EP1575840A1 - Aluminium packaging material - Google Patents

Aluminium packaging material

Info

Publication number
EP1575840A1
EP1575840A1 EP03813567A EP03813567A EP1575840A1 EP 1575840 A1 EP1575840 A1 EP 1575840A1 EP 03813567 A EP03813567 A EP 03813567A EP 03813567 A EP03813567 A EP 03813567A EP 1575840 A1 EP1575840 A1 EP 1575840A1
Authority
EP
European Patent Office
Prior art keywords
lid
packaging material
aluminum
tensile strength
packaged goods
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.)
Withdrawn
Application number
EP03813567A
Other languages
German (de)
French (fr)
Inventor
Wilhelm Zuser
Franz Reiterer
Lambert Nekula
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.)
L Nusser GmbH
Original Assignee
L Nusser 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 L Nusser GmbH filed Critical L Nusser GmbH
Publication of EP1575840A1 publication Critical patent/EP1575840A1/en
Withdrawn legal-status Critical Current

Links

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
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • 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

Definitions

  • the invention relates to a packaging material made of aluminum and a lid for closing containers, which can be produced from this packaging material.
  • packaging material made of aluminum in particular for food or other sensitive packaging material, such as pharmaceuticals.
  • the advantage of aluminum as a packaging material is its versatility in processing, as well as the appropriate means of closing, its stability against external influences. For example, foods that are packaged in aluminum packaging material are protected against atmospheric moisture and against the ingress of contaminants.
  • the aluminum which is mainly stored in rolls, is further processed by rolling to the desired material thickness. Due to the contact pressure during the rolling process, very thin layers of material are sometimes produced, the separation of which can lead to difficulties.
  • lids for closing containers which are usually provided by punching out the roll goods mentioned above. After punching, the aluminum lids are stored in a stack. Before they can be used again, such as packaging food, the lids must be unstacked quickly, with high cycle times required for packaging, particularly in the case of highly sensitive packaged goods, such as dairy products, in order to prevent any contamination from penetrating into the packaged goods.
  • the lids due to the relatively low layer thickness of these lids, they adhere strongly to one another, so that the required cycle times during unstacking cannot be maintained.
  • the invention seeks to remedy this.
  • a packaging material made of aluminum which is characterized in that the tensile strength of aluminum is in a range from 90 to 180 N / mm 2 .
  • the invention further relates to a lid for closing containers with a sealing layer attached to the side facing the packaged goods, according to the invention this lid made of a packaging material made of aluminum of the aforementioned type, namely with a tensile strength of 90 to 180 N / mm 2 , preferably 100 to 160 N / mm 2 .
  • a tensile strength of 90 to 180 N / mm 2 preferably 100 to 160 N / mm 2 .
  • This sketch shows a possible embodiment of the lid 1 according to the invention with a surface-rough coating 2 for closing containers.
  • the packaging material according to the invention is, as usual, as a roll would be stored and then brought to the appropriate material thickness, for example to a thickness of 20 to 60 ⁇ m by rolling.
  • the aluminum is then annealed.
  • This annealing process can be carried out, for example, by means of strip annealing, the aluminum being supplied to the annealing channel in the form of a strip.
  • the removal rate and thus the length of time that the aluminum strip stays in the annealing duct are also decisive for the tensile strength generated.
  • the annealing process can be carried out, for example, by "coil annealing", the aluminum being introduced into the annealing furnace in the form of the entire roll.
  • the aluminum is annealed for a period of 42 hours at 150 ° C and constant temperature.
