Problem: The shrink film surface becomes blurred or misty, creating a whitish haze.

Solutions:

• Reduce the shrink tunnel temperature, as excessively high temperature may cause film atomization.
• Increase the conveyor speed of the shrink tunnel to reduce heating contact time.

Problem: Small shrink holes appear on the film surface.

Solutions:

• Reduce the shrink tunnel temperature, as excessively high temperature may cause the film to atomize and break.
• Increase the conveyor speed of the shrink tunnel to reduce heating contact time.

Problem: The sealing line is easy to damage, or small holes appear along the seal.

Solutions:

• Lower the temperature of the sealing blade.
• Adjust the sealing line height to the middle of the product or package height.
• If the sealing blade frame pressure is uneven, adjust the horizontal position of the frame.
• If the heating blade and sealing base are dirty, clean both parts.

Problem: Fisheye-like wrinkles appear on the shrink film surface.

Solutions:

• If the shrink tunnel temperature is too low, increase the temperature.
• If the conveyor speed is too fast, reduce the speed.
• If the circulation air volume of the shrink tunnel is too low, increase the circulation air volume.

Problem: Continuous fine wrinkles appear around corners and edges of the shrink film.

Solutions:

• If there are too many ventilation holes and air escapes too quickly, reduce the number of holes to allow full shrinkage.
• If the conveyor speed is too fast, reduce the speed.
• If the shrink tunnel temperature is too low, increase the temperature.
• If the circulating air of the shrink packaging machine is too low, increase the circulating air volume.

Problem: Triangular protrusions appear at the package corners, commonly known as dog ears.

Solutions:

• If the plastic bag is too large, use a smaller bag.
• If the conveyor speed is too fast, reduce the speed.
• If the circulation air volume is too high, reduce the air volume.
• If the shrink tunnel temperature is too low, increase the temperature.

Problem: The sealing line position is located around the middle of the package height instead of the correct top or bottom position.

Solutions:

• If the sealing conveyor height is incorrect, adjust it to a suitable position.
• If the sealing frame height is incorrect, adjust it to a suitable position.
• If the circulation air direction is incorrect, adjust the air direction.
• If the bag size is too large, use a smaller bag.