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ULTEMTM high performance films are created from GE Advanced Materials ULTEMTM resin technology. ULTEMTM Polyetherimide resin, PEI, is an amorphous high performance polymer, which is characterized by excellent thermal properties, good chemical resistance, and exceptional dimensional stability.

The combination of high temperature resistance, low moisture absorption, and excellent dielectric properties may make ULTEMTM film an excellent candidate for a broad range of electronics applications. All of the ULTEMTM film products are un-oriented films; the properties of the film are obtained from the resin utilized, not from secondary operations. ULTEMTM films utilize three different ULTEMTM resin technologies to offer a range of performance attributes.

insulation pieces made by Dr. D. Müller GmbH
Key properties of ULTEMTM films:
  • HIGH HEAT RESISTANCE exhibiting a glass transition temperature (Tg) from 217°C to 245°C
  • LOW MOISTURE ABSORPTION (up to 1.2% maximum absorption)
  • GOOD DIELECTRIC STRENGTH compared to polyimide films
  • LOW DIELECTRIC CONSTANT (up to 3.0 @ 10 GHz) and dissipation factor over a wide range of temperatures and frequencies
  • FLAME RETARDANT to meet UL 94 VTM-0 performance requirements
  • GOOD RESISTANCE to a broad range of chemicals, such as fully halogenated hydrocarbons, alcohols, and aqueous solutions
  • HEAT SEALABLE, capability to seal to itself and a variety of other materials
  • HIGH METAL ADHESION, with sputtered copper and heat fused copper