Our modified wollastonite powder is a high-performance acicular inorganic filler specially designed for rubber and plastic modification. With unique needle-shaped crystal structure, high purity and excellent surface activity, it delivers outstanding toughening, reinforcing and anti-cracking effects compared with conventional talc powder and calcium carbonate. It effectively improves tensile strength, impact toughness, rigidity and dimensional stability of plastic and rubber products, reduces shrinkage and deformation, and enhances abrasion resistance and thermal stability. Featuring great compatibility and dispersion with PP, PE, PVC, EVA and various rubber materials, this wollastonite powder optimizes extrusion and injection molding performance while lowering overall formulation costs. It is widely used in modified plastics, engineering plastics, wire and cable materials, rubber products and other industrial fields.
| Item | Typical Value | Test Method |
|---|---|---|
| Product Description | Acicular surface modified wollastonite powder for plastic & rubber toughening filler | – |
| Whiteness | ≥92% | ISO 2469 |
| CaSiO₃ Content | ≥94% | Chemical analysis |
| Moisture | ≤0.3% | ISO 787-2 |
| Loss on Ignition (LOI) | ≤2.5% | ISO 11632 |
| pH Value | 9.0 ~ 10.5 | 10% water suspension |
| Median Particle Size D50 | 3~10 μm (customizable) | Laser particle size analyzer |
| Aspect Ratio (Needle shape) | 8:1 ~15:1 | Microscope |
| Oil Absorption | 28~36 g/100g | ISO 787-5 |
| Surface Treatment | Silane coupling agent modified | – |
| Heavy Metal (Pb) | ≤20 ppm | RoHS |
| Application | Modified PP/PE/PVC, engineering plastic, rubber compound, cable material | – |
| Packing | 25kg woven bag | – |
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