EP2347972A1 - Resealable packaging - Google Patents

Resealable packaging Download PDF

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Publication number
EP2347972A1
EP2347972A1 EP11151841A EP11151841A EP2347972A1 EP 2347972 A1 EP2347972 A1 EP 2347972A1 EP 11151841 A EP11151841 A EP 11151841A EP 11151841 A EP11151841 A EP 11151841A EP 2347972 A1 EP2347972 A1 EP 2347972A1
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EP
European Patent Office
Prior art keywords
film
layer
sealing film
packaging according
packaging
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.)
Granted
Application number
EP11151841A
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German (de)
French (fr)
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EP2347972B1 (en
Inventor
Josef Ferber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Amcor Flexibles Kreuzlingen AG
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Hochland AG
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Publication of EP2347972A1 publication Critical patent/EP2347972A1/en
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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
    • 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
    • B65D77/2068—Means for reclosing the cover after its first opening
    • B65D77/2096—Adhesive means
    • 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
    • B65D2577/2041—Pull tabs
    • B65D2577/205—Pull tabs integral with the closure

Definitions

  • the invention relates to a resealable package for a product to be packaged, in particular for a present in single portions food, such as in a stack folded cheese or sausage slices, having a provided with an edge strip shell and having a adhering to the edge strip multilayer film lid, wherein the film lid has at least one top film and a sealing strip formed on the edge strip formed as a layer stack, wherein top film and sealing film are connected by means of an adhesive layer, wherein the sealing film has a predetermined breaking line at which the top film of parts of the sealing film dissolves when tearing the package.
  • the invention also relates to a method for packaging such a good and a method for applying a foil lid to a tray for producing such a package.
  • Such resealable film packages are known per se and are used for example for the packaging of wet wipes.
  • the advantage of this packaging is that the contents are protected by the reclosability from dehydration.
  • a foil packaging is for example from the WO 2005/123535 A1 known. This has from above through the top film and from below through the sealing film reaching through predetermined breaking lines in the form of perforations or notches on which dissolves the top film of the sealing film while retaining the area provided with pressure-sensitive adhesive area.
  • a pack with such resealable packaging in a fairly simple embodiment known.
  • the general problem with the hitherto known packaging is that the sealed before the first opening packaging is tight against moisture passage, but that it does not have sufficient tightness to gases, in particular oxygen, nitrogen or CO 2 .
  • This type of packaging is thus hardly suitable for permanently protecting perishable foods such as sausage or cheese. This is especially true because such foods are usually packed in a gas atmosphere and it is particularly important for the durability that the protective gas escapes as possible.
  • Object of the present invention is first to propose a resealable packaging high gas density, which can be produced by simple means that provides the goods packed therein great protection and is easy and comfortable to use by the user.
  • the invention is initially based on the essential idea that the top film forms a reliably stabilizing layer, the film lid a mechanical stiffness gives.
  • This requirement is inventively realized in that the top film is consistently homogeneous and has no predetermined breaking line to the outer edge of the edge strip.
  • This over the entire packaging "uninjured" top film offers the highest possible stability.
  • the top film can be formed by a single stable layer, for example made of plastic or paper, which can additionally be product-printed with a label and / or lacquered.
  • the further inventive concept lies in the special distribution of different adhesives within the adhesive layer.
  • This distribution is such that the adhesive layer has an inner central region, in which the upper film is adhesively bonded permanently to the sealing film by means of a permanent adhesive.
  • an outer edge region is further provided, in which, at least in the sections where the top film is to be detached from the sealing film, top film and sealing film are adhesively and reclosably glued to one another by means of a pressure-sensitive adhesive, in particular a PSA ("Pressure Sensitive Adhesive").
  • PSA Pressure Sensitive Adhesive
  • the predetermined breaking line in the film stack of the sealing film is now provided between the edge region and the central region, so that the permanent adhesive is located within the predetermined breaking line and the pressure-sensitive adhesive is outside the predetermined breaking line.
  • the predetermined breaking line would thus correspond to the boundary between the pressure-sensitive adhesive and the permanent adhesive. It is important to ensure that the predetermined breaking line does not hit the edge area provided with pressure-sensitive adhesive. It would, however, be unproblematic if it opens at the outer edge of the central area and thus still a little in the permanent adhesive. In this way, when tearing open the packaging, the top film with the sealing film in the central area remains arrested.
  • the predetermined breaking line according to the invention is formed by an embossment introduced in the sealing film, which layer of the Sealing film severed at least to the barrier layer.
  • This can be introduced mechanically or in a particular embodiment from below by means of a laser beam in the stack of top film and sealing film.
  • the packages according to the invention are optimized in terms of their gas density in the original closed state. In this way, a long shelf life of stored in the packaging food is possible.
  • the film stack forming the sealing film has a specially designed barrier layer which has a particular density in relation to the diffusion of oxygen, nitrogen or carbon dioxide.
  • a barrier layer For the construction of such a barrier layer, it is advisable to vaporize a metallization on a plastic layer.
  • an aluminum layer having a thickness of between 5 nm and 10 nm can be evaporated on a layer of PET (polyethylene terephthalate) become. It may be advantageous if this metallization forms the uppermost layer of the sealing film.
  • the predetermined rupture lines are then ideally brought so carefully "from below” to the metallization, that this is not penetrated but at best impressed and thus remains gas-tight.
  • the metallization may be covered by a further layer of polyamide in a particularly advantageous embodiment.
  • the vapor-deposited metallization within the barrier layer can also be replaced by a vapor-deposited oxide layer, in particular a layer of metal oxide, such as AlO x , or a layer of semiconductor oxide, in particular SiO x .
  • a correspondingly larger-sized plastic layer, in particular of polyamide, can be provided as the barrier layer.
  • the "film sandwich”, ie the stack of top film and sealing film are completed in advance as a film composite and can be supplied in a pre-assembled role for further use to the packaging machine.
  • the packaging machine which advantageously also molds and fills the trays during the packaging process, may then, in a step serving to close the trays, cover the filled trays with the prefabricated multilayer composite film and seal them to the edge strips of the trays.
  • Such a procedure is particularly effective and inexpensive.
  • PLA polylactide
  • a multilayer composite film accordingly comprises the top film and the sealing film provided with predetermined breaking lines.
  • Top film and Sealing film are now glued to each other by means of the various adhesive, that in those areas which constitute the central areas in the later finished packaging, a permanent adhesive is present, which connects the upper film and sealing film insoluble.
  • the upper film and the sealing film are detachably and reclosably connected by means of a pressure-sensitive adhesive in the regions which constitute edge regions in the subsequent packaging. Accordingly, tear tabs and connecting portions can be provided from the outset.
  • a packaging method for a particular sliced food such as a stack of cheese or sausage slices, with the following steps: First, in a first step, the composite material used to produce the shells to an arrangement of several over its edge region molded shells.
  • the composite material advantageously has a sealing layer, in particular of polyethylene.
  • the molding is done in particular by a thermoforming process.
  • the shells thus formed are then filled with the food.
  • the still connected and stocked trays are subsequently covered with the prefabricated multilayer composite film and sealed specifically to the edge strip.
  • the filled and closed shells are separated in a cutting process
  • FIG. 1 is first shown a section through a simple reclosable packaging in the closed state without inserted in it to be packaged Good.
  • This packaging comprises a shell 1 made of a composite material with a carrier layer made of plastic or aluminum and has a surrounding edge strip 2.
  • the shell 1 is closed by a multilayer foil lid 3.
  • the closure takes place by means of a seal, wherein a sealing layer 4 located on the edge strip 2 is heat-sealed by means of a sealing seam 5 against a likewise sealable film 14 which covers the foil lid 3 as the lowermost layer.
  • the sealing layer 4 and the film 14 are advantageously made of polyethylene.
  • the foil lid 3 consists of a stabilizing upper foil 6 and a sealing foil 7 lying on the marginal strip 2 by means of the sealing layer 4 and formed as a stack of individual layers. If required, the upper foil 6 can also be of multilayer design.
  • the upper film 1 is a stable carrier layer of oriented respectively stretched polypropylene of a thickness between 38 g / m 2 and 42 g / m 2 .
  • the sealing film 7 is therefore sealed with its underside on the edge region 2 of the shell 1.
  • the upper film 6 is connected to the sealing film 7 by means of an adhesive layer 8, wherein in the sealing film 7, for example by means of a laser beam introduced into the composite film predetermined breaking line 9 is provided at the top film 6 of edge regions of the sealing film 7 dissolves when tearing the package.
  • the predetermined breaking line 9 is formed by an embossment introduced in the sealing film and cuts through the sealing film as far as the barrier layer. It opens at the border between the pressure-sensitive adhesive and the Permanent adhesive.
  • the upper film 6 is homogeneously continuous to the outer edge of the edge strip 2 and accordingly has no predetermined breaking line.
  • the sealing film 7 is a composite of a bottom-lying sealable polyethylene film 14 and an overlying film layer 15 of polyethylene terephthalate (PET).
  • PET polyethylene terephthalate
  • a layer 16 of polyamide is provided above the PET film, through which the predetermined breaking line 9 passes.
  • the adhesive layer 8 has an inner central region 10, in which the upper film 6 is permanently bonded to the sealing film 7 with a permanent adhesive. With this permanent adhesive bonding, the sealing film 7 remains adhered to the upper film 6 within the framework of the central region, as soon as the packaging is opened and is on the predetermined breaking line 9 ( FIG. 2b ).
  • the adhesive layer 8 has an outer edge region 11, with the exception of a connecting portion 12 (FIG. FIG. 5 ) is provided in the edge region a re-closure enabling pressure-sensitive adhesive (PSA, "pressure sensitive adhesive").
  • PSA pressure sensitive adhesive
  • the embodiments described are provided with a barrier layer forming metallization 17, which is vapor-deposited as a thin film on the underlying PET film layer 15.
  • the packages are each shown in the opened state, in which the layer formed by the pressure-sensitive adhesive has separated into the layers 13a and 13b.
  • the predetermined breaking line 9 formed by laser cutting extends from below to the metallization 17, which is not intended to be completely penetrated.
  • the metallization 17 ruptures at the predetermined breaking line 9 only by the first opening.
  • FIG. 5 now a plan view of a finished package is shown as it is cut out of an arrangement of several packaging.
  • the central area 18, which has the permanent adhesive and is delimited by the predetermined breaking line 19, can be seen.
  • the predetermined breaking line 19 is formed by a laser cut, which extends between the points 20 and 21 around a large part of the central area 18.
  • the laser cut removes the connecting section 12, in which the upper film and the sealing film are permanently connected by means of the permanent adhesive.
  • the edge region 22 indicated by hatching is formed, in which the pressure-sensitive adhesive (PSA) enabling reclosure is provided.
  • PSA pressure-sensitive adhesive
  • the upper film forms a tear-open tab 23, wherein no adhesive is present between the sealing film and the tear-off tab formed by the upper film, but the sealing film is sealed to the edge region.
  • the tear tab 23 can be easily lifted.
  • the area of the circumferential seal between shell and sealing film is designated by 24. Not shown trough-like depressions can be introduced in the edge region of the shell, which form due to the recessed bottom against the edge of the seal excluded area. In this way, the tearing of the sealing film is simplified.
  • FIG. 6 For example, there is shown a prefabricated multilayer composite film for application to six preformed shells in this case.
  • the edge areas 26 connected by means of pressure-sensitive adhesive are represented.
  • the still connected and stocked trays are covered with this prefabricated multilayer composite film and sealed targeted to the edge strip 27. Finally, the filled and closed shells are separated in a cutting process.

