Changshu vacuum-packed bags of rice, whole grains vacuum bag, vacuum nylon bags are generally, that one, two or more of the base film (heat sealing PE film, CPP, BOPP) and nylon (airtight better) PET film special glue or adhesive by Franciscan (chemical products) through complex machine composite film. And then the cut bags made of vacuum after sealing performance is the best. Air barrier performance, oxidation resistance, waterproof, moisture and strong mechanical properties, high blasting performance, strong anti-puncture tear resistance, high temperature (121 ℃), low temperature (-50 ℃). Non-toxic, tasteless line with national standards. Good heat sealing properties, good transparency. Food bags, food itself is the final process, its own role is to protect food quality and hygiene, without loss of original composition and nutritional convenient transportation, promote sales, extend shelf life and enhance the important role of commodity value, and to some extent, food packaging has become an integral and important part of the food. Food packaging itself as a protective layer of food, has become an integral and important part of the food. Daily consumption of food as a special commodity, its nutritional health is extremely important, but easy to spoilage, food packaging as a means of protection, it must ensure food quality as commercial quality and safety and health in its circulation in the storage and transportation process.