EP3107816B1 - Bag - Google Patents

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Publication number
EP3107816B1
EP3107816B1 EP15717616.5A EP15717616A EP3107816B1 EP 3107816 B1 EP3107816 B1 EP 3107816B1 EP 15717616 A EP15717616 A EP 15717616A EP 3107816 B1 EP3107816 B1 EP 3107816B1
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EP
European Patent Office
Prior art keywords
bag
plastic film
paper layer
paper
layer
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.)
Active
Application number
EP15717616.5A
Other languages
German (de)
French (fr)
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EP3107816A1 (en
Inventor
Peter Hardemann
Fabio Rencurosi
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.)
Mondi AG
N Et B Knauf & Cie SCS
Original Assignee
Mondi AG
N Et B Knauf & Cie SCS
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.)
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Publication date
Application filed by Mondi AG, N Et B Knauf & Cie SCS filed Critical Mondi AG
Priority to PL15717616T priority Critical patent/PL3107816T3/en
Priority to RS20180923A priority patent/RS58473B1/en
Priority to SI201530350T priority patent/SI3107816T1/en
Publication of EP3107816A1 publication Critical patent/EP3107816A1/en
Application granted granted Critical
Publication of EP3107816B1 publication Critical patent/EP3107816B1/en
Priority to HRP20181262TT priority patent/HRP20181262T1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/04—Bags or like containers made of paper and having structural provision for thickness of contents with multiple walls
    • 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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/10—Bags or like containers made of paper and having structural provision for thickness of contents with gusseted sides
    • 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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/14—Valve bags, i.e. with valves for filling
    • 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 bag with a jacket wall formed from at least two layers each closed by a longitudinal adhesive seam to a tube with two front ends and with the bag at the front ends closed bottoms and with a filling opening for filling with a filling material, wherein the jacket wall at least one paper layer and the at least one paper layer at least predominantly determines the load-bearing capacity and the mechanical stability of the bag, wherein the outer wall has on its outer side a layer of a plastic film which protects the at least one paper layer from moisture and has splices in a region of overlapping ends between which exist ventilation paths.
  • the invention thus relates to a paper bag in which the at least one paper layer, which regularly consists of kraft paper, determines the statics of the bag.
  • the jacket wall may consist of a paper layer, but preferably also of two or more paper layers. It is also known to arrange a plastic film layer between the paper layers, in particular to form a vapor barrier for the filling material. As a result, for example, the escape of odors from the bag can be prevented.
  • plastic bags are therefore known. These consist of at least one plastic layer with a sufficient thickness for the desired stability and strength layer thickness of for example 100 microns. It is known to provide such a foil bag with slots to allow venting. In order to avoid the escape of filling material, it is known to line the foil bag on the inside with a creped filter paper layer which retains the contents in the bag interior in the region of the slots. Such a film bag is expensive to produce and has disadvantages in processing in the manufacturing process of the bag.
  • a multilayer bag which consists of a paper layer and a moisture-protecting plastic film as the outer layer.
  • a moisture-protecting plastic film as the outer layer.
  • the ends of the plastic film overlap and are provided in this area to allow venting with a dense pattern of perforation holes.
  • the gluing in the overlapping area can be interrupted in places.
  • the present invention is therefore the object of a paper bag in such a way that its disadvantages are avoided when exposed to moisture, oh-ne this on a film bag whose statics is determined by plastic films to fall back.
  • a bag of the type mentioned above is characterized in that the plastic film has a thickness of 60 microns or less, and also in the region of overlapping ends is free of perforations.
  • the paper bag according to the invention thus has on its outer side a thin plastic film, which protects the statics of the bag-determining paper layers from moisture.
  • the plastic film has a region of overlapping ends, in which it is glued closed with itself via a longitudinal adhesive seam to a hose.
  • the corresponding splices are provided with recesses so that there are ventilation paths between them.
  • the plastic film surrounding the paper bag is formed without perforations, in particular in the region of the overlapping ends of the plastic films in which the splices are located.
  • the bonding of the overlapping ends of the plastic film together can be done with a suitable adhesive application, but is also possible in another form, for example by local welding of the two ends together.
  • the plastic film on the outside of the jacket wall preferably has a thickness between 10 and 50 microns.
  • the plastic film is only selectively bonded to the underlying paper layer and therefore easily removable from the paper layer.
  • the advantage is achieved that the plastic film is separable from the paper layers.
  • the easy removability can also be used to remove any plastic film soiled during transport in order to be able to present the bag with an outer sizable paper layer, for example for a sale in a hardware store or the like.
  • the paper sheet located under the plastic film is printed.
  • the plastic film may in this case preferably be transparent, so that the printing on the paper layer is visible through the plastic film.
  • the plastic film may be formed from conventional film plastics. Preferred is the use of polyethylene.
  • the plastic film itself is printed, preferably on the facing to the underlying paper layer inside the transparent plastic film. This creates a brilliant print that is easy to read and presentable for sales purposes.
  • the only selective attachment of the plastic film to the underlying paper layer also has advantages for the venting of the bag, since the flow cross section for transporting the air is increased to the venting paths between the splices of the plastic film.
  • the plastic film may be provided with a tear-off, which may be formed by a weakening line, a protruding material bag o. ⁇ .
  • plastic film is also connected over its entire surface with the underlying paper layer.
  • plastic film is included in the folding of the floors.
  • the paper bag according to the invention is preferably formed with one or two kraft paper layers, although it is not excluded that at least one additional paper layer is used, in particular for considerable mechanical loads.
  • the paper layers preferably have a basis weight of 70 or 80 g / m 2 in a construction with several paper layers, while with a paper layer used a higher basis weight, for example of 120 g / m 2, may be expedient.
  • the paper types preferably have a TEA value (Tensile Energy Absorption) according to ISO 1924-3 in the machine direction of at least 100 J / m 2 for normal kraft paper grades, of at least 180 J / m 2 for "semi-extensible” kraft paper grades and of at least 240 for "extensible” kraft paper grades.
  • TEA value Tesile Energy Absorption
  • These kraft papers are commonly used for paper sacks to determine their statics and strength.
  • the additionally provided plastic film has no function influencing the static, but serves primarily to protect the paper layers from the effects of moisture.
  • the invention offers particular advantages when the bag has two folded bottoms, one of which is provided with a valve opening into which a flat lying, for the filling tubular tube for forming a filling channel aufbiegbares valve is inserted.
  • the valve forms a respect to the valve opening to the bag interior facing first end and a jacket wall facing the second end.
  • the moisture-protective formation of the bag by the plastic film surrounding the paper bag is effectively supplemented by the valve having a paper layer forming the first end which has at the second end a folded, a second film section and a second film section connected therewith via a fold line Foil layer is overlapped.
  • the bag exterior facing second end of the paper layer is overlapped by the plastic film and thus also protected from moisture.
  • the paper layer preferred for sealing is thus covered to the outside of the bag by the film layer and thus protected from moisture.
  • the film sections each extend over only a part of the length of the paper layer. It is also expedient if the film layer is wider than the paper layer, so the paper layer in the width direction, which is perpendicular to the longitudinal direction of the valve opening, projecting on both sides.
  • the valve formation is further improved in a manner known per se by inserting in the fold of the bottom in the region of the valve a reinforcing sheet of paper terminating at a distance from the second end of the valve.
  • the reinforcing sheet facilitates the bending of the bottom opening closed by the flat wall layers of the bag to a tubular valve opening.
  • the film layer has a thickness of 30 to 50 ⁇ m, preferably 40 ⁇ m.
  • the paper layer is preferably formed with a basis weight between 50 and 100 g / m 2 , preferably 80 g / m 2 .
  • FIG. 1 is only schematically illustrated the formation of the longitudinal adhesive seam in an overlapping region of the plastic film.
  • the splices K which line up here to form a longitudinal adhesive seam, are separated from each other by small gaps Z, can escape through the air from the bag interior to the outside, as illustrated by the arrows P in the drawing.
  • the small clouds shown in the drawing illustrate air or gas from the bag interior before passing through the spaces Z to the outside.
  • FIGS. 2 to 4 the construction of a folded bottom of a bag according to the invention is shown in a preferred embodiment.
  • the floor is designed as a cross floor and arises from the fact that the bag wall has been made as an open, flat-lying hose with two fold lines 1.
  • triangular pockets 2 are turned inwards and cut out so that bottom flaps 3 result, which are connected via fold lines 4 pivotally connected to the large side walls of the bag.
  • the bottom flaps 3 are folded perpendicular to the pockets 2, resulting in the formation of a cross bottom.
  • Figures 2 and 3 show a folded state of the soil in which the bottom flaps 3 are not yet folded.
  • a reinforcing sheet 5 of paper is glued to one of the pockets, which is to form a valve opening for an inserted valve, wherein the reinforcing sheet 5 extends laterally over the fold lines 4 slightly in the region of the bottom flaps 3 and is also glued there.
  • the reinforcing sheet 5 is preferably provided with a folded end 7 towards the bottom corner impact 6, so that the corresponding end of the reinforcing sheet 5 is reinforced in two-layered form.
  • the reinforcing sheet 7 is preferably made of a paper sheet having a basis weight between 20 and 40 g / m 2 , preferably 30 g / m 2 .
  • the material combination consists of a film layer 8 and a paper layer 9.
  • the film layer 8 is folded over a fold line 10 and thus has an upper first film section 11 and a lower second film section 12.
  • the film layer 8 formed in this way in the form of a lying V accommodates the paper layer 9 in that the first film section 11 engages over the upper side of the paper layer 9 and the second film section 12 over the underside of the paper layer 9.
  • the paper layer 9 also has reinforcing reasons a folded front end 13 which is inserted to the front end of the film layer 8.
  • the paper layer 9 is in the longitudinal direction of the Valve longer than the film layer 8 is formed, so that protrudes toward the bag interior, the paper layer 9 from the film layer 8.
  • the film layer 8 is formed perpendicular to the longitudinal direction of the valve wider than the paper layer 9. Both the film layer 8 and the paper layer 9 extend laterally over the fold lines 4 of the bottom flaps 3 and are thus folded with the bottom flaps 3 in the formation of the folded bottom to the fold lines 4.
  • valve assembly which in the longitudinal direction of the valve, ie in FIG. 3 directed outwardly, a first end 13 and an opposite, directed to the bag interior second end 14 has.
  • the first end 13 protrudes beyond the front edge of the reinforcing sheet 5 and covers the reinforcing sheet 5 completely in the non-open state of the valve opening, whereby it is protected against exposure to moisture.
  • the second end 14 is formed by the paper layer 9 and the reinforcing sheet 5, so that paper is sealed onto paper.
  • the film layer 8 extends only over a part of the paper layer 9, so that a substantial part of the length of the valve in the region of the second end 14 consists only of paper.
  • the length of the film layer 8 is preferably between 1/2 and 3/4 of the length of the paper layer 9.
  • FIG. 5 shows a side view of a filled bag, which has taken its box shape through the filling. Therefore, the typical fold lines that extend from the middle fold line 1 to the corners of the floor are recognizable.
  • Shown here is schematically the reinforcing sheet 15, the formed of film layer 8 and paper layer 9 valve with its folded up edge strips and the overlying bottom flaps 3, which form the bottom closure and possibly with a (not shown) bottom cover sheet are covered.
  • the valve opening is shown slightly open. The closure of the valve is usually carried out in that the bag is placed on the bottom formed with the valve, so that the filling material filled in the bag closes the valve by the paper layer 9 is pressed against the reinforcing sheet 5.

