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EP1849709A1 - Packaging for bulk goods and method for producing such packaging - Google Patents

Packaging for bulk goods and method for producing such packaging Download PDF

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Publication number
EP1849709A1
EP1849709A1 EP07001715A EP07001715A EP1849709A1 EP 1849709 A1 EP1849709 A1 EP 1849709A1 EP 07001715 A EP07001715 A EP 07001715A EP 07001715 A EP07001715 A EP 07001715A EP 1849709 A1 EP1849709 A1 EP 1849709A1
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EP
European Patent Office
Prior art keywords
packaging
protective cover
wall
weakening
connection point
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
EP07001715A
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German (de)
French (fr)
Other versions
EP1849709B1 (en
Inventor
Klaus Grüterich
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.)
Nordfolien GmbH
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Nordfolien GmbH
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Publication date
Application filed by Nordfolien GmbH filed Critical Nordfolien GmbH
Priority to PL07001715T priority Critical patent/PL1849709T3/en
Publication of EP1849709A1 publication Critical patent/EP1849709A1/en
Application granted granted Critical
Publication of EP1849709B1 publication Critical patent/EP1849709B1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D31/00Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/04Bags or like containers made of paper and having structural provision for thickness of contents with multiple walls

Definitions

  • the invention relates to a package for bulk materials, in particular a bag made of plastic, with a packaging wall enveloping the bulk material. Furthermore, the invention relates to a method for producing a package for bulk materials, in particular a bag made of plastic.
  • Known packages are made of a flexible material, for example sacks of a plastic film, and serve to encase various bulk materials, such as flour, granules or the like, which are used, inter alia, in the food industry or the chemical industry.
  • bulk materials are possibly only intermediates and should be transported with the help of packaging or possibly stored before further processing can take place.
  • the outside of the packaging When filling, during transport or during storage of such packages, the outside of the packaging may be contaminated by residues of bulk material or other conceivable influences, such as, for example, excrements of small animals.
  • the contaminants can adhere to the outside of the packaging and then, if appropriate, arrive at a further processing process when emptying the packaging, together with the bulk material discharged from the packaging.
  • the contaminants cause contamination and possibly unusability of the manufactured product.
  • the invention has the object to improve a package of the aforementioned genus such that adhering to the packaging contaminants can not get into the processing.
  • the invention provides that at least part of the Verpakkungswand has at least one outer protective cover, that the protective cover and the packaging wall in predetermined areas via at least one common connection point are interconnected, and that each connection point has at least one weakening element.
  • the protective cover can be easily removed with advantage immediately before emptying the packaging, so that there is always a clean or no impurities having, single or multi-layered packaging wall.
  • soiling can no longer reach the filling area of the production plant, whereby unnecessary or unacceptable contamination of the product produced is avoided.
  • Sufficient contact between the protective cover and the packaging wall can already be provided, for example, with the aid of a connection point in the bottom region of the packaging, wherein at least one further connection point between Packaging wall and protective cover, for example, in the upper edge region of the packaging is conceivable.
  • the weakening member is a weakening the joint coating, which is applied between the protective cover and the Verpakkungswand.
  • the use of a coating makes it possible, for example, to so easily weaken a bonded joint that the protective cover is held on the packaging wall, but nevertheless can be separated from the packaging wall without difficulty or without the aid of aids if necessary.
  • the coating is preferably applied circumferentially between the protective cover and the packaging wall in the bottom region and in the upper edge region or in the region of the filling opening of the packaging.
  • the degree of weakening can advantageously be influenced simply by a coating applied in sections.
