The main role of the vacuum inflatable packaging vacuum packaging in addition to possess oxygen durability features, there is also the role of compression, gas barrier, preservation, etc., can make food more effectively long-term to maintain the original color, smell, taste, shape and nutritional value. In addition, there are many foods are not suitable for vacuum packaging must vacuum inflatable packaging. Such as crispy or crunchy foods, caking food, easy to deform away food oil, sharp edges or high hardness will pierce the bag food. After filling the vacuum food packaging, packaging bag inflatable bag outside pressure greater than atmospheric pressure, can effectively prevent food compressive deformation broken and does not affect the appearance of the printed bags. Filling the vacuum packaged in a vacuum and then filled with nitrogen, carbon dioxide, oxygen gas or a mixed gas of two single three gases. Its nitrogen is an inert gas, from the filling to make the bag to maintain a positive pressure to prevent outside air from entering the bag bag, food plays a protective role. Its carbon dioxide can dissolve in various types of fat or water, citing weak acidic carbonated, inhibit mold, bacteria and other microorganisms corrupt activity. Its oxygen inhibits the growth of anaerobic bacteria breeding, keep fruits and vegetables fresh and color, high concentrations of oxygen can maintain its bright red fresh meat.