Talc Properties And Uses


Talc is a common silicate mineral, belonging to a trioctahedral mineral, and its structural formula is (Mg6)[Si8]O20(OH)4. Talc is a hydrothermal alteration mineral. Magnesium-rich minerals often turn into talc through hydrothermal alteration, so talc often presents the illusion of olivine, enstatite, amphibole, tremolite and other minerals. Talc is one of the minerals. It is buried underground together with serpentine containing asbestos, so it often contains asbestos in its natural form. Talc is generally lumpy, leaf-like, fibrous or radial. It is very soft and has a slippery feel. Talc is soft, its Mohs hardness coefficient is 1~1.5, it has a slippery feel, {001} cleavage is very complete, it is easy to split into thin slices, the natural angle of repose is small (35°~40°), and it is extremely unstable. The rock is silicified and talcized magnesite, magnesite, lean ore or dolomitic marble, except for a few moderately stable, generally unstable, joints and fissures are developed, and the physical and mechanical properties of the ore and surrounding rock affect the mining process The impact is great.

Talc Uses

Talc has excellent physical and chemical properties such as lubricity, anti-sticking, flow aid, fire resistance, acid resistance, insulation, high melting point, chemical inactivity, good hiding power, softness, good gloss, and strong adsorption. Therefore, talc has a wide range of uses in cosmetics, medicine, papermaking, plastics and other fields.

Cosmetics Field

Used in various emollient powder, beauty powder, talcum powder, etc. It has the effect of blocking infrared rays, so it enhances the sunscreen and anti-infrared properties of cosmetics.

Medicine-food Field

Used as additives for pharmaceutical tablets, pharmaceutical powders (such as argafen powder), sugar coatings, prickly heat powder, Chinese medicine prescriptions, food additives, release agents, etc. It has the characteristics of non-toxic, odorless, high whiteness, good compatibility, strong gloss, soft taste and strong smoothness. In the field of coatings, it is used for white body pigments and various water-based, oil-based, resin industrial coatings, primers, protective paints, etc. Increase the stability of the product shape.

Papermaking Field

It is used as filler for all kinds of paper and cardboard, wood asphalt control agent. It can achieve smooth and delicate paper, save raw materials, and improve the service life of the grease net.

Plastic Field

It is used as a filler for polypropylene, nylon, polyvinyl chloride, polyethylene, polystyrene, polyester and other plastics. Increase tensile strength, shear strength, bending strength, pressure strength, and reduce deformation.

Rubber Field

Used as anti-sticking agent for rubber packing and rubber products. Increase the stability of the product shape, increase the tensile strength, shear strength, bending strength, and pressure strength. In the cable field, it is used as a cable rubber extender and cable isolating agent.

Ceramics Field

Used in the manufacture of electric porcelain, radio porcelain, various industrial ceramics, architectural ceramics, daily-use ceramics and enamels, etc. It has the characteristics of no discoloration at high temperature, enhanced whiteness after calcination, uniform density, good gloss and smooth surface.

Waterproof Material Field

Used for waterproofing membrane, waterproof coating, waterproof ointment, etc.

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