The three common causes of air leakage in vacuum packaging bags are delamination of the heat-seal layer, puncture of the bag by sharp objects, and respiration of the packaged product itself. Therefore, it is also necessary to start from these three aspects and explore preventive measures.
First, choose the appropriate thickness. Vacuum packaging needs to be of appropriate thickness. A vacuum bag that is too thin is easy to be punctured, and a vacuum bag that is too thick is not easy to seal after vacuuming. This problem is more obvious on some small household vacuum machines. In either case, it will cause the vacuum packaging bag to lose its function. Therefore, it is recommended to choose a larger packaging bag manufacturer. They are more skilled in making vacuum packaging bags and can avoid this problem to a large extent.
Second, choose the appropriate heat seal strength. When heat sealing, it is necessary to set reasonable heat sealing parameters according to the thickness, size, use, material, etc. of the vacuum packaging bag, so as to ensure the effect after vacuuming. Therefore, it is recommended to choose a factory with large-scale vacuum production machinery to provide guarantee for the quality of vacuum packaging bags on the equipment.
Again, strengthen the protection during transportation. Now that the logistics industry is developed, many products need to go through long-distance transportation before they can enter various sales points. During the transportation process, the vacuum packaging bag may experience extrusion, collision, friction, or be pierced by sharp objects. Therefore, it is recommended to maintain a clean and stable environment during transportation to avoid the vacuum packaging bag being punctured.
Finally, avoid packing items like seeds. The important feature of vacuum packaging is to discharge oxygen, but some foods that can breathe, such as plant seeds, plant roots, etc., often undergo respiration during storage. . The principle is similar for roots and tubers. Some plant root pickled foods, such as pickled mustard, the ginger in the food is not pickled, the cells are still alive, and they will also undergo respiration, resulting in swelling. Therefore vacuum packaging is not recommended.