Due to its toughness and ductility, polypropylene (PP) is uniquely suited for a fastening and joining concept that can't easily be reproduced with other engineering thermoplastics: the integrator living hinge. Molded-in hinges aren't new, but designers under the gun to consolidate parts and eliminate assembly steps are taking a closer look at molded-in hinges for everything from glove-box bins and tackle boxes to CD cases and electrical connectors.
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