EP0160975B1 - Cold or heat sealable multilayer film for a packaging with a tearable and reclosable opening - Google Patents
Cold or heat sealable multilayer film for a packaging with a tearable and reclosable opening Download PDFInfo
- Publication number
- EP0160975B1 EP0160975B1 EP85105604A EP85105604A EP0160975B1 EP 0160975 B1 EP0160975 B1 EP 0160975B1 EP 85105604 A EP85105604 A EP 85105604A EP 85105604 A EP85105604 A EP 85105604A EP 0160975 B1 EP0160975 B1 EP 0160975B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cold
- layer
- packaging
- multilayer film
- tearable
- 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
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
- B65D77/10—Container closures formed after filling
- B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
- B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
- B65D77/2068—Means for reclosing the cover after its first opening
- B65D77/2096—Adhesive means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
- B65D75/52—Details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
- B65D77/10—Container closures formed after filling
- B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
- B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
- B65D77/2028—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1303—Paper containing [e.g., paperboard, cardboard, fiberboard, etc.]
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- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1303—Paper containing [e.g., paperboard, cardboard, fiberboard, etc.]
- Y10T428/1307—Bag or tubular film [e.g., pouch, flexible food casing, envelope, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1334—Nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.]
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- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1334—Nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.]
- Y10T428/1338—Elemental metal containing
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- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1334—Nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.]
- Y10T428/1341—Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
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- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1355—Elemental metal containing [e.g., substrate, foil, film, coating, etc.]
- Y10T428/1359—Three or more layers [continuous layer]
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- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1379—Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T428/14—Layer or component removable to expose adhesive
- Y10T428/1424—Halogen containing compound
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T428/14—Layer or component removable to expose adhesive
- Y10T428/1452—Polymer derived only from ethylenically unsaturated monomer
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- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2813—Heat or solvent activated or sealable
- Y10T428/2817—Heat sealable
- Y10T428/2826—Synthetic resin or polymer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2848—Three or more layers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31725—Of polyamide
- Y10T428/3175—Next to addition polymer from unsaturated monomer[s]
- Y10T428/31757—Polymer of monoethylenically unsaturated hydrocarbon
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- Y10T428/31855—Of addition polymer from unsaturated monomers
- Y10T428/3188—Next to cellulosic
- Y10T428/31895—Paper or wood
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- Y10T428/31917—Next to polyene polymer
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- Y10T428/31913—Monoolefin polymer
- Y10T428/3192—Next to vinyl or vinylidene chloride polymer
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- Y10T428/31855—Of addition polymer from unsaturated monomers
- Y10T428/31909—Next to second addition polymer from unsaturated monomers
- Y10T428/31924—Including polyene monomers
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- Y10T428/31855—Of addition polymer from unsaturated monomers
- Y10T428/31938—Polymer of monoethylenically unsaturated hydrocarbon
Definitions
- Cold-sealable or heat-sealable multilayer films which serve as closure membranes for containers or can even be formed into containers, are already known.
- Conventional multilayer films of this type have the disadvantage that packaging produced therefrom either cannot be closed again at all after opening, or at least cannot be simply put together by hand.
- cold-sealable films can be closed by hand, but only with the use of relatively high pressure and only by pressing two cold-sealable coated surfaces against one another.
- the cold seal coatings also have the disadvantage that they are slightly sticky and therefore cannot be brought into contact with any filling material, e.g. B. not with dusting goods.
- the object of the invention is to provide a cold-sealable or heat-sealable packaging film for reclosable packaging which, after the cold or heat-seal connection has been opened for the first time, can be closed one or more times without any special effort by simply pressing the opened part onto any point on the packaging film.
- the invention relates to a cold or heat sealable packaging film for reclosable packaging according to claim 1.
- Suitable materials for the carrier film 1 are polyesters, such as polyethylene terephthalate, polyamide, biaxially oriented polypropylene, cellophane, polyvinyl chloride and aluminum.
- the cover layer 3 consists of a material with low elongation at break and tear resistance of a suitable layer thickness, namely polyethylene, polypropylene, polyamide, polyvinyl chloride, polycarbonate, polystyrene, cellophane or aluminum.
- predetermined breaking points in the form of weakening lines can be generated in the cover layer along the desired tear line. B. with the help of suitable sealing tools. This also makes it possible to keep the tearing force of the cover layer lower than the cohesive force of the sealing seam.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Wrappers (AREA)
- Packages (AREA)
Description
Die Erfindung betrifft eine kalt- oder heißsiegelbare Verpackungsfolie für wiederverschließbare Verpackungen, welche bei der Kalt- oder Heißversiegelung hermetisch dichte Verschlüsse ergibt, die nach erstmaligem Öffnen mehrmals wieder von Hand verschlossen werden können.The invention relates to a cold or heat sealable packaging film for reclosable packaging, which results in hermetically sealed closures during cold or heat sealing, which can be closed again several times after opening for the first time by hand.
