There are usually three general printing layers in Aluminum bags at least,such as :printing layer + aluminum barrier layer + heat sealing layer.
The concrete situation of it is: PET (or PA) + AL + CPP (or PE).
Sometimes the Aluminum bags includes four layers, that is to say, there is a layer PA between the AL and CPP.
Functions of Aluminum bags
1.Better oxidation resistance and moisture resistance
2.The ability of dark barrier is better than other materials
3.Anti-static, anti-puncture, oxygen permeability
Products that Aluminum bags subjected the standard testing, which meet environmental requirements (available third-party test report).
What’s more, the materials in the products meet the most strict environmental standards of European Union and North America on the aspect of bags packaging.