Turn down the temperature of the sealing machine heat sealing knife
The height of the sealing line is incorrect, the height of the sealing line should be half the height of the package
The pressure of the sealing rack is uneven, although the horizontal position of the sealing rack needs to be adjusted
The heat sealing knife or sealing base may be dirty, clean the heat sealing knife or sealing base
If the thermal insulation pad or thermal insulation sticker of the sealing base is damaged, the thermal insulation pad or thermal insulation sticker can be replaced
If the sealing time is too short, the sealing pressure will disappear before the sealing line is completely combined, and the sealing time can be adjusted longer.