PEI vs. NEMA Laminate
PEI belongs to the thermoplastics classification, while NEMA laminate belongs to the thermoset plastics. There are 13 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.
For each property being compared, the top bar is PEI and the bottom bar is NEMA laminate.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 140 to 180 | |
| 190 to 360 |
| Flexural Modulus, GPa | 3.4 to 5.9 | |
| 6.4 to 18 |
| Flexural Strength, MPa | 140 to 210 | |
| 87 to 340 |
| Impact Strength: Notched Izod, J/m | 55 to 110 | |
| 20 to 430 |
| Rockwell M Hardness | 110 to 130 | |
| 100 to 120 |
| Tensile Strength: Ultimate (UTS), MPa | 110 to 160 | |
| 55 to 260 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 170 | |
| 120 to 200 |
| Thermal Expansion, µm/m-K | 20 to 53 | |
| 9.0 to 20 |
Electrical Properties
| Dielectric Strength (Breakdown Potential), kV/mm | 30 to 33 | |
| 12 to 21 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.3 to 1.5 | |
| 1.3 to 1.9 |
| Water Absorption After 24 Hours, % | 0.17 to 0.25 | |
| 0.17 to 3.5 |
Common Calculations
| Strength to Weight: Axial, points | 24 to 30 | |
| 8.3 to 40 |
| Strength to Weight: Bending, points | 40 to 44 | |
| 17 to 50 |