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EP2662309B1 - Cover film for container - Google Patents

Cover film for container Download PDF

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Publication number
EP2662309B1
EP2662309B1 EP20120167549 EP12167549A EP2662309B1 EP 2662309 B1 EP2662309 B1 EP 2662309B1 EP 20120167549 EP20120167549 EP 20120167549 EP 12167549 A EP12167549 A EP 12167549A EP 2662309 B1 EP2662309 B1 EP 2662309B1
Authority
EP
European Patent Office
Prior art keywords
lid film
open
tear
film
weakening line
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.)
Not-in-force
Application number
EP20120167549
Other languages
German (de)
French (fr)
Other versions
EP2662309A1 (en
Inventor
Matthias Perick
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.)
Nitto Advanced Film Gronau GmbH
Original Assignee
Mondi Consumer Packaging Technologies GmbH
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 Mondi Consumer Packaging Technologies GmbH filed Critical Mondi Consumer Packaging Technologies GmbH
Priority to EP20120167549 priority Critical patent/EP2662309B1/en
Publication of EP2662309A1 publication Critical patent/EP2662309A1/en
Application granted granted Critical
Publication of EP2662309B1 publication Critical patent/EP2662309B1/en
Not-in-force 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
    • B65D77/2028—Means for opening the cover other than, or in addition to, a pull tab
    • B65D77/2032—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
    • B65D77/2044—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure
    • B65D77/2048—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut
    • B65D77/2056—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut the cover being weakened
    • 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
    • B65D2577/2066—Means on, or attached to, container flange facilitating opening, e.g. non-bonding region, cut-out
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10—Container closures formed after filling
    • B65D2577/20—Container closures formed after filling by applying separate lids or covers
    • B65D2577/2075—Lines of weakness or apertures
    • B65D2577/2091—Lines of weakness or apertures in cover

