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EP2347972B1 - Emballage refermable - Google Patents

Emballage refermable Download PDF

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Publication number
EP2347972B1
EP2347972B1 EP11151841.1A EP11151841A EP2347972B1 EP 2347972 B1 EP2347972 B1 EP 2347972B1 EP 11151841 A EP11151841 A EP 11151841A EP 2347972 B1 EP2347972 B1 EP 2347972B1
Authority
EP
European Patent Office
Prior art keywords
film
layer
sealing film
packaging according
sealing
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.)
Active
Application number
EP11151841.1A
Other languages
German (de)
English (en)
Other versions
EP2347972A1 (fr
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
Original Assignee
Amcor Flexibles Kreuzlingen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Amcor Flexibles Kreuzlingen AG filed Critical Amcor Flexibles Kreuzlingen AG
Publication of EP2347972A1 publication Critical patent/EP2347972A1/fr
Application granted granted Critical
Publication of EP2347972B1 publication Critical patent/EP2347972B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B65D77/2068—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 packaging according to one of claims 1 to 13 and a prefabricated multi-layer film according to claim 14.
  • Such resealable film packaging 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 from drying out thanks to the resealability.
  • Such a film packaging is for example from WO 2005/123535 A1 known. This has predetermined breaking lines extending through the top film from above and through the sealing film from below in the form of perforations or notches at which the top film detaches from the sealing film while the area provided with pressure-sensitive adhesive remains. Also from the EP 1 103 488 A1 and the US 2005/0276525 A1 a pack with such a reclosable packaging in a very simple embodiment is known.
  • the general problem with the previously known packaging is that the packaging closed before the first opening is tight against moisture permeability, but that it does not have sufficient tightness against gases, such as in particular oxygen, nitrogen or CO 2 .
  • This type of packaging is therefore hardly suitable for permanently protecting perishable foods such as sausage or cheese. This is especially true because such foods are usually packaged in a gas atmosphere and it is particularly important for the shelf life that the protected gas does not escape as far as possible.
  • U.S. 4,735,335 discloses a tape with lids for flat edged thermoplastic containers comprising a first tape made of aluminum and a second thermoplastic tape.
  • the object of the present invention is first of all to propose a resealable packaging with a high gas density which can be produced with simple means, which offers the goods packaged therein great protection and which is easy and convenient for the user to handle.
  • a method for applying the film cover to a tray in the context of the production of a packaging according to the invention is to be proposed.
  • the invention is initially based on the essential idea that the upper film forms a reliably stabilizing layer that is attached to the film cover mechanical rigidity there. According to the invention, this requirement is realized in that the upper film is homogeneous throughout and has no predetermined breaking line up to the outer edge of the edge strip. This upper film, which is "undamaged" over the entire packaging, offers the highest possible stability. According to the invention, the top film is formed by a single stable layer of oriented polypropylene film with a thickness between 38 g / m2 and 42 g / m2, which can also be printed and / or lacquered with a label specific to the product.
  • the further fundamental idea that is essential to the invention lies in the special distribution of different adhesives within the adhesive layer.
  • This distribution is such that the adhesive layer has an inner central area in which the upper film is permanently bonded to the sealing film by means of a permanent adhesive.
  • an outer edge area is also provided, in which, at least in the sections where the upper film is to detach from the sealing film, the upper film and the sealing film are releasably and resealably 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 foil stack of the sealing foil is now provided between the edge area and the central area, so that the permanent adhesive is located within the predetermined breaking line and the pressure sensitive adhesive is located outside the predetermined breaking line.