Description

Die Erfindung betrifft einen Sack mit einer aus wenigstens zwei jeweils mittels einer Längsklebenaht zu einem Schlauch geschlossenen Lagen gebildeten Mantelwandung mit zwei Stirnenden und mit den Sack an den Stirnenden verschließenden gefalteten Böden und mit einer Einfüllöffnung zur Befüllung mit einem Füllgut, wobei die Mantelwandung wenigstens eine Papierlage aufweist und die wenigstens eine Papierlage die Belastbarkeit mit Füllgewicht und die mechanische Stabilität des Sacks zumindest überwiegend bestimmt, wobei die Mantelwandung auf ihrer Außenseite eine Lage aus einer Kunststofffolie aufweist, die die wenigstens eine Papierlage vor Feuchte schützend umgibt und in einem Bereich überlappender Enden Klebestellen aufweist, zwischen denen Entlüftungswege bestehen.The invention relates to a bag with a jacket wall formed from at least two layers each closed by a longitudinal adhesive seam to a tube with two front ends and with the bag at the front ends closed bottoms and with a filling opening for filling with a filling material, wherein the jacket wall at least one paper layer and the at least one paper layer at least predominantly determines the load-bearing capacity and the mechanical stability of the bag, wherein the outer wall has on its outer side a layer of a plastic film which protects the at least one paper layer from moisture and has splices in a region of overlapping ends between which exist ventilation paths.

