EP4031460A1 - Valve for a packaging container - Google Patents

Valve for a packaging container

Info

Publication number
EP4031460A1
EP4031460A1 EP20776108.1A EP20776108A EP4031460A1 EP 4031460 A1 EP4031460 A1 EP 4031460A1 EP 20776108 A EP20776108 A EP 20776108A EP 4031460 A1 EP4031460 A1 EP 4031460A1
Authority
EP
European Patent Office
Prior art keywords
film
membrane
valve
surrounding
frame
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.)
Granted
Application number
EP20776108.1A
Other languages
German (de)
French (fr)
Other versions
EP4031460B1 (en
Inventor
Hans-Peter Stadel
Jenny Haase
Holger Poell
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.)
Syntegon Technology GmbH
Original Assignee
Syntegon Technology 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 Syntegon Technology GmbH filed Critical Syntegon Technology GmbH
Publication of EP4031460A1 publication Critical patent/EP4031460A1/en
Application granted granted Critical
Publication of EP4031460B1 publication Critical patent/EP4031460B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/22—Details
    • B65D77/225—Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element
    • 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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/01—Ventilation or drainage of bags
    • 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
    • B65D2205/00—Venting means
    • 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
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7793—With opening bias [e.g., pressure regulator]
    • Y10T137/7809—Reactor surface separated by apertured partition
    • Y10T137/782—Reactor surface is diaphragm
    • 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
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7879—Resilient material valve
    • Y10T137/788—Having expansible port
    • Y10T137/7882—Having exit lip