Definitions

  • the invention relates to a lidding film for containers, wherein the lidding film is provided with a weakening line for tearing.
  • the lidding film can be attached to trays, cups or the like as the sole packaging closure.
  • the lidding film is intended for glass containers and plastic containers, which are closed with a lid, in particular a screw cap, and are used for packaging foodstuffs.
  • the foods may be, for example, dry powder, instant coffee and the like.
  • the cover film applied to the edge of the glass or plastic container forms a tamper-evident closure and protects the packaged food from moisture, loss of flavor and the like until it is first removed.
  • a lid film for containers which has a multilayer structure with a cover layer, for example of polyester or oriented polypropylene and a sealable carrier layer z. B. from a polyolefin.
  • the lidding film can at least one Intermediate layer with barrier properties, in particular an intermediate layer of a metal foil included.
  • the cover layer of the lidding film is provided with a weakening line for tearing open the lidding film, wherein a portion of the weakening line is formed as a tongue.
  • the cover sheet can be pressed, the tongue may have a tip to improve the crack initiation.
  • the lid comprises a removable region delimited by a line of weakness with a liftable strip. At the free end of the strip a projecting short incision is arranged.
  • the invention has for its object to provide a lidding film for container, which is pressed when opening the container and allows user-friendly handling.
  • the object of the invention and solution of this problem is a cover film according to claim 1.
  • the cover foil is provided with a weakening line for tearing open the cover foil.
  • a weakening line for tearing open the cover foil.
  • an indentation region is provided, which has at least the size of a fingertip and is bounded on at least one side of its surface by a tear line.
  • the tear line delimiting tear line protrudes from the weakening line into a region of the lid foil, which extends along the Weakening line detachable portion of the lidding film is adjacent.
  • the section adjoining the indentation region and separable from the cover film preferably has the shape of a tongue.
  • the lidding film When used as intended, the lidding film is mounted on the edge of a container, wherein the attachment can be made by an adhesive bond or a sealed connection.
  • the compound can also be embodied as a peelable compound in such a way that the cover film can be completely pulled off the edge of the container.
  • the indentation area bounded laterally by a tear line is pressed in by applying pressure.
  • the indentation region of the lidding film along the tear line and the adjacent weakening line separates from the remaining lidding film and releases a boundary of a section which can be separated from the lidding film.
  • the exposed boundary can then be grasped well between two fingers to rupture the lidding film along the line of weakness.
  • the exposed boundary has the shape of a tongue.
  • the cover foil can be torn open spirally or torn open as a sheet along an annular line of weakness near the edge of the container.
  • the cover film can also be completely removed from the container edge in the course of the tearing process.
  • a first preferred embodiment of the invention provides that the indentation region is bounded by the tear line and an edge zone of the cover film on a container.
  • a further advantageous embodiment of the invention provides that the indentation is limited by two tear lines, starting from the boundary in a projecting on the tongue adjacent area of the lidding film.
  • the tear lines are aligned radially.
  • the impressing region laterally delimited by two tear lines can be arranged in a middle region of the cover film or in a region close to the wall near the container wall of a container closed by the cover film.
  • the indentation region is arranged close to the container wall and the tear-open areas bounding tear lines extend to the edge of the lidding film or an edge zone of the lidding film which can be fastened to the container.
  • the weakening line can have different courses.
  • An advantageous embodiment of the invention provides that the weakening line for tearing open the cover film has two ends, wherein a first end extends to the edge of the cover film and wherein the second end of the weakening line extends in a tear strip limiting distance to the edge of the cover film.
  • the lid film is suitably attached in this embodiment by means of a peelable compound on the edge of a container and can be torn spirally along the tear strip and removed without residue from the edge of the container.
  • the second end of the line of weakness has a spiraling portion bounding the crack propagation, the spiraling portion being bent back to the line of weakness. By this configuration, the crack propagation ends at a defined and defined by the spiral formation point. The still adhering part of the lidding film can then be removed in one go from the edge of the container
  • a further advantageous embodiment of the invention provides that the weakening line forms a closed ring.
  • the line of weakness runs near the container edge.
  • the embodiment described is particularly suitable when the lid film is secured by an adhesive bond or a non-peelable sealing compound on the edge of a container.
  • the container may have any geometry in plan view.
  • the lidding film may consist of a laminate which has two or more layers.
  • the cover film preferably has a carrier layer of a sealable polymer, in particular a polyethylene, and at least one further layer as a cover layer.
  • the cover layer may in particular consist of a polyester, an oriented polypropylene or oriented polyamide.
  • the carrier layer can in particular also be designed as a sealable peel layer.
  • the cover film formed as a multilayer composite film expediently also has at least one intermediate layer with barrier properties.
  • the intermediate layer can consist of a metal foil or a metallized polymer layer.
  • the cover sheet consists of a multi-layer laminated composite and has a tendency to curl caused by tensions in the layers of the laminating composite.
  • the curl of the lid film supports the handling when opening the package or tearing the lid foil. It causes the tongue to set up after the depression of the indentation area, which further facilitates gripping.
  • the line of weakness for tearing open the cover film and the tear line for limiting the indentation region pass through the cover layer and preferably leave the carrier layer intact.
  • the weakening line and the tear lines can consist of laser cuts, punched lines or perforations introduced into the cover layer.
  • the Fig. 1 shows a closed container 2 with a lid film 1 container for packaging food.
  • the cover film 1 consists of a multilayer laminate, which in the exemplary embodiment has a carrier layer and a cover layer.
  • the cover layer is provided with a weakening line 3 for tearing open the cover film 1, wherein a section 4 of the weakening line has the shape of a tongue.
  • FIG. 2a and 2 B the opening of the container is shown by tearing open the cover sheet 1.
  • an indentation region 5 is provided which has at least the size of a fingertip and is bounded on at least one side of its surface by a tear line 6 introduced into the cover layer.
  • the tearing line 6 delimiting the indentation region 5 protrudes from the weakening line into a region of the cover film 1 which is adjacent to the tongue-shaped section 4 of the cover film which can be removed along the weakening line.
  • the indentation region 5 is pressed down by means of a finger, wherein the indentation region 5 of the Lid film 1 is separated along the tear line 6 and at the boundary of the tongue 4 from the remaining surface of the lid film.
  • the boundary of the tongue 4 is at least partially exposed, so that the tongue 4 can be detected with two fingers.
  • the cover sheet 1 can be torn open along the weakening line 3.
  • the indentation region 5 is delimited by the tear line 6 and an edge zone 7 of the cover film 1 which can be fastened to the container 2.
  • the weakening line 3 has two ends for tearing open the cover foil, a first end extending to the edge 8 of the cover foil 1, and the second end of the weakening line extending in a tear-strip 9 delimiting distance from the edge 8 of the cover foil 1.
  • the lidding film 1 is attached by means of a peelable compound on the edge of the container 2 and can be completely detached from the container 2 and residue.
  • the boundary of the tongue 4 can be taken with two fingers and the lid sheet 1 spirally torn open by separating the tear strip 9 and are completely removed from the edge of the container 2. So that the cover sheet 1 can be released in one piece from the container edge, the weakening line 3 runs in a spiral-shaped portion 10 delimiting the crack propagation.
  • the representation in Fig. 3 If one deduces that the spiral-shaped portion 10 is bent back to the line of weakness 3. Thus, the crack propagation ends at a position defined by the spiral portion 10.
  • the cover film 1 can be detached without residue from the edge of the container 2 by means of a further pulling movement.
  • Fig. 4 is the indentation 5 of two tear lines 6, 6 'limited, starting from the boundary of the section 4 in projecting an adjacent region of the cover sheet 1.
  • the tear lines 6, 6 ' are aligned radially and extend in the embodiment of the Fig. 4 up to the edge 8 of the cover film 1 or at least up to an attachable to the container edge edge zone 7 of the lid film.
  • the indentation region 5 is arranged in the vicinity of the container wall as in the previously described example.
  • the lidding film 1 is fixed by a firm, non-peelable compound on the edge of the container 2.
  • the opening of the container 2 is carried out by tearing the cover sheet 1 along a line of weakness 3, which forms a closed ring and adjacent to the edge of the container 2 with the smallest possible distance.
  • the lidding film 1 is depressed in Eindschreibbericht 5, wherein the indentation 5 between the two tear lines 6, 6 'along the line of weakness 3 separates from the cover sheet 1 and the boundary of the detachable from the lid film section 4 is exposed.
  • the cover sheet 1 can be torn open along the ring-shaped weakening line 3.
  • the section 4 preferably has the shape of a tongue.
  • the indentation region 5 is arranged at a greater distance from the container wall in a middle region of the cover film 1.
  • the indentation region 5 is limited in this embodiment by two tear lines 6, 6 ', which project from the edge of a tongue 4, starting in a region adjacent to the portion 4 of the lid sheet 1.
  • the free ends of the tear lines 6, 6' are curved outwards.
  • the cover sheet 1 is preferably made of a multilayer laminate which has a cover layer of polyester, oriented polypropylene or oriented Polyamide and a carrier layer of a sealable polymer, in particular a polyethylene having.
  • the lidding film 1 may contain one or more intermediate layers as barrier layers.
  • the cover film 1 has an intermediate layer of a metal foil or a metallized polymer.
  • a multi-layer laminating composite is particularly suitable which has a tendency to curl generated by tension in the layers of Kaschierverbundes. The tendency to curl causes the tongue 4 or a strip 9 to be torn open, when the lidding film 1 is pressed in the indentation region 5 to open the packaging. A curl of the lidding film 1 favors the handling when tearing the lidding film and opening the packaging.
  • the line of weakness 3 for rupturing the cover film 1 and the tear lines 6, 6 'for limiting the indentation region 5 preferably only pass through the cover layer of the cover film 1, while at least the carrier layer to be fastened to the edge of the container remains intact.