Die Erfindung betrifft somit einen Papiersack, bei dem die wenigstens eine Papierlage, die regelmäßig aus Kraftpapier besteht, die Statik des Sacks festlegt. Die Mantelwandung kann dabei aus einer Papierlage, vorzugsweise aber auch aus zwei oder mehreren Papierlagen bestehen. Es ist ferner bekannt, zwischen den Papierlagen eine Kunststofffolienlage anzuordnen, um insbesondere eine Dampfsperre für das Füllgut auszubilden. Dadurch kann beispielsweise das Austreten von Gerüchen aus dem Sack verhindert werden.The invention thus relates to a paper bag in which the at least one paper layer, which regularly consists of kraft paper, determines the statics of the bag. The jacket wall may consist of a paper layer, but preferably also of two or more paper layers. It is also known to arrange a plastic film layer between the paper layers, in particular to form a vapor barrier for the filling material. As a result, for example, the escape of odors from the bag can be prevented.

Das Befüllen des Sacks über die Einfüllöffnung mit Füllgut bringt regelmäßig auch einen Eintrag von Luft in das Sackinnere mit sich. Es sind daher verschiedene Maßnahmen ergriffen worden, die Entlüftung des Sacks bei oder nach der Befüllung zu möglichen, beispielsweise durch Füllröhren oder Ventilkonstruktionen, die eine Luftabführung bereits während des Befüllens erlauben. Während die Papierlagen den Luftaustritt, wenn auch langsam, ermöglichen, sind Kunststofflagen regelmäßig luftdicht. Für eine Entlüftung über die Mantelwandung müssen daher in den Kunststofflagen zumindest in lokalen Bereichen Perforationen oder siebähnliche Einsätze vorgesehen werden. Für Papiersäcke besteht das Problem, dass sich die Papierlagen mit Feuchte oder Nässe der Umgebung vollsaugen. Sie können daher an Stabilität verlieren und aufgrund der Anfälligkeit von feuchtem Papier für Verschmutzungen auch unansehnlich werden.The filling of the bag via the filling opening with contents regularly also brings an entry of air into the bag interior with it. There are therefore various measures have been taken, the venting of the bag during or after filling to possible, for example, by filling tubes or valve designs that allow air removal already during filling. While the paper layers allow the air to escape, albeit slowly, plastic layers are regularly airtight. For venting over the jacket wall perforations or sieve-like inserts must therefore be provided in the plastic layers at least in local areas. For paper sacks, there is the problem that the paper layers become saturated with moisture or moisture in the environment. They can therefore lose stability and also become unsightly due to the susceptibility of damp paper to soiling.

Als Alternative sind daher Kunststoffsäcke bekannt. Diese bestehen aus wenigstens einer Kunststofflage mit einer für die angestrebte Stabilität und Festigkeit ausreichenden Lagenstärke von beispielsweise 100 µm. Es ist bekannt, einen derartigen Foliensack mit Schlitzen zu versehen, um eine Entlüftung zu ermöglichen. Um dabei den Austritt von Füllgut zu vermeiden, ist es bekannt, den Foliensack auf der Innenseite mit einer gekreppten Filterpapierlage auszukleiden, die das Füllgut im Sackinnenraum im Bereich der Schlitze zurückhält. Ein derartiger Foliensack ist aufwendig in seiner Herstellung und weist Nachteile bei der Verarbeitung im Herstellungsprozess des Sacks auf.As an alternative, plastic bags are therefore known. These consist of at least one plastic layer with a sufficient thickness for the desired stability and strength layer thickness of for example 100 microns. It is known to provide such a foil bag with slots to allow venting. In order to avoid the escape of filling material, it is known to line the foil bag on the inside with a creped filter paper layer which retains the contents in the bag interior in the region of the slots. Such a film bag is expensive to produce and has disadvantages in processing in the manufacturing process of the bag.

Durch US 2007/0181459 A1 ist ein mehrlagiger Sack bekannt, der aus einer Papierlage und einer vor Feuchtigkeit schützenden Kunststofffolie als Außenlage besteht. Zur Bildung des Schlauchs mittels einer Längsklebenaht überlappen die Enden der Kunststofffolie und sind in diesem Bereich zur Ermöglichung der Entlüftung mit einem dichten Muster von Perforationslöchern versehen. Die Verklebung im überlappenden Bereich kann dabei stellenweise unterbrochen sein.By US 2007/0181459 A1 a multilayer bag is known which consists of a paper layer and a moisture-protecting plastic film as the outer layer. To form the tube by means of a longitudinal adhesive seam, the ends of the plastic film overlap and are provided in this area to allow venting with a dense pattern of perforation holes. The gluing in the overlapping area can be interrupted in places.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, einen Papiersack so auszubilden, dass seine Nachteile bei Feuchteeinwirkung vermieden werden, oh-ne hierfür auf einen Foliensack, dessen Statik durch Kunststofffolien bestimmt wird, zurückgreifen zu müssen.The present invention is therefore the object of a paper bag in such a way that its disadvantages are avoided when exposed to moisture, oh-ne this on a film bag whose statics is determined by plastic films to fall back.

Zur Lösung dieser Aufgabe ist erfindungsgemäß ein Sack der eingangs erwähnten Art dadurch gekennzeichnet, dass die Kunststofffolie eine Stärke von 60 µm oder weniger aufweist, und auch in dem Bereich überlappender Enden frei von Perforationen ist.To achieve this object, according to the invention a bag of the type mentioned above is characterized in that the plastic film has a thickness of 60 microns or less, and also in the region of overlapping ends is free of perforations.

