Metallisiert

Metallisiert is the German term for a surface that has been coated with a thin layer of metal. The process, called Metallisierung, involves depositing a metallic film onto a substrate such as plastics, glass, ceramics or textiles. The metal layer is typically very thin, ranging from a few nanometers to a few hundred nanometers, and serves to alter optical, electrical or barrier properties of the surface.

Methods used for metallization include physical vapor deposition techniques such as thermal evaporation and sputtering, as well as electroplating or, in some cases, chemical vapor deposition. The choice of method depends on the substrate, desired metal, coating thickness, and application requirements. Common metals are aluminum (the most widely used for films), as well as copper, silver, gold, nickel and chromium.

Applications of metallized materials are diverse. In packaging, metallized films (for example metallized PET or BOPP) improve barrier properties against moisture and gases and provide a metallic appearance and reflectivity. In optics and construction, metallized coatings enhance reflectivity and thermal properties. In electronics and photovoltaics, metallization refers to forming conductive paths and contacts on surfaces, often with precise patterning.

Advantages of metallization include reduced weight, improved barrier performance, electrical conductivity and optical properties. Limitations include potential susceptibility to mechanical damage and delamination if adhesion is poor, as well as recycling challenges for multilayer laminates. Environmental and cost considerations relate to the chosen metal and deposition process, as well as the lifecycle of the coated product.