Teflon PTFE sheets are composed of polytetrafluoroethylene (PTFE), a synthetic fluoropolymer renowned for its exceptional performance in extreme conditions. These sheets combine unique chemical and physical properties, making them indispensable in industries ranging from aerospace to food processing. Their versatility stems from a molecular structure where carbon atoms are fully shielded by fluorine atoms, creating an inert surface resistant to nearly all chemicals and extreme temperatures.
Key Points Explained:
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Composition of PTFE Teflon Sheets
- Made from polytetrafluoroethylene (PTFE), a high-molecular-weight polymer consisting of carbon and fluorine atoms.
- The fully fluorinated structure provides unmatched chemical inertness and thermal stability.
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Key Properties
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Temperature Resistance:
- Operates reliably from -400°F to +550°F (-240°C to +288°C), with short-term tolerance up to 600°F (316°C).
- Maintains dimensional stability with a melting point of 327°C.
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Chemical Inertness:
- Resists virtually all acids, bases, and solvents, including aqua regia and hydrofluoric acid.
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Low Friction:
- Boasts the lowest coefficient of friction (0.05–0.10) among solids, enabling self-lubricating applications.
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Electrical Properties:
- Excellent dielectric strength (40–60 kV/mm) and high resistivity (10¹⁶–10¹⁸ Ω·cm), ideal for insulating components.
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Non-Stick Surface:
- Anti-adhesive qualities prevent material buildup, simplifying cleaning and reducing contamination risks.
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Temperature Resistance:
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Physical Characteristics
- Density ranges from 2.13–2.20 g/cm³, offering lightweight durability.
- Low thermal conductivity (0.25–0.29 W/(m·K)) enhances insulation performance.
- UV resistance ensures longevity in outdoor applications.
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Industrial Advantages
- Reusability: Cost-effective due to long service life and minimal maintenance.
- Versatility: Used in gaskets, bearings, lab equipment, and food processing liners.
- Safety: FDA-compliant grades are safe for food contact and medical applications.
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Performance in Extreme Conditions
- Fatigue-resistant under cyclic loading, suitable for dynamic applications like seals.
- Creep-resistant at high temperatures, maintaining structural integrity under stress.
For equipment purchasers, these properties translate to reduced downtime, lower replacement costs, and enhanced process reliability. Whether selecting sheets for high-temperature masking or chemical-resistant liners, PTFE’s balanced performance justifies its premium positioning in industrial materials.
Summary Table:
| Property | Specification |
|---|---|
| Composition | Polytetrafluoroethylene (PTFE) with carbon-fluorine backbone |
| Temperature Range | -400°F to +550°F (-240°C to +288°C); short-term up to 600°F (316°C) |
| Chemical Resistance | Resists all acids, bases, and solvents (e.g., aqua regia, hydrofluoric acid) |
| Coefficient of Friction | 0.05–0.10 (lowest among solids) |
| Dielectric Strength | 40–60 kV/mm |
| Density | 2.13–2.20 g/cm³ |
| Key Applications | Gaskets, bearings, lab equipment, food processing liners, electrical insulation |
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