Shrink Film Tunnel Temperature Verification Log

Inspection log for verifying shrink tunnel zone temperatures and conveyor speed against the validated process profile to confirm consistent shrink performance and seal appearance.

Inspection Identification

• Inspection date and time recorded
• Line, machine, and tunnel ID identified
• Product SKU or package format identified
• Operator or inspector name recorded
• Reference validated profile or SOP
  Record the validated operating profile, setup sheet, or SOP used for comparison.

Validated Operating Profile

• Validated tunnel zone temperature range available for comparison
  Document the approved temperature setpoints or acceptable ranges for each tunnel zone.
• Validated conveyor speed range available for comparison
  Document the approved conveyor speed or dwell-time range for the product being run.
• Film type confirmed
• Validated profile matches current product and film setup
• Any approved deviations or temporary settings documented
  Use only when a formal deviation, trial, or engineering approval exists.

Actual Process Measurements

• Zone 1 actual temperature
• Zone 2 actual temperature
• Zone 3 actual temperature
• Conveyor speed actual
• Measured settings are within validated profile

Equipment Condition and Shrink Quality

• Tunnel doors, guards, and panels secure
• Airflow, heaters, and sensors operating normally
• Shrink appearance uniform across package
  Assess for wrinkles, loose film, burn marks, distortion, or uneven shrink.
• Seal appearance consistent and acceptable
  Check for seal clarity, integrity, and visual consistency after tunnel pass.
• No product damage, film scorching, or tunnel-related defects observed

Outcome and Corrective Action

• Inspection result
• Corrective action documented for any out-of-range condition
  Record adjustments made to zone temperatures, conveyor speed, airflow, film setup, or maintenance follow-up.
• Recheck completed after adjustment
  Complete after any corrective action to confirm the tunnel returned to the validated profile.