EP1577226B1 - Two layer lid - Google Patents

Two layer lid Download PDF

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Publication number
EP1577226B1
EP1577226B1 EP05450022A EP05450022A EP1577226B1 EP 1577226 B1 EP1577226 B1 EP 1577226B1 EP 05450022 A EP05450022 A EP 05450022A EP 05450022 A EP05450022 A EP 05450022A EP 1577226 B1 EP1577226 B1 EP 1577226B1
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EP
European Patent Office
Prior art keywords
layer
stamped out
form according
lid form
inner layer
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EP05450022A
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German (de)
French (fr)
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EP1577226A1 (en
Inventor
Andreas Niederer
Lambert Nekula
Franz Reiterer
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Teich AG
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Teich AG
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Publication date
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Priority to EP08011221A priority Critical patent/EP1961670B1/en
Priority to SI200530856T priority patent/SI1577226T1/en
Priority to PL05450022T priority patent/PL1577226T3/en
Publication of EP1577226A1 publication Critical patent/EP1577226A1/en
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Publication of EP1577226B1 publication Critical patent/EP1577226B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B65D77/2028—Means for opening the cover other than, or in addition to, a pull tab
    • B65D77/2032—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
    • B65D77/2044—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure
    • B65D77/2048—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut
    • B65D77/2056—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut the cover being weakened
    • B65D77/206—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut the cover being weakened so as to uncover one or more preformed openings made through some layers of the cover
    • 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
    • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10—Container closures formed after filling
    • B65D2577/20—Container closures formed after filling by applying separate lids or covers
    • B65D2577/2075—Lines of weakness or apertures
    • B65D2577/2091—Lines of weakness or apertures in cover

Definitions

  • the invention relates to a lid-shaped punched-out element for closing containers for microwave dishes according to the preamble of claim 1.
  • two-layer lid for closing containers, for example, to allow the required food for flavor protection.
  • the two layers are connected to each other via a pressure-sensitive adhesive.
  • the two layers are connected together by a layer of a non-reactive heat adhesive.
  • the upper layer of the lid is removed and only after the separation of the inner, second layer, the access to the packaged goods is possible.
  • the access to the packaged goods can also be achieved by integrated grip bottles, as in the US 2004/0013827 A1 and the US-A-5,709,310 be facilitated.
  • a pouring opening is described, which is formed by material cuts or indentations in the packaged goods facing position during peeling of the layers.
  • This pouring opening can also be resealed.
  • the reclosability of this package is effected by a self-adhesive layer applied between the layers.
  • the packaged goods are in the "resealed" state against the ingress of contaminants protected;
  • an aroma protection or even a possible heating of the packaged goods is only possible to a limited extent, since aroma and pack contents can escape during heating due to the material-like separations in the form of incisions.
  • the invention aims to remedy this situation.
  • the present invention is therefore based on the object to provide a cover-shaped punched-out element of the type mentioned above, which satisfactorily preserves the contents of the package, in particular as regards the aroma protection, and which is easy to handle for the consumer when opening.
  • this object is achieved with a lid-shaped punched-out element of the type mentioned above, which is characterized in that the predetermined breaking points are realized in the form of stampings, which may differ due to the heating of microwave dishes, possibly resulting vapors.
  • cover-shaped punched element are disclosed according to the subclaims.
  • the outer layer 2 or the inner layer 3 is produced for the time being.
  • the outer layer 2 for example, an aluminum foil whose thickness is in a range of 10 to 100 microns is used.
  • plastic films in a thickness range of 10 to 100 microns.
  • the plastics can be selected from the group consisting of polypropylene, polyethylene, polyester, polyacrylate, polyamide or polystyrene.
  • the outer layer 2 can further be equipped with a printed image on its surface side facing the observer. This may be both smooth and rough in its surface finish. The surface roughness results from irregular, but also regular arrangement of the print motifs the desired print image. Furthermore, the surface roughness of the printed image facilitates the unstacking of the usually stored in magazines stacked punched-out elements.
  • the aforementioned printed image can also reproduce the information from which the consumer takes the origin, composition and duration of the durability of the packaged goods.
  • Cold-sealing substances are characterized by the fact that a bond between two layers can be produced by applying pressure, but without additional temperature application.
  • the cold-sealing layer may be provided, for example, by applying a polymer-containing emulsion or dispersion.
  • polymer-containing emulsions in aqueous form for example, those with the trade name "Crodaseal 22-055" can be used, since they comply with food law regulations.
  • the layer 3 facing the container is produced or prepared in a further method step.
  • This consists for example of plastics in mono- or composite structure, wherein a thickness range of 10 to 100 microns is selected.
  • the plastics can be selected from the group consisting of polypropylene, polyethylene, polyester, polyacrylate, polyamide or polystyrene.
  • the inner layer 3 facing the container is provided with a heat-sealable layer 5 on its surface side 3 'facing the container.
  • a heat-sealable layer 5 on its surface side 3 'facing the container.
  • This can be formed for example from a heat sealing lacquer or a peelable plastic film.
  • the heat-sealable layer 5 is designed to be surface-rough, since this substantially facilitates the destacking of the cover elements which are usually mounted one above the other in magazines.
  • the rapid destacking process is particularly advantageous if, as in the case of perishable food, they must be particularly carefully and hermetically sealed during packaging.
  • predetermined breaking points 10 are generated by punching and serve that, for example, when heating microwave dishes possibly resulting vapors may differ without causing contamination of the microwave oven.
  • the cold-sealing layer 4 After preparing or preparing the outer layer 2 or the inner layer 3, these are connected to one another via their mutually facing surface sides 2 'and 3' by the cold-sealing layer 4 in a cold lamination process.
  • Due to the pressure formed in the nip pressure occurs at room temperature on the cold-sealing layer 4 is an adhesive bond on the surface sides 2 'and 3' of the layers 2 and 3. Since the laminating at room temperature, the heat-sealable layer 5 remains in the deactivated state, ie no crosslinking reactions of any kind whatsoever take place which cause an undesired adhesion at this
  • the layers 2 and 3 are now connected via their surfaces 2 'and 3' by the cold-sealing layer 4.
  • This composite is stored as a roll from which the elements can be punched out for closing in the appropriate lid shape.
  • the formation of an opening aid, for example a gripping tab 9, 9 ', can also be provided at the glue-free areas.
  • cover elements 1, which are usually stored in magazines, can now be used for further use, i. for closing containers 7, are used. After filling, the containers 7 are closed continuously with the lid-shaped punched-out elements 1 according to the invention in a heat-sealing process.
  • the lid member 1 actually partially peeled off i. can be peeled, is the bond between the outer layer 2 and the inner layer 3 in a range of 0.2 to 4.5 N / 15 mm (measured according to DIN EN 28510-1 "peel test for flexible / rigidly bonded samples") ,
  • the composite partners are separated from each other at the ends of the samples by hand, so that the free ends can be clamped in the clamping device of the Buchprüfauss, for example one of the company. Zwick.
  • the clamping device of the Switzerlandprüfauss, for example one of the company. Zwick.
  • a clamping length of max. 50 mm and a take-off angle of 90 ° the further examination.
  • the measurement result or the course of the peel strength (composite adhesion) is either read on the tensile tester or recorded with the chart recorder. From the results of each series of experiments the mean values are calculated in N / 15mm.

