In composite packaging, aluminized PET film and CPP aluminized film are mainly used. Aluminized PET film is usually used as the middle layer because aluminized PET has no heat sealability and cannot be sealed and packaged well. Aluminized CPP can be used as the inner layer of composite packaging. This is aluminum coating.
Aluminized film is essentially a plastic film. It is a thin layer of aluminum steamed on top of plastic film. The plastic substrate can be PET film, OPP film, CPP film, PVC film and nylon film. Aluminum foil is essentially metal. It is a sheet formed by rolling a thin enough aluminum profile.
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Used to package products in flexible packaging. Of course, aluminum foil is not heat-sealable and needs to be laminated with other materials (such as PE, CPP or coating). Metal foil used for flexible packaging is usually 7um thick. Of course, it involves pharmaceutical packaging. There are 15um, 20um, 22um and 40um. Aluminum coatings provide far better barrier properties than aluminum foil because the aluminum layer is not as thick as aluminum foil. Of course, different thicknesses of aluminum foil are used for different purposes. Therefore, the packaging cost of electroplated film is much lower than that of aluminum foil packaging.
