EP3107816A1 - Bag - Google Patents

Bag

Info

Publication number
EP3107816A1
EP3107816A1 EP15717616.5A EP15717616A EP3107816A1 EP 3107816 A1 EP3107816 A1 EP 3107816A1 EP 15717616 A EP15717616 A EP 15717616A EP 3107816 A1 EP3107816 A1 EP 3107816A1
Authority
EP
European Patent Office
Prior art keywords
paper layer
plastic film
paper
bag
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.)
Granted
Application number
EP15717616.5A
Other languages
German (de)
French (fr)
Other versions
EP3107816B1 (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 S C S
N Et B Knauf & Cie SCS
Original Assignee
Mondi AG
N ET B KNAUF & CIE S C S
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.)
Filing date
Publication date
Application filed by Mondi AG, N ET B KNAUF & CIE S C S, N Et B Knauf & Cie SCS filed Critical Mondi AG
Priority to PL15717616T priority Critical patent/PL3107816T3/en
Priority to SI201530350T priority patent/SI3107816T1/en
Priority to RS20180923A priority patent/RS58473B1/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

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • 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 having 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 closed at the front ends folded bottoms and with a filling opening for filling with a filling, wherein the mantle wall has at least one paper layer and the at least one paper layer at least predominantly determines the capacity with filling weight and the mechanical stability of the bag.
  • 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.
  • 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 sack of the type mentioned in the introduction is characterized in that the outer wall has on its outer side a layer of a plastic film having a thickness of 60 .mu.m or less, which protectively surrounds the at least one paper layer from moisture and in one Overlapping ends has splices between which there are ventilation paths.
  • 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 an area of overlapping ends in which it is carried itself glued closed 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 in a particularly preferred embodiment without perforations, especially in the region of the overlapping ends of the plastic films in which the splices are located.
  • the adhesive bonding of the overlapping ends of the plastic film with one another can take place with a suitable application of adhesive, but is also possible in another form, for example by local welding of the two ends to one another.
  • the plastic film on the outside of the jacket wall preferably has a thickness of between 10 and 50 ⁇ m.
  • 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 can be formed of conventional film plastics. Preferred is the use of polyethylene.
  • the plastic film itself is printed, preferably on the inside of the transparent plastic film facing the underlying paper layer. This creates a brilliant print that is easy to read and presentable for sales purposes.
  • the 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 to the venting paths between the splices of the plastic film is enlarged.
  • 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.
  • 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 the case of a construction with a plurality of paper layers, while with a paper layer used a higher basis weight, for example of 120 g / m 2, may be expedient.
  • the paper grades preferably have a TEA (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 at least 240 for " extensible "kraft paper types.
  • TEA 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 valve, which can be bent tubular to form a filling channel for the filling process, is inserted.
  • the valve forms a first end pointing in relation to the valve opening to the interior of the bag and a second end pointing to the jacket wall.
  • the protection of the bag against moisture formation by the plastic film surrounding the paper bag is effectively supplemented by the fact that the valve has a paper layer forming the first end which folds over at the second end. teten, a first film portion and a thus connected via a fold line second film section having film layer is overlapped.
  • the second end of the paper layer facing the outer side of the bag is overlapped by the plastic film and thus also protected against exposure to moisture.
  • the paper layer which is preferred for sealing is therefore covered by the film layer towards the exterior of the bag and thus protected against exposure to 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 ⁇ , preferably 40 ⁇ on.
  • the paper layer is preferably formed with a basis weight between 50 and 100 g / m 2 , preferably 80 g / m 2 .
  • Figure 1 is a merely schematic representation of the formation of a longitudinal adhesive seam in an overlapping region of the plastic film
  • Figure 2 is a partially folded by Bodeneneckeinaki
  • FIG. 3 shows the cross bottom in the representation of Figure 2 with the
  • Figure 4 is a perspective view of the bottom according to Figure 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;
  • Figure 5 is 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.
  • FIG. 1 shows only schematically 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.
  • other splice pattern for example, non-linear, but extend in the overlap strip area, suitable for the practice of the invention.
  • Figures 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.
  • 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 somewhat in the region of the bottom flaps 3 and is also glued there.
  • the reinforcing sheet 5 is preferably provided with a folded-over end 7 towards the bottom corner impact 6 so that the corresponding end of the reinforcing sheet 5 is reinforced in two-layered form.
  • edge strip of the reinforcing sheet 7 is also folded.
  • the reinforcing sheet 7 preferably consists of a paper layer having a basis weight between 20 and 40 g / m 2 , preferably 30 g / m 2 .
  • a material combination is then applied 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 formed longer than the film layer 8 in the longitudinal direction of the valve, so that the paper layer 9 projects out of the film layer 8 towards the interior of the bag.
  • the film layer 8 is formed perpendicular to the longitudinal direction of the valve wider than the paper layer 9.
  • Both the foil layer 8 and the paper layer 9 extend laterally over the fold lines 4 of the bottom flaps 3 and are thus folded in with the bottom flaps 3 around the fold lines 4 in the formation of the folded bottom.
  • a valve arrangement is formed which, in the longitudinal direction of the valve, that is to say directed outwards in FIG. 3, has a first end 13 and an opposite second end 14 directed toward the interior of the bag.
  • 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.
  • Figure 5 shows a side view of a filled bag that 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.
  • the reinforcing sheet 15 Shown here is schematically the reinforcing sheet 15, the valve made of film layer 8 and paper 9 formed 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)

