PEI (Polyetherimide)

PEI is a high-performance amorphous thermoplastic offering exceptional heat resistance, flame retardancy, and dimensional stability. It excels in demanding applications requiring high strength and thermal performance.

PEI (Polyetherimide)

PEI (Polyetherimide) Material Properties

Mechanical Properties

  • Very high strength and rigidity
  • Excellent dimensional stability
  • Good creep resistance
  • High fatigue strength
  • Low wear rate
  • Outstanding toughness

PEI (Polyetherimide) Thermal Properties

  • Heat deflection temperature: 200°C
  • Continuous use temperature: 170°C
  • Excellent flame resistance
  • Low thermal expansion
  • Self-extinguishing properties

PEI (Polyetherimide) Processing Properties

  • Good processability
  • High melt strength
  • Moderate shrinkage
  • Good flow properties
  • Suitable for complex parts
  • Multiple processing methods

PEI (Polyetherimide) Parts Manufacturing Processes

Injection Molding

Excellent

Advantages

  • High temperature resistance
  • Excellent mechanical properties
  • Good dimensional stability
  • Complex shapes possible

Key Parameters

melt temperature: 350-400°C
mold temperature: 140-170°C
injection pressure: 100-140 MPa

CNC Machining

Very Good

Advantages

  • High precision
  • Good surface finish
  • No internal stress
  • Complex geometries

Key Parameters

cutting speed: 150-250 m/min
feed rate: 0.05-0.15 mm/rev
tool type: Carbide tools

3D Printing

Good

Advantages

  • High temperature resistance
  • Strong parts
  • Complex geometries
  • Functional prototypes

Key Parameters

nozzle temperature: 350-380°C
bed temperature: 130-150°C
layer height: 0.1-0.2mm

PEI (Polyetherimide) Technical Specifications

density

1.27 g/cm³

water absorption

0.25%

tensile strength

105 MPa

flexural modulus

3300 MPa

impact strength

85 J/m

heat deflection

200°C

dielectric strength

22 kV/mm

flame rating

V-0 (UL94)

Processing Guidelines

molding temperature

350-400°C

mold temperature

140-170°C

drying conditions

150°C for 4-6 hours

injection pressure

100-140 MPa

recommended thickness

1.0-4.0 mm

PEI (Polyetherimide) Parts Industry Applications

Aerospace

  • Interior components
  • Structural parts
  • Electrical housings
  • Ducting components

Medical

  • Sterilizable equipment
  • Surgical tools
  • Medical device housings
  • Laboratory equipment

Industrial

  • High-temperature components
  • Chemical processing parts
  • Electrical insulators
  • Precision components

Ready to Start Your Project?

Contact our team to discuss your PEI (Polyetherimide) manufacturing needs