The process consists of applying properly formulated micro-layers of coating, that provides the film with specific barriers and/or sealing properties.
The top-coating (usually acrylic based, EAA or PvdC) are realized in water dispersion and then deposited on BOPP film by “reverse gravure” technology. In some cases, a preliminary application of a primer is needed, in order to ensure an excellent film-coating adhesion.
Vibac's production equipment (L'Aquila plant) allows the top-coating application on both sides of film in a single step.