CA2615365A1 - Microwave packaging with indentation patterns - Google Patents

Microwave packaging with indentation patterns Download PDF

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Publication number
CA2615365A1
CA2615365A1 CA002615365A CA2615365A CA2615365A1 CA 2615365 A1 CA2615365 A1 CA 2615365A1 CA 002615365 A CA002615365 A CA 002615365A CA 2615365 A CA2615365 A CA 2615365A CA 2615365 A1 CA2615365 A1 CA 2615365A1
Authority
CA
Canada
Prior art keywords
millimeters
microwave
packaging material
material according
indentations
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002615365A
Other languages
French (fr)
Other versions
CA2615365C (en
Inventor
Sandra M. Tsontzidis
Laurence M. C. Lai
Neilson Zeng
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Graphic Packaging International LLC
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Individual
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Filing date
Publication date
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Publication of CA2615365A1 publication Critical patent/CA2615365A1/en
Application granted granted Critical
Publication of CA2615365C publication Critical patent/CA2615365C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
    • B65D81/3446—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
    • B65D81/3446—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
    • B65D81/3453—Rigid containers, e.g. trays, bottles, boxes, cups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
    • B65D81/3446—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
    • B65D81/3461—Flexible containers, e.g. bags, pouches, envelopes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2581/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D2581/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within
    • B65D2581/3401—Cooking or heating method specially adapted to the contents of the package
    • B65D2581/3402—Cooking or heating method specially adapted to the contents of the package characterised by the type of product to be heated or cooked
    • B65D2581/3405—Cooking bakery products
    • B65D2581/3406—Pizza or bread
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2581/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D2581/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within
    • B65D2581/3437—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within specially adapted to be heated by microwaves
    • B65D2581/3439—Means for affecting the heating or cooking properties
    • B65D2581/344—Geometry or shape factors influencing the microwave heating properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2581/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D2581/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within
    • B65D2581/3437—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within specially adapted to be heated by microwaves
    • B65D2581/3439—Means for affecting the heating or cooking properties
    • B65D2581/3455—Packages having means for improving the internal circulation of air
    • B65D2581/3456—Means for holding the contents at a distance from the base of the package, e.g. raised islands or protrusions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2581/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D2581/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within
    • B65D2581/3437—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within specially adapted to be heated by microwaves
    • B65D2581/3463—Means for applying microwave reactive material to the package
    • B65D2581/3466—Microwave reactive material applied by vacuum, sputter or vapor deposition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2581/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D2581/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within
    • B65D2581/3437—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within specially adapted to be heated by microwaves
    • B65D2581/3463—Means for applying microwave reactive material to the package
    • B65D2581/3467—Microwave reactive layer shaped by delamination, demetallizing or embossing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2581/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D2581/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within
    • B65D2581/3437—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within specially adapted to be heated by microwaves
    • B65D2581/3471—Microwave reactive substances present in the packaging material
    • B65D2581/3472—Aluminium or compounds thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2581/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D2581/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within
    • B65D2581/3437—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within specially adapted to be heated by microwaves
    • B65D2581/3486—Dielectric characteristics of microwave reactive packaging
    • B65D2581/3494—Microwave susceptor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S99/00—Foods and beverages: apparatus
    • Y10S99/14—Induction heating

Abstract

Indentation patterns in microwave packaging materials can enhance the baking and browning effects of the microwave packaging materials on food. The indentation patterns can provide venting to either channel moisture from one area of the food product to another, trap moisture in a certain area to prevent it from escaping, or channel the moisture completely away from the food product. The indentation patterns can cause the microwave packaging material underneath a food product to be slightly elevated above the cooking platform in the base of a microwave. The indentation patterns can lessen the heat sinking effect of the cooking platform by providing an air gap for insulation. Elevating the base of the microwave packaging material further allows more incident microwave radiation to propagate underneath the microwave packaging material to be absorbed by the food product or by microwave interactive materials in the microwave packaging material that augment the heating process.

Claims (32)

1. A microwave packaging material comprising:
a laminate material including a substrate and a microwave interactive material layer supported upon the substrate; and a plurality of indentations in the laminate material, wherein the indentations are at least partially defined by the microwave interactive layer and substantially maintain the integrity of the microwave interactive layer;
a first side of the microwave interactive layer faces away from the substrate and includes a plurality of substantially flat, coplanar surfaces that are at least partially separated from one another respectively by the indentations;
each of the indentations is respectively positioned between at least two of the substantially flat, coplanar surfaces of the first side of the microwave interactive layer;
in a plan view of the first side of the microwave interactive layer, a summation of all areas of the first side that are in the form of the substantially flat, coplanar surfaces exceeds a summation of all areas of the first side that are in the form of the indentations;
for each of the indentations (a) the indentation includes a convex portion defined by the first side of the microwave interactive layer, and (b) the convex portion extends above the substantially flat, coplanar surfaces of the first side of the microwave interactive layer while the substantially flat, coplanar surfaces are facing upward;
a first side of the substrate faces away from the microwave interactive layer and includes a plurality of substantially flat, coplanar surfaces that are at least partially separated from one another respectively by the indentations;
a thickness is defined between (a) the substantially flat, coplanar surfaces of the first side of the microwave interactive layer, and (b) the substantially flat, coplanar surfaces of the first side of the substrate;

