Patent ID: 8057896

Claim:
A pull-tab sealing member, having a top side and a bottom side constructed to be secured to a lip around an opening of a container, to close the container, the pull-tab sealing member comprising: a bottom member comprising a metal foil layer having a bottom surface for facing a container and a top surface on an opposite side thereof, a separate non-foam, heat-distributing polyolefin film layer having a top surface and a bottom surface, the bottom surface adhered to the top surface of the metal foil layer by an adhesive selected from the group consisting of ethylene acrylic acid copolymers, curable two part urethane adhesives, epoxy resins, and mixtures thereof, a lower polymer layer disposed on the bottom surface of the metal foil layer including a heat-activated sealant or adhesive coating for securing the bottom member to the container; the non-foam, heat-distributing polyolefin film layer includes a blend of a first and a second polyolefin component, a density of the second polyolefin component greater than a density of the first polyolefin component, and a density of the non-foam, heat-distributing polyolefin layer from about 0.96 to about 0.99 g/cc; and a top member comprising a top surface and bottom surface, a portion of the top member comprising a tab portion having a top and a bottom surface, the bottom surface of the tab portion not secured to the top surface of the non-foam, heat-distributing polyolefin film layer of the bottom member, and a portion of the bottom surface of the top member secured to the top surface of the non-foam, heat-distributing polyolefin film layer of the bottom member, the top member is secured to the bottom member in a sufficiently strong manner and the non-foam heat distributing polyolefin film layer is of a sufficient thickness so that when the heat-activated sealant or adhesive coating at the bottom surface of the bottom member is secured to a container, the bottom member can be removed by pulling on the tab portion without separating the tab portion from the top member or rupturing the non-foam heat-distributing polyolefin film layer.