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US 2007/0184220 A1Published application
Biodegradable paper-based laminate with oxygen and moisture barrier properties and method for making biodegradable paper-based laminate
AssigneeInternational Paper Company
InventorsChristopher Cleveland, Tricia Reighard, James Marchman
Life of this patent
Estimating the term…
Abstract
Biodegradable laminates including biodegradable polymers have oxygen and moisture barrier properties. The oxygen and moisture barrier layers are biodegradable. If the barrier layers have poor adhesion, degradable tie layers can be included to improve adhesion. Combination of laminate structures can be formed to increase the overall oxygen and moisture barrier characteristics. The biodegradable laminates can be formed by extrusion.
Claims73
A laminate with oxygen barrier properties, comprising:
- a substrate having an outside surface and an inside surface;
- a polymeric protectant layer disposed on said outside surface of said substrate for protecting said substrate from liquid and vapor water surrounding the laminate;
- a moisture protective layer disposed on said inside surface of said substrate for blocking moisture from said substrate and an exterior environment;
- one of an oxygen barrier layer and a degradable tie layer being disposed on said moisture protective layer, said oxygen barrier layer being present when said moisture protective layer is not an oxygen barrier, said degradable tie layer for increasing adhesion and being present when said moisture protective layer is an oxygen barrier;
- and
- a product contact layer for preventing penetration by vapor, liquid, and solid contents disposed on said oxygen barrier layer or said degradable tie layer.
3 more elements
A laminate with oxygen barrier properties, comprising:
- a substrate having an outside surface and an inside surface;
- a first degradable polyolefin layer disposed on said outside surface of said substrate;
- a moisture protectant layer disposed on said inside surface of said substrate including a biodegradable polymer selected from the group consisting of polyester, polyvinyl alcohol, polyhydroxyalkanoate, and polylactic acid;
- a degradable tie layer disposed on said moisture protectant layer;
- and
- a second degradable polyolefin layer disposed on said degradable tie layer.
3 more elements
A laminate with oxygen barrier properties, comprising:
- a substrate having an outside surface and an inside surface;
- a polymeric protectant layer disposed on said outside surface of said substrate and including a polymer selected from the group consisting of polyhydroxyalkanoate and polylactic acid;
- a biodegradable polyester layer disposed on said inside surface of said substrate;
- and
- a product contact layer for resisting penetration disposed on said biodegradable polyester layer and including a polymer selected from the group consisting of polyhydroxyalkanoate and polylactic acid.
2 more elements
A laminate with oxygen barrier properties, comprising:
- a substrate having an outside surface and an inside surface;
- a first biodegradable polyester layer disposed on said outside surface of said substrate;
- a moisture protectant layer disposed on said inside surface of said substrate including a biodegradable polymer selected from the group consisting of a polyhydroxyalkanoate and polylactic acid;
- a degradable tie layer disposed on said moisture protectant layer;
- and
- a second biodegradable polyester layer disposed on said degradable tie layer.
3 more elements
A laminate with oxygen barrier properties, comprising:
- a substrate having an outside surface and an inside surface;
- a polymeric protectant layer disposed on said outside surface of said substrate and including a polymer selected from the group consisting of polyhydroxyalkanoate and polylactic acid;
- a polyvinyl alcohol layer disposed on said inside surface of said substrate;
- and
- a product contact layer for resisting penetration disposed on said polyvinyl alcohol layer and including a polymer selected from the group consisting of polyhydroxyalkanoate and polylactic acid.
2 more elements
A laminate with oxygen barrier properties, comprising:
- a substrate having an outside surface and an inside surface;
- a first degradable polyolefin layer disposed on said outside surface of said substrate;
- a moisture protectant layer disposed on said inside surface of said substrate and including a biodegradable polymer selected from the group consisting of polyhydroxyalkanoate, polylactic acid, and polyester;
- a first degradable tie layer disposed on said moisture protectant layer;
- a second degradable polyolefin layer disposed on said first degradable tie layer;
- a third degradable polyolefin layer disposed on said second degradable polyolefin layer;
- a second degradable tie layer disposed on said third degradable polyolefin layer;
- a polyvinyl alcohol layer disposed on said second degradable tie layer;
- a third degradable tie layer disposed on said polyvinyl alcohol layer;
- and
- a second degradable polyolefin layer disposed on said third degradable tie layer.