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

Description

Die Erfindung betrifft eine Deckelfolie für Behälter, wobei die Deckelfolie mit einer Schwächungslinie zum Aufreißen versehen ist.The invention relates to a lidding film for containers, wherein the lidding film is provided with a weakening line for tearing.

Die Deckelfolie kann als alleiniger Verpackungsabschluss auf Trays, Bechern oder dergleichen befestigt werden. Insbesondere ist die Deckelfolie aber für Glasbehälter und Kunststoffbehälter bestimmt, die mit einem Deckel, insbesondere einer Schraubkappe verschlossen sind und zur Verpackung von Lebensmitteln verwendet werden. Bei den Lebensmitteln kann es sich beispielsweise um Trockenpulver, Instantkaffee und dergleichen handeln. Die auf dem Rand des Glas- oder Kunststoffbehälters aufgebrachte Deckelfolie bildet einen Originalitätsverschluss und schützt das verpackte Lebensmittel bis zur erstmaligen Entnahme vor Feuchtigkeit, Aromaverlust und dergleichen. Insbesondere dann, wenn auf die mit der Deckelfolie verschlossene Verpackung eine Kappe aufgeschraubt wird, die nach erstmaligem Öffnen der Verpackung einen Wiederverschluss ermöglicht, darf die Deckelfolie keine am Umfang der Verpackung vorstehende Lasche aufweisen, da der Schraubverschluss die Lasche und damit auch die Deckelfolie beschädigen würde. In der Praxis werden als Deckelfolie für Verpackungen, die eine Schraubkappe zum Wiederverschließen aufweisen, häufig Papierverbundmaterialien verwendet. Das Entfernen der Deckelfolie ist umständlich und wenig anwenderfreundlich. Zum Öffnen benötigt man in der Regel Hilfsmittel wie z. B. Messer. Ferner bleiben häufig Fetzen beim Aufschneiden der Deckelfolie übrig.The lidding film can be attached to trays, cups or the like as the sole packaging closure. In particular, the lidding film is intended for glass containers and plastic containers, which are closed with a lid, in particular a screw cap, and are used for packaging foodstuffs. The foods may be, for example, dry powder, instant coffee and the like. The cover film applied to the edge of the glass or plastic container forms a tamper-evident closure and protects the packaged food from moisture, loss of flavor and the like until it is first removed. In particular, when a cap is screwed onto the sealed with the lid film packaging, which allows a re-closure after the first opening of the packaging, the lid film must not have on the circumference of the packaging tab, since the screw would damage the tab and thus the lid film , In practice, as a lidding film for packages having a screw cap for reclosing, paper composite materials are often used. The removal of the cover film is cumbersome and not very user-friendly. To open you usually need aids such. As knives. Furthermore, scraps often remain when cutting the lid film.

Aus EP 1 544 127 B1 ist eine Deckelfolie für Behälter bekannt, die einen mehrschichtigen Aufbau mit einer Deckschicht, beispielsweise aus Polyester oder orientiertem Polypropylen sowie eine siegelfähige Trägerschicht z. B. aus einem Polyolefin aufweist. Zusätzlich kann die Deckelfolie zumindest eine Zwischenschicht mit Barriereeigenschaften, insbesondere auch eine Zwischenschicht aus einer Metallfolie, enthalten. Die Deckschicht der Deckelfolie ist mit einer Schwächungslinie zum Aufreißen der Deckelfolie versehen, wobei ein Abschnitt der Schwächungslinie als Zunge ausgebildet ist. Hier kann die Deckelfolie eingedrückt werden, wobei die Zunge zur Verbesserung der Risseinleitung eine Spitze aufweisen kann. Da die Zunge zum Öffnen der Verpackung mehr oder weniger stark nach innen eingedrückt wird, ist es schwierig, den eingedrückten Bereich zu erfassen und den von der Schwächungslinie begrenzten Bereich der Deckelfolie anschließend aufzureißen. Die Handhabung der Deckelfolie ist daher noch verbesserungsbedürftig.Out EP 1 544 127 B1 a lid film for containers is known, which has a multilayer structure with a cover layer, for example of polyester or oriented polypropylene and a sealable carrier layer z. B. from a polyolefin. In addition, the lidding film can at least one Intermediate layer with barrier properties, in particular an intermediate layer of a metal foil included. The cover layer of the lidding film is provided with a weakening line for tearing open the lidding film, wherein a portion of the weakening line is formed as a tongue. Here, the cover sheet can be pressed, the tongue may have a tip to improve the crack initiation. Since the tongue is pressed inward more or less in order to open the package, it is difficult to grasp the pressed-in area and then to tear open the area of the lidding film delimited by the line of weakness. The handling of the lidding film is therefore still in need of improvement.

Aus der US 3,244,356 A ist ein Verpackungsdeckel mit einer Aufreißhilfe bekannt. Der Deckel umfasst einen durch eine Schwächungslinie abgegrenzten entfernbaren Bereich mit einem anhebbaren Streifen. Am freien Ende des Streifens ist ein davon abstehender kurzer Einschnitt angeordnet.From the US 3,244,356 A is a packaging lid with a tear open known. The lid comprises a removable region delimited by a line of weakness with a liftable strip. At the free end of the strip a projecting short incision is arranged.

Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, eine Deckelfolie für Behälter anzugeben, die beim Öffnen des Behälters eingedrückt wird und eine benutzerfreundliche Handhabung ermöglicht.Against this background, the invention has for its object to provide a lidding film for container, which is pressed when opening the container and allows user-friendly handling.

Gegenstand der Erfindung und Lösung dieser Aufgabe ist eine Deckelfolie nach Anspruch 1.The object of the invention and solution of this problem is a cover film according to claim 1.

