EP0344839A1 - Matière d'emballage active bifonctionnelle pour produits alimentaires pour micro-ondes - Google Patents

Matière d'emballage active bifonctionnelle pour produits alimentaires pour micro-ondes Download PDF

Info

Publication number
EP0344839A1
EP0344839A1 EP89201319A EP89201319A EP0344839A1 EP 0344839 A1 EP0344839 A1 EP 0344839A1 EP 89201319 A EP89201319 A EP 89201319A EP 89201319 A EP89201319 A EP 89201319A EP 0344839 A1 EP0344839 A1 EP 0344839A1
Authority
EP
European Patent Office
Prior art keywords
microwave
laminate
metal layer
temperature
laminate according
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.)
Withdrawn
Application number
EP89201319A
Other languages
German (de)
English (en)
Inventor
Peter Gatenby Turner
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.)
Greif International Holding BV
Original Assignee
Koninklijke Emballage Industrie Van Leer BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koninklijke Emballage Industrie Van Leer BV filed Critical Koninklijke Emballage Industrie Van Leer BV
Publication of EP0344839A1 publication Critical patent/EP0344839A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • 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
    • B65D2581/3447—Heat attenuators, blocking agents or heat insulators for temperature control
    • 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
    • B65D2581/3454—Microwave reactive layer having a specified optical density
    • 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
    • B65D2581/3471—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
    • B65D2581/3471—Microwave reactive substances present in the packaging material
    • B65D2581/3477—Iron or compounds thereof
    • B65D2581/3478—Stainless steel
    • 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
    • B65D2581/3487—Reflection, Absorption and Transmission [RAT] properties of the microwave reactive package

