Aluminum Foil 9 Micron Soft Temper Lamination Grade
In composite flexible packaging, the surface cleanliness of the aluminum foil is required to be high. Generally, it should reach level B or higher, and there is no uneven oil stain, so as to ensure that the composite adhesive has a good wetting effect on its surface, otherwise it will Affect the composite quality of the product. Therefore, in more than a dozen productions, we should remember to strictly control the quality, and we must do a good job in the inspection of the cleanliness of the aluminum foil. This cannot be ignored.
Application of aluminum foil in composite flexible packaging
As we have already introduced, in practical applications, aluminum boxes are generally used in combination with plastics, paper, etc. The main reasons are as follows:
1. The strength of aluminum foil itself is not high and it is easy to tear, so it is generally not used as a packaging material alone
2. The thermal adhesion of aluminum foil is poor, and it cannot be heat-sealed separately to make bags:
3. When packaging beverages and other foods, because the beverages often contain acidic substances, if acid, citric acid, lactic acid, etc., if the aluminum foil is directly used to contact the food, it may cause corrosion of the aluminum foil and may also cause pollution to the food. Therefore, from the perspective of aluminum foil, it must be combined with plastic film before it can be used for food packaging.
High-temperature retort packaging bags are one of the typical applications of aluminum foil in composite flexible packaging. High-temperature retort bags have a wide range of applications. All foods that require high-temperature sterilization can be packaged in high-temperature retort bags. The typical structure of high-temperature cooking bags is: stretched polyester (12um)/aluminum foil (9pm)/polyolefin (70um), using aluminum foil as the intermediate barrier layer material. Aluminum foil mainly plays the role of gas barrier, moisture-proof, shading, and improving the barrier performance of the package. The oxygen and moisture permeability are approximately zero, and during heating and cooling, the heat transfer rate can be increased to make the temperature of the cooking food uniform. , Can kill all bacteria, and the food can be stored for a long time, up to two years.
Aluminium Foil Specification We often encounter aluminum foil in our lives, whether it is in food, beverages, medicine, household daily necessities, etc., we can see the shadow of aluminum foil
