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After a foil-lined cap is tightened onto the plastic jug, the container travels along a conveyor and passes beneath an induction sealing head. Seconds later, removing the cap reveals a foil membrane firmly bonded across the opening.
The sealing head generates a rapidly alternating electromagnetic field that induces electrical currents within the aluminum foil. The resulting heat activates a polymer sealing layer on the foil, which bonds to the container’s rim as it passes through the machine.
Induction sealing is widely used because it creates a secure barrier without the heating equipment physically touching the container. The finished seal can help prevent leaks, provide visible evidence of opening, and protect the contents during storage and transportation.
2026-08-22 09:36