FP - Seal Defects (Nonbonding/Weak)

Classification 

A critical defect.

Identification 

The sealing films fail to weld (combine) during the sealing process. This defect appears as a very faint sealing bar impression on the retort pouch seal.

Causes 

  1. The seal area was contaminated.
  2. The sealing bar settings were not correct (i.e the pressure/temperature/dwell time).