PEI polyetherimide applications: automotive industry (engine accessories such as temperature sensors, fuel and air handlers, etc.), electrical and electronic equipment (electrical couplings, printed circuit boards, chip housings, explosion-proof boxes, etc.), product packaging, Aircraft interior equipment, the pharmaceutical industry (surgical instruments, tool housings, non-implanted devices).
Injection molding process conditions:
Drying treatment: PEI has hygroscopic properties and can lead to material degradation. The required humidity value should be less than 0.02%. Drying conditions of 150 C for 4 hours are recommended.
Melting temperature: 340~400C for common type materials and 340~415C for enhanced type materials.
Mold temperature: 107~175C, the recommended mold temperature is 140C. Injection pressure: 700~1500bar.
Injection speed: Use the highest possible injection speed.
Chemical and physical properties: PEI has a very high temperature stability, even for non-reinforced PEI, still has good toughness and strength. Therefore, the superior thermal stability of PEI can be used to fabricate high temperature heat resistant devices.
PEI also has good flame retardancy, chemical resistance and electrical insulation properties. The glass transition temperature is very high, reaching 215C. PEI also has a very low shrinkage (typically between 0.4% and 0.7%) and good isotropic mechanical properties.
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