With the expansion of the application field, more and more derivatives of square bottom bags are produced, and most of them are made of new materials, which are characterized by high strength, high barrier, non-toxic, tasteless, strong toughness, etc. At the same time, the production quality problems of Jinan square bottom bags are more common because of the difficulty in forming the bottom corners, the number of bottom heat sealing layers and the high requirements for bag making.
In the production process of soft plastic packaging bags, the process of hot sealing bag making is important and also a process for the quality control of packaging bags. If the process of hot sealing bag making is slightly improper, all previous efforts will be wasted, causing waste. Especially for square bottom bags with strict requirements for bag making process, this process should be strictly controlled.
Pay close attention to the heat sealing temperature of square bottom bag. Different materials need to cope with different heat sealing temperature ranges. The heat sealing temperature is a key factor affecting and controlling the heat sealing quality of square bottom bag. If the temperature resistance of the printing substrate is good, increasing the heat sealing temperature can improve the production efficiency; If the temperature resistance of the base material is poor, reduce the heat sealing temperature as much as possible. When the heat sealing temperature is too high, the heat sealing material at the heat sealing part will be melted and extruded, reducing the heat sealing strength of the square bottom bag.
Secondly, the heat sealing pressure and speed of the square bottom bag also need to be paid close attention to. The heat sealing pressure during the production of the square bottom bag should be determined according to the performance, thickness, heat sealing width, etc. of the composite film. The heat sealing speed is the actual embodiment of the production efficiency of the bag making machine, and also an important factor affecting the heat sealing strength and the appearance performance of the square bottom bag.
In addition, the tension should be well controlled during the production of the square bottom bag to keep the film flat and avoid the shrinkage and warping of the heat sealing part of the square bottom bag. In addition, during the heat seal cooling, it is necessary to avoid the adverse factors such as high water temperature, poor cooling water circulation, etc. that will lead to poor cooling and reduced heat seal strength.
How to control and improve the production quality of square bottom bags? The above is the relevant answer to the question. Do you have any ideas about it? Or you can come to our website for purchase http://bjmj111.com Get in touch!