Materials / Compare
FDM PAHT-CF vs. Rubber
Compare FDM PAHT-CF vs. Rubber strength, stiffness, weight and thermal properties.
| Try it on a partA bracket to run stress or thermal on, free in your browser | Open in LessCAD | Open in LessCAD |
|---|---|---|
| Mechanical | ||
| Yield strength | not given (tensile used) | not given (tensile used) |
| Ultimate tensile strength | 92MPasourcetypical4x stronger | 23MPasourcetypical |
| Flexural strength | 125MPasourcetypical | not sourced |
| Elongation at break | 8.4%sourcetypical | 830%sourcetypical98.8x more ductile |
| Young's modulus (stiffness) | 3.86GPasourcetypical | not sourced |
| Density | 1,060kg/m³sourcetypical | 960kg/m³sourcetypical (specific gravity) |
| Strength to weight | 86.8kN·m/kg3.62x higher | 24kN·m/kg |
| Stiffness to weight | 3.64MN·m/kg | not sourced |
| Poisson's ratio | not sourced | 0.5sourcegovernment (NBS J. Res. 68A, 1964): computed by NBS for peroxide-cured gum NR vulcanizate, 25 °C, infinitesimal deformation0.49 in the solver: the linear element locks as the ratio nears 0.5 (nearly incompressible). |
| Shear modulus | not sourced | not sourced |
| Bulk modulus | not sourced | not sourced |
| Speed of sound | 1,908m/s | not sourced |
| Thermal | ||
| Thermal conductivity | not sourced | 0.151W/m·Ksourcegovernment selected value (US Army Natick Laboratories TR 66-49-PR, 1966), soft vulcanized natural rubber, 25 °C |
| Thermal expansion | not sourced | not sourced |
| 100 mm part over a 50 °C swing | not sourced | not sourced |
| Specific heat | not sourced | 1,881J/kg·Ksourcegovernment (NBS J. Res. 68A, Table 7; values observed for unvulcanized NR by Bekkedahl and Matheson), 25 °C |
| Heats up and cools (diffusivity) | not sourced | 0.0836mm²/s |
| Thermal shock resistance | not sourced | not sourced |
| Melting point | 225°Csourcetypical | not sourced |
| Glass transition | 70°Csourcetypical | not sourced |
| Max service temperature | 170°CsourceHDT 1.8 MPa | 70°Csourcecontinuous use operating range |
| Values for | Bambu Lab PAHT-CF, TDS V3.0, printed specimens X-Y, dry state; nozzle 290 °C, bed 100 °C, 100 mm/s, 100% infill; annealed and dried 80 °C for 12 h before testing. | Weir Minerals Linatex Premium rubber (95 % natural rubber), typical physical properties, spec sheet WMD0118/202305 |
Every value links to the document that states it. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
FDM PAHT-CF is 3D printed: its properties depend on build direction and print settings; these are typical values.
Questions
Is FDM PAHT-CF stronger than Rubber?
FDM PAHT-CF is stronger: its tensile strength is 92 MPa against 23 MPa for Rubber (4x).
Which is lighter, FDM PAHT-CF or Rubber?
Rubber is lighter: 960 kg/m³ against 1,060 kg/m³ for FDM PAHT-CF.
Which is lighter for the same job, FDM PAHT-CF or Rubber?
For the same stiffness or strength: FDM PAHT-CF is lighter for a strong rod or tie, strong beam, strong panel or plate.
| Part that must be | FDM PAHT-CF | Rubber |
|---|---|---|
| Strong rod or tie | lighter | 3.62x heavier |
| Strong beam | lighter | 2.28x heavier |
| Strong panel or plate | lighter | 1.81x heavier |
For the same stiffness or strength, mass scales with density over stiffness (or strength) raised to a power set by how the part is loaded: 1 for a rod in tension, 1/2 for a beam in bending, 1/3 for a panel (the standard material-selection indices).
Which is more ductile, FDM PAHT-CF or Rubber?
Rubber stretches further before it breaks: 830% elongation at break against 8.4% for FDM PAHT-CF.