Definitions

  • the present invention relates to a valve, in particular a pressure relief valve for a packaging container, according to the preamble of the independent claim.
  • valves are used in packaging technology when the product tends to outgas, such as freshly roasted coffee.
  • EP 760790 B1 discloses a pressure relief valve for a packaging container with a base plate fastened to the wall of the packaging container, which has a central valve hole covering a through hole in the wall of the packaging container, and with one fastened to the base plate with two parallel edge zones , a valve membrane leaving a channel zone free, which covers the valve hole and rests tightly on the base plate in the closed position.
  • the valve hole is formed from at least two intersecting circular openings.
  • a generic pressure relief valve is known which comprises a base body with a two-stage recess and a membrane, the membrane having a deformable surface directed towards a sealing surface.
  • the basic body has a relatively complex structure.
  • Another generic valve is known from EP 602418 B1.
  • a valve for a packaging container is already known from WO 2016/072663 A1, which has at least one base element designed as a cup-shaped plastic or metal component with an opening, at least one frame element designed as a cup-shaped plastic or metal component, which surrounds a free area and at least one membrane which is arranged on the base element and covers the opening, a fluid being provided between the membrane and the base element. Disclosure of the invention
  • the valve according to the invention for a packaging container has the advantage that the valve can be produced and applied in a simpler and more cost-effective manner.
  • the method according to the invention is also distinguished by a significantly reduced use of material.
  • the basic structure of the valve can be applied both outside the packaging container and, in a certain variant, inside the packaging container. According to the invention, this is possible in that the membrane is arranged on a base film in an at least partially floating or freely movable manner within the free area. Because the membrane is connected to a surrounding film via at least one connection point in such a way that the membrane is otherwise freely movable, the membrane is in the form of a sheet when the valve is manufactured and can therefore be incorporated into the structure particularly easily through a continuous sheet of film will. The manufacturing process is further simplified.
  • the membrane is no longer connected to the main body over a large area and is therefore significantly less affected by external influences such as warpage.
  • the surrounding film is open at least at one point, so that a channel is formed. The overpressure can be safely reduced via this. At the same time, however, the surrounding film can be made in one piece. This simplifies handling.
  • the connection point is particularly preferably arranged opposite the channel. The membrane can thus lift off particularly well in the direction of the channel in order to reduce the overpressure in the packaging container.
  • the proposed structure of the base film, frame film and optionally cover film results in high flexural rigidity with comparatively little use of material.
  • the valve according to the invention allows the membrane to be provided with a preload which can be helpful for the functioning of the valve.
  • the valve combines the good valve properties of an injection molded valve with those of a film valve. It offers very low opening and closing pressures.
  • the valve is built up from several layers of film, which are produced, for example, on rotary punching tools and then laminated to one another. The joining is ideally done by a welded connection. Alternatively, an adhesion promoter such as an adhesive could also be used.
  • the proposed valve can preferably be made from a single type of material and is therefore easier to recycle and thus more environmentally friendly and also easier to weld.
  • the film consists of polypropylene. However, renewable materials such as plastics made from renewable raw materials or biodegradable plastics would also be possible.
  • the valve is designed free from the channel.
  • the valve for a packaging container comprises at least one base film with an opening, at least one frame film that surrounds a free area, and at least one membrane that is arranged on the base film and covers the opening, with between the membrane and the base film a fluid is provided, the membrane being connected to a surrounding film via at least one connection point, the surrounding film being connected on one side to the base film and on the other side to the frame film and the membrane being movably arranged within the free area .
  • the membrane is in the form of a sheet when the valve is in the open position and can therefore be introduced into the structure particularly easily by means of a continuous sheet of film.
  • the surrounding film is designed in such a way that it at least partially surrounds the membrane in a circular or U-shaped manner. This geometry ensures easy attachment of the surrounding film to the base film and / or frame film while maintaining the above-mentioned functionality.
  • the thickness of the frame film is greater than the thickness of the membrane, preferably 75% to 225% greater. This enables the membrane to move freely in the direction of the free area.
  • the base film and / or the frame film and / or the cover film are made of polypropylene, OPP, PET, polyolefins or plastic, preferably renewable raw materials or biodegradable plastics.
  • polypropylene, OPP, PET, polyolefins or plastic preferably renewable raw materials or biodegradable plastics.
  • the surrounding film is on one side with the Base film and on the other side connected to the frame film, and the membrane is movably arranged within the free area.
  • a cover film is applied to the frame film.
  • the opening and / or the free area and / or the membrane is punched out. These steps can be carried out very easily with the selected film materials, so that production is further simplified.
  • a fluid is particularly expediently applied to the base film and / or the membrane.
  • the fluid between the base film and the membrane is applied to the base film before the surrounding film with the connected membrane is applied. This ensures that the membrane is securely connected to the base film also in the subsequent production sites.
  • the fluid can only be applied in the applicator that connects the valve to the packaging material.
  • the base film and / or surrounding film and / or frame film and / or cover film are connected, in particular laminated, via a welded connection.
  • undesirable adhesive which is also expensive, can be dispensed with in the manufacturing process due to increased cleaning requirements.
  • this prevents glue from being on the side facing the product.
  • Both the production of the opening and the production of the free area can be carried out in one and the same step with just one punching tool. This further simplifies production. By inserting the membrane in connection with the surrounding film, a high level of positional accuracy can be achieved.
  • Figure 1 shows an embodiment of an external valve in which the membrane is partially connected to the surrounding film
  • FIG. 2 shows a Fiersteller method for the valve according to FIG. 1, in which individual film webs are also punched and welded
  • Figure 3 shows an embodiment of an internal valve in which the membrane is partially connected to the surrounding film.
  • FIG. 1 shows an exemplary embodiment of the valve 8.
  • the valve 8 comprises a base film 10 with at least one opening 11.
  • the opening 11 has, for example, the geometry of two intersecting circles.
  • the membrane 12 is still connected to a surrounding film 20 with at least one, in particular narrow, connecting region 22. However, the majority of the membrane 12 is still freely movable.
  • Membrane 12, connecting area 22 and surrounding film 20 thus consist of a single part.
  • the surrounding film 20 encloses the membrane 12 except for a small channel 18.
  • the at least one connecting point 22 between the surrounding film 20 and the membrane 22 is formed on a middle leg of the surrounding film 20.
  • the membrane 22 and the surrounding film 20 consist of the same film or are formed in one piece. The thickness of the surrounding film 20 therefore corresponds to that of the membrane 12.
  • the surrounding film 20 is opened relatively narrowly on one side in relation to the overall width.
  • the channel 18 can thereby be formed.
  • the majority of the membrane 12 can lift freely from the opening 11 or the base film 10. This is ensured by a free area 17 formed by the overlying frame film 13.
  • the free area 17 is designed in such a way that the membrane 12 can safely lift up into this free area 17.
  • the free area 17 of the frame film 13 is made somewhat larger than the membrane 12 and is arranged above the membrane 12.
  • the contour of the surrounding film 20 is at least partially based on the frame film 13.
  • the surrounding film 20 is connected to the frame film 13.
  • the connection of the base film 10 to the frame film 13 and / or the frame film 13 to the cover film 15 is preferably carried out by a welding process.
  • the foils 10, 13, 15 are designed to be weldable.
  • the foils 10, 13, 15 are preferably made of plastic.
  • the valve 8 particularly preferably consists of foils with the same material.
  • Polypropylene is particularly suitable here. Reusability is simplified because of the uniform material of the various foils 10, 13, 15. Plastics made from renewable raw materials or biodegradable plastics can also be used.
  • Base film 10 and / or frame film 13 and / or cover film 15 can for example consist of polypropylene, preferably of OPP (oriented polypropylene), a longitudinally stretched or biaxially stretched polypropylene.
  • the base film 10 and / or frame film 13 and / or cover film can alternatively consist of PET or a composite film such as PP-EVOH-PP.
  • the material for the membrane 12 is characterized by a high oxygen barrier.
  • the membrane 12 consists of PET or a composite material such as PP-EVOH-PP.
  • the alternative exemplary embodiment according to FIG. 3, which also falls under the concept of the invention, is designed as an internal valve 8.
  • the cover film 15 and the channel 18 are absent compared to the exemplary embodiment according to FIG. 1.
  • the other side of the opening 11 is covered by a filter 16, in particular a filter fleece 16.
  • the filter 16 or the fleece is required to prevent particles of the filling material from penetrating into the valve 8 between the membrane 12 and the base film 10, which would impair the function.
  • the membrane 12 is in turn connected to the surrounding film 20 via the connection point 22, so that it is a one-piece design.
  • the following geometries could be particularly suitable for the valve 8.
  • the edge lengths of the base film 10 can be in the range between preferably 12.5 and 20 mm.
  • the thickness of the base film 10 is preferably in the range between 0.1 mm and 0.25 mm, particularly preferably 0.125 mm, for example.
  • the fluid for example silicone oil or fluids based on bio-based materials or renewable raw materials, for example based on palm oil, coconut oil or the like, is applied as a fluid film.
  • the volume of the fluid film is approx. 2-5 ml.
  • the thickness of the membrane 12 is, for example, in a range between 0.025 mm and 0.075 mm, preferably 0.05 mm.
  • the thickness of the frame film 13 is, for example, in the range between 0.1 mm and 0.2 mm.
  • the thickness of the frame film 13 is greater than the thickness of the membrane 12.
  • the thickness of a possible cover film 15 is, for example, in the range from 0.05 mm to 0.15 mm, particularly preferably 0.1 mm. Depending on the application,
  • the choice of material, connection method, etc. can vary the thicknesses accordingly.
  • a film corresponding to the base area of the base film 10 is punched out in such a way that the circular contour of the membrane 12 results.
  • the membrane 12 is connected to the surrounding film 20 at least at one or more points (or at one or more small webs) or connection points 22.
  • the Fier ein and positioning of the membrane 12 can be simplified.
  • the point or points 22 at which the membrane 12 is still connected to the surrounding film 20 is small in relation to the circumferential direction of the membrane 12, so that the membrane 12 remains lifted off in the free areas.
  • connection points 22 can also be provided. These connection points 22 are to be arranged in such a way that the membrane 12 can still be safely lifted off the opening 11.
  • the Fierstell compiler according to Figure 2 serves the Fier ein of a valve 8 according to Figure 1. It is characterized in that each separate film webs for the base film 10, the surrounding film 20 with adhesive membrane 12, the frame film 13 or, if necessary, for the cover film 15 are fed.
  • the individual film strips of the said films 10, 13, 15, 20 generally have an identical width.
  • the base film 10 is provided.
  • the base film 10 can already have openings 11.
  • the openings 11 could be created on site, for example punched. However, the punching in must be made before the lamination process.
  • a fluid or fluid film is applied to the base foil 10, specifically to the points where the membrane 12 will later come to lie, in particular to the area surrounding the opening 11.
  • the fluid film could already be applied to the underside of the membrane 12.
  • the fluid could also be applied later, for example in the applicator that connects the valve to the packaging material.
  • the surrounding film 20 with the membrane 12 connected via the connection point 22 is applied to the base film 10.
  • a corresponding punching process can create the outlines of the membrane 12 and / or punch out the later channel zone 18.
  • the punching process separates the membrane 12 from the surrounding film in such a way that the two are only connected to one another only by the at least one connection point 22.
  • the surrounding film 20 with the membrane 12 connected by the connection point 22 is firmly connected to the base film 10.
  • the connection can preferably be made with a corresponding welded connection.
  • the following welding processes come into consideration, for example: air welding, thermal contact welding, induction, cold welding and ultrasonic welding (possibly also others). Alternatively, however, other connection methods such as gluing etc. are also possible.
  • the frame film 13 is then applied to the surrounding film 20.
  • the free area 17 comes to lie above the membrane 12. This enables the membrane 12 to be lifted off into the free area 17.
  • the free area 17 is punched out of the frame film 13 beforehand.
  • the applied frame film 13 is with the surrounding film 20 connected. As already described, this can preferably be done with a corresponding welded connection. Alternatively, however, other connection methods such as gluing are also possible. It is important that only the surrounding film 20 is connected to the frame film 13, but not the membrane 12. The free mobility of the membrane 12, which is only kept movable via at least one connection point 22, is thereby ensured.
  • the cover film 15 can then be applied to the frame film 13.
  • the cover film 15 is then connected to the frame film 13. As already described, this can preferably be done with a corresponding welded connection. Alternatively, however, other connection methods such as gluing are also possible. This step could also be omitted, for example for internal valves 8 that do not require a cover film 15.
  • valves 8 which are arranged coherently on a film web, can take place in the packaging machine, in particular as described by the applicator. Alternatively, the separation could also take place directly after the foils 10, 13, 15, 20 have been joined together.
  • valves 8 described are used, for example, as aroma protection valves in the packaging of outgassing products such as coffee beans, ground coffee, fresh dough or the like, in which an overpressure arises after packaging in the packaging due to outgassing filling goods.
  • the pressure is reduced by lifting the membrane 12 relative to the opening 11 or the base film 10 and then escaping via the free area 17 or - in the case of an external valve - via at least one lateral channel connected to the free area 17 18, which is formed between the frame film 13 and cover film 15.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Bag Frames (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

The invention relates to a valve for a packaging container, said valve comprising at least one base film (10) having an opening (11), at least one frame film (13) surrounding a free area (17), and at least one membrane (12) arranged on said base film (10) and covering said opening (11). A fluid is provided between said membrane (12) and the base film (10), the membrane (12) being connected to a surrounding film (20) via at least one connection point (22), the surrounding film (20) being connected to the base film (10) on one side and to the frame film (13) on the other side, and the membrane (12) being arranged movably within the free region (17). The surrounding film (20) is open at least at one point, so that a channel (18) is formed.

