Aluminum foil refers to an aluminum material with a purity of 99.5 and a thickness of less than 0.2mm. It has the advantages of light weight, strong light shielding, good insulation, good shape stability at high and low temperatures, soft texture, good ductility, and easy processing. It is one of the commonly used materials in modern packaging. However, aluminum foil can easily form a vacuum or wrinkle during packaging or use, thus reducing its barrier function.
Moreover, the biggest disadvantage of aluminum foil is that it has poor acid resistance. Aluminum foil is easily penetrated by acidic items such as juice and produces a separation layer. Technical implementation factors: This request provides a composite aluminum foil to solve the poor acid resistance of aluminum foil. Aluminum foil is used in packaging fruit juice. Or acidic items, it is easy to be soaked by juice or acidic items, causing the problem of layer separation.
This request provides a composite aluminum foil for packaging acidic items. The composite aluminum foil includes an acid-resistant layer, an aluminum foil layer, a paper layer, and a plastic layer in sequence from the inner band to the outside. The above layers are bonded together. Agent connection, during which the acid-resistant layer is in direct contact with the acidic items to be packaged, to prevent the acidic items to be packaged from corroding the aluminum foil layer.
Composite aluminum foil includes an acid-resistant layer, an aluminum foil layer, a paper layer, and a plastic layer arranged sequentially from the inner band to the outside. The above-mentioned layers are connected through adhesives. During this period, the acid-resistant layer is in direct contact with the acidic items to be packaged. , used to prevent acidic items to be packaged from corroding the aluminum foil layer. In this request, an acid-resistant layer is added to the inside of the aluminum foil layer, and the acid-resistant layer is in direct contact with the acidic items to be packaged.
