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The transfer film is also called a heat transfer film. The transfer film is characterized by high tensile strength, good thermal stability, low heat shrinkage, smooth surface and good peelability, and can be used repeatedly. It is mainly used as a vacuum aluminum plating carrier. After the PET film is placed in a vacuum aluminum plating machine, the rubber film is combined with the paper, and then the PET film is peeled off, and the aluminum molecular layer is transferred to the surface of the paperboard by the adhesive action.

A so-called aluminized cardboard is formed. Vacuum aluminum-plated cardboard is a kind of high-grade novel packaging material developed with metal-gloss cardboard. The aluminum-plated cardboard has bright color, strong metallic feeling and bright and elegant printing. It has a noble and beautiful metallic texture, and has environmental properties of being degradable and recyclable. It is a green packaging material.