Induction Cap Sealers

Induction Cap Sealers help prevent leaks, preserve freshness and provide tamper evidence.  Induction sealing, otherwise known as induction cap sealing, is a non-contact method of heating a metallic disk to hermetically seal the top of plastic and glass containers.  This sealing process takes place after the container has been filled and capped. Sealing can be done with either a hand held induction cap sealers or fully automatic induction sealers mounted on a conveyor system.

The cap is typically supplied with foil liner already inserted. Although there are various liners to choose from, a typical induction liner is multi-layered. The top layer is a paper pulp that is generally spot-glued to the cap. The next layer is wax that is used to bond a layer of aluminum foil to the pulp. The bottom layer is a polymer film laminated to the foil. After the cap or closure is applied, the container passes under an induction sealer coil, which emits an oscillating electromagnetic field.  As the bottle passes under the induction cap sealer coil (sealing head) the conductive aluminum foil liner begins to heat. The heat melts the wax, which is absorbed into the pulp backing and releases the foil from the cap. The polymer film also heats and flows onto the lip of the container. When cooled, the polymer creates a bond with the  bottle resulting in a hermetically sealed product. Neither the bottle nor its contents are affected, and this all happens in a matter of seconds.

Induction cap sealers require proper sizing to determine the exact system necessary to run a particular product.  Call or write us today for information about our induction sealing equipment.