  • the aluminum treated in this way is then cooled in a roll, the cooling process taking place over a period of about 36 hours to about 20 ° C. at room temperature.
  • the recrystallization (recrystallization) is only partially effected in the case of semi-hard aluminum, whereas the recrystallization is completely completed in the case of soft aluminum.
  • Hard aluminum shows no tendency towards recrystallization.
  • the range of semi-hard aluminum is in a range for the tensile strength of 90 to 180 N / mm 2 , with soft aluminum with a scattering range of ⁇ 10 N / mm 2 being below 70 N / mm 2 .
  • the tensile strength values of hard aluminum are above a limit of ⁇ 10 N / mm 2 starting at around 190 N / mm 2 .
  • the aluminum packaging material produced according to the invention which has a tensile strength in the range from 90 to 180 N / mm 2 , is then further processed, for example, to produce lids for closing containers.
  • the roller would be coated at least on one side with a sealing wax.
  • the rolled goods are coated on one or both sides with a surface-rough coating.
  • this rough surface coating 2 consists, for example, of a point varnish which has been applied to the packaging material 3 according to the invention.
  • the rough surface coating can either be provided by printing, ie using appropriately prepared pressure rollers, or by extrusion.
  • the surface roughness within the cross section of the lid width in the area of the sealed seam for closing the container is lower than in comparison of the remaining surface area.
  • the packaging material can then be punched out in the form of roll goods, as usual, to form cover elements or provided with a predetermined breaking point, as shown as weakening line 5 according to the figure.
  • cover elements provided with the weakening lines 5 can be used to close containers, for example for liquid foods, such as drinking yoghurt.
  • the adhesive force within the sealing seam is overcome by applying a scribing force, preferably by means of the grip tab 4, so that a pouring opening corresponding to the line of weakness, ie the predetermined breaking point 5, is created. If the lines of weakness are in the form of notches, the partial opening of the cover element takes place in such a way that the cover element is peeled off along the predetermined breaking point 5 during the opening process.
  • the opening mechanism can also be initiated by pressing in the lid, so that the partial opening of the container and thus the removal of the food, such as a drinking yoghurt, is also made possible in this way.
  • the lid is adequately sealed in the unopened state.
  • This is an essential criterion, in particular when transporting containers which are closed with cover elements which have the predetermined breaking point 5.
  • the containers are often exposed to vibrations, the lid element having to have sufficient tightness so that the packing material, such as yogurt, does not run out.
  • the predetermined breaking point is designed in the form of a perforation in such a way that the packaging material is punched out at a relatively high material depth and therefore no longer withstands shocks, such as during transport, so that the cover element can tear.
  • the packaging material is already fragments 5 exposed to high mechanical loads, so that due to the high material hardness cracks can occur when punching or making the notches.
  • the packaging material according to the invention made of aluminum, which has a tensile strength in a range from 90 to 180 N / mm 2 , can be used, inter alia, to produce cover elements for food containers, which can be easily converted into one after their manufacture and storage Unstack the stack.
  • This ability to unstack can also be increased by providing a surface-rough coating or a surface-rough imprint, so that the cycle times during packaging are further increased.
  • a cover element additionally has a predetermined breaking point for the formation of a pouring opening while a food container is being opened, this predetermined breaking point is, despite a line of weakness in the material, impervious to the ingress of moisture, dirt or bacterial contamination, which is particularly necessary when transporting the containers filled with food Criterion is.

