EP2186742B1 - Film packaging bag, especially for powdery, dusty filling goods - Google Patents

Film packaging bag, especially for powdery, dusty filling goods Download PDF

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Publication number
EP2186742B1
EP2186742B1 EP08019911A EP08019911A EP2186742B1 EP 2186742 B1 EP2186742 B1 EP 2186742B1 EP 08019911 A EP08019911 A EP 08019911A EP 08019911 A EP08019911 A EP 08019911A EP 2186742 B1 EP2186742 B1 EP 2186742B1
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EP
European Patent Office
Prior art keywords
film
bag
ventilation
longitudinal
packaging bag
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.)
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Application number
EP08019911A
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German (de)
French (fr)
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EP2186742A1 (en
Inventor
Jens Kösters
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Nordenia Deutschland Halle GmbH
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Nordenia Deutschland Halle GmbH
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Publication date
Application filed by Nordenia Deutschland Halle GmbH filed Critical Nordenia Deutschland Halle GmbH
Priority to AT08019911T priority Critical patent/ATE495115T1/en
Priority to EP08019911A priority patent/EP2186742B1/en
Priority to ES08019911T priority patent/ES2354759T3/en
Priority to PL08019911T priority patent/PL2186742T3/en
Priority to DE502008002330T priority patent/DE502008002330D1/en
Publication of EP2186742A1 publication Critical patent/EP2186742A1/en
Application granted granted Critical
Publication of EP2186742B1 publication Critical patent/EP2186742B1/en
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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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/01—Ventilation or drainage of bags

