The square paper bag machine is mainly divided into two kinds of roll paper bag machine and sheet paper bag machine according to the paper feeding method. However, the square paper bag machine is also perfect and has problems with failure. Common is sealing. Not strict, let's look at the reason why the bottom paper bag machine is not tightly sealed.
1. Heat sealing time is too long.
2. Heat sealing temperature is too high.
3. Too much pressure.
4. The edge of the top sealer is too sharp or the coating Teflon is damaged.
5. The silicone rubber on the bottom is too hard.
6. After the plastic composite packaging bag is cooled and placed, the heat sealing strength is increased, and it is also easy to become brittle.
7. During compounding and curing, part of the adhesive penetrates into the film. The substrate is affected by the penetration of the adhesive, the toughness (impact resistance) is reduced, and the brittleness is improved.
The above is what I shared for you.

The reason why the square paper bag machine is not sealed is that we need to find a solution because we know why the square paper bag machine is not tightly sealed.