In most cases, the anti-static aluminum foil bag we use in our daily life has three functions -- anti-static, moisture-proof and anti-electromagnetic interference, which under the reason that the bag's four-layer structure undoubtedly played a crucial role. The first layer is the PE which can properly eliminate static electricity, so that the anti-static function of the bag can be better. Compared with the other three-layer structure, it can make electronic products in the package avoid to rust, pollution and damage, bring lots of pros and convenience in the need of packing.