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

Abstract

The package has a film cover (3) a sealing film (7) freely supported as a layer stack construction on edge strips (2) of a bowl (1), and a top film (6) extending to an outer edge of the edge strips. The top film and the sealing film are attached with each other by an adhesive layer (8). Permanent adhesive is provided on an inner central region (10) of the adhesive layer, and reclosure enabling pressure sensitive adhesive is provided on an outer boundary region (11) of the adhesive layer. A break line (9) is provided between the outer boundary region and the inner central region. The sealing film is provided with a barrier layer that is impermeable for air, oxygen and carbon dioxide. The barrier layer comprises an oxide layer e.g. aluminum oxide layer, silicon oxide layer and polyamide layer. The bowl is made of a composite material such as plastic. Independent claims are also included for the following: (1) a prefabricated multi-layer film for producing a resealable package (2) a method for packing sliced food products.

Description

Die Erfindung betrifft eine wiederverschließbare Verpackung für ein zu verpackendes Gut, insbesondere für ein in Einzelportionen vorliegendes Lebensmittel, wie in einem Stapel zusammengelegten Käse- oder Wurstscheiben, aufweisend eine mit einem Randstreifen versehene Schale und aufweisend einen auf dem Randstreifen haftenden mehrschichtigen Foliendeckel, wobei der Foliendeckel zumindest eine Oberfolie und eine auf dem Randstreifen aufliegende als Schichtstapel ausgebildete Abdichtfolie aufweist, wobei Oberfolie und Abdichtfolie vermittels einer Kleberschicht verbunden sind, wobei die Abdichtfolie eine Sollbruchlinie aufweist, an der sich beim Aufreißen der Verpackung die Oberfolie von Teilen der Abdichtfolie löst. Die Erfindung betrifft zudem ein Verfahren zur Verpackung eines solchen Gutes und ein Verfahren zur Aufbringung eines Foliendeckels auf eine Schale zur Herstellung einer solchen Verpackung.The invention relates to a resealable package for a product to be packaged, in particular for a present in single portions food, such as in a stack folded cheese or sausage slices, having a provided with an edge strip shell and having a adhering to the edge strip multilayer film lid, wherein the film lid has at least one top film and a sealing strip formed on the edge strip formed as a layer stack, wherein top film and sealing film are connected by means of an adhesive layer, wherein the sealing film has a predetermined breaking line at which the top film of parts of the sealing film dissolves when tearing the package. The invention also relates to a method for packaging such a good and a method for applying a foil lid to a tray for producing such a package.

Derartige wiederverschließbare Folienverpackungen sind an sich bekannt und werden beispielsweise für die Verpackung von Feuchttüchern benutzt. Der Vorteil dieser Verpackungen liegt darin, dass der Inhalt durch die Wiederverschließbarkeit vor Austrocknung geschützt ist. Eine solche Folienverpackungen ist beispielsweise aus der WO 2005/123535 A1 bekannt. Diese weist von oben durch die Oberfolie und von unten durch die Abdichtfolie hindurchreichende Sollbruchlinien in Form von Perforationen respektive von Einkerbungen auf, an denen sich die Oberfolie von der Abdichtfolie unter Verbleib des mit Haftkleber versehenen Bereiches löst. Auch aus der EP 1 103 488 A1 ist eine Packung mit einer solchermaßen wiederverschließbaren Verpackung in recht einfacher Ausführungsform bekannt.Such resealable film packages are known per se and are used for example for the packaging of wet wipes. The advantage of this packaging is that the contents are protected by the reclosability from dehydration. Such a foil packaging is for example from the WO 2005/123535 A1 known. This has from above through the top film and from below through the sealing film reaching through predetermined breaking lines in the form of perforations or notches on which dissolves the top film of the sealing film while retaining the area provided with pressure-sensitive adhesive area. Also from the EP 1 103 488 A1 is a pack with such resealable packaging in a fairly simple embodiment known.