Definitions

  • This invention relates to a new class of microwave active materials, which can be used in suitable configurations to improve the cooking of many foods in microwave ovens by generating crisping and browning conditions on the surface.
  • a laminate is made from a lightly metallised heat resistant plastic film bonded to a supporting structural layer of paper or paperboard.
  • the metallisation thickness usually expressed as optical density (OD) or sheet resistance (ohms per square) is controlled to such a level as to maximise microwave absorption to provide rapid heating of the resultant laminate in a microwave oven. Because of this very rapidly heating laminate surface the outside of the food product will be heated rapidly. On the other hand materials with good absorbing properties will transfer a part of the microwaves so that simultaneously also the inside of the food product is heated by the microwaves. This heating of the inner food product will cause migration of fluids to the outside of the food product, which prevents the desired forming of a brown grispy crust at the outside of the food product.
  • the material of this invention offers a major advance over existing susceptor materials which are used in the microwave food industry by operating in a dual or bi-functional mode.
  • the material of this invention is metallised to a greater thickness so that the layer is totally opaque to microwave radiation (although not necessarily totally opaque to the much shorter wavelength visible electromagnetic radiation), yet not so thick that it loses all absorption properties.
  • the invention provides a bi-functional laminate which in a microwave oven converts irreversibly, after a time and at a temperature controlled by the components of the laminate, from a microwave screen with absorbing properties to a microwave transparent material with much weaker absorbing properties; said laminate being constructed from - a plastic film selected for its compatibility for food contact and for its softening temperature which determines the changeover conversion temperature; - a metal layer vacuum deposited on the plastic layer, the metal being deposited to just sufficient thickness to provide a complete screen to microwave transmission at room temperature (transmission less than 1%); - an adhesive and - a paper or paper-board supporting material of a weight selected to give the required heat-up time to the changeover conversion temperature, said supporting material being adhered to said metal layer.
  • the preferred embodiment of this invention provides initially a total screening of the food contents from microwave radiation.
  • the food product is heated only on its outer surface by contact with or thermal radiation from the heating box.
  • the crisping action on the surface of the food starts without microwave heating of the inside of the food product.
  • the material of the box construction reaches the aforesaid elevated temperate, it spontaneously converts to a material having quite different interactive properties with microwaves. Instead of acting as a screen for microwaves, it acts as a transparent window to microwaves yet retains just sufficient absorbing power to maintain its elevated temperature.
  • the hot surface of the material continues to heat the surface of the food product maintaining the conditions necessary to promote browning and crisping, and simultaneously the microwaves can penetrate into and will be absorbed by the food product to rapidly warm or cook the whole food product.
  • the heat generated by microwave absorption in the metal creates thermally induced stresses in the laminate structure due to high thermal gradients and differences in thermal expansion of metal, plastic substrate, and adhesive layers. Below the transition temperature, the solid nature of the component contain these stresses. But at a characteristic temperature determined by the materials of construction, the material softens and can no longer withstand the thermal stresses.
  • Thermal distortion occurs on a micro-scale which causes the very thin and mechanically weak metal layer to break. This breaks the electrical continuity on the scale significant to microwave wavelengths and destroys the reflective properties.
  • the transmission, reflection (and by calculation the absorption) properties of thin metal coatings were measured by passing microwaves through a film sample mounted in a wave-guide and, using a network analyser, observing the forward and reflected powers on the two sides of the material.
  • the film samples were embodied as schematically illustrated in Figure 1 and consisted of a layer 1 representing a plastic film selected for compatibility with food stuffs and a layer 2 representing the metal film layer. Using a range of metallised films of different thickness, the relationships shown in the graphs in Figures 2 to 6 were found.
  • the figures 2, 3 and 4 are more specifically related to aluminium coatings.
  • the absorption shows a maximum of about 50% of the incident radiation with transmission and reflection more or less equally sharing the remaining 50%.
  • This is the material preferred by those skilled in the art for generating a hot-plate surface for crisping an browning products for microwave cooking.
  • the transmission of the microwaves has fallen to zero, and the material is predominantly a reflector of microwaves, yet still absorbs between 10 and 20 percent of incident microwave radiation.
  • the reflection increases to approach 100% with a consequent reduction in microwave absorption and microwave heating.
  • Figure 4 illustrates the transmission (T), absorption (A) and reflection (R) of microwave energy for vacuum deposited aluminium coatings as function of the sheet conductivity.
  • the conductivity is along the horizontal axes expressed on a logarithmic scale.
  • the metallised coating required for this invention is that showing the properties of the 0.6 OD aluminium metallized films, or the 0,4 OD stainless steel metallized films, i.e. films with a microwave transmission at 2.45 GHZ of less than 1% and a microwave absorption between 10 and 20%.
  • the coatings optimally have a sheet of resistance of 10 - 20 ⁇ / ⁇ , whether aluminium or some alternative metal or alloy.
  • the material of the invention which is used in a preferred closed or open-ended box configuration, comprises a laminate of metallised plastic film adhesive bonded to a paper or paper-­board. Such a laminate is illustrated in Figure 7.
  • layer 3 represents a plastic film selected for compatibility for contact with food stuffs and for its softening point.
  • Table 1 lists plastics commonly used in food packaging and their softening temperatures.
  • the thickness may be any thickness compatible with its use, typically in the range 5 to 100 microns.
  • a preferred material is biaxially oriented polyester film 12 of microns thick.
  • Layer 4 in figure 7 represents the metal layer applied by vacuum deposition techniques - evaporation or sputtering - to the plastic film 3 to a controlled thickness to give the required microwave screening properties.
  • Different metals require different thicknesses due to their differing electrical properties.
  • the metal can be any corrosion resistant metal or alloy compatible with use in food packaging, e.g. aluminium, stainless, steel or titanium.
  • the thickness required for aluminium would have a sheet resistance of about 15 ⁇ / ⁇ ,i.e. signifcantly higher than the coatings described by Seiferth (0.4 - 8 ⁇ / ⁇ ).
  • optical density of such an aluminium coating is around 0.6 which is signficantly higher than the 0.2 to 0.3 used in the simpler hot-place type of mono-functional materials representing the known art.
  • Layer 5 represents the adhesive which is selected for its compatibility for food packaging application. This layer 5 provides the bond to layer 6, a paper or paper-board which serves both to provide structural stiffness to the laminate and final configuration, and to moderate in a controlling manner the heat-up rate of the laminate when exposed to microwave radiation. Where the laminate is not in direct thermal contact with the food-stuff in use, then the heat-up rate is controlled primarily in inverse proportion to the thermal mass of the supporting paper-board.
  • Figure 8 illustrates several possible configurations of the shaped material, an essentially closed structure being necessary to achieve effective initial screening of the product.
  • a laminate was made by adhesively bonding a 12 ⁇ m polyester film, metallised with an aluminium coating to an optical density of 0.6 and showing zero microwave transmission, to a 240 gram per square meter paper-board.
  • a rectangle of this laminate was folded into a 4-sided open-­ ended sleeve (similar to Figure 8 (a)) which allowed an easy fit for a sausage roll.
  • Four microwave insensitive temperature sensing probes were attached to the sleeve and product.
  • Probe 1 was positioned beneath the sausage roll attached to the inward-facing plastic film surface of the open box.
  • Probe 2 was attached to the upper inner surface of the box.
  • Probe 3 was inserted into the sausage meat filling.
  • Probe 4 was inserted just below the skin of the outer crust of the sausage roll.
  • the positions of the four probes are schematically illustrated in Figure 9.
  • the enclosure, formed of the laminate according to the invention is referred by number 10
  • the food product is indicated by 11 and comprises a crust 11a and a filling 11b. Furthermore the four probes are indicated as such.
  • the temperature changes are shown in schematically Figure 10.
  • the two different functions carried out by the laminate according to the invention are clearly seen from these curves.
  • three different stages are distinguished, indicated by I, II and III.
  • stage I the product is screened from microwaves and no heating of the filling occurs.
  • Probe 3 does not measure any temperature increase.
  • the surface of the laminate (probe 2) heats up relatively rapidly to a high temperature which with the used laminate was in excess of 200°C. Because the surface of the laminate forms a relatively large heat sink, the surface of the laminate which is in contact with the food product was heated up, however, significantly less rapid than those parts of the surface which were not in contact with the food product. This is indicated by the temperature increase measured by probe 1.
  • probe 4 indicated that also the free parts of the crust surface will start warming up.
  • the material of the pack When the material of the pack reaches its ultimate temperature (in this example ⁇ 200°C), it converts to a microwave transparent material which simultaneously has weak absorbing properties. Therefore the temperature of the laminate will not rise further, but will be stabilized at the obtained value.
  • the reaching of the maximum temperature marks furthermore the beginning of the second stage, indicated by II.
  • the sausage meat filling starts to rise in temperature as appears from the values supplied by probe 3, whereas also the temperature of the crust (measurement values supplied by said probes 1 and 4) continues to rise. Because at every moment the crust is hotter than the filling the crust will show a tendency to lose water so that the crust will become crispy and flake.
  • the temperature will stabilize as result of the relatively large water content within the filling. From that moment on in fact the last stage begins, which stage is indicated by III in figure 10.
  • the cooking process can be ended within this stage, preferably at a time selected by the user at which time the crust has obtained its desired appearence, in other words when the outer crust has obtained its desired crispness and browning.
  • the microwave oven is switched off and the cooked food stuff can be taken out of the oven.
EP89201319A 1988-06-01 1989-05-22 Matière d'emballage active bifonctionnelle pour produits alimentaires pour micro-ondes Withdrawn EP0344839A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8801407A NL8801407A (nl) 1988-06-01 1988-06-01 Bifunctioneel actief verpakkingsmateriaal voor met microgolven te behandelen voedselprodukten.
NL8801407 1988-06-01

