With the improvement of people's living standard, people's demand for products and the pursuit of products is more and more high. The packaging bag, for example, cannot be sealed after opening, resulting in food spoilage due to moisture. Although there is an option to seal the bag with a clip, this can be a bit cumbersome for consumers. They want the bag to have its own zipper. Therefore, since the production of pe zipper bags, most brands of food are increasing the proportion of pe zipper bags to meet the needs of consumers.

      PE zipper bag refers to the zipper can be repeatedly sealed by pressing the bag, through the polyethylene (LDPE) and high pressure linear polyethylene (LLDPE) can blow film molding, hot machine bags, including the clip chain zipper bag is often one-time molding, after filling or taking out, can be repeatedly sealed through the opening of the convex edge and groove, open the plastic film bag. Commonly used materials include PE, EVA, PO, multilayer composite zipper bag and so on.

      PE zipper bag has the characteristics of moisture-proof, fresh-keeping and quality assurance, good sealing, easy to carry and long service life. Due to the use of high barrier properties of co-extrusion film, can be a good barrier oxygen and water. It can be used for vacuum packaging, aseptic packaging and inflatable packaging. It can be used in preserved fruits, snacks, medical instruments, electronic components, tea and other fields, in order to extend the shelf life of food after opening the bag has made outstanding contributions. High quality zipper bags can also be reused as household storage bags, which are good for consumers and the environment.

      An important indicator of whether pe zipper bag is easy to use is the opening force of the zipper. If the zipper edge is convex, the groove is not close enough, the opening force is small, it will cause poor air tightness, reduce the barrier, easy to leak, no protective effect; If the edge is convex, the groove is too tight, it is difficult to open, and even the plastic film on both sides of the zipper bag is stretched and deformed, which affects the convenience of use.