What is PEI Polyetherimide?

Polyetherimide (PEI) is an amber-colored, high-strength thermoplastic known for its resistance to deformation, particularly under torsional forces. Its excellent mechanical properties and thermal stability make it a cost-effective substitute for small steel components in machinery. PEI can also be reinforced with up to 30% glass fibers, significantly enhancing its rigidity, thermal resistance, and dimensional stability.

Applications of PEI Polyetherimide

Electronics and Electrical Industry

PEI excels in high-voltage applications due to its superior dielectric properties. It is commonly used in:

• Insulators and casings for high-voltage equipment
• Microwave oven components
• Plug sockets and terminal blocks
• Fuses and connectors

Medical Industry

The material’s resistance to gamma radiation and repeat sterilization makes it indispensable for medical applications, such as:

• Instrument handles
• Adapters and probes

Aerospace Industry

PEI’s flame resistance and low smoke emission are critical for aviation components, including:

• Passenger cabin interiors
• Shields and panels

Automotive and Machinery

Its robustness and resistance to extreme temperatures make PEI suitable for:

• Automotive engine covers
• Jet engine components

Key Features of PEI Polyetherimide

Characteristics and Benefits:

• Flame Resistance: Non-flammable with UL 94 V0 classification.
• Dimensional Stability: Minimal thermal expansion ensures reliability in high-precision applications.
• Mechanical Strength: Maintains stiffness and hardness across varying temperatures.
• Excellent Machinability: Suitable for complex designs and easy to thermoform.
• Superior Chemical Resistance: Withstands water, steam, mineral oils, alcohols, and gasoline.

Additional Properties:

• Low smoke emission
• Electrical insulation and dielectric properties
• Resistance to gamma radiation
• Compatible with adhesives and welding processes

Technical Data

• Density: 1.27 g/cm³
• Operating Temperature Range: -50°C to +170°C
• Short-Term Temperature Resistance: Up to +210°C
• Flammability Rating: V0 (UL 94)

PEI Polyetherimide offers a versatile and reliable solution for high-performance applications in electronics, aerospace, medical, and automotive industries. Its exceptional thermal, mechanical, and chemical properties make it an invaluable material for demanding environments.