Classification use of Liaoning talcum powder:
First, the composition characteristics of talc
The main component of talc is hydrated magnesium silicate, the molecular formula is 3MgO · 4SiO2 · H2O, English name: Talc. Talc is a monoclinic system. The crystals are in the shape of a pseudo-hexagonal rhombus. The ore is usually formed into dense massive, leaf-like, radial, fibrous aggregates. Colorless transparent white, but because it contains a small amount of impurities, it appears light green, light yellow, light brown, light red even black; cleaving surface is pearly luster. Soft, with a Mohs hardness of 1-1.5 a specific gravity of 2.7-2.8. Talc powder is made talc block through multiple processes such as screening, cleaning, drying, ingredients, grinding, classification, packaging other processes. It is a white powder with a smooth feel, obvious lubricity, fire resistance, acid resistance, Excellent physical chemical properties such as insulation, high melting point, chemical inactivity, strong adsorption. Talcum powder has different classifications according to different ingredients, places of origin, color. Because of its inherent qualities, it is widely used in coatings, paints, plastics, paper, ceramics, cosmetics, pharmaceuticals, food, daily necessities other industries.
Classification use of talc
1.Chemical grade talcum powder
Uses: Mainly used in rubber, plastic, paint, coating other chemical industries as modified fillers. Features: increase the stability of product shape, increase adhesion, filling, hiding power, sanding, increase tensile strength, shear strength, bending strength, pressure strength, reduce deformation, elongation, thermal expansion coefficient, etc. Uniform particle size good dispersibility.
2.Ceramic grade talcum powder
Uses: Used in the manufacture of high-frequency porcelain, radio porcelain, various industrial ceramics, architectural ceramics, daily-use ceramics ceramic glazes. Features: High temperature does change color, whiteness increases after calcination, uniform density, good gloss, smooth surface.
3. Cosmetic grade talcum powder
Uses: It is a high-quality filler for the cosmetics industry. Features: Contains a large amount of silicon. It has the function of blocking infrared rays, thus enhancing the sun-shielding infrared-resistant properties of cosmetics. At the same time, talcum powder is slippery has a pearly luster, which has certain protection beauty effects on the skin. It is easy to clean, non-toxic harmless.
4.Food grade talcum powder
Uses: Used as additives in the food industry. Features: non-toxic, tasteless, high whiteness, good compatibility, good gloss, soft taste, strong smoothness, etc. The PH value is 7-9, which will change degrade the physical properties of the original product. It is a high-quality stable filling additive for the food pharmaceutical industries.
Uses: used as a filler for various high low grade paper industry products. Features: Paper-making talc has the characteristics of high whiteness, stable particle size, low abrasion. Paper made with talcum powder can achieve the characteristics of smooth, delicate surface, high gloss, good toughness, strong hygroscopicity. Adding to the formula can save atomic materials increase the service life of the grease net.
6.Talcum powder for other purposes
The performance of talcum powder determines its wide range of uses. In addition to the above-mentioned uses, it can also be used for isolation of wire cable production, mold release, moisture absorption lubrication of daily life, sports casting marking. The main uses of talcum powder are slippery, soft, dry resistant to high temperatures.