EP1842796A1 - Packaging having a thermoplastic coating for microwave ovens - Google Patents

Packaging having a thermoplastic coating for microwave ovens Download PDF

Info

Publication number
EP1842796A1
EP1842796A1 EP06007293A EP06007293A EP1842796A1 EP 1842796 A1 EP1842796 A1 EP 1842796A1 EP 06007293 A EP06007293 A EP 06007293A EP 06007293 A EP06007293 A EP 06007293A EP 1842796 A1 EP1842796 A1 EP 1842796A1
Authority
EP
European Patent Office
Prior art keywords
packaging according
packaging
valve
inner layer
layers
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Withdrawn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
EP06007293A
Other languages
German (de)
French (fr)
Inventor
Friedrich Kastner
Stefan Zoister
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.)
Mondi AG
Original Assignee
Mondi Packaging AG
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 Mondi Packaging AG filed Critical Mondi Packaging AG
Priority to EP06007293A priority Critical patent/EP1842796A1/en
Publication of EP1842796A1 publication Critical patent/EP1842796A1/en
Withdrawn legal-status Critical Current

Links

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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/22—Details
    • B65D77/225—Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element
    • 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
    • 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
    • B65D2581/3445—Microwave reactive adhesives, e.g. also used in valves or lids
    • 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
    • B65D2581/345—Chemical browning agents or aroma adding agents, e.g. smoked flavour
    • 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
    • B65D2581/3464—Microwave reactive material applied by ink printing
    • 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
    • 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
    • B65D2581/3479—Other metallic compounds, e.g. silver, gold, copper, nickel
    • 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
    • B65D81/3415—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 in hot water, e.g. boil pouches

