Food packaging products and methods
AssigneeSonoco Development, Inc.
InventorRichard Schwarz
Life of this patent
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Abstract
In an embodiment, the invention comprises a packaging structure or formable sheet comprising a first layer which comprises post-consumer resin and, in some embodiments, a polyolefin; a second layer adjacent the first layer which comprises: post-consumer resin polyethylene terephthalate; a polyolefin; ethylene methyl acrylate; and ethylene/methyl acrylate/glycidyl methacrylate terpolymer; and in some embodiments, polypropylene maleic anhydride copolymer; and a third layer adjacent the second layer which comprises post-consumer resin and, in some embodiments, a polyolefin.
Claims20
A packaging structure comprising:
- a first cap layer;
- a core layer disposed adjacent the first cap layer, wherein the core layer comprises:
- polyethylene terephthalate;
- a polyolefin;
- ethylene methyl acrylate;
- polypropylene maleic anhydride copolymer;
- at least one polyamide produced from m-xylenediamine;
- and
- ethylene/methyl acrylate/glycidyl methacrylate terpolymer;
- a second cap layer disposed adjacent the core layer, opposite the first cap layer;
- and
- a polyethyleneimine coating disposed on the second cap layer, defining an exterior of the packaging structure.
A packaging structure comprising:
- a first cap layer;
- a core layer disposed adjacent the first cap layer, wherein the core layer comprises:
- post-consumer resin polyethylene terephthalate;
- a polyolefin;
- ethylene methyl acrylate;
- polypropylene maleic anhydride copolymer;
- at least one polyamide produced from m-xylenediamine;
- and
- ethylene/methyl acrylate/glycidyl methacrylate terpolymer;
- a second cap layer disposed adjacent the core layer, opposite the first cap layer.
A formable sheet comprising:
- a core layer comprising:
- polyethylene terephthalate;
- a polyolefin;
- ethylene methyl acrylate;
- polypropylene maleic anhydride copolymer;
- at least one polyamide produced from m-xylenediamine;
- and
- ethylene/methyl acrylate/glycidyl methacrylate terpolymer;
- at least one cap layer disposed adjacent the core layer;
- and
- a polyethyleneimine coating disposed on one of the at least one cap layer defining an exterior of the formable sheet.
A packaging comprising multiple portion control containers formed from a packaging structure comprising:
- a core layer comprising:
- polyethylene terephthalate;
- a polyolefin;
- ethylene methyl acrylate;
- polypropylene maleic anhydride copolymer;
- at least one polyamide produced from m-xylenediamine;
- and
- ethylene/methyl acrylate/glycidyl methacrylate terpolymer;
- and
- at least one cap layer disposed adjacent the core layer.
Dependencies are inferred from the claim text.