TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The homopolymer is polyamide (PA), thermoplastic polyurethane, polyester (preferably polyethylene terephthalate), polyoxymethylene, polyphenyloxide, polyphenylsulfide, polyimide or polybutylene terephthalate. The copolymer is PA66/6 or polypropylene-copolymers, preferably PA6/12, PA66/6, PA66/610 or PA12/6/66, where PA66/6-copolymers comprise all copolymers, in which the polyamide is polymerized by the simultaneous polycondensation of PA66 and PA6 blocks, where the amount of PA66-blocks is 10-80 (preferably 25-35) wt.%. The polymer blends comprise (a) mixture of polycarbonate, polypropylene, polybutylene terephthalate and polyethylene terephthalate with elastomer with elastomeric tough-modified phase, which is compounded by reactive extrusion, and (b) mixture (blends or polymer alloys) of at least one polyamide with at least one other polyamide, preferably PA6/PA66-blends, with 10-40% PA66, preferably 25-35%, or PA6/PA66/PA12-triblends or PA6/PA1010-blends, or PA6/PA12-blends or PA1010/PA12-blends. The homopolymer and/or copolymer comprise: at least one elastomerically modified polyamide, or a block-copolymer; a mixture of at least one polyamide with at least one further polymer, preferably a mixture of PA with polyolefins, preferably PA/polyethylene blends, mixture of PA6, PA12 and/or PA66 with polyphenylether, PA/ABS blends, PA/polyphenylenesulfide blends or PA6/PET blends; and polycarbonate-polymer blends, preferably polycarbonate/acrylonitrile-butadiene-styrene blends, polycarbonate/polyethylene blends, polycarbonate/polyethylene terephthalate blends or polycarbonate/polysulfide blends. The frame elements are non conductors or only a poor electrical conductor, and have a specific resistance of more than 1 Omega m (at 20 degrees C), preferably more than 1020 Omega m (at 20 degrees C). The frame elements are good or very good heat conductor, and have a thermal conductivity of greater than 0.1 W/(mK), preferably greater than 1 W/(m K). The frame elements have heat deflection temperature according to method-B value of 50-200 degrees C, preferably 80-200 degrees C (ISO 75). The frame member is modified with an elastomer and therefore at least slightly elastic, where in step (ii), the agents for elastomeric modifiers are added to the homopolymer and/or the copolymer.