EP1559658B1 - Elément de fermeture étampé, en forme de couvercle à double couche - Google Patents

Elément de fermeture étampé, en forme de couvercle à double couche Download PDF

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Publication number
EP1559658B1
EP1559658B1 EP05450003A EP05450003A EP1559658B1 EP 1559658 B1 EP1559658 B1 EP 1559658B1 EP 05450003 A EP05450003 A EP 05450003A EP 05450003 A EP05450003 A EP 05450003A EP 1559658 B1 EP1559658 B1 EP 1559658B1
Authority
EP
European Patent Office
Prior art keywords
layer
lid
adhesive
layers
element according
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.)
Expired - Lifetime
Application number
EP05450003A
Other languages
German (de)
English (en)
Other versions
EP1559658A3 (fr
EP1559658A2 (fr
Inventor
Andreas Niederer
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.)
Constantia Flexibles Group GmbH
Original Assignee
Constantia Teich 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 Constantia Teich GmbH filed Critical Constantia Teich GmbH
Priority to SI200531292T priority Critical patent/SI1559658T1/sl
Priority to PL05450003T priority patent/PL1559658T3/pl
Publication of EP1559658A2 publication Critical patent/EP1559658A2/fr
Publication of EP1559658A3 publication Critical patent/EP1559658A3/fr
Application granted granted Critical
Publication of EP1559658B1 publication Critical patent/EP1559658B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • 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
    • B65D2581/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D2581/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within
    • B65D2581/3437—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within specially adapted to be heated by microwaves

Definitions

  • the present invention relates to a lid-shaped punched-out element for closing containers consisting of two layers with at least one integrated within these layers opening aid, the layers are adhesively bonded by means of a peelable adhesive layer, but the opening aid is adhesive-free and wherein the arranged in the direction of the container layer a Having provided with perforations or predetermined breaking points plastic layer.
  • the invention further relates to a method for producing this two-layer closure element.
  • a two-layer closure element for microwave containers which has a metal layer and further arranged in the direction of the container edge heat-reactivatable plastic layer.
  • a crosslinking reaction takes place within the heat-reactivatable plastic layer in the area of the sealed seam, so that an airtight closure of the container is made possible by forming the sealed seam.
  • This thermally reactable plastic layer may further have perforations, so that the formation of an overpressure in the container during the warming up or cooking of the contents by microwaves is prevented.
  • the according to European Patent No. 457,629 described two-layer closure elements are prepared by coextrusion of the heat-reactivatable plastic layer to a metallic layer as an outer layer in the form of roll goods.
  • This roll product is used for the packaging process, which is continuous.
  • the punching in the form of individual closure elements is not possible because the composite produced by coextrusion is in a loose arrangement, so that when handling a shift of the layers takes place.
  • a shift or slipping of the material layers is according to DE 195 23 754 and DE 37 06 962 insofar avoided as a partially applied adhesive layer between the layers of material is used for producing peelable cover.
  • the adhesive-free area serves to facilitate peeling (peeling) for the consumer due to an integrated grip tab.
  • at least one material layer has incisions which serve to form a removal opening during separation (peeling) of the material layers.
  • a bonding strength is increased between the layers of material compared to the rest of the area, so that all layers of material can be removed during the separation (peeling) of the cover in the area of the cuts, whereby the removal opening is formed.
  • these cuts are according to the DE 195 23 754 and the DE 37 06 962 covered by the adjacent adhesive layer, so that the penetration of adhesive can not be completely avoided when a food container is closed with the peelable lid.
  • the invention aims to remedy this situation.
  • a two-layer closure element of the aforementioned type is proposed, which is characterized in that the plastic layer in the region of their perforations or predetermined breaking points is adhesive-free and provided on its side facing the container edge with a heat-sealable layer, whose seal seam strength greater than the seal seam strength generated between the layers is.
  • the invention further relates to a method for producing the closure element according to the invention, wherein the layers of the closure element are produced in the form of a pre-composite in a first process step, wherein for forming the layer facing the container a heat-sealable layer on a plastic layer laminated and attached to the plastic layer perforations or predetermined breaking points, and then by cold laminating the layers of the closure element glued together, but the area of the perforations or predetermined breaking points on the plastic layer and the area of the opening aid remain adhesive-free.
  • the individual layers 2 and 3 are produced in the form of a pre-bond.
  • an aluminum foil whose thickness is in a range of 10 to 100 mm is used.
  • plastic films in a thickness range of 10 to 100 mm.
  • the plastics can be selected from the group consisting of polypropylene, polyethylene, polyester, polyacrylate, polyamide or polystyrene.
  • This metal or plastic film 7 can now be provided on its surface facing the viewer side with a printed image.
  • This can be both smooth and rough in its surface design.
  • the surface roughness results from irregular, but also regular arrangement of the print motifs the desired print image.
  • the surface roughness facilitates the unstacking of the usually stored in magazines one above the other closure elements.
  • the film 7 is provided exclusively with a heat-sealable layer 8.
  • This may be in the form of a heat sealing lacquer, a coextrusion coating or a peelable plastic film.
  • the layer 3 facing the container is produced.
  • a plastic film 5 for example a polypropylene film with a thickness of 10 to 100 mm, with a heat-sealable layer 9, laminated.
  • This coating may also be in the form of a heat sealing lacquer, a coextrusion coating or a peelable plastic film, the sealing seam strength of which, owing to selection, chemical constitution and degree of crosslinking of the components, must be higher than that of the layer 8.
  • seal seam strength produced by the layer 9 is intended to assure the airtight closure of the package or container, whereas the seal seam strength produced by the layer 8 will effect the joining of the layers 2 and 3, but at the same time the " peel " to allow the detachment of the layers from each other.
  • the heat-sealable layer 9, which is laminated to the plastic film 5, is advantageously applied in the form of a surface-rough imprint 10. This is done as in Fig. 1b shown, for example, by the addition of additives such as silicon particles. Due to the surface roughness generated, the unstacking process when using the closure elements 1 according to the invention is substantially facilitated. This is because air is trapped between the superficially applied "deformations" and therefore the individual closure elements can be easily removed from each other during unstacking. This process can be further improved by the fact that - as in Fig.
  • spacers 11 include, due to their geometric arrangement, in the equally regularly spaced spaces air, so that the Entstapelungsvorgang is additionally facilitated. This is particularly necessary if, as in the case of food, when packaging the containers must be closed quickly.
  • pre-composite layers 2 and 3 of the closure element according to the invention are now in a cold laminating process, as in Fig. 2 shown, glued together.
  • a storage container 12 of the adhesive for example, a polyurethane adhesive, scooped by means of an applicator roll 13 from the container, at the same time with the aid of the sizing roll 14, the order volume can be controlled.
  • a dispersion containing acrylic acid ester copolymers can be used become. This dispersion, available under the name Flexbond ®, is plasticizer-free and therefore particularly well suited for food packaging.
  • the metal layer containing the layer 2 is now withdrawn and pressed by means of pressure rollers 18, 18 'with the plastic layer and already the adhesive 4 having position.
  • the areas for the opening aid 20 are arranged such that they remain adhesive as well as the perforations or predetermined breaking points 6.
  • the layers 2 and 3 are glued together, so that the closure element 1 'is produced.
  • the likewise adhesive-free opening aid such as the grip tab 20, 20 'is formed.
  • the closure elements 1 according to the invention are stored in stacks after punching and can be supplied for further use, namely the closing of food containers.
  • microwave container 19 which are already filled with food, continuously covered with the closure element according to the invention and hermetically sealed by means of sealing tools.
  • the predetermined breaking points or perforations 6 on the plastic layer are now exposed, whereas the adhesive, as in FIG Fig.
  • the closure element 1 according to the invention not only facilitates the closing of food containers, such as microwave containers, since mutual shifting or slipping of the individual layers is prevented by the adhesive layer, but also by the peelability of the adhesive Type of penetration of glue into the food container, so in the food, in any case avoided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Packages (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Clamps And Clips (AREA)
  • Air Bags (AREA)
  • Telephone Function (AREA)
  • Catching Or Destruction (AREA)
  • Moulding By Coating Moulds (AREA)
  • Cartons (AREA)
  • Wrappers (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Wire Bonding (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Claims (14)

