Why can aluminum foil make food packaging bag?
Food packaging bags can be used in a variety of materials, including a variety of functional plastics, paper and aluminum foil , etc. Many people find it strange why aluminum foil can make food packaging materials? What are the characteristics of food packaging bags made from aluminum foil ? Today, Hennan huawei aluminum foil with everyone together to explore.
Aluminum foil used in the production of food packaging bags are usually made of aluminum foil and other materials. There are two main reasons why this works.
First, the composite process requires that the composite substrate must be sheet shape, while the metal aluminum foil can be easily processed into aluminum sheet material due to its low hardness and good ductility. The thickness of aluminum foil is 0.005 mm~0.009mm.
Second, the aluminum foil nature is very lively, very easy to be oxidized by oxygen in air, forming a layer of dense oxide Al2O3 protective film on the metal surface, the nature of Al2O3 in air environment is extremely stable, can prevent further oxidation of aluminum oxygen. Of course, the use of aluminum foil bags made of this layer of dense protective film can be a good way to isolate the outside air into the bag inside, to prevent the role of food oxidation deterioration.