Changshu 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. Changshu 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. Materials and packaging machinery and raw material costs reduced food packaging. Food packaging industry in the future will be more and more use of light weight and low cost materials to reduce production costs and pollution. More and more features are designed towards saving materials, packaging process of saving goal. This is also the current food packaging industry and enterprises are facing the biggest confusion.