Aluminum foil packaging bags are usually used in the food industry, called food aluminum foil bags; in the electronic product industry, called anti-static bags or anti-static moisture-proof aluminum foil bags; precisely because of its barrier properties, heat-sealing properties, high temperature resistance, low temperature resistance, oil resistance and Fragrance retention and other characteristics. Therefore, the operating fields of aluminum foil packaging bags are relatively wide.
The biggest advantage of aluminum foil in aluminum foil packaging bags is that it blocks oxygen and moisture very well. The water and oxygen permeability are both 1, making it a good barrier material. In addition, the aluminum foil in the aluminum foil bag has good heat resistance, good light reflectivity and gloss, and good shape at high and low temperatures. It is suitable for high-temperature cooking and can withstand up to 125 degrees Celsius.
However, as the material itself, the aluminum foil in aluminum foil packaging bags also has its own limitations. First of all, the biggest disadvantage of aluminum foil is that it is very brittle and easy to break. It is more difficult to combine.
Secondly, the biggest disadvantage of aluminum foil is its poor acid resistance, so when packaging juice or acidic items, it is generally not placed in the inner sealing layer to ensure that it will not be penetrated by acid and separate. Furthermore, it has no heat sealability and cannot be used as the innermost layer of a composite bag. Based on the above material characteristics, aluminum foil in aluminum foil bags can only be used as the middle material of the bag.
The advantages and disadvantages of aluminum foil packaging bags are as follows:
advantage. It has good oxygen barrier and waterproof properties, and is a good barrier material; the surface has good light reflectivity, strong heat resistance (121℃) and low temperature resistance (-50℃), high temperature and Good shape at low temperatures; non-toxic and odorless, meeting food and pharmaceutical packaging standards.
shortcoming. Aluminum foil is very brittle and difficult to composite, so the aluminum foil bag is easy to break; it has poor acid resistance, so it cannot be placed in the innermost layer when packaging juice or acidic items.
