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  1. Rosej3570

    Vacuum molding polypropylene over polyurethane foam

    I am working on a project that a mold is machined out of polyurethane foam. Polypropylene sheet is then vacuum molded over the polyurethane foam mold. Unfortunately, the polypropylene and polyurethane seem to bond slightly, as the surface of the PP becomes ruffed up like the PU Foam surface...

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