I believe that many Plastic Bag Supplier will encounter this situation more or less. After packaging the products with High quality Plastic Bag, the whole surface of the packaging surface is curled, the bag is twisted and deformed, and the packaging is uneven. The main causes of these problems are caused. What are we going to do?
First of all, the main reasons for packaging curling, deformation, etc.: 1. The surface substrate film has poor heat resistance; 2. The tension matching of the composite substrate during the compounding process is improperly controlled, resulting in residual stress after curing. Especially when the thickness of the composite film is thin, such failure is more likely to occur; 3. The thickness of the composite film is inconsistent; 4, insufficient cooling; 5, the curing time is not enough; 6, in the longitudinal heat sealing knife part, the running track of the composite film is not straight; 7, the heat sealing temperature is too high or the heat sealing time is too long;
Then, since we already know the reason, we should make corresponding adjustments to avoid unnecessary losses. The following are some of the methods we have summarized: 1. Re-select the surface substrate film, remember not to choose the bottom. 2. Adjust the tension of each part of the composite processing equipment, try to make the recombination rate of the two composite substrates equal; 3, adjust the tension of the floating roller when compounding, to achieve the same thickness; 4, adequate cooling; Fully mature, but it can not make the material too mature or it will easily cause adhesion. This degree must be mastered. 6. Use an inner sealing substrate with low temperature heat sealing property; 7 Adjust the heat sealing temperature to a suitable temperature.
Follow Us
