Effect of the Electrical Conductivities of Corona Discharge Ground Rolls on Surface Treatment, 2016 PLACE Conference

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Corona treatment surface modification utilizes a corona discharge (air plasma) to change the surface properties of low polarity materials to improve surface wettability and adhesion.  This air-based discharge is generated by the application of high voltage to an electrode which is positioned over the material to be treated, with this material typically supported by a ground plane or roll. Ground planes can be 1) bare metal and suitable for treating both conductive and nonconductive materials, 2) covered with a conductive coating, or 3) covered with a non-conductive coating and also suitable for treating both conductive and nonconductive materials. The latter type of   “universal” roll coverings is, for example, prevalent, but can be inherently inefficient in treating varying materials and thicknesses.