Patent ID: 9193513
Filing Date: 2015-11-24
Classification: B32B,B65D

Abstract:
1. A tabbed sealing member for sealing to a rim of a container, the tabbed sealing member comprising: a lower laminate including a bottom heat sealable layer configured for heat sealing the tabbed sealing member to the rim of the container; an upper laminate at least partially bonded to the lower laminate to form a gripping tab defined within a perimeter of the lower laminate; a heat-activated bonding layer forming the at least partial bond between the upper laminate and the lower laminate; a foamed polymer layer in the upper laminate above the heat-activated bonding layer and forming part of the gripping tab, the foamed polymer layer in the upper laminate arranged and configured to permit heating therethrough sufficient to activate the heat-activated bonding layer below it for bonding the upper laminate to the lower laminate, and the foamed polymer layer in the upper laminate effective to retain heat in the lower laminate sufficient to form a bond between the bottom heat sealable layer and the container rim so that the tabbed sealing member can be removed from the container in one piece; wherein the foamed polymer layer in the upper laminate has a density of about 0.4 to about 0.9 g/cc and a rupture strength of less than about 3200 g/in; and wherein a layer of oriented polyolefin is between the heat-activated bonding layer and the foamed polymer layer in the upper laminate, the layer of oriented polyolefin forming part of the gripping tab.