Definitions

  • the invention relates to food packaging, ready meals, non food products such as cold hot packs, packaged towelettes and the like which are suitable for microwave, oven or water bath use.
  • Packaging is understood to be rigid, semi-rigid or flexible packaging. Such packages tend due to the associated with the heating. Expansion of the content and expansion of air and gases to burst or burst. To a limited extent, this risk can be reduced by using packaging that is significantly larger than the volume of the product. Furthermore, the water present in the product is converted into steam when heated. This steam can not or hardly escape through the usual sealed packaging, so it is not possible crispy heating of ready meals.
  • a package which has a multilayer structure.
  • the outer layer and the inner layer are heat-fusible merge together.
  • a connecting part by which the outer layer is connected to an inner layer by a connecting means and a region where the outer layer is not connected to the inner layer so that a communicating passage having an exit opening to the outer space is formed.
  • the exit opening is provided with an adhesive layer which breaks when a certain pressure in the interior of the package is exceeded. This ensures a certain overpressure in the package when heated in the microwave, and also ensures controlled release of the overpressure above a certain value. Disadvantage of this construction is that the packaging looks visually not appealing, since the recess extending from edge to edge is clearly visible and the valve opens easily even under mechanical pressure.
  • a package of an unopened heatable, in particular microwave heatable material which has at least one sealing region which becomes locally permeable when a certain internal pressure is exceeded, said sealing region has at least one Soll dielassabêt forming a throttle for the package contents, and in the form of a channel-like Passage is formed, and comprises a packaging interior facing the tip, which is preferably sealed.
  • valve construction Disadvantage of this valve construction is that the valve opens easily not only in the case of overpressure induced by heating, but also under mechanical pressure. Furthermore, the passage is not exactly dimensioned. In addition, there is the possibility that migrated during production, autoclaving, sterilization, storage or heating filling material from the package into the valve, the contents presses the valve then prematurely and can escape into the surrounding space of the microwave oven. But there is also the possibility that the valve is clogged by the infiltrated contents and the steam can not escape to the extent necessary.
  • a package which has an absorber for the moisture escaping on heating, which makes a crisper preparation possible. Without a valve, through which excess steam can escape, the absorber is used up too quickly.
  • the object of the invention was to provide a suitable for heating in the microwave, in the oven or in a water bath packaging in the one hand, the construction of a defined pressure and a controlled escape of the steam is possible.
  • the invention therefore relates to a packaging suitable for heating in a microwave oven, in an oven or in a water bath, consisting of a multilayer film material, wherein the film has an outer layer and an inner layer, and the inner layer with the outer layer by means of an adhesive, such as Laminating adhesive is connected to each other, and which has at least one area which is permeable to exceeding an internal pressure generated by the microwave heating and / or increased temperature, characterized in that the inner layer has a thermoplastic coating which can be in any printed form, eg extends as a strip from edge to edge.
  • the valve can only be opened when the package is heated in the microwave, but not at the sole elevated pressure.
  • an additional heat-absorbing coating may be provided in the region of the permeable region (valve).
  • the outer layer preferably consists of a film of plastic, for example polyester, such as oriented PET amorphous PET, polyolefins such as polypropylene, cast-PP, blown, stretched, biaxially oriented PP films, or polyethylene, polystyrene, polycarbonate, cellophane, polyamide, polyvinyl chloride or their copolymers. But it can be coextruded or laminated Plastic composite films or composites are used with paper. Further, it is possible to use coated films, biodegradable films, aluminum foils and the like.
  • the thickness of the outer layer is preferably 6-200 ⁇ m.
  • the inner layer preferably consists of a sealable medium, for example of plastic films of polyolefins, such as polyethylene, polypropylene, EVOH, EVA, and / or its copolymers or terpolymers, polystyrene, polycarbonate, cellophane, polyamide, polyvinyl chloride.
  • the inner layer can also be formed by extrusion coating or painting the outer film with one of the plastics mentioned.
  • the thickness of the inner layer is preferably 0.1-100 ⁇ m.
  • the thermoplastic valve coating may consist of a thermoplastic varnish, for example comprising PU, PMMA, PVA, PE, PP, acrylates, ethylene acrylates, ethylene acrylate, their co- or terpolymers, ionomers, polyester acrylates, styrene acrylates and the like.
  • a thermoplastic varnish for example comprising PU, PMMA, PVA, PE, PP, acrylates, ethylene acrylates, ethylene acrylate, their co- or terpolymers, ionomers, polyester acrylates, styrene acrylates and the like.
  • a protective seal can be provided to protect against unintentional and / or premature opening. Due to the adhesion of the protective seal, the opening pressure of the valve is set when heated. Depending on the requirement, depending on the adhesive force of the protective seal, the required opening pressure can be varied within a wide range. The adhesive force is determined primarily by the shape of the protective seal and the adhesive.
  • a weak spot can be installed in the protective seal to ensure reliable opening of the valve. This can be done for example by a defined limited interruption of the sealing layer or by introducing defined Vorsiegel Kunststoffen or points.
  • the protective seal surrounding the valve can have different shapes. It can be designed in the form of the valve, or even independent of the shape of the valve, for example in the form of a tip, a trapezoid, in the form of line structures, in the form of a grid, in the form of a double point and the like.
  • Intermediate layers may optionally be located between the outer and inner layers.
  • interlayers may include, for example, barrier layers such as alumina layers or silicon oxide layers, organic barrier layers such as polyamide layers, absorber layers, for example gas absorber layers such as O 2 , CO 2 absorber layers, water vapor absorber layers, ethylene absorber layers, printed layers, layers providing increased flexibility or strength or stiffness, and the like be.
  • barrier layers such as alumina layers or silicon oxide layers
  • organic barrier layers such as polyamide layers
  • absorber layers for example gas absorber layers such as O 2 , CO 2 absorber layers, water vapor absorber layers, ethylene absorber layers, printed layers, layers providing increased flexibility or strength or stiffness, and the like be.
  • the entire layer composite of the packaging according to the invention may optionally comprise a plurality of intermediate layers and combinations of these intermediate layers, wherein the layers either each have good adhesion to each other or may be interconnected by adhesive aids such as adhesives.
  • the optionally present in the region of the valve energy-absorbing coating may be present over the entire surface or partially. It can for example be applied to the outer layer. However, it may also be present in the protective seal, or applied to any pre-seal points or areas.
  • the energy absorbing coating may be, for example, a metallic coating. Examples of suitable metallic coatings are Al, Cu, Fe, Ag, Au, Cr, Ni, Zn or their compounds, for example their oxides or alloys. Further, graphite, for example, can be used as an energy absorbing coating.
  • the energy absorbing coating may be a printing with an energy absorbing pigment or particle containing ink.
  • particles and pigments come into question, which come into resonance by the incident microwave radiation and are put into thermal oscillation. These are understood in particular to mean pigments or particles which contain molecular water, such as water glass or zeolites.
  • the coating can be applied by known printing or painting methods, by sputtering, vapor deposition and the like.
  • a feature can be applied around the region of the recess of the inner layer, both on the inner layer and on the outer layer, that a distinct change in the appearance upon opening of the valve.
  • two different colored features can be applied, which form a mixed color in the closed state of the valve. After opening the valve, the two layers are separated, the pure colors appear.
  • provision can be made to provide partial information for proving the opening of the valve on the separating layers, which information is then supplemented after opening to understandable information, for example lettering, for example "open” or "open” and the like. This can be done using auxiliary layers with different adhesive strength.
  • an acoustic opening detection for example a whistling sound, can be generated via the geometry of the valve. When the valve is opened, a tone lip begins to vibrate, which then generates the whistling sound.
  • absorber layers for the in Heating water vapor generated be provided.
  • absorber layers for example, hydrophilic polymers, such as EVA, highly filled with zeolites polymers, silica gel, nonwovens, or tissue have embedded the hydrophilic polymers, zeolite-coated nonwovens or tissue in question.
  • the absorber layer may be applied to the inner layer by printing processes.
  • the absorber layer can also be fixed to the inner layer with a thin sealing layer or membrane.
  • the fixation layer or the membrane may have a predetermined breaking point. When a defined pressure in the package is exceeded, the membrane is stretched and ruptures at the predetermined breaking point, whereby the absorber layer is exposed and the resulting water vapor can be absorbed.
  • such an additional membrane may also contain flavoring substances, for example smoking substances, or the like, which are then released when the defined pressure is exceeded by opening the membrane.
  • flavoring substances for example smoking substances, or the like
  • encapsulated aroma substances can also be introduced in the valve region, which are released when the valve is opened.
  • the tanning layer may consist of a paper composite with a metallized plastic film, such as a polyester film or a polypropylene film.
  • the packaging may be designed in the form of a two- or multi-chamber packaging with different contents, it also being possible for a valve to be provided between the chambers.
  • a meat dish packed in a chamber be in the second chamber a side dish, for example, rice or potatoes or potato preparations and the like.
  • the valve located between the chambers opens and the resulting water vapor can escape into the chamber containing the supplement.
  • the chamber containing the meat dish has a browning film for crunchy cooking of the dish, whereas in the chamber containing the side dish steaming is effected by the water vapor escaping from the secondary chamber.
  • another valve may be provided to the exterior space,
  • connection of the individual layers can be effected by heat seal adhesive or a laminating adhesive or by extrusion laminating.
  • the packaging may have an opening aid, for example a perforation, a tear thread or notches.
  • the packaging may be in the form of a bag, a bag, a stand-up pouch, a tablet, sachet, pouch or in the form of a sealing foil for containers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Wrappers (AREA)

Abstract

The packing consists of multi layer foil material. The foil has an outer and inner layer, which are interconnected by an adhesive like laminated adhesive. The internal layer has a thermoplastic coating, which extends in the form of geometrical structures e.g. as strip from edge to edge. The thermoplastic coating from a thermoplastic paint contains polyurethanes (PU), polymethyl methacrylate (PMMA), poly vinyl acetate (PVA), polyetylene (PE), polypropylene (PP), acrylates, ethyl acrylates, ethyl acrylate, copolymers or terpolymere, Ionomers, polyester acrylates and styrene acrylates. An independent claim is included for foil material for production of packing.