Die Deckelfolie ist mit einer Schwächungslinie zum Aufreißen der Deckelfolie versehen. Neben einem Abschnitt der Schwächungslinie ist ein Eindrückbereich vorgesehen, der zumindest die Größe einer Fingerkuppe aufweist und an mindestens einer Seite seiner Fläche von einer Aufreißlinie begrenzt ist. Die den Eindrückbereich begrenzende Aufreißlinie steht von der Schwächungslinie ausgehend in einen Bereich der Deckelfolie vor, der zu den entlang der Schwächungslinie ablösbaren Abschnitt der Deckelfolie benachbart ist. Der an den Eindrückbereich angrenzende und von der Deckelfolie abtrennbare Abschnitt weist vorzugsweise die Form einer Zunge auf.The cover foil is provided with a weakening line for tearing open the cover foil. In addition to a section of the weakening line, an indentation region is provided, which has at least the size of a fingertip and is bounded on at least one side of its surface by a tear line. The tear line delimiting tear line protrudes from the weakening line into a region of the lid foil, which extends along the Weakening line detachable portion of the lidding film is adjacent. The section adjoining the indentation region and separable from the cover film preferably has the shape of a tongue.

Bei einem bestimmungsgemäßen Gebrauch ist die Deckelfolie auf dem Rand eines Behälters befestigt, wobei die Befestigung durch eine Klebeverbindung oder eine Siegelverbindung erfolgen kann. Die Verbindung kann als peelfähige Verbindung auch so ausgeführt sein, dass die Deckelfolie vollständig vom Rand des Behälters abgezogen werden kann. Zum Öffnen der auf einen Behälter aufgebrachten Deckelfolie wird der seitlich von einer Aufreißlinie begrenzte Eindrückbereich durch Ausüben von Druck eingedrückt. Dabei löst sich der Eindrückbereich der Deckelfolie entlang der Aufreißlinie sowie der angrenzenden Schwächungslinie von der übrigen Deckelfolie und gibt eine Berandung eines von der Deckelfolie abtrennbaren Abschnitts frei. Die freigelegte Berandung kann anschließend gut zwischen zwei Fingern gefasst werden, um die Deckelfolie entlang der Schwächungslinie aufzureißen. Vorzugsweise weist die freigelegte Berandung die Form einer Zunge auf. Je nach dem Verlauf der Schwächungslinie kann die Deckelfolie spiralförmig aufgerissen oder als Blatt entlang einer ringförmig ausgebildeten Schwächungslinie nahe des Behälterrandes aufgerissen werden. Bei einer peelfähigen Verbindung zwischen der Deckelfolie und dem Behälterrand kann die Deckelfolie im Zuge des Aufreißvorganges auch vollständig von dem Behälterrand entfernt werden.When used as intended, the lidding film is mounted on the edge of a container, wherein the attachment can be made by an adhesive bond or a sealed connection. The compound can also be embodied as a peelable compound in such a way that the cover film can be completely pulled off the edge of the container. To open the lid sheet applied to a container, the indentation area bounded laterally by a tear line is pressed in by applying pressure. In this case, the indentation region of the lidding film along the tear line and the adjacent weakening line separates from the remaining lidding film and releases a boundary of a section which can be separated from the lidding film. The exposed boundary can then be grasped well between two fingers to rupture the lidding film along the line of weakness. Preferably, the exposed boundary has the shape of a tongue. Depending on the course of the weakening line, the cover foil can be torn open spirally or torn open as a sheet along an annular line of weakness near the edge of the container. In the case of a peelable connection between the cover film and the container edge, the cover film can also be completely removed from the container edge in the course of the tearing process.

Für die Anordnung und Gestaltung des Eindrückbereiches ergeben sich mehrere Möglichkeiten. Eine erste bevorzugte Ausführung der Erfindung sieht vor, dass der Eindrückbereich von der Aufreißlinie und einer Randzone der Deckelfolie auf einem Behälter befestigt wird, begrenzt ist. Eine weitere vorteilhafte Ausführungsvariante der Erfindung sieht vor, dass der Eindrückbereich von zwei Aufreißlinien begrenzt ist, die von der Berandung ausgehend in einen an die Zunge angrenzenden Bereich der Deckelfolie vorstehen. Zweckmäßig sind die Aufreißlinien strahlenförmig ausgerichtet. Der von zwei Aufreißlinien seitlich begrenzte Eindrückbereich kann in einem mittleren Bereich der Deckelfolie oder in einem wandnahen Bereich nahe der Behälterwand eines von der Deckelfolie verschlossenen Behälters angeordnet sein. Gemäß einer bevorzugten Ausführung der Erfindung ist der Eindrückbereich nahe der Behälterwand angeordnet und erstrecken sich die den Eindrückbereich begrenzenden Aufreißlinien bis zu dem Rand der Deckelfolie oder einer auf dem Behälter befestigbaren Randzone der Deckelfolie.For the arrangement and design of Eindrückbereiches there are several possibilities. A first preferred embodiment of the invention provides that the indentation region is bounded by the tear line and an edge zone of the cover film on a container. A further advantageous embodiment of the invention provides that the indentation is limited by two tear lines, starting from the boundary in a projecting on the tongue adjacent area of the lidding film. Suitably, the tear lines are aligned radially. The impressing region laterally delimited by two tear lines can be arranged in a middle region of the cover film or in a region close to the wall near the container wall of a container closed by the cover film. According to a preferred embodiment of the invention, the indentation region is arranged close to the container wall and the tear-open areas bounding tear lines extend to the edge of the lidding film or an edge zone of the lidding film which can be fastened to the container.