Abstract

The invention relates to aluminium packaging material which exhibits a tensile strength ranging from 90 to 180 N/mm2 and can be used inter alia for producing lid-like elements for food containers. Said elements being produced and stacked, are easily and simply defoldable. The unfolding property can be improved by a rough surface coating or impression in such a way that unfolding time is also improved. When the lid-like element is provided with a rupture area which is used for forming a discharge opening in order to open the food container, said rupture area remains impermeable for water, dirtiness or bacterial impurities in spite of a frangibility line in the material thereof, thereby providing an essential criterion, in particular for transporting filled food containers.

Description

Verpackungsmaterial aus AluminiumAluminum packaging material
Technisches GebietTechnical field
Die Erfindung betrifft ein Verpackungsmaterial aus Aluminium sowie einen Deckel zum Verschließen von Behältern, welcher aus diesem Verpackungsmaterial herstellbar ist.The invention relates to a packaging material made of aluminum and a lid for closing containers, which can be produced from this packaging material.
Stand der TechnikState of the art
Es ist bekannt, Verpackungsmaterial aus Aluminium insbesondere für Lebensmittel oder auch anderes empfindliches Verpackungsgut, wie Pharmazeutika, einzusetzen. Der Vorteil von Aluminium als Verpak- kungsmaterial ist dessen vielfältige Verarbeitbarkeit sowie nach Maßgabe entsprechender Mittel zum Verschließen, dessen Stabilität gegenüber äußere Einflüsse. So sind beispielsweise Lebensmittel, welche in Verpackungsmaterial aus Aluminium verpackt sind, gegenüber Luftfeuchtigkeit sowie gegenüber Eindringen von Verunreinigungen geschützt.It is known to use packaging material made of aluminum, in particular for food or other sensitive packaging material, such as pharmaceuticals. The advantage of aluminum as a packaging material is its versatility in processing, as well as the appropriate means of closing, its stability against external influences. For example, foods that are packaged in aluminum packaging material are protected against atmospheric moisture and against the ingress of contaminants.
Um die vielfältige Verarbeitbarkeit von Aluminium zu gewährleisten, wird das vorwiegend in Rollenware gelagerte Aluminium durch Walzen auf die gewünschte Materialdicke weiterverarbeitet. Dabei werden bedingt durch den Anpreßdruck während des Walzvorganges mitunter sehr dünne Materiallagen hergestellt, deren Auftrennung zu Schwierigkeiten führen kann. Dies trifft auch auf Deckel zum Verschließen von Behältern zu, welche üblicherweise durch Ausstanzen aus der vorgenannten Rollenware bereitgestellt werden. Nach dem Stanzen werden die Deckel aus Aluminium in einem Stapel gelagert. Vor deren weiterer Verwendung, wie das Abpacken von Lebensmitteln, müssen die Deckel rasch entstapelt werden, wobei insbesondere bei hochempfindlichem Packungsgut, wie Molkereiprodukte, hohe Taktzeiten für das Abpacken erforderlich sind, um etwaiges Eindringen von Verunreinigungen in das Packungsgut zu vermeiden. Durch die relativ niedrige Schichtdicke dieser Deckel haften diese jedoch stark aneinander, so daß die erforderlichen Taktzeiten beim Entstapeln nicht eingehalten werden können.In order to ensure the diverse processability of aluminum, the aluminum, which is mainly stored in rolls, is further processed by rolling to the desired material thickness. Due to the contact pressure during the rolling process, very thin layers of material are sometimes produced, the separation of which can lead to difficulties. This also applies to lids for closing containers, which are usually provided by punching out the roll goods mentioned above. After punching, the aluminum lids are stored in a stack. Before they can be used again, such as packaging food, the lids must be unstacked quickly, with high cycle times required for packaging, particularly in the case of highly sensitive packaged goods, such as dairy products, in order to prevent any contamination from penetrating into the packaged goods. However, due to the relatively low layer thickness of these lids, they adhere strongly to one another, so that the required cycle times during unstacking cannot be maintained.