Das generelle Problem bei den bislang bekannten Verpackungen liegt darin, dass die vor dem ersten Öffnen verschlossene Verpackung zwar dicht gegenüber Feuchtigkeitsdurchlass ist, dass sie jedoch keine ausreichende Dichtigkeit gegenüber Gasen, wie insbesondere Sauerstoff, Stickstoff oder CO2, aufweist. Diese Art der Verpackung ist somit kaum geeignet, um verderbliche Lebensmittel, wie Wurst oder Käse, dauerhaft zu schützen. Dies gilt vor allem deshalb, weil derartige Lebensmittel meist in Gasatmosphäre verpackt sind und es für die Haltbarkeit besonders wichtig ist, dass das schütze Gas möglichst nicht entweicht.The general problem with the hitherto known packaging is that the sealed before the first opening packaging is tight against moisture passage, but that it does not have sufficient tightness to gases, in particular oxygen, nitrogen or CO 2 . This type of packaging is thus hardly suitable for permanently protecting perishable foods such as sausage or cheese. This is especially true because such foods are usually packed in a gas atmosphere and it is particularly important for the durability that the protective gas escapes as possible.

Ein weiterer Augenmerk liegt auch auf der Herstellung und Verarbeitung des mehrschichtigen Foliendeckels und in dem Prozess des Verpackens an sich. Ein solcher Prozess ist in der WO 01/04020 A1 offenbart, wo der mehrschichtige Foliendeckel unmittelbar vor dem Aufbringen auf der Schale aus zwei einzelnen Folienlagen zusammen laminiert wird. Bei einem solch einfachen laminierenden Prozess ist es kaum möglich, dem Foliendeckel eine individuelle Funktionalität bezüglich des späteren Öffnens und der Wiederverschließbarkeit zu geben.Another focus is on the production and processing of the multi-layer film lid and in the process of packaging itself. Such a process is in the WO 01/04020 A1 discloses where the multilayer film lid is laminated together from two separate layers of film immediately prior to application to the tray. In such a simple laminating process, it is hardly possible to give the folio lid an individual functionality with regard to subsequent opening and reclosability.

Aufgabe der vorliegenden Erfindung ist es zunächst, eine wiederverschließbare Verpackung hoher Gasdichte vorzuschlagen, die sich mit einfachen Mitteln herstellen lässt, die dem darin verpackten Gut einen großen Schutz bietet und die vom Benutzer einfach und komfortabel zu handhaben ist. Zudem ist es Aufgabe der Erfindung, eine maschinell einfach zu verwendende Folie vorzuschlagen, mit der sich die erfindungsgemäße Verpackung realisieren lässt. Außerdem soll ein Verfahren zur Aufbringung des Foliendeckels auf eine Schale im Rahmen der Herstellung einer erfindungsgemäßen Verpackung vorgeschlagen werden.Object of the present invention is first to propose a resealable packaging high gas density, which can be produced by simple means that provides the goods packed therein great protection and is easy and comfortable to use by the user. In addition, it is an object of the invention to provide a mechanically easy-to-use film with which the packaging according to the invention can be realized. In addition, a method for applying the film lid to a shell in the context of the production of a package according to the invention to be proposed.

Diese Aufgaben werden durch die wiederverschließbare Verpackung mit den kennzeichnenden Merkmalen des Anspruch 1, die Folie nach Anspruch 18 und das Verfahren nach Anspruch 19 gelöst. Besondere Ausführungsformen sind in den jeweiligen Unteransprüchen genannt.These objects are achieved by the resealable package having the characterizing features of claim 1, the film of claim 18 and the method of claim 19. Particular embodiments are mentioned in the respective subclaims.

Der Erfindung liegt zunächst der wesentliche Gedanke zu Grunde, dass die Oberfolie eine zuverlässig stabilisierende Schicht bildet, die dem Foliendeckel eine mechanische Steifigkeit gibt. Diese Anforderung wird erfindungsgemäß dadurch realisiert, dass die Oberfolie durchgängig homogen ist und bis zum Außenrand des Randstreifens keine Sollbruchlinie aufweist. Diese über die gesamte Verpackung "unverletzte" Oberfolie bietet die höchst mögliche Stabilität. Dabei kann die Oberfolie von einer einzigen stabilen Schicht, beispielsweise aus Kunststoff oder Papier, gebildet sein, die produktspezifisch zusätzlich mit einem Label bedruckt und/oder lackiert sein kann.The invention is initially based on the essential idea that the top film forms a reliably stabilizing layer, the film lid a mechanical stiffness gives. This requirement is inventively realized in that the top film is consistently homogeneous and has no predetermined breaking line to the outer edge of the edge strip. This over the entire packaging "uninjured" top film offers the highest possible stability. In this case, the top film can be formed by a single stable layer, for example made of plastic or paper, which can additionally be product-printed with a label and / or lacquered.

Der weitere erfindungswesentliche Grundgedanke liegt in der speziellen Verteilung verschiedener Kleber innerhalb der Kleberschicht. Diese Verteilung ist derart, dass die Kleberschicht einen innen liegenden Zentralbereich aufweist, in dem die Oberfolie vermittels eines Permanentklebers dauerhaft mit der Abdichtfolie verklebt ist. Erfindungsgemäß ist weiter ein außen liegender Randbereich vorgesehen, in dem zumindest in den Abschnitten, wo sich die Oberfolie von der Abdichtfolie lösen soll, Oberfolie und Abdichtfolie vermittels eines Haftklebers, insbesondere eines PSA ("Pressure Sensitive Adhesive") lösbar und wiederverschließbar aufeinander geklebt sind. Ein solcher Haftkleber ermöglicht das mehrmalige Wiederverschließen der Verpackung durch Aufeinanderlegen von Oberfolie und Abdichtfolie.The further inventive concept lies in the special distribution of different adhesives within the adhesive layer. This distribution is such that the adhesive layer has an inner central region, in which the upper film is adhesively bonded permanently to the sealing film by means of a permanent adhesive. According to the invention, an outer edge region is further provided, in which, at least in the sections where the top film is to be detached from the sealing film, top film and sealing film are adhesively and reclosably glued to one another by means of a pressure-sensitive adhesive, in particular a PSA ("Pressure Sensitive Adhesive"). Such a pressure-sensitive adhesive makes it possible to reclose the packaging several times by placing the top film and sealing film on top of each other.

Die Sollbruchlinie im Folienstapel der Abdichtfolie ist nun zwischen dem Randbereich und dem Zentralbereich vorgesehen, so dass sich innerhalb der Sollbruchlinie der Permanentkleber und außerhalb der Sollbruchlinie der Haftkleber befindet. Die Sollbruchlinie entspräche damit der Grenze zwischen dem Haftkleber und dem Permanentkleber. Dabei ist darauf zu achten, dass die Sollbruchlinie nicht auf den mit Haftkleber versehenen Randbereich stößt. Es wäre hingegen unproblematisch, wenn sie am äußeren Rand des Zentralbereiches und damit noch ein wenig im Permanentkleber mündet. Auf diese Weise bleibt beim Aufreißen der Verpackung die Oberfolie mit der Abdichtfolie im Zentralbereich verhaftet.The predetermined breaking line in the film stack of the sealing film is now provided between the edge region and the central region, so that the permanent adhesive is located within the predetermined breaking line and the pressure-sensitive adhesive is outside the predetermined breaking line. The predetermined breaking line would thus correspond to the boundary between the pressure-sensitive adhesive and the permanent adhesive. It is important to ensure that the predetermined breaking line does not hit the edge area provided with pressure-sensitive adhesive. It would, however, be unproblematic if it opens at the outer edge of the central area and thus still a little in the permanent adhesive. In this way, when tearing open the packaging, the top film with the sealing film in the central area remains arrested.