8 more elements
A laminate with oxygen barrier properties, comprising:
- a substrate having an outside surface and an inside surface;
- a first biodegradable polyester layer disposed on said outside surface of said substrate;
- a first moisture protectant layer disposed on said inside surface of said substrate and including a polymer selected from the group consisting of a polyhydroxyalkanoate and polylactic acid;
- a first degradable tie layer disposed on said first moisture protectant layer;
- a second biodegradable polyester layer disposed on said first degradable tie layer;
- a third biodegradable polyester layer disposed on said second biodegradable polyester layer;
- a second degradable tie layer disposed on said third biodegradable polyester layer;
- a second oxygen barrier layer disposed on said second degradable tie layer and including a biodegradable polymer selected from the group consisting of polyvinyl alcohol, a polyhydroxyalkanoate, polylactic acid, and biodegradable polyester;
- a third degradable tie layer disposed on said second moisture protectant layer;
- and
- a fourth polyester layer disposed on said third degradable tie layer.
8 more elements
A laminate with oxygen barrier properties, comprising:
- a substrate having an outside surface and an inside surface;
- a polymeric protectant layer disposed on said outside surface of said substrate and including a polymer selected from the group consisting of polyhydroxyalkanoate and polylactic acid;
- a first polyvinyl alcohol layer disposed on said inside surface of said substrate;
- a moisture protectant layer disposed on said first polyvinyl alcohol layer and including a biodegradable polymer selected from the group consisting of a polyhydroxyalkanoate and polylactic acid;
- a second polyvinyl alcohol layer disposed on said moisture protectant layer;
- and
- a product contact layer disposed on said second polyvinyl alcohol layer and including a polymer selected from the group consisting of polyhydroxyalkanoate and polylactic acid.
4 more elements
A laminate with oxygen barrier properties, comprising:
- a substrate having an outside surface and an inside surface;
- a first degradable polyolefin layer disposed on said surface of said substrate;
- a polymeric protectant layer disposed on said inside surface of said substrate and including a polymer selected from the group consisting of polyhydroxyalkanoate and polylactic acid;
- a first polyvinyl alcohol layer disposed on said polymeric protectant layer;
- a first degradable tie layer disposed on said first polyvinyl alcohol layer;
- a second degradable polyolefin layer disposed on said first degradable tie layer;
- a second degradable tie layer disposed on said second degradable polyolefin layer;
- a second polyvinyl alcohol layer disposed on said second degradable tie layer;
- a third degradable tie layer disposed on said second polyvinyl alcohol layer;
- and
- a third degradable polyolefin layer disposed on said third degradable tie layer.
8 more elements
A laminate with oxygen barrier properties, comprising:
- a substrate having an outside surface and an inside surface;
- a first degradable polyolefin layer disposed on said outside surface of said substrate;
- a polyvinyl alcohol layer disposed on said inside surface of said substrate;
- a first degradable tie layer disposed on said polyvinyl alcohol layer;
- a second degradable polyolefin layer disposed on said first degradable tie layer;
- a third degradable polyolefin layer disposed on said second degradable polyolefin layer;
- a second degradable tie layer disposed on said third degradable polyolefin layer;
- a moisture protectant layer disposed on said inside surface of said substrate including a biodegradable polyester selected from the group consisting of polyvinyl alcohol, a polyhydroxyalkanoate, and polylactic acid;
- a third degradable tie layer disposed on said moisture protectant layer;
- and
- a fourth degradable polyolefin layer disposed on said third degradable tie layer.
8 more elements
A laminate for forming moisture barriers, comprising:
- a substrate having an interior surface for contacting products;
- and
- a moisture protectant layer disposed on said interior surface of said substrate and including a degradable polymer selected from the group consisting of a degradable polyolefin, a polyhydroxyalkanoate, and polylactic acid, and polyester.
A laminate for forming moisture barriers, comprising:
- a substrate having an interior surface for contacting products and an exterior surface;
- and
- a first moisture protectant layer disposed on said interior surface of said substrate and including a degradable polymer selected from the group consisting of a degradable polyolefin, a polyhydroxyalkanoate, and polylactic acid, and polyester;
- and
- a second moisture protectant layer disposed on said exterior surface of said substrate and including a degradable polymer selected from the group consisting of a degradable polyolefin, a polyhydroxyalkanoate, polylactic acid, and polyester.
2 more elements
A method for making biodegradable paper products with barrier properties, which comprises:
- providing a substrate having a surface;
- and
- extruding a barrier layer onto said surface of said substrate, said barrier layer including a degradable material selected from the group consisting of polylactic acid and a polyhydroxyalkonoate.
Dependencies are inferred from the claim text.