Title: The principle and material selection of aluminum foil pouches.
Aluminum foil pouch is an environmentally friendly packaging material widely used in food packaging, medical supplies and other fields. Its main component is metallic aluminum, which is treated by a special process to form a thin and strong film.
The principle of making aluminum foil bags is mainly to prepare metal aluminum by electrolysis or melting method, and then press the aluminum sheets into aluminum foil and compound it with plastic film to form aluminum foil bags. This packaging material has good waterproof, moisture-proof, airtight and heat-sealable, which can effectively prevent food from being deteriorated by moisture and prolong the shelf life.
In terms of material selection, aluminum foil bags are generally made with a purity of up to 999% aluminum foil, and plastic film that meets food safety requirements, such as polyethylene, polypropylene, etc. Among them, polyethylene is widely used in the food packaging industry due to its excellent barrier properties and weather resistance.
In addition, foil pouches have some other features. For example, it has good properties of reflecting light and heat, which can reduce the exposure of sunlight to food and keep food fresh;It has a smooth surface and is easy to print, and can be customized with various patterns and texts to increase the aesthetics of the product.
In general, aluminum foil pouches are an efficient and environmentally friendly packaging material, which has been widely used in various fields due to its unique advantages. In the future development, aluminum foil bags will continue to play an important role and provide more convenience for human life.