The induction sealing process invloves an induction current being applied to a metal liner in a plastic cap. The bottle is first filled, then the cap is applied. The cap already has the liner inside. The liner contains the sealing material adhered to a foil layer. The induction current heats the foil liner, melting the sealant. The pressure of the threaded cap upon the bottle provides the required pressure. As the sealing layer cools, it adheres to the bottle.

What is induction cap sealing?

Induction sealing is a method of hermetically sealing rigid containers to provide tamper evidence, preserve freshness, deter pilferage and prevent leakage while providing product integrity.

Why seal?

1. Tamper Evidence - Deter Pilferage

2. Leak Prevention

3. Increased Shelf Life - Product Freshness

Where any of the above conditions are preferred and/or mandated, we can supply the right induction sealer to fulfill your requirement. Qualified APS personnel are always available to answer questions about induction sealing. Pillar has a fully functional lab to run your samples for inspection.

How does it work?

In most applications, packagers purchase induction foil lined caps from a cap supplier. Cap styles of all varieties are available from these suppliers. After filling and capping, the container passes under an induction coil which emits a varying electromagnetic field and the conductive aluminum foil liner begins to heat. The polymer film on the liner also heats and flows onto the lip of the container. When cooled, the polymer creates a bond with the container resulting in a sealed product.