Polyimides
Saint-Gobain Performance Plastics introduced its newest addition to the Meldin® family of high-temperature polyimides, the Meldin 7000 series. Operational temperatures are + 600º F (315º C) for continuous operation, and + 900º F (482º C) for intermittent exposure.

Whereas the Meldin 2000 series polyimides have been handling these high temperatures for over 20 years, the Meldin 7000 series polyimides are unique in that they can be processed by direct-forming, a molding method similar to powdered metalurgy. Using high-pressure mold presses, automatic resin feeding systems and computer-controlled hydraulics, the direct-forming process is able to produce complex parts in an efficient high-volume production method. The ability to produce complex features as-molded reduces and/or eliminates costly secondary machining operations. In addition, tight as-molded tolerances of +/- 0.001" on OD/ID’s are typical.

Available grades include the unfilled 7001 and the 15% graphite-filled grade 7021. The 7001 unfilled grade is an excellent choice for high-temperature structural applications, high-purity semi-conductor applications and electrical insulating welding component applications. The 7021 grade’s self-lubricating properties are ideal for aerospace applications where low weight, dimensionally stable bearings and guideways are desirable.

For more information, contact Marc Savoie, Saint-Gobain Performance Plastics, 386 Metacom Ave., Bristol, RI 02809, 401-253-2000, Web: www.rulon-meldin.com.