Definitions

  • the invention relates to a film packaging bag, in particular for powdery, dusty filling material, with two opposite, formed by a bag film and bounded by longitudinal edges front surfaces and at least one ventilation device having a longitudinally extending ventilation duct, wherein the ventilation device arranged in the region of one of the longitudinal edges which is designed as a folded edge, wherein the ventilation duct is bounded by the folded edge and a longitudinal sealing seam which separates the ventilation duct from a bag-inside filling space, and wherein an interruption of the longitudinal sealing seam forms an inlet opening into the filling space, to which an outside outlet opening forms, to which an outside outlet opening of the ventilation duct is arranged offset.
  • the ventilation device can be provided depending on the application for a vent, ventilation or combined ventilation.
  • a permanent venting is provided to permanently prevent swelling of the foil packaging bags. It should be taken into account that, in particular in the case of chemical products such as gypsum, cement, tile adhesive or the like, gaseous substances can also be formed during storage, which could also lead to bursting of the film packaging bag if ventilation is insufficient.
  • a film packaging bag with the features described above is known from DE 20 2008 008 303 U1 known.
  • the film packaging bag in the form of a gusseted bag, starting from its folded edges, has inwardly offset longitudinal sealing seams, so that hollow channels are formed between the longitudinal sealing seams and the respective associated folding edge extend over the entire height of the foil pouch.
  • the longitudinal sealing seams each have an interruption. Characterized in that the longitudinal sealing seams are offset from the fold edge on the entire bag length inside, the film from which the bag is formed, spread in the region of the continuous hollow channels, whereby the appearance of the bag is impaired.
  • the ventilation channels will be impaired due to mechanical stress in their function. Due to the low stability of the ventilation ducts themselves, they can be squeezed off, for example, by pressure, in which case there is no adequate ventilation. Furthermore, there is also the increased risk that, during handling of the film packaging bag, the folded edges in the region of the continuous hollow channels tear at sharp edges or pointed objects, so that then an uncontrolled ventilation takes place.
  • a foil packaging bag with a longitudinal ventilation duct is out of EP 0 768 245 A1 Known, wherein edges of the bag film overlap on one of the two front surfaces and are connected there with two parallel longitudinal sealing seams.
  • One of the longitudinal sealing seams has an interruption, which opens into a filling space of the bag and forms an inlet opening of a ventilation channel formed between the two sealing seams, wherein at least one outlet opening of the ventilation channel offset in the longitudinal direction by an outside opening in the bag film or an interruption in the other sealing seam is formed.
  • the ventilation channel is arranged in a central region of one of the front surfaces, there is also an increased risk that the inlet opening becomes clogged with the filling material and then safe ventilation can no longer be guaranteed.
  • the described bag film must be heat-sealable both on the inside and on the outside. Due to its bulbous shape designed as a simple tubular bag foil packaging bag can be stacked or placed poorly.
  • the invention has for its object to provide a permanently ventilated film packaging bag, which is suitable for powdery and dusty contents, has a high quality appearance and has increased reliability of the ventilation device.
  • the at least one ventilation channel extends over part of the length of the associated longitudinal sealing seam, the section of the longitudinal sealing seam laterally delimiting the ventilation channel preferably having a smaller thickness than a section adjoining the outlet opening of the ventilation channel.
  • the ventilation duct is also limited to the filling space of the film packaging bag by a narrow web of the longitudinal sealing seam.
  • the at least one venting channel can be optimally integrated into the associated longitudinal edge. In particular, the stability of the longitudinal edge and the visual appearance are virtually unaffected.
  • the integrated into a portion of the longitudinal edge ventilation duct is additionally protected in a particularly advantageous manner from kinking or damage.
  • a plurality of longitudinally spaced apart from one another and independent of each other at the longitudinal edges of the film packaging bag formed as folding edges Ventilation channels are formed.
  • it is provided to form the ventilation channel on the side of the film packaging bag in the region of the folded edge, for which purpose only a single longitudinal sealing seam has to be produced.
  • the stability of the foil packaging bag can be increased by the lateral longitudinal sealing seam.
  • the assignment of the terms inlet opening and outlet opening primarily serves to distinguish and only corresponds to the actual flow direction in the case of a gas exchange in the event of a venting out of the bag.
  • dusty filling material for example, building materials such as cement, gypsum or tile adhesive or powdered products of the chemical or food industry, this is not yet sealed at its top or bottom. After a closure of the bag, preferably by a transverse sealing seam, ensures the ventilation duct permanent ventilation.
  • the film packaging bag is preferably formed by folding and sealing from the bag film, wherein edges of the bag film can be connected to a longitudinal edge on which no ventilation device is provided by means of a continuous longitudinal seam. Since the inner surfaces of the bag film can be placed directly on top of each other, the outer layer does not have to be heat-sealable in the case of a multilayer configuration of the bag film.
  • the film packaging bag is designed as a side-fold bag with side folds arranged between the front surfaces, wherein the then four longitudinal edges are each formed between one of the side folds on the one hand and one of the front faces on the other hand. If, as described above, it is also provided in such an embodiment to connect the edges of the bag film to one another at one of the four longitudinal edges with a continuous longitudinal seam, the other three longitudinal edges are formed as folded edges and are expediently provided with longitudinal sealing seams.
  • a side gusset bag thus formed is characterized by a very good stability and can also be stored standing when forming a standing floor. In addition, a cuboid shape results, so that a plurality of foil packaging bags can be easily and space-saving stored and also stacked.
  • ventilation channels can be provided at several of the longitudinal edges formed as folding edges, without the production cost is substantially increased. Even if the inlet opening of a ventilation duct is clogged, safe ventilation and / or ventilation can be ensured by the further ventilation ducts and, for example, swelling of the foil packaging bag can be avoided.
  • the outside outlet openings formed in the bag film can be formed, for example, by punches or cuts.
  • venting device is provided for venting
  • the formation of outlet openings is preferred by means of incisions, which cut through both layers of the bag film which are superimposed on the associated folding edge.
  • Appropriate Notches can be produced in a particularly simple manner with knives in the production of the film packaging bag. If only cuts are provided, there is also the advantage that a certain valve function is achieved.
  • the invention is based on the finding that a high pressure in the bag and inflation should be avoided by the ventilation, but on the one hand, an excessive entry of ambient air, moisture or steam should be avoided and on the other hand, a slight overpressure, not to a excessive inflation of the bag, can be tolerated and even be beneficial in terms of the entry of undesirable substances during storage. It is also essential that a labyrinth seal is achieved through the ventilation duct with the entry and exit openings offset in the longitudinal direction. Punches are particularly advantageous when the ventilation device is provided for controlled ventilation. Controlled ventilation may be provided for food, for example.
  • each of the ventilation ducts has an inlet opening and an outlet opening, wherein the ventilation duct is L-shaped.
  • Conceivable are embodiments in which two spaced-apart outlet openings are provided with an inlet opening arranged therebetween in a T-shaped arrangement.
  • a C-shaped configuration results when an outlet opening is provided between two staggered inlet openings.
  • the above-described ventilation according to the invention is intended to allow a pressure equalization during the storage of the film packaging bags and in particular an overpressure within the film packaging bag to avoid.
  • dusty contents often has the problem that the air contained in the film packaging bag during filling can not escape easily.
  • a vent opening having inner film is provided, which is only partially connected to the bag film, so that when filling the film packaging bag from the filling displaced air can enter through the ventilation openings in areas between the inner film and the bag film and can leave these areas through a head-side filling opening.
  • This additional ventilation provided for the filling operation is also referred to as primary ventilation, the ventilation provided according to the invention after closure of the film packaging bag being correspondingly referred to as secondary ventilation by means of the ventilation channels.
  • the primary ventilation and the secondary ventilation can be implemented completely independently of one another and also by means of different ventilation paths. Accordingly, depending on the geometry of the film packaging bag and the intended contents also independent optimization of the primary vent on the one hand and the secondary venting on the other hand done.
  • the number of ventilation ducts or vents, the size of the respectively provided openings and openings and the length and width of the ventilation ducts can be adjusted according to the respective requirements.
  • the ventilation openings provided for the primary ventilation on the inner film can be produced for example by a needling, wherein Also, the puncture direction is taken into account. Thus, as seen in the puncture direction at the back of the film on which the needle tips emerge, warping formed.
  • the inner film can be arranged such that the elevations are arranged in the direction of the bag film or in the direction of the bag interior. In the first case, the elevations serve as spacers, so that in the areas in which the inner film and the bag film are not connected to each other, a distance from the bag film is produced, which promotes a particularly rapid primary vent. On the other hand, if the protrusions are arranged in the direction of the bag interior, this leads to an increase in the roughness.
  • the two described effects can also be combined.
  • the increase in roughness can in particular be achieved during the filling of the film packaging bag, even at high filling speeds, to achieve a uniform distribution of the filling material.
  • the bag film and the inner film are preferably connected to each other in the region of the longitudinal edges, wherein the areas arranged therebetween remain unconnected.
  • the connection between the inner film and the bag film can be effected for example by heat sealing or preferably by adhesive.
  • the invention also relates to a method for producing a film packaging bag according to claim 9.
  • the outlet openings can be produced, for example, with knives which produce small cuts in the area of the channel-shaped, unsealed sections, which are also referred to as microcuts. Alternatively, however, the outlet openings can also be punched out.
  • the longitudinal sealing seam is formed directly on the folded edge, wherein the longitudinal sealing seam, starting from the interruption, has an edge-side recess in at least one direction, whereby the channel-shaped unsealed portion formed by the recess, which forms the ventilation channel, passes through a narrow web of the longitudinal sealing seam from the interior the film tube is disconnected.
  • side folds are formed when folding the film tube, which are arranged between the front surfaces.
  • the generation of gussets can be carried out, for example, with folding knives.
  • the folding is preferably carried out in such a way that the edges of the bag film are superimposed on one another at a longitudinal edge, the film tube then being closed circumferentially by sealing the edges together.
  • the other three longitudinal edges are present as folding edges, which are also preferably provided with longitudinal sealing seams.
  • the ventilation ducts described above are formed on at least one of the folded edges, preferably on a plurality of folded edges, by a corresponding configuration of the respective longitudinal sealing seam.
  • the web of the bag film is laminated in sections before being folded with another film web provided with ventilation openings, wherein the laminated composite is subsequently folded such that the further film web forms an inner film of the film tube, wherein the lining preferably takes place in the areas in which subsequently longitudinal or folding edges of the film tube are produced.
  • lamination with adhesive can also be provided to connect the inner film and the bag film by heat sealing.
  • the vent openings in the inner film can be produced for example by a needling, wherein a generation of vent openings is preferably provided only in the areas that are not laminated with the bag film.
  • the bag film and the inner film can be laminated in such a way that raised portions formed during the needling are arranged in the direction of the bag film.
  • the bag film can be formed without restriction as a monofilm, multilayer laminated film or coextruded film.
  • Suitable for example, is a multilayer film having an outer layer of polyester, preferably polyethylene terephthalate (PET) and a heat-sealable inner layer of polyolefin, preferably polyethylene (PE).
  • PET polyethylene terephthalate
  • PE polyethylene
  • an internal printing can also be provided.
  • the optionally provided inner film must be sealable to produce the longitudinal sealing seams and is preferably also formed from a polyolefin, for example polyethylene (PE).
  • PE polyethylene
  • Also advantageous is an embodiment in which the inner film and the single or multilayer bag film are made entirely of PE. In addition to a better recyclability is when stacking the foil packaging bag a achieved higher friction and accordingly reduces the risk of slippage of the bag from each other.
  • Fig. 1a shows a film packaging bag according to the invention during the filling with a powdery, dusty filling material.
  • the film packaging bag has two front surfaces 2 formed by a bag film 1 and side folds 3 arranged between the front surfaces 2.
  • longitudinal edges 4, 4 'each have a longitudinal sealing seam 5, 5'.
  • the edges of the bag film 1 are superimposed on one of the longitudinal edges 4 'and connected there with a continuous longitudinal seam 5', wherein the other longitudinal edges 4 are formed as folded edges.
  • the longitudinal sealing seams 5 provided there serve, on the one hand, to reinforce the film packaging bag.
  • ventilation channels 6, which are explained in detail in the following, are integrated into the longitudinal edges 4, which are designed as folding edges, and which each open into outlet openings 7 on the outside. The ventilation channels 6 are used to allow ventilation after closing the film packaging bag and in particular to avoid the build-up of an overpressure within the film packaging bag.
  • an additional inner film 8 is provided on the inside of the packaging bag, the vent openings 9 identifies in the form of a perforation.
  • the inner film 8 and the bag film 1 are connected to each other only in the region of the longitudinal edges 4, 4 'by adhesive 10, wherein the vent openings 9 are preferably provided only in the non-interconnected areas.
  • the inner film 8 and the bag film 1 may be superimposed only immediately upon formation of the bag and then joined by the longitudinal and transverse sealing seams provided for the formation of the bag, thereby eliminating the need for prior lamination or prior heat sealing.
  • the vent holes 9 can be produced for example by a needling, in which case, as in the Fig. 2 shown formed by the needling at the vent holes 9 elevations 11 are arranged in the direction of the bag film 1 and serve as spacers in the unconnected areas.
  • a fixing point a is provided at the upper edge, which can also be formed by adhesive 10 or a heat seal.
  • the bag film may be multi-layered.
  • a multilayer laminated pouch film with a transparent outer layer 12 made of polyester, preferably PET and a white inner layer 13 of polyolefin, preferably polyethylene, provided before the lamination of the outer layer 12 with the inner layer 13 an internal printing can be provided.
  • the inner film 8 may be formed multi-layered.
  • Ventilation ducts 6 are in the Fig. 3a to 3d shown.
  • the ventilation duct 6 is in each case arranged in the region of one of the longitudinal edges 4, which is designed as a folded edge, wherein the ventilation duct 6 is delimited by the longitudinal sealing seam 5 by the folded edge and in the direction of the bag-inside filling space.
  • At least one inlet opening 14 of the ventilation duct 6 is formed in each case by an interruption of the longitudinal sealing seam 5, wherein in each case at least one outlet opening 7 of the ventilation duct 6 is arranged in an offset.
  • Fig. 3a extends the longitudinal sealing seam 5, starting from the inlet opening 14 at a closed film packaging bag with a substantially constant thickness to the bottom of the bag up to a bottom-side transverse seam 15 and the head of the film packaging bag up to a top-side transverse seam 15 '. Accordingly, the formed ventilation duct 6 extends substantially over the entire length of the longitudinal edge 4 of the film packaging bag.
  • Fig. 3b to 3d show embodiments of the invention in which the ventilation ducts 6 each extend over only a part of the corresponding longitudinal edge 4, wherein the longitudinal sealing seam 5 in the region of the ventilation duct 6 has a smaller thickness and in the direction of the filling space forms a web 16 delimiting the ventilation duct 6.
  • the longitudinal sealing seam 5 has a greater thickness and is preferably in accordance with Fig. 3b to 3d arranged directly on the longitudinal edge 4.
  • the described embodiments are characterized by the fact that the visual appearance and the stability of the longitudinal edge 4 reinforced by the longitudinal sealing seam 5 are not or at least not substantially impaired.
  • Fig. 3b shows an L-shaped configuration of the ventilation duct 6 with an inlet opening 14 and an outlet opening 7.
  • T-shaped configurations with an inlet opening 14 and two outlet openings 7 FIG. Fig. 3c
  • C-shaped configuration with two inlet openings 14 and an outlet opening 7 is possible ( Fig. 3d ).
  • Fig. 4 shows a Kaschierverbund to form a packaging bag according to the invention, which is designed as a gusseted bag.
  • the lamination composite comprises a web of the bag film 1 and a further film web applied thereon, which forms the inner film 8 in the film packaging bags.
  • the inner film 8 and the bag film 1 are laminated in strip-shaped areas 17 by adhesive 10 together and unconnected between these areas 17.
  • the inner film 8 with the bag film 1 are in the areas that are not laminated with the bag film 1, produced by a needling vent openings 9.
  • Fig. 4 shows a Kaschierverbund to form a packaging bag according to the invention, which is designed as a gusseted bag.
  • the lamination composite comprises a web of the bag film 1 and a further film web applied thereon, which forms the inner film 8 in the film packaging bags.
  • the inner film 8 and the bag film 1 are laminated in strip-shaped areas 17 by adhesive 10 together and unconnected between these areas 17.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Packages (AREA)
  • Wrappers (AREA)
  • Air Bags (AREA)

Abstract

The foil packing bag has two opposite lying front surfaces formed by a bag foil and bordered by longitudinal folds (4). A ventilation unit is provided with an air duct (6) running in a longitudinal direction. The air duct is extended over a part of a length of the assigned longitudinal fold. The air duct has a section of a longitudinal sealed seam (5) with a small thickness. An independent claim is included for a method for manufacturing a foil packing bag.

Description

Die Erfindung betrifft einen Folienverpackungsbeutel, insbesondere für pulverförmiges, staubendes Füllgut, mit zwei gegenüberliegenden, von einer Beutelfolie gebildeten und von Längskanten begrenzten Frontflächen und mit zumindest einer Lüftungseinrichtung, die einen in Längsrichtung verlaufenden Lüftungskanal aufweist, wobei die Lüftungseinrichtung in dem Bereich einer der Längskanten angeordnet ist, die als Faltkante ausgebildet ist, wobei der Lüftungskanal durch die Faltkante und eine Längssiegelnaht, die den Lüftungskanal von einem beutelinnenseitigen Füllraum trennt, begrenzt ist und wobei eine Unterbrechung der Längssiegelnaht eine in dem Füllraum mündende Eintrittsöffnung bildet, zu der eine außenseitige Austrittsöffnung bildet, zu der eine außenseitige Austrittsöffnung des Lüftungskanals versetzt angeordnet ist. Die Lüftungseinrichtung kann je nach Anwendungsfall für eine Entlüftung, eine Belüftung oder eine kombinierte Be- und Entlüftung vorgesehen sein.The invention relates to a film packaging bag, in particular for powdery, dusty filling material, with two opposite, formed by a bag film and bounded by longitudinal edges front surfaces and at least one ventilation device having a longitudinally extending ventilation duct, wherein the ventilation device arranged in the region of one of the longitudinal edges which is designed as a folded edge, wherein the ventilation duct is bounded by the folded edge and a longitudinal sealing seam which separates the ventilation duct from a bag-inside filling space, and wherein an interruption of the longitudinal sealing seam forms an inlet opening into the filling space, to which an outside outlet opening forms, to which an outside outlet opening of the ventilation duct is arranged offset. The ventilation device can be provided depending on the application for a vent, ventilation or combined ventilation.

