Atmospheric-pressure plasma and low-pressure plasma
Artificially-created plasma is used as a physical surface pre-treatment method. Alongside “hot” plasmas for plasma welding or plasma cutting, these technologies are considered “cold” plasmas. We make a distinction here between low-pressure plasma (LPP) and atmospheric-pressure plasma (APP). APP systems are typically devices which can be integrated into various automation solutions under normal pressure conditions, and where the plasma chamber is located in a head which can move along the section of a part to be processed. APP systems are ideal for integration into production lines for industrial applications, for example before applying adhesive beading or liquid seals.
LPP are chamber systems in which a vacuum is first created and then a process gas fed through, which then ignites to form plasma. In LPP systems, the components are placed or fed into a chamber. The plasma can reach and flush virtually the entire open surface of a product, including cavities, whilst APP systems are used on specific points and are limited with regard to their effective depth and width.