Vorteilhaft ist es, dass die Sollbruchlinie erfindungsgemäß von einer in der Abdichtfolie eingebrachten Prägung gebildet wird, welche den Schichtenstapel der Abdichtfolie zumindest bis zur Barriereschicht durchtrennt. Diese kann mechanisch oder auch in einer besonderen Ausführungsform von unten mittels eines Laserstrahles in den Stapel aus Oberfolie und Abdichtfolie eingebracht werden.It is advantageous that the predetermined breaking line according to the invention is formed by an embossment introduced in the sealing film, which layer of the Sealing film severed at least to the barrier layer. This can be introduced mechanically or in a particular embodiment from below by means of a laser beam in the stack of top film and sealing film.

Eine solche Anordnung von durchgängiger Oberfolie und an der Klebergrenze mündender Sollbruchlinie hat im Gegensatz zu den bislang bekannten gattungsgemäßen Verpackungen den großen Vorteil der erhöhten Gasdichte. Es hat sich nämlich heraus gestellt, dass der Haftkleber wegen der Kapillarwirkung insbesondere gegen den Durchtritt von N2 oder CO2 nicht gasdicht ist und es über den Weg einer als Schlitz oder Perforierung ausgebildeten Sollbruchlinie durch die Schicht des Haftklebers hindurch zu einem unerwünschten Gasaustausch kommt. Da dieser Weg gegen den Durchtritt von Feuchtigkeit verschlossen ist, hat dieses Problem die Funktionalität der bekannten gattungsgemäßen Verpackungen bislang noch nicht beeinträchtigt. So waren die gattungsgemäßen Verpackungen im Hinblick auf eine möglichst kleine aber dennoch komfortable Entnahmeöffnung und damit auf eine geringe Verdunstung im geöffneten Zustand optimiert. Aus diesem Grunde war es bei den bekannten Verpackungen notwendig, eine Sollbruchlinie nicht nur "von unten" durch die Abdichtfolie, sondern auch "von oben" durch die Oberfolie vorzusehen, was nicht nur die Fertigung erschwert, sondern vor allem auch die Gasdichte stark mindert. Hingegen sind die erfindungsgemäßen Verpackungen bezüglich ihrer Gasdichte im original verschlossenen Zustand optimiert. Auf diese Weise ist eine lange Haltbarkeit der in der Verpackung gelagerten Lebensmittel möglich.Such an arrangement of continuous upper film and opening at the adhesive limit frangible line has in contrast to the previously known generic packaging the great advantage of increased gas density. It has in fact been found that the pressure-sensitive adhesive is not gas-tight due to the capillary action, in particular against the passage of N 2 or CO 2 , and undesirable gas exchange occurs through the layer of the pressure-sensitive adhesive through the path of a predetermined breaking line formed as a slot or perforation. Since this way is closed against the passage of moisture, this problem has not yet impaired the functionality of the known generic packaging. Thus, the generic packaging was optimized in terms of the smallest possible yet comfortable removal opening and thus to a low evaporation in the open state. For this reason, it was necessary in the known packaging to provide a rupture line not only "from below" through the sealing film, but also "from above" through the top film, which not only complicates the production, but above all greatly reduces the gas density. By contrast, the packages according to the invention are optimized in terms of their gas density in the original closed state. In this way, a long shelf life of stored in the packaging food is possible.

Dabei ist es im Hinblick auf die hohe Gasdichtigkeit besonders vorteilhaft, wenn der die Abdichtfolie bildende Schichtstapel eine besonders konzipierte Barriereschicht aufweist, die eine besondere Dichte gegenüber der Diffusion von Sauerstoff, Stickstoff oder Kohlendioxyd aufweist. Für den Aufbau einer solchen Barriereschicht bietet es sich an, auf eine Kunststoffschicht eine Metallisierung aufzudampfen. Beispielsweise kann auf eine Lage PET (Polyethylenterphthalat) eine Aluminiumschicht einer Dicke zwischen 5 nm und 10 nm aufgedampft werden. Dabei kann es von Vorteil sein, wenn diese Metallisierung die oberste Schicht der Abdichtfolie ausbildet. Die Sollbruchlinien werden dann idealerweise so vorsichtig "von unten" an die Metallisierung herangeführt, dass diese nicht durchdrungen sondern allenfalls angeprägt wird und damit gasdicht bleibt. Die Metallisierung kann in einer besonders vorteilhaften Ausführungsform von einer weiteren Lage Polyamid bedeckt sein.It is particularly advantageous in view of the high gas-tightness, when the film stack forming the sealing film has a specially designed barrier layer which has a particular density in relation to the diffusion of oxygen, nitrogen or carbon dioxide. For the construction of such a barrier layer, it is advisable to vaporize a metallization on a plastic layer. For example, an aluminum layer having a thickness of between 5 nm and 10 nm can be evaporated on a layer of PET (polyethylene terephthalate) become. It may be advantageous if this metallization forms the uppermost layer of the sealing film. The predetermined rupture lines are then ideally brought so carefully "from below" to the metallization, that this is not penetrated but at best impressed and thus remains gas-tight. The metallization may be covered by a further layer of polyamide in a particularly advantageous embodiment.

Die aufgedampfte Metallisierung innerhalb der Barriereschicht kann auch durch eine ebenfalls aufgedampfte Oxydschicht, insbesondere eine Schicht aus Metalloxyd, wie AlOx, oder eine Schicht aus Halbleiteroxyd, insbesondere SiOx, ersetzt werden. Alternativ dazu kann als Barriereschicht eine entsprechend stärker dimensionierte Kunststoffschicht, insbesondere aus Polyamid, vorgesehen werden.The vapor-deposited metallization within the barrier layer can also be replaced by a vapor-deposited oxide layer, in particular a layer of metal oxide, such as AlO x , or a layer of semiconductor oxide, in particular SiO x . Alternatively, a correspondingly larger-sized plastic layer, in particular of polyamide, can be provided as the barrier layer.

Eine weitere Besonderheit der erfindungsgemäßen Verpackung liegt darin, dass das "Foliensandwich", also der Stapel, aus Oberfolie und Abdichtfolie im Vorhinein als Folienverbund fertiggestellt werden und in einer vorkonfektionierten Rolle zur weiteren Verwendung an die Verpackungsmaschine geliefert werden kann. Die Verpackungsmaschine, die vorteilhafterweise während des Verpackungsprozess auch die Schalen formt und befüllt, kann dann in einem dem Verschließen der Schalen dienenden Schritt die gefüllten Schalen mit der vorgefertigten mehrlagigen Verbundfolie überdecken und diese an den Randstreifen der Schalen versiegeln. Eine solche Vorgehensweise ist besonders effektiv und kostengünstig. Im Rahmen dieses Folienverbundes können auch besonders biokompatible Kunststoffe, wie PLA ("Polylactid"), eingesetzt werden.Another special feature of the packaging according to the invention is that the "film sandwich", ie the stack of top film and sealing film are completed in advance as a film composite and can be supplied in a pre-assembled role for further use to the packaging machine. The packaging machine, which advantageously also molds and fills the trays during the packaging process, may then, in a step serving to close the trays, cover the filled trays with the prefabricated multilayer composite film and seal them to the edge strips of the trays. Such a procedure is particularly effective and inexpensive. In the context of this film composite, it is also possible to use particularly biocompatible plastics, such as PLA ("polylactide").

