Talc powder is a white or off-white, fine, non-gritty powder that feels greasy to the touch and is odorless and tasteless. Do you know the top ten application areas of industrial talc?
Main Ingredients
The main component of talc is hydrated magnesium silicate, and it belongs to the monoclinic crystal system. Its crystals are pseudo-hexagonal or rhombohedral, with occasional occurrence in these forms. Talc typically forms dense, blocky, flaky, radiated, or fibrous aggregates. It is colorless and transparent or white, but due to trace impurities, it may appear in light green, yellow, light brown, or even light red. It has a pearly luster on its surface, a hardness of 1, and a specific gravity ranging from 2.7 to 2.8.
Basic Features
Talc has excellent physical and chemical properties such as lubricity, anti-stickiness, flow-aiding, fire resistance, acid resistance, insulation, high melting point, chemical inactivity, good hiding power, softness, good gloss, and strong adsorption. Since the crystal structure of talc is layered, it has a tendency to split into scales and has special lubricity. High Fe2O3 content reduces its insulation.
Talc is soft, easily cracked into thin slices, and extremely unstable.
The surrounding rocks are silicified and talcified magnesite, magnesite, lean ore or dolomite marble. Except for a few moderately stable ones, they are generally unstable.
Joints are well developed, and the physical and mechanical properties of ore and surrounding rock have a great influence on the mining process.
Applications in the chemical industry
Industries such as rubber, plastic, paint, and other chemicals use talc as a reinforcing and modifying filler.
It increases the stability of product shape. Moreover, it enhances tension strength, shear strength, bending strength, and pressure strength.
Additionally, it reduces deformation, elongation, and the thermal expansion coefficient.
Talc also provides high whiteness, uniform particle size, and strong dispersion.
Application
Cosmetic
Talc powder is a high-quality filler in the cosmetics industry. Due to its high silicon content, it has the ability to block infrared rays, enhancing the sunscreen and anti-infrared performance of cosmetics. Talc powder is commonly used in the formulation of various skin care powders, beauty powders, body powders, and other products.
Pharmaceutical-food
pharmaceutical tablets, pharmaceutical powder sugar coating, prickly heat powder . As well as traditional Chinese medicine prescriptions, food additives, isolation agents, etc.
Coating
Coatings mainly use talc powder in primers and intermediate coatings. Flash-drying primers and coatings for vehicles often prioritize talc powder. Additionally steel structure primers may use talc powder entirely or partially to improve settling, mechanical properties, and re-coating. Polyurethane waterproof coatings often add talc powder to reduce shrinkage, enhance wear resistance, and improve adhesion. Moreover it also lowers costs, enhances stability, heat resistance, and extends storage life.
Papermaking
The addition of talcum powder in the papermaking industry helps to increase the retention rate of fillers and improve the transparency, smoothness and printability of paper, and make the paper have higher ink absorption. Talc powder has stable chemical properties and is not only suitable for papermaking under acidic conditions, but also can be used in conjunction with calcium carbonate for papermaking under neutral conditions. Talc powder has a good combination with sizing agents, so it can effectively improve the retention of sizing agents, reduce the absorbency of paper sheets, and prevent printing ink from penetrating paper sheets.
Plastic
Talc powder is an effective reinforcing material in plastics. It enhances plastic rigidity, creep resistance, and solid gloss at both room and high temperatures. Adding talc powder alters various plastic properties, such as surface hardness, tensile strength, and flexural modulus. Moreover it also improves molding shrinkage, impact strength, heat distortion temperature, and product dimensional stability.
Rubber
Adding talc powder to polyethylene and polypropylene plastics effectively improves surface hardness and scratch resistance.
Additionally, since talc powder costs only 10% to 20% of the plastic price, so applying talcum powder to the plastic industry can also reduce costs.
Cable
Replacing some carbon black with talc powder in the automotive industry enhances rubber’s heat resistance. In the industrial rubber products or hose industry, it will not damage the performance of the rubber (such as air conditioning refrigerant). For products such as door and window sealing strips, talcum powder can reduce the impact and damage of climatic conditions on rubber performance.
Ceramic
Talc powder plays an important role in the ceramic industry. The different colors exhibited by ceramics are due to the addition of talc powder. By adjusting the proportion and composition, ceramics can show a variety of colors. Additionally, talc powder helps ensure uniform density, smooth surfaces, and a good gloss after firing.
Waterproof material
used for waterproof membrane, waterproof coating, waterproof ointment, etc.
Fine talcum powder
used in high-grade paints and coatings, plastics, cables and rubbers, cosmetics, coated paper coatings, textile lubricants, etc.
Conclusion
The rapid advancements in science and technology have led to the continuous emergence of new materials, which in turn drive further technological development. “Powder makes the material, and without fineness, there is no structure.” Powder processing technology plays a crucial role in the research, development, and application of materials. EPIC Powder Technology focuses on ultrafine, ultrapure, functional, and environmentally safe solutions, providing comprehensive end-to-end services for the new materials industry.
By employing steam milling technology, EPIC achieves ultrafine processing and low-cost production. Taking talc as an example, the product can reach a particle size of 1 μm with a plate thickness of 300 nm. Minerals that can be processed include talc, graphite, mica, wollastonite, kaolin, and more.
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