Man ist daher dazu übergegangen, die Deckelelemente oberflächenrau auszugestalten, um den Entstapelungsvorgang zu erleichtern. Dies erfolgt durch Prägen oder durch Maßgabe von oberflachenrauen Beschichtungen. Dadurch kann der Entstapelungsvorgang wesentlich erleichtert werden. Dies ist jedoch hinsichtlich der Taktzeiten beim Entstapeln dadurch limitiert, daß weiches Aluminium, d.h. Aluminium mit niedrigen Zugfestigkeitswerten, zu Verformungen beim Entstapeln neigt. Wird hingegen hartes Aluminium als Verpackungsmaterial eingesetzt, so tritt dieses Phänomen zwar nicht auf, jedoch kann es bei der weiteren Verarbeitung von hartem Aluminium aufgrund dessen hoher Sprödigkeit zu Rissen in der Oberfläche des Verpackungsmaterials kommen.It has therefore gone over to designing the cover elements to have a rough surface in order to facilitate the unstacking process. This is done by embossing or by specifying surface-rough coatings. This can make the unstacking process much easier. However, this is limited with regard to the cycle times during unstacking in that soft aluminum, ie aluminum with low tensile strength values, tends to deform during unstacking. If, on the other hand, hard aluminum is used as packaging material, this phenomenon does not occur, but cracking of the surface of the packaging material can occur during the further processing of hard aluminum due to its high brittleness.
Hier will die Erfindung Abhilfe schaffen.The invention seeks to remedy this.
Darstellung der ErfindungPresentation of the invention
Erfindungsgemäß wird daher ein Verpackungsmaterial aus Aluminium vorgeschlagen, welches dadurch gekennzeichnet ist, daß die Zugfestigkeit von Aluminium in einem Bereich von 90 bis 180 N/mm2 liegt. Besonders vorteilhaft ist Aluminium, dessen Zugfestigkeit in einem Bereich von 100 bis 160 N/mm2 liegt.According to the invention, therefore, a packaging material made of aluminum is proposed, which is characterized in that the tensile strength of aluminum is in a range from 90 to 180 N / mm 2 . Aluminum, whose tensile strength is in a range from 100 to 160 N / mm 2, is particularly advantageous.
Die Erfindung betrifft weiters einen Deckel zum Verschließen von Behältern mit einer an der dem Packungsgut zugewandten Seite angebrachten Siegelschicht, wobei erfindungsgemäß dieser Deckel aus einem Verpackungsmaterial aus Aluminium der vorgenannten Art, nämlich mit einer Zugfestigkeit von 90 bis 180 N/mm2, vorzugsweise 100 bis 160 N/mm2 liegt. Vorteilhafte Ausgestaltungen des erfindungsgemäßen Deckels zum Verschließen von Behältern sind gemäß Unteransprüche geoffenbart.The invention further relates to a lid for closing containers with a sealing layer attached to the side facing the packaged goods, according to the invention this lid made of a packaging material made of aluminum of the aforementioned type, namely with a tensile strength of 90 to 180 N / mm 2 , preferably 100 to 160 N / mm 2 . Advantageous embodiments of the lid according to the invention for closing containers are disclosed according to the subclaims.
Kurze Beschreibung einer Figurendarstellung in Zusammenhang mit einem Weg zur Ausführung der ErfindungBrief description of a figure representation in connection with a way of carrying out the invention
Die Erfindung wird in der Folge an einer möglichen Ausführungsform zur Durchführung der Erfindung sowie anhand einer beispielhaften Skizze näher erläutert. Diese Skizze zeigt eine mögliche Ausführungsform des erfindungsgemäßen Deckels 1 mit einer oberflachenrauen Beschichtung 2 zum Verschließen von Behältern.The invention is explained in more detail below using a possible embodiment for carrying out the invention and using an exemplary sketch. This sketch shows a possible embodiment of the lid 1 according to the invention with a surface-rough coating 2 for closing containers.