Allerdings ist dazu eine entsprechend vorgefertigte mehrlagige Verbundfolie notwendig, die zur Aufbringung auf eine vorgeformte Schale und damit zur Herstellung einer erfindungsgemäßen Verpackung insofern geeignet ist, als sie die notwendige Strukturierung innerhalb der Kleberschicht bezüglich der Verteilung von Permanentkleber und Haftkleber aber auch die Ausbildung einer Aufreißecke vorn herein beinhaltet. Eine solche mehrlagige Verbundfolie umfasst entsprechend die Oberfolie und die mit Sollbruchlinien versehene Abdichtfolie. Oberfolie und Abdichtfolie sind nun derart mittels der verschiedenen Kleber aufeinandergeklebt, dass in denjenigen Bereichen, die bei der späteren fertigen Verpackung die Zentralbereiche darstellen, ein Permanentkleber vorhanden ist, der Oberfolie und Abdichtfolie unlöslich verbindet. Hingegen sind die Oberfolie und die Abdichtfolie in den Bereichen, die bei der späteren Verpackung Randbereiche darstellen, mittels eines Haftklebers lösbar und wiederverschließbar verbunden. Entsprechend können Aufreißlaschen und Verbindungsabschnitte von vorn herein vorgesehen werden.However, to a correspondingly prefabricated multilayer composite film is necessary, which is suitable for application to a preformed shell and thus for the preparation of a package according to the invention, as they the necessary structuring within the adhesive layer with respect to the distribution of permanent adhesive and pressure sensitive adhesive but also the formation of a tear-on front includes in. Such a multilayer composite film accordingly comprises the top film and the sealing film provided with predetermined breaking lines. Top film and Sealing film are now glued to each other by means of the various adhesive, that in those areas which constitute the central areas in the later finished packaging, a permanent adhesive is present, which connects the upper film and sealing film insoluble. By contrast, the upper film and the sealing film are detachably and reclosably connected by means of a pressure-sensitive adhesive in the regions which constitute edge regions in the subsequent packaging. Accordingly, tear tabs and connecting portions can be provided from the outset.

Mit einer solchen Verbundfolie bietet sich ein Verpackungsverfahren für ein insbesondere in Scheiben vorliegende Lebensmittel, wie einen Stapel von Käse-oder Wurstscheiben, mit nachfolgenden Schritten an: Zunächst wird in einem ersten Schritt das zur Herstellung der Schalen eingesetzte Verbundmaterial zu einer Anordnung mehrerer über ihren Randbereich verbundener Schalen geformt. Dabei weist das Verbundmaterial vorteilhafterweise eine Siegelschicht, insbesondere aus Polyethylen, auf. Das Formen geschieht insbesondere durch einen Tiefziehprozess. In einem weiteren Schritt werden dann die derart geformten Schalen mit dem Lebensmittel bestückt. Die noch verbundenen und bestückten Schalen werden nachfolgend mit der vorgefertigten mehrlagigen Verbundfolie überdeckt und gezielt auf den Randstreifen versiegelt. Zuletzt werden die gefüllten und verschlossenen Schalen in einem Schneidvorgang vereinzeltWith such a composite film, a packaging method for a particular sliced food, such as a stack of cheese or sausage slices, with the following steps: First, in a first step, the composite material used to produce the shells to an arrangement of several over its edge region molded shells. The composite material advantageously has a sealing layer, in particular of polyethylene. The molding is done in particular by a thermoforming process. In a further step, the shells thus formed are then filled with the food. The still connected and stocked trays are subsequently covered with the prefabricated multilayer composite film and sealed specifically to the edge strip. Finally, the filled and closed shells are separated in a cutting process

Nachfolgend wird die Erfindung anhand der Figuren 1 bis 5 näher erläutert. Es zeigen:

Figur 1:
ein Schnitt durch eine einfache Verpackung,
Figur 2:
eine Verpackung mit einer weiteren Folienlage in Schnittansicht,
Figur 3:
eine Verpackung mit metallisierter Zwischenschicht in Schnittansicht,
Figur 4:
eine Verpackung mit metallisierter Zwischenschicht und weiterer Folienlage in Schnittansicht,
Figur 5:
eine Verpackung in Draufsicht und
Figur 6:
eine Verbundfolie.
The invention will be described below with reference to FIG FIGS. 1 to 5 explained in more detail. Show it:
FIG. 1:
a section through a simple packaging,
FIG. 2:
a packaging with a further film layer in sectional view,
FIG. 3:
a packaging with metallized intermediate layer in sectional view,
FIG. 4:
a packaging with metallized intermediate layer and further film layer in sectional view,
FIG. 5:
a packaging in plan view and
FIG. 6:
a composite foil.

In Figur 1 ist zunächst ein Schnitt durch eine einfache wiederverschließbare Verpackung in geschlossenem Zustand ohne darin eingelegtes zu verpackendes Gut schematisch dargestellt. Diese Verpackung weist eine Schale 1 aus einem Verbundmaterial mit einer Trägerschicht aus Kunststoff oder Aluminium auf und hat einen umgebenden Randstreifen 2. Die Schale 1 ist von einem mehrschichtigen Foliendeckel 3 verschlossen. Der Verschluss geschieht durch eine Versiegelung, wobei eine auf dem Randstreifen 2 befindliche Siegelschicht 4 gegen eine den Foliendeckel 3 als unterste Schicht bedeckende ebenfalls siegelfähige Folie 14 vermittels einer Siegelnaht 5 heißgesiegelt wird. Die Siegelschicht 4 und die Folie 14 sind vorteilhafterweise aus Polyethylen.In FIG. 1 is first shown a section through a simple reclosable packaging in the closed state without inserted in it to be packaged Good. This packaging comprises a shell 1 made of a composite material with a carrier layer made of plastic or aluminum and has a surrounding edge strip 2. The shell 1 is closed by a multilayer foil lid 3. The closure takes place by means of a seal, wherein a sealing layer 4 located on the edge strip 2 is heat-sealed by means of a sealing seam 5 against a likewise sealable film 14 which covers the foil lid 3 as the lowermost layer. The sealing layer 4 and the film 14 are advantageously made of polyethylene.

Der Foliendeckel 3 besteht aus einer stabilisierenden Oberfolie 6 und eine auf dem Randstreifen 2 vermittels der Siegelschicht 4 aufliegende und als Stapel einzelner Schichten ausgebildete Abdichtfolie 7. Die Oberfolie 6 kann bei Bedarf auch mehrschichtig ausgebildet werden. Im dargestellten Fall ist die Oberfolie 1 eine stabile Trägerschicht aus orientiertem respektive verstreckten Polypropylen einer Stärke zwischen 38 g/m2 und 42 g/m2. Die Abdichtfolie 7 ist daher mit ihrer Unterseite auf den Randbereich 2 der Schale 1 aufgesiegelt.The foil lid 3 consists of a stabilizing upper foil 6 and a sealing foil 7 lying on the marginal strip 2 by means of the sealing layer 4 and formed as a stack of individual layers. If required, the upper foil 6 can also be of multilayer design. In the illustrated case, the upper film 1 is a stable carrier layer of oriented respectively stretched polypropylene of a thickness between 38 g / m 2 and 42 g / m 2 . The sealing film 7 is therefore sealed with its underside on the edge region 2 of the shell 1.

