2500 mesh talc powder

Core Physical Indicators

• Fineness: 2500 mesh refers to its particle size distribution. The average particle size (D50) is typically around 5-10 micrometers, and the maximum particle size generally does not exceed 20 micrometers. This size is close to or has reached the sub-micron level.

• Specific Surface Area: Very large, as the particles are extremely fine, resulting in a significantly increased surface area per unit mass.

• Whiteness: Very high, usually greater than 90%, and can even reach 94-96%, with a clean white appearance.

• Purity: High content of SiO₂ and MgO, with low impurity content (such as iron, calcium, etc.).

Key Features

1. Exceptional Fineness and Smooth Touch

This is its most prominent feature. Due to its extremely fine particles, it provides an unusually smooth and delicate texture when incorporated into materials. When used in coatings and cosmetics, it offers a silky skin feel; when used in plastics, it significantly reduces the surface roughness of the products.

2. Excellent Dispersibility and Compatibility

The ultra-fine particles are easier to uniformly disperse in other matrices (such as resins, coatings, and cosmetic substrates), with less tendency to agglomerate, forming a more stable and homogeneous composite system.

3. Strong Reinforcing and Toughening Effects

In plastics (such as PP, PA, ABS, etc.) and rubbers, the nano/micro-level lamellar structure can effectively reinforce the materials, improving their rigidity, flexural modulus, dimensional stability, and heat distortion temperature, while having a minimal impact on toughness, achieving a good balance.

4. Superior Surface Gloss Enhancement

When added to coatings, inks, and plastics, it greatly enhances the surface gloss and fullness of the finished products. The extremely fine particles do not cause significant light scattering, making the surface appear brighter.

5. Good Transparency or Semi-Transparency

Since its particle size is much smaller than the wavelength of visible light (0.4-0.7 micrometers), it scatters and obstructs light minimally. Therefore, in thin films, thin-walled plastic products, and high-quality coatings, it can maintain good transparency, which is not achievable with low-grade talcum powder.

High-efficiency barrier performance

• The ultra-fine talc powder with a flaky structure forms a more dense and tortuous path within the substrate, effectively blocking the passage of gases and water vapor, thereby enhancing the material's barrier properties.

7. Chemical Inertness and Safety

• Talc powder itself has stable chemical properties, is non-toxic, odorless, and non-irritating. High-purity 2500-mesh talc powder contains no asbestos and meets the strict regulatory requirements for materials in contact with cosmetics and food/drugs (such as FDA).

8. Adsorption and Thixotropy

• Its huge specific surface area gives it certain adsorption capacity. In liquid systems (such as coatings), it can help adjust viscosity, provide good thixotropy, and prevent sagging.