Der erfindungsgemäße Papiersack weist somit auf seiner Außenseite eine dünne Kunststofffolie auf, die die die Statik des Sacks bestimmenden Papierlagen vor Feuchteeinffüssen schützt. Die Kunststofffolie weist einen Bereich überlappender Enden auf, in dem sie mit sich selbst über eine Längsklebenaht zu einem Schlauch geschlossen verklebt ist. Die entsprechenden Klebestellen sind jedoch mit Ausnehmungen versehen, sodass sich zwischen ihnen Entlüftungswege ergeben. Der Papiersack ist somit zwar durch eine umgebende Kunststofffolie gegen Feuchteeinflüsse geschützt, insbesondere Feuchteeinflüsse durch Wasserdampf, erlaubt dennoch eine Entlüftung, wie sie durch die Papierlagen gegeben ist.The paper bag according to the invention thus has on its outer side a thin plastic film, which protects the statics of the bag-determining paper layers from moisture. The plastic film has a region of overlapping ends, in which it is glued closed with itself via a longitudinal adhesive seam to a hose. However, the corresponding splices are provided with recesses so that there are ventilation paths between them. Although the paper bag is thus protected by a surrounding plastic film against moisture, especially moisture by water vapor, still allows venting, as given by the paper layers.

Die den Papiersack umgebende Kunststofffolie ist ohne Perforationen ausgebildet, insbesondere auch in dem Bereich der überlappendenden Enden der Kunststofffolien, in dem sich die Klebestellen befinden.The plastic film surrounding the paper bag is formed without perforations, in particular in the region of the overlapping ends of the plastic films in which the splices are located.

Die Verklebung der überlappenden Enden der Kunststofffolie miteinander kann mit einem geeigneten Klebstoffauftrag erfolgen, ist aber auch in anderer Form, beispielsweise durch lokale Verschweißungen der beiden Enden miteinander möglich.The bonding of the overlapping ends of the plastic film together can be done with a suitable adhesive application, but is also possible in another form, for example by local welding of the two ends together.

Die Kunststofffolie auf der Außenseite der Mantelwandung weist vorzugsweise eine Stärke zwischen 10 und 50 µm auf. Vorzugsweise ist die Kunststofffolie nur punktuell mit der darunter befindlichen Papierlage verklebt und daher leicht von der Papierlage entfernbar. Hierdurch wird der Vorteil erzielt, dass die Kunststofffolie von den Papierlagen trennbar ist. Dies ist für die Recyclebarkeit des Sackes nach seinem Gebrauch vorteilhaft. Die leichte Entfernbarkeit kann aber auch dazu verwendet werden, die ggf. beim Transport verschmutzte Kunststofffolie zu entfernen, um den Sack mit einer äußeren ansehnlichen Papierlage präsentieren zu können, beispielsweise für einen Abverkauf in einem Baumarkt oder ähnliches. In diesem Fall ist es zweckmäßig, wenn die unter der Kunststofffolie befindliche Papierlage bedruckt ist. Die Kunststofffolie kann in diesem Fall vorzugsweise transparent ausgebildet sein, sodass die Bedruckung auf der Papierlage durch die Kunststofffolie hindurch sichtbar ist. Die Kunststofffolie kann aus üblichen Folienkunststoffen gebildet sein. Bevorzugt ist die Verwendung von Polyethylen.The plastic film on the outside of the jacket wall preferably has a thickness between 10 and 50 microns. Preferably, the plastic film is only selectively bonded to the underlying paper layer and therefore easily removable from the paper layer. As a result, the advantage is achieved that the plastic film is separable from the paper layers. This is advantageous for the recyclability of the bag after its use. However, the easy removability can also be used to remove any plastic film soiled during transport in order to be able to present the bag with an outer sizable paper layer, for example for a sale in a hardware store or the like. In this case, it is expedient if the paper sheet located under the plastic film is printed. The plastic film may in this case preferably be transparent, so that the printing on the paper layer is visible through the plastic film. The plastic film may be formed from conventional film plastics. Preferred is the use of polyethylene.

In einer anderen Ausführungsform der Erfindung ist die Kunststofffolie selbst bedruckt, vorzugsweise auf der zur darunterliegenden Papierlage zeigenden Innenseite der transparent ausgebildeten Kunststofffolie. Hierdurch entsteht eine brillante Bedruckung, die gut lesbar und für Verkaufszwecke präsentierbar ist.In another embodiment of the invention, the plastic film itself is printed, preferably on the facing to the underlying paper layer inside the transparent plastic film. This creates a brilliant print that is easy to read and presentable for sales purposes.

In allen Fällen, in denen eine transparente Kunststofffolie verwendet wird, ist es zweckmäßig, zumindest die darunterliegende Papierlage mit gebleichtem Papier auszubilden. Dadurch werden störende Reflektionen vermieden, wie sie bei einem durch ungebleichtes Kraftpapier entstehenden dunklen Hintergrund auftreten würden.In all cases in which a transparent plastic film is used, it is expedient to form at least the underlying paper layer with bleached paper. This avoids annoying reflections that would occur in a dark background caused by unbleached kraft paper.

Die nur punktuelle Befestigung der Kunststofffolie an der darunter befindlichen Papierlage hat ferner Vorteile für die Entlüftung des Sacks, da der Strömungsquerschnitt zum Transport der Luft zu den Entlüftungswegen zwischen den Klebestellen der Kunststofffolie vergrößert wird.The only selective attachment of the plastic film to the underlying paper layer also has advantages for the venting of the bag, since the flow cross section for transporting the air is increased to the venting paths between the splices of the plastic film.

Zum Entfernen der Kunststofffolie von der darunterliegenden Papierlage kann die Kunststofffolie mit einer Abreißhilfe versehen sein, die durch eine Schwächungslinie, eine überstehende Materiallasche o. ä. gebildet sein kann.To remove the plastic film from the underlying paper layer, the plastic film may be provided with a tear-off, which may be formed by a weakening line, a protruding material bag o. Ä.

Durch die Erfindung ist es nicht ausgeschlossen, dass die Kunststofffolie auch vollflächig mit der darunter befindlichen Papierlage verbunden ist.By the invention it is not excluded that the plastic film is also connected over its entire surface with the underlying paper layer.

Zur Sicherstellung der Schutzfunktion der Kunststofffolie vor Feuchteeinwirkungen ist es zweckmäßig, wenn die Kunststofffolie in die Faltung der Böden einbezogen ist.To ensure the protective function of the plastic film against the effects of moisture, it is expedient if the plastic film is included in the folding of the floors.