Description

Beschreibung description
Titel title
Ventil für einen Verpackunasbehälter Valve for a packaging container
Stand der Technik State of the art
Die vorliegende Erfindung betrifft ein Ventil, insbesondere ein Überdruckventil für einen Verpackungsbehälter, nach der Gattung des unabhängigen Anspruchs. The present invention relates to a valve, in particular a pressure relief valve for a packaging container, according to the preamble of the independent claim.
Derartige Ventile kommen in der Verpackungstechnik zum Einsatz, wenn das Füllgut zum Ausgasen neigt wie beispielsweise bei frisch geröstetem Kaffee.Such valves are used in packaging technology when the product tends to outgas, such as freshly roasted coffee.
So ist beispielsweise aus der EP 760790 B1 ein Überdruckventil für einen Verpackungsbehälter mit einer an der Wand des Verpackungsbehälters befestigten Basisplatte bekannt, die ein zentrales, ein Durchgangsloch in der Wand des Verpackungsbehälters überdeckendes Ventilloch aufweist, und mit einer auf der Basisplatte mit zwei parallelen Randzonen befestigten, eine Kanalzone freilassenden Ventilmembran, die das Ventilloch überdeckt und in Schließlage auf der Basisplatte dicht aufliegt. Das Ventilloch ist aus wenigstens zwei sich schneidenden, kreisförmigen Öffnungen ausgebildet. Aus der EP 2396244 B1 ist ein gattungsgemäßes Überdruckventil bekannt, welches einen Grundkörper mit einer zweistufig ausgebildeten Vertiefung und eine Membran umfasst, wobei die Membran eine zu einer Dichtfläche gerichtete, verformbare Oberfläche aufweist. Der Grundkörper ist relativ komplex aufgebaut. Ein weiteres gattungsgemäßes Ventil ist aus der EP 602418 B1 bekannt. Des Weiteren ist aus der WO 2016/072663 A1 bereits ein Ventil für einen Verpackungsbehälter bekannt, das zumindest ein als topfförmiges Kunststoff- oder Metallbauteil ausgebildetes Grundelement mit einer Öffnung, zumindest ein als topfförmiges Kunststoff- oder Metallbauteil ausgebildetes Rahmenelement aufweist, welches einen freien Bereich umgibt und zumindest eine Membran, welche auf dem Grundelement angeordnet ist und die Öffnung überdeckt, umfasst, wobei zwischen der Membran und dem Grundelement ein Fluid vorgesehen ist. Offenbarung der Erfindung For example, EP 760790 B1 discloses a pressure relief valve for a packaging container with a base plate fastened to the wall of the packaging container, which has a central valve hole covering a through hole in the wall of the packaging container, and with one fastened to the base plate with two parallel edge zones , a valve membrane leaving a channel zone free, which covers the valve hole and rests tightly on the base plate in the closed position. The valve hole is formed from at least two intersecting circular openings. From EP 2396244 B1 a generic pressure relief valve is known which comprises a base body with a two-stage recess and a membrane, the membrane having a deformable surface directed towards a sealing surface. The basic body has a relatively complex structure. Another generic valve is known from EP 602418 B1. Furthermore, a valve for a packaging container is already known from WO 2016/072663 A1, which has at least one base element designed as a cup-shaped plastic or metal component with an opening, at least one frame element designed as a cup-shaped plastic or metal component, which surrounds a free area and at least one membrane which is arranged on the base element and covers the opening, a fluid being provided between the membrane and the base element. Disclosure of the invention
Das erfindungsgemäße Ventil für einen Verpackungsbehälter hat demgegenüber den Vorteil, dass das Ventil einfacher und kostengünstiger produziert und appliziert werden kann. Weiterhin zeichnet sich das erfindungsgemäße Verfahren durch deutlich reduzierten Materialeinsatz aus. Der grundsätzliche Aufbau des Ventils kann sowohl außerhalb des Verpackungsbehälters wie auch in einer bestimmten Ausführungsvariante innerhalb am Verpackungsbehälter appliziert werden. Dies wird erfindungsgemäß dadurch möglich, dass die Membran auf einer Grundfolie zumindest teilweise schwimmend bzw. frei beweglich innerhalb des freien Bereichs angeordnet ist. Dadurch, dass die Membran über zumindest eine Verbindungsstelle mit einer umliegenden Folie so verbunden ist, dass die Membran ansonsten frei bewegbar ist, liegt die Membran bei der Herstellung des Ventils bahnförmig vor und kann dadurch besonders einfach durch eine am Stück zusammenhängende Folienbahn in den Aufbau eingebracht werden. Der Herstellerprozess vereinfacht sich weiter. Die Membran ist zudem nicht mehr großflächig am Grundkörper verbunden und wird somit deutlich weniger von äußeren Einflüssen beeinträchtigt wie beispielsweise Verzug. Erfindungsgemäß ist die umliegende Folie zumindest an einer Stelle offen, so dass sich ein Kanal ausbildet. Über diesen lässt sich der Überdruck sicher abbauen. Zugleich kann jedoch die umliegende Folie einteilig ausgebildet sein. Dadurch vereinfacht sich das Handling. Besonders bevorzugt ist die Verbindungsstelle gegenüberliegend zum Kanal angeordnet. Damit kann die Membran besonders gut in Richtung zum Kanal hin abheben zum Abbau des Überdrucks in dem Verpackungsbehälter. Durch den vorgeschlagenen Aufbau von Grundfolie, Rahmenfolie und gegebenenfalls Deckfolie (quasi eine Art Doppel-T-Träger) ergibt sich eine hohe Biegesteifigkeit bei vergleichsweise geringem Materialeinsatz. Weiterhin erlaubt das erfindungsgemäße Ventil, dass die Membran mit einer Vorspannung ausgestattet werden kann, die für die Funktion des Ventils hilfreich sein kann.In contrast, the valve according to the invention for a packaging container has the advantage that the valve can be produced and applied in a simpler and more cost-effective manner. The method according to the invention is also distinguished by a significantly reduced use of material. The basic structure of the valve can be applied both outside the packaging container and, in a certain variant, inside the packaging container. According to the invention, this is possible in that the membrane is arranged on a base film in an at least partially floating or freely movable manner within the free area. Because the membrane is connected to a surrounding film via at least one connection point in such a way that the membrane is otherwise freely movable, the membrane is in the form of a sheet when the valve is manufactured and can therefore be incorporated into the structure particularly easily through a continuous sheet of film will. The manufacturing process is further simplified. In addition, the membrane is no longer connected to the main body over a large area and is therefore significantly less affected by external influences such as warpage. According to the invention, the surrounding film is open at least at one point, so that a channel is formed. The overpressure can be safely reduced via this. At the same time, however, the surrounding film can be made in one piece. This simplifies handling. The connection point is particularly preferably arranged opposite the channel. The membrane can thus lift off particularly well in the direction of the channel in order to reduce the overpressure in the packaging container. The proposed structure of the base film, frame film and optionally cover film (quasi a type of double-T carrier) results in high flexural rigidity with comparatively little use of material. Furthermore, the valve according to the invention allows the membrane to be provided with a preload which can be helpful for the functioning of the valve.
