Expanded polytetrafluoroethylene eptfe is high-porosity polytetrafluoroethylene materials produced by controlled biaxial stretching, typically achieving 50 %–95 % porosity with a node-fibril microstructure.
I. Typical specifications for sheet materials
| Thickness | 0.5 - 10mm |
| Density | 0.7-0.9g/cm³ |
| Standard Size | 1500x1500mm/1500x4500mm/1800x1800mm/1800x5400mm |
| Temperature Range | -200 ~ + 260 ℃ |
| Compressibility | 45+/-5cm³/s |
| Rebound Rate | ≥10.0 |
| Sealing Leakage Rate | ≥1.0x10¯³ |
Biggest difference between ePTFE and regular PTFE
| Item | PTFE | ePTFE |
| Structure | 100% dense, non-porous | Micropores |
| Feature | Hard | Flexible、Elastic |
| Density | 2.1-2.3g/cm³ | 0.7-0.9g/cm³ |
| Compressibility | Almost incompressible | Compressible and has good resilience |
| Processing method | Only turning and molding are allowed |
Main industrial applications of expanded polytetrafluoroethylene eptfe
- Semiconductor and Electronics Manufacturing Equipment
- New Energy Batteries and Hydrogen Energy
- Chemicals and Petrochemicals
- Industrial Filtration and Environmental Protection
In short, the true value of expanded polytetrafluoroethylene eptfe lies in their perfect combination of PTFE's extreme chemical inertness, temperature resistance, and biocompatibility with the breathability, moisture permeability, compressibility, and lightweight properties brought by its porous structure. This allows industrial design to simultaneously possess seemingly contradictory properties for the first time: absolutely resistant to corrosion, high temperatures, and aging, yet capable of free moisture and pressure release, preventing stuffiness, condensation, weight gain, and sacrificing sealing performance. This is precisely why, over the past decade, it has rapidly penetrated from the medical and outdoor consumer goods sectors into the most demanding industrial scenarios such as semiconductors, new energy, chemicals, 5G/6G communications, and aerospace, becoming an increasingly indispensable core material for high-end equipment.
