B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
B65D 65/38 (2006.01) B32B 7/12 (2006.01) B32B 15/08 (2006.01) B65D 75/58 (2006.01) G03C 3/00 (2006.01)
Patent
CA 2093170
ABSTRACT OF THE DISCLOSURE A packaging material has a laminated structure 10 composed of a first layer 12 comprising oriented polypropylene, a second layer 14 comprising a polyether urethane adhesive material, a third layer 16 comprising aluminum foil or a flexible thermoplastic membrane resin material with a metallic membrane material, and a fourth layer 18 comprising a resin extrudate material. The oriented polypropylene provides linear tear characteristics that enables the package 22,24 to tear continuously along a defined line. The second layer 14 provides an adhesive lamination between the first 12 and third layer 16. An aluminum foil layer provides moisture and light barrier protection. In the fourth layer 18, ethylene copolymer resin is bonded to the aluminum foil layer and imparts heat seal characteristics required for package fabrication. In a alternative embodiment, a primer material layer 20 is provided to bolster the adhesion between one or more of the various layers 12,14,16,18 of the laminate structure 10. The package 22,24 formed from the material of the invention has superior tear continuation, toughness and penetration resistance properties.
Light Susan L.
Peterson Gary D.
Stachowski Edmund B.
Eastman Kodak Company
Gowling Lafleur Henderson Llp
Light Susan L.
Peterson Gary D.
Stachowski Edmund B.
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