100% PTFE expanded sheet for flanges — FDA compliant.
Expanded PTFE sheet (soft fibrillated PTFE sheet) is made of 100% PTFE through a special process that forms countless fine, soft, multidirectional fibres. It has high tensile strength, low creep, wide temperature resistance and corrosion resistance, with no asbestos and no additives — non-toxic, ageing resistant and compliant with FDA requirements.
After compression the fibres tangle and become denser, airtight and watertight, improving anti-leakage performance. Under severe corrosive and high-temperature conditions it still maintains excellent sealing. Its high conformity also makes it suitable for crude or damaged flanges.
| Property | Value |
| Temperature range | -260 °C to +260 °C |
|---|---|
| Operating pressure | Vacuum to 207 kg/cm² (3000 psi) |
| Chemical resistance | pH 0–14, except molten alkali metals and elemental fluorine |
| Stability | Not subject to ageing, can be stored indefinitely, free from contamination |
| Creep | Low — easy to install and fasten, does not deform after assembly |
| Compliance | FDA 21 CFR 177.1550 |
| Thickness | Sealability (ml/hr) | Compression ratio (%) | Elastic resilience (%) | Stress relaxation (%) |
| 0.8 mm | 0.06 | 63.6 | 8.8 | 16.3 |
|---|---|---|---|---|
| 2.0 mm | 0.17 | 63.4 | 9.1 | 37.1 |
| Test standards: ASTM F37B (sealability), ASTM F36 (compression / resilience), ASTM F38 (stress relaxation) | ||||
| Thickness (mm) | Sheet size (mm) |
| 0.5 / 1.0 / 1.5 / 2.0 / 2.5 / 3.0 / 4.0 / 5.0 | 1520 × 1520 |
|---|---|
| 6.0 / 7.0 | 1500 × 1500 |
Other thicknesses and sheet sizes can be produced to order.