Bei einer Vielzahl von Produkten ist eine permanente Entlüftung vorgesehen, um dauerhaft ein Aufblähen der Folienverpackungsbeutel zu verhindern. Zu berücksichtigen ist dabei, dass insbesondere bei chemischen Produkten wie Gips, Zement, Fliesenkleber oder dergleichen auch während der Lagerung gasförmige Substanzen gebildet werden können, die bei einer nicht ausreichenden Entlüftung auch zu einem Aufplatzen des Folienverpackungsbeutels führen könnten.For a variety of products, a permanent venting is provided to permanently prevent swelling of the foil packaging bags. It should be taken into account that, in particular in the case of chemical products such as gypsum, cement, tile adhesive or the like, gaseous substances can also be formed during storage, which could also lead to bursting of the film packaging bag if ventilation is insufficient.

Ein Folienverpackungsbeutel mit den eingangs beschriebenen Merkmalen ist aus der DE 20 2008 008 303 U1 bekannt. Der Folienverpackungsbeutel in Form eines Seitenfaltenbeutels weist ausgehend von seinen Faltkanten nach Innen versetzte Längssiegelnähte auf, so dass zwischen den Längssiegelnähten und der jeweils zugeordneten Faltkante Hohlkanäle gebildet werden, welche sich über die gesamte Höhe des Folienverpackungsbeutels erstrecken. Um in den Füllraum mündende Eintrittsöffnungen zu bilden, weisen die Längssiegelnähte jeweils eine Unterbrechung auf. Dadurch, dass die Längssiegelnähte ausgehend von der Faltkante auf der gesamten Beutellänge nach Innen versetzt sind, kann sich die Folie, aus der der Beutel gebildet ist, im Bereich der durchgehenden Hohlkanäle aufspreizen, wodurch das Erscheinungsbild des Beutels beeinträchtigt wird. Bei der Lagerung und Handhabung des Folienverpackungsbeutels besteht auch die erhöhte Gefahr, dass die Lüftungskanäle aufgrund mechanischer Belastungen in ihrer Funktion beeinträchtigt werden. Aufgrund der geringen Stabilität der Lüftungskanäle selbst können diese beispielsweise durch Druckeinwirkung abgequetscht werden, wobei dann keine ausreichende Belüftung erfolgt. Des Weiteren besteht auch die erhöhte Gefahr, dass bei der Handhabung des Folienverpackungsbeutels die Faltkanten im Bereich der durchgehenden Hohlkanäle an scharfen Kanten oder spitzen Gegenständen aufreißen, so dass dann eine unkontrollierte Belüftung erfolgt.A film packaging bag with the features described above is known from DE 20 2008 008 303 U1 known. The film packaging bag in the form of a gusseted bag, starting from its folded edges, has inwardly offset longitudinal sealing seams, so that hollow channels are formed between the longitudinal sealing seams and the respective associated folding edge extend over the entire height of the foil pouch. In order to form inlet openings opening into the filling space, the longitudinal sealing seams each have an interruption. Characterized in that the longitudinal sealing seams are offset from the fold edge on the entire bag length inside, the film from which the bag is formed, spread in the region of the continuous hollow channels, whereby the appearance of the bag is impaired. During storage and handling of the foil packaging bag, there is also the increased risk that the ventilation channels will be impaired due to mechanical stress in their function. Due to the low stability of the ventilation ducts themselves, they can be squeezed off, for example, by pressure, in which case there is no adequate ventilation. Furthermore, there is also the increased risk that, during handling of the film packaging bag, the folded edges in the region of the continuous hollow channels tear at sharp edges or pointed objects, so that then an uncontrolled ventilation takes place.

Ein Folienverpackungsbeutel mit einem in Längsrichtung verlaufenden Lüftungskanal ist aus der EP 0 768 245 A1 bekannt, wobei Ränder der Beutelfolie sich an einer der beiden Frontflächen überlappen und dort mit zwei parallelen Längssiegelnähten verbunden sind. Eine der Längssiegelnähte weist eine Unterbrechung auf, die in einen Füllraum des Beutels mündet und eine Eintrittsöffnung eines zwischen den beiden Siegelnähten gebildeten Entlüftungskanals bildet, wobei zumindest eine Austrittsöffnung des Entlüftungskanals in Längsrichtung versetzt durch eine außenseitige Öffnung in der Beutelfolie oder eine Unterbrechung in der anderen Siegelnaht gebildet ist. Die Herstellung des Folienverpackungsbeutels ist aufwendig, da zwei parallele Siegelnähte erzeugt werden müssen. Da der Entlüftungskanal in einem mittleren Bereich einer der Frontflächen angeordnet ist, besteht auch eine erhöhte Gefahr, dass sich die Eintrittsöffnung mit dem Füllgut zusetzt und dann eine sichere Entlüftung nicht mehr gewährleistet werden kann. Des Weiteren muss die beschriebene Beutelfolie sowohl an der Innenseite als auch an der Außenseite heißsiegelbar ausgeführt sein. Aufgrund seiner bauchigen Form kann der als einfacher Schlauchbeutel ausgebildete Folienverpackungsbeutel nur schlecht gestapelt oder aufgestellt werden.A foil packaging bag with a longitudinal ventilation duct is out of EP 0 768 245 A1 Known, wherein edges of the bag film overlap on one of the two front surfaces and are connected there with two parallel longitudinal sealing seams. One of the longitudinal sealing seams has an interruption, which opens into a filling space of the bag and forms an inlet opening of a ventilation channel formed between the two sealing seams, wherein at least one outlet opening of the ventilation channel offset in the longitudinal direction by an outside opening in the bag film or an interruption in the other sealing seam is formed. The production of the film packaging bag is complicated because two parallel sealing seams have to be produced. Since the ventilation channel is arranged in a central region of one of the front surfaces, there is also an increased risk that the inlet opening becomes clogged with the filling material and then safe ventilation can no longer be guaranteed. Furthermore, the described bag film must be heat-sealable both on the inside and on the outside. Due to its bulbous shape designed as a simple tubular bag foil packaging bag can be stacked or placed poorly.

Der Erfindung liegt die Aufgabe zugrunde, einen permanent belüfteten Folienverpackungsbeutel anzugeben, der für pulverförmiges und staubendes Füllgut geeignet ist, ein hochwertiges Erscheinungsbild aufweist und eine erhöhte Funktionssicherheit des Lüftungseinrichtung aufweist.The invention has for its object to provide a permanently ventilated film packaging bag, which is suitable for powdery and dusty contents, has a high quality appearance and has increased reliability of the ventilation device.

Die Aufgabe wird erfindungsgemäß durch einen Folienverpackungsbeutel gemäß Patentanspruch 1 gelöst. Erfindungsgemäß ist vorgesehen, dass der zumindest eine Lüftungskanal sich über einen Teil der Länge der zugeordneten Längssiegelnaht erstreckt, wobei vorzugsweise der den Lüftungskanal seitlich begrenzende Abschnitt der Längssiegelnaht eine geringere Dicke aufweist als ein an die Austrittsöffnung des Lüftungskanals anschließender Abschnitt. Dabei ergibt sich der Vorteil, dass die entsprechende Längskante oberhalb und unterhalb des Lüftungskanals vollständig versiegelt ist. Zusätzlich ist der Lüftungskanal auch zum Füllraum des Folienverpackungsbeutels durch einen schmalen Steg der Längssiegelnaht begrenzt. Im Rahmen einer solchen Ausgestaltung kann der zumindest eine Entlüftungskanal optimal in die zugeordnete Längskante integriert werden. Insbesondere werden die Stabilität der Längskante und das optische Erscheinungsbild praktisch nicht beeinträchtigt. Der in einen Abschnitt der Längskante integrierte Lüftungskanal ist zusätzlich auf besonders vorteilhafte Weise vor einem Verknicken oder einer Beschädigung geschützt. Im Rahmen der beschriebenen Ausgestaltung können an den als Faltkanten ausgebildeten Längskanten des Folienverpackungsbeutels jeweils auch mehrere in Längsrichtung voneinander beabstandete und voneinander unabhängige Lüftungskanäle gebildet werden. Erfindungsgemäß ist vorgesehen, den Lüftungskanal an der Seite des Folienverpackungsbeutels im Bereich der Faltkante zu bilden, wozu lediglich eine einzige Längssiegelnaht erzeugt werden muss. Durch die seitliche Anordnung des Lüftungskanals und die Ausbildung der Längssiegelnaht wird auch erreicht, dass im Vergleich zu der aus dem Stand der Technik bekannten Ausführung unmittelbar vor der Eintrittsöffnung eine geringere Menge an Füllgut vorliegt, so dass auch die Gefahr eines Verstopfens der Eintrittsöffnung des Lüftungskanals reduziert werden kann. Schließlich kann durch die seitliche Längssiegelnaht auch die Stabilität des Folienverpackungsbeutels erhöht werden. Die Zuordnung der Begriffe Eintrittsöffnung und Austrittsöffnung dient im Rahmen der Erfindung in erster Linie der Unterscheidung und entspricht nur in dem Fall einer Entlüftung aus dem Beutel heraus der tatsächlichen Strömungsrichtung bei einem Gasaustausch.The object is achieved by a film packaging bag according to claim 1. According to the invention, it is provided that the at least one ventilation channel extends over part of the length of the associated longitudinal sealing seam, the section of the longitudinal sealing seam laterally delimiting the ventilation channel preferably having a smaller thickness than a section adjoining the outlet opening of the ventilation channel. This results in the advantage that the corresponding longitudinal edge above and below the ventilation duct is completely sealed. In addition, the ventilation duct is also limited to the filling space of the film packaging bag by a narrow web of the longitudinal sealing seam. In the context of such an embodiment, the at least one venting channel can be optimally integrated into the associated longitudinal edge. In particular, the stability of the longitudinal edge and the visual appearance are virtually unaffected. The integrated into a portion of the longitudinal edge ventilation duct is additionally protected in a particularly advantageous manner from kinking or damage. In the context of the described embodiment, a plurality of longitudinally spaced apart from one another and independent of each other at the longitudinal edges of the film packaging bag formed as folding edges Ventilation channels are formed. According to the invention, it is provided to form the ventilation channel on the side of the film packaging bag in the region of the folded edge, for which purpose only a single longitudinal sealing seam has to be produced. By the lateral arrangement of the ventilation duct and the formation of the longitudinal sealing seam is also achieved that in comparison to the known from the prior art embodiment immediately before the inlet opening a smaller amount of contents is present, so that reduces the risk of clogging the inlet opening of the ventilation duct can be. Finally, the stability of the foil packaging bag can be increased by the lateral longitudinal sealing seam. In the context of the invention, the assignment of the terms inlet opening and outlet opening primarily serves to distinguish and only corresponds to the actual flow direction in the case of a gas exchange in the event of a venting out of the bag.