Description

Die Erfindung betrifft eine Verpackung für Lebensmittel, Fertiggerichte, Non Food - Produkte, wie Cold-Hot-Packs, verpackte Erfrischungstücher und dergleichen, die zur Verwendung in der Mikrowelle, im Ofen oder im Wasserbad geeignet ist.The invention relates to food packaging, ready meals, non food products such as cold hot packs, packaged towelettes and the like which are suitable for microwave, oven or water bath use.

Lebensmittel oder Fertiggerichte, die in einer Verpackung erwärmt werden, insbesondere in einem Mikrowellenofen oder einem Ofen oder einem Wasserbad, sind bekannt.
Unter Verpackungen werden starre, halbstarre oder flexible Verpackungen verstanden.
Derartige Verpackungen neigen aufgrund der mit der Erwärmung einhergehenden. Ausdehnung des Inhalts und der Ausdehnung von Luft und Gasen zum Aufplatzen oder Bersten.
In beschränktem Maße kann diese Gefahr durch Verwendung von Verpackungen, die deutlich größer dimensioniert sind als das Volumen des Füllguts, vermindert werden.
Ferner wird das im Füllgut vorhandene Wasser bei der Erwärmung in Dampf umgewandelt. Dieser Dampf kann durch die üblichen versiegelten Verpackungen nicht oder nur schwer entweichen, es ist daher kein knuspriges Erwärmen von Fertiggerichten möglich.Foods or ready meals that are heated in a package, especially in a microwave oven or oven or water bath, are known.
Packaging is understood to be rigid, semi-rigid or flexible packaging.
Such packages tend due to the associated with the heating. Expansion of the content and expansion of air and gases to burst or burst.
To a limited extent, this risk can be reduced by using packaging that is significantly larger than the volume of the product.
Furthermore, the water present in the product is converted into steam when heated. This steam can not or hardly escape through the usual sealed packaging, so it is not possible crispy heating of ready meals.

Aus der EP 661 219 B1 ist eine Verpackung bekannt, die einen mehrlagigen Aufbau aufweist. Dabei sind die Außenlage und die Innenlage wärmefrei miteinander verschmelzbar. Ferner ist ein Verbindungsteil vorgesehen, durch den die Außenschicht mit einer Innenschicht durch ein Verbindungsmittel miteinander verbunden ist und ein Bereich, in dem die Außenschicht nicht mit der Innenschicht verbunden ist, sodass ein kommunizierender Durchgang gebildet wird, der eine Ausgangsöffnung zum Außenraum aufweist.From the EP 661 219 B1 a package is known which has a multilayer structure. The outer layer and the inner layer are heat-fusible merge together. Further, there is provided a connecting part by which the outer layer is connected to an inner layer by a connecting means and a region where the outer layer is not connected to the inner layer so that a communicating passage having an exit opening to the outer space is formed.

An der Innenseite sind Mittel vorgesehen, die den Innenraum mit dem kommunizierenden Durchgang verbinden. Die Ausgangsöffnung ist mit einer Klebeschicht versehen, die bei Überschreiten eines bestimmten Drucks im Innenraum der Verpackung aufbricht.
Dadurch wird ein bestimmter Überdruck in der Verpackung bei der Erwärmung in der Mikrowelle gewährleistet, ferner wird ein kontrolliertes Entweichen des Überdrucks ab einem bestimmten Wert gewährleistet.
Nachteil dieser Konstruktion ist, dass die Verpackung optisch nicht ansprechend aussieht, da die sich von Kante zu Kante erstreckende Ausnehmung deutlich sichtbar ist und das Ventil auch bei mechanischem Druck leicht öffnet.On the inside means are provided which connect the interior with the communicating passage. The exit opening is provided with an adhesive layer which breaks when a certain pressure in the interior of the package is exceeded.
This ensures a certain overpressure in the package when heated in the microwave, and also ensures controlled release of the overpressure above a certain value.
Disadvantage of this construction is that the packaging looks visually not appealing, since the recess extending from edge to edge is clearly visible and the valve opens easily even under mechanical pressure.

Aus der WO 03/051745 A ist eine Verpackung eines ungeöffnet erwärmbaren, insbesondere mikrowellenerhitzbaren Gutes bekannt, die mindestens einen Versiegelungsbereich aufweist, der bei Überschreitung eines bestimmten Innendrucks lokal durchlässig wird, wobei dieser Versiegelungsbereich mindestens einen Solldurchlassabschnitt aufweist, der eine Drossel für den Verpackungsinhalt bildet, und der in Form eines kanalartigen Durchlasses ausgebildet ist, und eine dem Verpackungsinnenraum zugewandte Spitze umfasst, die vorzugsweise umsiegelt ist.From the WO 03/051745 A a package of an unopened heatable, in particular microwave heatable material is known, which has at least one sealing region which becomes locally permeable when a certain internal pressure is exceeded, said sealing region has at least one Solldurchlassabschnitt forming a throttle for the package contents, and in the form of a channel-like Passage is formed, and comprises a packaging interior facing the tip, which is preferably sealed.

