Moisture-proof aluminum foil bag , that is, usually referred to as aluminum plastic composite vacuum bag. This product is suitable for the packaging of large and precise mechanical equipment, chemical raw materials, pharmaceutical intermediates, etc. It can prevent moisture, light and have vacuum effect. Most of the products use a four-layer structure, with good water insulation and oxygen barrier function. Customers can customize different specifications or different styles of packaging bags that includes flat mouth, three-dimensional and other styles according to their own needs.