Aluminum foil bags are a multi-layer packaging material commonly used to package food, medicine, cosmetics and other products.
It is made of polyester film or polyester aluminum foil film as the surface layer. It has excellent tensile strength and heat resistance and can protect the inner items.
The aluminum foil layer is an important part of the aluminum foil bag. It has good moisture-proof, anti-oxidation, fresh-keeping and heat-insulating properties, and plays a protective role in the inner items.
The middle layer is usually made of composite materials such as nylon, PET, CPP, etc. It has good moisture-proof and anti-oxidation properties and can effectively extend the shelf life of the inner layer items.
The adhesive layer is generally made of polyethylene, polypropylene and other materials. It has good sealing and corrosion resistance and can avoid contamination of inner items.
The inner layer is made of polyethylene, polypropylene and other materials, which has good moisture-proof, water-proof and corrosion-resistant properties and can protect the quality of the inner items.
In short, the structure of the aluminum foil bag is clearly layered, and each layer has a unique function and role. By selecting appropriate materials and well-designed structures, aluminum foil bags can effectively protect the inner items, extend their shelf life, and ensure that their quality is not affected by the external environment.
