Grade 1–40.5–8 mm8–15× expansion
Unexpanded Raw Vermiculite Flakes
Dense Unfired Vermiculite Concentrate for Self-Expansion and Friction Applications. Unexpanded raw vermiculite flakes in Grade 1–4 (0.5–8 mm) with a controlled 8–15× exfoliation ratio. Supplied to brake-pad friction compounders and overseas self-expansion furnace operators as a stable, asbestos-free raw feedstock.
Key Technical Highlights
- Available Grades: Grade 1–4 (0.5–8 mm particle size)
- Expansion Ratio: 8–15× (raw → exfoliated)
- Composition: Hydrous phyllosilicate, 100% asbestos-free (ISO 14993)
- Logistics Advantage: High bulk density lowers freight cost vs. expanded grades
Available Grades
| Grade | Particle Size | Typical Applications |
|---|---|---|
| Grade 1 (Coarse) | 4 – 8 mm | Overseas self-expansion furnaces, horticultural exfoliation |
| Grade 2 (Medium) | 2 – 4 mm | Brake-pad friction filler, refractory loose fill |
| Grade 3–4 (Fine) | 0.5 – 2 mm | Friction compounds, foundry & steelworks insulation |
Technical Data Sheet (TDS)
| Specification Parameter | Typical Value |
|---|---|
| Expansion Ratio | 8 – 15 × (raw → exfoliated) |
| Particle Size | 0.5 – 8 mm (Grade 1–4) |
| Bulk Density (raw) | 650 – 850 kg/m³ |
| Moisture Content | ≤ 5% |
| Fire Rating (after expansion) | Class A1 non-combustible (EN 13501-1) |
| Asbestos Content | 0% (Certified Asbestos-Free, ISO 14993) |
Key Industrial Applications
- Brake-Pad Friction Fillers: 0.15–1.0 mm friction grade for stable coefficient of friction.
- Overseas Self-Expansion: Dense raw feedstock for on-site exfoliation into lightweight granules.
- Refractory & Foundry: Loose-fill insulation and hot-topping compounds for molten metal.
Packaging & Shipping
Packaging25 kg / 50 kg PE-lined woven bags, or 1000 kg FIBC jumbo bags.
LoadingPalletized with heat-treated wooden pallets (ISPM 15 compliant) & shrink wrap.
Shipping ReferenceApprox. 22-26 MT per 20ft container (FCL, weight-based).