  • forces that arise when filling or during transport of the packaging according to the invention and excessively act on the connection points can be added with advantage and unwanted separation of the protective cover can be avoided by the packaging wall.
  • Differently greatly weakened joints which vary in the packaging sizes and the weight of the packaged bulk material to be accommodated therein, can be created, for example by using different types of coatings in addition to sections of the applied coating having different lengths.
  • the coating is advantageously a release varnish, which can advantageously be easily brought into contact both with the outside of the packaging wall and with the inside of the protective cover.
  • the release lacquer thereby reduces the ability of forming a cohesive Connection between the surfaces of the packaging wall and the protective cover in the region of a respective connection point of the packaging, so that the hose-like outer protective cover can be stripped from the inner packaging wall of the bag.
  • a release coating it is of course also possible to use other coatings or release agents, such as talcum, that lower the adhesion between the protective cover and the packaging wall.
  • a weakening line in the protective cover.
  • the protective cover can also be removed in an advantageously simple manner from the packaging wall.
  • the transverse to the longitudinal axis of the package extending, and thus formed as a transverse perforation weakening line is preferably mounted circumferentially in the protective cover both in the bottom region and in the upper edge region of the packaging according to the invention. It is also possible that in each case a weakening line formed as a perforation is arranged in the outer edge region of the bottom and of the upper opening edge of the packaging.
  • a further possibility of forming a weakening element is the use of predetermined combinations of materials for the packaging wall and the protective cover. With the help of appropriate materials, each having different properties, can be achieved in the region of the joints, inter alia, a desired degree of weakening.
  • two polymers are used, such as polyethylene and polypropylene, which, in the case of a connection point produced by material connection, enter into weakened contact with one another, which can easily be loosened if necessary.
  • each protective sheath has at least one desired separation line extending in the longitudinal direction of the package.
  • the protective cover can be split or open in an advantageous simple manner in the longitudinal direction, then by the lateral repelling of the separated protective cover in combination with the transversely aligned weakenings a simplified separation in a kind of peeling of the To be able to make Verpakkungswand.
  • the packaging according to the invention can have both on its front side and on its rear side a predetermined separation line extending in the longitudinal direction of the packaging in the protective cover, which advantageously facilitates the separation and peeling of the protective cover of a packaging stacked on transport pallets.
  • the packaging wall and the protective cover have different material thicknesses.
  • the weight resulting from the mass of the packaged bulk material is completely absorbed by the packaging wall forming the actual carrier, so that foils with a substantially smaller material thickness or material thickness can be used for the protective wrapper.
  • the use of material for producing the packaging according to the invention can be advantageously reduced.
  • certain minimum or maximum dimensions for the selected material thickness of the protective cover should not be fallen below or exceeded.
  • Such protective sheaths may for example have a material thickness or thickness in the range of 20 to 100 microns. It is also possible that the protective cover and the packaging wall have almost equal thicknesses of material.
  • the enveloped by the protective cover packaging wall can also be designed in several layers.
  • the material for the protective cover is a plastic, for example polyethylene or polypropylene, whose use has proved successful for plastic films in terms of optimum mechanical properties and processing options.
  • the flexibility of the plastic used allows the sheathing of bags of different shapes and sizes. Furthermore, prevents a plastic protective cover the contact of the packaging wall with moisture, so that with advantage packaging material or bags made of paper can be coated with such a protective cover.
  • the protective cover due to the material properties of the plastic used, improve the aging resistance.
  • connection point is formed as a weld.