  1. Elément (1) découpé en forme de couvercle pour fermer des conteneurs (19), consistant en deux couches (2, 3) avec au moins une aide à l'ouverture (20) intégrée entre ces deux couches, les couches (2, 3) étant collées ensemble au moyen d'une couche d'adhésif pelable, l'aide à l'ouverture (20) étant toutefois exempte d'adhésif et la couche (3) disposée en direction du conteneur (19) comportant une couche de matière plastique (5) munie de perforations ou de points de rupture (6), caractérisé en ce que la couche de matière plastique (5) est exempte d'adhésif dans la zone de ses perforations ou points de rupture (6) et en ce qu'elle est munie sur sa face dirigée vers le bord du conteneur d'une couche thermoscellable (9) dont la résistance du joint scellé est supérieure à la résistance du joint scellé créé entre les couches (2) et (3).
  2. Elément découpé en forme de couvercle selon la revendication 1, caractérisé en ce que la couche d'adhésif (4) consiste dans un adhésif polyuréthanique.
  3. Elément découpé en forme de couvercle selon la revendication 1 ou 2, caractérisé en ce que les couches (2, 3) de l'élément sont en monomatières ou en matières composites.
  4. Elément découpé en forme de couvercle selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la couche (2) opposée au conteneur consiste dans un film métallique, de préférence dans un film en aluminium.
  5. Elément découpé en forme de couvercle selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la couche de matière plastique (5) munie de perforations ou de points de rupture (6) consiste dans des matières plastiques choisies dans le groupe polypropylène, polyéthylène, polyester, polyacrylate, polyamide, polystyrène, ainsi que dans des copolymères créés à partir de ces dernières.
  6. Elément découpé en forme de couvercle selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la couche (2) opposée au conteneur est munie sur sa face superficielle dirigée vers la couche d'adhésif pelable d'une couche thermoscellable (8).
  7. Elément découpé en forme de couvercle selon l'une quelconque des revendications 1 à 6, caractérisé en ce que la couche (2) opposée au conteneur comporte sur sa face superficielle opposée à la couche d'adhésif pelable une image imprimée, le cas échéant avec une surface rugueuse.
  8. Elément découpé en forme de couvercle selon l'une quelconque des revendications 1 à 7, caractérisé en ce que la couche thermoscellable (9) présente une surface rugueuse.
  9. Elément de fermeture selon la revendication 8, caractérisé en ce que la couche thermoscellable (9) se présente sous la forme d'écarteurs (11) à disposition géométrique.
  10. Elément découpé en forme de couvercle selon l'une quelconque des revendications 1 à 9, caractérisé en ce que l'aide à l'ouverture (20) présente la forme d'une patte de préhension.
  11. Elément découpé en forme de couvercle selon la revendication 10, caractérisé en ce que la patte de préhension (20, 20') est présente dans les deux couches de l'élément.
  12. Procédé de fabrication d'un élément de fermeture (1) en deux couches, découpé en forme de couvercle selon l'une quelconque des revendications 1 à 11, caractérisé en ce que les couches (2, 3) de l'élément de fermeture sont fabriqués sous la forme de prélaminés, pour la création de la couche (3), la couche thermoscellable (9) étant laminée sur la couche de matière plastique (5), en ce que sur la couche de matière plastique (5) sont prévu(e)s des perforations ou des points de rupture (6) et en ce qu'ensuite les couches (2, 3) sont collées l'une sur l'autre dans un processus de laminage à froid, les zones des perforations ou des points de rupture (6) sur la couche de matière plastique (5) ainsi que la zone de l'aide à l'ouverture (20, 20') restant exemptes d'adhésif.
  13. Procédé selon la revendication 12, caractérisé en ce que le processus de laminage à froid est commandé par des éléments de réglage, de sorte que les perforations ou les points de rupture (6) sur la couche (3) présentant la couche de matière plastique (5) ainsi que la zone de l'aide à l'ouverture (20, 20') restent exemptes d'adhésif.
  14. Procédé selon la revendication 13, caractérisé en ce que lors du laminage à froid, l'adhésif (4) est appliqué sous la forme d'un motif strié et en ce que par cette application sous forme striée, les perforations ou points de rupture (6) sur les couches (3) comportant la couche de matière plastique (5) restent exemptes d'adhésif.
EP05450003A 2004-02-02 2005-01-13 Elément de fermeture étampé, en forme de couvercle à double couche Expired - Lifetime EP1559658B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200531292T SI1559658T1 (sl) 2004-02-02 2005-01-13 Dvoslojni, štancan zaporni element v obliki pokrova
PL05450003T PL1559658T3 (pl) 2004-02-02 2005-01-13 Dwuwarstwowy, wycięty w kształcie wieczka element zamykający

