Pure Talc Powder CAS 14807-96-6

Pure talc powder is an industrial product, white to almost white fine powder, odorless and tasteless. Insoluble in water. It is talc group talc of magnesium silicate minerals. It has excellent physical and chemical properties such as lubricity, fire resistance, acid resistance, insulation, high melting point, inactive chemical property, good covering power, softness, good gloss, strong adsorption, etc. Since the crystal structure of talc is layered, it has the tendency to split into scales and special lubricity. It is often used for fillers of plastic and paper products, rubber fillers and anti-sticking agents of rubber products, high-grade paint coatings, etc.

1. Application in coating:

Pure talc powder has good suspension and dispersibility, and low corrosivity. In the coating, talc powder as a filler can play a skeleton role, reduce the manufacturing cost and improve the film hardness of the coating. It also has the characteristics of improving the stability of product shape, increasing tensile strength, shear strength, pressure strength, reducing deformation, elongation, coefficient of thermal expansion, high whiteness, and strong particle size uniformity and dispersion. The talc powder with flake particle structure can make the coating film have high water resistance and impermeability of enamel, while the talc powder with fibrous particle structure can improve the rheology and leveling of the coating, and also improve the weather resistance of the coating.

Talcum powder is mainly used for primer and intermediate coating, and talcum powder is preferred for many products and flash primer and paint for transportation tools. The primer for steel structure can be completely or partially applied with talcum powder to improve the sedimentation of the coating, the mechanical force of the coating film and the recoating property.

2. Application in plastics:

Inorganic fillers play an important role in the modification of plastics and become an indispensable modifier. Talc powder with white flake structure is an effective reinforcing material in plastics. It can give plastics high rigidity, creep resistance and good solid luster no matter at room temperature or high temperature. The addition of talcum powder can change many properties of plastics, such as molding shrinkage, surface hardness, bending modulus, tensile strength, impact strength, thermal deformation temperature, molding process and product dimensional stability. Adding talcum powder into polyethylene and polypropylene plastics can effectively improve the surface hardness and scratch resistance of products. It is well known that the price of talc powder is 10%~20% of that of plastics. Therefore, the application of talc powder in plastics can not only improve the performance, but also effectively reduce the cost of materials and improve the economic benefits of enterprises.

3. Application in papermaking:

Talc powder has unique properties such as layered structure, softness, hydrophobicity, etc. It has significant advantages when applied to the paper industry:

(1) It is helpful to improve the retention rate of filler, improve the opacity, smoothness and printability of the paper, and endow the paper with high ink absorption;

(2) Stable chemical properties, not only suitable for paper making under acidic conditions, but also can be used with calcium carbonate in neutral conditions;

(3) Its surface is hydrophobic (lipophilic), and organic matter is easily adsorbed on its layered surface. The addition of talcum powder reduces the consumption of dyes and effectively saves costs. In addition, its lipophilicity makes it useful as resin, adhesive inhibitor and waste paper deinking agent;

(4) It can be well combined with sizing agent to improve the retention of sizing agent, reduce the absorbability of the paper and prevent printing ink from penetrating the paper;

(5) Talc powder has a low friction coefficient, which can make the coating surface smooth and smooth, reduce the fracture of the coating and reduce the printing pressure;

(6) As a coating pigment with high shape ratio, talc powder has excellent fiber coverage ability and good printing effect, and can also improve the quality of intaglio printing;

(7) Talcum powder has special lubricity. The coated paper made of talcum powder can obtain high finish on the calender and reduce the amount of lubricant used in the coating.

4. Food application:

Pure talc powder is used as an additive in medicine and food industry. It has the characteristics of non-toxic, tasteless, soft taste and strong smoothness, so it can be eaten, but excessive use or long-term consumption is carcinogenic.

Type of pure talc powder:

1. Chemical grade:

Use: used in rubber, plastic, paint and other chemical industries as a reinforcing and modifying filler. Features: increase the stability of the product shape, increase the tensile strength, shear strength, flexural strength, pressure strength, reduce the deformation, elongation, thermal expansion coefficient, high whiteness, strong particle size uniformity and dispersion.

2. Ceramic grade:

Purpose: Used for manufacturing high-frequency ceramics, radio ceramics, various industrial ceramics, architectural ceramics, daily ceramics and ceramic glaze. Features: no discoloration at high temperature, enhanced whiteness after calcination, uniform density, good gloss and smooth surface.

3. Cosmetic grade:

Purpose: It is a high-quality filling agent in the cosmetics industry. Features: It contains a large amount of silicon. It has the function of blocking infrared rays, thus enhancing the sunscreen and anti-infrared properties of cosmetics.

4. Pharmaceutical food grade:

Use: used as additive in medicine and food industry. Features: non-toxic, tasteless, high whiteness, good compatibility, strong glossiness, soft taste and strong smoothness. The PH value is 7-9, which will not degrade the characteristics of the original product.

5. Paper grade:

Purpose: It is used for various products of high and low grade paper industry. Features: Paper powder has the characteristics of high whiteness, stable particle size and low abrasion. The paper made with this powder can achieve smoothness, delicacy, save raw materials and improve the service life of the paper.

6. Brucite powder:

Purpose: Used for manufacturing electric porcelain, wireless electric porcelain, various industrial ceramics, architectural ceramics, daily ceramics and ceramic glaze. Features: no discoloration at high temperature, enhanced whiteness after calcination, uniform density, good gloss, and smooth surface.

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