Um den Folienverpackungsbeutel mit pulverförmigem, staubigen Füllgut, beispielsweise Baustoffen wie Zement, Gips oder Fliesenkleber oder pulverförmigen Produkten der Chemie- oder Nahrungsmittelindustrie, zu befüllen, ist dieser zunächst an seiner Oberseite oder seiner Unterseite noch nicht verschlossen. Nach einem Verschluss des Beutels, vorzugsweise durch eine Quersiegelnaht, gewährleistet der Lüftungskanal eine permanente Belüftung.To fill the film packaging bag with powdery, dusty filling material, for example, building materials such as cement, gypsum or tile adhesive or powdered products of the chemical or food industry, this is not yet sealed at its top or bottom. After a closure of the bag, preferably by a transverse sealing seam, ensures the ventilation duct permanent ventilation.

Der Folienverpackungsbeutel ist vorzugsweise durch Falten und Siegeln aus der Beutelfolie gebildet, wobei Ränder der Beutelfolie an einer Längskante, an der keine Lüftungseinrichtung vorgesehen ist, mittels einer durchgehenden Längssiegelnaht verbunden werden können. Da dabei die Innenflächen der Beutelfolie direkt aufeinander gelegt werden können, muss bei einer mehrschichtigen Ausgestaltung der Beutelfolie die Außenschicht nicht heißsiegelbar sein.The film packaging bag is preferably formed by folding and sealing from the bag film, wherein edges of the bag film can be connected to a longitudinal edge on which no ventilation device is provided by means of a continuous longitudinal seam. Since the inner surfaces of the bag film can be placed directly on top of each other, the outer layer does not have to be heat-sealable in the case of a multilayer configuration of the bag film.

Gemäß einer bevorzugten Ausgestaltung der Erfindung ist der Folienverpackungsbeutel als Seitenfaltenbeutel mit zwischen den Frontflächen angeordneten Seitenfalten ausgebildet, wobei die dann insgesamt vier Längskanten jeweils zwischen einer der Seitenfalten einerseits und einer der Frontflächen andererseits gebildet sind. Wenn wie zuvor beschrieben auch bei einer solchen Ausgestaltung vorgesehen ist, die Ränder der Beutelfolie an einer der vier Längskanten mit einer durchgehenden Längssiegelnaht miteinander zu verbinden, sind die anderen drei Längskanten als Faltkanten ausgebildet und werden zweckmäßigerweise mit Längssiegelnähten versehen. Ein so gebildeter Seitenfaltenbeutel zeichnet sich durch eine sehr gute Stabilität aus und kann bei der Ausbildung eines Standbodens auch stehend gelagert werden. Zusätzlich ergibt sich eine Quaderform, so dass mehrere Folienverpackungsbeutel leicht und platzsparend gelagert und auch gestapelt werden können.According to a preferred embodiment of the invention, the film packaging bag is designed as a side-fold bag with side folds arranged between the front surfaces, wherein the then four longitudinal edges are each formed between one of the side folds on the one hand and one of the front faces on the other hand. If, as described above, it is also provided in such an embodiment to connect the edges of the bag film to one another at one of the four longitudinal edges with a continuous longitudinal seam, the other three longitudinal edges are formed as folded edges and are expediently provided with longitudinal sealing seams. A side gusset bag thus formed is characterized by a very good stability and can also be stored standing when forming a standing floor. In addition, a cuboid shape results, so that a plurality of foil packaging bags can be easily and space-saving stored and also stacked.

Bei der beschriebenen Ausgestaltung der Folienverpackungsbeutel als Seitenfaltenbeutel können auch an mehreren der als Faltkanten ausgebildeten Längskanten Lüftungskanäle vorgesehen sein, ohne dass der Herstellungsaufwand wesentlich erhöht wird. Auch wenn sich die Eintrittsöffnung eines Lüftungskanals zusetzt, kann durch die weiteren Lüftungskanäle eine sichere Ent- und/oder Belüftung gewährleistet und beispielsweise ein Aufblähen des Folienverpackungsbeutels vermieden werden.In the described embodiment of the foil packaging bag as side gusseted bags ventilation channels can be provided at several of the longitudinal edges formed as folding edges, without the production cost is substantially increased. Even if the inlet opening of a ventilation duct is clogged, safe ventilation and / or ventilation can be ensured by the further ventilation ducts and, for example, swelling of the foil packaging bag can be avoided.

Die in der Beutelfolie gebildeten außenseitigen Austrittsöffnungen können beispielsweise durch Ausstanzungen oder Einschnitte gebildet werden.The outside outlet openings formed in the bag film can be formed, for example, by punches or cuts.

Wenn die Lüftungseinrichtung zur Entlüftung vorgesehen ist, ist die Bildung von Austrittsöffnungen durch Einschnitte, die beide an der zugeordneten Faltkante übereinander gelegten Lagen der Beutelfolie durchtrennen, bevorzugt. Entsprechende Einschnitte können bei der Herstellung des Folienverpackungsbeutels auf besonders einfache Weise mit Messern erzeugt werden. Wenn lediglich Einschnitte vorgesehen werden, besteht auch der Vorteil, dass eine gewisse Ventilfunktion erreicht wird. Der Erfindung liegt dabei die Erkenntnis zugrunde, dass durch die Belüftung ein hoher Überdruck in dem Beutel und ein Aufblähen vermieden werden sollen, wobei jedoch einerseits ein übermäßiger Eintritt von Umgebungsluft, Feuchtigkeit oder Dampf vermieden werden sollen und andererseits ein geringer Überdruck, der nicht zu einem übermäßigen Aufblähen des Beutels führt, hingenommen werden kann und im Hinblick auf den Eintritt unerwünschter Stoffe während der Lagerung sogar vorteilhaft sein kann. Wesentlich ist des Weiteren, dass durch den Lüftungskanal mit den in Längsrichtung versetzt angeordneten Eintritts- und Austrittsöffnungen eine Labyrinthabdichtung erreicht wird. Ausstanzungen sind besonders dann vorteilhaft, wenn die Lüftungseinrichtung zur kontrollierten Belüftung vorgesehen ist. Eine kontrollierte Belüftung kann beispielsweise bei Nahrungsmitteln vorgesehen sein.If the venting device is provided for venting, the formation of outlet openings is preferred by means of incisions, which cut through both layers of the bag film which are superimposed on the associated folding edge. Appropriate Notches can be produced in a particularly simple manner with knives in the production of the film packaging bag. If only cuts are provided, there is also the advantage that a certain valve function is achieved. The invention is based on the finding that a high pressure in the bag and inflation should be avoided by the ventilation, but on the one hand, an excessive entry of ambient air, moisture or steam should be avoided and on the other hand, a slight overpressure, not to a excessive inflation of the bag, can be tolerated and even be beneficial in terms of the entry of undesirable substances during storage. It is also essential that a labyrinth seal is achieved through the ventilation duct with the entry and exit openings offset in the longitudinal direction. Punches are particularly advantageous when the ventilation device is provided for controlled ventilation. Controlled ventilation may be provided for food, for example.

Im Rahmen der Erfindung kann vorgesehen sein, dass jeder der Lüftungskanäle eine Eintrittsöffnung und eine Austrittsöffnung aufweist, wobei der Lüftungskanal L-förmig ausgebildet ist. Denkbar sind aber auch Ausgestaltungen, bei denen in einer T-förmigen Anordnung zwei voneinander beabstandete Austrittsöffnungen mit einer dazwischen angeordneten Eintrittsöffnung vorgesehen sind. Eine C-förmige Ausgestaltung ergibt sich, wenn eine Austrittsöffnung zwischen zwei versetzt angeordneten Eintrittsöffnungen vorgesehen ist.In the context of the invention it can be provided that each of the ventilation ducts has an inlet opening and an outlet opening, wherein the ventilation duct is L-shaped. Conceivable, however, are embodiments in which two spaced-apart outlet openings are provided with an inlet opening arranged therebetween in a T-shaped arrangement. A C-shaped configuration results when an outlet opening is provided between two staggered inlet openings.

