Retort Pouch Making Material, Color : Mulitcolor

The structure of the high-temperature resistant cooking bag has two layers, three layers, four layers, and even more.
Among them, the second layer is a transparent plastic/mold, such as PET / CPP or OPA / CPP.
The three layers are transparent plastic/mold, such as PET / OPA / CPP, and opaque types containing aluminum foil, such as PET / AL / CPP, OPP / AL / CPP.
The four layers are opaque PET / AL / OPA / CPP with aluminum foil. This structure is a puncture-resistant, reinforced, large-capacity packaging bag. The OPA should be reasonable between AL and CPP.
The more layers are mainly The inner layer does not use pure CPP film, but uses multi-layer co-extruded film, such as PA / EVOH / PP, PA / PVA / PP co-extruded film plus PET or aluminum foil to form a composite with more layers, but its quantity Not much.