Description

Die Erfindung betrifft ein deckelförmig ausgestanztes Element zum Verschließen von Behältern für Mikrowellengerichte gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a lid-shaped punched-out element for closing containers for microwave dishes according to the preamble of claim 1.

Es ist bekannt, zweilagige Deckel zum Verschließen von Behältern einzusetzen, um beispielsweise den für Lebensmittel geforderten Aromaschutz zu ermöglichen. Gemäß der US 2004/0013827 A1 sind die beiden Lagen über einen drucksensitiven Klebstoff miteinander verbunden. Gemäß der US-A-5 709 310 sind die beiden Lagen über eine Schicht aus einem in der Hitze nicht reaktiven Kleber miteinander verbunden.It is known to use two-layer lid for closing containers, for example, to allow the required food for flavor protection. According to the US 2004/0013827 A1 the two layers are connected to each other via a pressure-sensitive adhesive. According to the US-A-5,709,310 the two layers are connected together by a layer of a non-reactive heat adhesive.

Weiters hat es sich gezeigt, dass insbesondere im Fall von verderblichen Lebensmitteln beim Konsumenten erhöhter Informationsbedarf betreffend Herkunft, Inhaltsstoffe sowie Haltbarkeit besteht. Um für diese Informationen ausreichend Raum zu schaffen, ist man dazu übergegangen, diese auf der äußeren Lage des Verschlussdeckels aufzudrucken, wogegen die innere Lage so weit als möglich unbedruckt bleibt. Dies auch deshalb, da ein möglicher Kontakt von Druckfarben mit den Lebensmitteln vermieden werden soll.Furthermore, it has been shown that, especially in the case of perishable foods, the consumer has an increased need for information regarding origin, ingredients and shelf life. In order to create sufficient space for this information, one has begun to print on the outer layer of the closure lid, whereas the inner layer remains as far as possible unprinted. This is also because a possible contact of printing inks with the food should be avoided.

Zum Öffnen dieser Packungen wird die obere Lage des Deckels abgezogen und erst nach dem Abtrennen der inneren, zweiten Lage ist der Zugriff zum Packungsgut möglich. Der Zugriff zum Packungsgut kann auch durch integrierte Grifflaschen, wie in der US 2004/0013827 A1 und der US-A-5 709 310 vorgeschlagen, erleichtert werden.To open these packs, the upper layer of the lid is removed and only after the separation of the inner, second layer, the access to the packaged goods is possible. The access to the packaged goods can also be achieved by integrated grip bottles, as in the US 2004/0013827 A1 and the US-A-5,709,310 be facilitated.

