Causes of Wrinkling in Vacuum Plastic Packaging:
Non-uniform thickness of the base material of the vacuum plastic packaging, with a significant difference between thin and thick areas.
The base material of the vacuum plastic packaging is wound unevenly.
Excessive or insufficient adhesive application can lead to interlayer slippage, and uneven adhesive application can cause localized wrinkles.
Insufficient adhesive drying, excessive residual solvents, low adhesive strength, causing displacement between the two laminated base materials.
The composite film is not properly cooled or not adequately cooled before winding, and high-temperature, flexible composite film is prone to wrinkling.
Improper composite pressure settings.
Inadequate tension control, with inconsistent or mismatched tensions during unwinding and rewinding.
Misalignment of various guide rods.
Unclean surfaces of various guides, with foreign particles or uneven surfaces on guide wheels, such as dents, scratches, and impacts.