Die zuvor beschriebene erfindungsgemäße Belüftung ist dazu vorgesehen bei der Lagerung der Folienverpackungsbeutel einen Druckausgleich zu ermöglichen und insbesondere einen Überdruck innerhalb des Folienverpackungsbeutels zu vermeiden. Darüber hinaus besteht bei dem Abfüllen von pulverförmigem, staubenden Füllgut häufig das Problem, dass die in dem Folienverpackungsbeutel enthaltene Luft während der Befüllung nicht ohne Weiteres entweichen kann. Um bei der Befüllung eine zusätzliche, schnelle Entlüftung zu ermöglichen ist im Rahmen einer bevorzugten Ausgestaltung vorgesehen, dass an der Beutelinnenseite eine Entlüftungsöffnung aufweisende Innenfolie vorgesehen ist, die nur abschnittsweise mit der Beutelfolie verbunden ist, so dass bei einer Befüllung des Folienverpackungsbeutels die aus dem Füllraum verdrängte Luft durch die Entlüftungsöffnungen in Bereiche zwischen der Innenfolie und der Beutelfolie eintreten und diese Bereiche durch eine kopfseitige Einfüllöffnung verlassen kann. Diese zusätzliche für den Befüllvorgang vorgesehene Entlüftung wird auch als Primärentlüftung bezeichnet, wobei die nach dem Verschließen des Folienverpackungsbeutels erfindungsgemäß vorgesehene Belüftung mittels der Lüftungskanäle entsprechend als Sekundärentlüftung bezeichnet wird.The above-described ventilation according to the invention is intended to allow a pressure equalization during the storage of the film packaging bags and in particular an overpressure within the film packaging bag to avoid. In addition, in the filling of powdery, dusty contents often has the problem that the air contained in the film packaging bag during filling can not escape easily. In order to allow an additional, rapid venting during filling is provided in a preferred embodiment that on the inside of the bag a vent opening having inner film is provided, which is only partially connected to the bag film, so that when filling the film packaging bag from the filling displaced air can enter through the ventilation openings in areas between the inner film and the bag film and can leave these areas through a head-side filling opening. This additional ventilation provided for the filling operation is also referred to as primary ventilation, the ventilation provided according to the invention after closure of the film packaging bag being correspondingly referred to as secondary ventilation by means of the ventilation channels.

Im Rahmen der vorliegenden Erfindung ergibt sich der Vorteil, dass die Primärentlüftung und die Sekundärentlüftung vollständig unabhängig voneinander und auch durch unterschiedliche Lüftungswege realisiert werden können. Entsprechend kann abhängig von der Geometrie des Folienverpackungsbeutels und dem vorgesehenen Füllgut auch eine unabhängige Optimierung der Primärentlüftung einerseits und der Sekundärentlüftung andererseits erfolgen. So können beispielsweise die Anzahl der Lüftungskanäle bzw. der Entlüftungsöffnungen, die Größe der jeweils vorgesehenen Öffnungen und Durchbrüche und die Länge und Breite der Lüftungskanäle entsprechend der jeweiligen Erfordernisse angepasst werden.In the context of the present invention, there is the advantage that the primary ventilation and the secondary ventilation can be implemented completely independently of one another and also by means of different ventilation paths. Accordingly, depending on the geometry of the film packaging bag and the intended contents also independent optimization of the primary vent on the one hand and the secondary venting on the other hand done. Thus, for example, the number of ventilation ducts or vents, the size of the respectively provided openings and openings and the length and width of the ventilation ducts can be adjusted according to the respective requirements.

Die für die Primärentlüftung an der Innenfolie vorgesehenen Entlüftungsöffnungen können beispielsweise durch eine Nadelung erzeugt werden, wobei auch die Einstichrichtung zu berücksichtigen ist. So werden in Einstichrichtung gesehen an der Rückseite der Folie, an der die Nadelspitzen heraustreten, Aufwerfungen gebildet. Die Innenfolie kann dabei derart angeordnet werden, dass die Aufwerfungen in Richtung der Beutelfolie oder in Richtung des Beutelinnenraums angeordnet sind. In dem ersten Fall dienen die Aufwerfungen als Abstandhalter, so dass in den Bereichen, in denen die Innenfolie und die Beutelfolie nicht miteinander verbunden sind, ein Abstand zur Beutelfolie erzeugt wird, der eine besonders schnelle Primärentlüftung fördert. Wenn die Aufwerfungen dagegen in Richtung des Beutelinnenraums angeordnet sind, führt dies dort zu einer Erhöhung der Rauhigkeit. Bei einer wechselseitigen Nadelung oder abschnittsweise wechselseitigen Nadelungen können auch die beiden beschriebenen Effekte kombiniert werden, Die Erhöhung der Rauhigkeit kann insbesondere dazu betragen während des Befüllens des Folienverpackungsbeutels auch bei hohen Füllgeschwindigkeiten eine gleichmäßige Verteilung des Füllgutes zu erreichen.The ventilation openings provided for the primary ventilation on the inner film can be produced for example by a needling, wherein Also, the puncture direction is taken into account. Thus, as seen in the puncture direction at the back of the film on which the needle tips emerge, warping formed. The inner film can be arranged such that the elevations are arranged in the direction of the bag film or in the direction of the bag interior. In the first case, the elevations serve as spacers, so that in the areas in which the inner film and the bag film are not connected to each other, a distance from the bag film is produced, which promotes a particularly rapid primary vent. On the other hand, if the protrusions are arranged in the direction of the bag interior, this leads to an increase in the roughness. In the case of a mutual needling or sections of alternating needling, the two described effects can also be combined. The increase in roughness can in particular be achieved during the filling of the film packaging bag, even at high filling speeds, to achieve a uniform distribution of the filling material.

Die Beutelfolie und die Innenfolie sind vorzugsweise im Bereich der Längskanten miteinander verbunden, wobei die dazwischen angeordneten Bereiche unverbunden bleiben. Die Verbindung zwischen Innenfolie und Beutelfolie kann beispielsweise durch Heißsiegeln oder vorzugsweise durch Klebstoff erfolgen.The bag film and the inner film are preferably connected to each other in the region of the longitudinal edges, wherein the areas arranged therebetween remain unconnected. The connection between the inner film and the bag film can be effected for example by heat sealing or preferably by adhesive.

Gegenstand der Erfindung ist auch ein Verfahren zur Herstellung eines Folienverpackungsbeutels, gemäß Patentanspruch 9. Die Austrittsöffnungen können beispielsweise mit Messern erzeugt werden, die im Bereich der kanalförmigen, unversiegelten Abschnitte kleine Einschnitte erzeugen, die auch als Mikrocuts bezeichnet werden. Alternativ können die Austrittsöffnungen jedoch auch ausgestanzt werden.The invention also relates to a method for producing a film packaging bag according to claim 9. The outlet openings can be produced, for example, with knives which produce small cuts in the area of the channel-shaped, unsealed sections, which are also referred to as microcuts. Alternatively, however, the outlet openings can also be punched out.

Erfindungsgemäß wird die Längssiegelnaht unmittelbar an der Faltkante gebildet, wobei die Längssiegelnaht ausgehend von der Unterbrechung in zumindest einer Richtung eine randseitige Aussparung aufweist, wodurch der durch die Aussparung gebildete kanalförmige unversiegelte Abschnitt, der den Lüftungskanal bildet, durch einen schmalen Steg der Längssiegelnaht von dem Innenraum des Folienschlauches getrennt wird.According to the invention, the longitudinal sealing seam is formed directly on the folded edge, wherein the longitudinal sealing seam, starting from the interruption, has an edge-side recess in at least one direction, whereby the channel-shaped unsealed portion formed by the recess, which forms the ventilation channel, passes through a narrow web of the longitudinal sealing seam from the interior the film tube is disconnected.

Gemäß einer bevorzugten Ausgestaltung der Erfindung werden beim Falten des Folienschlauches Seitenfalten gebildet, die zwischen den Frontflächen angeordnet sind. Die Erzeugung der Seitenfalten kann beispielsweise mit Faltmessern durchgeführt werden. Das Falten erfolgt vorzugsweise derart, dass die Ränder der Beutelfolie an einer Längskante übereinander gelegt werden, wobei dann durch eine Versiegelung der Ränder miteinander der Folienschlauch umfangsseitig geschlossen wird. Bei einer Ausgestaltung mit Seitenfalten liegen dann die übrigen drei Längskanten als Faltkanten vor, wobei auch diese vorzugsweise mit Längssiegelnähten versehen werden. Bei der Erzeugung der Längssiegelnähte werden an zumindest einer der Faltkanten, vorzugsweise an mehreren Faltkanten durch eine entsprechende Ausgestaltung der jeweiligen Längssiegelnaht die zuvor beschriebenen Lüftungskanäle gebildet.According to a preferred embodiment of the invention, side folds are formed when folding the film tube, which are arranged between the front surfaces. The generation of gussets can be carried out, for example, with folding knives. The folding is preferably carried out in such a way that the edges of the bag film are superimposed on one another at a longitudinal edge, the film tube then being closed circumferentially by sealing the edges together. In an embodiment with gussets then the other three longitudinal edges are present as folding edges, which are also preferably provided with longitudinal sealing seams. When producing the longitudinal sealing seams, the ventilation ducts described above are formed on at least one of the folded edges, preferably on a plurality of folded edges, by a corresponding configuration of the respective longitudinal sealing seam.

Von dem gebildeten Folienschlauch werden abschließend einzelne Folienverpackungsbeutel abgetrennt, die zunächst an der Oberseite oder der Unterseite offen sind, um eine nachfolgende Befüllung zu ermöglichen.From the formed film tube, individual film packaging bags are finally separated, which are initially open at the top or the bottom to allow subsequent filling.

