In the constantly growing market for packaging, there is indirect competition between the market segments classified according to materials, in which there is a tendency towards expansion into packaging forms of other material groups. Metal as a printing substrate is a material that has a number of special properties compared to plastic, glass and cardboard that can be used to increase competitiveness. In order to achieve this goal, this work is dedicated to the scientific processing of metal packaging and metal decorating respectively. In addition to the classification of the enormous variety of products, the specific requirements for metal packaging and the printing press and line configurations used, the materials used - tinplate, coatings and inks - as well as process-specific features are also taken into account. The experimental focus of this work is on the investigation of being able to print tinplate directly with UV inks, as this offers the potential for streamlining printing processes. In addition to accompanying color development and the analysis of the tinplate used, as well as the inclusion of partially standardized test methods for formability, the investigation of surface properties and their possible modification also play an important role. Due to the difficulties in achieving sufficient adhesion of UV-based ink systems to tinplate, the effect of pretreating tinplate with UV rays from different wave spectra is being investigated in detail experimentally for the first time. By measuring the contact angles and determining surface energies, the wetting modifications of the tinplate caused by UV radiation are first characterized and, in a further step, the adhesion properties of the UV ink application are evaluated by using the cross-cut test. Of the UV pretreatments examined, the use of a high-energy Xe excimer emitter with a wavelength peak at 172 nm is the most effective UV-based pretreatment process for modifying the surface properties. Moreover, the results show that the chromium-free tinplate currently under development has such favorable wetting properties that pre-treatment could be dispensed. The results finally lead to a derived conceptual conclusion with regard to a new line configuration for coating and printing tinplate. | English |