Nachteil dieser Ventilkonstruktion ist, dass das Ventil nicht nur bei durch Erwärmung induziertem Überdruck von innen, sondem auch bei mechanischem Druck leicht öffnet. Ferner ist der Durchgangskanal nicht exakt dimensionierbar. Außerdem besteht die Möglichkeit, dass während der Herstellung, Autoklavierung, Sterilisation, Lagerung oder Erwärmung Füllgut aus der Verpackung ins Ventil migriert, das Füllgut drückt das Ventil dann vorzeitig auf und kann in den umgebenden Raum des Mikrowellenofens austreten. Es besteht aber auch die Möglichkeit, dass das Ventil durch das eingedrungene Füllgut verstopft wird und der Dampf nicht im notwendigen Ausmaß entweichen kann.Disadvantage of this valve construction is that the valve opens easily not only in the case of overpressure induced by heating, but also under mechanical pressure. Furthermore, the passage is not exactly dimensioned. In addition, there is the possibility that migrated during production, autoclaving, sterilization, storage or heating filling material from the package into the valve, the contents presses the valve then prematurely and can escape into the surrounding space of the microwave oven. But there is also the possibility that the valve is clogged by the infiltrated contents and the steam can not escape to the extent necessary.

Aus der WO 04/13015 A ist eine Verpackung bekannt, die einen Absorber für die beim Erwärmen entweichende Feuchtigkeit aufweist, wodurch eine knusprigere Zubereitung möglich ist. Ohne Ventil, durch das überschüssiger Dampf entweichen kann, wird der Absorber aber zu schnell aufgebraucht.From the WO 04/13015 A For example, a package is known which has an absorber for the moisture escaping on heating, which makes a crisper preparation possible. Without a valve, through which excess steam can escape, the absorber is used up too quickly.

Aufgabe der Erfindung war es, eine für die Erwärmung in der Mikrowelle, im Ofen oder im Wasserbad geeignete Verpackung bereitzustellen, in der einerseits der Aufbau eines definierten Überdrucks und ein kontrolliertes Entweichen des Dampfes möglich ist.The object of the invention was to provide a suitable for heating in the microwave, in the oven or in a water bath packaging in the one hand, the construction of a defined pressure and a controlled escape of the steam is possible.

Gegenstand der Erfindung ist daher eine zur Erwärmung im Mikrowellenofen, im Ofen oder im Wasserbad geeignete Verpackung, bestehend aus einem mehrlagigen Folienmaterial, wobei die Folie eine äußere Schicht und eine innere Schicht aufweist, und die innere Schicht mit der äußeren Schicht mittels eines Klebemittels, wie Kaschierkleber mit einander verbunden ist, und die mindestens einen Bereich aufweist, der bei Überschreiten eines durch die Mikrowellenerhitzung erzeugten Innendrucks und/oder durch erhöhte Temperatur durchlässig wird, dadurch gekennzeichnet, dass die innere Schicht eine thermoplastische Beschichtung aufweist, die sich als beliebige gedruckte Form, z.B. als Streifen von Kante zu Kante erstreckt.The invention therefore relates to a packaging suitable for heating in a microwave oven, in an oven or in a water bath, consisting of a multilayer film material, wherein the film has an outer layer and an inner layer, and the inner layer with the outer layer by means of an adhesive, such as Laminating adhesive is connected to each other, and which has at least one area which is permeable to exceeding an internal pressure generated by the microwave heating and / or increased temperature, characterized in that the inner layer has a thermoplastic coating which can be in any printed form, eg extends as a strip from edge to edge.

Dadurch kann das Ventil nur bei Erwärmung der Verpackung in der Mikrowelle nicht aber bei alleinigen erhöhten Druck geöffnet werden.As a result, the valve can only be opened when the package is heated in the microwave, but not at the sole elevated pressure.

Gegebenenfalls kann im Bereich des durchlässigen Bereichs (Ventils) eine zusätzliche wärmeabsorbierende Beschichtung vorgesehen sein.If appropriate, an additional heat-absorbing coating may be provided in the region of the permeable region (valve).

Die äußere Schicht besteht vorzugsweise aus einer Folie aus Kunststoff, beispielsweise Polyester, wie orientiertes PET amorphes PET, Polyolefine wie Polypropylen, Cast-PP, geblasenen, gereckte, biaxial gereckte PP-Folien, oder Polyethylen, Polystyrol, Polycarbonat, Zellglas, Polyamid, Polyvinylchlorid oder deren Copolymere. Es können aber coextrudierte oder laminierte Kunststoffverbundfolien oder Verbunde mit Papier verwendet werden. Ferner ist es möglich beschichtete Folien, biologisch abbaubare Folien, Aluminiumfolien und dergleichen zu verwenden. Die Dicke der äußeren Schicht beträgt vorzugsweise 6 - 200 µm.The outer layer preferably consists of a film of plastic, for example polyester, such as oriented PET amorphous PET, polyolefins such as polypropylene, cast-PP, blown, stretched, biaxially oriented PP films, or polyethylene, polystyrene, polycarbonate, cellophane, polyamide, polyvinyl chloride or their copolymers. But it can be coextruded or laminated Plastic composite films or composites are used with paper. Further, it is possible to use coated films, biodegradable films, aluminum foils and the like. The thickness of the outer layer is preferably 6-200 μm.

Die innere Schicht besteht vorzugsweise aus einem siegelfähigen Medium, beispielsweise aus Kunststofffolien aus Polyolefinen, wie Polyethylen, Polypropylen, aus EVOH, EVA, und/oder dessen Copolymeren oder Terpolymeren, Polystyrol, Polycarbonat, Zellglas, Polyamid, Polyvinylchlorid. Die innere Schicht kann aber auch durch eine Extrusionsbeschichtung oder Lackierung der äußeren Folie mit einem der genannten Kunststoffe gebildet werden.
Die Dicke der inneren Schicht beträgt vorzugsweise 0,1 -100 µm.The inner layer preferably consists of a sealable medium, for example of plastic films of polyolefins, such as polyethylene, polypropylene, EVOH, EVA, and / or its copolymers or terpolymers, polystyrene, polycarbonate, cellophane, polyamide, polyvinyl chloride. The inner layer can also be formed by extrusion coating or painting the outer film with one of the plastics mentioned.
The thickness of the inner layer is preferably 0.1-100 μm.