Das Ventil kombiniert die guten Ventileigenschaften eines spritzgegossenen Ventils mit denen eines Folienventils. Es bietet sehr geringe Öffnungs- und Schließdrücke. Aufgebaut wird das Ventil aus mehreren Folienschichten, die beispielsweise auf Rotationsstanzwerkzeugen hergestellt und anschließend aufeinander laminiert werden. Das Fügen erfolgt idealerweise durch eine Schweißverbindung. Alternativ könnte auch ein Haftvermittler wie Klebstoff eingesetzt werden. Das vorgeschlagene Ventil kann bevorzugt aus einer einzelnen Materialsorte hergestellt werden und ist damit leichter rezyklierbar und somit umweltverträglicher sowie auch leicht schweißbarer. In einer zweckmäßigen Weiterbildung besteht die Folie aus Polypropylen. Jedoch auch erneuerbare Materialien wie beispielsweise Kunststoffe aus nachwachsenden Rohstoffen oder biologisch abbaubare Kunststoffe wären möglich. The valve combines the good valve properties of an injection molded valve with those of a film valve. It offers very low opening and closing pressures. The valve is built up from several layers of film, which are produced, for example, on rotary punching tools and then laminated to one another. The joining is ideally done by a welded connection. Alternatively, an adhesion promoter such as an adhesive could also be used. The proposed valve can preferably be made from a single type of material and is therefore easier to recycle and thus more environmentally friendly and also easier to weld. In an expedient development, the film consists of polypropylene. However, renewable materials such as plastics made from renewable raw materials or biodegradable plastics would also be possible.
In einer alternativen, unter den Erfindungsgedanken fallenden Ausgestaltung ist das Ventil frei von dem Kanal ausgebildet. In der alternativen Ausgestaltung umfasst das Ventil für einen Verpackungsbehälter zumindest eine Grundfolie mit einer Öffnung, zumindest eine Rahmenfolie, die einen freien Bereich umgibt, und zumindest eine Membran, die auf der Grundfolie angeordnet ist und die Öffnung überdeckt, wobei zwischen der Membran und der Grundfolie ein Fluid vorgesehen ist, wobei die Membran über zumindest eine Verbindungsstelle mit einer umliegenden Folie verbunden ist, wobei die umliegende Folie auf der einen Seite mit der Grundfolie und auf der anderen Seite mit der Rahmenfolie verbunden ist und die Membran beweglich innerhalb des freien Bereichs angeordnet ist. Dadurch liegt die Membran bei der Fierstellung des Ventils bahnförmig vor und kann dadurch besonders einfach durch eine am Stück zusammenhängende Folienbahn in den Aufbau eingebracht werden. In an alternative embodiment falling under the concept of the invention, the valve is designed free from the channel. In the alternative embodiment, the valve for a packaging container comprises at least one base film with an opening, at least one frame film that surrounds a free area, and at least one membrane that is arranged on the base film and covers the opening, with between the membrane and the base film a fluid is provided, the membrane being connected to a surrounding film via at least one connection point, the surrounding film being connected on one side to the base film and on the other side to the frame film and the membrane being movably arranged within the free area . As a result, the membrane is in the form of a sheet when the valve is in the open position and can therefore be introduced into the structure particularly easily by means of a continuous sheet of film.
In einer zweckmäßigen Weiterbildung ist die umliegende Folie so ausgebildet, dass sie die Membran kreisförmig oder U-förmig zumindest teilweise umgibt. Diese Geometrie stellt eine einfache Anbringung der umliegenden Folie auf der Grundfolie und/oder Rahmenfolie sicher bei Beibehaltung der o.g. Funktionalität. In an expedient development, the surrounding film is designed in such a way that it at least partially surrounds the membrane in a circular or U-shaped manner. This geometry ensures easy attachment of the surrounding film to the base film and / or frame film while maintaining the above-mentioned functionality.
In einer zweckmäßigen Weiterbildung ist die Dicke der Rahmenfolie größer als die Dicke der Membran, vorzugsweise um 75% bis 225 % größer. Damit wird eine hinreichend gute freie Beweglichkeit der Membran in Richtung des freien Bereichs möglich. In an expedient development, the thickness of the frame film is greater than the thickness of the membrane, preferably 75% to 225% greater. This enables the membrane to move freely in the direction of the free area.
In einer zweckmäßigen Weiterbildung besteht die Grundfolie und/oder die Rahmenfolie und/oder die Deckfolie aus Polypropylen, OPP, PET, Polyolefine oder aus Kunststoff, vorzugsweise aus nachwachsenden Rohstoffen oder biologisch abbaubaren Kunststoffen. Dadurch kann die Wiederverwertbarkeit bzw. Umweltverträglichkeit erhöht werden. In an expedient development, the base film and / or the frame film and / or the cover film are made of polypropylene, OPP, PET, polyolefins or plastic, preferably renewable raw materials or biodegradable plastics. As a result, the recyclability or environmental compatibility can be increased.
Bei einem möglichen Verfahren zur Fierstellung des Ventils für einen Verpackungsbehälter wird die umliegende Folie auf der einen Seite mit der Grundfolie und auf der anderen Seite mit der Rahmenfolie verbunden, und die Membran wird beweglich innerhalb des freien Bereichs angeordnet. In one possible method for setting the valve for a packaging container, the surrounding film is on one side with the Base film and on the other side connected to the frame film, and the membrane is movably arranged within the free area.
Insbesondere wird eine Deckfolie auf die Rahmenfolie aufgebracht. In particular, a cover film is applied to the frame film.
In einer zweckmäßigen Weiterbildung wird die Öffnung und/oder der freie Bereich und/oder die Membran ausgestanzt. Diese Schritte können sehr einfach bei den gewählten Folienmaterialien durchgeführt werden, sodass sich die Herstellung weiter vereinfacht. In an expedient development, the opening and / or the free area and / or the membrane is punched out. These steps can be carried out very easily with the selected film materials, so that production is further simplified.
Besonders zweckmäßig wird vor dem Aufbringen der Membran ein Fluid auf die Grundfolie und/oder die Membran aufgebracht. Insbesondere wird vor dem Aufbringen der umliegenden Folie mit verbundener Membran auf der Grundfolie das Fluid zwischen Grundfolie und Membran aufgebracht. Dadurch wird sichergestellt, dass die Membran auch bei den nachfolgenden Produktionsstätten sicher mit der Grundfolie verbunden ist. Alternativ kann das Fluid auch erst im Applikator, der das Ventil mit dem Verpackungsmaterial verbindet, aufgebracht werden. Before the membrane is applied, a fluid is particularly expediently applied to the base film and / or the membrane. In particular, the fluid between the base film and the membrane is applied to the base film before the surrounding film with the connected membrane is applied. This ensures that the membrane is securely connected to the base film also in the subsequent production sites. Alternatively, the fluid can only be applied in the applicator that connects the valve to the packaging material.
