The coefficient of friction for Pure Teflon (PTFE) typically ranges between 0.04 and 0.10, depending on whether it is measured under static or dynamic conditions. This exceptionally low friction makes PTFE one of the slipperiest solid materials, comparable to ice. Its unique molecular structure, combining carbon and fluorine atoms, contributes to its non-stick properties, chemical resistance, and thermal stability. These characteristics make PTFE ideal for applications requiring durability, low friction, and resistance to harsh environments, such as non-stick coatings, bearings, and seals.
Key Points Explained:
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Coefficient of Friction Range
- Static Friction: 0.04–0.08
- Dynamic Friction: 0.02–0.06
- The average range is often cited as 0.05–0.10, making PTFE (Teflon) the third lowest-friction solid material known.
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Why PTFE Has Low Friction
- The molecular structure of PTFE (carbon-fluorine chains) creates a smooth, non-reactive surface.
- Weak intermolecular forces reduce adhesion, allowing surfaces to slide easily.
- Its friction is comparable to ice, as noted in industrial comparisons.
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Key Properties Supporting Low Friction
- Hardness: 55–60 Shore D (moderately soft, reducing surface abrasion).
- Tensile Strength: 20–30 MPa (balances durability with flexibility).
- Thermal Stability: Stable up to 260°C (500°F), maintaining low friction across temperatures.
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Applications Leveraging Low Friction
- Non-stick coatings (e.g., cookware).
- Bearings and seals in machinery (reducing wear).
- Medical devices (e.g., catheters, where smooth movement is critical).
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Comparative Advantages
- Lower friction than most plastics (e.g., nylon, polyethylene).
- Superior chemical resistance complements its slipperiness in corrosive environments.
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Measurement Context
- Friction values are typically measured against steel or similar hard surfaces.
- Environmental factors (temperature, load) can slightly alter the coefficient.
PTFE’s combination of low friction, chemical inertness, and thermal resilience makes it indispensable in industries where performance under extreme conditions is required. Have you considered how its properties might solve specific friction-related challenges in your projects?
Summary Table:
| Property | Value/Description |
|---|---|
| Static Friction | 0.04–0.08 |
| Dynamic Friction | 0.02–0.06 |
| Hardness (Shore D) | 55–60 |
| Tensile Strength | 20–30 MPa |
| Thermal Stability | Up to 260°C (500°F) |
| Key Applications | Non-stick coatings, bearings, medical devices |
Optimize your projects with PTFE’s unmatched low friction!
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Contact us today to discuss how PTFE can enhance your application!
