Glass-filled PTFE combines the inherent benefits of PTFE with enhanced mechanical and thermal properties due to the addition of glass fibers. This composite material offers improved wear resistance, compression strength, and creep resistance while maintaining chemical inertness. It is suitable for demanding applications like bearings, seals, and gaskets, operating in extreme temperatures (-268°C to +260°C). However, its abrasive nature requires careful selection of mating surfaces. The glass fiber content typically ranges from 5% to 40%, with 25% being common for optimal performance.
Key Points Explained:
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Enhanced Mechanical Properties
- Wear Resistance: Glass fibers significantly reduce wear, making it ideal for moving parts like custom ptfe bearings and seals.
- Compression Strength: Withstands higher loads without permanent deformation, useful in gaskets and compressor rings.
- Creep Resistance: Reduces cold flow under sustained pressure, maintaining seal integrity over time.
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Thermal Stability
- Operates reliably from cryogenic (-268°C) to high temperatures (+260°C).
- Lower thermal expansion compared to unfilled PTFE, ensuring dimensional stability.
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Chemical Resistance
- Retains PTFE’s inertness, resisting most chemicals except hydrofluoric acid and strong caustics.
- Performs well in oxidizing environments, suitable for pharmaceutical and food industries.
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Trade-offs and Considerations
- Abrasiveness: Glass fibers can wear down softer mating surfaces; recommended for use with hardened shafts (>62 Rockwell C).
- Reduced Flexibility: Stiffer than virgin PTFE, which may limit use in applications requiring high elasticity.
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Applications
- Self-lubricating components (bearings, bushings).
- High-pressure seals and gaskets.
- Industrial equipment requiring low friction (coefficient ~0.06) and durability.
By balancing performance enhancements with material limitations, glass-filled PTFE provides a versatile solution for specialized engineering needs.
Summary Table:
| Property | Glass-Filled PTFE | Standard PTFE |
|---|---|---|
| Wear Resistance | High (reduced abrasion) | Moderate |
| Compression Strength | Excellent (handles heavy loads) | Low |
| Thermal Range | -268°C to +260°C | -200°C to +260°C |
| Chemical Resistance | Resists most chemicals (except HF/caustics) | Same |
| Flexibility | Stiffer | Highly flexible |
Upgrade your components with KINTEK’s precision-engineered glass-filled PTFE solutions—ideal for bearings, seals, and gaskets in extreme conditions. Our custom fabrication ensures optimal performance for your specific needs, from prototypes to high-volume orders. Contact our experts today to discuss your project!