PTFE wear plates, particularly ptfe slide bearing plates, are widely used in heavy-duty applications due to their exceptional load-bearing capacity and low friction properties. With a compressive strength of 135-140 kg/cm², a standard 100mm x 100mm PTFE plate can support 13.5-14 tonnes of vertical load, far exceeding typical industrial demands of 5-6 tonnes. Beyond mechanical strength, PTFE's friction-reducing properties under pressure enhance operational smoothness, while its chemical inertness, thermal stability (up to 260°C), and resistance to wear make it ideal for harsh environments. These characteristics ensure reliability in high-stress applications like bridge bearings, heavy machinery, and chemical processing equipment.
Key Points Explained:
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Compressive Strength and Load Capacity
- PTFE's compressive strength ranges from 135-140 kg/cm², translating to impressive load-bearing capabilities. For example:
- A 100mm × 100mm plate can support 13.5–14 tonnes of vertical load.
- This exceeds typical industrial requirements (5–6 tonnes), making it suitable for heavy-duty applications like bridge expansions or industrial machinery.
- PTFE's compressive strength ranges from 135-140 kg/cm², translating to impressive load-bearing capabilities. For example:
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Friction and Performance Under Load
- PTFE’s coefficient of friction decreases under higher pressure, ensuring smoother operation in high-load scenarios (e.g., sliding bearings in seismic structures).
- This self-lubricating property reduces wear and maintenance needs, even in continuous-use environments.
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Chemical and Thermal Resistance
- PTFE is inert to most chemicals, including acids, bases, and solvents, making it ideal for corrosive environments (e.g., chemical plants).
- It operates reliably in temperatures from -200°C to 260°C, maintaining structural integrity under thermal cycling.
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Additional Durability Factors
- Flammability rating of V0 and 0.01% water absorption ensure safety and dimensional stability in humid or high-heat conditions.
- Poor radiation resistance limits use in nuclear applications, but its 95% limiting oxygen index enhances fire safety.
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Practical Applications
- Common uses include:
- Sliding bearings in infrastructure (bridges, dams).
- Liners for hoppers and chutes in mining.
- Seals and gaskets in chemical processing equipment.
- Its low density (2.2 g/cm³) allows for lightweight yet robust solutions.
- Common uses include:
For purchasers, selecting PTFE wear plates involves verifying thickness and reinforcement (e.g., glass-fiber backing for higher loads) to match specific operational stresses. Its balance of strength, friction reduction, and environmental resistance makes it a versatile choice for demanding mechanical systems.
Summary Table:
| Property | PTFE Wear Plate Specification |
|---|---|
| Compressive Strength | 135–140 kg/cm² (13.5–14 tonnes/100mm²) |
| Friction Coefficient | Decreases under pressure (self-lubricating) |
| Thermal Stability | -200°C to 260°C |
| Chemical Resistance | Inert to acids, bases, solvents |
| Flammability Rating | V0 (high fire safety) |
| Common Applications | Bridge bearings, machinery liners, seals |
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