PEI – Polyetherimide Applications

Polyetherimide (abbreviate PEI) is an amorphous, amber-to-transparent thermoplastic polyimide with characteristics similar to the related plastic PEEK. Relative to PEEK, PEI is cheaper, but less temperature-resistant and lower in impact strength. PEI has a high dielectric strength, natural flame resistance, and extremely low smoke generation. PEI has excellent mechanical properties and performs in continuous use to 340°F (170°C).

Benefits & Liabilities of PEI

Benefits

• Continuous use temperature to 180 Deg. C
• Inherent flame retardancy
• Excellent dimensional stability
• Excellent mechanical properties at elevated temperatures
• Good UV resistance
• Transparent to visible, infrared and microwave radiation
• FDA compliant

Liabilities

• Very High cost
• Not suitable for use with chlorinated solvents
• Must be dried before processing
• Low colorability