Das erfindungsgemäße Verpackungsmaterial wird wie üblich als Rollen- wäre gelagert und anschließend durch Walzen auf die entsprechende Materialdicke, beispielsweise auf eine Dicke von 20 bis 60 μm gebracht. Anschließend wird das Aluminium geglüht. Dieser Glühprozeß kann beispielsweise mittels Bandglühung erfolgen, wobei das Alumini- um von Rolle in Form eines Bandes dem Glühkanal zugeführt wird. Bei diesem Verfahren ist neben der Temperatur im Glühofen auch die Abzugsrate und somit die Verweildauer des Aluminiumbandes im Glühkanal maßgeblich für die erzeugte Zugfestigkeit. Weiters kann der Glühprozeß beispielsweise durch "Coil-Glühung" erfolgen, wobei das Aluminium in Form der gesamten Rolle in den Glühofen eingebracht wird. Dort wird das Aluminium während eines Zeitraumes von 42 Stunden bei 150 °C und konstantem Temperaturverlauf geglüht. Anschließend wird das derart behandelte Aluminium in Rolle abgekühlt, wobei der Kühlvorgang während eines Zeitraums von etwa 36 Stunden auf ca. 20°C bei Raumtemperatur erfolgt. Durch das Einstellen der vorgenannten Parameter wird bei halbhartem Aluminium das nochmalige Auskristallisieren (Rekristallisation) nur teilweise bewirkt, wogegen bei weichem Aluminium die Rekristallisation gänzlich abgeschlossen ist. Hartes Aluminium hingegen weist keinerlei Rekristal- lisationstendenz auf. Der Bereich von halbhartem Aluminium liegt in einem Bereich für die Zugfestigkeit von 90 bis 180 N/mm2, wobei weiches Aluminium mit einem Streubereich von ± 10 N/mm2 unterhalb 70 N/mm2 liegt. Die Zugfestigkeitswerte von hartem Aluminium liegen oberhalb einer Grenze von ± 10 N/mm2 beginnend ab etwa 190 N/mm2.The packaging material according to the invention is, as usual, as a roll would be stored and then brought to the appropriate material thickness, for example to a thickness of 20 to 60 μm by rolling. The aluminum is then annealed. This annealing process can be carried out, for example, by means of strip annealing, the aluminum being supplied to the annealing channel in the form of a strip. In this process, in addition to the temperature in the annealing furnace, the removal rate and thus the length of time that the aluminum strip stays in the annealing duct are also decisive for the tensile strength generated. Furthermore, the annealing process can be carried out, for example, by "coil annealing", the aluminum being introduced into the annealing furnace in the form of the entire roll. There, the aluminum is annealed for a period of 42 hours at 150 ° C and constant temperature. The aluminum treated in this way is then cooled in a roll, the cooling process taking place over a period of about 36 hours to about 20 ° C. at room temperature. By setting the aforementioned parameters, the recrystallization (recrystallization) is only partially effected in the case of semi-hard aluminum, whereas the recrystallization is completely completed in the case of soft aluminum. Hard aluminum, on the other hand, shows no tendency towards recrystallization. The range of semi-hard aluminum is in a range for the tensile strength of 90 to 180 N / mm 2 , with soft aluminum with a scattering range of ± 10 N / mm 2 being below 70 N / mm 2 . The tensile strength values of hard aluminum are above a limit of ± 10 N / mm 2 starting at around 190 N / mm 2 .
Das erfindungsgemäß hergestellte Verpackungsmaterial aus Aluminium welches eine Zugfestigkeit im Bereich von 90 bis 180 N/mm2 aufweist, wird anschließend beispielsweise zur Herstellung von Deckeln zum Verschließen von Behältern weiterverarbeitet. Dafür wird die Rollen- wäre zumindest einseitig mit einem Siegellack beschichtet. Zusätzlich - um eine Verbesserung beim Entstapeln zu gewährleisten - wird die Rollenware ein- oder beidseitig mit einer oberflachenrauen Beschichtung versehen. Gemäß Figurendarstellung besteht diese ober- flächenraue Beschichtung 2 beispielsweise aus einem Punktelack, welcher auf das erfindungsgemäße Verpackungsmaterial 3 aufgetragen wurde. Die oberflächenraue Beschichtung kann entweder durch Bedruk- ken, d.h. mit Anwendung von entsprechend vorbereiteten Druckwalzen oder durch