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0014604A AT500536B8 (de) 2004-02-02 2004-02-02 Zweilagiges, deckelförmig ausgestanztes verschlusselement
AT1462004 2004-02-02

Publications (3)

Publication Number Publication Date
EP1559658A2 EP1559658A2 (fr) 2005-08-03
EP1559658A3 EP1559658A3 (fr) 2006-11-02
EP1559658B1 true EP1559658B1 (fr) 2011-03-02

Family

ID=34637613

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05450003A Expired - Lifetime EP1559658B1 (fr) 2004-02-02 2005-01-13 Elément de fermeture étampé, en forme de couvercle à double couche

Country Status (10)

Country Link
US (1) US7789262B2 (fr)
EP (1) EP1559658B1 (fr)
AT (2) AT500536B8 (fr)
DE (1) DE502005011021D1 (fr)
DK (1) DK1559658T3 (fr)
ES (1) ES2357842T3 (fr)
HR (1) HRP20110159T1 (fr)
PL (1) PL1559658T3 (fr)
PT (1) PT1559658E (fr)
SI (1) SI1559658T1 (fr)

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* Cited by examiner, † Cited by third party
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EP4025521B1 (fr) * 2019-09-05 2024-01-10 Sonoco Development, Inc. Couvercle à membrane avec système de languette à deux étages intégré

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DK1559658T3 (da) 2011-06-06
HRP20110159T1 (hr) 2011-04-30
ATE500163T1 (de) 2011-03-15
ES2357842T3 (es) 2011-05-03
AT500536B8 (de) 2007-02-15
AT500536A1 (de) 2006-01-15
AT500536B1 (de) 2006-07-15
EP1559658A3 (fr) 2006-11-02
US20050247713A1 (en) 2005-11-10
EP1559658A2 (fr) 2005-08-03
US7789262B2 (en) 2010-09-07
DE502005011021D1 (de) 2011-04-14
PL1559658T3 (pl) 2011-07-29
PT1559658E (pt) 2011-03-14
SI1559658T1 (sl) 2011-06-30

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