White kraft paper aluminized self sealing bag
White kraft paper self-supporting bag is a relatively novel packaging form, which has advantages in improving product grade, strengthening shelf visual effect, portability, convenient use, preservation and sealability. The self-supporting bag is laminated by PET / foil / PET / PE structure. It can also have 2 layers, 3 layers and other specifications. It can be determined according to different products packaged. The oxygen isolation protective layer can be added as needed to reduce the oxygen permeability and prolong the shelf life of the product.
The self-supporting bag with zipper can also be re closed and re opened. Because the zipper form is not closed and the sealing strength is limited, this form is not suitable for packaging liquids and volatile substances. According to different edge banding methods, it is divided into four edge banding and three edge banding. Four edge banding means that there is a layer of ordinary edge banding in addition to the zipper sealing when the product package leaves the factory. When in use, the ordinary edge banding needs to be torn off first, and then the zipper is used to realize repeated sealing. This method solves the disadvantage that the zipper edge banding strength is small and is not conducive to transportation. The three edge sealing directly uses the zipper edge sealing as the sealing, which is generally used to hold light products. The self-supporting bag with zipper is generally used to pack some light solids, such as candy, biscuits, jelly, etc., but the self-supporting bag with four edges can also be used to pack heavy products such as rice and cat litter.
Kraft paper bag is non-toxic, tasteless and pollution-free. It meets the national environmental protection standards. It has high strength and high environmental protection. It is one of the environmental protection packaging materials in the world.
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