The traditional and ordinary packaging bags cannot meet the needs of the market, and the development of various bag-shaped bags such as special-shaped bags and stand-up bags is undoubtedly the whole plastic flexible packaging manufacturing industry. Plastic packaging bags In fact, the key points in the production process of self-supporting self-sealing aluminum foil bags are manipulated to deal with and solve the problems in time. The problem of non-leveling of self-supporting self-sealing aluminum foil bags is that the flatness is one of the index values to consider the appearance quality of packaging bags. Tea packaging bags, composite packaging bags The flatness of self-sealing aluminum foil bags is not only related to the selection of production and manufacturing materials, but also related to factors such as heat sealing temperature, working pressure, time and actual cooling effect. This will cause the composite bag to collapse and deform, which will endanger the forming of the self-supporting self-sealing aluminum foil bag behind; when the refrigeration is not enough, the self-supporting self-sealing aluminum foil bag after heat sealing will not be shaped enough, causing wrinkles. The problem of poor symmetry of self-supporting self-sealing aluminum foil bags, symmetry not only harms the appearance, but also harms the sealing. During production, it is necessary to pay attention to the tension control of the bottom material, which leads to the deformation of the bottom end or the wrinkle caused by the mismatch of the supporting force. food packaging bags, vacuum packaging bags