Kalt- oder heißsiegelbare Mehrschichtfolien, die als Verschlußmembranen für Behälter dienen oder selbst zu Behältern geformt werden können, sind bereits bekannt. Herkömmliche Mehrschichtfolien dieser Art haben jedoch den Nachteil, daß daraus hergestellte Verpackungen nach dem Öffnen entweder überhaupt nicht wieder verschlossen werden können oder aber zumindest nicht durch einfaches Zusammenfügen von Hand. Kaltsiegelbare Folien lassen sich zwar bis zu einem gewissen Grad von Hand verschliessen, jedoch nur unter Anwendung von verhältnismäßig hohem Druck und nur durch Gegeneinanderpressen zweier kaltsiegelbar beschichteter Flächen. Den Kaltsiegelbeschichtungen haftet außerdem der Nachteil an, daß sie leicht klebrig sind und deshalb nicht mit jedem beliebigen Füllgut in Kontakt gebracht werden können, z. B. nicht mit stäubenden Gütern.Cold-sealable or heat-sealable multilayer films, which serve as closure membranes for containers or can even be formed into containers, are already known. Conventional multilayer films of this type, however, have the disadvantage that packaging produced therefrom either cannot be closed again at all after opening, or at least cannot be simply put together by hand. To a certain extent, cold-sealable films can be closed by hand, but only with the use of relatively high pressure and only by pressing two cold-sealable coated surfaces against one another. The cold seal coatings also have the disadvantage that they are slightly sticky and therefore cannot be brought into contact with any filling material, e.g. B. not with dusting goods.
Aus der US-A-3 335 939 ist ein Behälter mit einem wiederverschließbaren Deckel in Form einer Mehrschichtfolie bekannt, die eine innere Aluminiumschicht, eine äußere Papierschicht, und eine dazwischenliegende Schicht aus einem Haftkleber umfaßt. Die Aluminiumfolie ist auf der dem Behälter zugewandten Seite mit einer Heißsiegelschicht versehen, die im Außenbereich permanent mit dem Behälterrand verbunden ist Beim Öffnen des Deckels reißt die Aluminiumfolie, wobei die Haftkleberschicht freigelegt wird, die ein Wiederverschließen des Deckels ermöglicht.From US-A-3 335 939 a container with a reclosable lid in the form of a multilayer film is known, which comprises an inner aluminum layer, an outer paper layer, and an intermediate layer of a pressure sensitive adhesive. The aluminum foil is provided with a heat seal layer on the side facing the container, which is permanently connected to the edge of the container on the outside. When the lid is opened, the aluminum foil tears, exposing the pressure-sensitive adhesive layer, which enables the lid to be closed again.
Aufgabe der Erfindung ist es, eine kalt- oder heißsiegelbare Verpackungsfolie für wiederverschließbare Verpackungen bereitzustellen, die nach erstmaligem Öffnen der Kalt- oder Heißsiegelverbindung ohne besondere Kraftanstrengung durch einfaches Andrücken des geöffneten Teiles an eine beliebige Stelle der Verpackungsfolie ein bis mehrmals wieder verschlossen werden kann.The object of the invention is to provide a cold-sealable or heat-sealable packaging film for reclosable packaging which, after the cold or heat-seal connection has been opened for the first time, can be closed one or more times without any special effort by simply pressing the opened part onto any point on the packaging film.
Gegenstand der Erfindung ist eine kalt- oder heißsiegelbare Verpackungsfolie für wiederverschließbare Verpackungen gemäß Anspruch 1.The invention relates to a cold or heat sealable packaging film for reclosable packaging according to
Diese Verpackungsfolie wird im folgenden unter Bezug auf die Zeichnung näher erläutert. Es zeigen :
- Fig. 1a einen schematischen Querschnitt durch eine erfindungsgemäße Verpackungsfolie, die zum Verpacken eines Gegenstandes dient;
- Fig. 1 einen schematischen Querschnitt durch die Verpackung von Fig. 1a, nachdem diese geöffnet und wieder verscnlossen worden ist.
- 1a shows a schematic cross section through a packaging film according to the invention, which is used for packaging an object;
- Fig. 1 shows a schematic cross section through the packaging of Fig. 1a after it has been opened and closed again.
Bei der in den Fig. 1a und 1b gezeigten Ausführungsform dient die Mehrschichtfoiie als Verpackungsmaterial für einen Gegenstand 6. In Fig. 1a ist die verpackung im ungeöffneten Zustand, in Fig. 1 b im geöffneten und wiederverschlossenen Zustand dargestellt.In the embodiment shown in FIGS. 1a and 1b, the multilayer film serves as packaging material for an object 6. In FIG. 1a, the packaging is shown in the unopened state, in FIG. 1b in the opened and reclosed state.
