Aims of the project
Due to their low specific weight, cost-effective production and simple processing, plastic films are used in many branches of industry. In order to adapt the films in their properties even better to the respective applications, modifications of the volume properties or surface coatings occur. For example, packaging films are provided with transparent barrier layers, or printing inks and lacquers are cured with low-energy electrons.
Different technologies (vacuum coatings, wet chemical deposition methods) and partially combinations of these are applied. Current technology combinations for the production of functional films, for example with permeation barrier properties, are based on these individual technologies, whereby they are applied only additive.
Up to now, the coordination of the individual technologies has only been rudimentary in terms of their interaction in technology and application. This results in today's standard multi-layer systems on film substrates which, although they have a moderate permeation barrier, do not adequately meet the application requirements in their optical and other properties and are very cost-intensive.
Within the OptiPerm project, the interaction of the individual technologies is already being investigated on machine level and beyond. For this purpose, the production of optimized permeation barrier layer systems for functional films made from electron beam crosslinked lacquer layers in combination with PVD layers is investigated.