Polyetherimide PEI
Polyetherimide (PEI) is a high-performance engineering plastic known for its exceptional mechanical strength, dimensional stability, and balanced chemical and thermal properties. Suitable for use at temperatures up to +170°C, PEI is ideal for various industrial applications where durability and performance are critical.
What is Polyetherimide?
Polyetherimide (PEI) is a robust engineering plastic that offers excellent mechanical strength, rigidity, and stability under high temperatures. Its resistance to deformation, especially under rotational forces, makes it a cost-effective alternative to small machined steel parts. PEI can be enhanced with up to 30% glass fiber, increasing its hardness, rigidity, and thermal stability.
Key Features of Polyetherimide (PEI)
- Fire Resistance: Non-flammable and flueless, ensuring safety in high-temperature environments.
- Mechanical Strength: Maintains rigidity and hardness across a range of temperatures.
- Dimensional Stability: Low thermal expansion coefficient ensures stability even at high temperatures.
- Workability: Easy to machine, form by heat treatment, weld, and bond.
- Electrical Insulation: Excellent electro-insulation and dielectric properties.
- Radiation Resistance: Resistant to gamma radiation.
- Chemical Resistance: High resistance to water, steam, mineral oils, petrol, and alcohol.
- Sterilization Resistant: Withstands multiple sterilizations.
- Color Options: Available in yellowish (amber) for standard PEI and grey/black for glass fiber-reinforced PEI.
Applications
Polyetherimide (PEI) is widely used in various industries due to its versatile properties:
- Electronics and Electrical: High voltage housings, insulators, microwave oven parts, plug-in adapters, terminals, and fuses.
- Medical Industry: Adapters, instrument handles, and probes that require frequent sterilization.
- Aviation: Interior finishing for passenger cabins and panels.
- Automotive: Components for vehicle hoods and jet engines.
Technical Specifications
- Density: 1.27 g/cm³
- Operating Temperature: -50°C to +170°C
- Short-term Operating Temperature: Up to +210°C
- Fire Class Rating: V0 (UL 94)
- Color Options: Amber for standard PEI, grey/black for glass fiber-reinforced PEI
Dimensions
| Thickness (mm) | Width (mm) | Length (mm) | Diameter, Ø (mm) | |
| Sheets | 10 – 60 | 620 | 3 000 | – |
| Rods | – | – | 1 220; 2 440 | 20 – 100 |
Note: PEI plastic is not warehoused and is delivered only on special orders.
Discover More
Polyetherimide (PEI) is a crucial material for high-performance applications requiring exceptional thermal stability, mechanical strength, and chemical resistance.
Looking for additional materials? Explore our technical plastics catalog to discover a wider range of products tailored to your needs.
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