Die thermoplastische Ventilbeschichtung kann aus einem thermoplastischen Lack, beispielsweise enthaltend PU, PMMA, PVA, PE, PP, Acrylate, Ethylenacrylaten, Ethylenacrylat deren Co- oder Ter- polymeren, lonomeren, Polyesteracrylaten, Styrolacrylaten und dergleichen.The thermoplastic valve coating may consist of a thermoplastic varnish, for example comprising PU, PMMA, PVA, PE, PP, acrylates, ethylene acrylates, ethylene acrylate, their co- or terpolymers, ionomers, polyester acrylates, styrene acrylates and the like.

Im Bereich des Ventils kann eine Schutzsiegelung zum Schutz vor unbeabsichtigtem und/oder vorzeitigem Öffnen vorgesehen sein. Durch die Haftung der Schutzsiegelung wird der Öffnungsdruck des Ventils bei Erwärmung eingestellt. Je nach Erfordernis kann dabei je nach Haftkraft der Schutzsiegelung der erforderliche Öffnungsdruck in einem weiten Bereich variiert werden. Dabei wird die Haftkraft in erster Linie durch die Form der Schutzsiegelung und das Haftmittel bestimmt.In the area of the valve, a protective seal can be provided to protect against unintentional and / or premature opening. Due to the adhesion of the protective seal, the opening pressure of the valve is set when heated. Depending on the requirement, depending on the adhesive force of the protective seal, the required opening pressure can be varied within a wide range. The adhesive force is determined primarily by the shape of the protective seal and the adhesive.

Gegebenenfalls kann in der Schutzsiegelung eine Schwachstelle eingebaut werden, um ein verlässliches Öffnen des Ventils sicherzustellen. Dies kann beispielsweise durch eine definierte begrenzte Unterbrechung der Siegelschicht oder durch Einbringen von definierten Vorsiegelbereichen oder -punkten erfolgen.If necessary, a weak spot can be installed in the protective seal to ensure reliable opening of the valve. This can be done for example by a defined limited interruption of the sealing layer or by introducing defined Vorsiegelbereichen or points.

Die das Ventil umgebende Schutzsiegelung kann dabei unterschiedliche Formen aufweisen. Sie kann in Form des Ventils ausgeführt sein, oder auch unabhängig von der Form des Ventils beispielsweise in Form einer Spitze, eines Trapezes, in Form von Linienstrukturen, in Form eines Rasters, in Form eines Doppelspitzes und dergleichen.The protective seal surrounding the valve can have different shapes. It can be designed in the form of the valve, or even independent of the shape of the valve, for example in the form of a tip, a trapezoid, in the form of line structures, in the form of a grid, in the form of a double point and the like.

Zwischen der äußeren und der inneren Schicht können gegebenenfalls Zwischenschichten situiert sein. Derartige Zwischenschichten können beispielsweise Barriereschichten, wie Aluminiumoxidschichten oder Siliciumoxidschichten, organische Barriereschichten, wie Polyamidschichten, Absorberschichten, beispielsweise Gasabsorberschichten wie O2-, CO2-Absorberschichten, Wasserdampfabsorberschichten, Ethylenabsorberschichten, bedruckte Schichten, Schichten, die erhöhte Flexibilität oder Festigkeit oder Steifigkeit verleihen und dergleichen sein. Der gesamte Schichtverbund der erfindungsgemäßen Verpackung kann gegebenenfalls mehrere Zwischenschichten und Kombinationen dieser Zwischenschichten umfassen, wobei die Schichten entweder jeweils gute Haftung zueinander aufweisen oder durch Hafthilfsmittel, wie Klebemittel untereinander verbunden sein können.Intermediate layers may optionally be located between the outer and inner layers. Such interlayers may include, for example, barrier layers such as alumina layers or silicon oxide layers, organic barrier layers such as polyamide layers, absorber layers, for example gas absorber layers such as O 2 , CO 2 absorber layers, water vapor absorber layers, ethylene absorber layers, printed layers, layers providing increased flexibility or strength or stiffness, and the like be. The entire layer composite of the packaging according to the invention may optionally comprise a plurality of intermediate layers and combinations of these intermediate layers, wherein the layers either each have good adhesion to each other or may be interconnected by adhesive aids such as adhesives.

Die im Bereich des Ventils gegebenenfalls vorhandene energieabsorbierende Beschichtung kann vollflächig oder partiell vorhanden sein. Sie kann beispielsweise auf die äußere Schicht aufgebracht sein. Sie kann aber auch in der Schutzsiegelung vorhanden sein, oder auf etwaige Vorsiegelungspunkte oder - bereiche aufgebracht sein.
Die energieabsorbierende Beschichtung kann beispielsweise eine metallische Beschichtung sein.
Als metallische Beschichtungen kommen beispielsweise Al, Cu, Fe, Ag, Au, Cr, Ni, Zn oder deren Verbindungen, beispielsweise deren Oxide oder Legierungen in Frage. Ferner kann beispielsweise Graphit als energieabsorbierende Beschichtung verwendet werden.The optionally present in the region of the valve energy-absorbing coating may be present over the entire surface or partially. It can for example be applied to the outer layer. However, it may also be present in the protective seal, or applied to any pre-seal points or areas.
The energy absorbing coating may be, for example, a metallic coating.
Examples of suitable metallic coatings are Al, Cu, Fe, Ag, Au, Cr, Ni, Zn or their compounds, for example their oxides or alloys. Further, graphite, for example, can be used as an energy absorbing coating.