Publications (1)

Publication Number Publication Date
EP0344839A1 true EP0344839A1 (fr) 1989-12-06

Family

ID=19852388

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89201319A Withdrawn EP0344839A1 (fr) 1988-06-01 1989-05-22 Matière d'emballage active bifonctionnelle pour produits alimentaires pour micro-ondes

Country Status (2)

Country Link
EP (1) EP0344839A1 (fr)
NL (1) NL8801407A (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU614853B2 (en) * 1988-07-13 1991-09-12 Societe Des Produits Nestle S.A. Composite sheet stock for microwave heating and receptacle
EP0563235A1 (fr) * 1990-12-20 1993-10-06 The Pillsbury Company Structure sensible aux micro-ondes et regulee en temperature
EP0563053A1 (fr) * 1990-12-20 1993-10-06 Pillsbury Co Structure bilaterale sensible aux micro-ondes.
US6188055B1 (en) * 1996-12-03 2001-02-13 Advanced Deposition Technologies, Inc. Micromesh heating material and food packages made therefrom
US7112771B2 (en) 2004-03-09 2006-09-26 Ball Corporation Microwavable metallic container
US7378625B2 (en) 2004-03-09 2008-05-27 Ball Corporation Microwavable metallic container
US8080770B2 (en) 2004-03-09 2011-12-20 Ball Corporation Microwavable metallic container

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0000797A1 (fr) * 1977-08-04 1979-02-21 THE PROCTER & GAMBLE COMPANY Modérateur pour énergie à micro-ondes
FR2451182A1 (fr) * 1979-03-16 1980-10-10 Seiferth Oscar Recipient pour aliments destine a la cuisson par micro-ondes, et emballage pour aliments
US4230924A (en) * 1978-10-12 1980-10-28 General Mills, Inc. Method and material for prepackaging food to achieve microwave browning
EP0242952A2 (fr) * 1986-02-21 1987-10-28 E.I. Du Pont De Nemours And Company Matériau composite contenant des matériaux sensibles aux micro-ondes
EP0245005A2 (fr) * 1986-05-07 1987-11-11 International Paper Company Plateau en carton pour aliments pouvant aller au four
US4713510A (en) * 1986-06-25 1987-12-15 International Paper Co. Package for microwave cooking with controlled thermal effects

