PEI (Polyetherimid)

PEI is an amorphous, high temperature material with relatively low cost compared to other high temperature materials. It has excellent elongation and Impact Strength, and can be molded to tight tolerances. Its chemical resistance is not as good as crystalline materials but is excellent for an amorphous material. PEI behaves similar to polycarbonate, but can perform at higher temperatures.

Applications: Commercial aircraft interiors, healthcare products, cooking utensils, fiber optics, electrical and electronic applications.

Advantage

 

High heat resistance
Exceptional strength and impact modulus
High dielectric strength
Broad chemical resistance
Biocompatible
Excellent machinability and finishing characteristic
Outstanding processability on conventional molding equipment
Flame resistance with low smoke evolution

Disadvantage

 

Translucent and opaque-clear is not available
High cost
Notch sensitive
High processing temps required

Tensile StrengthFlexural ModulusImpact StrengthMax Temp.Chemical Resistance
14,000-28,000 psi480,000-1,300,000 psi2 ft-lb/in notched izod375°-420° FFair to Good