Ferner kann die energieabsorbierende Beschichtung ein Aufdruck mit einer energieabsorbierende Pigmente oder Partikel enthaltenden Druckfarbe sein. Insbesondere kommen Partikel und Pigmente in Frage, die durch die einfallende Mikrowelleneinstrahlung in Resonanz kommen und in thermische Schwingung versetzt werden.
Darunter werden insbesondere Pigmente oder Partikel verstanden, die molekulares Wasser beinhalten, wie Wasserglas oder Zeolithe.Further, the energy absorbing coating may be a printing with an energy absorbing pigment or particle containing ink. In particular, particles and pigments come into question, which come into resonance by the incident microwave radiation and are put into thermal oscillation.
These are understood in particular to mean pigments or particles which contain molecular water, such as water glass or zeolites.

Die Beschichtung kann durch bekannte Druck- oder Lackierverfahren, durch Sputtern, Aufdampfen und dergleichen aufgebracht werden.The coating can be applied by known printing or painting methods, by sputtering, vapor deposition and the like.

Zum Nachweis der Öffnung des Ventils kann um den Bereich der Ausnehmung der inneren Schicht sowohl auf der inneren Schicht als auch auf der äußeren Schicht jeweils ein Merkmal aufgebracht sein, dass bei Öffnung des Ventils eine deutliche Änderung des Erscheinungsbildes zeigt.
Dabei können beispielsweise zwei unterschiedliche farbige Merkmale aufgebracht werden, die in geschlossenem Zustand des Ventils eine Mischfarbe bilden. Nach Öffnen des Ventils werden die beiden Schichten getrennt, es erscheinen die reinen Farben.
Ferner kann vorgesehen sein, zum Nachweis des Öffnens des Ventils auf den sich trennenden Schichten partielle Informationen aufzubringen, die sich dann nach dem Öffnen zu einer verständlichen Informationen, beispielsweise einem Schriftzug, beispielsweise "open" oder "offen" und dergleichen ergänzen. Dies kann unter Verwendung von Hilfsschichten mit unterschiedlicher Haftfestigkeit erfolgen.
In einer weiteren Ausführungsform kann über die Geometrie des Ventils ein akustischer Öffnungsnachweis, beispielsweise ein Pfeifton erzeugt werden. Dabei beginnt bei Öffnen des Ventils eine Tonlippe zu vibrieren, die dann den Pfeifton erzeugt.In order to detect the opening of the valve, a feature can be applied around the region of the recess of the inner layer, both on the inner layer and on the outer layer, that a distinct change in the appearance upon opening of the valve.
In this case, for example, two different colored features can be applied, which form a mixed color in the closed state of the valve. After opening the valve, the two layers are separated, the pure colors appear.
Furthermore, provision can be made to provide partial information for proving the opening of the valve on the separating layers, which information is then supplemented after opening to understandable information, for example lettering, for example "open" or "open" and the like. This can be done using auxiliary layers with different adhesive strength.
In a further embodiment, an acoustic opening detection, for example a whistling sound, can be generated via the geometry of the valve. When the valve is opened, a tone lip begins to vibrate, which then generates the whistling sound.

Ferner können auf der dem Innenraum der Verpackung zugewandten Seite der inneren Schicht eine oder mehrere Absorberschichten für den bei der Erwärmung entstehenden Wasserdampf vorgesehen sein. Als derartige Absorberschichten kommen beispielsweise hydrophile Polymere, wie EVA, mit Zeolithen hochgefüllte Polymere, Silicagel, Vliese, oder Gewebe die hydrophile Polymere eingelagert haben, mit Zeolith beschichtete Vliese oder Gewebe in Frage.Furthermore, on the interior of the packaging side facing the inner layer, one or more absorber layers for the in Heating water vapor generated be provided. As such absorber layers, for example, hydrophilic polymers, such as EVA, highly filled with zeolites polymers, silica gel, nonwovens, or tissue have embedded the hydrophilic polymers, zeolite-coated nonwovens or tissue in question.

In einer Ausführungsform kann die Absorberschicht durch Druckverfahren auf die innere Schicht aufgebracht sein.In one embodiment, the absorber layer may be applied to the inner layer by printing processes.

Die Absorberschicht kann aber auch mit einer dünnen Siegelschicht bzw. Membran an der inneren Schicht fixiert sein. Die Fixierungsschicht bzw. die Membran kann eine Sollbruchstelle aufweisen. Bei Überschreiten eines definierten Drucks in der Verpackung wird die Membran gedehnt und reißt an der Sollbruchstelle auf, wodurch die Absorberschicht freigelegt wird und der entstehende Wasserdampf absorbiert werden kann.However, the absorber layer can also be fixed to the inner layer with a thin sealing layer or membrane. The fixation layer or the membrane may have a predetermined breaking point. When a defined pressure in the package is exceeded, the membrane is stretched and ruptures at the predetermined breaking point, whereby the absorber layer is exposed and the resulting water vapor can be absorbed.

Anstelle der Absorberschicht können unter einer derartigen evt. zusätzlichen Membran auch Aromastoffe, beispielsweise Räucherstoffe, oder dergleichen vorhanden sein, die dann bei Überschreiten eines definierten Drucks durch Öffnen der Membran freigesetzt werden.
Zur Erzeugung eines charakteristischen Aromas können auch im Ventilbereich gekapselte Aromastoffe eingebracht sein, die bei Öffnen des Ventils freigesetzt werden.Instead of the absorber layer, such an additional membrane may also contain flavoring substances, for example smoking substances, or the like, which are then released when the defined pressure is exceeded by opening the membrane.
In order to produce a characteristic aroma, encapsulated aroma substances can also be introduced in the valve region, which are released when the valve is opened.