Die Schwächungslinie kann unterschiedliche Verläufe aufweisen. Eine vorteilhafte Ausführung der Erfindung sieht vor, dass die Schwächungslinie zum Aufreißen der Deckelfolie zwei Enden aufweist, wobei ein erstes Ende sich bis zum Rand der Deckelfolie erstreckt und wobei das zweite Ende der Schwächungslinie in einem einen Aufreißstreifen begrenzenden Abstand zum Rand der Deckelfolie verläuft. Die Deckelfolie ist bei dieser Ausführung zweckmäßig mittels einer peelfähigen Verbindung auf dem Rand eines Behälters befestigt und kann entlang des Aufreißstreifens spiralförmig aufgerissen und rückstandsfrei vom Rand des Behälters abgezogen werden. Damit die Deckelfolie in einem Stück komplett von dem Behälter entfernt werden kann, weist das zweite Ende der Schwächungslinie einen die Rissausbreitung begrenzenden spiralförmigen Abschnitt auf, wobei der spiralförmige Abschnitt auf die Schwächungslinie zurückgebogen ist. Durch diese Ausgestaltung endet die Rissausbreitung an einer definierten und durch die spiralförmige Ausbildung festgelegten Stelle. Der noch anhaftende Teil der Deckelfolie kann anschließend in einem Zug von dem Rand des Behälters abgezogen werdenThe weakening line can have different courses. An advantageous embodiment of the invention provides that the weakening line for tearing open the cover film has two ends, wherein a first end extends to the edge of the cover film and wherein the second end of the weakening line extends in a tear strip limiting distance to the edge of the cover film. The lid film is suitably attached in this embodiment by means of a peelable compound on the edge of a container and can be torn spirally along the tear strip and removed without residue from the edge of the container. In order for the lidding film to be completely removed from the container in one piece, the second end of the line of weakness has a spiraling portion bounding the crack propagation, the spiraling portion being bent back to the line of weakness. By this configuration, the crack propagation ends at a defined and defined by the spiral formation point. The still adhering part of the lidding film can then be removed in one go from the edge of the container

Eine weitere vorteilhafte Ausführung der Erfindung sieht vor, dass die Schwächungslinie einen geschlossenen Ring bildet. Die Schwächungslinie verläuft dabei nahe des Behälterrandes. Die beschriebene Ausgestaltung kommt insbesondere dann in Betracht, wenn die Deckelfolie durch eine Klebeverbindung oder eine nicht peelfähige Siegelverbindung auf dem Rand eines Behälters befestigt ist. Der Behälter kann in der Draufsicht eine beliebige Geometrie aufweisen.A further advantageous embodiment of the invention provides that the weakening line forms a closed ring. The line of weakness runs near the container edge. The embodiment described is particularly suitable when the lid film is secured by an adhesive bond or a non-peelable sealing compound on the edge of a container. The container may have any geometry in plan view.

Die Deckelfolie kann aus einem Laminat bestehen, welches zwei oder mehrere Schichten aufweist. Die Deckelfolie weist vorzugsweise eine Trägerschicht aus einem siegelfähigen Polymer, insbesondere einem Polyethylen, und mindestens eine weitere Schicht als Deckschicht auf. Die Deckschicht kann insbesondere aus einem Polyester, einem orientierten Polypropylen oder orientiertem Polyamid bestehen. Die Trägerschicht kann insbesondere auch als siegelfähige Peelschicht ausgebildet sein. Die als mehrschichtige Verbundfolie ausgebildete Deckelfolie weist zweckmäßig ferner mindestens eine Zwischenschicht mit Barriereeigenschaften auf. Insbesondere kann die Zwischenschicht aus einer Metallfolie oder einer metallisierten Polymerschicht bestehen.The lidding film may consist of a laminate which has two or more layers. The cover film preferably has a carrier layer of a sealable polymer, in particular a polyethylene, and at least one further layer as a cover layer. The cover layer may in particular consist of a polyester, an oriented polypropylene or oriented polyamide. The carrier layer can in particular also be designed as a sealable peel layer. The cover film formed as a multilayer composite film expediently also has at least one intermediate layer with barrier properties. In particular, the intermediate layer can consist of a metal foil or a metallized polymer layer.

Die Erfindung lehrt, dass die Deckelfolie aus einem mehrlagigen Kaschierverbund besteht und eine durch Spannungen in den Lagen des Kaschierverbundes erzeugte Rollneigung aufweist. Die Rollneigung der Deckelfolie unterstützt die Handhabung beim Öffnen der Verpackung bzw. Aufreißen der Deckelfolie. Sie bewirkt, dass sich die Zunge nach dem Niederdrücken des Eindrückbereiches aufstellt, was das Greifen weiter erleichtert.The invention teaches that the cover sheet consists of a multi-layer laminated composite and has a tendency to curl caused by tensions in the layers of the laminating composite. The curl of the lid film supports the handling when opening the package or tearing the lid foil. It causes the tongue to set up after the depression of the indentation area, which further facilitates gripping.

Die Schwächungslinie zum Aufreißen der Deckelfolie und die Aufreißlinie zur Begrenzung des Eindrückbereiches durchsetzen die Deckschicht und lassen die Trägerschicht vorzugsweise unversehrt. Die Schwächungslinie und die Aufreißlinien können aus Laserschnitten, Stanzlinien oder in die Deckschicht eingebrachten Perforationen bestehen.The line of weakness for tearing open the cover film and the tear line for limiting the indentation region pass through the cover layer and preferably leave the carrier layer intact. The weakening line and the tear lines can consist of laser cuts, punched lines or perforations introduced into the cover layer.

Im Folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung erläutert. Es zeigen schematisch:

Fig. 1
einen mit einer Deckelfolie verschlossenen Behälter,
Fig. 2a und 2b
das Aufreißen der Deckelfolie zum Öffnen des Behälters in verschiedenen Funktionsstellungen,
Fig. 3 bis 5
auf Behältern befestigte Deckelfolien in verschiedenen Ausführungsvarianten, jeweils in der Draufsicht.
In the following the invention will be explained with reference to a drawing showing only one embodiment. They show schematically:
Fig. 1
a container closed with a cover film,
Fig. 2a and 2b
the tearing open of the lidding foil to open the container in different functional positions,
Fig. 3 to 5
Lids attached to containers lid films in various embodiments, each in plan view.

