5. Discount question
Scene: Wrinkles on the film after product packaging.
Factors:
(1) The heat sealing temperature is too high, and the film receives too much heat, resulting in a shortened upper film.
(2) When the machine is shut down, the upper film stays in the heat sealing plate for a long time, and the film receives most heat, resulting in a shortened film.
(3) There are wrinkles on the film before heat sealing.
(4) There may be foreign objects or scratches on the heat sealing plate.
(5) The heat sealing gasket is uneven.
Solution:
(1) Lower the heat sealing temperature, reduce the heat received by the upper film, and shorten the upper film.
(2) To ensure the continuous operation and production of the membrane, reduce the number of starts and stops to reduce the problem of excessive heating of the upper membrane during shutdown, and prevent wrinkles caused by excessive shortening and deformation of the upper membrane during heating.
(3) Before heat sealing, there are wrinkles on the film. If the film is applied, please control the quality of the product during the production process to prevent wrinkles; If there are wrinkles before stretching under the film, please control the quality of the product during the production process to prevent wrinkles; If there are wrinkles in the lower film during the stretching process, it indicates that the lower film is subjected to excessive heat during the stretching process, resulting in a decrease in stretching temperature, stretching preheating time, and stretching forming time; Perhaps the lower film is due to foreign objects or injuries on the stretching heating plate. Remove the foreign objects and repair the heating plate.
(4) Remove foreign objects from the heat sealing plate and repair it.
(5) Repair the heat sealing gasket to ensure that it is flat and there are no gaps together.

6. Flatness
Scene: The product is bent and wrinkled
Factors:
(1) Unreasonable planning of upper and lower membranes.
(2) The tension between the upper and lower membranes does not match.
(3) The sterilization method is not good.
(4) The shape and depth of the forming mold do not match.
(5) Blank spaces are not heat sealed.
Solution:
(1) Plan the upper and lower membranes into symmetrical structures to reduce stress effects between different structures.
(2) The tension control of the upper and lower membranes should be well matched, and under the condition of ensuring a flat membrane, the tension should be controlled as low as possible to prevent uneven tension and the formation of a single membrane with high tension. After sterilization, the membrane should bend towards the direction of the membrane with high tension.
(3) During the sterilization process, the products should be placed neatly and should not be kneaded with each other, otherwise it may appear as folded, bent, wrinkled, and other phenomena.
(4) The stretching formed mold should be as similar as possible to the shape of the product, with a depth slightly deeper than the thickness of the product, in order to reduce the bending, wrinkling and other issues caused by the stress effect of the film stretching.
(5) Request that the blank space also be heat sealed to increase the strength between the upper and lower membranes and resist membrane stress.

Article organization: Sealing glue manufacturers www.hshangli.com