An attractive look and abrasion resistance are quality features in demand for control panels on washing machines, ovens, and other appliances. High-gloss white polypropylene components are used that will then be pad printed. Pre-treatment is required, however, to ensure that solvent-free ink will adhere securely to these non-polar plastics.
Conventional pre-treatment methods (such as corona or flame) are not much help in pre-treating high-gloss polypropylene (PP) because they generally result in thermal destruction of the gloss surface.
Openair-Plasma® treatment offers the ideal solution; rotating plasma jets achieve high surface activation with the lowest possible thermal impact.