EP2484601A1 - Multiple layer film for gas-tight microwave packaging - Google Patents
Multiple layer film for gas-tight microwave packaging Download PDFInfo
- Publication number
- EP2484601A1 EP2484601A1 EP11153239A EP11153239A EP2484601A1 EP 2484601 A1 EP2484601 A1 EP 2484601A1 EP 11153239 A EP11153239 A EP 11153239A EP 11153239 A EP11153239 A EP 11153239A EP 2484601 A1 EP2484601 A1 EP 2484601A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- multilayer film
- layer
- packaging
- film according
- susceptor surface
- 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.)
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Classifications
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- 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
- B65D51/00—Closures not otherwise provided for
- B65D51/16—Closures not otherwise provided for with means for venting air or gas
- B65D51/1633—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element
- B65D51/1638—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element by means of an element bursting upon a predetermined pressure in the container being exceeded
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
- B65D81/3446—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
- B65D81/3461—Flexible containers, e.g. bags, pouches, envelopes
Definitions
- the invention relates to a multilayer film for gas-tight sealed microwave packaging with a sealable layer on the inside of the packaging and at least one further layer which forms a cover layer on the outside of the package.
- a sealable layer on the inside of the packaging and at least one further layer which forms a cover layer on the outside of the package.
- microwave packaging is meant the packaging of a food which is heated in a microwave oven. When heated, the food remains inside the closed package.
- the multilayer film described above can form a closed pouch packaging or used as a cover, the z. B. is applied gas-tight on a shell.
- the microwave packaging may be an inert gas, e.g. As nitrogen, CO 2 or the like for preserving the food.
- microwave packaging When heating a gas-tight microwave packaging pressure builds up in the interior of the package by expanding the inert gas and / or by releasing water vapor.
- the microwave packaging must therefore have a device for venting, so that the overpressure can escape during heating.
- labels or other valve elements are used. Such additional elements to be applied are expensive to apply, hinder the winding of the multilayer film on a roll and cause additional costs.
- WO 2007/127519 A1 is a multilayer film for gastight microwave packaging sealed with the features described above.
- the film contains openings which do not completely penetrate the multilayer film.
- the openings form predetermined breaking points, which should open when pressure builds up within the packaging by heating the packaged food.
- the production of such a film is expensive. If the covering layer is perforated before it is glued to the sealing layer, the openings provided as predetermined breaking points set and are no longer functional. If the openings z. B. by punching or by means of a laser technology subsequently introduced into the multilayer film, it is difficult to set the penetration depth reliable and reproducible so that the microwave packaging opens at a defined pressure. If z. B.
- the openings are not deep enough and it can not be vented. In this case, uncontrolled bursting of the packaging occurs when the food is heated in the microwave oven. If the laser power is too high, holes are created which completely penetrate the film, so that the packaging is not gastight and spoils the packaged food quickly.
- WO 2009/120739 A2 is a microwave packaging known, which consists of a multilayer film and is closed by a peelable seal.
- the peelable sealing seam connects two overlapping film sections, wherein a film surface is designed as a susceptor surface and has a microwave-absorbing material which heats up upon microwave irradiation and reduces the adhesive force of the peel seam by heating. If pressure builds up in the microwave oven due to heating of packaged food, the peelable sealing seam opens locally so that the overpressure can escape. However, the opening behavior of the peel seam is dependent on a multiplicity of factors z. B. the dimensions and adhesive properties of the peel seam and is difficult to regulate and poorly reproducible.
- the invention has for its object to provide a universally usable multi-layer film for microwave packaging, which allows a gas-tight closure of the package until heating and ensures reliable ventilation of the packaging when the packaging is heated with a food packaged therein in a microwave oven.
- the object is achieved in that in the region of the predetermined breaking points at least one susceptor surface is arranged, which heats up in a microwave irradiation and heats the film at the predetermined breaking points.
- the predetermined breaking points preferably consist of holes which form a perforation and do not completely penetrate the multilayer film.
