CAP vs. PAI
Both CAP and PAI are thermoplastics. There are 14 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 CAP and the bottom bar is PAI.
Metric UnitsUS Customary Units
Mechanical Properties
| Elongation at Break, % | 35 to 50 | |
| 3.0 to 12 |
| Flexural Modulus, GPa | 1.2 to 1.9 | |
| 4.0 to 6.8 |
| Flexural Strength, MPa | 29 to 56 | |
| 160 to 320 |
| Tensile Strength: Ultimate (UTS), MPa | 28 to 45 | |
| 100 to 180 |
Thermal Properties
| Glass Transition Temperature, °C | 190 | |
| 280 |
| Heat Deflection Temperature At 1.82 MPa (264 psi), °C | 65 to 80 | |
| 280 |
| Specific Heat Capacity, J/kg-K | 1480 | |
| 910 to 1000 |
| Thermal Conductivity, W/m-K | 0.25 | |
| 0.26 to 0.53 |
| Thermal Expansion, µm/m-K | 14 | |
| 15 to 34 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.2 | |
| 1.4 to 1.6 |
| Water Absorption After 24 Hours, % | 1.4 to 1.7 | |
| 0.3 to 0.4 |
Common Calculations
| Strength to Weight: Axial, points | 6.5 to 10 | |
| 19 to 34 |
| Strength to Weight: Bending, points | 17 to 23 | |
| 33 to 49 |
| Thermal Diffusivity, mm2/s | 0.14 | |
| 0.16 to 0.41 |