Gemäß einer bevorzugten Ausgestaltung des Verfahren ist vorgesehen, dass die Bahn der Beutelfolie vor dem Falten mit einer weiteren mit Entlüftungsöffnungen versehenen Folienbahn abschnittsweise kaschiert wird, wobei der Kaschierverbund nachfolgend derart gefaltet wird, dass die weitere Folienbahn eine Innenfolie des Folienschlauchs bildet, wobei die Kaschierung vorzugsweise in den Bereichen erfolgt, in denen nachfolgend Längs- bzw. Faltkanten des Folienschlauches erzeugt werden. Anstelle der Kaschierung mit Klebstoff kann auch vorgesehen sein, die Innenfolie und die Beutelfolie durch Heißsiegeln zu verbinden.According to a preferred embodiment of the method, it is provided that the web of the bag film is laminated in sections before being folded with another film web provided with ventilation openings, wherein the laminated composite is subsequently folded such that the further film web forms an inner film of the film tube, wherein the lining preferably takes place in the areas in which subsequently longitudinal or folding edges of the film tube are produced. Instead of lamination with adhesive can also be provided to connect the inner film and the bag film by heat sealing.

Die Entlüftungsöffnungen in der Innenfolie können beispielsweise durch eine Nadelung erzeugt werden, wobei eine Erzeugung von Entlüftungsöffnungen vorzugsweise lediglich in den Bereichen vorgesehen ist, die nicht mit der Beutelfolie kaschiert werden. Die Beutelfolie und die Innenfolie können dabei derart kaschiert werden, dass bei der Nadelung gebildete Aufwerfungen in Richtung der Beutelfolie angeordnet sind. Durch eine solche Anordnung kann erreicht werden, dass zwischen der Beutelfolie und der Innenfolie zumindest ein geringer Abstand verbleibt, der bei einer Befüllung des Beutels die Luftabfuhr durch die Entlüftungsöffnungen und den Bereich zwischen der Innenfolie und der Beutelfolie erleichtern.The vent openings in the inner film can be produced for example by a needling, wherein a generation of vent openings is preferably provided only in the areas that are not laminated with the bag film. The bag film and the inner film can be laminated in such a way that raised portions formed during the needling are arranged in the direction of the bag film. By such an arrangement it can be achieved that at least a small distance remains between the bag film and the inner film, which facilitates the air discharge through the vent openings and the area between the inner film and the bag film when the bag is filled.

Die Beutelfolie kann im Rahmen der Erfindung ohne Einschränkung als Monofolie, mehrschichtig kaschierte Folie oder coextrudierte Folie ausgebildet sein. Geeignet ist beispielsweise eine mehrschichtige Folie mit einer Außenschicht aus Polyester, vorzugsweise Polyethylenterephthalat (PET) und einer heißsiegelbaren Innenschicht aus Polyolefin, vorzugsweise Polyethylen (PE). Bei einer mehrschichtig kaschierten Beutelfolie kann insbesondere auch eine innenliegende Bedruckung vorgesehen sein. Die optional vorgesehene Innenfolie muss zur Erzeugung der Längssiegelnähte siegelbar sein und ist vorzugsweise auch aus einem Polyolefin, beispielsweise Polyethylen (PE) gebildet. Vorteilhaft ist auch eine Ausgestaltung, bei der die Innenfolie und die ein- oder mehrschichtige Beutelfolie vollständig aus PE bestehen. Neben einer besseren Recyclebarkeit wird dabei bei einem Stapeln der Folienverpackungsbeutel eine höhere Reibung erreicht und entsprechend die Gefahr eines Abrutschens der Beutel voneinander reduziert.Within the scope of the invention, the bag film can be formed without restriction as a monofilm, multilayer laminated film or coextruded film. Suitable, for example, is a multilayer film having an outer layer of polyester, preferably polyethylene terephthalate (PET) and a heat-sealable inner layer of polyolefin, preferably polyethylene (PE). In the case of a multilayer laminated pouch film, in particular an internal printing can also be provided. The optionally provided inner film must be sealable to produce the longitudinal sealing seams and is preferably also formed from a polyolefin, for example polyethylene (PE). Also advantageous is an embodiment in which the inner film and the single or multilayer bag film are made entirely of PE. In addition to a better recyclability is when stacking the foil packaging bag a achieved higher friction and accordingly reduces the risk of slippage of the bag from each other.

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

Fig. 1a
einen Folienverpackungsbeutel während der Befüllung,
Fig. 1b
der Folienbeutel gemäß Fig. 1a im geschlossenen Zustand,
Fig. 2
ein Schnitt entlang der Linie A-A der Fig. 1a
Fig. 3a - 3d
alternative Ausgestaltungen von Entlüftungskanälen im Bereich einer Längskante des Folienverpackungsbeutels,
Fig. 4
einen Kaschierverbund zur Bildung des Folienverpackungs- beutels.
The invention will be explained in the following with reference to a drawing showing only one exemplary embodiment. They show schematically:
Fig. 1a
a foil packaging bag during filling,
Fig. 1b
the foil bag according to Fig. 1a when closed,
Fig. 2
a section along the line AA the Fig. 1a
Fig. 3a - 3d
alternative embodiments of ventilation channels in the region of a longitudinal edge of the film packaging bag,
Fig. 4
a Kaschierverbund to form the film packaging bag.

Fig. 1a zeigt einen erfindungsgemäßen Folienverpackungsbeutel während der Befüllung mit einem pulverförmigen, staubenden Füllgut. Fig. 1a shows a film packaging bag according to the invention during the filling with a powdery, dusty filling material.

Der Folienverpackungsbeutel weist zwei von einer Beutelfolie 1 gebildete Frontflächen 2 und zwischen den Frontflächen 2 angeordnete Seitenfalten 3 auf. Jeweils zwischen einer Frontfläche 2 und einer Seitenfalte 3 gebildete Längskanten 4, 4' weisen jeweils eine Längssiegelnaht 5, 5' auf. Die Ränder der Beutelfolie 1 sind an einer der Längskanten 4' übereinander gelegt und dort mit einer durchgehenden Längssiegelnaht 5' verbunden, wobei die weiteren Längskanten 4 als Faltkanten ausgebildet sind. Die dort vorgesehenen Längssiegelnähte 5 dienen einerseits zur Verstärkung des Folienverpackungsbeutels. Des Weiteren sind in die als Faltkanten ausgebildeten Längskanten 4 im Nachfolgenden im Detail erläuterte Lüftungskanäle 6 integriert, die jeweils in außenseitige Austrittsöffnungen 7 münden. Die Lüftungskanäle 6 dienen dazu nach dem Schließen des Folienverpackungsbeutels eine Belüftung zu ermöglichen und insbesondere den Aufbau eines Überdrucks innerhalb des Folienverpackungsbeutels zu vermeiden.The film packaging bag has two front surfaces 2 formed by a bag film 1 and side folds 3 arranged between the front surfaces 2. In each case formed between a front surface 2 and a side gusset 3 longitudinal edges 4, 4 'each have a longitudinal sealing seam 5, 5'. The edges of the bag film 1 are superimposed on one of the longitudinal edges 4 'and connected there with a continuous longitudinal seam 5', wherein the other longitudinal edges 4 are formed as folded edges. The longitudinal sealing seams 5 provided there serve, on the one hand, to reinforce the film packaging bag. Of Furthermore, ventilation channels 6, which are explained in detail in the following, are integrated into the longitudinal edges 4, which are designed as folding edges, and which each open into outlet openings 7 on the outside. The ventilation channels 6 are used to allow ventilation after closing the film packaging bag and in particular to avoid the build-up of an overpressure within the film packaging bag.

Um bei der Befüllung die Abfuhr von Luft zu ermöglichen, die durch das eingeschüttete Füllgut verdrängt wird, ist an der Innenseite des Verpackungsbeutels eine zusätzliche Innenfolie 8 vorgesehen, die Entlüftungsöffnungen 9 in Form einer Perforation ausweist. Wie einer vergleichenden Betrachtung der Fig. 1a und der Fig. 2 zu entnehmen ist, sind die Innenfolie 8 und die Beutelfolie 1 lediglich im Bereich der Längskanten 4, 4' durch Klebstoff 10 miteinander verbunden, wobei die Entlüftungsöffnungen 9 vorzugsweise nur in den nicht miteinander verbundenen Bereichen vorgesehen sind. Anstelle der beschriebenen Kaschierung mit Klebstoff 10 kann aber auch vorgesehen sein, die Innenfolie 8 und die Beutelfolie 1 durch Heißsiegeln zu verbinden. So können die Innenfolie 8 und die Beutelfolie 1 beispielsweise erst unmittelbar bei der Bildung des Beutels übereinandergelegt und dann durch die für die Ausformung des Beutels vorgesehenen Längs- und Quersiegelnähte verbunden werden, wodurch der Arbeitsschritt einer vorherigen Kaschierung oder vorherigen Heißsiegelung entfällt.In order to allow the filling of the discharge of air, which is displaced by the poured material, an additional inner film 8 is provided on the inside of the packaging bag, the vent openings 9 identifies in the form of a perforation. How to compare the Fig. 1a and the Fig. 2 it can be seen, the inner film 8 and the bag film 1 are connected to each other only in the region of the longitudinal edges 4, 4 'by adhesive 10, wherein the vent openings 9 are preferably provided only in the non-interconnected areas. Instead of the described lamination with adhesive 10 but can also be provided to connect the inner film 8 and the bag film 1 by heat sealing. Thus, for example, the inner film 8 and the bag film 1 may be superimposed only immediately upon formation of the bag and then joined by the longitudinal and transverse sealing seams provided for the formation of the bag, thereby eliminating the need for prior lamination or prior heat sealing.