Die Oberfolie 6 ist mit der Abdichtfolie 7 vermittels einer Kleberschicht 8 verbunden, wobei in der Abdichtfolie 7 eine beispielsweise mittels eines Laserstrahles in die Verbundfolie eingebrachte Sollbruchlinie 9 vorgesehen ist, an der sich beim Aufreißen der Verpackung die Oberfolie 6 von Randbereichen der Abdichtfolie 7 löst. Die Sollbruchlinie 9 wird von einer in der Abdichtfolie eingebrachten Prägung gebildet und durchtrennt die Abdichtfolie bis zur Barriereschicht. Sie mündet an der Grenze zwischen dem Haftkleber und dem Permanentkleber. Die Oberfolie 6 ist bis zum Außenrand des Randstreifens 2 homogen durchgängig und weist entsprechend keine Sollbruchlinie auf.The upper film 6 is connected to the sealing film 7 by means of an adhesive layer 8, wherein in the sealing film 7, for example by means of a laser beam introduced into the composite film predetermined breaking line 9 is provided at the top film 6 of edge regions of the sealing film 7 dissolves when tearing the package. The predetermined breaking line 9 is formed by an embossment introduced in the sealing film and cuts through the sealing film as far as the barrier layer. It opens at the border between the pressure-sensitive adhesive and the Permanent adhesive. The upper film 6 is homogeneously continuous to the outer edge of the edge strip 2 and accordingly has no predetermined breaking line.

Im Ausführungsbeispiel nach Figur 1 ist die Abdichtfolie 7 ein Verbund einer unten liegenden siegelfähigen Polyethylen Folie 14 und einer darüber aufgebrachten Folienlage 15 aus Polyethylenterephthalat (PET). Im Ausführungsbeispiel nach den Figuren 2 ist zusätzlich zu diesen Folienlagen über der PET Folie noch eine Lage 16 aus Polyamid vorgesehen, durch welche die Sollbruchlinie 9 hindurch geht.In the embodiment according to FIG. 1 the sealing film 7 is a composite of a bottom-lying sealable polyethylene film 14 and an overlying film layer 15 of polyethylene terephthalate (PET). In the embodiment of the Figures 2 In addition to these film layers, a layer 16 of polyamide is provided above the PET film, through which the predetermined breaking line 9 passes.

Die Kleberschicht 8 hat einen innen liegenden Zentralbereich 10, in dem die Oberfolie 6 mit einem permanent haftenden Kleber unlösbar mit der Abdichtfolie 7 verklebt ist. Mit dieser permanent haftenden Verklebung verbleibt die Abdichtfolie 7 im Rahmen des Zentralbereiches an der Oberfolie 6 verhaftet, sobald die Verpackung geöffnet wird und an der Sollbruchlinie 9 aufreist (Figur 2b). Zudem hat die Kleberschicht 8 einen außen liegenden Randbereich 11, wobei mit Ausnahme eines Verbindungsabschnittes 12 (Figur 5) im Randbereich ein den Wiederverschluss ermöglichender Haftkleber (PSA, "pressure sensitive adhesive") vorgesehen ist. Die Sollbruchlinie 9 mündet somit an der Grenze zwischen dem Randbereich 11 dem Zentralbereich 10. In Figur 2b ist mit 13a und 13b angedeutet, dass Teile des PSA im Randbereich jeweils an Oberfolie 6 und Abdichtfolie 7 verbleiben.The adhesive layer 8 has an inner central region 10, in which the upper film 6 is permanently bonded to the sealing film 7 with a permanent adhesive. With this permanent adhesive bonding, the sealing film 7 remains adhered to the upper film 6 within the framework of the central region, as soon as the packaging is opened and is on the predetermined breaking line 9 ( FIG. 2b ). In addition, the adhesive layer 8 has an outer edge region 11, with the exception of a connecting portion 12 (FIG. FIG. 5 ) is provided in the edge region a re-closure enabling pressure-sensitive adhesive (PSA, "pressure sensitive adhesive"). The predetermined breaking line 9 thus opens at the boundary between the edge region 11 and the central region 10 FIG. 2b is indicated with 13a and 13b, that parts of the PSA in the edge region in each case remain on top film 6 and 7 sealing film.

Entsprechend den Figuren 3 und 4 sind die beschriebenen Ausführungsbeispiele mit einer eine Barriereschicht bildenden Metallisierung 17 versehen, die als dünner Film auf die darunter liegende PET Folienlage 15 aufgedampft ist. Die Verpackungen sind jeweils im geöffneten Zustand gezeigt, in dem sich die von dem Haftkleber gebildete Schicht in die Schichten 13a und 13b getrennt hat. Die durch Laserschneiden gebildete Sollbruchlinie 9 reicht von unten bis an die Metallisierung 17 heran, die nicht komplett durchdrungen sein soll. Die Metallisierung 17 reißt an der Sollbruchlinie 9 erst durch das erste Öffnen auf.According to the FIGS. 3 and 4 the embodiments described are provided with a barrier layer forming metallization 17, which is vapor-deposited as a thin film on the underlying PET film layer 15. The packages are each shown in the opened state, in which the layer formed by the pressure-sensitive adhesive has separated into the layers 13a and 13b. The predetermined breaking line 9 formed by laser cutting extends from below to the metallization 17, which is not intended to be completely penetrated. The metallization 17 ruptures at the predetermined breaking line 9 only by the first opening.

In Figur 5 ist nunmehr eine Draufsicht auf eine fertige Verpackung gezeigt, wie sie aus einer Anordnung mehrerer Verpackung ausgeschnitten ist. Zu erkennen ist zunächst der den Permanentkleber aufweisende Zentralbereich 18, der begrenzt ist von der Sollbruchlinie 19. Die Sollbruchlinie 19 wird gebildet von einem Laserschnitt, der sich zwischen den Punkten 20 und 21 um einen Großteil des Zentralbereiches 18 erstreckt. Der Laserschnitt nimmt den Verbindungsabschnitt 12 aus, in dem die Oberfolie und die Abdichtfolie vermittels des Permanentklebers unlösbar verbunden sind. Jenseits der durch die Sollbruchlinie 19 gebildeten Grenze bildet sich der durch Schraffur angedeutete Randbereich 22 aus, in dem der den Wiederverschluss ermöglichende Haftkleber (PSA) vorgesehen ist. Über diesen Bereich kann die Verpackung wiederverschließbar geöffnet werden.In FIG. 5 now a plan view of a finished package is shown as it is cut out of an arrangement of several packaging. First of all, the central area 18, which has the permanent adhesive and is delimited by the predetermined breaking line 19, can be seen. The predetermined breaking line 19 is formed by a laser cut, which extends between the points 20 and 21 around a large part of the central area 18. The laser cut removes the connecting section 12, in which the upper film and the sealing film are permanently connected by means of the permanent adhesive. Beyond the boundary formed by the predetermined breaking line 19, the edge region 22 indicated by hatching is formed, in which the pressure-sensitive adhesive (PSA) enabling reclosure is provided. The packaging can be reopened via this area.

