Three elements to pay attention to in heat sealing bag making machine
2022-07-26
It is customary for us to call heat sealing temperature, heat sealing time and heat sealing pressure as the three elements of heat sealing Bag Making Machine . 1. Heat sealing temperature The function of the heat sealing temperature is to heat the adhesive film layer to an ideal viscous flow state. Since the polymer has no definite melting point, it is a melting temperature range, that is, there is a temperature region between the solid phase and the liquid phase. When heated to this temperature region, the film enters a molten state. The viscous flow temperature and synthesis temperature of the polymer are the lower and upper limits of heat sealing, respectively. The difference between the viscous flow temperature and the synthesis temperature is an important factor to weigh the difficulty of heat sealing. Side sealing bag cutting machine The heat sealing temperature is set according to the characteristics of the heat sealing material, the thickness of the film, the number of times of heat sealing and pressing and the size of the heat sealing area. When the number of times of ironing on the same part increases, the temperature can be appropriately reduced. When the heat sealing area is large, the temperature can be slightly higher. Heat sealing bag making machine 2. Heat sealing time Heat sealing time refers to the time the film stays under the hot knife, and it is also a key factor affecting the strength and appearance of the heat seal. The same heat sealing temperature and pressure, long heat sealing time, the heat sealing layer will be more fully fused, and the separation will be stronger. However, if the heat sealing time is too long, it is easy to cause wrinkling and deformation at the heat sealing seam, which affects the flatness and appearance. 3. Heat sealing pressure The function of the heat-sealing pressure is to make the polymer resin film in the viscous flow state produce effective molecular penetration and diffusion between the heat-sealing interfaces, so as to achieve a certain heat-sealing effect. Composite integrated bag making machine
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