PEI vs. UHMW-PE
Both PEI and UHMW-PE are thermoplastics. There are 13 material properties with values for both materials. Properties with values for just one material (21, in this case) are not shown.
For each property being compared, the top bar is PEI and the bottom bar is UHMW-PE.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 3.4 to 5.6 | |
| 0.8 |
| Elongation at Break, % | 3.0 to 34 | |
| 400 |
| Tensile Strength: Ultimate (UTS), MPa | 110 to 160 | |
| 49 |
Thermal Properties
| Specific Heat Capacity, J/kg-K | 1050 to 1220 | |
| 1750 |
| Thermal Conductivity, W/m-K | 0.18 to 0.23 | |
| 0.41 |
| Thermal Expansion, µm/m-K | 20 to 53 | |
| 180 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.3 to 1.5 | |
| 0.94 |
Common Calculations
| Stiffness to Weight: Axial, points | 1.5 to 2.1 | |
| 0.47 |
| Stiffness to Weight: Bending, points | 39 | |
| 33 |
| Strength to Weight: Axial, points | 24 to 30 | |
| 14 |
| Strength to Weight: Bending, points | 40 to 44 | |
| 32 |
| Thermal Diffusivity, mm2/s | 0.11 to 0.14 | |
| 0.25 |
| Thermal Shock Resistance, points | 44 to 100 | |
| 25 |