- the openings may be introduced into the cover layer, wherein the openings do not extend into the sealing layer or at least do not completely penetrate the sealing layer.
- the holes can be made by means of a stamping technique.
- the holes are introduced by laser beams in the multilayer film.
- the susceptor surface causes the film is heated in a heating of the packaged food in a microwave oven in the region of the predetermined breaking points and decreases the strength of the film in the region of the perforation.
- the force for piercing the predetermined breaking points for releasing the vents is reduced. Due to the local weakening of the film, the predetermined breaking points open even if the perforations are not as deep as desired. Larger deviations in the depth of the perforation holes are tolerable without adversely affecting venting upon microwave heating of the microwave package.
- the openings for the predetermined breaking points may have a depth which is between 30% and 90% of the film thickness. In this area, changes in the depth of the perforations are allowed without any detrimental effect on the venting properties.
- the predetermined breaking points are provided as a tear-open or part of a tear-open the package.
- the susceptor surface may be arranged on the outside of the film.
- the cover layer on the outside of the package is chosen so that the susceptor surface does not come into contact with the packaged food.
- the susceptor surface can be arranged in the interior of the film and is in particular laminated between the cover layer and the sealable layer. It is further within the scope of the invention that the susceptor surface is disposed within the sealable layer between two layers of sealable material.
- the susceptor surface and the sealable layers can also form a laminate on which the cover layer is laminated. In the context of the invention, however, coextruded films can also be used, in which case the susceptor surface is usually provided on an outer side of the film.
- the susceptor surface may be a metallized film or may be carbon black, ferrites, conductive polymers or a mixture thereof. Preferably, inexpensive carbon black is used. Electrically conductive polymers are known for other applications and are used in known measures, z. B. in RFID technology, used as materials for batteries, sensors and the like. Polyaniline, polypyrrole or poly-3-alkylthiopene are particularly suitable here.
- the sheet resistance of the susceptor layer is preferably less than 20 kOhms (20 kOhms / square), especially less than 10 kOhms (10kOhms / square). For better identification and differentiation from the usual electrical resistance, the unit resistance Ohm / square, which is considered in parentheses, is often used for the sheet resistance.
- multilayer film is intended to form gas-tight sealed microwave packaging. These are used to package food that is heated in a microwave oven when the packaging is closed.
- the multilayer film can be used as a film covering a shell. It is also possible to produce a tubular bag which is closed on all sides and encloses the packaged goods in a gastight manner.
- multilayer film has a sealable layer 1 on the inside of the packaging and at least one further layer forming a cover layer 2 on the outside of the package, on.
- openings 3 are introduced, which do not fully enforce the sealable layer and form predetermined breaking points 3 '.
- the predetermined breaking points 3 ' open under a pressure that builds up within the microwave packaging by heating the food by means of microwaves.
- the predetermined breaking points 3 ' open when the microwave packaging is heated in a microwave oven, so that the overpressure arising when the food is heated can escape within the packaging.
- the diagram illustrates this.
- the diagram refers to a multilayer film which has a 75 ⁇ m thick sealable layer of a polyolefin, in particular a polyethylene, and a 12 ⁇ m thick cover layer of a polyester.
- the perforation holes have been introduced by a laser technology, which does not fully enforce the sealable layer 1 and form predetermined breaking points 3 '. If the film has no susceptor surfaces, the perforation holes must be as shown in Fig. 4 have a depth of at least 70% based on the film thickness, so that the predetermined breaking points 3 'rupture when the microwave packaging is heated in a microwave oven.
- the work area A relative to the original working area A' increases such that holes with a penetration depth of 30% based on the film thickness already form predetermined breaking points 3 ', which rupture when heated packaged food in the microwave oven.
- the usable working area and the reliability of a vent become larger.
- multilayer film has susceptor surfaces 4, which are arranged on the outside of the film. They are applied to the outer layer 2 on the outside of the packaging and thus do not come into contact with packaged food.
- multilayer film has susceptor surfaces 4 ', which are arranged in the interior of the film and between the cover layer 2 and the sealable layer 1 are laminated.