  • the predetermined breaking line would thus correspond to the boundary between the pressure-sensitive adhesive and the permanent adhesive. Care must be taken that the predetermined breaking line does not come into contact with the edge area provided with adhesive. On the other hand, it would be unproblematic if it ends at the outer edge of the central area and thus a little bit in the permanent adhesive. In this way, when the packaging is torn open, the upper film remains adhered to the sealing film in the central area.
  • the predetermined breaking line is formed by an embossing made in the sealing film, which softens the stack of layers Sealing foil cut through at least up to the barrier layer.
  • This can be introduced mechanically or, in a special embodiment, from below by means of a laser beam into the stack of upper film and sealing film.
  • the packaging according to the invention is optimized with regard to its gas density in the originally closed state. This enables the food stored in the packaging to have a long shelf life.
  • the layer stack forming the sealing film has a specially designed barrier layer which has a particular density with respect to the diffusion of oxygen, nitrogen or carbon dioxide.
  • a barrier layer For the construction of such a barrier layer, it is advisable to vapor-deposit a metallization onto a plastic layer.
  • a plastic layer For example, an aluminum layer with a thickness between 5 nm and 10 nm can be vapor-deposited onto a layer of PET (polyethylene terephthalate) will. It can be advantageous if this metallization forms the top layer of the sealing film.
  • the predetermined breaking lines are then ideally brought up to the metallization "from below” so carefully that it is not penetrated, but is at most embossed and thus remains gas-tight.
  • the metallization can be covered by a further layer of polyamide.
  • the vapor-deposited metallization within the barrier layer can also be replaced by a likewise 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 thicker plastic layer, in particular made of polyamide, can be provided as the barrier layer.
  • the "film sandwich", i.e. the stack, made up of the upper film and the sealing film can be finished in advance as a film composite and delivered to the packaging machine in a pre-assembled roll for further use.
  • the packaging machine which advantageously also forms and fills the trays during the packaging process, can then cover the filled trays with the prefabricated multilayer composite film in a step serving to close the trays and seal them on the edge strips of the trays.
  • Such a procedure is particularly effective and inexpensive.
  • Particularly biocompatible plastics, such as PLA (“polylactide”) can also be used within the framework of this film composite.
  • an appropriately prefabricated multilayer composite film is necessary for this, which is suitable for application to a preformed shell and thus for the production of packaging according to the invention insofar as it provides the necessary structuring within the adhesive layer with regard to the distribution of permanent adhesive and pressure sensitive adhesive, but also the formation of a tear corner at the front in includes.
  • Such a multilayer composite film accordingly comprises the top film and the sealing film provided with predetermined breaking lines.
  • Upper film and Sealing foils are now glued to one another by means of the various adhesives in such a way that a permanent adhesive is present in those areas that represent the central areas in the later finished packaging, which permanently connects the upper foil and the sealing foil Later packaging represent edge areas, releasably and resealably connected by means of a pressure-sensitive adhesive. Accordingly, tear tabs and connecting sections can be provided from the start.
  • a packaging method for a food in particular in slices offers the following steps: First, in a first step, the composite material used to produce the shells is arranged in several over their edge area connected shells.
  • the composite material advantageously has a sealing layer, in particular made of polyethylene. Shaping takes place in particular by means of a deep-drawing process.
  • the bowls shaped in this way are then equipped with the food.
  • the shells that are still connected and equipped are then covered with the prefabricated multilayer composite film and specifically sealed on the edge strip. Finally, the filled and closed shells are separated in a cutting process.