Die Fig. 1 zeigt einen mit einer Deckelfolie 1 verschlossenen Behälter 2 zur Verpackung von Lebensmitteln. Die Deckelfolie 1 besteht aus einem mehrschichtigen Laminat, das im Ausführungsbeispiel eine Trägerschicht und eine Deckschicht aufweist. Die Deckschicht ist mit einer Schwächungslinie 3 zum Aufreißen der Deckelfolie 1 versehen, wobei ein Abschnitt 4 der Schwächungslinie die Form einer Zunge aufweist.The Fig. 1 shows a closed container 2 with a lid film 1 container for packaging food. The cover film 1 consists of a multilayer laminate, which in the exemplary embodiment has a carrier layer and a cover layer. The cover layer is provided with a weakening line 3 for tearing open the cover film 1, wherein a section 4 of the weakening line has the shape of a tongue.

In den Fig. 2a und 2b ist das Öffnen des Behälters durch Aufreißen der Deckelfolie 1 dargestellt. Bei einer vergleichenden Betrachtung der Fig. 2a und 2b wird deutlich, dass neben der Zunge 4 ein Eindrückbereich 5 vorgesehen ist, der zumindest die Größe einer Fingerkuppe aufweist und an mindestens einer Seite seiner Fläche von einer in die Deckschicht eingebrachten Aufreißlinie 6 begrenzt ist. Die den Eindrückbereich 5 begrenzende Aufreißlinie 6 steht von der Schwächungslinie ausgehend in einen Bereich der Deckelfolie 1 vor, der zu dem entlang der Schwächungslinie ablösbaren zungenförmigen Abschnitt 4 der Deckelfolie benachbart ist. Zum Öffnen der Verpackung wird der Eindrückbereich 5 mittels eines Fingers niedergedrückt, wobei der Eindrückbereich 5 der Deckelfolie 1 sich entlang der Aufreißlinie 6 und an der Berandung der Zunge 4 von der übrigen Fläche der Deckelfolie trennt. Durch das Niederdrücken des Eindrückbereiches 5 wird die Berandung der Zunge 4 zumindest teilweise freigelegt, so dass die Zunge 4 mit zwei Fingern erfasst werden kann. Nach dem Erfassen der Zunge 4 kann die Deckelfolie 1 entlang der Schwächungslinie 3 aufgerissen werden.In the Fig. 2a and 2 B the opening of the container is shown by tearing open the cover sheet 1. In a comparative analysis of Fig. 2a and 2 B It is clear that in addition to the tongue 4 an indentation region 5 is provided which has at least the size of a fingertip and is bounded on at least one side of its surface by a tear line 6 introduced into the cover layer. The tearing line 6 delimiting the indentation region 5 protrudes from the weakening line into a region of the cover film 1 which is adjacent to the tongue-shaped section 4 of the cover film which can be removed along the weakening line. To open the packaging, the indentation region 5 is pressed down by means of a finger, wherein the indentation region 5 of the Lid film 1 is separated along the tear line 6 and at the boundary of the tongue 4 from the remaining surface of the lid film. By depressing the indentation region 5, the boundary of the tongue 4 is at least partially exposed, so that the tongue 4 can be detected with two fingers. After detecting the tongue 4, the cover sheet 1 can be torn open along the weakening line 3.

Im Ausführungsbeispiel der Fig. 3 ist der Eindrückbereich 5 von der Aufreißlinie 6 und einer auf dem Behälter 2 befestigbaren Randzone 7 der Deckelfolie 1 begrenzt. Ferner entnimmt man der Darstellung in Fig. 3, dass die Schwächungslinie 3 zum Aufreißen der Deckelfolie zwei Enden aufweist, wobei ein erstes Ende sich bis zum Rand 8 der Deckelfolie 1 erstreckt und wobei das zweite Ende der Schwächungslinie in einem einen Aufreißstreifen 9 begrenzenden Abstand zum Rand 8 der Deckelfolie 1 verläuft. Die Deckelfolie 1 ist mittels einer peelfähigen Verbindung auf dem Rand des Behälters 2 befestigt und kann vollständig und rückstandfrei von dem Behälter 2 gelöst werden. Nach dem Eindrücken der Deckelfolie 1 kann die Berandung der Zunge 4 mit zwei Fingern gefasst werden und die Deckelfolie 1 spiralförmig durch Abtrennen des Aufreißstreifens 9 aufgerissen sowie restlos vom Rand des Behälters 2 abgezogen werden. Damit die Deckelfolie 1 in einem Stück von dem Behälterrand gelöst werden kann, läuft die Schwächungslinie 3 in einem die Rissausbreitung begrenzenden spiralförmigen Abschnitt 10 aus. Der Darstellung in Fig. 3 entnimmt man, dass der spiralförmige Abschnitt 10 auf die Schwächungslinie 3 zurückgebogen ist. Damit endet der Rissfortschritt an einer durch den spiralförmigen Abschnitt 10 definierten Stelle. Die Deckelfolie 1 kann mittels einer weiteren Zugbewegung rückstandsfrei von dem Rand des Behälters 2 gelöst werden.In the embodiment of Fig. 3 the indentation region 5 is delimited by the tear line 6 and an edge zone 7 of the cover film 1 which can be fastened to the container 2. Further one takes the representation in Fig. 3 in that the weakening line 3 has two ends for tearing open the cover foil, a first end extending to the edge 8 of the cover foil 1, and the second end of the weakening line extending in a tear-strip 9 delimiting distance from the edge 8 of the cover foil 1. The lidding film 1 is attached by means of a peelable compound on the edge of the container 2 and can be completely detached from the container 2 and residue. After pressing the cover sheet 1, the boundary of the tongue 4 can be taken with two fingers and the lid sheet 1 spirally torn open by separating the tear strip 9 and are completely removed from the edge of the container 2. So that the cover sheet 1 can be released in one piece from the container edge, the weakening line 3 runs in a spiral-shaped portion 10 delimiting the crack propagation. The representation in Fig. 3 If one deduces that the spiral-shaped portion 10 is bent back to the line of weakness 3. Thus, the crack propagation ends at a position defined by the spiral portion 10. The cover film 1 can be detached without residue from the edge of the container 2 by means of a further pulling movement.

