Aluminum foil and tin foil disposable kitchenware have outstanding barrier properties. Under the premise of sufficient thickness of aluminum foil, they can basically completely block gas and moisture. Therefore, in plastic flexible packaging materials, aluminum foil is commonly used as a barrier material, and aluminum foil has quality A series of advantages such as light weight, airtightness and good covering. It is mainly hygienic, beautiful, and can be insulated to a certain extent.