Bait self-supporting zipper bag

The rise of bait self-supporting zipper bag brings a new economic growth highlight for flexible packaging industry. At present, many flexible packaging enterprises in order to promote the rapid development of enterprises, the introduction of the corresponding equipment and production technology. But in the daily production, the bait self-supporting zipper bag will also appear a variety of production quality problems.

As we all know, flatness is one of the indicators to measure the appearance quality of packaging bags. The flatness of self-standing zipper bag of bait is related to heat sealing temperature, heat sealing pressure, heat sealing time and cooling effect in addition to material factors. Too high heat sealing temperature, too high heat sealing pressure and too long heat sealing time will cause shrinkage deformation of composite film. Insufficient cooling will lead to insufficient shape after heat sealing, which cannot eliminate internal stress and wrinkle the bag. Therefore, process parameters should be adjusted to ensure the normal operation of cooling water circulation system.

Symmetry not only affects the appearance of the bait self-standing zipper bag, but also affects its sealing performance. The common asymmetry of bait self-standing zipper bags is often reflected in the bottom material section. Due to the improper tension control of the bottom material, the bottom hole deformation or the tension mismatch with the main material, the heat sealing strength is reduced. When the round hole of the bottom material is deformed, the feeding tension should be properly reduced, and the waiting time should be increased to correct the heat sealing, so that the four layers at the bottom of the bag are fully heat-bonded. In addition, bag asymmetry is also related to photoelectric tracking, feeding, cursor design, rubber roller balance, stepper motor or servo motor synchronization and other factors. In the specific operation process, the problem should be solved according to different products and bag-making equipment.