Abstract

In 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, the usefulness of the bag is improved by the fact that the jacket wall has, on its outside, a layer of a plastic film with a thickness of 60 pm or less, 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.

Description

Sack 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 Man- telwandung wenigstens eine Papierlage aufweist und die wenigstens eine Papierlage die Belastbarkeit mit Füllgewicht und die mechanische Stabilität des Sacks zumindest überwiegend bestimmt.  The invention relates to a bag having 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 closed at the front ends folded bottoms and with a filling opening for filling with a filling, wherein the mantle wall has at least one paper layer and the at least one paper layer at least predominantly determines the capacity with filling weight and the mechanical stability of the bag.
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 Kunststoffla- gen 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. Als Alternative sind daher Kunststoff säcke bekannt. Diese bestehen aus wenigstens einer Kunststofflage mit einer für die angestrebte Stabilität und Festigkeit ausreichenden Lagenstärke von beispielsweise 100 pm. 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. 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 sheets 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 bags, the problem is that the paper layers with Soak up damp or wet environment. They can therefore lose stability and also become unsightly due to the susceptibility of damp paper to soiling. As an alternative, plastic bags are therefore known. These consist of at least one plastic layer with a sufficient for the desired stability and strength layer thickness of for example 100 pm. 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.
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 Mantelwandung auf ihrer Außenseite eine Lage aus einer Kunststofffolie mit ei- ner Stärke von 60 pm oder weniger aufweist, die die wenigstens eine Papierlage vor Feuchte schützend umgibt und in einem Bereich überlappender Enden Klebestellen aufweist, zwischen denen Entlüftungswege bestehen. Der erfindungsgemäße Papiersack weist somit auf seiner Außenseite eine dünne Kunststofffolie auf, die die die Statik des Sacks bestimmenden Papierlagen vor Feuchteeinflüssen 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. To achieve this object, according to the invention, a sack of the type mentioned in the introduction is characterized in that the outer wall has on its outer side a layer of a plastic film having a thickness of 60 .mu.m or less, which protectively surrounds the at least one paper layer from moisture and in one Overlapping ends has splices between which there are ventilation paths. 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 an area of overlapping ends in which it is carried itself glued closed 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 in einer besonders bevorzugten Ausführungsform 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 in a particularly preferred embodiment without perforations, especially in the region of the overlapping ends of the plastic films in which the splices are located.
Die Verklebung der überlappenden Enden der Kunststofffolie mitei- nander kann mit einem geeigneten Klebstoffauftrag erfolgen, ist aber auch in anderer Form, beispielsweise durch lokale Verschweißungen der beiden Enden miteinander möglich. The adhesive bonding of the overlapping ends of the plastic film with one another can take place with a suitable application of adhesive, but is also possible in another form, for example by local welding of the two ends to one another.
Die Kunststofffolie auf der Außenseite der Mantelwandung weist vor- zugsweise eine Stärke zwischen 10 und 50 μητι 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 of between 10 and 50 μm. 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 can be formed of conventional film plastics. Preferred is the use of polyethylene.
In einer anderen Ausführungsform der Erfindung ist die Kunststofffo- lie 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 allen Fällen, in denen eine transparente Kunststofffolie verwendet wird, ist es zweckmäßig, zumindest die darunterliegende Papierlage mit gebleichtem Papier auszubilden. Dadurch werden störende Re- flektionen vermieden, wie sie bei einem durch ungebleichtes Kraftpapier entstehenden dunklen Hintergrund auftreten würden. In another embodiment of the invention, the plastic film itself is printed, preferably on the inside of the transparent plastic film facing the underlying paper layer. This creates a brilliant print that is easy to read and presentable for sales purposes. 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 Strömungsquer-schnitt zum Transport der Luft zu den Entlüftungswegen zwischen den Klebestellen der Kunststofffolie ver- größert wird. The 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 to the venting paths between the splices of the plastic film is enlarged.
