The aluminized stand up bag is a relatively new packaging form, which has advantages in upgrading the product grade, strengthening the visual effect of the shelf, portability, convenient use, freshness and sealability. Self standing bags are laminated from PET/foil/PET/PE structures. They can also have two or three layers of other specifications and materials. Depending on the different products packaged, oxygen barrier protective layers can be added as needed to reduce oxygen permeability and extend the shelf life of the products. The self standing bag with zipper can also be re closed and re opened. Because the zipper is not closed and the sealing strength is limited, this form is not suitable for packaging liquids and volatile substances.
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