- a susceptor surface 4 " is disposed between sealable material layers 5, 6 within the sealable layer 1.
- the susceptor surface 4" and the sealable layers 5, 6 may form a laminate onto which the cover layer 2 is laminated.
- the susceptor surfaces 4, 4 ', 4 " may consist of a metallized film or a carbon black / ferritic coating
- the susceptor surfaces 4, 4', 4" consist of an electrically conductive polymer.
- polyanilines, polypyrroles and poly (3-alkylthiophenes) are suitable.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Food Science & Technology (AREA)
- Package Specialized In Special Use (AREA)
Abstract
Description
Die Erfindung betrifft eine Mehrschichtfolie für gasdicht verschlossene Mikrowellenverpackungen mit einer siegelfähigen Schicht an der Verpackungsinnenseite und zumindest einer weiteren Schicht, die eine Deckschicht an der Verpackungsaußenseite bildet. In einer der Schichten an der Verpackungsinnenseite oder der Verpackungsaußenseite sind Öffnungen eingebracht, welche die Mehrschichtfolie nicht vollständig durchsetzen und Sollbruchstellen bilden.The invention relates to a multilayer film for gas-tight sealed microwave packaging with a sealable layer on the inside of the packaging and at least one further layer which forms a cover layer on the outside of the package. In one of the layers on the inside of the packaging or the outside of the packaging openings are introduced, which do not fully enforce the multi-layer film and form predetermined breaking points.
Unter Mikrowellenverpackung wird die Verpackung eines Lebensmittels verstanden, welches in einem Mikrowellenofen erwärmt wird. Bei der Erwärmung verbleibt das Lebensmittel innerhalb der geschlossenen Verpackung. Die eingangs beschriebene Mehrschichtfolie kann eine geschlossene Beutelverpackung bilden oder als Abdeckfolie verwendet werden, die z. B. auf eine Schale gasdicht aufgebracht ist. Die Mikrowellenverpackung kann ein Inertgas, z. B. Stickstoff, CO2 oder dergleichen zur Konservierung des Lebensmittels enthalten.By microwave packaging is meant the packaging of a food which is heated in a microwave oven. When heated, the food remains inside the closed package. The multilayer film described above can form a closed pouch packaging or used as a cover, the z. B. is applied gas-tight on a shell. The microwave packaging may be an inert gas, e.g. As nitrogen, CO 2 or the like for preserving the food.
Bei der Erhitzung einer gasdichten Mikrowellenverpackung baut sich im Innern der Verpackung durch Ausdehnen des Inertgases und/oder durch Freisetzen von Wasserdampf ein Druck auf. Die Mikrowellenverpackung muss daher eine Einrichtung zur Entlüftung aufweisen, damit der Überdruck beim Erhitzen entweichen kann. Zu diesem Zweck werden häufig aufklebbare Etiketten oder sonstige Ventilelemente eingesetzt. Solche zusätzlich aufzubringenden Elemente sind aufwendig zu applizieren, behindern das Aufwickeln der Mehrschichtfolie auf eine Rolle und verursachen zusätzliche Kosten.When heating a gas-tight microwave packaging pressure builds up in the interior of the package by expanding the inert gas and / or by releasing water vapor. The microwave packaging must therefore have a device for venting, so that the overpressure can escape during heating. For this purpose, often labels or other valve elements are used. Such additional elements to be applied are expensive to apply, hinder the winding of the multilayer film on a roll and cause additional costs.
Aus
Aus
Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, eine universell verwendbare Mehrschichtfolie für Mikrowellenverpackungen anzugeben, die einen gasdichten Verschluss der Verpackung bis zur Erwärmung ermöglicht und eine zuverlässige Entlüftung der Verpackung sicherstellt, wenn die Verpackung mit einem darin abgepackten Lebensmittel im Mikrowellenofen erwärmt wird.Against this background, the invention has for its object to provide a universally usable multi-layer film for microwave packaging, which allows a gas-tight closure of the package until heating and ensures reliable ventilation of the packaging when the packaging is heated with a food packaged therein in a microwave oven.
