Fracture film for peelable membrane containers
The invention comprises a fracture film for sealing a peelable membrane to a container comprising a first layer of high density polyethelene, a second layer of polybutene-1/ethylene-vinyl acetate, wherein the second layer is bonded to the first layer, and a third layer of ethylene-acrylic acid, wherein the third layer is bonded to the second layer.
1 . A container comprising:
a flexible membrane lid comprising:
one or more adjacent layers comprising metal foil, polymer film, metalized polymer film or paper; and
a fracture film adhered to the one or more adjacent layers comprising:
a stiff polymeric layer;
a fracture layer comprising a polymeric blend; and
a sealing layer, wherein the fracture layer cohesively bonds the stiff layer and the sealing layer; and
a container end which comprises a metal, wherein the sealing layer is sealed to the container end, wherein the fracture layer is configured to fracture internally upon peeling of the flexible membrane lid away from the end of the container.
2 . The container of claim 1 , wherein the stiff polymeric layer of the fracture film comprises high density polyethylene.
3 . The container of claim 1 , wherein the fracture layer of the fracture film comprises a blend of polybutene-1/ethylene-vinyl acetate.
4 . The container of claim 1 , wherein the fracture film is configured to separate at the fracture layer such that a first portion of the fracture layer is bonded with the stiff polymeric layer, and a second portion of the fracture layer is bonded with the sealing layer.
5 . The container of claim 1 , wherein upon peeling of the flexible membrane away from the container, a footprint of the fracture film remains on the metal end.
6 . The container of claim 5 wherein the footprint is one of a segment of the sealing layer, the sealing layer, the sealing layer and a portion of the fracture layer, or the sealing layer and the fracture layer.
7 . The container of claim 1 , wherein the one or more adjacent layers includes a first layer comprising polyethylene terephthalate; a second layer comprising foil adhered to the first layer; and a third layer comprising nylon adhered to the second layer.
8 . The flexible membrane of claim 1 , wherein the weight of ethylene-vinyl acetate in the fracture layer is up to twice the weight of polybutene-1 in the fracture layer.