Foil bags are not toxic. The inside of the aluminum foil insulation bag is a soft insulation material such as foam, which meets the food safety regulations. Aluminum foil has excellent barrier properties, good moisture resistance, and thermal insulation. Even if the heat reaches the middle PE airbag layer through the inner aluminum foil layer, heat convection will be formed in the middle layer, and it is not easy to penetrate the outer aluminum foil layer, so as to achieve a good heat insulation effect.
What material is the gold on the outside of the aluminum foil lunch box?
oxide layer.
Aluminum foil is a hot stamping material that is directly rolled into thin sheets from metal aluminum.
Due to its excellent properties, aluminum foil is widely used in food, beverages, cigarettes, pharmaceuticals, photographic film, household items, etc. Usually used as packaging materials, electrolytic capacitor materials, and heat insulation materials for buildings, vehicles, ships, houses, etc. It can also be used as decorative gold and silver thread, wallpaper, various stationery prints, and decorative trademarks of light industrial products.
In a variety of applications, the most effective performance of aluminum foil is as a packaging material.
