Ultem® is a brand name for polyetherimide (PEI), an amorphous, amber-to-transparent thermoplastic with characteristics similar to the related plastic PEEK. Relative to PEEK, PEI is less expensive, but is lower in impact strength and usable temperature. Other trade names for polyetherimide include SUSTAPEI and TECAPEI™.
| Ultem 1000 | Ultem 1000 | Ultem 2300 | Ultem 2300 | Semitron ESD410 | |||
| Mechanical | ASTM Test Method | Extruded Polyetherimide | Injection Molded Polyetherimide | Extruded 30% Glass-filled Polyetherimide | Injection Molded 30% GF Polyetherimide | Static Dissapative Polyetherimide | Units |
|---|---|---|---|---|---|---|---|
| Strength to Weight Ratio | - | - | - | - | - | - | ksi |
| Specific Gravity @73 F | D792 | 1.28 | 1.27 | 1.51 | 1.51 | 1.41 | - |
| Tensile Strength @73 F, (ult)/(yld) | D638 | 16,500 (ult) | 15,200 (yld) | 17,000 (ult) | 24,500 (yld) | 9,000 | psi |
| Tensile Modulus of Elasticity @73 F | D638 | 475,000 | - | 800,000 | 1,260,000 | 850,000 | psi |
| Tensile Elongation at Break @73 F | D638 | 80 | 7 | 3 | 3 | 2 | % |
| Flexural Strength @73 F | D790 | 20,000 | 22,000 | 30,000 | 33,000 | 12,000 | psi |
| Flexural Modulus of Elasticity @73 F | D790 | 500,000 | 480,000 | 900,000 | 1,300,000 | 850,000 | psi |
| Shear Strength @73 F | D732 | 15,000 | 15,000 | - | 14,000 | - | psi |
| Comprehensive Strength, (% Deformation) @73 F | D695 | 22,000 (10) | 21,900 (10) | 32,000 (10) | 30,700 (10) | 19,500 (10) | psi |
| Comprehensive Modulus of Elasticity @73 F | D695 | 480,000 | 480,000 | 625,000 | 938,000 | 600,000 | psi |
| Hardness, Rockwell, Scale as noted @73 F | D785 | M112 (R125) | M109 | M114 (R127) | M114 | M115 (R125) | - |
| Hardness, Durometer, Shore D @73 F | - | D86 | - | D86 | - | D85 | - |
| Izod Impact, (Notched) @73 F | D256 Type A | 0.5 | 1.0 | 1.0 | 2.0 | 0.8 | ft-lb/in of notch |
| Coefficient of Friction, (Dry vs Steel) Dynamic | - | 0.42 | - | - | - | 0.18 | - |
| Limiting PV, (with 4 to 1 factor of safety applied) | - | 1,875 | - | - | - | 12,000 | psi-ft/min |
| Thermal | ASTM Test Method | Extruded Polyetherimide | Injection Molded Polyetherimide | Extruded 30% Glass-filled Polyetherimide | Injection Molded 30% GF Polyetherimide | Static Dissapative Polyetherimide | Units |
|---|---|---|---|---|---|---|---|
| Coefficient of Linear Thermal Expansion @73 F | E-831 (TMA) | 3.1 E-05 | 3.1 E-05 | 1.1 E-05 | 1.1 E-05 | 1.8 E-05 | in/in/F |
| Heat Deflection Temperature @264 psi | D648 | 392 | 392 | 410 | 410 | 410 | F |
| Tg-Glass transition termperature, (Amorphous) | D3418 | 419 | - | 419 | - | 428 | F |
| Melting Point, (VS=Vicat Softening Temp.) | D3418 | - | - | - | 442 (VS) | - | F |
| Continuous Service Temperature in Air, (Max.) | - | 340 | 340 | 340 | 340 | 338 | F |
| Thermal Conductivity | - | 0.90 | 0.22 W/M-C | 1.15 | - | - | BTU-in/hr-ft2-F |
| Electric | ASTM Test Method | Extruded Polyetherimide | Injection Molded Polyetherimide | Extruded 30% Glass-filled Polyetherimide | Injection Molded 30% GF Polyetherimide | Static Dissapative Polyetherimide | Units |
|---|---|---|---|---|---|---|---|
| Dielectric Strength, Short Term | D149 | 830 | 830 | 770 | 770 | - | Volts/mil |
| Volume Resistivity | D257 | 6.7 E+17 | 1.0 E+17 | 3.0 E+16 | 3.0 E+16 | 1E5 - 1E7 | ohm-cm |
| Dielectric Constant @10E6 Hz | D150 | 3.2 | - | 3.7 | - | - | - |
| Dissipation Factor @10E6 Hz | D150 | 0.001 | - | 0.002 | - | - | - |
| Flammability @3.1 mm unless noted | UL94 | V-0 | 5VA (1.9mm) | V-0 | V-0 (0.25mm) | V-0 | - |
| H2O | ASTM Test Method | Extruded Polyetherimide | Injection Molded Polyetherimide | Extruded 30% Glass-filled Polyetherimide | Injection Molded 30% GF Polyetherimide | Static Dissapative Polyetherimide | Units |
|---|---|---|---|---|---|---|---|
| Water Absorption, Immersion, 24 hours | D570(7) | 0.25 | 0.25 | 0.18 | 0.16 | 0.30 | % by weight |
| Water Absorption, Saturation | D570(7) | 1.25 | 1.25 | 0.90 | 0.90 | 1.25 | % by weight |