  • any connection point between the packaging wall and protective cover over a weld advantageously can be easily and optionally produce sufficient strength.
  • connection point can be formed together with a bottom weld seam interconnecting the insides of the packaging wall. It is also possible, for example, to create a joint using adhesive methods.
  • a method for producing a package for bulk materials in particular for producing a bag made of plastic, in which according to the invention at least one tube section is prefabricated to the prefabricated tube section is placed in the longitudinal direction of a material web equipped with at least one weakening organ, overlapping areas of the Material web interconnected and a closed protective cover is formed, the protective cover and the hose section are folded together to form a flat hose, and at least one cohesive Joint between the protective cover and at least one end of the hose section is generated.
  • a packaging can be produced with a protective cover covering the outside of a packaging wall, in which, caused by the weakening elements in the region of the connection point, shortly before the emptying of the packed bulk material, the outer envelope with dirt possibly adhering to it is advantageous easy way to remove, so that no contamination of the bulk material is caused in a possible further processing.
  • individually prefabricated tube sections as well as an endless tube can be used for the packaging wall forming a carrier, which are encased by at least a portion of a material web present as a plastic film.
  • the material web has in predetermined areas or sections at least one, for example, as a coating and / or predetermined breaking line trained weakening organ to effect a weakening of the protective sheath to the packaging wall connecting joint and / or the sheath itself.
  • the width of the material web is chosen such that the side regions of the material web form a mutually overlapping region after the wrapping of the packaging wall forming an inner casing.
  • the overlap area can be connected to each other by means of material closure, such as welding or gluing.
  • a closed outer protective sheath surrounding the hose section or the endless hose of the inner sheath is provided, which has, for example, a glued longitudinal seam.
  • each tube section or the endless tube with the protective wall enclosing the packaging wall can be folded together to form a flat tube, in the lateral areas of which gussets, for example, can also be inserted.
  • the production of the connection point can advantageously take place together with a bottom weld seam closing off the insides of the packaging wall in the bottom region of the packaging according to the invention.
  • other joining methods such as gluing, can be used for producing a cohesive connection. Under certain circumstances, it is necessary for the formation of a package to separate each predetermined sections of an endless tube in the region of a respective connection point.
  • the packaging wall 3 is encased by a protective cover 4 and thus a two-ply bag 1 is formed.
  • the packaging wall 3 and the protective cover 4 have in the bottom region 2 a common connection point 5.
  • a weakening element embodied as a coated coating 6 is present between the packaging wall 3 and the protective covering 4.
  • the coating 6 can be applied both on the inside of the protective cover 4 and on the outside of the packaging wall 3 and is arranged in the bottom region 2 and at an upper filling opening 7 of the bag 1, which in particular simplifies the peeling off of the protective cover 4 from the packaging wall 3.
  • the protective cover 4 of the packaging according to the invention on the front side 8 and optionally also on the back 9 of the bag 1 has a designed as a longitudinal perforation predetermined separation line 10. With the help of the predetermined breaking line 10, the protective cover 4 can be separated in the longitudinal direction, which additionally facilitates the peeling off of the protective cover 4 from the packaging wall 3.
  • Fig. 2 shows another embodiment of a package according to the invention.
  • the protective covering 11 of the gusseted sack 12 has, instead of a coating 6 (FIG. 1), in particular in the bottom region 13 and at an upper filling opening 14, a peripheral weakening line 15 formed as a transverse perforation, which comprises removing the protective covering 11 from the packaging wall 4 guaranteed.
  • a predetermined breaking line 10 is formed on the protective cover 11 both on the front side 8 and optionally on the rear side 9 of the bag 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Basic Packing Technique (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Making Paper Articles (AREA)
  • Wrappers (AREA)

