Summary
A reliable seal comes from the interaction of film, temperature, pressure and dwell time. Changes in line speed or thickness can shift that balance.
What happened?
Powder, oil or product particles in the seal area increase leak risk. Filler-nozzle design and clean sealing jaws are part of the solution.
Key details
Leak testing and routine seal checks should be defined for the product. Food-contact and destination-market requirements also need valid supplier documentation.