Glass Fiber Powder Technical Data Sheet (TDS)
Glass Fiber Powder is a fine, milled form of E-glass or C-glass fiber, widely used as a functional filler and reinforcement additive in thermoplastics, thermosets, coatings, adhesives, and composite compounds. It improves mechanical strength, dimensional stability, thermal resistance, and abrasion properties without compromising surface finish.
Product Description
| property | value |
|---|
| Product Type | Milled Glass Fiber Powder / Micro Glass Fiber Filler |
| Base Material | E-glass (alkali-free), optionally C-glass or AR-glass |
| Form | White or off-white free-flowing powder |
| Surface Treatment | Silane or unsized (customizable for resin compatibility) |
| Typical Particle Shape | Irregular angular short fibers or flakes |
Technical Specifications
| property | value |
|---|
| Average Fiber Length | 50 – 300 μm |
| Bulk Density | 0.3 – 0.6 g/cm³ |
| Specific Gravity | ~2.6 g/cm³ |
| Moisture Content | < 0.2% |
| Loss on Ignition (LOI) | 0.5 – 2.0% (depends on sizing) |
| Oil Absorption | ≤ 40 g/100g |
| pH Value (aqueous suspension) | 9 – 10.5 |
| Color | White to light gray |
| Refractive Index | ~1.55 |
Functional Benefits
| property | value |
|---|
| Reinforcement Effect | Improves tensile, impact, and flexural strength of matrix |
| Dimensional Stability | Reduces shrinkage and warping during molding/cure |
| Thermal Resistance | Enhances heat deflection temperature (HDT) and insulation |
| Abrasion Resistance | Improves surface hardness and wear resistance |
| Low Resin Demand | Fine particle size reduces excess resin consumption |
| High Dispersibility | Compatible with high-shear and extrusion processes |
Recommended Applications
| property | value |
|---|
| Thermoplastics & Thermosets | PP, PA, PC, ABS, epoxy, PU, phenolic compounds |
| Adhesives & Sealants | Used in epoxy, silicone, PU adhesives for gap filling & reinforcement |
| Paints & Coatings | Improves mechanical strength, scratch resistance, thermal stability |
| Brake Pads & Friction Materials | Thermal stability and fade resistance |
| 3D Printing Filaments | Reinforcement additive for engineering-grade filaments |
| Casting & Flooring | Added to casting resins and terrazzo for reinforcement |
Processing Guidelines
- Ensure uniform dispersion using high-speed mixers, twin-screw extruders, or ball mills
- Match sizing treatment with matrix resin type (e.g. silane for epoxy, polyester, or nylon)
- Control moisture content below 0.2% to avoid voids and bubbles
- Powder form allows high loading ratios (up to 30% wt) depending on application
- Wear dust control gear during bulk handling to comply with safety standards
Packaging & Storage
| property | value |
|---|
| Packaging Form | 20 kg paper bags, 500–1000 kg big bags (FIBCs) on pallets |
| Sealing | Moisture-proof inner liner |
| Storage Environment | Dry, covered, ventilated area at 5–35°C |
| Shelf Life | 12 months under dry and sealed storage |
Quality Control & Standards
- Particle size distribution via laser diffraction or sieve analysis
- LOI and moisture content per ASTM D3171 / ISO 1887
- Appearance, color tone, bulk flowability inspection
- Fiber glass integrity (no over-ground fiber balls or fused clusters)
- Resin compatibility testing based on customer formulation
Customized grades available with surface modifiers for PA6, PBT, epoxy, and PP matrices. Contact us for SDS, COA, and injection-grade formulation suggestions.