In der dem Verbindungsabschnitt 12 gegenüber liegenden Ecke bildet die Oberfolie eine Aufreißlasche 23 aus, wobei sich zwischen der Abdichtfolie und der von der Oberfolie gebildeten Aufreißlasche kein Kleber befindet, die Abdichtfolie jedoch an den Randbereich angesiegelt ist. So kann die Aufreißlasche 23 bequem abgehoben werden. Der Bereich der umlaufenden Siegelung zwischen Schale und Abdichtfolie ist mit 24 bezeichnet. Im Randbereich der Schale können nicht dargestellte muldenartige Vertiefungen eingebracht werden, die aufgrund des gegenüber dem Rand vertieften Bodens von der Siegelung ausgenommene Bereich bilden. Auf diese Weise wird das Aufreißen der Abdichtfolie vereinfacht.In the corner opposite the connecting section 12, the upper film forms a tear-open tab 23, wherein no adhesive is present between the sealing film and the tear-off tab formed by the upper film, but the sealing film is sealed to the edge region. Thus, the tear tab 23 can be easily lifted. The area of the circumferential seal between shell and sealing film is designated by 24. Not shown trough-like depressions can be introduced in the edge region of the shell, which form due to the recessed bottom against the edge of the seal excluded area. In this way, the tearing of the sealing film is simplified.

In Figur 6 ist eine vorgefertigte mehrlagige Verbundfolie zur Aufbringung auf in diesem Fall sechs vorgeformten Schalen gezeigt. Zu erkennen sind die Zentralbereiche 25, die mittels des Permanentklebers verbunden sind. Zudem sind die mittels Haftkleber verbunden Randbereiche 26 darstellt. Die noch verbundenen und bestückten Schalen werden mit dieser vorgefertigten mehrlagigen Verbundfolie überdeckt und gezielt auf den Randstreifen 27 versiegelt. Zuletzt werden die gefüllten und verschlossenen Schalen in einem Schneidvorgang vereinzelt.In FIG. 6 For example, there is shown a prefabricated multilayer composite film for application to six preformed shells in this case. Evident are the central regions 25, which are connected by means of the permanent adhesive. In addition, the edge areas 26 connected by means of pressure-sensitive adhesive are represented. The still connected and stocked trays are covered with this prefabricated multilayer composite film and sealed targeted to the edge strip 27. Finally, the filled and closed shells are separated in a cutting process.

Claims (19)

Wiederverschließbare Verpackung für ein zu verpackendes Gut insbesondere für ein in Scheiben vorliegendes Lebensmittel, wie Käse-oder Wurstscheiben, aufweisend eine mit einem Randstreifen (2) versehene Schale (1) und aufweisend einen auf dem Randstreifen (2) haftenden mehrschichtigen Foliendeckel (3), wobei der Foliendeckel (3) zumindest eine Oberfolie (6) und eine auf dem Randstreifen (2) aufliegende als Schichtstapelausgebildete Abdichtfolie (7) aufweist, wobei Oberfolie (6) und Abdichtfolie (7) vermittels einer Kleberschicht (8) verbunden sind, wobei die Abdichtfolie (7) eine Sollbruchlinie (9) aufweist, an der sich beim Aufreißen der Verpackung die Oberfolie (6) von Teilen der Abdichtfolie (7) löst,
dadurch gekennzeichnet,
dass die Oberfolie (6) bis zum Außenrand des Randstreifens (2) insofern durchgängig ist, als sie keine Sollbruchlinie aufeist,
dass die Kleberschicht (8) einen innen liegenden Zentralbereich (10) und einen außen liegenden Randbereich (11) aufweist, wobei im Zentralbereich (10) ein Permanentkleber und zumindest in Abschnitten des Randbereiches (11) ein den Wiederverschluss ermöglichender Haftkleber vorgesehen ist und wobei die Sollbruchlinie (9) zwischen dem Randbereich (11) dem Zentralbereich (10) vorgesehen ist.Reclosable package for a product to be packaged, in particular for a sliced foodstuff, such as cheese or sausage slices, comprising a shell (1) provided with an edge strip (2) and comprising a multilayer foil lid (3) adhering to the edge strip (2), the film cover (3) having at least one top film (6) and a sealing film (7) resting on the edge strip (2), the top film (6) and the sealing film (7) being connected by means of an adhesive layer (8) Sealing film (7) has a predetermined breaking line (9) at which the upper film (6) separates from parts of the sealing film (7) when the packaging is torn open,
characterized,
that the upper film (6) is continuous to the outer edge of the marginal strip (2) insofar as it has no predetermined breaking line,
that the adhesive layer (8) has an internal central region (10) and an outer edge region (11), wherein the central region (10) is a permanent adhesive and at least in portions of the edge region (11) the re-closure enables Direction pressure-sensitive adhesive is provided and wherein the Rupture line (9) between the edge region (11) is provided to the central region (10). Verpackung nach Anspruch 1,
dadurch gekennzeichnet,
dass beim Aufreißen der Verpackung die Oberfolie (6) mit der Abdichtfolie (7) im Zentralbereich (10) verhaftet bleibt.Packaging according to claim 1,
characterized,
that when tearing the packaging, the upper film (6) with the sealing film (7) in the central region (10) remains arrested. Verpackung nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
dass der Schichtstapel der Abdichtfolie (7) eine Barriereschicht zur Verhinderung von Gasdurchlass aufweiset, wobei die Barriereschicht insbesondere für Luft, Sauerstoff und Kohlendioxyd nahezu undurchlässig ist.Packaging according to claim 1 or 2,
characterized,
in that the layer stack of the sealing film (7) has a barrier layer for preventing gas passage, the barrier layer being virtually impermeable, in particular for air, oxygen and carbon dioxide. Verpackung nach Anspruch 3,
dadurch gekennzeichnet,
dass die Barriereschicht einer aufgedampfte Metallschicht (17), insbesondere aus Aluminium, aufweist.Packaging according to claim 3,
characterized,
that the barrier layer of a vapor-deposited metal layer (17), in particular of aluminum has. Verpackung nach Anspruch 4,
dadurch gekennzeichnet,
dass die Barriereschicht eine Oxydschicht, insbesondere einer Schicht aus Metalloxyd, wie AlOx, oder einer Schicht aus Halbleiteroxyd, insbesondere SiOx, oder einer Kunststoffschicht, insbesondere aus Polyamid, aufweist.Packaging according to claim 4,
characterized,
that the barrier layer comprises an oxide layer, in particular a layer of metal oxide, such as AlOx, or a layer of semiconductor oxide, in particular SiO x, or a plastic layer, in particular of polyamide. Verpackung nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet,
dass die Sollbruchlinie (9) der Grenze zwischen dem Haftkleber und dem Permanentkleber entspricht.Packaging according to one of the preceding claims,
characterized,
that the predetermined breaking line (9) corresponds to the boundary between the pressure-sensitive adhesive and the permanent adhesive. Verpackung nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet,
dass die Sollbruchlinie (9) von einer in der Abdichtfolie (7) eingebrachten Prägung gebildet wird, welche die Abdichtfolie (7) insbesondere zumindest bis zur Barriereschicht durchtrennt, ohne die Barriereschicht zu zerstören.Packaging according to one of the preceding claims,
characterized,
in that the predetermined breaking line (9) is formed by an embossment introduced in the sealing film (7) which cuts through the sealing film (7), in particular at least as far as the barrier layer, without destroying the barrier layer. Verpackung nach Anspruch 7,
dadurch gekennzeichnet,
dass die Sollbruchlinie (9) von einem von unten in den Stapel aus Oberfolie (6) und Abdichtfolie (7) mittels eines Laserstrahles eingebrachten Schnitt gebildet wird.Packaging according to claim 7,
characterized,
that the predetermined breaking line (9) is formed by a bottom in the stack of the upper film (6) and sealing film (7) introduced by means of a laser beam cut. Verpackung nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet,
dass der Stapel aus Oberfolie (6) und Abdichtfolie (7) eine von der Verpackungsmaschine vorgefertigte Folienverbund bildet.Packaging according to one of the preceding claims,
characterized,
that the stack of the upper film (6) and sealing film (7) forms a prefabricated composite film from the packaging machine. Verpackung nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet,
dass die Oberfolie eine stabile Trägerschicht bildet und insbesondere von einer orientierten, respektive verstreckten, Polypropylen-Folie gebildet wird, die insbesondere eine Stärke zwischen 38 g/m2 und 42 g/m2 aufweist.Packaging according to one of the preceding claims,
characterized,
that the upper film forms a stable carrier layer and in particular is formed by an oriented, respectively stretched, polypropylene film which in particular has a thickness of between 38 g / m 2 and 42 g / m 2 . Verpackung nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet,
dass der Schichtstapel der Abdichtfolie (7) eine mit dem Randstreifen (2) zu versiegelnde Siegelschicht (14), insbesondere aus Polyethylen, und eine Stabilisierungsschicht (15), insbesondere aus Polyester, aufweist.Packaging according to one of the preceding claims,
characterized,
that the layer stack of the sealing film (7) to be sealed sealing layer (14), in particular of polyethylene, and a stabilizing layer (15), in particular of polyester, has a with the edge strips (2). Verpackung nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet,
dass die Schale (2) aus einem Verbundmaterial ist, insbesondere aufweisend eine Trägerschicht aus Kunststoff oder Aluminium, wobei die obere Lage des Verbundmaterials eine siegelfähige Schicht ist.Packaging according to one of the preceding claims,
characterized,
in that the shell (2) is made of a composite material, in particular comprising a carrier layer made of plastic or aluminum, wherein the upper layer of the composite material is a sealable layer. Verpackung nach Anspruch 12,
dadurch gekennzeichnet
dass die Abdichtfolie (7) mit ihrer der Barriereschicht abgewandten Unterseite auf den Randbereich (2) der Schale (1) aufgesiegelt ist.Packaging according to claim 12,
characterized
that the sealing film (7) is sealed with its underside facing away from the barrier layer on the edge region (2) of the shell (1). Verpackung nach Anspruch 13,
dadurch gekennzeichnet
dass in den Randbereich (2) der Schale muldenartige Vertiefungen eingebracht sind, die von der Siegelung ausgenommene Bereich bilden.Packaging according to claim 13,
characterized
that in the edge region (2) of the shell trough-like depressions are introduced, which form the area excluded from the seal. Verpackung nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet
dass die Oberfolie eine Aufreißlasche (23) ausbildet, wobei sich zwischen der Abdichtfolie und der Aufreißlasche (23) kein Kleber befindet.Packaging according to one of the preceding claims,
characterized
that the upper film has a tear-open flap (23) forms, in which there is no adhesive between the sealing film and the tear-open flap (23). Verpackung nach Anspruch 15,
dadurch gekennzeichnet
dass der Außenrand der Abdichtfolie mit dem Randbereich der Schale versiegelt ist, um ein Abheben der von der Oberfolie gebildeten Aufreißlasche zu ermöglichen.Packaging according to claim 15,
characterized
that the outer edge of the sealing film is sealed to the edge region of the shell to allow lifting of the pull tab formed by the upper film. Verpackung nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet
dass die Oberfolie und die Abdichtfolie in einem Verbindungsabschnitt des Randbereiches mittels des Permanentklebers verbunden sind.Packaging according to one of the preceding claims,
characterized
that the upper film and the sealing film are connected in a connecting portion of the edge region by means of the permanent adhesive. Vorgefertigte mehrlagige Folie zur Aufbringung auf eine vorgeformte Schale zur Herstellung einer Verpackung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet,
dass die mehrlagige Folie eine Oberfolie und eine mit Sollbruchlinien versehene Abdichtfolie aufweist, wobei die Oberfolie und die Abdichtfolie in vorgegebenen Bereichen, die später die Zentralbereiche darstellen, mittels eines Permanentklebers verbunden sind und dass die Oberfolie und die Abdichtfolie in anderen Bereichen, die später die Randbereiche darstellen, mittels eines Haftklebers verbunden sind.Prefabricated multilayer film for application to a preformed shell for producing a packaging according to one of the preceding claims, characterized
that the multilayer film has a top film and a sealing film provided with predetermined breaking lines, wherein the top film and the sealing film are connected in predetermined areas, which later represent the central areas, by means of a permanent adhesive and in that the top film and the sealing film in other areas, which later the edge areas represent, are connected by means of a pressure-sensitive adhesive. Verfahren zur Verpackung eines insbesondere in Scheiben vorliegenden Lebensmittels, wie eines Stapels von Käse- oder Wurstscheiben, mit einer wiederverschließbaren Verpackung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet,
dass in einem ersten Schritt das Verbundmaterial zu einer Anordnung über ihren Randbereich verbundener Schalen geformt wird,
dass in einem weiteren Schritt die geformten Schalen mit dem lebensmittel befüllt werden,
dass in einem weiteren Schritt die gefüllten Schalen mit der vorgefertigten mehrlagigen Folie überdeckt und an den Randstreifen versiegelt werden, dass in einem weiteren Schritt die gefüllten und verschlossenen Schalen vereinzelt werden.Method for packaging a food, in particular sliced, such as a stack of cheese or sausage slices, with a resealable packaging according to one of the preceding claims, characterized
that in a first step the composite material is formed into an arrangement over its edge region of connected shells,
that in a further step the shaped trays are filled with the food,
that in a further step, the filled trays are covered with the prefabricated multilayer film and sealed to the edge strips, that in a further step, the filled and closed trays are separated.
EP11151841.1A 2010-01-22 2011-01-24 Resealable packaging Active EP2347972B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010005554A DE102010005554A1 (en) 2010-01-22 2010-01-22 Resealable packaging

