PEI
PEI (polyetherimide) [Ultem®]
Properties
- Non-crystalline thermoplastic resin
- Can be extruded, thermoformed, extrusion blow-molded and injection-molded
- Heat-resistant
- High strength and stiffness
- Chemical-resistant
- Available in transparent and opaque custom colors and glass-filled grades
- Copolymers available for more rugged conditions
- Natural grade is FDS-, NSF-, and USP Class VI-compliant
- Low smoke-generating
- Flame-resistant
Common uses
- Many applications in medical, electronic/electrical, microwave, automotive and aircraft industries
Ultem
Material Specifications
| ASTM or UL test | Property | Value |
Physical |
||
| D792 | Density (g/cm3) | 1.27 |
| D570 | Water absorption, 24 hrs (%) | 0.25 |
Mechanical |
||
| D638 | Tensile strength (psi) | 15,200 |
| D638 | Tensile modulus | - |
| D638 | Tensile elongation at break (%) | 60 |
| D790 | Flexural strength (psi) | 22,000 |
| D790 | Flexural modulus (psi) | 480,000 |
| D785 | Hardness, Rockwell | 109 |
| D256 | Izod notched impact (ft-lb/in) | 1.0 |
Thermal |
||
| D3418 | Melting temp (F°) | 426 |
| D696 | Coefficient of linear thermal expansion (x 10–5 in./in./°F) |
31 |
| D648 | Heat deflection temp (F°/C°) at 264 psi | 410 |
| - | Max operating temp (F°) | - |
| C177 | Thermal conductivity (BTU-in/ft²-hr-°F) |
1.53 – |
| UL94 | Flammability rating | V-O |
Electrical |
||
| D150 | Dielectric constant at 1 KHz | 3.15 |
| D150 | Dissipation factor at 1 KHz | 0.0013 |
| D149 | Dielectric strength (V/mil) short time, & ½” thick |
- |
| D257 | Volume resistivity (ohm/cm) at 50% RH | 1.0 x 1017 |
These are typical values for reference and comparison only. They should not be used as a basis for design specifications or quality control. Contact us for the manufacturers’ complete material property datasheets. All values were taken at 73°F (23°C) unless otherwise noted.
Don’t see what you’re looking for? Call us at 800–423-2769 or email us at tom@crownplasticsinc.com.
