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)
• Wrappers (AREA)
• Packages (AREA)

Priority Applications (1)

Applications Claiming Priority (1)

Publications (1)

Family

ID=36871761

Family Applications (1)

Country Status (1)

Citations (3)

• 2006
  • 2006-04-06 EP EP06007293A patent/EP1842796A1/fr not_active Withdrawn

Patent Citations (3)

Non-Patent Citations (1)

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