Ferner kann in der Verpackung eine Bräunungsschicht vorgesehen sein. Die Bräunungsschicht kann aus einem Papierverbund mit einer metallisierten Kunststofffolie, wie einer Polyesterfolie oder einer Polypropylenfolie bestehen.Furthermore, a browning layer may be provided in the package. The tanning layer may consist of a paper composite with a metallized plastic film, such as a polyester film or a polypropylene film.

In einer besonderen Ausführungsform kann die Verpackung in Form einer Zwei- oder Mehrkammernverpackung mit unterschiedlichem Inhalt ausgeführt sein, wobei gegebenenfalls auch zwischen den Kammern ein Ventil vorgesehen sein kann. Dabei kann beispielsweise in einer Kammer ein Fleischgericht verpackt sein, in der zweiten Kammer eine Beilage beispielsweise Reis oder Kartoffeln oder Kartoffelzubereitungen und dergleichen.In a particular embodiment, the packaging may be designed in the form of a two- or multi-chamber packaging with different contents, it also being possible for a valve to be provided between the chambers. In this case, for example, a meat dish packed in a chamber be in the second chamber a side dish, for example, rice or potatoes or potato preparations and the like.

Bei Überschreiten eines definierten Drucks in der Kammer des Fleischgerichts öffnet das zwischen den Kammern befindliche Ventil, der entstandene Wasserdampf kann in die Kammer, die die Beilage enthält, entweichen. Vorzugsweise weist die Kammer, die das Fleischgericht enthält eine Bräunungsfolie zum knusprigen Garen des Gerichts auf, wohingegen in der Kammer, die die Beilage enthält, eine Dampfgarung durch den aus der Nebenkammer entweichenden Wasserdampf erfolgt.
Gegebenenfalls kann auch ein weiteres Ventil zum Außenraum vorgesehen sein,When a defined pressure in the chamber of the meat dish is exceeded, the valve located between the chambers opens and the resulting water vapor can escape into the chamber containing the supplement. Preferably, the chamber containing the meat dish has a browning film for crunchy cooking of the dish, whereas in the chamber containing the side dish steaming is effected by the water vapor escaping from the secondary chamber.
Optionally, another valve may be provided to the exterior space,

Die Verbindung der einzelnen Schichten kann durch Heißsiegelkleber oder einen Kaschierkleber oder durch Extrusionskaschieren erfolgen.The connection of the individual layers can be effected by heat seal adhesive or a laminating adhesive or by extrusion laminating.

Ferner kann die Verpackung eine Öffnungshilfe, beispielsweise eine Perforation, einen Aufreißfaden oder Kerben aufweisen.Furthermore, the packaging may have an opening aid, for example a perforation, a tear thread or notches.

Die Verpackung kann in Form eines Beutels, einer Tasche, eines Standbeutels, eines Tablets, Sachet, Pouch oder in Form einer Siegelfolie für Behälter ausgebildet sein.The packaging may be in the form of a bag, a bag, a stand-up pouch, a tablet, sachet, pouch or in the form of a sealing foil for containers.

Claims (14)

Eine zur Erwärmung im Mikrowellenofen, im Ofen oder im Wasserbad geeignete Verpackung, bestehend aus einem mehrlagigen Folienmaterial, wobei die Folie eine äußere Schicht und eine innere Schicht aufweist, und die innere Schicht mit der äußeren Schicht mittels eines Klebemittels, wie Kaschierkleber mit einander verbunden ist, und die mindestens einen Bereich aufweist, der bei Überschreiten eines durch die Mikrowellenerhitzung erzeugten Innendrucks und/oder durch erhöhte Temperatur durchlässig wird, dadurch gekennzeichnet, dass die innere Schicht eine thermoplastische Beschichtung aufweist, die sich in Form von geometrischen Strukturen z.B. als Streifen von Kante zu Kante erstreckt.A packaging suitable for heating in a microwave oven, in an oven or in a water bath, consisting of a multilayer film material, wherein the film has an outer layer and an inner layer, and the inner layer is bonded to the outer layer by means of an adhesive such as laminating adhesive , and which has at least one region which becomes permeable when an internal pressure generated by the microwave heating is exceeded and / or at an elevated temperature, characterized in that the inner layer has a thermoplastic coating which is in the form of geometric structures, for example strips of edge extends to edge. Verpackung nach Anspruch 1, dadurch gekennzeichnet, dass die thermoplastische Beschichtung aus einem thermoplastischen Lack enthaltend PU, PMMA, PVA, PE, PP, Acrylate, Ethylenacrylaten, Ethylenacrylat deren Co- oder Ter-polymeren, Ionomeren, Polyesteracrylaten, Styrolacrylaten und dergleichen besteht.Packaging according to claim 1, characterized in that the thermoplastic coating consists of a thermoplastic lacquer comprising PU, PMMA, PVA, PE, PP, acrylates, ethylene acrylates, ethylene acrylate whose co- or ter-polymers, ionomers, polyester acrylates, styrene acrylates and the like. Verpackung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass um die Ausnehmungen eine Schutzsiegelung vorgesehen ist.Packaging according to claim 1 or 2, characterized in that a protective seal is provided around the recesses. Verpackung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass zwischen äußerer und innerer Schicht Zwischenschichten vorgesehen sind.Packaging according to one of claims 1 to 3, characterized in that intermediate layers are provided between the outer and inner layer. Verpackung nach Anspruch 4, dadurch gekennzeichnet, dass die Zwischenschichten, Barriereschichten, Absorberschichten, Bräunungsschichten, Flexibilität oder Festigkeit oder Steifigkeit und/oder bedruckte Schichten sind.Packaging according to claim 4, characterized in that the intermediate layers, barrier layers, absorber layers, browning layers, flexibility or strength or rigidity and / or printed layers. Verpackung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass auf der dem Innenraum der Verpackung zugewandten Seite der inneren Schicht eine Absorberschicht vorhanden ist, die durch eine Membran, die eine Sollbruchstelle aufweist, fixiert ist.Packaging according to one of claims 1 to 5, characterized in that on the interior of the packaging facing side of the inner layer, an absorber layer is present, which is fixed by a membrane having a predetermined breaking point. Verpackung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass durch eine Membran, die eine Sollbruchstelle aufweist, Aromastoffe fixiert sind.Packaging according to one of claims 1 to 6, characterized in that are fixed by a membrane having a predetermined breaking point, flavorings. Verpackung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass im Bereich des Ventils gekapselte Aromastoffe eingebracht sind, die bei Öffnen des Ventils freigesetzt werden.Packaging according to one of claims 1 to 7, characterized in that in the region of the valve encapsulated flavoring substances are introduced, which are released upon opening of the valve. Verpackung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass im Bereich der Ausnehmung der inneren Schicht auf der inneren Schicht und der äußeren Schicht unterschiedliche Merkmale aufgebracht sind, die nach Öffnen des Ventils eine deutliche Änderung des optischen Erscheinungsbildes zeigen.Packaging according to one of claims 1 to 8, characterized in that in the region of the recess of the inner layer on the inner layer and the outer layer different features are applied, which show a significant change in the visual appearance after opening the valve. Verpackung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass beim Öffnen des Ventils ein akustisches Signal erzeugt wird.Packaging according to one of claims 1 to 9, characterized in that when opening the valve, an acoustic signal is generated. Verpackung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass die energieabsorbierende Beschichtung eine metallische Beschichtung oder eine Beschichtung mit einer Druckfarbe, die energieabsorbierende Pigmente oder Partikel ist.Packaging according to one of claims 1 to 10, characterized in that the energy absorbing coating is a metallic coating or a coating with a printing ink, the energy absorbing pigments or particles. Verpackung nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass die Verpackung als Mehrkammemverpackung ausgeführt ist.Packaging according to one of claims 1 to 11, characterized in that the packaging is designed as Mehrkammemverpackung. Verpackung nach Anspruch 12, dadurch gekennzeichnet, dass zwischen den Kammern ein Ventil vorgesehen ist.Packaging according to claim 12, characterized in that a valve is provided between the chambers. Folienmaterial zur Herstellung von Verpackungen nach einem der Ansprüche 1 bis 13.Film material for the production of packaging according to one of claims 1 to 13.
EP06007293A 2006-04-06 2006-04-06 Packaging having a thermoplastic coating for microwave ovens Withdrawn EP1842796A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06007293A EP1842796A1 (en) 2006-04-06 2006-04-06 Packaging having a thermoplastic coating for microwave ovens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06007293A EP1842796A1 (en) 2006-04-06 2006-04-06 Packaging having a thermoplastic coating for microwave ovens