Extrusion bereitgestellt werden. Besonders vorteilhaft ist es, wenn die Oberflächenrauigkeit innerhalb des Querschnittes der Deckelbreite im Siegelnahtbereich zum Verschließen des Behälters niedriger ist als im Vergleich des verbleibenden Oberflächenbereiches. Dies ermöglicht ein besonders luftdichtes Verschließen des Behälters, was insbesondere für hochempfindliches Packungsgut, wie Molkereiprodukte, wesentlich ist. Anschließend kann das Verpackungs- material in Form von Rollenware wie üblich zu Deckelelementen gestanzt oder mittels einer Sollbruchstelle, wie sie gemäß Figur als Schwächungslinie 5 dargestellt ist, versehen werden. Diese mit den Schwächungslinien 5 versehenen Deckelelemente können zum Verschließen von Behältern, beispielsweise für flüssige Lebensmittel, wie Trinkjoghurt, verwendet werden. Zum Öffnen des Behälters wird die Klebekraft innerhalb der Siegelnaht durch Anwendung einer Anreißkraft, vorzugsweise mittels der Grifflasche 4 überwunden, so daß eine Ausgießöffnung entsprechend der Schwächungslinie, d.h. der Sollbruchstelle 5 entsteht. Sind die Schwächungslinien in Form von Einkerbungen ausgebildet, so erfolgt das partielle Öffnen des Dek- kelelementes derart, daß beim Öffnungsvorgang das Deckelelement entlang der Sollbruchstelle 5 abgeschält wird.The aluminum packaging material produced according to the invention, which has a tensile strength in the range from 90 to 180 N / mm 2 , is then further processed, for example, to produce lids for closing containers. For this, the roller would be coated at least on one side with a sealing wax. In addition - to ensure an improvement in destacking - the rolled goods are coated on one or both sides with a surface-rough coating. According to the representation of the figures, this rough surface coating 2 consists, for example, of a point varnish which has been applied to the packaging material 3 according to the invention. The rough surface coating can either be provided by printing, ie using appropriately prepared pressure rollers, or by extrusion. It is particularly advantageous if the surface roughness within the cross section of the lid width in the area of the sealed seam for closing the container is lower than in comparison of the remaining surface area. This enables the container to be closed in a particularly airtight manner, which is essential, in particular, for highly sensitive packaged goods, such as dairy products. The packaging material can then be punched out in the form of roll goods, as usual, to form cover elements or provided with a predetermined breaking point, as shown as weakening line 5 according to the figure. These cover elements provided with the weakening lines 5 can be used to close containers, for example for liquid foods, such as drinking yoghurt. To open the container, the adhesive force within the sealing seam is overcome by applying a scribing force, preferably by means of the grip tab 4, so that a pouring opening corresponding to the line of weakness, ie the predetermined breaking point 5, is created. If the lines of weakness are in the form of notches, the partial opening of the cover element takes place in such a way that the cover element is peeled off along the predetermined breaking point 5 during the opening process.
Bestehen die Schwächungslinien 5 jedoch aus Perforationen, so läßt sich" der Öffnungsmechanismus auch durch Eindrücken des Deckels einleiten, so daß auch auf diese Weise die partielle Öffnung des Behälters und damit die Entnahme des Lebensmittels, wie beispielsweise einer Trinkjoghurt, ermöglicht ist.However, if the weakening lines 5 consist of perforations, "the opening mechanism can also be initiated by pressing in the lid, so that the partial opening of the container and thus the removal of the food, such as a drinking yoghurt, is also made possible in this way.
