Aluminum foil bags, as the name implies, are bags containing aluminum foil in composite materials.Alu minum foil bags are widely used and are related to the material properties of the aluminum foil itself.
The biggest advantage of aluminum foil in aluminum foil bags is that they block oxygen and moisture very well., and the water permeability and oxygen permeability are all 1, which is a good barrier material. In addition, the aluminum foil in the aluminum foil bag has good heat resistance, good light reflectivity and gloss, good shape at high temperature and low temperature, and is suitable for high temperature cooking, and can withstand up to 125 degrees Celsius.
However, as the material itself, the aluminum foil in the aluminum foil bag also has its own limitations. First of all, the biggest disadvantage of aluminum foil is that it is very brittle and easy to break. More difficult to compound.
Secondly, the biggest disadvantage of aluminum foil is that it is poor in acid resistance. Therefore, when packaging juice or acid, it is generally not placed in the inner sealing layer, so as to ensure that it will not be separated by acid penetration. Furthermore, it has no heat sealability and cannot be used as the innermost layer of the composite bag.
In combination with the above material properties, the aluminum foil in the aluminum foil bag can only be used as the middle material of the bag.