Ausgehend von einer Mehrschichtfolie mit den eingangs beschriebenen Merkmalen wird die Aufgabe erfindungsgemäß dadurch gelöst, dass im Bereich der Sollbruchstellen mindestens eine Suszeptorfläche angeordnet ist, die sich bei einer Mikrowellenbestrahlung aufheizt und die Folie an den Sollbruchstellen erhitzt. Die Sollbruchstellen bestehen vorzugsweise aus Löchern, die eine Perforation bilden und die Mehrschichtfolie nicht vollständig durchdringen. Insbesondere können die Öffnungen in die Deckschicht eingebracht sein, wobei die Öffnungen sich nicht in die Siegelschicht erstrecken oder zumindest die Siegelschicht nicht vollständig durchsetzen.Based on a multilayer film with the features described above, the object is achieved in that in the region of the predetermined breaking points at least one susceptor surface is arranged, which heats up in a microwave irradiation and heats the film at the predetermined breaking points. The predetermined breaking points preferably consist of holes which form a perforation and do not completely penetrate the multilayer film. In particular, the openings may be introduced into the cover layer, wherein the openings do not extend into the sealing layer or at least do not completely penetrate the sealing layer.
Die Löcher können mittels einer Stanztechnik hergestellt werden. Vorzugsweise werden die Löcher durch Laserstrahlen in die Mehrschichtfolie eingebracht. Die Suszeptorfläche bewirkt, dass die Folie bei einer Erwärmung des abgepackten Lebensmittel in einem Mikrowellenofen im Bereich der Sollbruchstellen aufgeheizt wird und die Festigkeit der Folie im Bereich der Perforation abnimmt. Die Kraft zum Durchstoßen der Sollbruchstellen zum Freisetzen der Entlüftungsöffnungen verringert sich. Aufgrund der lokalen Schwächung der Folie öffnen sich die Sollbruchstellen auch dann, wenn die Perforationen nicht so tief wie gewünscht sind. Größere Abweichungen bezüglich der Tiefe der Perforationslöcher sind tolerierbar, ohne dass sich dies negativ auf die Entlüftung beim Mikrowellenaufheizen der Mikrowellenverpackung auswirkt. Die Öffnungen für die Sollbruchstellen können eine Tiefe aufweisen, die zwischen 30 % und 90 % der Foliendicke beträgt. In diesem Bereich sind Änderungen der Tiefe der Perforationen zulässig, ohne dass nachteilige Auswirkungen auf die Entlüftungseigenschaften zu befürchten sind. Im Rahmen der Erfindung sind auch Ausgestaltungen möglich, bei denen die Sollbruchstellen als Aufreißhilfe oder Teil einer Aufreißhilfe der Verpackung vorgesehen sind.The holes can be made by means of a stamping technique. Preferably, the holes are introduced by laser beams in the multilayer film. The susceptor surface causes the film is heated in a heating of the packaged food in a microwave oven in the region of the predetermined breaking points and decreases the strength of the film in the region of the perforation. The force for piercing the predetermined breaking points for releasing the vents is reduced. Due to the local weakening of the film, the predetermined breaking points open even if the perforations are not as deep as desired. Larger deviations in the depth of the perforation holes are tolerable without adversely affecting venting upon microwave heating of the microwave package. The openings for the predetermined breaking points may have a depth which is between 30% and 90% of the film thickness. In this area, changes in the depth of the perforations are allowed without any detrimental effect on the venting properties. In the context of the invention, embodiments are possible in which the predetermined breaking points are provided as a tear-open or part of a tear-open the package.
Die Suszeptorfläche kann an der Folienaußenseite angeordnet sein. Vorzugsweise wird die Deckschicht an der Verpackungsaußenseite gewählt, so dass die Suszeptorfläche nicht mit dem abgepackten Lebensmittel in Berührung kommt.The susceptor surface may be arranged on the outside of the film. Preferably, the cover layer on the outside of the package is chosen so that the susceptor surface does not come into contact with the packaged food.
