Thermoplastic comparison
Polyethylene, high-density (HDPE) vs PTFE (Teflon)
Every value below is a typical room-temperature figure with its source, test method and conditions — the same dataset that drives the calculators.
| Property | Polyethylene, high-density (HDPE) | PTFE (Teflon) | Difference |
|---|---|---|---|
| Density | 0.95 g/cm³ | 2.17 g/cm³ | PTFE (Teflon) — 2.3× higher |
| Young's modulus E | 1 GPa | 0.5 GPa | Polyethylene, high-density (HDPE) — 2.0× higher |
| Tensile strength | 27 MPa | 24 MPa | Polyethylene, high-density (HDPE) — 13% higher |
| Melting point Tm | 131 °C | 327 °C | PTFE (Teflon) — 196 °C higher |
Where these numbers come from
- Callister & Rethwisch, Materials Science and Engineering, 10th ed.
Typical room-temperature values for learning and preliminary design; grades vary widely and a supplier datasheet always overrides a textbook figure. Confirm against the datasheet before design work.