Although composite bags can make up for the shortcomings of ordinary bags, composite bag manufacturers find that composite bag sealing often has defects. If the composite bag is heat-sealed, if you do not pay attention to these conditions, the sealing will fail or the sealing will not be tight.
1. No preheating
In fact, most of the sealing requires pre-heat treatment. If the sealing is not pre-heated directly, the lubricant of the composite bag will easily precipitate. After the precipitated lubricant is precipitated, the strength of the composite bag will be reduced, and the sealing position is because The presence of lubricant leads to a loose seal.
Therefore, the composite bag manufacturer recommends pre-heat treatment when sealing composite bags at home, otherwise the sealing may fail due to imperfect sealing.
2. Less heat many times
For speed, some people often increase the temperature at one time, and then complete the sealing at one time. Although this can also achieve the sealing, the effect of the sealing is far less than the repeated heating.
Because the sealing operation with less heat and multiple times can improve the tolerance of the sealing, and the sealing with less heat and multiple times can reduce the precipitation of lubricant and increase the sealing effect.
3. Heat sealing time
Although the effect of less heat and multiple times is better, but also pay attention to the heat sealing time when heat sealing. If the hot rod cannot stay in a certain seal for a long time, it will lead to the sealing temperature in one place and the sealing in other places. If the temperature is different, the temperature difference will cause the strength difference and the sealing effect will not be good.
In short, composite bag manufacturers suggest that you must pay attention to the above details when sealing, especially family-made sealing. Unprofessional steps will cause the sealing to be different from the manufacturer’s sealing, which will affect the use of composite bags.