China Powder Network reported on July 9 that the main component of talc is magnesium silicate containing water in talc. Talc belongs to the monoclinic crystal system, and the crystals are pseudo-hexagonal or rhombus-shaped flakes, which are occasionally seen. Usually in dense block, leaf, radial and fibrous aggregates. Colorless, transparent or white, but due to a small amount of impurities, it appears light green, light yellow, light brown or even light red; the cleavage surface shows a pearly luster. Hardness 1, specific gravity 2.7~2.8. Talc is a white or off-white, fine, non-gritty powder that feels greasy to the touch. Odorless and tasteless, this product is insoluble in water, dilute mineral acid or dilute alkali hydroxide solution.

Special properties of talc powder:

Talc powder has always played an irreplaceable role in industrial production, mainly because talc powder has the following properties:

1. Adsorption – high oil absorption value, improves the printability of paper ink, reduces resin obstacles in the paper making process, and improves white water cleanliness. It is also a waste paper deinking aid with good performance, which is beneficial to improving the retention rate of organic additives in the wet end of the paper machine;

2. Lubricity – improving paper adhesion and production operability; Gives paper good feel, softness and finish; reduces the amount of coating lubricant;

3. Chemical stability – suitable for various papermaking sizing systems, with fillers such as calcium carbonate and kaolin In comparison, it can save the amount of chemical additives added and give the paper a good sizing effect. It has good compatibility with various pigments, latex and auxiliary additives in the coating system. Soft and low hardness: low abrasion; high crushing ratio, relatively easy to process powder, which can reduce the wear of processing equipment, papermaking and printing equipment, and improve the paper finishing effect;

4. Hydrophobicity – —Improve water resistance of paper and reduce hygroscopicity of finished paper. Flake structure: It gives the coated paper good smoothness, gloss, roughness, hiding ability and printability. It is an ideal mineral that can replace water-separated kaolin for papermaking coatings.

The particularity of talc powder cannot be ignored in future planning, and production companies must not blindly invest in production.

Under the situation of opening up to the outside world, China's talcum powder industry is facing not only great opportunities for market development, but also severe challenges from foreign advanced technologies. Some large-scale foreign talc powder manufacturers are optimistic about the Chinese market and have strong interest in establishing joint ventures with Chinese companies to build production equipment.

This shows the attractiveness of China's talcum powder market to foreign companies. It also shows that ultra-fine talc powder has broad development prospects in China. Due to the wide sources of raw materials for the production of talc powder products, simple production processes, and broad application fields, production companies are currently spread across the country. Therefore, the development of this industry must be regulated by the levers of the market economy, and administrative measures cannot be used to protect domestic companies.