  • FIG. 1 a section through a simple resealable packaging in the closed state without any goods to be packaged inserted therein is shown schematically.
  • This packaging has 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 film cover 3.
  • the closure takes place by means of a seal, with a sealing layer 4 located on the edge strip 2 being heat-sealed against a likewise sealable film 14, which covers the film lid 3 as the lowest layer, by means of a sealing seam 5.
  • the sealing layer 4 and the film 14 are advantageously made of polyethylene.
  • the foil lid 3 consists of a stabilizing upper film 6 and the sealing layer 4 overlying and individual as stack layers one by means of the edge strip 2 formed sealing film 7.
  • the upper film 1 a stable carrier layer of oriented respectively oriented polypropylene of a thickness of between 38 g / m 2 and 42 g / m 2 .
  • the sealing film 7 is therefore sealed with its underside onto the edge region 2 of the shell 1.
  • the top film 6 is connected to the sealing film 7 by means of an adhesive layer 8, a predetermined breaking line 9 being provided in the sealing film 7, for example by means of a laser beam, on which the top film 6 detaches from the edge areas of the sealing film 7 when the packaging is torn open.
  • the predetermined breaking line 9 is formed by an embossing made in the sealing film and cuts through the sealing film up to the barrier layer. It ends at the boundary between the adhesive and the Permanent glue.
  • the upper film 6 is homogeneously continuous up 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 sealable polyethylene film 14 located below and a film layer 15 made of polyethylene terephthalate (PET) applied over it.
  • a layer 16 made of polyamide is provided over the PET film, through which the predetermined breaking line 9 passes.
  • the adhesive layer 8 has an inner central area 10 in which the upper film 6 is permanently bonded to the sealing film 7 with a permanent adhesive. With this permanently adhesive bond, the sealing film 7 remains attached to the upper film 6 in the frame of the central area as soon as the packaging is opened and tears open at the predetermined breaking line 9 ( Figure 2b ).
  • the adhesive layer 8 has an outer edge area 11, with the exception of a connecting section 12 ( Figure 5 ) a pressure sensitive adhesive (PSA) is provided in the edge area which enables reclosure.
  • PSA pressure sensitive adhesive
  • the exemplary embodiments described are provided with a metallization 17 which forms a barrier layer and which is vapor-deposited as a thin film on the PET film layer 15 located below.
  • the packages are each shown in the opened state, in which the layer formed by the pressure-sensitive adhesive has separated into layers 13a and 13b.
  • the predetermined breaking line 9 formed by laser cutting extends from below to the metallization 17, which should not be completely penetrated.
  • the metallization 17 only tears open at the breaking line 9 when it is opened for the first time.
  • FIG. 5 a plan view of a finished package is now shown as it is cut out from an arrangement of several packages.
  • the central area 18 having the permanent adhesive can be seen, which is delimited by the predetermined breaking line 19.
  • 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 takes out 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, with no adhesive being located between the sealing film and the tear-open tab formed by the upper film, but the sealing film being sealed to the edge area. In this way, the pull tab 23 can be easily lifted off.
  • the area of the circumferential seal between the shell and the sealing film is denoted by 24.
  • trough-like depressions (not shown) can be made which, due to the bottom that is recessed with respect to the edge, form areas which are excluded from the seal. In this way, tearing open the sealing film is simplified.
  • FIG. 6 a prefabricated multilayer composite film is shown for application to, in this case, six preformed trays.
  • the central areas 25, which are connected by means of the permanent adhesive, can be seen.
  • the edge regions 26 connected by means of pressure-sensitive adhesive are shown.
  • the shells that are still connected and equipped are covered with this prefabricated multilayer composite film and specifically sealed onto 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)

