This is a wet type glue sealable liner. The cold adhesively sealing liner also has multi structures, but the most commonly used is - Backing or carrier material - Bonding layer - Aluminum foil - Paper
The aluminum foil is extrusion laminated or adhesively laminated or adhesively laminated paper. The process of application of this liner is:
Wet glue is applied on the mouth of the container.
The cap with the wad fitted (either by gluing or by holding in place by reinforcing crease) is screwed on to the container.
The paper layer bonds permanently to the rim of the container after a time span. On opening the container the weak bonding layer releases the laminate and the carrier material, thus providing a hermetically sealed container and the carrier material remains in the cap as a secondary seal.
The options provided for structuring an integral safety seal are : Carrier material: Board ( Duplex - food grade pulp ) / EPE.