Im Ausführungsbeispiel der Fig. 4 ist der Eindrückbereich 5 von zwei Aufreißlinien 6, 6' begrenzt, die von der Berandung des Abschnitts 4 ausgehend in einen benachbarten Bereich der Deckelfolie 1 vorstehen. Die Aufreißlinien 6, 6' sind strahlenförmig ausgerichtet und erstrecken sich im Ausführungsbeispiel der Fig. 4 bis zum Rand 8 der Deckelfolie 1 oder zumindest bis zu einer auf dem Behälterrand befestigbaren Randzone 7 der Deckelfolie. Der Eindrückbereich 5 ist ebenso wie im zuvor beschriebenen Beispiel in der Nähe der Behälterwand angeordnet. Im Ausführungsbeispiel der Fig. 4 ist die Deckelfolie 1 durch eine feste, nicht peelfähige Verbindung auf dem Rand des Behälters 2 befestigt. Die Öffnung des Behälters 2 erfolgt durch Aufreißen der Deckelfolie 1 entlang einer Schwächungslinie 3, die einen geschlossenen Ring bildet und mit einem möglichst geringen Abstand an den Rand des Behälters 2 angrenzt. Zum Öffnen der Verpackung wird die Deckelfolie 1 im Eindrückbereich 5 niedergedrückt, wobei sich der Eindrückbereich 5 zwischen den beiden Aufreißlinien 6, 6' entlang der Schwächungslinie 3 von der Deckelfolie 1 trennt und die Berandung des von der Deckelfolie abtrennbaren Abschnitts 4 freigelegt wird. Nach dem Erfassen des Abschnitts 4 kann die Deckelfolie 1 entlang der ringförmig ausgebildeten Schwächungslinie 3 aufgerissen werden. Der Abschnitt 4 weist vorzugsweise die Form einer Zunge auf.In the embodiment of Fig. 4 is the indentation 5 of two tear lines 6, 6 'limited, starting from the boundary of the section 4 in projecting an adjacent region of the cover sheet 1. The tear lines 6, 6 'are aligned radially and extend in the embodiment of the Fig. 4 up to the edge 8 of the cover film 1 or at least up to an attachable to the container edge edge zone 7 of the lid film. The indentation region 5 is arranged in the vicinity of the container wall as in the previously described example. In the embodiment of Fig. 4 the lidding film 1 is fixed by a firm, non-peelable compound on the edge of the container 2. The opening of the container 2 is carried out by tearing the cover sheet 1 along a line of weakness 3, which forms a closed ring and adjacent to the edge of the container 2 with the smallest possible distance. To open the packaging, the lidding film 1 is depressed in Eindrückbereich 5, wherein the indentation 5 between the two tear lines 6, 6 'along the line of weakness 3 separates from the cover sheet 1 and the boundary of the detachable from the lid film section 4 is exposed. After detecting the section 4, the cover sheet 1 can be torn open along the ring-shaped weakening line 3. The section 4 preferably has the shape of a tongue.

Im Ausführungsbeispiel der Fig. 5 ist der Eindrückbereich 5 in einem größeren Abstand zur Behälterwand in einem mittleren Bereich der Deckelfolie 1 angeordnet. Der Eindrückbereich 5 ist auch bei diesem Ausführungsbeispiel von zwei Aufreißlinien 6, 6' begrenzt, die von der Berandung einer Zunge 4 ausgehend in einen an den Abschnitt 4 angrenzenden Bereich der Deckelfolie 1 vorstehen. Um ein unkontrolliertes Weiterreißen der den Eindrückbereich 5 seitlich begrenzenden Aufreißlinien 6, 6' zu unterbinden, sind die freien Enden der Aufreißlinien 6, 6' nach außen gekrümmt.In the embodiment of Fig. 5 the indentation region 5 is arranged at a greater distance from the container wall in a middle region of the cover film 1. The indentation region 5 is limited in this embodiment by two tear lines 6, 6 ', which project from the edge of a tongue 4, starting in a region adjacent to the portion 4 of the lid sheet 1. In order to prevent an uncontrolled tearing of the indentation 5 laterally limiting tear lines 6, 6 ', the free ends of the tear lines 6, 6' are curved outwards.

Die Deckelfolie 1 besteht vorzugsweise aus einem mehrschichtigen Laminat, welches eine Deckschicht aus Polyester, orientiertem Polypropylen oder orientiertem Polyamid aufweist und eine Trägerschicht aus einem siegelfähigen Polymer, insbesondere einem Polyethylen, aufweist. Die Deckelfolie 1 kann eine oder mehrere Zwischenschichten als Barriereschichten enthalten. Insbesondere weist die Deckelfolie 1 eine Zwischenschicht aus einer Metallfolie oder einem metallisierten Polymer auf. Als Deckelfolie 1 ist insbesondere auch ein mehrlagiger Kaschierverbund geeignet, der eine durch Spannung in den Lagen des Kaschierverbundes erzeugte Rollneigung aufweist. Die Rollneigung bewirkt, dass sich die Zunge 4 bzw. ein aufzureißender Streifen 9 aufrichtet, wenn die Deckelfolie 1 im Eindrückbereich 5 zum Öffnen der Verpackung eingedrückt wird. Eine Rollneigung der Deckelfolie 1 begünstigt die Handhabung beim Aufreißen der Deckelfolie und Öffnen der Verpackung.The cover sheet 1 is preferably made of a multilayer laminate which has a cover layer of polyester, oriented polypropylene or oriented Polyamide and a carrier layer of a sealable polymer, in particular a polyethylene having. The lidding film 1 may contain one or more intermediate layers as barrier layers. In particular, the cover film 1 has an intermediate layer of a metal foil or a metallized polymer. As a cover sheet 1, a multi-layer laminating composite is particularly suitable which has a tendency to curl generated by tension in the layers of Kaschierverbundes. The tendency to curl causes the tongue 4 or a strip 9 to be torn open, when the lidding film 1 is pressed in the indentation region 5 to open the packaging. A curl of the lidding film 1 favors the handling when tearing the lidding film and opening the packaging.

