Corona treatment systems are designed to increase the surface energy of plastic films, sheets and paper to improve wettability and adhesion of inks, coatings and adhesives. As a result, the treated material will demonstrate a better quality of printing and coating, and a greater resistance to rolling.
The Corona treatment is an electronic process also known as Corona Effect. It consists of two main components: The power supply and the treatment station.
The power supply uses standard line voltage and converts the single phase power supply to a higher frequency that is then sent to the treatment station. The treatment station applies this energy to the surface of the material, across a small air gap, via high potential electrodes to an electrically earthed roller that supports the material. In the system of corona treatment, the accumulation of voltage ionizes the air in the gap (the space between electrode and roller), creating a crown, which increases the surface tension of the layer of product (plastic, paper, other) being moved by the electrically “earthed” roller.