Publications (2)

Publication Number Publication Date
EP2347972A1 true EP2347972A1 (en) 2011-07-27
EP2347972B1 EP2347972B1 (en) 2021-09-22

Family

ID=43877011

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11151841.1A Active EP2347972B1 (en) 2010-01-22 2011-01-24 Resealable packaging

Country Status (3)

Country Link
EP (1) EP2347972B1 (en)
DE (2) DE102010005554A1 (en)
ES (1) ES2899659T3 (en)

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WO2016131741A1 (en) 2015-02-20 2016-08-25 Amcor Flexibles Burgdorf Gmbh Reclosable packaging
WO2016131740A1 (en) 2015-02-20 2016-08-25 Amcor Flexibles Burgdorf Gmbh Reclosable packaging
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WO2015085041A1 (en) * 2013-12-06 2015-06-11 Sonoco Products Co. Peel-away shaker can and can membrane
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US10486870B2 (en) 2013-12-06 2019-11-26 Sonoco Development, Inc. Peel-away shaker can and can membrane
WO2016131742A1 (en) 2015-02-20 2016-08-25 Amcor Flexibles Burgdorf Gmbh Reclosable packaging
WO2016131741A1 (en) 2015-02-20 2016-08-25 Amcor Flexibles Burgdorf Gmbh Reclosable packaging
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US10661548B2 (en) 2015-11-25 2020-05-26 Tarkett Gdl Method for producing a resilient floor covering with a printed decorative layer
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WO2019079133A1 (en) * 2017-10-16 2019-04-25 Sonoco Development, Inc. Resealable lidding with patterned adhesive
WO2020225618A1 (en) * 2019-05-09 2020-11-12 K.Gkikas & Co Lp Multi-layer covers with detachable segment and method of their production

Also Published As

Publication number Publication date
ES2899659T3 (en) 2022-03-14
DE102010005554A1 (en) 2011-07-28
DE202011109904U1 (en) 2012-07-02
EP2347972B1 (en) 2021-09-22

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