Die Schwächungslinie 3 zum Aufreißen der Deckelfolie 1 und die Aufreißlinien 6, 6' zur Begrenzung des Eindrückbereiches 5 durchsetzen vorzugsweise nur die Deckschicht der Deckelfolie 1, während zumindest die auf dem Rand des Behälters zu befestigende Trägerschicht unversehrt bleibt. Die Schwächungslinie 3 sowie die Aufreißlinien 6, 6' können aus Laserschnitten, Stanzlinien oder in die Deckschicht eingebrachten Perforationen bestehen.The line of weakness 3 for rupturing the cover film 1 and the tear lines 6, 6 'for limiting the indentation region 5 preferably only pass through the cover layer of the cover film 1, while at least the carrier layer to be fastened to the edge of the container remains intact. The weakening line 3 and the tear lines 6, 6 'can consist of laser cuts, punched lines or perforations introduced into the cover layer.

Claims (12)

  1. A lid film for containers, wherein the lid film (1) is provided with a weakening line (3) for tearing open, wherein a depression region (5) is provided next to the weakening line (3) section, which is at least the size of a fingertip and limited on at least one side of its surface by a tear-open line (6) and wherein the tear-open line (6) limiting the depression region (5), protrudes, starting from the weakening line (3), into a region of the lid film (1) which is adjacent to the section (4) of the lid film (1) detachable along the weakening line (3), characterized in that the lid film (1) consists of a multi-layer laminate and comprises a tendency to curl generated by tensions in the layers of the laminate.
  2. The lid film (1) according to claim 1, characterised in that the section (4) adjacent to the depression region (5) and detachable from the lid film has the shape of a tongue.
  3. The lid film (1) according to claim 1 or 2, characterised in that the depression region (5) is limited by the tear-open line (6) and an edge zone (7) which can be fastened onto a container.
  4. The lid film (1) according to claim 1 or 2, characterised in that the depression region (5) is limited by two tear-open lines (6, 6') which starting from the boundary of the tongue (4) protrude into a region of the lid film (1) adjacent to the tongue (4).
  5. The lid film (1) according to claim 4 characterised in that the tear-open lines (6, 6') are radially aligned.
  6. The lid film (1) according to claim 4 or 5, characterised in that the tear-open lines (6, 6') limiting the depression region (5) extend as far as the edge (8) of the lid film (1) or an edge zone (7) of the lid film (1) which can be fastened onto a container (2).
  7. The lid film (1) according to one of claims 1 to 6, characterised in that the weakening line (3) for tearing the lid film (1) open comprises two ends, wherein a first end extend as far as the edge (8) of the lid film and wherein the second end of the weakening line (3) extends at a distance from the edge (8) of the lid film (1), which limits a tear-open strip
  8. The lid film (1) according to claim 7 characterised in that the second end of the weakening line (3) ends in a spiral-shaped section (10) limiting tear propagation, which is bent back to the weakening line (3).
  9. The lid film (1) according to one of claims 1 to 6, characterised in that the weakening line (3) forms a closed ring.
  10. The lid film (1) according to one of claims 1 to 9, characterised in that the lid film (1) comprises a carrier layer made from a sealable polymer and at least one further layer as a covering layer.
  11. The lid film (1) according to claim 10 characterised in that the carrier layer is implemented as a sealable peeling layer.
  12. The lid film (1) according to one of claims 1 to 11, characterised in that the weakening line (3) for tearing the lid film (1) open and the tear-open line (6, 6') for limiting the depression region (5) consists of laser cuttings, punching lines or perforations created in the covering layer.
EP20120167549 2012-05-10 2012-05-10 Cover film for container Not-in-force EP2662309B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016034462A1 (en) * 2014-09-02 2016-03-10 Nestec S.A. Packaging for storing and/or cooking a food product and cover therefor
US10575618B2 (en) * 2015-09-22 2020-03-03 Compharm Applicator of liquids from openable capsules
US10937341B2 (en) * 2018-09-17 2021-03-02 Apple Inc. Peel-able, tamper-evident security label for concealing information
CN109300392A (en) * 2018-10-22 2019-02-01 海南亚元防伪技术研究所（普通合伙） Anti- recycling label can be removed

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Publication number Priority date Publication date Assignee Title
US3144194A (en) * 1961-11-06 1964-08-11 Chicago Carton Co Popcorn package
US3158491A (en) * 1963-02-26 1964-11-24 American Can Co Food container
US3244356A (en) * 1964-02-06 1966-04-05 Container Corp Tray cover with guard
US4030630A (en) * 1975-06-18 1977-06-21 Penland Container, Inc. All plastic reclosable container closure
US5492703A (en) * 1994-08-30 1996-02-20 Gics & Vermee, L.P. Food package including a food package tray partially surrounded by a food package jacket and an associated method
EP1544127B1 (en) 2003-12-16 2008-08-27 Amcor Flexibles Europe Package with perforable lid
US20100018974A1 (en) * 2008-07-24 2010-01-28 Deborah Lyzenga Package integrity indicating closure

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