Die dargestellte Mehrschichtfolie umfaßt eine Trägerfolie 1, eine permanent klebende Schicht 2, eine Abdeckschicht 3 aus einem Material von geringer Reißdehnung und Weiterreißfestigkeit, eine Abhäsivschicht 5 sowie gegebenenfalls eine Siegelschicht 4.The multi-layer film shown comprises a
Geeignete Materialien für die Trägerfolie 1 sind Polyester, wie Polyethylenterephthalat, Polyamid, biaxial orientiertes Polypropylen, Zellglas, Polyvinylchlorid und Aluminium.Suitable materials for the
Die permanent klebende Schicht 2 besteht beispielsweise aus Heißschmelzklebem auf Basis von Ethylen-Vinylacetat-Copolymeren, Styrol-Butadien-Stryol-Blockcopolymeren, Styrol-Isopren-Styrol-Blockcopolymeren oder Polyacrylaten oder anderen geeigneten Haftklebstoffen.The permanently
Die Abdeckschicht 3 besteht aus einem Material geringer Reißdehnung und Weiterreißfestigkeit von geeigneter Schichtdicke, nämlich Polyethylen, Polypropylen, Polyamid, Polyvinylchlorid, Polycarbonat, Polystyrol, Zellglas oder Aluminium.The
Wenn das Material der Abdeckschicht 3 selbst siegelfähig ist, wie dies bei Polyethylen der Fall ist, erübrigt sich eine gesonderte Siegelschicht. Andernfalls wird auf die Abdeckschicht eine Siegelschicht 4 aus herkömmlichen Kalt- oder Heißsiegelmedien aufgebracht.If the material of the covering
In Fig. 1 b ist ein Teil des verpackten Gegenstandes, z. B. Schokolade, bereits entnommen, und der Faltverschluß ist an einer anderen Stelle wieder verschlossen. Durch die Abhäsivschicht 5 auf der der permanent klebenden Schicht 2 zugewandten Seite der Abdeckschicht 3 wird ein Kohäsionsbruch der Schicht 2 vermieden und eine nichtklebende Seite der aufgerissenen Naht erhalten. Als Abhäsivmaterialien für die Schicht 5 eignen sich z. B. Silikone.In Fig. 1 b, part of the packaged item, e.g. B. chocolate, already removed, and the folding closure is closed at another point. The
Bei allen vorstehend beschriebenen Ausführungsformen und insbesondere in Anwendungsfällen, bei denen die Mehrschichtfolie größeren mechanischen Belastungen standhalten muß, können in der Abdeckschicht entlang der gewünschten Aufreißlinie Sollbruchstellen in Form von Schwächungslinien erzeugt werden, z. B. mit Hilfe von geeigneten Siegelwerkzeugen. Hierdurch gelingt es zusätzlich, die Aufreißkraft der Abdeckschicht niedriger als die Kohäsionskraft der Siegelnaht zu halten.In all of the embodiments described above and in particular in applications in which the multilayer film has to withstand greater mechanical loads, predetermined breaking points in the form of weakening lines can be generated in the cover layer along the desired tear line. B. with the help of suitable sealing tools. This also makes it possible to keep the tearing force of the cover layer lower than the cohesive force of the sealing seam.
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3416755 | 1984-05-07 | ||
DE19843416755 DE3416755A1 (en) | 1984-05-07 | 1984-05-07 | COLD OR HOT-SEALABLE MULTILAYER FILM FOR RE-SEALABLE PACKAGING |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0160975A2 EP0160975A2 (en) | 1985-11-13 |
EP0160975A3 EP0160975A3 (en) | 1987-04-15 |
EP0160975B1 true EP0160975B1 (en) | 1990-03-28 |
Family
ID=6235094
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85105604A Expired - Lifetime EP0160975B1 (en) | 1984-05-07 | 1985-05-07 | Cold or heat sealable multilayer film for a packaging with a tearable and reclosable opening |
Country Status (3)
Country | Link |
---|---|
US (1) | US4673601A (en) |
EP (1) | EP0160975B1 (en) |
DE (2) | DE3416755A1 (en) |
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-
1984
- 1984-05-07 DE DE19843416755 patent/DE3416755A1/en not_active Withdrawn
-
1985
- 1985-05-06 US US06/730,942 patent/US4673601A/en not_active Expired - Fee Related
- 1985-05-07 EP EP85105604A patent/EP0160975B1/en not_active Expired - Lifetime
- 1985-05-07 DE DE8585105604T patent/DE3576805D1/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10109209C1 (en) * | 2001-02-26 | 2002-10-10 | Nordenia Deutschland Gronau | Resealable plastic film bag and sealing strips for its manufacture |
AU2012278073B2 (en) * | 2011-06-30 | 2015-05-28 | Amcor Flexibles Transpac Nv | Peelable film |
Also Published As
Publication number | Publication date |
---|---|
US4673601A (en) | 1987-06-16 |
EP0160975A3 (en) | 1987-04-15 |
EP0160975A2 (en) | 1985-11-13 |
DE3576805D1 (en) | 1990-05-03 |
DE3416755A1 (en) | 1985-11-07 |
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