PTFE (Polytetrafluoroethylene) is a high-performance fluoropolymer with a unique combination of physical properties that make it invaluable in industries ranging from aerospace to medical devices. Beyond its well-known chemical resistance and non-stick characteristics, PTFE exhibits exceptional mechanical, thermal, and electrical properties. These include high flexural strength at low temperatures, outstanding dielectric strength, and a remarkably low coefficient of friction. Its density, UV resistance, and autoclavability further enhance its versatility, making it suitable for demanding applications where other materials would fail. For specialized needs, custom PTFE parts can be engineered to leverage these properties in tailored solutions.
Key Points Explained:
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Mechanical Properties
- Tensile Strength: 6,240 psi, providing durability under stress.
- Hardness: R58 on the Rockwell scale, indicating moderate rigidity.
- Flexural Strength: Maintains integrity even at extremely low temperatures.
- Specific Gravity/Density: 2.2 g/cm³ (or 2200 kg/m³), making it denser than many plastics.
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Thermal and Flame Resistance
- Melting Point: 327°C, far exceeding conventional plastics.
- Flammability Rating: V0 (self-extinguishing), with a limiting oxygen index of 95%.
- Autoclavable: Can withstand repeated steam sterilization, ideal for medical use.
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Electrical and Optical Traits
- Dielectric Strength: Excellent insulator, resistant to electrical currents.
- Refractive Index: 1.38, useful in optical applications.
- UV Resistance: Unaffected by prolonged ultraviolet exposure.
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Surface and Chemical Behavior
- Coefficient of Friction: Among the lowest of any solid, enabling self-lubrication.
- Hydrophobicity: Water absorption of just 0.01% over 24 hours.
- Chemical Inertness: Non-reactive due to strong carbon-fluorine bonds.
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Limitations
- Radiation Resistance: Poor performance under ionizing radiation.
- Opacity: Naturally opaque, limiting use in transparent applications.
These properties collectively make PTFE a material of choice for seals, bearings, and insulating components, especially when custom PTFE parts are required to meet precise specifications. Its balance of strength, resilience, and inertness ensures reliability in environments where failure is not an option.
Summary Table:
| Property | Value/Description | Application Benefit |
|---|---|---|
| Tensile Strength | 6,240 psi | Durability under mechanical stress |
| Melting Point | 327°C | High-temperature stability |
| Dielectric Strength | Excellent insulator | Reliable electrical insulation |
| Coefficient of Friction | Among the lowest of any solid | Self-lubricating for low-wear applications |
| Chemical Inertness | Non-reactive (strong C-F bonds) | Resistance to corrosive environments |
| UV Resistance | Unaffected by prolonged exposure | Outdoor or UV-exposed applications |
| Limitations | Poor radiation resistance, opaque | Avoid in nuclear/transparent uses |
Upgrade your components with PTFE’s unmatched properties!
KINTEK specializes in precision-engineered PTFE solutions for semiconductors, medical devices, and industrial applications. From custom seals to high-volume labware, we deliver materials that excel in extreme conditions. Contact our team to discuss your project needs and leverage PTFE’s full potential.