High performance polyimide polymers have increasingly replaced metal parts in off-road and automotive equipment. Known for excellent properties at high temperature, load and speed, polyimides have proven their effectiveness in sealing and bearing applications. Their inherent strength allows polyimides to operate as bearings at very high pressure - velocity (PV) factors. Non-lubricated bearing test data on polytetrafluoroethylene (PTFE) modified polyimides indicate a PV capability of over 120000 psi-fpm. Lubricated tests have been conducted successfully on transmission sealing rings at PV's in excess of 1000000 psi-fpm. Low wear rates result in extended operational life for polyimide components and due to the low coefficient of friction of PTFE and graphite modified compounds, polyimide parts continue to operate satisfactorily during temporary loss of lubrication. By taking advantage of polyimide's strength, low deformation under load, low wear rate, self-lubricity and chemical and temperature resistance, the design engineer is able to optimize part and assembly design. Improved performance, weight reduction, and cost savings may be realized. (Wassmann)


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    Title :

    Designing with high performance plastics in off-the-road and automotive equipment applications


    Additional title:

    Konstruieren mit Hochleistungskunststoffen bei Gelaendefahrzeugen und im Automobilbau


    Contributors:

    Published in:

    Publication date :

    1981


    Size :

    7 Seiten, 9 Bilder, 4 Tabellen, 2 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English







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