Gemäß der gattungsgemäßen US 2004/0013827 A1 wird weiters eine Ausgießöffnung beschrieben, welche durch materialmäßige Einschnitte oder Einprägungen in der dem Packungsgut zugewandten Lage beim Abschälen der Lagen gebildet wird. Diese Ausgießöffnung kann auch wiederverschlossen werden. Die Wiederverschließbarkeit dieser Packung wird durch eine zwischen den Lagen angebrachte Selbstklebeschicht bewirkt. Das Packungsgut ist im "wiederverschlossenem" Zustand zwar gegen das Eindringen von Verunreinigungen geschützt; ein Aromaschutz oder gar ein etwaiges Erwärmen des Packungsgutes ist jedoch nur bedingt möglich, da durch die materialmäßigen Trennungen in Form von Einschnitten Aroma und Packungsinhalt beim Erwärmen austreten können. Hier will die Erfindung Abhilfe schaffen.According to the generic US 2004/0013827 A1 Furthermore, a pouring opening is described, which is formed by material cuts or indentations in the packaged goods facing position during peeling of the layers. This pouring opening can also be resealed. The reclosability of this package is effected by a self-adhesive layer applied between the layers. The packaged goods are in the "resealed" state against the ingress of contaminants protected; However, an aroma protection or even a possible heating of the packaged goods is only possible to a limited extent, since aroma and pack contents can escape during heating due to the material-like separations in the form of incisions. The invention aims to remedy this situation.

Der vorliegenden Erfindung liegt daher die Aufgabe zu Grunde, ein deckelförmig ausgestanztes Element der eingangs genannten Art anzugeben, welches den Packungsinhalt zufriedenstellend konserviert, insbesondere was den Aromaschutz anbelangt, und welches in einem für den Konsumenten beim Öffnen leicht handhabbar ist.The present invention is therefore based on the object to provide a cover-shaped punched-out element of the type mentioned above, which satisfactorily preserves the contents of the package, in particular as regards the aroma protection, and which is easy to handle for the consumer when opening.

Erfindungsgemäß wird diese Aufgabe mit einem deckelförmig ausgestanzten Element der eingangs genannten Art gelöst, welches dadurch gekennzeichnet ist, dass die Sollbruchstellen in Form von Anstanzungen realisiert sind, durch welche beim Erwärmen von Mikrowellengerichten gegebenenfalls entstehende Dämpfe abweichen können.According to the invention this object is achieved with a lid-shaped punched-out element of the type mentioned above, which is characterized in that the predetermined breaking points are realized in the form of stampings, which may differ due to the heating of microwave dishes, possibly resulting vapors.

Weitere Ausgestaltungen des erfindungsgemäßen, deckelförmig ausgestanzten Elementes sind gemäß Unteransprüche geoffenbart.Further embodiments of the invention, cover-shaped punched element are disclosed according to the subclaims.

Die Erfindung wird im folgenden anhand von Fig.2 als mögliche Ausführungsform der Erfindung näher erläutert. Die Darstellungen gemäß Fig. 1 und 3 sind bekannte Ausführungsformen, wie sie in der US 2004/0013827 A1 offenbart sind.The invention is described below with reference to Fig.2 as a possible embodiment of the invention explained in more detail. The illustrations according to Fig. 1 and 3 are known embodiments, as shown in the US 2004/0013827 A1 are disclosed.

Bei der Herstellung des erfindungsgemäßen deckelförmig ausgestanzten Elementes 1 wird vorerst die äußere Lage 2 bzw. die innere Lage 3 hergestellt.In the production of the lid-shaped punched-out element 1 according to the invention, the outer layer 2 or the inner layer 3 is produced for the time being.

Für die Herstellung der äußeren Lage 2 wird beispielsweise eine Aluminiumfolie, deren Dicke in einem Bereich von 10 bis 100 µm liegt, verwendet. Es ist jedoch auch möglich, Kunststofffolien in einem Dickenbereich von 10 bis 100 µm einzusetzen. Die Kunststoffe können dabei aus der Gruppe Polypropylen, Polyethylen, Polyester, Polyacrylat, Polyamid oder Polystyrol ausgewählt werden.For the production of the outer layer 2, for example, an aluminum foil whose thickness is in a range of 10 to 100 microns is used. However, it is also possible to use plastic films in a thickness range of 10 to 100 microns. The plastics can be selected from the group consisting of polypropylene, polyethylene, polyester, polyacrylate, polyamide or polystyrene.