Claims (14)

  1. Emballage refermable pour un produit destiné à être emballé, en particulier un aliment en tranches, comme des tranches de fromage ou de saucisses, comprenant une barquette (1) munie d'une bande de bordure (2) et comprenant un couvercle en film (3) multicouche adhérant à la bande de bordure (2), dans lequel le couvercle en film (3) comprend au moins un film supérieur (6) et un film de scellement (7) prenant la forme d'une pile de couche résidant sur la bande de bordure (2), dans lequel le film supérieur (6) et le film de scellement (7) sont reliés au moyen d'une couche adhésive (8), dans lequel le film de scellement (7) a une ligne de rupture prédéterminée (9), et dans lequel le film supérieur (6) se détache de parties du film de scellement (7) à l'intérieur de la couche adhésive (8) quand l'emballage est ouvert par arrachage,
    et le film supérieur (6) est homogène de manière continue jusqu'à la bordure externe de la bande de bordure (2), et n'a pas de ligne de rupture prédéterminée jusqu'à la bordure externe de la bande de bordure, de sorte que la couche adhésive (8) a une région centrale intérieure (10) et une région de bordure extérieure (11), dans lequel un adhésif permanent est disposé dans la région centrale (10), et, au moins dans des sections de la région de bordure (11) est disposé un adhésif sensible à la pression permettant la refermeture, et dans lequel la ligne de rupture prédéterminée (9) est disposée entre la région de bordure (11) et la région centrale (10), et dans lequel, quand l'emballage est ouvert par arrachage, le film supérieur (6) reste adhéré sur le film de scellement (7) dans la région centrale (10), caractérisé en ce que le film supérieur (6) forme une couche de support stable et est formé par un film de polypropylène orienté ou étiré, respectivement, ayant une épaisseur comprise entre 38 g/m2 et 42 g/m2.
  2. Emballage selon la revendication 1, caractérisé en ce que la pile de couche du film de scellement (7) possède une couche barrière pour empêcher le passage de gaz, la couche barrière étant imperméable en particulier à l'air, l'oxygène et au dioxyde de carbone.
  3. Emballage selon la revendication 2, caractérisé en ce que la couche barrière possède une couche métallique (17) déposée en phase vapeur, en particulier d'aluminium.
  4. Emballage selon la revendication 3, caractérisé en ce que la couche barrière possède une couche d'oxyde, en particulier une couche d'oxyde métallique, comme AlOx, ou une couche d'oxyde semi-conducteur, en particulier SiOx, ou une couche de plastique, en particulier de polyamide.
  5. Emballage selon l'une quelconque des revendications précédentes, caractérisé en ce que la ligne de rupture prédéterminée (9) est formée par un gaufrage introduit dans le film de scellement (7), qui coupe le film de scellement (7), en particulier au moins aussi loin que la couche barrière, sans détruire la couche barrière.
  6. Emballage selon la revendication 5, caractérisé en ce que la ligne de rupture prédéterminée (9) est formée par une découpe effectuée dans la pile de film supérieur (6) et de film de scellement (7) faisant face à la barquette au moyen d'un faisceau laser.
  7. Emballage selon l'une quelconque des revendications précédentes, caractérisé en ce que la pile de couche de film de scellement (7) possède une couche de scellement (14), en particulier de polyéthylène, destinée à être scellée avec la bande de bordure (2), et une couche stabilisante (15), en particulier de polyester.
  8. Emballage selon l'une quelconque des revendications précédentes, caractérisé en ce que la barquette (1) est constituée d'un matériau composite, en particulier ayant une couche support de plastique ou d'aluminium, dans lequel la couche du matériau composite faisant face à l'intérieur de la barquette est une couche scellable (4).
  9. Emballage selon la revendication 8, caractérisé en ce que le film de scellement (7) est scellé sur la région de bordure (2) de la barquette (1) avec sa face inférieure située à l'opposé de la couche barrière.
  10. Emballage selon la revendication 9, caractérisé en ce que des dépressions de type cavité sont constituées dans la région de bordure (2) de la barquette, lesquelles forment des régions exclues du scellement.
  11. Emballage selon l'une quelconque des revendications précédentes, caractérisé en ce que le film supérieur forme une languette s'ouvrant par arrachage (23), dans lequel il n'y a pas d'adhésif entre le film de scellement et la languette s'ouvrant par arrachage (23).
  12. Emballage selon la revendication 11, caractérisé en ce que la bordure externe du film de scellement est scellée à la région de bordure de la barquette pour permettre à la languette s'ouvrant par arrachage formée par le film supérieur d'être soulevée.
  13. Emballage selon l'une quelconque des revendications précédentes, caractérisé en ce que le film supérieur et le film de scellement sont liés dans une portion de liaison de la région de bordure au moyen de l'adhésif permanent.
  14. Film multicouche préfabriqué destiné à une application sur une barquette préformée pour préparer un emballage selon l'une quelconque des revendications 1 à 13, dans lequel le film multicouche comprend un film supérieur et un film de scellement muni de lignes de rupture prédéterminées, dans lequel le film supérieur et le film de scellement sont liés au moyen d'un adhésif permanent dans des régions prédéterminées qui représentent ultérieurement les régions centrales, et que le film supérieur et le film de scellement sont liés dans d'autres régions, lesquelles représentent les régions de bordure, au moyen d'un adhésif sensible à la pression, caractérisé en ce que le film supérieur (6) forme une couche de support stable et est formé par un film de polypropylène orienté ou étiré, respectivement, ayant une épaisseur comprise entre 38 g/m2 et 42 g/m2.
EP11151841.1A 2010-01-22 2011-01-24 Emballage refermable Active EP2347972B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010005554A DE102010005554A1 (de) 2010-01-22 2010-01-22 Wiederverschließbare Verpackung