Der erfindungsgemäße Papiersack wird vorzugsweise mit einer oder mit zwei Kraftpapierlagen gebildet, obwohl es nicht ausgeschlossen ist, dass insbesondere für erhebliche mechanische Belastungen auch wenigstens eine zusätzliche Papierlage verwendet wird. Die Papierlagen haben vorzugsweise bei einem Aufbau mit mehreren Papierlagen ein Flächengewicht von 70 oder 80 g/m2, während bei einer verwendeten Papierlage ein höheres Flächengewicht, beispielsweise von 120 g/m2 sinnvoll sein kann. Die Papiersorten weisen bevorzugt einen TEA-Wert (Tensile Energy Absorption) gemäß ISO 1924-3 in Maschinenrichtung von wenigstens 100 J/m2 für normale Kraftpapiersorten, von wenigstens 180 J/m2 für "semi extensible" Kraftpapiersorten und von wenigstens 240 für "extensible" Kraftpapiersorten auf. Diese Kraftpapiersorten werden üblicherweise für Papiersäcke verwendet, um deren Statik und Festigkeit zu bestimmen. Die zusätzlich vorgesehene Kunststofffolie hat demgegenüber keine die Statik beeinflussende Funktion, sondern dient vornehmlich dem Schutz der Papierlagen vor Feuchteeinwirkungen.The paper bag according to the invention is preferably formed with one or two kraft paper layers, although it is not excluded that at least one additional paper layer is used, in particular for considerable mechanical loads. The paper layers preferably have a basis weight of 70 or 80 g / m 2 in a construction with several paper layers, while with a paper layer used a higher basis weight, for example of 120 g / m 2, may be expedient. The paper types preferably have a TEA value (Tensile Energy Absorption) according to ISO 1924-3 in the machine direction of at least 100 J / m 2 for normal kraft paper grades, of at least 180 J / m 2 for "semi-extensible" kraft paper grades and of at least 240 for "extensible" kraft paper grades. These kraft papers are commonly used for paper sacks to determine their statics and strength. In contrast, the additionally provided plastic film has no function influencing the static, but serves primarily to protect the paper layers from the effects of moisture.

Die Bildung eines erfindungsgemäßen Papiersacks aus einer schlauchförmigen Mantelwandung mit gefalteten Böden, insbesondere Kreuzböden oder Klotz- oder Blockböden, erfolgt in herkömmlicher Weise und wird daher hier nicht näher beschrieben.The formation of a paper bag according to the invention from a tubular jacket wall with folded bottoms, in particular cross bottoms or block or block bottoms, takes place in a conventional manner and will therefore not be described in more detail here.

Die Erfindung bietet besondere Vorteile, wenn der Sack zwei gefaltete Böden aufweist, von denen einer mit einer Ventilöffnung versehen ist, in die ein flachliegendes, für den Einfüllvorgang rohrförmig zur Ausbildung eines Einfüllkanals aufbiegbares Ventil eingelegt ist. Das Ventil bildet dabei ein bezüglich der Ventilöffnung zum Sackinnern zeigendes erstes Ende und ein zur Mantelwandung zeigendes zweites Ende auf. Die vor Feuchteeinwirkung schützende Ausbildung des Sacks durch die den Papiersack umgebende Kunststofffolie wird wirkungsvoll dadurch ergänzt, dass das Ventil eine das erste Ende bildende Papierlage aufweist, die am zweiten Ende von einer umgefalteten, einen ersten Folienabschnitt und einen damit über eine Faltlinie verbundenen zweiten Folienabschnitt aufweisende Folienlage übergriffen ist. Damit ist das zum Sackäußeren zeigende zweite Ende der Papierlage durch die Kunststofffolie übergriffen und somit ebenfalls vor Feuchteeinwirkung geschützt. Dennoch wird am ersten Ende des Ventils von der unter dem Druck des Füllguts gut abdichtenden Wirkung der Papierlagen eines Ventils Gebrauch gemacht. Die zur Abdichtung bevorzugte Papierlage ist somit zum Sackäußeren hin durch die Folienlage abgedeckt und somit vor Feuchteeinwirkung geschützt. Um die abdichtende Wirkung der Papierlage für den Ventilsack gut ausnutzen zu können, ist vorgesehen, dass sich die Folienabschnitte jeweils nur über einen Teil der Länge der Papierlage erstrecken. Dabei ist es ferner zweckmäßig, wenn die Folienlage breiter als die Papierlage ist, also die Papierlage in Breitenrichtung, die senkrecht zur Längsrichtung der Ventilöffnung steht, beidseitig überragt.The invention offers particular advantages when the bag has two folded bottoms, one of which is provided with a valve opening into which a flat lying, for the filling tubular tube for forming a filling channel aufbiegbares valve is inserted. The valve forms a respect to the valve opening to the bag interior facing first end and a jacket wall facing the second end. The moisture-protective formation of the bag by the plastic film surrounding the paper bag is effectively supplemented by the valve having a paper layer forming the first end which has at the second end a folded, a second film section and a second film section connected therewith via a fold line Foil layer is overlapped. Thus, the bag exterior facing second end of the paper layer is overlapped by the plastic film and thus also protected from moisture. Nevertheless, use is made at the first end of the valve of the well-sealed under the pressure of the filling material effect of the paper layers of a valve. The paper layer preferred for sealing is thus covered to the outside of the bag by the film layer and thus protected from moisture. In order to make good use of the sealing effect of the paper layer for the valve bag, it is provided that the film sections each extend over only a part of the length of the paper layer. It is also expedient if the film layer is wider than the paper layer, so the paper layer in the width direction, which is perpendicular to the longitudinal direction of the valve opening, projecting on both sides.

Die Ventilausbildung wird in an sich bekannter Weise noch dadurch verbessert, dass in die Faltung des Bodens im Bereich des Ventils ein mit Abstand von dem zweiten Ende des Ventils endendes Verstärkungsblatt aus Papier eingesetzt ist. Das Verstärkungsblatt erleichtert das Aufbiegen der durch die flachliegenden Wandungslagen des Sacks geschlossenen Bodenöffnung zu einer rohrförmigen Ventilöffnung.The valve formation is further improved in a manner known per se by inserting in the fold of the bottom in the region of the valve a reinforcing sheet of paper terminating at a distance from the second end of the valve. The reinforcing sheet facilitates the bending of the bottom opening closed by the flat wall layers of the bag to a tubular valve opening.