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. 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 Papierla- gen 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. 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. 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 the case of a construction with a plurality of paper layers, while with a paper layer used a higher basis weight, for example of 120 g / m 2, may be expedient. The paper grades preferably have a TEA (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 at least 240 for " extensible "kraft paper types. 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 gefalte- te 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 zwei- tes 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 umgefal- teten, 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 eben- falls 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 ge- schützt. 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 valve, which can be bent tubular to form a filling channel for the filling process, is inserted. In this case, the valve forms a first end pointing in relation to the valve opening to the interior of the bag and a second end pointing to the jacket wall. The protection of the bag against moisture formation by the plastic film surrounding the paper bag is effectively supplemented by the fact that the valve has a paper layer forming the first end which folds over at the second end. teten, a first film portion and a thus connected via a fold line second film section having film layer is overlapped. Thus, the second end of the paper layer facing the outer side of the bag is overlapped by the plastic film and thus also protected against exposure to 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 which is preferred for sealing is therefore covered by the film layer towards the exterior of the bag and thus protected against exposure to 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 μιη, vorzugsweise 40 μητι 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 denk- bar, 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. Die Erfindung soll im Folgenden anhand von in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert werden. Es zeigen: In a preferred embodiment, the film layer has a thickness of 30 to 50 μιη, preferably 40 μητι on. 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, however, it is also conceivable to combine the film layer in the specified thickness with a paper layer having a different basis weight or a paper layer with the specified basis weight with a film layer of a different thickness. The invention will be explained in more detail below with reference to exemplary embodiments illustrated in the drawing. Show it:
Figur 1 eine lediglich schematische Darstellung der Ausbildung einer Längsklebenaht in einem überlappenden Bereich der Kunststofffolie; Figure 1 is a merely schematic representation of the formation of a longitudinal adhesive seam in an overlapping region of the plastic film;
Figur 2 ein durch Bodeneckeinschläge teilweise gefalteter Figure 2 is a partially folded by Bodeneneckeinschläge
Kreuzboden mit offenen Bodenklappen und der Positionierung eines Verstärkungsblatts für die Ventilöffnung;  Cross bottom with open bottom flaps and the positioning of a reinforcement sheet for the valve opening;
Figur 3 den Kreuzboden in der Darstellung der Figur 2 mit der Figure 3 shows the cross bottom in the representation of Figure 2 with the
Positionierung eines Ventils aus einer Papierlage und einer die Papierlage an einem Ende übergreifenden Folienlage;  Positioning a valve from a paper layer and a film layer over the paper layer at one end;
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; Figure 4 is a perspective view of the bottom according to Figure 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;
Figur 5 eine Seitenansicht eines erfindungsgemäßen Sacks mit zu Darstellungszwecken leicht geöffneter Ventilöffnung mit dem Verstärkungsblatt und dem eingesetzten Ventil. Figure 5 is 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. Selbstverständlich sind auch andere Klebstellenmuster, die sich beispielsweise nicht linear, sondern in dem Überlappungsstreifen flächig erstrecken, für die Ausübung der Erfindung geeignet. 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. FIG. 1 shows only schematically 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. Of course, other splice pattern, for example, non-linear, but extend in the overlap strip area, suitable for the practice of the invention. In Figures 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 ver- stärkt 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, vor- zugsweise 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 Figure 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 somewhat in the region of the bottom flaps 3 and is also glued there. The reinforcing sheet 5 is preferably provided with a folded-over 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 preferably consists of a paper layer 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 Folienla- ge 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. 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. 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. 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 abge- deckt 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. On the arrangement prepared according to FIG. 2, according to FIG. 3, a material combination is then applied 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 formed longer than the film layer 8 in the longitudinal direction of the valve, so that the paper layer 9 projects out of the film layer 8 towards the interior of the bag. The film layer 8 is formed perpendicular to the longitudinal direction of the valve wider than the paper layer 9. Both the foil layer 8 and the paper layer 9 extend laterally over the fold lines 4 of the bottom flaps 3 and are thus folded in with the bottom flaps 3 around the fold lines 4 in the formation of the folded bottom. Thus, a valve arrangement is formed which, in the longitudinal direction of the valve, that is to say directed outwards in FIG. 3, has a first end 13 and an opposite second end 14 directed toward the interior of the bag. 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. Figure 5 shows a side view of a filled bag that 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 valve made of film layer 8 and paper 9 formed 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

