Adhesion Loss,Plastic Parts

Description :Loss of adhesion of the refinish system and a plastic
part substrate. This defect is often noticed some time after the painting took place.

  • ORIGIN AND POTENTIAL CAUSES

    » Improper cleaning, drying (tempering) or preparation - failure to remove mold-release agents
    » Improper treatment
    » Wrong identification of substrate
    » Failure to use proper sealer/primer
    » Failure to use proper/recommended
    topcoat system
    » Clean and degrease the plastic part properly.

  • PREVENTION TECHNIQUES

    » Identify the type of plastic substrate and follow recommended paint system
    for that specific type of substrate

    » Thoroughly clean substrate to be painted using recommended system

    » Use recommended sealer/primer using the correct mixing ratio of recommended
    activator, flexible additive and thinner

    » Apply sealer/primer to recommended
    film build using recommended viscosity

    » Use topcoat as recommended for type
    of plastic substrate to be painted

    » Where recommended, use a suitable adhesion primer for the type of plastic substrate being finished

  • REMEDY

    » Remove all finish layers from the substrate

    » Refinish using recommended paint system and preparation for type of plastic substrate to be painted

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