Food packaging products and methods
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.
1. A packaging structure comprising:
a core layer which 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;
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 packaging structure.
2. The packaging structure of claim 1 , wherein the at least one cap layer comprises post-consumer resin.
3. The packaging structure of claim 2 , wherein the at least one cap layer further comprises a polyolefin.
4. The packaging structure of claim 1 , wherein the at least one cap layer is a first cap layer and a second cap layer, wherein the polyethyleneimine coating is disposed on the second cap layer.
5. The packaging structure of claim 4 , wherein the first cap layer is disposed on an interior of the packaging structure.
6. The packaging structure of claim 4 , wherein the first cap layer is a food contact layer.
7. The packaging structure of claim 4 , wherein the first cap layer and the second cap layer are formed of the same material.
8. The packaging structure of claim 1 , wherein the polyolefin is selected from the group consisting of polypropylene, post-consumer resin polypropylene, and high-density polyethylene post-consumer resin.
9. The packaging structure of claim 1 , wherein the core layer further comprises blue-white color concentrate.
10. The packaging structure of claim 1 , wherein the packaging structure comprises a tray of multiple containers.
11. The packaging structure of claim 1 , wherein the core layer and the at least one cap layer are co-extruded.
12. The packaging structure of claim 1 , wherein the at least one cap layer provides barrier properties.
13. A formable sheet comprising:
a core layer comprising:
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;
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.
14. The formable sheet of claim 13 , wherein the at least one cap layer comprises post-consumer resin.
15. The formable sheet of claim 13 , wherein the at least one cap layer comprises a blue-white color concentrate.
16. The formable sheet of claim 13 , wherein the core layer further comprises blue-white color concentrate.
17. The formable sheet of claim 13 , wherein the at least one cap layer is a first cap layer and a second cap layer wherein the polyethyleneimine coating is disposed on the second cap layer.
18. The formable sheet of claim 17 , wherein the first cap layer comprises m-xylenediamine.
19. The formable sheet of claim 17 , wherein the first cap layer is a food contact layer.
20. A packaging comprising multiple portion control containers formed from a packaging structure comprising:
a core layer comprising:
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;
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 packaging structure.