Zhangjiagang shielding bag can effectively isolate objects with external electrostatic field, to prevent static bag to protect the items from static electricity hazards, but also anti-electromagnetic interference for the PCB, LED and other static-sensitive components. Zhangjiagang shielding bags can maximize the protection of sensitive electronic components from electrostatic potential hazards. Their unique four-layer structure can be formed induction effect to protect the goods inside the static field. In addition there is a layer vinyl to eliminate static composition, it can prevent static electricity in the bag. This sealable bag is translucent, clearly recognizable from the outside can be internal items. The surface resistance can be achieved: 10Ω ~ 10Ω. Although vacuum packaging and inflatable packaging looks completely different packaging, but the purpose is the same: that is to extend the shelf life of food, from that point, the two packaging is actually not good or bad, as what kind of packaging, mainly have to depend on the product itself, such as cakes can not be chosen in order to prevent fragmentation vacuum packaging, vacuum packaging and meat is still the preferred.