In einer bevorzugten Ausführungsform weist die Folienlage eine Stärke von 30 bis 50 µm, vorzugsweise 40 µm auf. Die Papierlage ist vorzugsweise mit einem Flächengewicht zwischen 50 und 100 g/m2, vorzugsweise 80 g/m2, ausgebildet. Im Einzelfall ist es aber auch denkbar, die Folienlage in der angegebenen Stärke mit einer Papierlage mit einem anderen Flächengewicht oder eine Papierlage mit dem angegebenen Flächengewicht mit einer Folienlage einer anderen Stärke zu kombinieren.In a preferred embodiment, the film layer has a thickness of 30 to 50 μm, preferably 40 μm. The paper layer is preferably formed with a basis weight between 50 and 100 g / m 2 , preferably 80 g / m 2 . In individual cases, it is also conceivable to combine the film layer in the specified thickness with a paper layer with a different basis weight or a paper layer with the specified basis weight with a film layer of a different thickness.

Die Erfindung soll im Folgenden anhand von in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert werden. Es zeigen:

Figur 1
eine lediglich schematische Darstellung der Ausbildung einer Längsklebenaht in einem überlappenden Bereich der Kunststofffolie;
Figur 2
ein durch Bodeneckeinschläge teilweise gefalteter Kreuzboden mit offenen Bodenklappen und der Positionierung eines Verstärkungsblatts für die Ventilöffnung;
Figur 3
den Kreuzboden in der Darstellung der Figur 2 mit der Positionierung eines Ventils aus einer Papierlage und einer die Papierlage an einem Ende übergreifenden Folienlage;
Figur 4
eine perspektivische Darstellung des Bodens gemäß Figur 2 und 3 in explodierter Darstellung mit dem Verstärkungsblatt und dem einzusetzenden Ventil, gebildet aus der Papierlage und der Folienlage;
Figur 5
eine Seitenansicht eines erfindungsgemäßen Sacks mit zu Darstellungszwecken leicht geöffneter Ventilöffnung mit dem Verstärkungsblatt und dem eingesetzten Ventil.
The invention will be explained in more detail below with reference to exemplary embodiments illustrated in the drawing. Show it:
FIG. 1
a merely schematic representation of the formation of a longitudinal adhesive seam in an overlapping region of the plastic film;
FIG. 2
a bottom panel partially folded cross bottom with open bottom flaps and the positioning of a reinforcement sheet for the valve opening;
FIG. 3
the cross bottom in the representation of the FIG. 2 with the positioning of a valve made of a paper layer and a film layer overlapping the paper layer at one end;
FIG. 4
a perspective view of the soil according to FIG. 2 and 3 in an exploded view with the reinforcing sheet and the valve to be inserted, formed from the paper layer and the film layer;
FIG. 5
a side view of a bag according to the invention with slightly open for illustration purposes valve opening with the reinforcing sheet and the valve used.

In Figur 1 ist lediglich schematisch die Ausbildung der Längsklebenaht in einem überlappenden Bereich der Kunststofffolie dargestellt. Die Klebestellen K, die sich hier streifenförmig zu einer Längsklebenaht aneinander reihen, sind durch kleine Zwischenräume Z voneinander getrennt, durch die Luft aus dem Sackinneren nach außen austreten kann, wie dies anhand der Pfeile P in der Zeichnung verdeutlicht ist. Die in der Zeichnung dargestellten Wölkchen verdeutlichen Luft oder Gas aus dem Sackinneren vor dem Durchtritt durch die Zwischenräume Z nach außen.In FIG. 1 is only schematically illustrated the formation of the longitudinal adhesive seam in an overlapping region of the plastic film. The splices K, which line up here to form a longitudinal adhesive seam, are separated from each other by small gaps Z, can escape through the air from the bag interior to the outside, as illustrated by the arrows P in the drawing. The small clouds shown in the drawing illustrate air or gas from the bag interior before passing through the spaces Z to the outside.

Selbstverständlich sind auch andere Klebstellenmuster, die sich beispielsweise nicht linear, sondern in dem Überlappungsstreifen flächig erstrecken, für die Ausübung der Erfindung geeignet.Of course, other splice pattern, for example, non-linear, but extend in the overlap strip area, suitable for the practice of the invention.

In Figuren 2 bis 4 ist der Aufbau eines gefalteten Bodens eines erfindungsgemäßen Sacks in einer bevorzugten Ausführungsform dargestellt. Der Boden ist als Kreuzboden ausgeführt und entsteht dadurch, dass die Sackwandung als offener, flachliegender Schlauch mit zwei Faltlinien 1 hergestellt worden ist. Von den Faltlinien 1 ausgehend sind dreieckförmige Taschen 2 nach innen eingeschlagen und so ausgeschnitten, dass sich Bodenklappen 3 ergeben, die über Falzlinien 4 schwenkbar mit den großen Seitenwänden des Sacks verbunden sind. Die Bodenklappen 3 werden senkrecht zu den Taschen 2 eingeklappt, woraus sich die Ausbildung als Kreuzboden ergibt.In FIGS. 2 to 4 the construction of a folded bottom of a bag according to the invention is shown in a preferred embodiment. The floor is designed as a cross floor and arises from the fact that the bag wall has been made as an open, flat-lying hose with two fold lines 1. Starting from the fold lines 1 triangular pockets 2 are turned inwards and cut out so that bottom flaps 3 result, which are connected via fold lines 4 pivotally connected to the large side walls of the bag. The bottom flaps 3 are folded perpendicular to the pockets 2, resulting in the formation of a cross bottom.