Die äußere Lage 2 kann weiters an ihrer dem Betrachter zugewandten Oberflächenseite mit einem Druckbild ausgestattet werden. Dieses kann in seiner Oberflächenausgestaltung sowohl glatt als auch rau sein. Die Oberflächenrauigkeit ergibt durch unregelmäßige, aber auch regelmäßige Anordnung der Druckmotive das gewünschte Druckbild. Weiters erleichtert die Oberflächenrauigkeit des Druckbildes das Entstapeln der üblicherweise in Magazinen übereinander aufbewahrten deckelförmig ausgestanzten Elemente.The outer layer 2 can further be equipped with a printed image on its surface side facing the observer. This may be both smooth and rough in its surface finish. The surface roughness results from irregular, but also regular arrangement of the print motifs the desired print image. Furthermore, the surface roughness of the printed image facilitates the unstacking of the usually stored in magazines stacked punched-out elements.

Das vorgenannte Druckbild kann jedoch auch jene Informationen wiedergeben, aus welchen der Konsument die Herkunft, Zusammensetzung und Dauer der Haltbarkeit des Packungsguts entnimmt.However, the aforementioned printed image can also reproduce the information from which the consumer takes the origin, composition and duration of the durability of the packaged goods.

Nach dem Bedrucken der äußeren Lage 2 wird diese an ihrer Oberflächenseite 2' mit einer kaltsiegelnden Schicht 4 versehen. Kaltsiegelnde Stoffe zeichnen sich dadurch aus, dass durch Anwendung von Druck, jedoch ohne zusätzliche Temperaturanwendung eine Verbundhaftung zwischen zwei Lagen hergestellt werden kann. Die kaltsiegelnde Schicht kann beispielsweise durch Auftragen einer polymerhältigen Emulsion oder Dispersion bereitgestellt werden. Als polymerhältige Emulsionen in wässriger Form können beispielsweise solche mit der Handelsbezeichnung "Crodaseal 22-055" eingesetzt werden, da diese den lebensmittelrechtlichen Bestimmungen entsprechen. Weiters ist es denkbar, eine ebenso lebensmittelverträgliche, weichmacherfreie Polymerdispersion auf Basis von Acrylsäureestercopolymeren in Wasser mit der Handelsbezeichnung "Flexbond®" AF75 einzusetzen.After printing on the outer layer 2, it is provided on its surface side 2 'with a cold-sealing layer 4. Cold-sealing substances are characterized by the fact that a bond between two layers can be produced by applying pressure, but without additional temperature application. The cold-sealing layer may be provided, for example, by applying a polymer-containing emulsion or dispersion. As polymer-containing emulsions in aqueous form, for example, those with the trade name "Crodaseal 22-055" can be used, since they comply with food law regulations. Furthermore, it is conceivable to use an equally food-compatible, plasticizer-free polymer dispersion based on acrylic acid ester copolymers in water with the trade name "Flexbond®" AF75.

Unabhängig vom vorgenannten Herstellungs- bzw. Kaschiervorgang der äußeren Lage 2 wird in einem weiteren Verfahrensschritt die dem Behälter zugewandte Lage 3 hergestellt bzw. vorbereitet. Diese besteht beispielsweise aus Kunststoffen in Mono- oder Verbundstruktur, wobei ein Dickenbereich von 10 bis 100 µm ausgewählt wird. Die Kunststoffe können dabei aus der Gruppe Polypropylen, Polyethylen, Polyester, Polyacrylat, Polyamid oder Polystyrol ausgewählt werden.Regardless of the aforementioned production or lamination process of the outer layer 2, the layer 3 facing the container is produced or prepared in a further method step. This consists for example of plastics in mono- or composite structure, wherein a thickness range of 10 to 100 microns is selected. The plastics can be selected from the group consisting of polypropylene, polyethylene, polyester, polyacrylate, polyamide or polystyrene.

Anschließend wird die innere, dem Behälter zugewandte Lage 3 an ihrer dem Behälter zugewandten Oberflächenseite 3' mit einer heißsiegelbaren Schicht 5 versehen. Diese kann beispielsweise aus einem Heißsiegellack oder einem peelfähigen Kunststofffilm ausgebildet werden. Weiters ist es denkbar, die heißsiegelbare Schicht 5 durch Coextrusionsbeschichtung aufzubringen. Maßgeblich ist es, dass durch Auswahl der heißsiegelbaren Verbindungen, ihrer chemischen Konstitution sowie ihres Vernetzungsgrades beim Heißsiegelvorgang eine Verbundhaftung zwischen der inneren Lage 3 und dem Behälterrand 8 derart erzeugt wird, dass diese größer ist als jene Verbundhaftung, die durch Maßgabe der kaltsiegelnden Schicht 4 zwischen den Lagen 2 und 3 des Deckelelementes erzeugt wird.Subsequently, the inner layer 3 facing the container is provided with a heat-sealable layer 5 on its surface side 3 'facing the container. This can be formed for example from a heat sealing lacquer or a peelable plastic film. Furthermore, it is conceivable to apply the heat-sealable layer 5 by coextrusion coating. Decisive is that through Selection of the heat-sealable compounds, their chemical constitution and degree of crosslinking in the heat-sealing process, a bond between the inner layer 3 and the container edge 8 is generated so that it is greater than the composite adhesion, by the Kaltsiegelnden layer 4 between the layers 2 and 3 of Cover element is generated.

