In the protective packaging of pharmaceuticals, pharmaceutical packaging aluminum foil is a major material. The main reasons for the use of aluminum foil include: Excellent barrier properties: It can completely block moisture, microorganisms, light, oxygen, and other gases; Safety: Due to the metal annealing process during the manufacturing process, aluminum foil is sterile when used. In addition, it is harmless to health, there is no plasticizer, it is also environmentally friendly; mechanical properties: both flexible and malleable, very easy coating, printing, compounding, slitting, cold forming, embossing, these characteristics make aluminum foil become a A common packaging material.