Our topic is the treatment of surfaces of polymer films and other substrates
Corona pre-treatment is currently the most commonly used technique in the industry for treating the surfaces of polymer films and other substrates. Corona is a dielectric barrier discharge (DBD) in air. The electrical discharge is controlled by a dielectric barrier and takes the form of streamers distributed over the surface. The aim of the polymer treatment is to increase the surface energy and thus the wettability and adhesion for laminating, printing and other processing methods.
In 95% of cases, corona treatment of a substrate is still the perfect way to improve surface adhesion.
By changing the surface energy of a non-absorbent material, such as a film or foil, corona treatment enables printing inks, coatings and laminate films to adhere correctly and evenly and deliver a high-quality result.
For the remaining 5% of cases, we offer iPlasma®.
However, in the remaining 5% of cases, corona treatment does not work due to the complex chemical composition of the substrate. In these cases, plasma treatment, or as we call it "iPlasma®", is required to achieve a secure bond. The difference is that the corona treatment is carried out in ambient air, while the iPlasma treatment requires a controlled environment and the use of a doping gas.
This allows plasma to offer a different functionality than corona and provide a range of surface properties.