Vorteilhaft ist es weiters, dass die heißsiegelbare Schicht 5 oberflächenrau ausgestaltet ist, da dies das Entstapeln der üblicherweise in Magazinen übereinander gelagerten Deckelelemente wesentlich erleichtert. Besonders vorteilhaft ist die Ausgestaltung der oberflächenrauen heißsiegelbaren Schicht 5 in Form geometrisch angeordneter Abstandshalter 6. Diese Abstandshalter schließen, bedingt durch ihre geometrische Anordnung, in den ebenso regelmäßig angeordneten Zwischenräumen Luft ein, sodass der vorgenannte Entstapelungsvorgang noch zusätzlich erleichtert ist. Der rasche Entstapelungsvorgang ist insbesondere dann von großem Vorteil, wenn, wie im Falle von verderblichen Lebensmitteln, diese beim Abpacken besonders sorgfältig und luftdicht verschlossen sein müssen.It is also advantageous that the heat-sealable layer 5 is designed to be surface-rough, since this substantially facilitates the destacking of the cover elements which are usually mounted one above the other in magazines. Particularly advantageous is the design of the surface-heat-sealable layer 5 in the form of geometrically arranged spacers 6. These spacers close, due to their geometric arrangement, in the equally regularly spaced spaces air, so that the aforementioned Entstapelungsvorgang is further facilitated. The rapid destacking process is particularly advantageous if, as in the case of perishable food, they must be particularly carefully and hermetically sealed during packaging.

Die aus dem Stand der Technik bekannte Ausführungsform gemäß Fig. 1 zeigt eine in sich geschlossene Oberfläche, wogegen die ebenso bekannte Ausführungsform nach Fig. 3 Perforierungen in Form einer Ausgießöffnung aufweist.The known from the prior art embodiment according to Fig. 1 shows a self-contained surface, whereas the well-known embodiment according to Fig. 3 Having perforations in the form of a pouring opening.

Die erfindungsgemäße Ausführungsform nach Fig. 2 hingegen weist Sollbruchstellen 10 auf. Diese werden durch Anstanzen erzeugt und dienen dazu, dass beispielsweise beim Erwärmen von Mikrowellengerichten gegebenenfalls entstehende Dämpfe abweichen können, ohne dass es zu einer Verschmutzung des Mikrowellenherdes kommt.The embodiment according to the invention Fig. 2 In contrast, predetermined breaking points 10. These are generated by punching and serve that, for example, when heating microwave dishes possibly resulting vapors may differ without causing contamination of the microwave oven.

Nach Herstellen bzw. Vorbereiten der äußeren Lage 2 bzw. der inneren Lage 3 werden diese über ihre einander zugewandten Oberflächenseiten 2' und 3' durch die kaltsiegelnde Schicht 4 in einem Kaltkaschiervorgang miteinander verbunden. Dies erfolgt beispielsweise in einer Kaschierstation bestehend im Wesentlichen aus einem Kaschierwalzenpaar, wobei die Lagen 2 und 3 jeweils an einer Walzenoberfläche derart aneinander herangeführt werden, dass die kaltsiegelnde Schicht 4, welche beispielsweise auf der Lage 2 angebracht ist, der Oberflächenseite 3' der Lage 3, welche über die zweite Kaschierwalze geführt wird, zugewandt ist. Bedingt durch den im Walzenspalt ausgebildeten Anpressdruck erfolgt bei Raumtemperatur über die kaltsiegelnde Schicht 4 eine klebende Verbindung über die Oberflächenseiten 2' und 3' der Lagen 2 und 3. Da der Kaschiervorgang bei Raumtemperatur erfolgt, verbleibt die heißsiegelbare Schicht 5 im desaktivierten Zustand, d.h. es erfolgen noch keine wie immer gearteten Vernetzungsreaktionen, welche eine in diesem Stadium unerwünschte Verbundhaftung bewirken.After preparing or preparing the outer layer 2 or the inner layer 3, these are connected to one another via their mutually facing surface sides 2 'and 3' by the cold-sealing layer 4 in a cold lamination process. This takes place, for example, in a laminating station consisting essentially of a pair of laminating rollers, wherein the layers 2 and 3 are respectively brought to one another on a roller surface such that the cold-sealing layer 4, which is for example mounted on the layer 2, the surface side 3 'of the layer 3 , which over the second laminating roller is guided, facing. Due to the pressure formed in the nip pressure occurs at room temperature on the cold-sealing layer 4 is an adhesive bond on the surface sides 2 'and 3' of the layers 2 and 3. Since the laminating at room temperature, the heat-sealable layer 5 remains in the deactivated state, ie no crosslinking reactions of any kind whatsoever take place which cause an undesired adhesion at this stage.