Durch Maßgabe des erfindungsgemäßen Verpackungsmaterials aus Aluminium mit einer Zugfestigkeit von 90 bis 180 N/mm2 ist trotz Vorliegen einer Sollbruchstelle 5 eine ausreichende Dichtigkeit des Dek- kels im ungeöffneten Zustand gegeben. Dies ist ein wesentliches Kriterium, insbesondere beim Transport von Behältern, welche mit Deckelelementen, die die Sollbruchstelle 5 aufweisen, verschlossen sind. Besonders beim Transport mittels LKW sind die Behälter oftmals Erschütterungen ausgesetzt, wobei das Deckelelement ausreichende Dichtigkeit aufweisen muß, so daß das Ausrinnen des Packungsgutes, wie beispielsweise der Joghurt, vermieden wird. Bei besonders wei- ehern Aluminium ist jedoch die Sollbruchstelle in Form einer Perforation derart ausgebildet, daß das Verpackungsmaterial in einer relativ hohen Materialtiefe angestanzt und daher Erschütterungen, wie beispielsweise beim Transport, nicht mehr standhält, so daß das Deckelelement einreißen kann. Bei besonders hartem Aluminium hin- gegen ist das Verpackungsmaterial schon bei Herstellung der Soll- bruchsteile 5 hohen mechanischen Belastungen ausgesetzt, so daß es aufgrund der hohen Materialhärte zu Rißbildungen beim Stanzen oder beim Herstellen der Einkerbungen kommen kann.By virtue of the packaging material according to the invention made of aluminum with a tensile strength of 90 to 180 N / mm 2 , despite the presence of a predetermined breaking point 5, the lid is adequately sealed in the unopened state. This is an essential criterion, in particular when transporting containers which are closed with cover elements which have the predetermined breaking point 5. Particularly when transported by truck, the containers are often exposed to vibrations, the lid element having to have sufficient tightness so that the packing material, such as yogurt, does not run out. In the case of particularly aluminum, however, the predetermined breaking point is designed in the form of a perforation in such a way that the packaging material is punched out at a relatively high material depth and therefore no longer withstands shocks, such as during transport, so that the cover element can tear. In the case of particularly hard aluminum, on the other hand, the packaging material is already fragments 5 exposed to high mechanical loads, so that due to the high material hardness cracks can occur when punching or making the notches.
Gewerbliche AnwendbarkeitIndustrial applicability
Zusammenfassend kann daher gesagt werden, daß durch das erfindungsgemäße Verpackungsmaterial aus Aluminium, welches eine Zugfestigkeit in einem Bereich von 90 bis 180 N/mm2 aufweist, u.a. Deckelelemente für Lebensmittelbehälter hergestellt werden können, welche sich in einfacher Weise nach deren Herstellung und Lagerung in einem Stapel entstapeln lassen. Diese Entstapelbarkeit kann zusätzlich durch Maßgabe einer oberflachenrauen Beschichtung oder eines oberflachenrauen Aufdruckes erhöht werden, so daß die Taktzeiten beim Abpacken weiter erhöht werden. Weist ein Deckelelement zusätzlich eine Sollbruchstelle für die Ausbildung einer Ausgießöffnung während des Offnens eines Lebensmittelbehalters auf, so ist diese Sollbruchstelle trotz einer Schwächungslinie im Material dicht gegenüber Eindringen von Feuchtigkeit, Verschmutzungen oder auch bakteriellen Verunreinigungen, was insbesondere beim Transport der mit Lebensmittel gefüllten Behälter ein notwendiges Kriterium ist. In summary, it can therefore be said that the packaging material according to the invention made of aluminum, which has a tensile strength in a range from 90 to 180 N / mm 2 , can be used, inter alia, to produce cover elements for food containers, which can be easily converted into one after their manufacture and storage Unstack the stack. This ability to unstack can also be increased by providing a surface-rough coating or a surface-rough imprint, so that the cycle times during packaging are further increased. If a cover element additionally has a predetermined breaking point for the formation of a pouring opening while a food container is being opened, this predetermined breaking point is, despite a line of weakness in the material, impervious to the ingress of moisture, dirt or bacterial contamination, which is particularly necessary when transporting the containers filled with food Criterion is.

