EVA vs. PBI
EVA belongs to the thermoplastics classification, while PBI belongs to the thermoset plastics. There are 14 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.
For each property being compared, the top bar is EVA and the bottom bar is PBI.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 0.015 to 0.080 | |
| 5.9 |
| Elongation at Break, % | 300 to 800 | |
| 3.0 |
| Tensile Strength: Ultimate (UTS), MPa | 3.0 to 35 | |
| 160 |
Thermal Properties
| Maximum Temperature: Decomposition, °C | 450 | |
| 590 |
| Specific Heat Capacity, J/kg-K | 1400 | |
| 930 |
| Thermal Conductivity, W/m-K | 0.34 | |
| 0.41 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 Hz | 2.8 | |
| 3.4 |
| Dielectric Strength (Breakdown Potential), kV/mm | 21 | |
| 23 |
Otherwise Unclassified Properties
| Density, g/cm3 | 0.93 to 1.0 | |
| 1.3 |
Common Calculations
| Stiffness to Weight: Axial, points | 0.0087 to 0.048 | |
| 2.5 |
| Stiffness to Weight: Bending, points | 8.6 to 15 | |
| 46 |
| Strength to Weight: Axial, points | 0.87 to 10 | |
| 34 |
| Strength to Weight: Bending, points | 4.8 to 26 | |
| 50 |
| Thermal Diffusivity, mm2/s | 0.25 to 0.26 | |
| 0.34 |