Bevorzugt ist eine Anordnung der Suszeptorfläche an oder in der Nähe der Siegelschicht. Die Suszeptorfläche kann im Innern der Folie angeordnet werden und ist insbesondere zwischen der Deckschicht und der siegelfähigen Schicht einkaschiert. Im Rahmen der Erfindung liegt es ferner, dass die Suszeptorfläche innerhalb der siegelfähigen Schicht zwischen zwei Schichten aus siegelfähigem Material angeordnet ist. Die Suszeptorfläche und die siegelfähigen Schichten können auch ein Laminat bilden, auf das die Deckschicht aufkaschiert ist. Im Rahmen der Erfindung können aber auch coextrudierte Folien eingesetzt werden, wobei dann die Suszeptorfläche üblicherweise an einer Außenseite der Folie vorgesehen ist.An arrangement of the susceptor surface at or in the vicinity of the sealing layer is preferred. The susceptor surface can be arranged in the interior of the film and is in particular laminated between the cover layer and the sealable layer. It is further within the scope of the invention that the susceptor surface is disposed within the sealable layer between two layers of sealable material. The susceptor surface and the sealable layers can also form a laminate on which the cover layer is laminated. In the context of the invention, however, coextruded films can also be used, in which case the susceptor surface is usually provided on an outer side of the film.
Die Suszeptorfläche kann eine metallisierten Folie sein oder aus Ruß, Ferriten, leitfähigen Polymeren oder einer Mischung daraus bestehen. Vorzugsweise wird kostengünstiges Ruß eingesetzt. Elektrisch leitfähige Polymere sind für andere Anwendungen bekannt und werden im Rahmen bekannter Maßnahmen, z. B. in der RFID-Technologie, als Materialien für Batterien, Sensoren und dergleichen eingesetzt. Geeignet sind hier insbesondere Polyanilin, Polypyrrol oder Poly-3-Alkylthiopen. Der Flächenwiderstand der Suszeptorschicht beträgt vorzugsweise weniger als 20 kOhm (20 kOhm/square), insbesondere weniger als 10 kOhm (10kOhm/square). Zur besseren Kennzeichnung und Abgrenzung gegenüber dem üblichen elektrischen Widerstand wird für den Flächenwiderstand häufig auch die in Klammern berücksichtigte Einheit Ohm/square verwendet.The susceptor surface may be a metallized film or may be carbon black, ferrites, conductive polymers or a mixture thereof. Preferably, inexpensive carbon black is used. Electrically conductive polymers are known for other applications and are used in known measures, z. B. in RFID technology, used as materials for batteries, sensors and the like. Polyaniline, polypyrrole or poly-3-alkylthiopene are particularly suitable here. The sheet resistance of the susceptor layer is preferably less than 20 kOhms (20 kOhms / square), especially less than 10 kOhms (10kOhms / square). For better identification and differentiation from the usual electrical resistance, the unit resistance Ohm / square, which is considered in parentheses, is often used for the sheet resistance.
Im Folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung erläutert. Es zeigen schematisch
- Fig. 1
- ausschnittsweise einen Schnitt durch eine Mehrschichtfolie für gasdicht verschlossene Mikrowellenverpackungen,
- Fig. 2 und 3
- weitere Ausgestaltungen dieser Folie, ebenfalls im Schnitt,
- Fig. 4
- ein Arbeitsdiagramm zur Erläuterung der erfindungsgemäßen Lehre.
- Fig. 1
- a section through a multilayer film for gas-tight sealed microwave packaging,
- FIGS. 2 and 3
- further embodiments of this film, also in section,
- Fig. 4
- a working diagram for explaining the teaching of the invention.
