PTFE (Teflon): Ultimate Chemical Widerstand und Niedrig-Friction Polymer
ASTM D4894 · Published: 2026-06-03 · Updated: July 2026
PTFE (polytetrafluoroethylene) has the lowest coefficient of friction (0.04) of any solid material and near-universal chemical resistance — attacked only by molten alkali metals and elemental fluorine at elevated temperature. It cannot be...
PTFE (polytetrafluoroethylene) hat der lowest coefficient von friction (0.04) von any fest material und near-universal chemical widerstand — attacked nur durch molten alkali metals und elemental fluorine bei elevated temperature. Es cannot sein injection molded due zu sein ultra-hoch melt viscosity (10¹¹ Pa·s) und müssen sein processed durch compression molding und sintering, similar zu powder metallurgy.
Quick Facts
| Kategorie | Thermoplastics |
| Norm | ASTM D4894 |
| Density | 2.20 g/cm³ |
| Yield Strength | N/A (cold flows under load) |
| Tensile Strength | 25 MPa |
Global Equivalents & Cross-Reference
| Alternative Standard / Grade | Action |
|---|---|
| Chemours Teflon | Compare |
| Dyneon PTFE | Compare |
| Daikin Polyflon | Compare |
Verwandt Materials
🧮 Material Weight Calculator
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Frequently Asked Questions
Warum können't PTFE sein injection molded?
PTFE's melt viscosity bei 380°C exceeds 10¹¹ Pa·s — approximately 100 million times higher als PEEK bei der gleich temperature. Even über sein melting point (327°C), PTFE remains ein gel-wie fest. Es müssen sein processed durch kalt compression molding von powder followed durch sintering bei 370-380°C.
References & International Standards
- ASTM International. Norm Specifications für Stahl & Metal Alloys. astm.org
- International Organization für Standardization (ISO). Metallic Materials — Cross-Referenz Database. iso.org
- American Iron und Stahl Institute (AISI). Stahl Güte Designations & Equivalents. steel.org
- European Committee für Standardization (CEN). EN Stahl Standards & Numbering System. cencenelec.eu