The development of aluminum foil packaging is closely related to the advancement of material composite technology. The composite material is divided into a base layer, a functional layer and a heat seal layer: the base layer mainly functions as aesthetics, printing, moisture resistance, etc.; the functional layer mainly functions as a barrier, and is protected from light; the heat seal layer is in direct contact with the packaged article, and is adaptive and resistant. Permeability, heat sealability and other functions. With the development of base materials and composite technology, the function of aluminum foil packaging will continue to improve.
Due to its excellent properties, aluminum foil is widely used in food, beverages, cigarettes, pharmaceuticals, photographic bases, household daily necessities, etc., and is usually used as its packaging material; electrolytic capacitor materials; thermal insulation materials for buildings, vehicles, ships, houses, etc.; As a decorative gold and silver wire, wallpaper and various types of stationery printed matter and light industrial products, decorative trademarks.
Among the above various applications, the most effective performance of the aluminum foil is as a packaging material. Aluminum foil is a soft metal film, which not only has the advantages of moisture-proof, air-tight, light-shielding, abrasion resistance, fragrance preservation, non-toxic and tasteless, but also because it has an elegant silver-white luster, it is easy to process beautiful patterns of various colors and The pattern is thus more popular with people.