The surface of packaged goods are wrinkled or damaged after shrinking via the heat shrinking machine.
Possible reasons:
  • Wrinkle/The temperature of the shrinking machine is insufficient or the speed of the conveyor belt is too fast.
  • Damage /The temperature of the shrinking machine is too high or the speed of the conveyor belt is too slow.
  • Adjust the temperature of the shrinking machine.
  • Adjust the speed of the conveyor belt to be slow if wrinkled after shrinking or adjust to be faster speed if damaged.
After placing the item, the L-type sealing is not tight that causes damage to packaged goods after shrinking.
Possible reasons:
  • The sealing blade has Insufficient preheating or stain.
  • The rubber gasket of the sealing blade shifts or does not have the heat protection sticker.
  • Insufficient space is preserved for film space before and after photocell installation.
  • The film is fastened and installed Incompletely.
  • After preheating, test and clean the sealing blade.
  • Fasten the rubber gasket and put on a heat protection sticker.
  • Preserve film space before and after the retesting.
  • Re-install and fatten the film again.
The shrink film is torn and broken when the machine starts
Possible reasons:
  • Misplacement of feed holder for shrinkable film device.
  • Measure half the distance of the height of top and bottom triangular exploders according to the production dimension. Place the shrinkable film in the distance at the right side of the bracer.
“Tail” condition appears after shrinking the corners of the package.
Possible reasons:
  • The press strip next to the conveyor belt of the sealing arm is not adjusted by product size.
  • Adjust the press strip to proper position according to product size.
How does the “shrinking principles” after heating the heat-shrinkable film apply?
For the average plastic film, the macromolecule chain of the chemical structure is naturally curved and generally does not shrink under heating.
The shrinkable film is different because its finished film undergoes the following process:
the raw material is melted under specified temperature and the thin film is “stretched” under external force, so that the macromolecules could not slide while the unnatural state gets frozen. At room temperature, macromolecule in the plastic film shows poor activity and could not eliminate such an unnatural state by relying on molecular motion, and this is the reason that heat-shrinkable film not shrinking at room temperature.
How do you choose “heat-shrinkable film”?
Please confirm the following when selecting the heat-shrinkable film:
  • Which tool is used with the heat-shrinkable film?
  • What is the dimension and weight of the product?
  • What is the temperature resistance of products? We will help you find a more precise and suitable heat-shrinkable film.
After you confirm the above, it will be easier for you to find the most suitable heat-shrinkable film.