The development of aluminum foil packaging is closely related to the advancement of material composite technology. Composite materials are divided into base layer, functional layer and heat sealing layer: the base layer mainly plays the functions of aesthetics, printing and moisture blocking; the functional layer mainly plays the functions of barrier and light protection; the heat sealing layer is in direct contact with the packaging items and plays the role of adaptability, durability and so on.
Permeability, heat sealability and other functions. With the development of base materials and composite technology, the functions of aluminum foil packaging will continue to improve..