In einer zweckmäßigen Weiterbildung werden Grundfolie und/oder umliegende Folie und/oder Rahmenfolie und/oder Deckfolie über eine Schweißverbindung verbunden, insbesondere laminiert. Dadurch kann im Herstellprozess aufgrund erhöhter Reinigungsanforderungen auf unerwünschten Klebstoff verzichtet werden, der zudem teuer ist. Bei einem innenliegenden Ventil wird so vermieden, dass sich Klebstoff auf der dem Produkt zugewandten Seite befindet. In an expedient development, the base film and / or surrounding film and / or frame film and / or cover film are connected, in particular laminated, via a welded connection. As a result, undesirable adhesive, which is also expensive, can be dispensed with in the manufacturing process due to increased cleaning requirements. In the case of an internal valve, this prevents glue from being on the side facing the product.
Sowohl die Herstellung der Öffnung wie auch die Herstellung des freien Bereichs kann in ein und demselben Schritt mit nur einem Stanzwerkzeug vorgenommen werden. Dies vereinfacht die Herstellung weiter. Durch das Einbringen der Membran in Verbindung mit der umliegenden Folie kann eine hohe Positionsgenauigkeit erreicht werden. Both the production of the opening and the production of the free area can be carried out in one and the same step with just one punching tool. This further simplifies production. By inserting the membrane in connection with the surrounding film, a high level of positional accuracy can be achieved.
Weitere zweckmäßige Weiterbildungen ergeben sich aus weiteren abhängigen Ansprüchen und aus der Beschreibung. Kurzbeschreibung der Figuren Further useful developments result from further dependent claims and from the description. Brief description of the figures
Unter Bezugnahme auf die beigefügten Figuren werden Ausführungsformen der Erfindung im Detail beschrieben. Es zeigen: Embodiments of the invention are described in detail with reference to the accompanying figures. Show it:
Figur 1 ein Ausführungsbeispiel eines außenliegenden Ventils, bei dem die Membran mit der umliegenden Folie teilweise verbunden ist, Figure 1 shows an embodiment of an external valve in which the membrane is partially connected to the surrounding film,
Figur 2 ein Fierstellerverfahren für das Ventil gemäß Figur 1 , bei dem ebenfalls einzelne Folienbahnen gestanzt und geschweißt werden sowie FIG. 2 shows a Fiersteller method for the valve according to FIG. 1, in which individual film webs are also punched and welded
Figur 3 ein Ausführungsbeispiel eines innenliegenden Ventils, bei dem die Membran mit der umliegenden Folie teilweise verbunden ist. Figure 3 shows an embodiment of an internal valve in which the membrane is partially connected to the surrounding film.
Bevorzugte Ausführungsformen der Erfindung Preferred embodiments of the invention
Nachfolgend werden unter Bezugnahme auf die Figuren die Ausführungsbeispiele der Erfindung im Detail beschrieben. The exemplary embodiments of the invention are described in detail below with reference to the figures.
Figur 1 zeigt ein Ausführungsbeispiel des Ventils 8. Das Ventil 8 umfasst eine Grundfolie 10, mit zumindest einer Öffnung 11. Die Öffnung 11 weist beispielsweise die Geometrie von zwei sich schneidenden Kreisen auf. Die Membran 12 ist mit mindestens einem insbesondere schmalen Verbindungsbereich 22 mit einer umliegenden Folie 20 noch verbunden ist. Der überwiegende Teil der Membran 12 ist jedoch immer noch frei beweglich. Membran 12, Verbindungsbereich 22 und umliegende Folie 20 bestehen somit aus einem einzigen Teil. Die umliegende Folie 20 umschließt die Membran 12 bis auf einen kleinen Kanal 18. An einem mittleren Schenkel der umliegenden Folie 20 ist die zumindest eine die Verbindungsstelle 22 zwischen der umliegenden Folie 20 und der Membran 22 ausgebildet. Membran 22 und umliegende Folie 20 bestehen aus derselben Folie bzw. sind einteilig ausgebildet. Daher entspricht die Dicke der umliegenden Folie 20 derjenigen der Membran 12. Im Ausführungsbeispiel ist die umliegende Folie 20 auf einer Seite relativ schmal bezogen die Gesamtbreite geöffnet. Dadurch kann sich der Kanal 18 ausbilden. Der Großteil der Membran 12 kann frei von der Öffnung 11 bzw. der Grundfolie 10 abheben. Dies wird sichergestellt durch einen von der darüber liegenden Rahmenfolie 13 gebildeten freien Bereich 17. Der freie Bereich 17 ist so gestaltet, dass die Membran 12 sicher nach oben in diesen freien Bereich 17 hinein abheben kann. Hierzu ist der freie Bereich 17 der Rahmenfolie 13 etwas größer als die Membran 12 ausgebildet und oberhalb der Membran 12 angeordnet. Die Kontur der umliegenden Folie 20 orientiert sich zumindest teilweise an der Rahmenfolie 13. Die umliegende Folie 20 ist mit der Rahmenfolie 13 verbunden. FIG. 1 shows an exemplary embodiment of the valve 8. The valve 8 comprises a base film 10 with at least one opening 11. The opening 11 has, for example, the geometry of two intersecting circles. The membrane 12 is still connected to a surrounding film 20 with at least one, in particular narrow, connecting region 22. However, the majority of the membrane 12 is still freely movable. Membrane 12, connecting area 22 and surrounding film 20 thus consist of a single part. The surrounding film 20 encloses the membrane 12 except for a small channel 18. The at least one connecting point 22 between the surrounding film 20 and the membrane 22 is formed on a middle leg of the surrounding film 20. The membrane 22 and the surrounding film 20 consist of the same film or are formed in one piece. The thickness of the surrounding film 20 therefore corresponds to that of the membrane 12. In the exemplary embodiment, the surrounding film 20 is opened relatively narrowly on one side in relation to the overall width. The channel 18 can thereby be formed. The majority of the membrane 12 can lift freely from the opening 11 or the base film 10. This is ensured by a free area 17 formed by the overlying frame film 13. The free area 17 is designed in such a way that the membrane 12 can safely lift up into this free area 17. For this purpose, the free area 17 of the frame film 13 is made somewhat larger than the membrane 12 and is arranged above the membrane 12. The contour of the surrounding film 20 is at least partially based on the frame film 13. The surrounding film 20 is connected to the frame film 13.
Die Verbindung der Grundfolie 10 mit der Rahmenfolie 13 und/oder der Rahmenfolie 13 mit der Deckfolie 15 erfolgt bevorzugt durch ein Schweißverfahren. Die Folien 10, 13, 15 sind schweißbar ausgebildet. Die Folien 10, 13, 15 bestehen bevorzugt aus Kunststoff. Besonders bevorzugt besteht das Ventil 8 aus Folien mit demselben Material. Besonders eignet sich hierbei Polypropylen. Aufgrund des einheitlichen Materials der verschiedenen Folien 10,13, 15 vereinfacht sich die Wiederverwendbarkeit. Auch Kunststoffe aus nachwachsenden Rohstoffen oder biologisch abbaubare Kunststoffe können zum Einsatz kommen. Grundfolie 10 und/oder Rahmenfolie 13 und/oder Deckfolie 15 können beispielsweise aus Polypropylen bestehen, bevorzugt aus OPP (oriented polypropylene), einem längsverstreckten oder biaxial verstreckten Polypropylen. Grundfolie 10 und/oder Rahmenfolie 13 und/oder Deckfolie können alternativ aus PET oder einer Verbundfolie wie beispielsweise PP-EVOH-PP bestehen. Das Material für die Membran 12 zeichnet sich durch eine hohe Sauerstoffbarriere aus. Beispielsweise besteht die Membran 12 aus PET oder einem Verbundmaterial wie PP-EVOH-PP. The connection of the base film 10 to the frame film 13 and / or the frame film 13 to the cover film 15 is preferably carried out by a welding process. The foils 10, 13, 15 are designed to be weldable. The foils 10, 13, 15 are preferably made of plastic. The valve 8 particularly preferably consists of foils with the same material. Polypropylene is particularly suitable here. Reusability is simplified because of the uniform material of the various foils 10, 13, 15. Plastics made from renewable raw materials or biodegradable plastics can also be used. Base film 10 and / or frame film 13 and / or cover film 15 can for example consist of polypropylene, preferably of OPP (oriented polypropylene), a longitudinally stretched or biaxially stretched polypropylene. The base film 10 and / or frame film 13 and / or cover film can alternatively consist of PET or a composite film such as PP-EVOH-PP. The material for the membrane 12 is characterized by a high oxygen barrier. For example, the membrane 12 consists of PET or a composite material such as PP-EVOH-PP.