Abstract

The packaging has a packaging wall surrounding a bulk material. A portion of the packaging wall (3) has an outer protective sheathing (4). The protective sheathing and the packaging wall have a joint connection point (5) in predetermined areas. Each connection point has a weak organ. The weak organ is a surface coating (6) weakening the connection point, which is applied between the protective sheathing and the packaging wall. The surface coating is applied section-wise. An independent claim is also included for a method for production of a device for packaging bulk material.

Description

Die Erfindung bezieht sich auf eine Verpackung für Schüttgüter, insbesondere auf einen Sack aus Kunststoffolie, mit einer das Schüttgut einhüllenden Verpackungswand. Des weiteren bezieht sich die Erfindung auf ein Verfahren zur Herstellung einer Verpackung für Schüttgüter, insbesondere eines Sackes aus Kunststoffolie.The invention relates to a package for bulk materials, in particular a bag made of plastic, with a packaging wall enveloping the bulk material. Furthermore, the invention relates to a method for producing a package for bulk materials, in particular a bag made of plastic.

Bekannte Verpackungen sind aus einem flexiblen Material gefertigt, beispielsweise Säcke aus einer Kunststoffolie, und dienen zur Umhüllung verschiedener Schüttgüter, wie zum Beispiel Mehl, Granulate oder dergleichen, die unter anderem in der Lebensmittelindustrie oder der chemischen Industrie verwendet werden. Derartige Schüttgüter sind gegebenenfalls nur Zwischenprodukte und sollen mit Hilfe der Verpackungen transportiert oder unter Umständen zwischengelagert werden, bevor eine Weiterverarbeitung erfolgen kann.Known packages are made of a flexible material, for example sacks of a plastic film, and serve to encase various bulk materials, such as flour, granules or the like, which are used, inter alia, in the food industry or the chemical industry. Such bulk materials are possibly only intermediates and should be transported with the help of packaging or possibly stored before further processing can take place.

Beim Befüllen, beim Transport oder bei der Lagerung derartiger Verpackungen kann die Außenseite der Verpackung durch Schüttgutreste oder andere denkbare Einflüsse, wie zum Beispiel Exkremente von Kleintieren, verschmutzt werden. Die Verschmutzungen können an der Außenseite der Verpackung anhaften und gelangen dann gegebenenfalls beim Entleeren der Verpackung, gemeinsam mit dem aus der Verpackung abgegebenen Schüttgut, in einen weiteren Verarbeitungsprozeß. Die Verschmutzungen verursachen eine Verunreinigung und möglicherweise eine Unbrauchbarkeit des hergestellten Produktes.When filling, during transport or during storage of such packages, the outside of the packaging may be contaminated by residues of bulk material or other conceivable influences, such as, for example, excrements of small animals. The contaminants can adhere to the outside of the packaging and then, if appropriate, arrive at a further processing process when emptying the packaging, together with the bulk material discharged from the packaging. The contaminants cause contamination and possibly unusability of the manufactured product.

Der Erfindung liegt die Aufgabe zugrunde, eine Verpackung der vorbezeichneten Gattung derart zu verbessern, daß an der Verpackung anhaftende Verschmutzungen nicht in die Weiterverarbeitung gelangen können.The invention has the object to improve a package of the aforementioned genus such that adhering to the packaging contaminants can not get into the processing.

Diese Aufgabe ist erfindungsgemäß durch eine Verpackung mit den Merkmalen des Patentanspruchs 1 gelöst. Vorteilhafte Weiterbildungen und Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.This object is achieved by a package with the features of claim 1. Advantageous developments and refinements of the invention are specified in the subclaims.

Bei einer Verpackung für Schüttgüter, insbesondere bei einem Sack aus Kunststoffolie, mit einer das Schüttgut einhüllenden Verpackungswand, ist erfindungsgemäß vorgesehen, daß wenigstens ein Teil der Verpakkungswand mindestens eine äußere Schutzhülle aufweist, daß die Schutzhülle und die Verpackungswand in vorbestimmten Bereichen über wenigstens eine gemeinsame Verbindungsstelle miteinander verbunden sind, und daß jede Verbindungsstelle zumindest ein Schwächungsorgan aufweist.In a package for bulk materials, in particular in a bag made of plastic, with a wrapping material enveloping the packaging wall, the invention provides that at least part of the Verpakkungswand has at least one outer protective cover, that the protective cover and the packaging wall in predetermined areas via at least one common connection point are interconnected, and that each connection point has at least one weakening element.