Figuren 2 und 3 zeigen einen Faltzustand des Bodens, in dem die Bodenklappen 3 noch nicht eingeklappt sind. Gemäß Figur 2 wird ein Verstärkungsblatt 5 aus Papier auf eine der Taschen, die eine Ventilöffnung für ein eingelegtes Ventil bilden soll, aufgeklebt, wobei sich das Verstärkungsblatt 5 seitlich über die Falzlinien 4 etwas in den Bereich der Bodenklappen 3 erstreckt und auch dort verklebt wird. Das Verstärkungsblatt 5 ist vorzugsweise zum Bodeneckeinschlag 6 hin mit einem umgeschlagenen Ende 7 versehen, sodass das entsprechende Ende des Verstärkungsblatts 5 in zweilagiger Form verstärkt ausgebildet ist. Beim späteren Umklappen der Bodenklappen zur Bildung des Kreuzbodens wird der jeweilige sich auf den Bodenklappen 3 befindliche Randstreifen des Verstärkungsblatts 7 mit umgeklappt. Das Verstärkungsblatt 7 besteht vorzugsweise aus einer Papierlage mit einem Flächengewicht zwischen 20 und 40 g/m2, vorzugsweise 30 g/m2. Figures 2 and 3 show a folded state of the soil in which the bottom flaps 3 are not yet folded. According to FIG. 2 a reinforcing sheet 5 of paper is glued to one of the pockets, which is to form a valve opening for an inserted valve, wherein the reinforcing sheet 5 extends laterally over the fold lines 4 slightly in the region of the bottom flaps 3 and is also glued there. The reinforcing sheet 5 is preferably provided with a folded end 7 towards the bottom corner impact 6, so that the corresponding end of the reinforcing sheet 5 is reinforced in two-layered form. When later folding the bottom flaps to form the cross base of the respective located on the bottom flaps 3 edge strip of the reinforcing sheet 7 is also folded. The reinforcing sheet 7 is preferably made of a paper sheet having a basis weight between 20 and 40 g / m 2 , preferably 30 g / m 2 .

Auf die gemäß Figur 2 erstellte Anordnung wird nun gemäß Figur 3 eine Materialkombination zur Ausbildung eines Ventils aufgebracht. Die Materialkombination besteht aus einer Folienlage 8 und einer Papierlage 9. Die Folienlage 8 ist um eine Faltlinie 10 umgeschlagen und weist somit einen oberen ersten Folienabschnitt 11 und einen unteren zweiten Folienabschnitt 12 auf. Die auf diese Weise in Form eines liegenden V ausgebildete Folienlage 8 nimmt die Papierlage 9 auf, indem der erste Folienabschnitt 11 die Oberseite der Papierlage 9 und der zweite Folienabschnitt 12 die Unterseite der Papierlage 9 übergreift. Die Papierlage 9 weist ebenfalls aus Verstärkungsgründen ein umgeschlagenes vorderes Ende 13 auf, das bis zum vorderen Ende der Folienlage 8 eingeschoben wird. Die Papierlage 9 ist in Längsrichtung des Ventils länger als die Folienlage 8 ausgebildet, sodass zum Sackinneren hin die Papierlage 9 aus der Folienlage 8 herausragt. Die Folienlage 8 ist senkrecht zur Längsrichtung des Ventils breiter als die Papierlage 9 ausgebildet. Sowohl die Folienlage 8 als auch die Papierlage 9 erstrecken sich seitlich über die Falzlinien 4 der Bodenklappen 3 und werden somit mit den Bodenklappen 3 bei der Bildung des gefalteten Bodens um die Falzlinien 4 eingeklappt.On according to FIG. 2 created arrangement is now according to FIG. 3 applied a combination of materials to form a valve. The material combination consists of a film layer 8 and a paper layer 9. The film layer 8 is folded over a fold line 10 and thus has an upper first film section 11 and a lower second film section 12. The film layer 8 formed in this way in the form of a lying V accommodates the paper layer 9 in that the first film section 11 engages over the upper side of the paper layer 9 and the second film section 12 over the underside of the paper layer 9. The paper layer 9 also has reinforcing reasons a folded front end 13 which is inserted to the front end of the film layer 8. The paper layer 9 is in the longitudinal direction of the Valve longer than the film layer 8 is formed, so that protrudes toward the bag interior, the paper layer 9 from the film layer 8. The film layer 8 is formed perpendicular to the longitudinal direction of the valve wider than the paper layer 9. Both the film layer 8 and the paper layer 9 extend laterally over the fold lines 4 of the bottom flaps 3 and are thus folded with the bottom flaps 3 in the formation of the folded bottom to the fold lines 4.

Es bildet sich somit eine Ventilanordnung, die in Längsrichtung des Ventils, also in Figur 3 nach außen gerichtet, ein erstes Ende 13 und ein gegenüberliegendes, zum Sackinnern gerichtetes zweites Ende 14 aufweist.It thus forms a valve assembly which in the longitudinal direction of the valve, ie in FIG. 3 directed outwardly, a first end 13 and an opposite, directed to the bag interior second end 14 has.

Das erste Ende 13 steht dabei über die Vorderkante des Verstärkungsblatts 5 hervor und deckt im nicht geöffneten Zustand der Ventilöffnung das Verstärkungsblatt 5 vollständig ab, wodurch dieses gegen Feuchteeinwirkung geschützt ist. Das zweite Ende 14 wird durch die Papierlage 9 und das Verstärkungsblatt 5 gebildet, sodass eine Abdichtung Papier auf Papier erfolgt. Die Folienlage 8 erstreckt sich nur über einen Teil der Papierlage 9, sodass ein wesentlicher Teil der Länge des Ventils im Bereich des zweiten Endes 14 nur aus Papier besteht. Die Länge der Folienlage 8 beträgt vorzugsweise zwischen 1/2 und 3/4 der Länge der Papierlage 9.The first end 13 protrudes beyond the front edge of the reinforcing sheet 5 and covers the reinforcing sheet 5 completely in the non-open state of the valve opening, whereby it is protected against exposure to moisture. The second end 14 is formed by the paper layer 9 and the reinforcing sheet 5, so that paper is sealed onto paper. The film layer 8 extends only over a part of the paper layer 9, so that a substantial part of the length of the valve in the region of the second end 14 consists only of paper. The length of the film layer 8 is preferably between 1/2 and 3/4 of the length of the paper layer 9.

