Polyetherimide (Ultem®)
PEI is an amorphous high-performance thermoplastic combining excellent mechanical properties with outstanding flame resistance and thermal stability. FDA compliant grades available for food and medical applications.
PEI (commonly known as Ultem®) is an amorphous thermoplastic with an exceptional balance of thermal, mechanical, and electrical properties. Its amber transparency and inherent flame resistance make it unique among high-performance plastics.
PEI maintains its properties across a wide temperature range and offers excellent hydrolytic stability, making it suitable for repeated steam sterilization in medical applications.
| Density | 1.27 g/cm³ |
| Tensile Strength | 105 MPa |
| Flexural Modulus | 3,300 MPa |
| Operating Temperature | -40°C to +200°C |
| Glass Transition (Tg) | 217°C |
| Water Absorption | 0.25% (24h) |
| Dielectric Strength | 28 kV/mm |
| Flammability | UL94 V-0 |
PEI's combination of thermal resistance, flame retardancy, and FDA compliance makes it essential for aerospace, medical, and food processing industries.
Interior components, ducting, and brackets meeting FAR 25.853 flammability requirements.
Surgical instruments, sterilization trays, and reusable components requiring autoclave resistance.
FDA-compliant components for hot-fill, microwave, and steam sterilization applications.
Connectors, burn-in sockets, and insulators in high-temperature electronic assemblies.
Under-hood sensors, reflectors, and throttle body components.
Valve bodies, manifolds, and flow meters for hot water and chemical systems.
We supply PEI in unfilled, glass-reinforced, and specialty grades including FDA and aircraft-certified materials.
Get a quote for sheets, rods, tubes, or custom-machined components.