Die in
Die in
Im Bereich der Sollbruchstellen 3' sind Suszeptorflächen 4 angeordnet, die sich bei einer Mikrowellenbestrahlung aufheizen und die Folie an den Sollbruchstellen 3' erhitzen. Durch eine lokale Erhitzung der Folie nimmt die Festigkeit der Folie im Bereich der Sollbruchstellen 3' deutlich ab. Die Öffnungskraft wird geringer, so dass eine geringere Eindringtiefe der Öffnungen 3 ausreichend ist, um eine aus der Mehrschichtfolie bzw. unter Verwendung der Mehrschichtfolie gebildete Mikrowellenverpackung während der Erwärmung verpackter Speisen im Mikrowellenofen zu entlüften. Das in
Die in
Die in
Im Ausführungsbeispiel der
Die Suszeptorflächen 4, 4', 4" können aus einer metallisierten Folie oder einer Ruß/Ferrite-Beschichtung bestehen. Vorzugsweise bestehen die Suszeptorflächen 4, 4', 4" aus einem elektrisch leitfähigen Polymer. In Betracht kommen insbesondere Polyaniline, Polypyrrole und Poly(3-Alkylthiophene).The susceptor surfaces 4, 4 ', 4 "may consist of a metallized film or a carbon black / ferritic coating Preferably, the susceptor surfaces 4, 4', 4" consist of an electrically conductive polymer. In particular, polyanilines, polypyrroles and poly (3-alkylthiophenes) are suitable.
Claims (12)
einer siegelfähigen Schicht (1) an der Verpackungsinnenseite und
zumindest einer weiteren Schicht, die eine Deckschicht (2) an der Verpackungsaußenseite bildet,
wobei in einer der Schichten an der Verpackungsinnenseite oder der Verpackungsaußenseite Öffnungen (3) eingebracht sind, welche die Mehrschichtfolie nicht vollständig durchsetzen und Sollbruchstellen (3') bilden, dadurch gekennzeichnet, dass im Bereich der Sollbruchstellen (3') mindestens eine Suszeptorfläche (4, 4', 4") angeordnet ist, die sich bei einer Mikrowellenbestrahlung aufheizt und die Folie an den Sollbruchstellen (3') erhitzt.Multi-layer film for gas-tight sealed microwave packaging with
a sealable layer (1) on the inside of the packaging and
at least one further layer which forms a cover layer (2) on the outside of the packaging,
wherein openings (3) are introduced in one of the layers on the inside of the packaging or on the outside of the packaging, which do not completely penetrate the multilayer film and form predetermined breaking points (3 '), characterized in that at least one susceptor surface (4, 4') in the region of the predetermined breaking points (3 '). 4 ', 4 ") is arranged, which heats up in a microwave irradiation and the film at the predetermined breaking points (3') heated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11153239A EP2484601A1 (en) | 2011-02-03 | 2011-02-03 | Multiple layer film for gas-tight microwave packaging |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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EP11153239A EP2484601A1 (en) | 2011-02-03 | 2011-02-03 | Multiple layer film for gas-tight microwave packaging |
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Publication Number | Publication Date |
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EP2484601A1 true EP2484601A1 (en) | 2012-08-08 |
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EP11153239A Withdrawn EP2484601A1 (en) | 2011-02-03 | 2011-02-03 | Multiple layer film for gas-tight microwave packaging |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2714540B1 (en) * | 2011-05-26 | 2018-01-24 | Amcor Flexibles Transpac B.V.B.A. | A hermetically closed package to be heated in a microwave oven |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007127519A2 (en) | 2006-02-08 | 2007-11-08 | General Mills Marketing, Inc. | Pouch for steaming vegetables |
WO2009120739A2 (en) | 2008-03-27 | 2009-10-01 | Graphic Packaging International, Inc. | Self-venting microwave heating package |
-
2011
- 2011-02-03 EP EP11153239A patent/EP2484601A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007127519A2 (en) | 2006-02-08 | 2007-11-08 | General Mills Marketing, Inc. | Pouch for steaming vegetables |
WO2009120739A2 (en) | 2008-03-27 | 2009-10-01 | Graphic Packaging International, Inc. | Self-venting microwave heating package |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2714540B1 (en) * | 2011-05-26 | 2018-01-24 | Amcor Flexibles Transpac B.V.B.A. | A hermetically closed package to be heated in a microwave oven |
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