The characteristics of aluminum foil: The surface of aluminum foil is very clean and hygienic, and the surface will not breed microorganisms. It can be directly in contact with food without worrying about endangering human health. As an opaque packaging material, it has a good protective effect on products exposed to the sun, such as oily products, solid beverages, coffee, etc. It is a good packaging material, no matter at high temperature or low temperature, aluminum foil will not have a penetration phenomenon. The air permeability and moisture permeability are low, which can well protect indoor products. The aluminum foil itself is not volatile, and it and the packaged food will not dry out or shrink. It is a tasteless and tasteless packaging material that does not cause any peculiar smell in the packaged food. Stable performance, suitable for storage in various high and low temperature environments, and has certain corrosion resistance.