WEB EXCLUSIVE: “Unprecedented heat resistance” and “exceptional dimensional stability for thin-wall molding” are claimed for a new amorphous thermoplastic polyimide (TPI) blend from SABIC Innovative Plastics, Pittsfield, Mass. Extem UH 1019 resin is said to be the first unfilled thermoplastic to achieve a UL 746B continuous-use temperature rating of 260 C (500 F). Although semicrystalline PEEK offers similar heat resistance, its mechanical properties may ot withstand such high continuus-use temperatures, according to SABIC. Extem UH 1019 reportedly provides eight times greater stiffness and lower creep than PEEK, as well as extremely low thermal expansion. Extem resins are flame retardant without halogenated additives. Potential applications include wire/cable insulation, specialty connectors, semiconductor plasma chamber components, high-heat films, membranes, bearing cages, and gears.