HDPE vs. PEI
Both HDPE and PEI are thermoplastics. There are 10 material properties with values for both materials. Properties with values for just one material (19, in this case) are not shown.
For each property being compared, the top bar is HDPE and the bottom bar is PEI.
Metric UnitsUS Customary Units
Material Properties
| Density, g/cm3 | 1.0 to 1.3 | |
| 1.3 to 1.5 |
| Elongation at Break, % | 2.5 to 100 | |
| 3.0 to 34 |
| Flexural Modulus, GPa | 4.0 to 7.5 | |
| 3.4 to 5.9 |
| Impact Strength: Notched Izod, J/m | 50 to 260 | |
| 55 to 110 |
| Maximum Temperature: Mechanical, °C | 90 | |
| 170 |
| Specific Heat Capacity, J/kg-K | 1330 to 2400 | |
| 1050 to 1220 |
| Strength to Weight: Axial, points | 6.9 to 17 | |
| 24 to 30 |
| Strength to Weight: Bending, points | 19 to 32 | |
| 40 to 44 |
| Tensile Strength: Ultimate (UTS), MPa | 24 to 80 | |
| 110 to 160 |
| Water Absorption At Saturation, % | 0.1 to 0.3 | |
| 0.9 to 1.3 |