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PEI - Polyetherimide

An amorphous high-performance thermoplastic that offers a unique combination of thermal, mechanical, and electrical properties that remain stable across a vast temperature range.

High-Performance Thermoplastic

We recognize that PEI is a specialized polymer that requires dedicated high-temperature equipment and an uncompromising approach to process control. While many shops avoid PEI due to its high melting point and unforgiving processing window, Manterra has the infrastructure and expertise to execute your most complex high-heat projects.

  • Extreme Heat Resistance: PEI maintains its physical properties and dimensional stability at continuous service temperatures up to 170°C (338°F). It can withstand short-term exposure to even higher temperatures, making it a viable replacement for metal in high-heat environments.
  • Inherent Flame Retardancy: Unlike many other resins that require additives, PEI is naturally flame-retardant (UL94 V-0 rated) with exceptionally low smoke evolution. This makes it a critical material for the aerospace and transportation industries.
  • Outstanding Strength-to-Weight Ratio: PEI offers high tensile strength and stiffness. By utilizing PEI, Manterra helps clients "lightweight" their products by replacing heavy die-cast metal components with high-strength, precision-molded plastic.
  • Chemical & Hydrolytic Stability: It is remarkably resistant to a wide array of chemicals, including most hydrocarbons, alcohols, and dilute acids. Crucially, it retains its strength after repeated steam sterilization cycles, a vital requirement for medical applications.

Molding PEI is an exercise in extreme thermal management. It is a material that demands respect in the barrel and the mold.

  • Aerospace: Interior cabin components, electrical connectors, fuel system parts, and ducting where flame retardancy and low smoke emissions are mandatory.
  • Medical: Surgical instrument handles, sterilization trays, and diagnostic equipment components that must undergo repeated autoclaving.
  • Automotive: High-heat sensors, lamp sockets, under-the-hood electrical housings, and transmission components.
  • Electronics: High-density connectors, printed circuit board components, and telecommunications hardware requiring high dielectric strength.