Die Entlüftungsöffnungen 9 können beispielsweise durch eine Nadelung erzeugt werden, wobei dann, wie in der Fig. 2 dargestellt, durch die Nadelung an den Entlüftungsöffnungen 9 gebildete Aufwerfungen 11 in Richtung der Beutelfolie 1 angeordnet sind und in den unverbundenen Bereichen als Abstandhalter dienen. Bei der Befüllung des Folienverpackungsbeutels kann die von dem Füllgut verdrängte Luft durch die Entlüftungsöffnungen 9 in einen Zwischenraum zwischen der Innenfolie 8 und der Beutelfolie 1 gelangen und den unverschlossenen Folienverpackungsbeutel an seiner Oberseite verlassen. Um zu vermeiden, dass beim Befüllen der in Fig. 1a angedeutete Fülltrichter versehentlich zwischen der Beutelfolie 1 und der Innenfolie 8 eingeschoben wird, ist am oberen Rand eine Fixierstelle a vorgesehen, die auch durch Klebstoff 10 oder eine Heißsiegelung gebildet werden kann.The vent holes 9 can be produced for example by a needling, in which case, as in the Fig. 2 shown formed by the needling at the vent holes 9 elevations 11 are arranged in the direction of the bag film 1 and serve as spacers in the unconnected areas. When filling the film packaging bag, the displaced by the filling air through the vent holes 9 in a Gap between the inner film 8 and the bag film 1 and leave the unclosed film packaging bag at its top. In order to avoid that when filling the in Fig. 1a indicated hopper is accidentally inserted between the bag film 1 and the inner film 8, a fixing point a is provided at the upper edge, which can also be formed by adhesive 10 or a heat seal.

Die Beutelfolie kann mehrschichtig ausgebildet sein. So ist in dem Ausführungsbeispiel eine mehrschichtig kaschierte Beutelfolie mit einer durchsichtigen Außenschicht 12 aus Polyester, vorzugsweise PET und einer weißen Innenschicht 13 aus Polyolefin, vorzugsweise Polyethylen, vorgesehen, wobei vor der Kaschierung der Außenschicht 12 mit der Innenschicht 13 eine innenliegende Bedruckung vorgesehen sein kann. Auch die Innenfolie 8 kann mehrschichtig ausgebildet sein. So ist es beispielsweise zweckmäßig die Innenfolie 8 als Polyethylen-Coextrusionsfolie auszubilden, wobei der beutelinnenseitigen Folienschicht zur Erhöhung der Oberflächenrauhigkeit ein Füllstoff, beispielsweise Kreide, beigemischt werden kann.The bag film may be multi-layered. Thus, in the embodiment, a multilayer laminated pouch film with a transparent outer layer 12 made of polyester, preferably PET and a white inner layer 13 of polyolefin, preferably polyethylene, provided before the lamination of the outer layer 12 with the inner layer 13 an internal printing can be provided. The inner film 8 may be formed multi-layered. Thus, for example, it is expedient to form the inner film 8 as a polyethylene coextrusion film, wherein the bag inner side film layer to increase the surface roughness of a filler, such as chalk, can be mixed.

Verschiedene Ausgestaltungen von Lüftungskanälen 6 sind in den Fig. 3a bis 3d dargestellt. Übereinstimmend ist der Lüftungskanal 6 jeweils im Bereich einer der Längskanten 4 angeordnet, die als Faltkante ausgebildet ist, wobei der Lüftungskanal 6 durch die Faltkante und in Richtung des beutelinnenseitigen Füllraums durch die Längssiegelnaht 5 begrenzt wird. Zumindest eine Eintrittsöffnung 14 des Lüftungskanals 6 ist jeweils durch eine Unterbrechung der Längssiegelnaht 5 gebildet, wobei jeweils zumindest eine Austrittsöffnung 7 des Lüftungskanals 6 in einem Versatz angeordnet ist.Various embodiments of ventilation ducts 6 are in the Fig. 3a to 3d shown. The ventilation duct 6 is in each case arranged in the region of one of the longitudinal edges 4, which is designed as a folded edge, wherein the ventilation duct 6 is delimited by the longitudinal sealing seam 5 by the folded edge and in the direction of the bag-inside filling space. At least one inlet opening 14 of the ventilation duct 6 is formed in each case by an interruption of the longitudinal sealing seam 5, wherein in each case at least one outlet opening 7 of the ventilation duct 6 is arranged in an offset.

Gemäß dem nicht zur Erfindung gehörenden Ausführungsbeispiel der Fig. 3a erstreckt sich die Längssiegelnaht 5 ausgehend von der Eintrittsöffnung 14 bei einem geschlossenen Folienverpackungsbeutel mit einer im Wesentlichen gleichbleibenden Dicke zur Beutelunterseite bis zu einer unterseitigen Quernaht 15 und zum Kopf des Folienverpackungsbeutels bis zu einer oberseitigen Quernaht 15'. Entsprechend erstreckt sich auch der gebildete Lüftungskanal 6 im Wesentlichen über die gesamte Länge der Längskante 4 des Folienverpackungsbeutels.According to the not belonging to the invention embodiment of the Fig. 3a extends the longitudinal sealing seam 5, starting from the inlet opening 14 at a closed film packaging bag with a substantially constant thickness to the bottom of the bag up to a bottom-side transverse seam 15 and the head of the film packaging bag up to a top-side transverse seam 15 '. Accordingly, the formed ventilation duct 6 extends substantially over the entire length of the longitudinal edge 4 of the film packaging bag.

Die Fig. 3b bis 3d zeigen erfindungsgemäße Ausgestaltungen, bei denen die Lüftungskanäle 6 sich jeweils nur über einen Teil der entsprechenden Längskante 4 erstrecken, wobei die Längssiegelnaht 5 im Bereich des Lüftungskanals 6 eine geringere Dicke aufweist und in Richtung des Füllraumes einen den Lüftungskanal 6 begrenzenden Steg 16 bildet. Oberhalb und unterhalb des Lüftungskanals 6 weist die Längssiegelnaht 5 eine größere Dicke auf und ist vorzugsweise gemäß der Fig. 3b bis 3d unmittelbar an der Längskante 4 angeordnet. Die beschriebenen Ausgestaltungen zeichnen sich dadurch aus, dass die optische Erscheinung und die Stabilität der durch die Längssiegelnaht 5 verstärkten Längskante 4 nicht oder zumindest nicht wesentlich beeinträchtigt werden. Zusätzlich sind die Lüftungskanäle 6 auch durch die oberhalb und unterhalb unmittelbar anschließenden Abschnitte der Längssiegelnaht 5 und den von der Längssiegelnaht 5 gebildeten Steg 16 geschützt. Fig. 3b zeigt eine L-förmige Ausgestaltung des Lüftungskanals 6 mit einer Eintrittsöffnung 14 und einer Austrittsöffnung 7. Daneben sind auch T-förmige Ausgestaltungen mit einer Eintrittsöffnung 14 und zwei Austrittsöffnungen 7 (Fig. 3c) und mit einer C-förmigen Ausgestaltung mit zwei Eintrittsöffnungen 14 und einer Austrittsöffnung 7 möglich (Fig. 3d).The Fig. 3b to 3d show embodiments of the invention in which the ventilation ducts 6 each extend over only a part of the corresponding longitudinal edge 4, wherein the longitudinal sealing seam 5 in the region of the ventilation duct 6 has a smaller thickness and in the direction of the filling space forms a web 16 delimiting the ventilation duct 6. Above and below the ventilation duct 6, the longitudinal sealing seam 5 has a greater thickness and is preferably in accordance with Fig. 3b to 3d arranged directly on the longitudinal edge 4. The described embodiments are characterized by the fact that the visual appearance and the stability of the longitudinal edge 4 reinforced by the longitudinal sealing seam 5 are not or at least not substantially impaired. In addition, the ventilation ducts 6 are also protected by the above and below immediately adjoining sections of the longitudinal sealing seam 5 and the web 16 formed by the longitudinal sealing seam 5. Fig. 3b shows an L-shaped configuration of the ventilation duct 6 with an inlet opening 14 and an outlet opening 7. In addition, T-shaped configurations with an inlet opening 14 and two outlet openings 7 (FIG. Fig. 3c ) and with a C-shaped configuration with two inlet openings 14 and an outlet opening 7 is possible ( Fig. 3d ).

Durch den Versatz zwischen Eintrittsöffnung 14 und Austrittsöffnung 7 wird eine labyrinthartige Abdichtung erreicht. Von Vorteil ist des Weiteren, wenn die Austrittsöffnungen 7, wie in den Ausführungsbeispielen dargestellt, als kurze Einschnitte, sogenannte Microcuts, ausgebildet werden, wodurch insgesamt eine gewisse Ventilwirkung erreicht und bei der Lagerung der Eintritt unerwünschter Stoffe, wie Flüssigkeit oder Wasserdampf, in einem gewissen Maße verhindert werden können. Alternativ können aber auch Ausstanzungen vorgesehen sein, die insbesondere dann zweckmäßig sind, wenn ein weitgehend freier und direkter Luftaustausch und insbesondere auch ein Eintritt von Umgebungsluft ermöglicht werden soll. Um eine Anpassung an die jeweiligen Erfordernisse zu ermöglichen kann beispielsweise vorgesehen sein, die Länge und Breite des Lüftungskanals 6 sowie die Größe und Anordnung der Eintrittsöffnung 14 und der Austrittsöffnung 7 zu verändern. Schließlich können an der Längskante 4 auch mehrere der in den Fig. 3b bis 3d dargestellten Lüftungskanäle 6 in einem Abstand zueinander vorgesehen sein.Due to the offset between the inlet opening 14 and the outlet opening 7, a labyrinth-like seal is achieved. Furthermore, it is advantageous if the outlet openings 7, as shown in the embodiments, as a short Incisions, so-called microcuts are formed, which achieved a total of a certain valve effect and the storage of the entry of undesirable substances, such as liquid or water vapor, can be prevented to some extent. Alternatively, however, can also be provided punch-outs, which are particularly useful when a largely free and direct exchange of air and in particular an entry of ambient air to be made possible. In order to make it possible to adapt to the respective requirements, provision may be made, for example, to change the length and width of the ventilation duct 6 and the size and arrangement of the inlet opening 14 and the outlet opening 7. Finally, on the longitudinal edge 4, several of the in the Fig. 3b to 3d shown ventilation ducts 6 may be provided at a distance from each other.