Die Lagen 2 und 3 sind nunmehr über ihre Oberflächen 2' und 3' durch die kaltsiegelnde Schicht 4 verbunden. Dieser Verbund wird als Rollenware gelagert, aus welcher die Elemente zum Verschließen in der entsprechenden Deckelform ausgestanzt werden können. Dabei kann ebenso an den kleberfreien Stellen die Ausbildung einer Öffnungshilfe, beispielsweise eine Grifflasche 9, 9', vorgesehen werden. Diese üblicherweise in Magazinen gelagerten Deckelelemente 1 können nunmehr für die weitere Verwendung, d.h. für das Verschließen von Behältern 7, eingesetzt werden. Nach dem Befüllen werden die Behälter 7 kontinuierlich mit den erfindungsgemäßen deckelförmig ausgestanzten Elementen 1 in einem Heißsiegelprozess verschlossen. Durch Anwendung von Druck bei erhöhter Temperatur erfolgt die Aktivierung der chemischen Verbindungen in der heißsiegelbaren Schicht 5 derart, dass eine Verbundhaftung in einem Bereich von größer gleich (≥) 5 N/15 mm (gemessen nach DIN EN 28510-1 "Schälprüfung für flexibel/starr geklebte Proben") zwischen dem Deckelelement 1 und dem Behälterrand 8 erzeugt wird. Diese Verbundhaftung bewirkt auch nach partieller Öffnung des Behälters 7, dass dieser zumindest teilweise luftdicht verschlossen ist. Zum Öffnen selbst wird die Grifflasche 9, welche sich in der äußeren Lage 2 befindet, angefasst, und in Richtung des Pfeiles F1 gezogen. Durch die erzeugte Anreißkraft wird die Verbundhaftung zwischen den Lagen 2 und 3 überwunden, sodass die äußere Lage 2 ganz oder teilweise von der darunter liegenden Lage 3 abgezogen werden kann. Damit bei diesem Öffnungsvorgang das Deckelelement 1 tatsächlich partiell abgeschält, d.h. gepeelt werden kann, liegt die Verbundhaftung zwischen der äußeren Lage 2 und der inneren Lage 3 in einem Bereich von 0,2 bis 4,5 N/15 mm (gemessen nach DIN EN 28510-1 "Schälprüfung für flexibel/starr geklebte Proben").The layers 2 and 3 are now connected via their surfaces 2 'and 3' by the cold-sealing layer 4. This composite is stored as a roll from which the elements can be punched out for closing in the appropriate lid shape. The formation of an opening aid, for example a gripping tab 9, 9 ', can also be provided at the glue-free areas. These cover elements 1, which are usually stored in magazines, can now be used for further use, i. for closing containers 7, are used. After filling, the containers 7 are closed continuously with the lid-shaped punched-out elements 1 according to the invention in a heat-sealing process. By application of pressure at elevated temperature, the activation of the chemical compounds in the heat-sealable layer 5 takes place in such a way that a composite adhesion in a range of greater than or equal to (5) / 15 mm (measured according to DIN EN 28510-1 "peel test for flexible / rigidly glued samples ") between the lid member 1 and the container edge 8 is generated. This composite adhesion causes even after partial opening of the container 7 that this is at least partially hermetically sealed. For opening itself, the grip tab 9, which is located in the outer layer 2, touched, and pulled in the direction of the arrow F1. As a result of the generated marking force, the bond between the layers 2 and 3 is overcome so that the outer layer 2 can be completely or partially removed from the underlying layer 3. Thus, in this opening operation, the lid member 1 actually partially peeled off, i. can be peeled, is the bond between the outer layer 2 and the inner layer 3 in a range of 0.2 to 4.5 N / 15 mm (measured according to DIN EN 28510-1 "peel test for flexible / rigidly bonded samples") ,

