it can not only control the cost, but also not significantly reduce the performance of products, and even in some levels, such as mechanical equipment, heat and other levels can be greatly improved.
The calcium carbonate used to fill the plastic includes textured sand and light calcium carbonate (commonly called light calcium carbonate). High quality calcium carbonate can improve the volume of plastic products, control costs, improve hardness and strength, reduce the shrinkage rate of plastic products, and improve the reliability of specifications; Improve the production and processing performance of plastics, improve its temperature resistance, improve the astigmatism, abrasion resistance and smoothness of plastics; At the same time, it has significant practical effects on the modification of notch impact and compressive strength and the viscous flow of rubber mixture during operation.
The manufacturer of textured sand will give you a detailed introduction Heavy calcium carbonate The key raw materials of calcium carbonate are dolomite, white marble or limestone. The heavy calcium carbonate produced is white powder, and the whiteness is generally above 94.
The whiteness index value of calcium carbonate only reflects its classic refraction level of white light, but cannot reflect the true color of calcium carbonate. Therefore, even if the whiteness of many calcium carbonate powder forms reaches 95 or more, after filling into the plastic, it is usually found that the background color of plastic masterbatch, plastic pipe fittings or furniture boards made by extrusion production is yellow or black. Many customers think that it is the reason why the heat resistance of textured sand powder is not good, and many customers think that it is the reason why the heat resistance of heavy calcium carbonate powder is poor, The ambient temperature for dissolving heavy calcium carbonate is not easy to exceed 800 ℃.
The main component of white jade or limestone is calcium carbonate, but both of them have a percentage of calcium sulfate. The color of magnesium carbonate itself is dark dark gray. The higher the proportion of calcium carbonate and magnesium carbonate, the darker the masterbatch after production and processing, and it will also turn black when filled with other plastics. Some calcium bicarbonate contains compounds that will show bright red or yellow tones when used to fill plastics.