Claims

Patentansprüche : Claims:
1. Verpackungsmaterial aus Aluminium, dadurch gekennzeichnet, daß die Zugfestigkeit von Aluminium in einem Bereich von 90 bis 180 N/mm2 liegt.1. Packaging material made of aluminum, characterized in that the tensile strength of aluminum is in a range from 90 to 180 N / mm 2 .
2. Verpackungsmaterial nach Anspruch 1, dadurch gekennzeichnet, daß die Zugfestigkeit in einem Bereich von 100 bis 160 N/mm2 liegt .2. Packaging material according to claim 1, characterized in that the tensile strength is in a range from 100 to 160 N / mm 2 .
3. Deckel zum Verschließen von Behältern mit einer an der dem Packungsgut zugewandten Seite angebrachten Siegelschicht, dadurch gekennzeichnet, daß der Deckel aus einem Verpackungsmaterial gemäß Anspruch 1 oder 2 herstellbar ist.3. Lid for closing containers with a sealing layer attached to the side facing the packaged goods, characterized in that the lid can be produced from a packaging material according to claim 1 or 2.
4. Deckel nach Anspruch 3, dadurch gekennzeichnet, daß die Siegelschicht aus einem siegelfähigem Lack besteht.4. Lid according to claim 3, characterized in that the sealing layer consists of a sealable lacquer.
5. Deckel nach Anspruch 3, dadurch gekennzeichnet, daß die Sie- gelschicht aus einer siegelfähigen Coextrusionsschicht besteht .5. Lid according to claim 3, characterized in that the sealing layer consists of a sealable coextrusion layer.
6. Deckel nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß der Deckel an der dem Packungsgut abgewandten Seite einen Aufdruck und/oder eine oberflächenraue Beschichtung aufweist.6. Lid according to one of claims 3 to 5, characterized in that the lid on the side facing away from the packaged goods has an imprint and / or a rough surface coating.
7. Deckel nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, daß der Deckel an der dem Packungsgut zugewandten Seite eine oberflächenraue Beschichtung aufweist.7. Lid according to one of claims 3 to 6, characterized in that the lid has a rough surface coating on the side facing the packaged goods.
8. Deckel nach einem der Ansprüche 3 bis 7, dadurch gekennzeichnet, daß die oberflächenraue Beschichtung in Form geometrisch angeordneter Abstandshalter mit einer Rautiefe zwischen 1 bis 100 μm vorliegt.8. Lid according to one of claims 3 to 7, characterized in that the rough surface coating is in the form of geometrically arranged spacers with a roughness depth between 1 to 100 microns.
9. Deckel nach einem der Ansprüche 3 bis 8, dadurch gekennzeichnet, daß die Rautiefe im Bereich der Siegelnahtkante niedriger ist als im verbleibenden Oberflächenbereich des Deckels. 9. Lid according to one of claims 3 to 8, characterized in that the roughness depth in the area of the sealing seam edge is lower than in the remaining surface area of the lid.
0. Deckel nach einem der Ansprüche 3 bis 9, dadurch gekennzeichnet, daß das Deckelelement eine Sollbruchstelle (5) in Form einer Ausgießöffnung für das Packungsgut aufweist. 0. Lid according to one of claims 3 to 9, characterized in that the lid element has a predetermined breaking point (5) in the form of a pouring opening for the packaged goods.
EP03813567A 2002-12-19 2003-12-11 Aluminium packaging material Withdrawn EP1575840A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT19062002 2002-12-19
AT19062002 2002-12-19
PCT/EP2003/014064 WO2004056672A1 (en) 2002-12-19 2003-12-11 Aluminium packaging material

Publications (1)

Publication Number Publication Date
EP1575840A1 true EP1575840A1 (en) 2005-09-21

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Application Number Title Priority Date Filing Date
EP03813567A Withdrawn EP1575840A1 (en) 2002-12-19 2003-12-11 Aluminium packaging material

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EP (1) EP1575840A1 (en)
AU (1) AU2003296639A1 (en)
WO (1) WO2004056672A1 (en)

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Publication number Priority date Publication date Assignee Title
GB2528289A (en) 2014-07-16 2016-01-20 Kraft Foods R&D Inc A die-cut lid and associated container and method

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
CA2007748C (en) * 1989-08-31 1996-01-02 Eiji Tamura Food packaging container
AT404349B (en) * 1996-03-29 1998-10-27 Teich Ag LID ELEMENT FOR PACKAGING AND METHOD FOR THE PRODUCTION THEREOF
DE59702568D1 (en) * 1996-12-17 2000-12-07 Teich Ag Obergrafendorf SURFACE ROUGH PACKING ELEMENT
DE50101040D1 (en) * 2000-05-04 2004-01-08 Teich Ag Weinburg HOT-SEALABLE MULTILAYER FILM FOR RE-SEALABLE PACKINGS

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004056672A1 *

Also Published As

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WO2004056672A1 (en) 2004-07-08
AU2003296639A1 (en) 2004-07-14

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