What is the role of heavy calcium carbonate in plastic processing?

First, the product overview:
With the continuous improvement of people's living standards and the growing development of the plastics industry, people's dependence on plastic products and performance requirements are also getting higher and higher. Increasing market demand has led the plastics processing industry to be more active in finding and using a variety of effective methods and filler materials to reduce production costs, improve product processes and increase production efficiency. Heavy calcium carbonate is one of the most widely used filling materials in the industry.
Heavy calcium carbonate, referred to as heavy calcium, is a white powder processed from high-quality calcite and marble. Its composition is mainly composed of more than 98% CaCO3, and a small amount of metal compounds such as MgO, Fe2O3, Al2O3, SiO2, insoluble in water and ethanol, with high whiteness, good purity, soft hue, heat resistance, corrosion resistance, chemical composition. Stable, relatively low price, etc., is the most inorganic filler used in industrial production, and is widely used in plastics, paper, paint, paint, artificial floor tiles, rubber, construction supplies and other fields.
Among the heavy calcium carbonate series products, natural calcite is the best raw material, and its calcium content is extremely high (more than 99%). The content of harmful metal compounds is very small, so it is used in food and medicine. , cosmetics, toothpaste, feed and other industries.
Second, product application:
Filling a heavy calcium carbonate product in a plastic product can play a skeleton role, has a great effect on the dimensional stability of the plastic product, can improve the hardness and heat resistance of the product, and can improve the surface gloss and surface of the product. Flatness. Since the whiteness of calcium carbonate is as high as 90% or more, it can also replace the expensive white pigment to play a certain whitening effect.
The test proves that the filler masterbatch made of ultra-fine heavy calcium carbonate is applied to the plastic woven bag in an amount of up to 10%. The mechanical properties of the woven bag exceed 5% of the woven bag prepared by the common filler masterbatch, and the performance price thereof Better than woven bags made from ordinary filled masterbatch. Therefore, the application of the calcium carbonate filler not only increases the added value of the non-metallic minerals, but also reduces the cost of the plastic products, greatly improving the economic efficiency for the manufacturer.
In addition, after the calcium carbonate product is properly processed and processed into a pellet shape for use in a plastic product, in addition to cost reduction, it has the following uses:
1. Adding 30% of specially treated calcium carbonate filler to plastic products can make the notched impact strength of the product reach 10%~120%, and the thermoplastic, elastomer and toughness can reach the same level of modified products.
2. Adding filler materials such as calcium carbonate and talc to the polyethylene (PE) agricultural film can make the agricultural film have a good barrier effect on infrared radiation and significantly improve the service life of the agricultural film.
3. The automobile parts made of super-fine heavy calcium carbonate filled with modified plastic products have the performance requirements of the German Volkswagen VW44045.
4. Filled plastic and rubber blending materials have high toughness, high rigidity and easy processing. When manufacturing motorcycle parts, they are similar in processing and performance to ABS.
5. The laminate filled with calcium carbonate has good impact resistance, heat resistance, abrasion resistance and the like, and can be used for secondary processing, for manufacturing plating tank, electroplating rotary drum press plate frame and the like.
6, the production of polyvinyl chloride (PVC) artificial leather, flooring, floor tiles and other large quantities of calcium carbonate fillers, can reduce the loss of plasticizers.
Third, the product market and distribution:
With the continuous advancement of technology, the development of new industrial products, especially calcium carbonate products, has been widely used as a high-quality filling material in various fields. The demand for calcium carbonate products at home and abroad is increasing day by day. According to relevant data, only one plastic processing industry in China has a demand of 600,000 tons in 1996 and 800,000 tons in 2000, and nearly 1.5 million tons by the end of 2005. In addition, coupled with the characteristics of minerals as non-renewable resources, there are few areas in China where large quantities of high-quality natural calcite ore (heavy calcium carbonate) can be produced. At present, China's most reserves, the best quality calcite mine is mainly distributed in Hechi, Baise and other regions of Guangxi Zhuang Autonomous Region.
Due to its location in the mountains, information is occluded, and the level of science and technology is lagging behind, especially due to the late start of infrastructure construction, which has led to the discovery of a large number of high-quality mineral resources. For this reason, the natural calcite deposits in this area are extremely high in reserves, with high quality, 99.8% calcium content, 96-99 whiteness, extremely low impurity content, very little sulfur, and no heavy metals and other humans. Toxic and harmful substances, can be widely used in food, cosmetics, medicine, toothpaste, feed and other production areas. In addition, its calcite mine also has high transparency, and the indicators such as hiding rate, oil absorption, moisture, dispersibility and other physical and chemical properties are at the first-class level. The plastic products produced by the products are in appearance and hand feeling. It will be especially good.
Fourth, the conclusion:
Although calcium carbonate products have shown a tendency to replace light calcium carbonate with heavy calcium carbonate in plastic products. However, the ratio of heavy calcium carbonate to light calcium carbonate used in the production of plastics in China is only 1:1, far from the international (14-18):1 ratio. Therefore, as long as we rely on science, constantly explore, and strive to improve our production and processing technology, level, we will be able to give greater play to the advantages of heavy calcium carbonate products, and create greater value!

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