The primary goal of the metallizing process is the increment of impermeability to gas, steam, humidity, and light, and at the same time it is used to provide the preservation of the characteristics of the substrate.
Metallization belongs to the types of process called “P.V.D” ( Physical Vapour Depositation): a variety of vacuum deposition methods used to deposit thin films by the condensation of a vaporized form of the desired film material onto various work piece surfaces. The product is a very thin and uniform film that merges coherently with the chosen substrate.
The process: the film coil ( whether it is OPP, CAST, LDPE, HDPE, PET, PVC, PS, OPS, NYLON, or paper, paperboard, woven and nonwoven fabric, and biodegradable film) is placed inside the vacuum metallizer, where the metallization takes place in high vacuum conditions, about 10-4 hpascal. The film coil is then rolled and unrolled many times on another axle. During the unrolling, the film passes through a special roller, below which are positioned the evaporators.