Publications (2)

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

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Family Applications (1)

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EP11151841.1A Active EP2347972B1 (fr) 2010-01-22 2011-01-24 Emballage refermable

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EP (1) EP2347972B1 (fr)
DE (2) DE102010005554A1 (fr)
ES (1) ES2899659T3 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10689172B2 (en) 2013-12-06 2020-06-23 Sonoco Development, Inc. Peel-away shaker can and can membrane
WO2016131742A1 (fr) 2015-02-20 2016-08-25 Amcor Flexibles Burgdorf Gmbh Emballage refermable
WO2016131741A1 (fr) 2015-02-20 2016-08-25 Amcor Flexibles Burgdorf Gmbh Emballage refermable
WO2016131740A1 (fr) 2015-02-20 2016-08-25 Amcor Flexibles Burgdorf Gmbh Emballage refermable
LU92885B1 (en) 2015-11-25 2017-06-20 Tarkett Gdl Sa Method for producing a resilient floor covering with a printed decorative layer
ES2681234T3 (es) 2016-01-14 2018-09-12 Amcor Flexibles Burgdorf Gmbh Envase recerrable y método para producir el mismo
US10597202B2 (en) 2017-10-16 2020-03-24 Sonoco Development, Inc. Resealable lidding with patterned adhesive
CN113795434A (zh) * 2019-05-09 2021-12-14 克吉卡斯公司 具有可拆卸区段的多层覆盖件及其生产方法

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Publication number Priority date Publication date Assignee Title
FR2551031B1 (fr) * 1983-08-24 1986-07-04 Alsacienne Aluminium Recipient a ouverture par pelage et procede de production des elements de fermeture de tels recipients
US4735335A (en) * 1985-08-06 1988-04-05 Etude Et Realisation De Chaines Automatiques-E.R.C.A. Composite band for lids for thermoplastic containers
JPS62208375A (ja) * 1986-03-06 1987-09-12 東洋アルミニウム株式会社 密封容器の蓋材
JP2575770B2 (ja) * 1988-01-18 1997-01-29 出光石油化学株式会社 易開封性密封容器
SE505294C2 (sv) * 1994-12-13 1997-07-28 Regath Hb Återförslutbar förpackning med organ för indikering om förpackningen är bruten
DE19523754A1 (de) * 1995-06-29 1997-01-16 Hueck Folien Gmbh & Co Kg Foliendeckel zum Verschließen von Behältern, Folienbahn zur Herstellung solcher Foliendeckel und Verfahren zur Herstellung einer solchen Folienbahn
SE9902642L (sv) 1999-07-08 2001-01-09 Fredin Sven Inge Material och sätt för att bilda ett lock på en förpackning
FR2801571B1 (fr) 1999-11-26 2002-02-15 Danisco Flexible France Feuille d'emballage refermable et emballage refermable la comportant
DE50307868D1 (de) * 2003-02-19 2007-09-20 Alcan Tech & Man Ltd Verpackungsbehälter mit einer Verpackungsfolie mit integriertem Offnungs-und Wiederverschliesssystem
US7717620B2 (en) 2004-06-11 2010-05-18 Sonoco Development, Inc. Flexible packaging structure with a built-in opening and reclose feature, and method for making same
US7681732B2 (en) * 2008-01-11 2010-03-23 Cryovac, Inc. Laminated lidstock

Also Published As

Publication number Publication date
EP2347972A1 (fr) 2011-07-27
ES2899659T3 (es) 2022-03-14
DE102010005554A1 (de) 2011-07-28
DE202011109904U1 (de) 2012-07-02

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