Um die durchschnittliche Schälkraft, welche eine Kenngröße für die Verbundhaftung einerseits zwischen dem Behälterrand 8 und der inneren Lage 3 sowie anderseits zwischen der äußeren Lage 2 und der inneren Lage 3 ist, messen zu können, werden zur Durchführung der Schälprüfung Proben der Verbundpartner, nämlich Behältermaterial und innere Lage 3 einerseits sowie innere Lage 3 und äußere Lage 2 andererseits, in Form von Teilverbunden hergestellt. Somit besteht erfindungsgemäß ein Teilverbund aus dem Behältermaterial 7, der heißsiegelbaren Schicht 5 und der inneren Lage 3 und der zweite Teilverbund aus der inneren Lage 3, der kaltsiegelbaren Schicht 4 und der äußeren Lage 2. Aus diesen Teilverbunden werden für die Schälprüfung in Laufrichtung 15 mm breite und ca. 300 mm lange Streifen geschnitten. Anschließend werden die Verbundpartner an den Enden der Proben von Hand voneinander getrennt, damit die freien Enden in die Klemmeinrichtung des Zugprüfgerätes, beispielsweise eines der Fa. Zwick, eingespannt werden können. Bei einer Abzugsgeschwindigkeit von 100 mm/min, einer Einspannlänge von max. 50 mm und einem Abzugswinkel von 90° erfolgt die weitere Prüfung. Das Messergebnis bzw. der Verlauf der Schälfestigkeit (Verbundhaftung) wird entweder am Zugprüfgerät abgelesen oder mit dem Diagrammschreiber aufgezeichnet. Aus den Ergebnissen jeder Versuchsserie werden die Mittelwerte in N/15mm errechnet.To the average peel force, which is a parameter for the composite adhesion on the one hand between the container edge 8 and the Inner layer 3 and on the other hand between the outer layer 2 and the inner layer 3 is to be able to measure the composite partners, namely container material and inner layer 3 on the one hand and inner layer 3 and outer layer 2 on the other hand, in the form of Partially made. Thus, according to the invention there is a partial composite of the container material 7, the heat-sealable layer 5 and the inner layer 3 and the second partial composite of the inner layer 3, the cold-sealable layer 4 and the outer layer 2. From these Teilverbunden be for the peel test in the direction of 15 mm wide and about 300 mm long strips cut. Subsequently, the composite partners are separated from each other at the ends of the samples by hand, so that the free ends can be clamped in the clamping device of the Zugprüfgerätes, for example one of the company. Zwick. At a withdrawal speed of 100 mm / min, a clamping length of max. 50 mm and a take-off angle of 90 °, the further examination. The measurement result or the course of the peel strength (composite adhesion) is either read on the tensile tester or recorded with the chart recorder. From the results of each series of experiments the mean values are calculated in N / 15mm.

Wie in Fig. 2c dargestellt, wird es erforderlich sein, die gesamte Lage 2 von der Lage 3 abzuziehen, da eine derartige Ausführungsform des erfindungsgemäßen Deckelelementes 1 zum Verschließen von Mikrowellenbehältern geeignet ist. Dabei soll die beispielsweise aus Aluminium bestehende Lage 2 vor dem Gebrauch in der Mikrowelle abgezogen werden, damit Aluminium den Durchgang der Mikrowellen nicht stört bzw. verhindert. Durch die Sollbruchstellen 10 können die beim Erwärmen entstehende Dämpfe entweichen, sodass ein Verschmutzen des Mikrowellenherdes unterbleibt.As in Fig. 2c shown, it will be necessary to deduct the entire layer 2 of the layer 3, since such an embodiment of the lid member 1 according to the invention is suitable for closing microwave containers. The existing example of aluminum layer 2 is to be deducted before use in the microwave, so that aluminum does not interfere with the passage of the microwaves or prevented. Due to the predetermined breaking points 10, the vapors produced during heating can escape, so that contamination of the microwave oven does not occur.

Zusammenfassend lässt sich sagen, dass sich durch die unterschiedliche Einstellung der Verbundhaftung zwischen den Lagen 2 und 3 des erfindungsgemäßen deckelförmig ausgestanzten Elementes einerseits und jener Verbundhaftung zwischen dem Behälterrand 8 und der Deckelelementoberfläche 3, ein Öffnungsmechanismus gezielt derart einleiten läßt, dass die Lagen 2, 3 des Deckelelementes 1 ganz oder teilwiese voneinander abgezogen werden können. Wird die äußere Lage 2 zur Gänze von der Lage 3 abgezogen, so werden die Sollbruchstellen 10 an der inneren Lage 3 freigelegt. Wird in dem Behälter 7 nunmehr Packungsgut, welches sich zum Erwärmen in Mikrowellenöfen eignet, gelagert, so können durch die freigelegten Sollbruchstellen 10 die beim Erwärmen üblichen Dämpfe entweichen, sodass ein unerwünschtes Verschmutzen des Mikrowellenofen unterbleibt.In summary, it can be said that by the different setting of the composite adhesion between the layers 2 and 3 of the lid-shaped punched-out element according to the invention on the one hand and that composite adhesion between the container edge 8 and the lid member surface 3, an opening mechanism can be deliberately initiated in such a way that the layers 2, 3rd the cover element 1 can be completely or partially deducted from each other. If the outer layer 2 is completely removed from the layer 3, the predetermined breaking points 10 on the inner layer 3 are exposed. Is now in the container 7 Packaged, which is suitable for heating in microwave ovens stored, so can escape through the exposed predetermined breaking points 10 the usual during heating vapors, so that an undesirable fouling of the microwave oven is omitted.