Fig. 4 zeigt einen Kaschierverbund zur Bildung eines erfindungsgemäßen Verpackungsbeutels, der als Seitenfaltenbeutel ausgeführt ist. Der Kaschierverbund umfasst eine Bahn der Beutelfolie 1 und eine weitere, darauf aufgelegte Folienbahn, welche bei den Folienverpackungsbeuteln die Innenfolie 8 bildet. Wie der Fig. 4 zu entnehmen ist, sind die Innenfolie 8 und die Beutelfolie 1 in streifenförmigen Bereichen 17 durch Klebstoff 10 miteinander kaschiert und zwischen diesen Bereichen 17 unverbunden. Vor der abschnittsweisen Kaschierung der Innenfolie 8 mit der Beutelfolie 1 werden in den Bereichen, die nicht mit der Beutelfolie 1 kaschiert werden, durch eine Nadelung Entlüftungsöffnungen 9 erzeugt. In der Fig. 4 ist des Weiteren angedeutet, dass bei der Bildung eines Folienschlauches, aus dem einzelne Folienverpackungsbeutel abgetrennt werden, die als Faltkanten ausgebildeten Längskanten 4 und die Längssigelnähte 5, 5' in den durch Klebstoff miteinander verbundenen Bereichen 17 erzeugt werden. Die Ränder des Kaschierverbundes werden dabei mittels einer durchgehenden Längssiegelnaht 5' an einer Längskante 4' verbunden. Fig. 4 shows a Kaschierverbund to form a packaging bag according to the invention, which is designed as a gusseted bag. The lamination composite comprises a web of the bag film 1 and a further film web applied thereon, which forms the inner film 8 in the film packaging bags. Again Fig. 4 can be seen, the inner film 8 and the bag film 1 are laminated in strip-shaped areas 17 by adhesive 10 together and unconnected between these areas 17. Before the sectional lamination of the inner film 8 with the bag film 1 are in the areas that are not laminated with the bag film 1, produced by a needling vent openings 9. In the Fig. 4 is further indicated that in the formation of a film tube, are separated from the individual film packaging bag, the fold edges formed as longitudinal edges 4 and the longitudinal sealing seams 5, 5 'in the interconnected by adhesive regions 17 are generated. The edges of the Kaschierverbundes be connected by means of a continuous longitudinal seam 5 'at a longitudinal edge 4'.

Claims (15)

  1. Film packaging bag, in particular for powdery, dusty filling material, comprising two opposing front surfaces (2) formed by a bag film (1) and defined by longitudinal edges (4, 4') and comprising at least one ventilation device, which comprises a ventilation channel (6) extending in the longitudinal direction, the ventilation device being arranged in the region of one of the longitudinal edges (4), which is formed as a folded edge, the ventilation channel (6) being defined by the folded edge and a longitudinal sealing seam (5), which separates the ventilation channel (6) from a filling space on the inside of the bag, and an interruption of the longitudinal sealing seam (5) forming an inlet opening (14) which opens into the filling space, relative to which an external outlet opening (7) of the ventilation channel (6) is arranged offset, characterised in that the ventilation channel (6) extends over part of the length of the associated longitudinal edge (4), the portion of the longitudinal sealing seam (5) laterally defining the ventilation channel (6) having a smaller thickness than a portion adjacent to the outlet opening (7) of the ventilation channel (6).
  2. Film packaging bag according to Claim 1, characterised in that the ventilation channel (6) comprises a plurality of outlet openings (7).
  3. Film packaging bag according to Claim 1 or 2, characterised in that lateral folds (3) are arranged between the front surfaces (2), the longitudinal edges (4, 4') being respectively formed between one of the lateral folds (3), on the one hand, and one of the front surfaces (2), on the other hand.
  4. Film packaging bag according to one of Claims 1 to 3, characterised in that on one of the longitudinal edges (4') a longitudinal sealing seam (5') is provided which joins edges of the bag film (1) together.
  5. Film packaging bag according to one of Claims 1 to 4, characterised in that the bag film (1) comprises an outer layer (12) made of polyester, preferably polyethylene terephthalate (PET), and a heat-sealable inner layer (13) made of polyolefin, preferably polyethylene (PE).
  6. Film packaging bag according to one of Claims 1 to 5, characterised in that on the inside of the bag an internal film (8) comprising ventilation openings (9) is provided which is only partially joined to the bag film (1), so that when filling the film packaging bag with a powdery, dusty filling material, the air forced out of the filling space is able to enter the regions between the inner film (8) and the bag film (1) through the ventilation openings (9) and is able to leave these regions through a filling opening on the top side.
  7. Film packaging bag according to Claim 6, characterised in that the bag film (1) and the inner film (8) are partially joined together by adhesive (10).
  8. Film packaging bag according to Claim 6 or 7, characterised in that the bag film (1) and the inner film (8) are joined together in the region of the longitudinal edges (4, 4'), the regions arranged therebetween being unjoined.
  9. Method for producing a film packaging bag, in particular a film packaging bag according to one of Claims 1 to 8,
    a web of a bag film (1) being folded, forming at least one folded edge,
    the edges of the bag film (1) being joined together in order to form a flattened film tube with two front surfaces (2),
    on the folded edge a longitudinal sealing seam (5) being formed with at least one interruption, so that at least partially between the longitudinal sealing seam (5) and the folded edge an unsealed channel-shaped portion extending in the longitudinal direction is produced,
    on the channel-shaped portion for forming a ventilation channel (6) at least one outlet opening (7) being produced and the longitudinal sealing seam (5) being formed directly on the folded edge, and the longitudinal sealing seam (5) having a recess on the edge starting from the interruption, whereby the channel-shaped unsealed portion formed by the recess is separated by a narrow partition wall (16) of the longitudinal sealing seam (5) from the interior of the film tube.
  10. Method according to Claim 9, lateral folds (3) which are arranged between the front surfaces (2) being formed when folding the film tube.
  11. Method according to Claim 9 or 10, the web of the bag film (1) being partially laminated before the folding process with a further film web provided with ventilation openings (9), the laminated connection being folded such that the further film web forms an inner film (8) of the film tube.
  12. Method according to Claim 11, the web of the bag film (1) and the further film web being laminated in the regions (17) in which longitudinal edges (4, 4') of the film tube are subsequently produced.
  13. Method according to Claim 9 or 10, a further film web provided with ventilation openings (9) being added to the web of the bag film (1), before the folding process, the bag film (1) and the further film web being joined by heat sealing, and the bag film being folded with the further film web, so that the further film web forms an inner film (8) of the film tube.
  14. Method according to one of Claims 11 to 13, the ventilation openings (9) being produced only in the regions which are not provided for joining to the bag film (1).
  15. Method according to one of Claims 11 to 14, the ventilation openings (9) being produced by needling and the further film web being joined to the web of the bag film (1) so that raised portions (11) formed during the needling process are arranged in the direction of the bag film (1).
EP08019911A 2008-11-14 2008-11-14 Film packaging bag, especially for powdery, dusty filling goods Active EP2186742B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT08019911T ATE495115T1 (en) 2008-11-14 2008-11-14 FILM PACKAGING BAGS, ESPECIALLY FOR POWDERY, DUSTY FILLING GOODS
EP08019911A EP2186742B1 (en) 2008-11-14 2008-11-14 Film packaging bag, especially for powdery, dusty filling goods
ES08019911T ES2354759T3 (en) 2008-11-14 2008-11-14 PACKAGING BAG MADE OF MOVIE MATERIAL, ESPECIALLY FOR A PULVERULENT LOADING PRODUCT THAT DISPOSES POWDER.
PL08019911T PL2186742T3 (en) 2008-11-14 2008-11-14 Film packaging bag, especially for powdery, dusty filling goods
DE502008002330T DE502008002330D1 (en) 2008-11-14 2008-11-14 Film packaging bags, in particular for powdery, dusty contents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08019911A EP2186742B1 (en) 2008-11-14 2008-11-14 Film packaging bag, especially for powdery, dusty filling goods

Publications (2)

Publication Number Publication Date
EP2186742A1 EP2186742A1 (en) 2010-05-19
EP2186742B1 true EP2186742B1 (en) 2011-01-12

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EP (1) EP2186742B1 (en)
AT (1) ATE495115T1 (en)
DE (1) DE502008002330D1 (en)
ES (1) ES2354759T3 (en)
PL (1) PL2186742T3 (en)

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JP2018519217A (en) 2015-06-29 2018-07-19 ダウ グローバル テクノロジーズ エルエルシー Process for making a flexible container with a microcapillary dispensing system
AR105131A1 (en) 2015-06-29 2017-09-06 Dow Global Technologies Llc FLEXIBLE BAG WITH MICROCAPILAR DISPENSATION SYSTEM
DE202017103128U1 (en) * 2017-05-23 2018-08-24 Bischof + Klein Se & Co. Kg Ventable valve bag
CN114906354B (en) * 2022-06-21 2023-06-02 高梵(浙江)信息技术有限公司 Continuous mould-proof down ball processing device

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PL2186742T3 (en) 2011-06-30
EP2186742A1 (en) 2010-05-19
ES2354759T3 (en) 2011-03-17
ATE495115T1 (en) 2011-01-15
DE502008002330D1 (en) 2011-02-24

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