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Below, we will discuss the key issues and applications of flat bottom bag production.
Publication Time:
2022-01-14 09:28
Below, we will discuss the key issues and applications in the production of square-bottom bags.
How to correctly control the key points in the production of square-bottom bags
Square-bottom bags are so named because of their square bottom and have many applications in various aspects of daily life and production. With the expansion of application fields, more and more square-bottom bag derivative products are produced, mostly made of new materials, with characteristics such as high strength, high barrier, non-toxic, odorless, and high toughness. At the same time, due to the difficulty of bottom corner forming, the multiple layers of heat sealing at the bottom, and the high requirements for bag making, quality problems in the production of square-bottom bags are also quite common. Then, next.
As we all know, in the manufacturing process of soft ethylene packaging bags, the heat sealing process is extremely important and is also a process for inspecting the quality of the packaging bag. Any slight mistake during heat sealing will render the previous work useless, especially for square-bottom bags with strict bag-making processes, this process must be checked more strictly.
First, the heat sealing temperature of the square-bottom bag must be strictly controlled. Although the heat sealing temperature range varies for different materials, the heat sealing temperature is an important factor affecting and controlling the heat sealing quality of the square-bottom bag. If the printing substrate has good temperature resistance, increasing the heat sealing temperature can improve production efficiency. When the substrate has poor temperature resistance, try to lower the heat sealing temperature. When the heat sealing temperature is too high, the heat sealing material at the heat sealing part will also melt and extrude, thereby 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 strictly controlled. The heat sealing pressure of the square-bottom bag is determined according to the performance, thickness, and heat sealing width of the composite film. The heat sealing speed is the actual reflection of the production efficiency of the bag-making machine and is also an important factor affecting the heat sealing strength and appearance performance of the square-bottom bag.
In daily life, we always see plastic bags of specific shapes. Attentive people will notice that there are plastic bags on the outside of various electrical appliances, matching the size of the appliances.
Square-bottom bags are very common in our lives, but not everyone knows their function, so their value cannot be realized. Custom-made plastic bags fit tightly with the corresponding plastic bags, providing a certain degree of protection.
The square-bottom bags mentioned above can not only be used to package some electrical appliances, etc., but also can prevent wind and dust. When electrical appliances are not used for a long time, square-bottom bags can be used to prevent wind and dust. Even if damaged during movement, their components are made of synthetic resin, which means they will not have a significant impact on the environment, in line with the current national environmental protection concept.
In addition, when manufacturing square-bottom bags, in order to keep the film flat and avoid shrinkage and warping of the heat-sealed part of the square-bottom bag, the tension must be well controlled. In addition, please avoid unfavorable factors such as high water temperature during heat sealing cooling and poor cooling water circulation, which can lead to poor cooling and reduced heat sealing strength.
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