1. It depends on whether your bag making machine is side sealing or bottom sealing. If the side sealing is not strong, look at whether both sides of the bag are not strong or one side is not strong.

2. The simple problem is whether the temperature of the equipment reaches the sealing temperature of your bag-making material.

3, if the packaging bag is the bottom seal, if the sealing is not strong, mainly reflected in whether there is pressure on the sealing knife, or check whether there is a damage to the heating piece (tube) of the sealing knife, and detect whether the temperature of the cutting knife reaches the standard.

4. For the printing position of the product, if the sealing position is very low or close to the edge, the sealing position is not strong. It also depends on whether the product is loaded too slowly, which is also not good for sealing.