Corona treatment
making plastics printable and bondable
Corona treatment runs high-frequency high voltage between an electrode and a grounded roller, creating a plasma discharge that oxidizes the passing film surface and grafts on polar groups (hydroxyl, carbonyl, carboxyl). This lifts non-polar PP/PE from ~29–32 to 44–50 dyne/cm, sharply improving ink, coating, and adhesive wet-out. Key limit: the effect decays over days to weeks, so treatment is done inline right before printing or coating, not batched and stored; both sides are treated separately, targeting a treated surface energy of at least 38 dyne/cm.
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UV coating flood- or spot-applies a liquid clear coat cured instantly under UV light, with no heat, precise thickness, and very fast drying for high-speed lines.
how the metallic finish is made
tactile relief
Press Run
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