Das alternative, ebenfalls unter den Erfindungsgedanken fallende Ausführungsbeispiel gemäß Figur 3 ist als innenliegendes Ventil 8 ausgeführt. Zum einen fehlt gegenüber dem Ausführungsbeispiel nach Figur 1 die Deckfolie 15 sowie der Kanal 18. Die andere Seite der Öffnung 11 wird durch ein Filter 16, insbesondere ein Filtervlies 16 überdeckt. Der Filter 16 bzw. das Vlies wird benötigt, um zu verhindern, dass Partikel des Füllguts in das Ventil 8 zwischen Membran 12 und Grundfolie 10 eindringen können, wodurch die Funktion beeinträchtigt würde. Insbesondere jedoch ist wiederum die Membran 12 über die Verbindungsstelle 22 mit der umliegenden Folie 20 verbunden, sodass es sich um eine einteilige Ausführung handelt. Nachfolgende Geometrien könnten sich für das Ventil 8 besonders eignen. Bei den Ausführungsbeispielen gemäß Figur 1 bzw. 3 können die Kantenlängen der Grundfolie 10 im Bereich zwischen bevorzugt 12,5 und 20 mm liegen. Die Dicke der Grundfolie 10 bewegt sich bevorzugt im Bereich von 0,1 mm und 0,25 mm, besonders bevorzugt beispielsweise 0,125 mm. Das Fluid, beispielsweise Silikonöl oder Fluide auf Basis von bio-basierten Materialien bzw. nachwachsenden Rohstoffen, beispielsweise auf Basis von Palmöl, Kokosöl oder Ähnliches, wird als Fluidfilm aufgetragen. Das Volumen des Fluidfilms beträgt ca. 2-5 mI. Die Dicke der Membran 12 liegt beispielsweise in einem Bereich zwischen 0,025 mm bis 0,075 mm, bevorzugt bei 0,05 mm. Die Dicke der Rahmenfolie 13 liegt beispielsweise im Bereich zwischen 0,1 mm und 0,2 mm. Die Dicke der Rahmenfolie 13 ist größer als die Dicke der Membran 12. Die Dicke einer möglichen Deckfolie 15 liegt beispielsweise im Bereich von 0,05 mm bis 0,15 mm, besonders bevorzugt bei 0,1 mm. Je nach Anwendungsfall,The alternative exemplary embodiment according to FIG. 3, which also falls under the concept of the invention, is designed as an internal valve 8. On the one hand, the cover film 15 and the channel 18 are absent compared to the exemplary embodiment according to FIG. 1. The other side of the opening 11 is covered by a filter 16, in particular a filter fleece 16. The filter 16 or the fleece is required to prevent particles of the filling material from penetrating into the valve 8 between the membrane 12 and the base film 10, which would impair the function. In particular, however, the membrane 12 is in turn connected to the surrounding film 20 via the connection point 22, so that it is a one-piece design. The following geometries could be particularly suitable for the valve 8. In the exemplary embodiments according to FIGS. 1 and 3, the edge lengths of the base film 10 can be in the range between preferably 12.5 and 20 mm. The thickness of the base film 10 is preferably in the range between 0.1 mm and 0.25 mm, particularly preferably 0.125 mm, for example. The fluid, for example silicone oil or fluids based on bio-based materials or renewable raw materials, for example based on palm oil, coconut oil or the like, is applied as a fluid film. The volume of the fluid film is approx. 2-5 ml. The thickness of the membrane 12 is, for example, in a range between 0.025 mm and 0.075 mm, preferably 0.05 mm. The thickness of the frame film 13 is, for example, in the range between 0.1 mm and 0.2 mm. The thickness of the frame film 13 is greater than the thickness of the membrane 12. The thickness of a possible cover film 15 is, for example, in the range from 0.05 mm to 0.15 mm, particularly preferably 0.1 mm. Depending on the application,
Materialauswahl, Verbindungsverfahren etc. können die Dicken entsprechend variieren. The choice of material, connection method, etc. can vary the thicknesses accordingly.
Zur Fierstellung der Membran 12 wird beispielsweise eine der Grundfläche der Grundfolie 10 entsprechende Folie so ausgestanzt, dass sich die kreisförmige Kontur der Membran 12 ergibt. Für den Fierstellungsprozess ist es vorteilhaft, wenn die Membran 12 zumindest an einem oder mehreren Punkten (bzw. an einem oder mehreren kleinen Stegen) bzw. Verbindungsstellen 22 mit der umliegenden Folie 20 verbunden ist. Die Fierstellung und Positionierung der Membran 12 kann dadurch vereinfacht werden. Die Stelle bzw. Stellen 22, an denen die Membran 12 noch mit der umliegenden Folie 20 verbunden ist, ist bezogen auf die Umfangsrichtung der Membran 12 klein, so dass ein Abheben der Membran 12 in den freien Bereichen sichergestellt bleibt. To position the membrane 12, for example, a film corresponding to the base area of the base film 10 is punched out in such a way that the circular contour of the membrane 12 results. For the fastening process, it is advantageous if the membrane 12 is connected to the surrounding film 20 at least at one or more points (or at one or more small webs) or connection points 22. The Fierstellung and positioning of the membrane 12 can be simplified. The point or points 22 at which the membrane 12 is still connected to the surrounding film 20 is small in relation to the circumferential direction of the membrane 12, so that the membrane 12 remains lifted off in the free areas.
Jedoch auch mehrere Verbindungsstellen 22 können vorgesehen sein. Diese Verbindungsstellen 22 sind so anzuordnen, dass weiterhin ein Abheben der Membran 12 von der Öffnung 11 sicher möglich ist. However, several connection points 22 can also be provided. These connection points 22 are to be arranged in such a way that the membrane 12 can still be safely lifted off the opening 11.
Das Fierstellverfahren gemäß Figur 2 dient der Fierstellung eines Ventils 8 gemäß Figur 1. Es zeichnet sich dadurch aus, dass jeweils separate Folienbahnen für die Grundfolie 10, die umliegenden Folie 20 mit anhaftender Membran 12, die Rahmenfolie 13 bzw. gegebenenfalls für die Deckfolie 15 zugeführt werden. Die einzelnen Folienstreifen der genannten Folien 10, 13, 15, 20 besitzen in der Regel eine identische Breite. The Fierstellverfahren according to Figure 2 serves the Fierstellung of a valve 8 according to Figure 1. It is characterized in that each separate film webs for the base film 10, the surrounding film 20 with adhesive membrane 12, the frame film 13 or, if necessary, for the cover film 15 are fed. The individual film strips of the said films 10, 13, 15, 20 generally have an identical width.