Ansprüche claims
1. Sack mit einer aus wenigstens zwei jeweils mittels einer Längs- klebenaht zu einem Schlauch geschlossenen Lagen gebildeten Mantelwandung mit zwei Stirnenden und mit dem Sack an den1. Sack with one of at least two in each case by means of a longitudinal adhesive seam to a tube closed layers formed Mantelwandung with two ends and with the bag to the
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, dadurch gekennzeichnet, dass die Mantelwandung auf ihrer Außenseite eine Lage aus einer Kunststofffolie mit einer Stärke von 60 pm oder weniger aufweist, die die wenigstens eine Papierlage vor Feuchte schützend umgibt und in einem Be- reich überlappender Enden Klebestellen (K) aufweist, zwischen denen Entlüftungswege (Z) bestehen. Front ends closing folded bottoms and with a filling opening for filling with a filling material, wherein the jacket wall has at least one paper layer and the at least one paper layer determines the capacity with filling weight and the mechanical stability of the bag at least predominantly, characterized in that the jacket wall on its outer side a Layer of a plastic film having a thickness of 60 pm or less, which protects the at least one paper layer from moisture and in a region overlapping ends has splices (K), between which ventilation paths (Z) exist.
2. Sack nach Anspruch 1 , dadurch gekennzeichnet, dass die Kunststofffolie eine Stärke zwischen 10 und 50 μιη aufweist. 2. Sack according to claim 1, characterized in that the plastic film has a thickness between 10 and 50 μιη.
3. Sack nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Kunststofffolie nur punktuell mit der darunter befindlichen Papierlage verklebt und daher leicht von der Papierlage entfernbar ist. 3. Sack according to claim 1 or 2, characterized in that the plastic film glued only at certain points with the underlying paper layer and therefore is easily removed from the paper layer.
4. Sack nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Kunststofffolie transparent ausgebildet ist. 4. Sack according to one of claims 1 to 3, characterized in that the plastic film is transparent.
5. Sack nach einem der Ansprüche 1 bis 4, dadurch gekennzeich- net, dass die Kunststofffolie aus Polyethylen besteht. 5. Sack according to one of claims 1 to 4, characterized marked, that the plastic film consists of polyethylene.
6. Sack nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die unter der Kunststofffolie befindliche Papierlage aus gebleichtem Papier besteht. 6. Sack according to one of claims 1 to 5, characterized in that the paper sheet located under the plastic film consists of bleached paper.
7. Sack nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass die Kunststofffolie auf ihrer zur darunter liegenden Papierlage zeigenden Innenseite bedruckt ist. 7. Sack according to one of claims 4 to 6, characterized in that the plastic film is printed on its facing the underlying paper layer inside.
8. Sack nach einem der Ansprüche 3 bis 7, dadurch gekennzeich- net, dass die Kunststofffolie mit einer die Entfernung von der8. Sack according to one of claims 3 to 7, characterized marked, that the plastic film with a distance from the
Mantelwandung erleichternden Abreißhilfe versehen ist. Mantle wall facilitating tear-off is provided.
9. Sack nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Kunststofffolie in die Faltung der Böden einbezo- gen ist. 9. Sack according to one of claims 1 to 8, characterized in that the plastic film is included gene in the folding of the floors.
10. Sack nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Kunststofffolie auch in dem Bereich überlappender Enden frei von Perforationen ist. 10. Sack according to one of claims 1 to 9, characterized in that the plastic film is also in the region of overlapping ends free of perforations.
11. Sack nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass er zwei gefaltete Böden aufweist, von denen einer mit einer Ventilöffnung versehen ist, in die ein flachliegendes, für den Einfüllvorgang rohrförmig zur Ausbildung eines Ein- füllkanals aufbiegbares Ventil eingelegt ist, das ein bezüglich der Ventilöffnung zum Sackinnern zeigendes ersten Ende (13) und ein zur Mantelwandung zeigendes zweites Ende (14) aufweist, 11. A bag according to any one of claims 1 to 10, characterized in that it comprises two folded bottoms, one of which is provided with a valve opening, in which a flat-lying, for the filling tube-shaped to form a filling channel aufbiegbares valve is inserted which has a first end (13) facing the interior of the sack with respect to the valve opening and a second end (14) facing the jacket wall,
dass das Ventil eine das erste Ende (13) bildende Papierlage (9) aufweist, die am zweiten Ende (14) von einer umgefalteten, einen ersten Folienabschnitt (11 ) und einen damit über eine Faltlinie (10) verbundenen zweiten Folienabschnitt (12) aufweisenden Folienlage (8) übergriffen ist. in that the valve has a paper layer (9) forming the first end (13), which at the second end (14) comprises a folded over, a first film section (11) and a second film section (12) connected thereto via a fold line (10) Foil layer (8) is overlapped.
12. Sack nach Anspruch 1 , dadurch gekennzeichnet, dass sich die Folienabschnitte (11 , 12) jeweils nur über einen Teil der Länge der Papierlage (9) erstrecken. 12. Sack according to claim 1, characterized in that the film sections (11, 12) each extend over only a part of the length of the paper layer (9).
13. Sack nach Anspruch 11 oder 12, dadurch gekennzeichnet, dass die Folienlage (8) breiter als die Papierlage (9) ist. 13. Sack according to claim 11 or 12, characterized in that the film layer (8) is wider than the paper layer (9).
14. Sack nach einem der Ansprüche 11 bis 13, dadurch gekennzeichnet, dass in die Faltung des Bodens im Bereich des Ventils ein mit Abstand von dem zweiten Ende (14) des Ventil endendes Verstärkungsblatt (5) aus Papier eingesetzt ist. 14. Sack according to one of claims 11 to 13, characterized in that in the folding of the bottom in the region of the valve at a distance from the second end (14) of the valve end reinforcing sheet (5) is inserted from paper.
15. Sack nach einem der Ansprüche 1 1 bis 14, dadurch gekennzeichnet, dass die Folienlage (8) eine Stärke von 30 bis 50 m und die Papierlage (9) ein Flächengewicht zwischen 50 und 100 g/m2 aufweisen. 15. Sack according to one of claims 1 1 to 14, characterized in that the film layer (8) has a thickness of 30 to 50 m and the paper layer (9) has a basis weight between 50 and 100 g / m 2 .
EP15717616.5A 2014-02-20 2015-02-19 Bag Active EP3107816B1 (en)

