Atmospheric pressure plasma and low pressure plasma
Artificially generated plasma is used, for example as a physical surface pre-treatment method. In contrast to "hot" plasmas for plasma welding or plasma cutting, these technologies are called "cold" plasmas. Here, a distinction is made between low-pressure plasma (NDP) and atmospheric-pressure plasma (ADP). ADP systems are typically devices that can be integrated into various automation solutions under normal pressure conditions and where the plasma chamber is located in a head that can travel over the area of a component to be processed. ADP systems are ideal for integration into production lines for industrial applications, for example, for the application of adhesive beads or liquid sealants.
NDPs are chamber systems in which a vacuum is first created and then a process gas is introduced, which is then sparked off to form plasma. In NDP systems, the components are placed or injected into a chamber. In this vacuum chamber, the plasma can reach and rinse almost the entire exposed surface including cavities of a product, whereas ADP systems are used selectively and are limited in their effective depth and width.