Barriereeigenschaften aluminiumbedampfter Kunststoffolien

In this work it was investigated whether the optical density, electrical resistance and amount of aluminium vacuum-deposited can be used as indirect measurable variables for barrier properties obtained by vacuum deposition. In addition, the surface properties of the substrate films, structure and chemical composition of the vacuum-deposited aluminium layers as well as flaws in the films were determined and their influence on the permeability properties of the metallized films were investigated. Additionally, it was investigated how mechanical stresses have an effect in the individual film processing steps and in the transport of whole packs as well as climate and products on the permeability properties of aluminized films and composite films produced from them and through which the changes ascertained are caused. Metallized PETP and BOPP films as well as industrially produced composites were used in industrial plants and in stationary laboratory plants