In one embodiment, an insulating microwave packaging material (200) includes a microwave interactive material substrate (205) joined to a second substrate (210) along bond lines (212) to define closed cells (214). Upon impingement of the insulating microwave packaging material (200) by microwave ene
In one embodiment, an insulating microwave packaging material (200) includes a microwave interactive material substrate (205) joined to a second substrate (210) along bond lines (212) to define closed cells (214). Upon impingement of the insulating microwave packaging material (200) by microwave energy in a microwave oven, the closed cells (214) expand to form insulating pockets (216). One side of the insulating pocket (216) bulges and lofts above the opposite side. When a food product is situated on the insulating microwave packaging material (200), the insulating pockets (216) insulate the food product from the microwave oven environment.
대표청구항▼
1. A microwave packaging material comprising: a susceptor film comprising microwave energy interactive material supported on a first polymer film;a support layer joined to the microwave energy interactive material, wherein the support layer comprises moisture; anda second polymer film joined to the
1. A microwave packaging material comprising: a susceptor film comprising microwave energy interactive material supported on a first polymer film;a support layer joined to the microwave energy interactive material, wherein the support layer comprises moisture; anda second polymer film joined to the support layer such that the support layer is positioned between the microwave energy interactive material and the second polymer film, the second polymer film being selectively joined to the support layer to define at least one closed cell between the support layer and the second polymer film layer, wherein the closed cell is operative for inflating in response to sufficient exposure to microwave energy. 2. The microwave packaging material of claim 1, wherein at least one of the first polymer film and the second polymer film comprises biaxially-oriented polyester. 3. The microwave packaging material of claim 1, wherein the first polymer film and the second polymer film each independently comprise biaxially-oriented polyester. 4. The microwave packaging material of claim 1, wherein the first polymer film comprises biaxially-oriented polyester and the second polymer film comprises amorphous polyester. 5. The microwave packaging material of claim 1, wherein the support layer comprises a material selected from the group consisting of paper, paperboard, and a polymer film. 6. The microwave packaging material of claim 1, wherein the closed cell comprises moisture. 7. The microwave packaging material of claim 1, wherein the microwave energy interactive material comprises a lossy substance. 8. The microwave packaging material of claim 1, wherein the microwave energy interactive material is operative for converting microwave radiation into heat in a microwave oven. 9. The microwave packaging material of claim 1, wherein the microwave energy interactive material comprises a conductor, semi-conductor, ferromagnetic material, or dielectric material. 10. The microwave packaging material of claim 1, wherein the microwave energy interactive material is selected from the group consisting of aluminum, iron, nickel, copper, silver, carbon, stainless steel, nichrome, magnetite, zinc, tin, iron, tungsten and titanium. 11. The microwave packaging material of claim 1, wherein the microwave energy interactive material comprises a powder, flake, or fine particle. 12. The microwave packaging material of claim 1, wherein the microwave energy interactive material is configured as a layer of microwave energy interactive material. 13. The microwave packaging material of claim 1, wherein the layer of microwave energy interactive material includes at least one microwave energy inactive area. 14. The microwave packaging material of claim 13, wherein the second polymer film is selectively joined to the support by an adhesive, andthe microwave energy inactive area is disposed proximate to the adhesive. 15. The microwave packaging material of claim 13, wherein the microwave energy inactive area remains cool to the touch after exposure to microwave energy. 16. The microwave packaging material of claim 1, wherein the second polymer film is selectively joined to the support by thermal bonding. 17. The microwave packaging material of claim 1, wherein the second polymer film is selectively joined to the support by adhesive. 18. The microwave packaging material of claim 1, comprising at least a portion of a pouch. 19. The microwave packaging material of claim 1, comprising only a portion of a pouch. 20. The microwave packaging material of claim 1, comprising at least a portion of a microwave heating construct. 21. A microwave packaging material configured to at least partially define a package including an interior space for receiving food, the packaging material comprising: a layer of microwave energy interactive material supported on a first polymer film, wherein the microwave energy interactive material is operative for converting microwave energy into heat;a support layer joined to the microwave energy interactive material, wherein the support layer comprises moisture; anda second polymer film joined to the support layer so that the support layer is positioned between the layer of microwave energy interactive material and the second polymer film,wherein the second polymer film is partially joined to the support layer to define closed cells between the support layer and the second polymer film layer, andthe closed cells inflate when sufficiently exposed to microwave energy. 22. The microwave packaging material of claim 21, wherein the microwave packaging material is configured so that the first polymer film faces the interior space of the package. 23. The microwave packaging material of claim 22, wherein when the closed cells inflate, the layer of microwave energy interactive material supported on the first polymer film and the moisture-containing support layer bulge towards the interior space of the package. 24. The microwave packaging material of claim 21, wherein at least one of the first polymer film and the second polymer film comprises biaxially-oriented polyester. 25. The microwave packaging material of claim 21, wherein the support layer comprises at least one of paper, paperboard, and a polymer film. 26. The microwave packaging material of claim 21, wherein the closed cell comprises moisture. 27. The microwave packaging material of claim 21, wherein the layer of microwave energy interactive material includes at least one microwave energy transparent area. 28. The microwave packaging material of claim 21, wherein the microwave energy transparent area comprises the microwave energy interactive material in a deactivated condition. 29. The microwave packaging material of claim 21, in combination with a food item, wherein the food item is in the interior space of the package. 30. A microwave heating package having an interior space, in combination with a food item, wherein the food item is disposed within the interior space, the microwave heating package comprising: a layer of microwave energy interactive material supported on a first polymer film, wherein the first polymer film is facing the interior space;a moisture-containing support layer joined to the microwave energy interactive material, wherein the support layer comprises at least one of paper, paperboard, and a polymer film; anda second polymer film joined to the support layer so that the support layer is positioned between the layer of microwave energy interactive material and the second polymer film,wherein the second polymer film is partially joined to the support layer to define closed cells between the support layer and the second polymer film layer, andthe closed cells inflate when sufficiently exposed to microwave energy, so that the layer of microwave energy interactive material supported on the first polymer film and the moisture-containing support layer are urged towards the food item within the interior space.
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