Claims (14)

  1. Element (1) which is stamped out in a lid form for sealing containers (7) for microwave dishes, comprising a first outer layer (2) and a second inner layer (3) which are connected to each other by a cold-sealing layer (4) via their side surfaces (2', 3') which are orientated towards each other, the second inner layer (3) being provided with a heat-sealable layer (5) on the side thereof which is orientated towards the container, and the interlayer adhesion between outer layer (2) and inner layer (3) being less than that between the inner layer (3) and the container edge (8) and the second inner layer (3) having predetermined breaking points (10),
    characterised in that the predetermined breaking points (10) are produced in the form of scorings, through which vapours which possibly are produced during heating of microwave dishes can escape.
  2. Element which is stamped out in a lid form according to claim 1,
    characterised in that the interlayer adhesion between outer layer (2) and inner layer (3) is between 0.2 to 4.5 N/15 mm, measured according to DIN EN 28510-1.
  3. Element which is stamped out in a lid form according to claim 1 or 2, characterised in that the interlayer adhesion between the inner layer (3) and the container edge (8) is greater than/equal to 5 N/15 mm, measured according to DIN EN 28510-1.
  4. Element which is stamped out in a lid form according to one of the claims 1 to 3, characterised in that the outer layer (2) and the inner layer (3) are present as mono- and/or composite materials.
  5. Element which is stamped out in a lid form according to one of the claims 1 to 4, characterised in that the outer layer (2) is a metal foil, preferably an aluminium foil.
  6. Element which is stamped out in a lid form according to claim 5,
    characterised in that the outer layer (2) is provided with an imprint.
  7. Element which is stamped out in a lid form according to claim 6,
    characterised in that the imprint is rough on the surface.
  8. Element which is stamped out in a lid form according to claim 7,
    characterised in that the imprint which is rough on the surface is present in the form of geometrically disposed spacers.
  9. Element which is stamped out in a lid form according to one of the claims 1 to 8, characterised in that the inner layer (3) comprises plastic materials.
  10. Element which is stamped out in a lid form according to claim 9,
    characterised in that the plastic materials are selected from the group polypropylene, polyethylene, polyester, polyacrylate, polyamide or polystyrene.
  11. Element which is stamped out in a lid form according to one of the claims 1 to 10, characterised in that inner layer (3) includes at least one layer made of paper.
  12. Element which is stamped out in a lid form according to one of the claims 1 to 11, characterised in that the heat-sealable layer (5) is rough on the surface.
  13. Element which is stamped out in a lid form according to claim 12,
    characterised in that the surface roughness is formed according to geometrically disposed spacers (6).
  14. Element which is stamped out in a lid form according to one of the claims 1 to 13, characterised in that, in at least one layer (2, 3), a bond-free region in the form of an opening aid, preferably a gripping tab (9, 9'), is provided.
EP05450022A 2004-03-18 2005-02-03 Two layer lid Active EP1577226B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP08011221A EP1961670B1 (en) 2004-03-18 2005-02-03 Two layer lid
SI200530856T SI1577226T1 (en) 2004-03-18 2005-02-03 Two layer lid
PL05450022T PL1577226T3 (en) 2004-03-18 2005-02-03 Two layer lid

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT4812004 2004-03-18
AT0048104A AT500261B8 (en) 2004-03-18 2004-03-18 TWO MANAGEMENT BOARD

Related Child Applications (1)

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EP08011221A Division EP1961670B1 (en) 2004-03-18 2005-02-03 Two layer lid

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EP1577226A1 EP1577226A1 (en) 2005-09-21
EP1577226B1 true EP1577226B1 (en) 2009-08-26

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US (1) US20050218143A1 (en)
EP (2) EP1577226B1 (en)
AT (4) AT500261B8 (en)
DE (2) DE502005007970D1 (en)
DK (1) DK1577226T3 (en)
ES (1) ES2328710T3 (en)
HR (1) HRP20090427T1 (en)
PL (1) PL1577226T3 (en)
SI (1) SI1577226T1 (en)

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AT7937U1 (en) 2005-11-15
DE502005007970D1 (en) 2009-10-08
ATE440790T1 (en) 2009-09-15
EP1961670B1 (en) 2010-11-17
AT500261B8 (en) 2007-02-15
EP1577226A1 (en) 2005-09-21
HRP20090427T1 (en) 2009-10-31
DK1577226T3 (en) 2009-12-14
ES2328710T3 (en) 2009-11-17
ATE488450T1 (en) 2010-12-15
SI1577226T1 (en) 2010-01-29
EP1961670A1 (en) 2008-08-27
AT500261B1 (en) 2006-09-15
AT500261A1 (en) 2005-11-15
DE502005010569D1 (en) 2010-12-30
US20050218143A1 (en) 2005-10-06
PL1577226T3 (en) 2010-06-30

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