Zunächst wird die Grundfolie 10 bereitgestellt. Die Grundfolie 10 kann bereits Öffnungen 11 aufweisen. Alternativ könnten die Öffnungen 11 vor Ort erstellt, beispielsweise gestanzt werden. Die Ausstanzung in sind jedoch vor dem Laminationsprozess vorzunehmen. First, the base film 10 is provided. The base film 10 can already have openings 11. Alternatively, the openings 11 could be created on site, for example punched. However, the punching in must be made before the lamination process.
In einem weiteren Schritt wird ein Fluid bzw. Fluidfilm auf die Grundfolie 10 aufgebracht, und zwar auf die Stellen, wo später die Membran 12 zu liegen kommt, insbesondere auf den die Öffnung 11 umgebenden Bereich. Alternativ könnte der Fluidfilm bereits auf der Unterseite der Membran 12 appliziert werden. Alternativ könnte das Fluid auch später aufgebracht werden, beispielsweise im Applikator, der das Ventil mit dem Verpackungsmaterial verbindet. In a further step, a fluid or fluid film is applied to the base foil 10, specifically to the points where the membrane 12 will later come to lie, in particular to the area surrounding the opening 11. Alternatively, the fluid film could already be applied to the underside of the membrane 12. Alternatively, the fluid could also be applied later, for example in the applicator that connects the valve to the packaging material.
In einem weiteren Schritt wird die umliegende Folie 20 mit über die Verbindungsstelle 22 verbundener Membran 12 auf die Grundfolie 10 aufgebracht. Zur Fierstellung der umliegenden Folie 20 mit über die Verbindungsstelle 22 verbundener Membran 12 und/oder zumindest einen Kanal 18 kann ein entsprechender Stanzvorgang die Umrisse der Membran 12 erstellen und/oder die spätere Kanalzone 18 ausstanzen. Durch den Stanzvorgang wird die Membran 12 von der umliegenden Folie so getrennt, dass beide lediglich nur noch durch die zumindest eine Verbindungsstelle 22 miteinander verbunden sind. Die umliegende Folie 20 mit der durch die Verbindungsstelle 22 verbundenen Membran 12 wird mit der Grundfolie 10 fest verbunden. Die Verbindung kann wie bereits beschrieben bevorzugt mit einer entsprechenden Schweißverbindung erfolgen. Als Schweißverfahren kommen beispielsweise in Betracht: Fleißluft-Schweißen-, Wärmekontakt-Schweißen, Induktion, Kaltverschweißung und Ultraschallschweißen (eventuell auch andere). Alternativ werden jedoch auch sonstige Verbindungsverfahren wie Kleben etc. möglich. In a further step, the surrounding film 20 with the membrane 12 connected via the connection point 22 is applied to the base film 10. To position the surrounding film 20 with the membrane 12 connected via the connection point 22 and / or at least one channel 18, a corresponding punching process can create the outlines of the membrane 12 and / or punch out the later channel zone 18. The punching process separates the membrane 12 from the surrounding film in such a way that the two are only connected to one another only by the at least one connection point 22. The surrounding film 20 with the membrane 12 connected by the connection point 22 is firmly connected to the base film 10. As already described, the connection can preferably be made with a corresponding welded connection. The following welding processes come into consideration, for example: air welding, thermal contact welding, induction, cold welding and ultrasonic welding (possibly also others). Alternatively, however, other connection methods such as gluing etc. are also possible.
Anschließend wird die Rahmenfolie 13 auf der umliegenden Folie 20 aufgebracht. Dabei kommt der freie Bereich 17 oberhalb der Membran 12 zu liegen. Dadurch wird ein Abheben der Membran 12 in den freien Bereich 17 hinein möglich. Zuvor wird der freie Bereich 17 aus der Rahmenfolie 13 ausgestanzt. Die aufgebrachte Rahmenfolie 13 wird mit der umliegenden Folie 20 verbunden. Dies kann wie bereits beschrieben bevorzugt mit einer entsprechenden Schweißverbindung erfolgen. Alternativ werden jedoch auch sonstige Verbindungsverfahren wie Kleben möglich. Wichtig ist, dass lediglich die umliegende Folie 20 mit der Rahmenfolie 13 verbunden wird, nicht jedoch die Membran 12. Die freie Beweglichkeit der Membran 12, die lediglich über zumindest eine Verbindungsstelle 22 beweglich gehalten ist, wird dadurch sichergestellt. The frame film 13 is then applied to the surrounding film 20. The free area 17 comes to lie above the membrane 12. This enables the membrane 12 to be lifted off into the free area 17. The free area 17 is punched out of the frame film 13 beforehand. The applied frame film 13 is with the surrounding film 20 connected. As already described, this can preferably be done with a corresponding welded connection. Alternatively, however, other connection methods such as gluing are also possible. It is important that only the surrounding film 20 is connected to the frame film 13, but not the membrane 12. The free mobility of the membrane 12, which is only kept movable via at least one connection point 22, is thereby ensured.
Anschließend kann die Deckfolie 15 auf die Rahmenfolie 13 aufgebracht werden. Anschließend wird die Deckfolie 15 mit der Rahmenfolie 13 verbunden. Dies kann wie bereits beschrieben bevorzugt mit einer entsprechenden Schweißverbindung erfolgen. Alternativ werden jedoch auch sonstige Verbindungsverfahren wie Kleben möglich. Beispielsweise für innenliegende Ventile 8, die ohne Deckfolie 15 auskommen, könnte dieser Schritt auch entfallen. The cover film 15 can then be applied to the frame film 13. The cover film 15 is then connected to the frame film 13. As already described, this can preferably be done with a corresponding welded connection. Alternatively, however, other connection methods such as gluing are also possible. This step could also be omitted, for example for internal valves 8 that do not require a cover film 15.
Das Vereinzeln der Ventile 8, die auf einer Folienbahn zusammenhängend angeordnet sind, kann in der Verpackungsmaschine, insbesondere durch den Applikator beschrieben erfolgen. Alternativ könnte die Vereinzelung auch direkt nach dem Zusammenfügen der Folien 10, 13, 15, 20 erfolgen. The isolation of the valves 8, which are arranged coherently on a film web, can take place in the packaging machine, in particular as described by the applicator. Alternatively, the separation could also take place directly after the foils 10, 13, 15, 20 have been joined together.
Die beschriebenen Ventile 8 werden beispielsweise als Aromaschutzventile bei Verpackungen von ausgasenden Produkten wie beispielsweise Kaffeebohnen, Mahlkaffee, Frischteig oder Ähnliches verwendet, bei denen ein Überdruck nach dem Abpacken in der Verpackung durch ausgasende Füllgüter entsteht. Ein Druckabbau erfolgt durch ein Anheben der Membran 12 relativ zu der Öffnung 11 bzw. der Grundfolie 10 und anschließendes Entweichen über den freien Bereich 17 bzw. - im Falle von einem außenliegenden Ventil - über zumindest einen mit dem freien Bereich 17 in Verbindung stehenden seitlichen Kanal 18, der zwischen Rahmenfolie 13 und Deckfolie 15 ausgebildet ist. The valves 8 described are used, for example, as aroma protection valves in the packaging of outgassing products such as coffee beans, ground coffee, fresh dough or the like, in which an overpressure arises after packaging in the packaging due to outgassing filling goods. The pressure is reduced by lifting the membrane 12 relative to the opening 11 or the base film 10 and then escaping via the free area 17 or - in the case of an external valve - via at least one lateral channel connected to the free area 17 18, which is formed between the frame film 13 and cover film 15.