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HRP20181262TT HRP20181262T1 (en) 2014-02-20 2018-08-02 Bag

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DE202017001357U1 (en) * 2017-03-13 2018-06-14 Dy-Pack Verpackungen Gustav Dyckerhoff Gmbh Multi-layer valve bag
ES2848081B2 (en) * 2020-02-05 2022-11-11 Meseguer Cristobal Sa PAPER BAG WITH SEPARABLE INTERNAL WATERPROOFING COMPONENT

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SI3107816T1 (en) 2019-03-29
RS58473B1 (en) 2019-04-30
RU2016137317A (en) 2018-03-21
HRP20181262T1 (en) 2019-04-05
EP3107816B1 (en) 2018-05-09
MY179004A (en) 2020-10-26
MX2016010630A (en) 2017-05-30
US9873553B2 (en) 2018-01-23
NO2768978T3 (en) 2018-04-21
US20170057698A1 (en) 2017-03-02
JP6509891B2 (en) 2019-05-08
MX369269B (en) 2019-11-04
UA120430C2 (en) 2019-12-10
RU2016137317A3 (en) 2018-08-30
RU2682428C2 (en) 2019-03-19
PL3107816T3 (en) 2018-12-31
JP2017507088A (en) 2017-03-16
WO2015125018A1 (en) 2015-08-27
HUE041682T2 (en) 2019-05-28
DE102014002411A1 (en) 2015-08-20
ES2683521T3 (en) 2018-09-26
DK3107816T3 (en) 2018-08-13

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