PTFE Powder (Polytetrafluoroethylene) is a high-performance additive used as an anti-dripping agent in flame-retardant thermoplastics. Its fine particle size and fibrous structure help control melt behavior and prevent flaming droplets. It is widely used in wire & cable, electronic components, automotive plastics, and high-end engineering materials.
| Property | Typical Value |
|---|---|
| Appearance | White ultrafine powder |
| Average Particle Size | 3 – 8 μm |
| Melting Point | 327 °C |
| Specific Surface Area | 2 – 5 m²/g |
| Volatility | ≤ 0.5% |
| Content | ≥ 99% |
| Problem | Solution |
|---|---|
| Flaming drip during fire | PTFE creates fibrous net to stop droplet formation |
| Poor flame rating (UL94) | Helps meet V-0 rating in formulations |
| Scratches on surface | Improves surface resistance and anti-friction |
| Thermal instability during extrusion | Increases melt strength and stability |
Q1: What is the typical dosage in flame retardant systems?
Usually 0.1% – 0.5% depending on formulation and desired flame rating.
Q2: Does PTFE affect transparency?
Yes, it may reduce clarity in transparent resins; not suitable for clear products.
Q3: Is it safe to process PTFE at high temperatures?
Yes, but avoid overheating above 400 °C to prevent decomposition fumes.
