The plastics business with its extensive list of polymers including Ultem PEI, a material unique to GE, was later acquired by SABIC Plastics. PEEK (Polyetheretherketone) is a semi-crystalline, thermoplastic high-performance material, and is characterized mainly by its very good mechanical properties and exceptional dimensional stability, even at high continuous operating temperatures of up to 250C. General Electric Company’s Plastics Division developed and commercialized polyetherimide in 1982 under the Ultem™PEI tradename.
Its chemical resistance is similar to PPS (polyphenylene. The proliferation of PEI grades since its introduction include several with different glass fiber reinforcement levels that increase the high-performance thermoplastic’s structural strength. PEEK is one of the highest performance thermoplastics, surpassed only by Solvays Torlon PAI. PEI is also recognized for its retention of properties after extended exposure to steam and hot water, a benefit for food processing equipment and medical applications that require aggressive cleaning or sterilization. Its performance is characterized by a high strength-to-weight ratio with strength retention up to 390☏ (200☌), long term resistance to thermal oxidation, good electrical properties and inherent chemical and flame resistance. In its basic form, polyetherimide is transparent amber. This modification allows PEI to be melt processed by injection molding and extrusion, a limitation of traditional polyimide materials such as Vespel® PI. PEEK (Polyether ether ketone) is a colourless organic thermoplastic polymer used in engineering applications such as aircraft, automotive, semiconductor, medical, and oil and gas. The material PEEK is a unique, versatile, semi-crystalline engineering thermoplastic with excellent chemical resistance. An amorphous thermoplastic, PEI’s polymeric structure includes ether (E) linkages to the polyimide (PI) molecular structure. PEEK plastic material - Polyetheretherketone. Polyetherimide (PEI) is a member of the polyimide family of high-performance materials that also includes polyamide imide (PAI).
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