Figur 5 zeigt eine Seitenansicht eines gefüllten Sacks, der durch die Füllung seine Kastenform eingenommen hat. Erkennbar sind daher die typischen Faltlinien, die von der mittleren Faltlinie 1 bis zu den Ecken des Bodens ausgehen. Dargestellt ist hier schematisch das Verstärkungsblatt 15, das aus Folienlage 8 und Papierlage 9 gebildete Ventil mit seinen nach oben umgeklappten Randstreifen und die darüber befindlichen Bodenklappen 3, die den Bodenverschluss bilden und ggf. mit einem (nicht dargestellten) Bodendeckblatt abgedeckt sind. Zur Erkennbarkeit der Lagen des Verstärkungsblatts 5, des Ventils 8, 9 sowie der umgeklappten Randstreifen ist die Ventilöffnung etwas geöffnet dargestellt. Der Verschluss des Ventils erfolgt in üblicherweise dadurch, dass der Sack auf den mit dem Ventil ausgebildeten Boden gestellt wird, sodass das in den Sack eingefüllte Füllgut das Ventil verschließt, indem die Papierlage 9 gegen das Verstärkungsblatt 5 gedrückt wird. FIG. 5 shows a side view of a filled bag, which has taken its box shape through the filling. Therefore, the typical fold lines that extend from the middle fold line 1 to the corners of the floor are recognizable. Shown here is schematically the reinforcing sheet 15, the formed of film layer 8 and paper layer 9 valve with its folded up edge strips and the overlying bottom flaps 3, which form the bottom closure and possibly with a (not shown) bottom cover sheet are covered. For recognizability of the layers of the reinforcing sheet 5, the valve 8, 9 and the folded edge strips, the valve opening is shown slightly open. The closure of the valve is usually carried out in that the bag is placed on the bottom formed with the valve, so that the filling material filled in the bag closes the valve by the paper layer 9 is pressed against the reinforcing sheet 5.

Claims (14)

  1. A bag with a jacket wall composed of at least two layers closed in each case by means of a longitudinal adhesive seam to form a tube and having two front ends, and with folded bottoms closing the bag at the front ends, and with a filling opening for introducing a filling material, wherein the jacket wall has at least one paper layer and the at least one paper layer at least largely determines the load-bearing capability with filled weight and the mechanical stability of the bag, wherein the jacket wall has, on its outside, a layer of a plastic film which surrounds the at least one paper layer and protects it from moisture and, in an area of overlapping ends, has adhesion points (K) between which air removal paths (Z) are formed wherein the plastic film has a thickness of 60 µm or less, characterized in that the plastic film is free of perforations in the area of overlapping ends.
  2. The bag as claimed in claim 1, characterized in that the plastic film has a thickness of between 10 and 50 µm.
  3. The bag as claimed in claim 1 or 2, characterized in that the plastic film is affixed to the underlying paper layer only at points and is therefore easily removable from the paper layer.
  4. The bag as claimed in one of claims 1 through 3, characterized in that the plastic film is transparent.
  5. The bag as claimed in one of claims 1 through 4, characterized in that the plastic film is made of polyethylene.
  6. The bag as claimed in one of claims 1 through 5, characterized in that the paper layer located under the plastic film is made of bleached paper.
  7. The bag as claimed in one of claims 4 through 6, characterized in that the plastic film is printed on its inside facing toward the underlying paper layer.
  8. The bag as claimed in one of claims 3 through 7, characterized in that the plastic film is provided with a tear-open aid facilitating the removal from the jacket wall.
  9. The bag as claimed in one of claims 1 through 8, characterized in that the plastic film is incorporated into the folding of the bottoms.
  10. The bag as claimed in one of claims 1 through 9, characterized in that it has two folded bottoms, of which one is provided with a valve opening into which a flat valve is inserted which can be bent open in the shape of a tube to form a filling channel for the filling procedure and which has a first end (13) facing toward the bag interior with respect to the valve opening and a second end (14) facing toward the jacket wall, in that the valve has a paper layer (9) which forms the first end (13) and which at the second end (14) is overlapped by a folded film layer (8) having a first film portion (11) and a second film portion (12) connected to the latter via a fold line (10).
  11. The bag as claimed in claim 10, characterized in that the film portions (11, 12) each extend over only part of the length of the paper layer (9).
  12. The bag as claimed in claim 10 or 11, characterized in that the film layer (8) is wider than the paper layer (9).
  13. The bag as claimed in one of claims 10 through 12, characterized in that a reinforcement sheet (5) made of paper, and ending at a distance from the second end (14) of the valve, is inserted into the folding of the bottom in the area of the valve.
  14. The bag as claimed in one of claims 10 through 13, characterized in that the film layer (8) has a thickness of 30 to 50 µm and the paper layer (9) has a grammage of between 50 and 100 g/m2.
EP15717616.5A 2014-02-20 2015-02-19 Bag Active EP3107816B1 (en)

Priority Applications (4)

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PL15717616T PL3107816T3 (en) 2014-02-20 2015-02-19 Bag
RS20180923A RS58473B1 (en) 2014-02-20 2015-02-19 Bag
SI201530350T SI3107816T1 (en) 2014-02-20 2015-02-19 Bag
HRP20181262TT HRP20181262T1 (en) 2014-02-20 2018-08-02 Bag

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DE102014002411.3A DE102014002411A1 (en) 2014-02-20 2014-02-20 bag
PCT/IB2015/000419 WO2015125018A1 (en) 2014-02-20 2015-02-19 Bag

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EP3107816B1 true EP3107816B1 (en) 2018-05-09

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US (1) US9873553B2 (en)
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JP (1) JP6509891B2 (en)
DE (1) DE102014002411A1 (en)
DK (1) DK3107816T3 (en)
ES (1) ES2683521T3 (en)
HR (1) HRP20181262T1 (en)
HU (1) HUE041682T2 (en)
MX (1) MX369269B (en)
MY (1) MY179004A (en)
NO (1) NO2768978T3 (en)
PL (1) PL3107816T3 (en)
RS (1) RS58473B1 (en)
RU (1) RU2682428C2 (en)
SI (1) SI3107816T1 (en)
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WO (1) WO2015125018A1 (en)

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SI3107816T1 (en) 2019-03-29
EP3107816A1 (en) 2016-12-28
WO2015125018A1 (en) 2015-08-27
DE102014002411A1 (en) 2015-08-20
MX369269B (en) 2019-11-04
UA120430C2 (en) 2019-12-10
JP2017507088A (en) 2017-03-16
MY179004A (en) 2020-10-26
MX2016010630A (en) 2017-05-30
US9873553B2 (en) 2018-01-23
RU2682428C2 (en) 2019-03-19
JP6509891B2 (en) 2019-05-08
HRP20181262T1 (en) 2019-04-05
NO2768978T3 (en) 2018-04-21
RU2016137317A3 (en) 2018-08-30
DK3107816T3 (en) 2018-08-13
US20170057698A1 (en) 2017-03-02
PL3107816T3 (en) 2018-12-31
HUE041682T2 (en) 2019-05-28
RU2016137317A (en) 2018-03-21
ES2683521T3 (en) 2018-09-26
RS58473B1 (en) 2019-04-30

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