The corona treatment of plastic film is done by passing the film through the corona discharge created between electrode and dielectric coveredearthed roller (usually silicon rubber sleeve). The air gap between electrode and roller is 2-3mm. Electrode is connected to electrical supply having high voltage & high frequency. As filkm passes through the corona discharge, molecules of surface gets oxidises which has more surface tension.
The corona discharge between electrode and roller is visible by violet color flame between them.
It has the capacity to make film wettable for converting. It formslow molecular weight metrial on the film surface and rids the film of organic and inorganic contaminants that can interfere with adhesion.
Our company provides clients with all corona treaters sizes needed for film