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Reasons and solutions for bag warping after heat sealing of bag making machine
In the process of using the bag making machine , there are sometimes some situations, one of which is that the bag is warped after the bag making machine is heat sealed. So what is the cause of this, and how to solve it? Please see below:
Several reasons for the warping of the bag after heat sealing of the bag making machine:
(1) The heat sealing temperature is too high or the heat sealing time is too long;
(2) The thickness of the composite film is inconsistent, which is one of the reasons for the warpage of the bag after heat sealing of the bag making machine;
(3) in the longitudinal heat sealing knife part, the running track of the composite film is not straight;
(4) insufficient cooling;
(5) Insufficient ripening time can also cause this phenomenon to occur.
(6) The surface substrate film has poor heat resistance;
(7) The tension matching of the composite substrate during the compounding process of the bag making machine is improperly controlled, resulting in residual stress after the ripening and setting, especially when the thickness of the composite film is thin.
Solution for bag warping after heat sealing of bag making machine:
(1) Adjusting the tension of the floating roller;
(2) using an inner sealing substrate having a low temperature heat sealability;
(3) adjusting the heat sealing temperature of the bag making machine to a suitable temperature;
(4) sufficient cooling can reduce the phenomenon of warping of the bag after heat sealing of the bag making machine;
(5) Fully matured;
(6) reselecting the surface substrate film;
(7) Adjust the tension of each part of the composite processing equipment, and try to make the recombination rates of the two composite substrates equal.