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0000797A1 (fr) * 1977-08-04 1979-02-21 THE PROCTER & GAMBLE COMPANY Modérateur pour énergie à micro-ondes
US4230924A (en) * 1978-10-12 1980-10-28 General Mills, Inc. Method and material for prepackaging food to achieve microwave browning
FR2451182A1 (fr) * 1979-03-16 1980-10-10 Seiferth Oscar Recipient pour aliments destine a la cuisson par micro-ondes, et emballage pour aliments
EP0242952A2 (fr) * 1986-02-21 1987-10-28 E.I. Du Pont De Nemours And Company Matériau composite contenant des matériaux sensibles aux micro-ondes
EP0245005A2 (fr) * 1986-05-07 1987-11-11 International Paper Company Plateau en carton pour aliments pouvant aller au four
US4713510A (en) * 1986-06-25 1987-12-15 International Paper Co. Package for microwave cooking with controlled thermal effects
EP0251445A2 (fr) * 1986-06-25 1988-01-07 International Paper Company Emballage pour cuisson au four à micro-ondes avec effets thermiques contrôlés

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU614853B2 (en) * 1988-07-13 1991-09-12 Societe Des Produits Nestle S.A. Composite sheet stock for microwave heating and receptacle
EP0563235A1 (fr) * 1990-12-20 1993-10-06 The Pillsbury Company Structure sensible aux micro-ondes et regulee en temperature
EP0563053A1 (fr) * 1990-12-20 1993-10-06 Pillsbury Co Structure bilaterale sensible aux micro-ondes.
EP0563235A4 (en) * 1990-12-20 1994-10-19 Pillsbury Co Temperature controlled susceptor structure
US5571627A (en) * 1990-12-20 1996-11-05 The Pillsbury Company Temperature controlled susceptor structure
EP0563053B1 (fr) * 1990-12-20 1997-07-30 The Pillsbury Company Structure bilaterale sensible aux micro-ondes ayant deux couches chauvant
US6188055B1 (en) * 1996-12-03 2001-02-13 Advanced Deposition Technologies, Inc. Micromesh heating material and food packages made therefrom
US7112771B2 (en) 2004-03-09 2006-09-26 Ball Corporation Microwavable metallic container
US7378625B2 (en) 2004-03-09 2008-05-27 Ball Corporation Microwavable metallic container
US7812292B2 (en) 2004-03-09 2010-10-12 Ball Corporation Microwavable metallic container
US8080770B2 (en) 2004-03-09 2011-12-20 Ball Corporation Microwavable metallic container

Also Published As

Publication number Publication date
NL8801407A (nl) 1990-01-02

Similar Documents

Publication Publication Date Title
US4713510A (en) Package for microwave cooking with controlled thermal effects
US7601408B2 (en) Microwave susceptor with fluid absorbent structure
CA1333493C (fr) Methode de controle du chauffage interactif par micro-ondes utilisant la desactivation d'elements configures
US4851632A (en) Insulated frame package for microwave cooking
US5164562A (en) Composite susceptor packaging material
US5177332A (en) Microwave energy susceptible conformable laminate packaging materials
US4230924A (en) Method and material for prepackaging food to achieve microwave browning
US5910268A (en) Microwave packaging structures
US5260537A (en) Microwave heating structure
CA2601087C (fr) Emballage souple interactif microonde
US4948932A (en) Apertured microwave reactive package
US5021293A (en) Composite material containing microwave susceptor material
US5221419A (en) Method for forming laminate for microwave oven package
CA1281007C (fr) Emballage pour cuisson aux micro-ondes
AU637863B2 (en) Surface heating food wrap with variable microwave transmission
US4985606A (en) Multi-ply film susceptor for microwave cooking
US4935252A (en) Microwave oven preparation of waffle
CA1316992C (fr) Materiaux interactifs a couche metallisee sur papier pour chauffage au four micro-ondes
EP1920637A1 (fr) Capteur d'energie micro-ondes comprenant un polyester thermostabilise
JP2014516458A (ja) 冷凍された液体及び他の物品のためのマイクロ波加熱用構造体
EP0344839A1 (fr) Matière d'emballage active bifonctionnelle pour produits alimentaires pour micro-ondes
JPH0257337A (ja) マイクロ波エネルギー感受性相似被覆性積層包装材料
CA1304046C (fr) Emballage ferme d'une couche d'acier inoxydable reagissant aux micro-ondes et methode de fabrication
Bohrer et al. Packaging techniques for microwaveable foods
JP2721876B2 (ja) マイクロ波調理用容器

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE FR GB NL

17P Request for examination filed

Effective date: 19900507

17Q First examination report despatched

Effective date: 19920831

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19931201