Claims

Ansprüche Expectations
1. Ventil für einen Verpackungsbehälter, umfassend zumindest eine Grundfolie (10) mit einer Öffnung (11), zumindest eine Rahmenfolie (13), die einen freien Bereich (17) umgibt, und zumindest eine Membran (12), die auf der Grundfolie (10) angeordnet ist und die Öffnung (11 ) überdeckt, wobei zwischen der Membran (12) und der Grundfolie (10) ein Fluid vorgesehen ist, dadurch gekennzeichnet, dass die Membran (12) über zumindest eine Verbindungsstelle (22) mit einer umliegenden Folie (20) verbunden ist, wobei die umliegende Folie (20) auf der einen Seite mit der Grundfolie (10) und auf der anderen Seite mit der Rahmenfolie (13) verbunden ist, und die Membran (12) beweglich innerhalb des freien Bereichs (17) angeordnet ist, wobei die umliegende Folie (20) zumindest an einer Stelle offen ist, sodass sich ein Kanal (18) ausbildet. 1. Valve for a packaging container, comprising at least one base film (10) with an opening (11), at least one frame film (13) which surrounds a free area (17), and at least one membrane (12) which is placed on the base film ( 10) is arranged and covers the opening (11), a fluid being provided between the membrane (12) and the base film (10), characterized in that the membrane (12) has at least one connection point (22) with a surrounding film (20), the surrounding film (20) being connected on one side to the base film (10) and on the other side to the frame film (13), and the membrane (12) being movable within the free area (17 ) is arranged, the surrounding film (20) being open at least at one point, so that a channel (18) is formed.
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die Verbindungsstelle (22) gegenüberliegend zu dem Kanal (18) angeordnet ist. 2. Device according to claim 1, characterized in that the connection point (22) is arranged opposite to the channel (18).
3. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die umliegende Folie (20) die Membran (12) kreisförmig oder U-förmig zumindest teilweise umgibt. 3. Device according to one of the preceding claims, characterized in that the surrounding film (20) at least partially surrounds the membrane (12) in a circular or U-shaped manner.
4. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Membran (12) kreisförmig gebildet ist. 4. Device according to one of the preceding claims, characterized in that the membrane (12) is circular.
5. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Grundfolie (10), die Rahmenfolie (13) und die Membran (12) innerhalb eines Verpackungsbehälters oder außerhalb eines Verpackungsbehälters gleichermaßen verwendbar bzw. anordenbar sind. 5. Device according to one of the preceding claims, characterized in that the base film (10), the frame film (13) and the membrane (12) can be used or arranged equally within a packaging container or outside a packaging container.
6. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Dicke der Rahmenfolie (13) größer ist als die Dicke der Membran (12), vorzugsweise um 75% bis 225 % größer. 6. Device according to one of the preceding claims, characterized in that the thickness of the frame film (13) is greater than the thickness of the membrane (12), preferably 75% to 225% greater.
7. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zumindest eine Deckfolie (15) vorgesehen ist, die mit der Rahmenfolie (13) verbunden ist. 7. Device according to one of the preceding claims, characterized in that at least one cover film (15) is provided which is connected to the frame film (13).
8. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass Grundfolie (10) und/oder Rahmenfolie (13) und/oder Deckfolie (15) aus Polypropylen, PP-EVOH-PP, OPP, PET, Polyolefine oder aus Kunststoff, vorzugsweise aus nachwachsenden Rohstoffen oder biologisch abbaubaren Kunststoffen, besteht. 8. Device according to one of the preceding claims, characterized in that the base film (10) and / or frame film (13) and / or cover film (15) made of polypropylene, PP-EVOH-PP, OPP, PET, polyolefins or plastic, preferably made of renewable raw materials or biodegradable plastics.
9. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Rahmenfolie (13) mit der Grundfolie (10) und/oder der Deckfolie (15) über eine Schweißverbindung verbunden ist, insbesondere laminiert ist. 9. Device according to one of the preceding claims, characterized in that the frame film (13) is connected to the base film (10) and / or the cover film (15) via a welded connection, in particular is laminated.
EP20776108.1A 2019-09-19 2020-09-18 Valve for a packaging container Active EP4031460B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019214317.2A DE102019214317A1 (en) 2019-09-19 2019-09-19 Valve for a packaging container and method for its manufacture
PCT/EP2020/076115 WO2021053150A1 (en) 2019-09-19 2020-09-18 Valve for a packaging container

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EP4031460A1 true EP4031460A1 (en) 2022-07-27
EP4031460B1 EP4031460B1 (en) 2023-12-27

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US (1) US11939133B2 (en)
EP (1) EP4031460B1 (en)
JP (1) JP7255023B2 (en)
DE (1) DE102019214317A1 (en)
WO (1) WO2021053150A1 (en)

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DE102022117642A1 (en) 2022-07-14 2024-01-25 Syntegon Technology Gmbh Method for producing at least one aroma protection valve and aroma protection valve

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DE102019214317A1 (en) 2021-03-25
EP4031460B1 (en) 2023-12-27
US20220332490A1 (en) 2022-10-20
US11939133B2 (en) 2024-03-26
WO2021053150A1 (en) 2021-03-25
JP2022550276A (en) 2022-12-01
JP7255023B2 (en) 2023-04-10

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