RPC - Seal Defects (Uneven Impression)

Classification 

  • A major defect

Identification 

This is a defect that may lead to an out-of-specification seal.

Causes 

  1. Pneumatic pressure was not evenly distributed to sealing areas of the sealing head.
  2. The plastic container was misaligned.
  3. There are irregularities in sealing head or anvil surfaces.