for each of the indentations, the convex portion extends a maximum distance above the substantially flat, coplanar surfaces of the first side of the microwave interactive layer; and the maximum distance is less than the thickness.
2. The microwave packaging material according to claim 1, wherein the indentations are not fold lines.
3. The microwave packaging material according to claim 1, wherein the microwave interactive layer includes a susceptor film.
4. The microwave packaging material according to claim 1, wherein the microwave interactive layer includes an abuse-tolerant metallic pattern.
5. The microwave packaging material according to claim 1, wherein none of the indentations is contiguous with a peripheral edge of the laminate material.
6. The microwave packaging material according to claim 1, wherein the substrate comprises paperboard.
7. The microwave packaging material according to claim 1, wherein the maximum distance is in a range of about 0.3 millimeters to about 8 millimeters.
8. The microwave packaging material according to claim 7, wherein the maximum distance is in a range of about 0.5 millimeters to about 8 millimeters.
9. The microwave packaging material according to claim 8, wherein the maximum distance is about 0.5 millimeters.
10. The microwave packaging material according to claim 7, wherein the maximum distance is in a range of about 1 millimeter to about 8 millimeters.
11. The microwave packaging material according to claim 10, wherein the maximum distance is about 3 millimeters.
12. The microwave packaging material according to claim 7, wherein for each of the indentations, the convex portion has a width, and the width is in a range of about 3 millimeters to about 5 millimeters.
13. The microwave packaging material according to claim 1, wherein for each of the indentations, the convex portion has a width, and the width is about 2 millimeters.
14. The microwave packaging material according to claim 1, wherein for each of the indentations, the convex portion has a width, and the width is in a range of about 3 millimeters to about 5 millimeters.
15. The microwave packaging material according to claim 14, wherein the width is about 5 millimeters.
16. The microwave packaging material according to claim 1, wherein the thickness is within at least one range selected from the group consisting of a range of about 0.508 millimeters to about 1.635 millimeters, and a range of about 0.254 millimeters to about 1.27 millimeters.
17. The microwave packaging material according to claim 7, wherein the thickness is within at least one range selected from the group consisting of:
a range of about 0.508 millimeters to about 1.635 millimeters, and a range of about 0.254 millimeters to about 1.27 millimeters.
18. The microwave packaging material according to claim 7, wherein the thickness is within the range of about 0.508 millimeters to about 1.635 millimeters.
19. The microwave packaging material according to claim 7, wherein the thickness is within the range of about 0.254 millimeters to about 1.27 millimeters.
20. The microwave packaging material according to claim 19, wherein the thickness is about 1 millimeter.
21. The microwave packaging material according to claim 19, wherein the thickness is about 0.8 millimeters.
22. The microwave packaging material according to claim 1, wherein for each of the indentations, the indentation is round.
23. The microwave packaging material according to claim 22, wherein the round indentions are discontiguous with the peripheral edge of the laminate material.
24. The microwave packaging material according to claim 1, wherein for each of the indentations, the indentation is elongate.
25. The microwave packaging material according to claim 24, wherein the elongate indentions extend radially toward a peripheral edge of the laminate material.
26. The microwave packaging material according to claim 25, wherein the elongate indentions are discontiguous with the peripheral edge of the laminate material.
27. A microwave packaging material comprising:
a laminate material including a substrate and a microwave interactive material layer supported upon the substrate; and a plurality of indentations in the laminate material, wherein the indentations are at least partially defined by the microwave interactive layer and substantially maintain the integrity of the microwave interactive layer.
28. The microwave packaging material according to claim 27, wherein:
a first side of the microwave interactive layer faces away from the substrate and includes a plurality of substantially flat, coplanar surfaces that are at least partially separated from one another respectively by the indentations;
for each of the indentations (a) the indentation includes a convex portion defined by the first side of the microwave interactive layer, and (b) the convex portion extends above the substantially flat, coplanar surfaces of the first side of the microwave interactive layer while the substantially flat, coplanar surfaces are facing upward;
a first side of the substrate faces away from the microwave interactive layer and includes a plurality of substantially flat, coplanar surfaces that are at least partially separated from one another respectively by the indentations;
a thickness is defined between (a) the substantially flat, coplanar surfaces of the first side of the microwave interactive layer, and (b) the substantially flat, coplanar surfaces of the first side of the substrate;
for each of the indentations, the convex portion extends a maximum distance above the substantially flat, coplanar surfaces of the first side of the microwave interactive layer; and the maximum distance is less than the thickness.
29. The microwave packaging material according to claim 28, wherein the maximum distance, which the convex portion extends above the substantially flat, coplanar surfaces of the first side of the microwave interactive layer, is in a range of about 0.3 millimeters to about 8 millimeters.
30. The microwave packaging material according to claim 28, wherein for each of the indentations, the convex portion has a width, and the width is about 2 millimeters.
31. The microwave packaging material according to claim 28, wherein for each of the indentations, the convex portion has a width, and the width is in a range of about 3 millimeters to about 5 millimeters.
32. The microwave packaging material according to claim 28, wherein the thickness is within at least one range selected from the group consisting of:
a range of about 0.508 millimeters to about 1.635 millimeters, and a range of about 0.254 millimeters to about 1.27 millimeters.
CA2615365A 2005-07-15 2006-07-12 Microwave packaging with indentation patterns Active CA2615365C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US11/183,053 2005-07-15
US11/183,053 US7319213B2 (en) 2001-11-07 2005-07-15 Microwave packaging with indentation patterns
PCT/US2006/027043 WO2007011605A1 (en) 2005-07-15 2006-07-12 Microwave packaging with indentation patterns

Publications (2)

Publication Number Publication Date
CA2615365A1 true CA2615365A1 (en) 2007-01-25
CA2615365C CA2615365C (en) 2010-09-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2615365A Active CA2615365C (en) 2005-07-15 2006-07-12 Microwave packaging with indentation patterns

Country Status (4)

Country Link
US (1) US7319213B2 (en)
EP (1) EP1919797A1 (en)
CA (1) CA2615365C (en)
WO (1) WO2007011605A1 (en)

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CA2615365C (en) 2010-09-14
EP1919797A1 (en) 2008-05-14

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