Now, with the improvement of people’s living standards and the development of tourism, the demand for food such as soda, drinks, beer or cans is increasing, which requires modern packaging and decoration to facilitate competition in the international market. Recently, in order to meet the requirements of the broad market, people have developed plastic films or aluminized plastic packaging materials with good shielding, but their comprehensive functions are not as good as those of overcoating and laminating. It can be said that the aluminum foil bag is a relatively perfect packaging bag with a variety of excellent functions. Because of its excellent characteristics, aluminum foil is very suitable for packaging materials such as food, cigarettes, beverages or pharmaceuticals; Thermal insulation materials for buildings, vehicles, houses, etc. can also be used as gold and silver thread for decoration and decoration trademark of various printed materials. Among the above applications, aluminum foil is the most popular packaging material. Soft metal film can not only protect moisture, fragrance, air tightness, and light, but also non-toxic and tasteless. Moreover, after the aluminum foil is compounded with the plastic film, the shielding property of the aluminum foil is integrated with the strength of the paper and the thermal sealing property of the plastic, which further improves the shielding function of water vapor, air, ultraviolet light and bacteria that are necessary as packaging materials, and greatly expands the application market of aluminum foil. Because aluminum foil blocks the light, water and gas in the outer chain, the articles can be well protected. For cooking food, using aluminum foil bags as packaging materials can keep the food from deteriorating for at least one year.
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