Publications (1)

Publication Number Publication Date
EP1842796A1 true EP1842796A1 (en) 2007-10-10

Family

ID=36871761

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06007293A Withdrawn EP1842796A1 (en) 2006-04-06 2006-04-06 Packaging having a thermoplastic coating for microwave ovens

Country Status (1)

Country Link
EP (1) EP1842796A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1179260A (en) * 1997-07-17 1999-03-23 Toyo Alum Kk Packaging material which can release internal pressure
EP1277672A1 (en) * 2000-04-26 2003-01-22 Plast Corporation Packaging material and packaging product
US20040103989A1 (en) * 2000-06-01 2004-06-03 Irene Lin Method for manufacturing an air permeable composite film

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1179260A (en) * 1997-07-17 1999-03-23 Toyo Alum Kk Packaging material which can release internal pressure
EP1277672A1 (en) * 2000-04-26 2003-01-22 Plast Corporation Packaging material and packaging product
US20040103989A1 (en) * 2000-06-01 2004-06-03 Irene Lin Method for manufacturing an air permeable composite film

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 08 30 June 1999 (1999-06-30) *

Similar Documents

Publication Publication Date Title
US5132151A (en) Multi-layer cover
EP1961670B1 (en) Two layer lid
EP0967160B1 (en) Sealing membrane with a pressure relief valve
AT500343B1 (en) LID WITH REMOVAL OPENING FOR CLOSING CONTAINERS
EP0891861B1 (en) Material for packaging and for lids
DE60210286T2 (en) PACKAGING FILM
WO1999043570A1 (en) Packaging material
EP0571328A1 (en) Polymer resin film laminates and packagings
DE102007059189A1 (en) Resealable packaging
DE102014010016A1 (en) Sheet-like composite, in particular for containers, having a bonding agent layer characterized by various C = O group absorption maxima
DE102014009466A1 (en) Sheet-like composite with a mPolyolefinschicht with reduced antioxidant content, especially for food packaging
DE102012102410A1 (en) Tray packaging for food
JP2013023283A (en) Container for microwave oven heating
EP1714908B1 (en) Package suitable for microwave
EP1912865B1 (en) Reclosable microwave-suitable packaging
EP1842796A1 (en) Packaging having a thermoplastic coating for microwave ovens
DE102011050815A1 (en) Packaging material for food
EP0013745B1 (en) Laminated sheet, method of producing same and its application
DE102009034210A1 (en) Transparent lace bag, preferably with PLA
AT502632B1 (en) Packaging bags, in particular for chocolate goods
DE102016216241A1 (en) SURFACE COMPOSITE FOR MANUFACTURING STAINLESS FOOD CONTAINERS WITH A BARRIER LAYER THAT HAS A BRILLIANT SURFACE INSIDE
DE2531860B2 (en) Composite shell
CH701563A2 (en) Packaging.
EP2907766A1 (en) Packaging
TH41840B (en)

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): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

17P Request for examination filed

Effective date: 20080326

17Q First examination report despatched

Effective date: 20080509

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: MONDI AG

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: 20090810