25% Glass Filled PTFE
The glass fiber content in PTFE can be 3%, 5%, 10%, 15%, 20%, or 25%. Get glass-filled PTFE material from us. Best price, short delivery time.
Welcome to Learning about 25% Glass-Filled PTFE
25% glass-filled PTFE material is a reinforced PTFE material. It is pure PTFE with 25% glass fibres added as fillers to improve the material’s mechanical properties. This material has a higher coefficient of friction but better extrusion resistance than pure PTFE materials. Glass fibre is the most common PTFE filler, and it increases the wear and creep resistance of PTFE.
The material is available in rod, tube, and sheet forms. The most common glass fibre percentages in PTFE are 5%, 8%, 10%, 15%, 20%, and 25%.
Application
25% glass-filled PTFE is typically used in seal components for dynamic applications. The material is very commonly used in valve seat applications. It also prefers a lubricated environment and is used to seal against steel, stainless steel, and chromium-plated surfaces.
Key Properties
- Very Low Coefficient of Friction
- Excellent Chemical Resistance
- Excellent Dielectric Properties
- Resistance to Weathering
- Self-Lubricating
Physical Properties of 25% Glass Filled PTFE
| Test Items | Test Methods | Unit | 15% Glass Fiber | 25% Glass Fiber |
|---|---|---|---|---|
| Density | ASTM D792 | g/cm3 | 2.25 | 2.25 |
| Hardness Shore D | ASTM D2240 | Sh.D | 60 | 58 |
| Tensile strength | ASTM D638 | mpa | 22 | 21 |
| Elongation at break 23°C | ASTM D638 | % | 230 | 210 |
| Coefficient of static friction | ASTM D1894 | - | 0.16 | 0.18 |
| Thermal conductivity 23°C | DIN 52612 | W/K.m | 0.39 | 0.46 |
| Max water absorption | ASTM D570 | % | 0.015 | 0.02 |