Die Schutzhülle kann mit Vorteil unmittelbar vor dem Entleeren der Verpackung leicht entfernt werden, so daß stets eine saubere bzw. keine Verunreinigungen aufweisende, ein- oder mehrlagige Verpackungswand vorliegt. Insbesondere beim Befüllen einer Produktionsanlage mit dem weiterzuverarbeitenden Schüttgut können Verschmutzungen nicht mehr in den Einfüllbereich der Produktionsanlage gelangen, wodurch eine unnötige oder eine unzulässige Verunreinigung des hergestellten Produktes vermieden ist. Somit läßt sich zum einen die Herstellung von Ausschuß verhindern und zum anderen ist stets eine gleichbleibende Qualität des erzeugten Produktes gewährleistet. Ein ausreichender Kontakt zwischen Schutzhülle und Verpackungswand kann beispielsweise bereits mit Hilfe einer Verbindungsstelle im Bodenbereich der Verpackung gegeben sein, wobei mindestens eine weitere Verbindungsstelle zwischen Verpackungswand und Schutzhülle zum Beispiel im oberen Randbereich der Verpackung denkbar ist.The protective cover can be easily removed with advantage immediately before emptying the packaging, so that there is always a clean or no impurities having, single or multi-layered packaging wall. In particular, when filling a production plant with the bulk material to be processed, soiling can no longer reach the filling area of the production plant, whereby unnecessary or unacceptable contamination of the product produced is avoided. Thus, on the one hand prevent the production of waste and on the other hand, a consistent quality of the product is always guaranteed. Sufficient contact between the protective cover and the packaging wall can already be provided, for example, with the aid of a connection point in the bottom region of the packaging, wherein at least one further connection point between Packaging wall and protective cover, for example, in the upper edge region of the packaging is conceivable.

Nach einer ersten vorteilhaften Weiterbildung der Erfindung ist vorgesehen, daß das Schwächungsorgan eine die Verbindungsstelle schwächende Beschichtung ist, die zwischen der Schutzhülle und der Verpakkungswand aufgetragen ist. Der Einsatz einer Beschichtung ermöglicht zum Beispiel, eine stoffschlüssig gefügte Verbindungsstelle derart einfach zu schwächen, daß die Schutzhülle zwar an der Verpackungswand gehalten ist, sich aber dennoch bei Bedarf ohne Schwierigkeiten oder ohne Zuhilfenahme von Hilfsmitteln von der Verpackungswand separieren läßt. Die Beschichtung ist vorzugsweise im Bodenbereich sowie im oberen Randbereich bzw. im Bereich der Einfüllöffnung der Verpackung jeweils umlaufend zwischen der Schutzhülle und der Verpackungswand aufgetragen.According to a first advantageous embodiment of the invention, it is provided that the weakening member is a weakening the joint coating, which is applied between the protective cover and the Verpakkungswand. The use of a coating makes it possible, for example, to so easily weaken a bonded joint that the protective cover is held on the packaging wall, but nevertheless can be separated from the packaging wall without difficulty or without the aid of aids if necessary. The coating is preferably applied circumferentially between the protective cover and the packaging wall in the bottom region and in the upper edge region or in the region of the filling opening of the packaging.

Im Bereich der Verbindungsstelle kann der Grad der Schwächung vorteilhaft einfach durch eine abschnittsweise aufgetragene Beschichtung beeinflußt werden. Insbesondere Kräfte, die beim Befüllen oder beim Transport der erfindungsgemäßen Verpackung entstehen und übermäßig auf die Verbindungsstellen einwirken, können mit Vorteil aufgenommen und ein ungewolltes Trennen der Schutzhülle von der Verpackungswand vermieden werden. Unterschiedlich stark geschwächte Verbindungsstellen, die hinsichtlich der Verpackungsgrößen und dem darin aufzunehmenden Gewicht des verpackten Schüttgutes variieren, können geschaffen werden, indem zum Beispiel, neben unterschiedlich lang ausgebildeten Abschnitten der aufgetragenen Beschichtung, verschiedenartige Beschichtungen Anwendung finden.In the region of the joint, the degree of weakening can advantageously be influenced simply by a coating applied in sections. In particular, forces that arise when filling or during transport of the packaging according to the invention and excessively act on the connection points, can be added with advantage and unwanted separation of the protective cover can be avoided by the packaging wall. Differently greatly weakened joints, which vary in the packaging sizes and the weight of the packaged bulk material to be accommodated therein, can be created, for example by using different types of coatings in addition to sections of the applied coating having different lengths.

Die Beschichtung ist mit Vorteil ein Trennlack, der sowohl mit der Außenseite der Verpackungswand als auch mit der Innenseite der Schutzhülle vorteilhaft einfach in Kontakt gebracht werden kann. Der Trennlack vermindert dabei die Fähigkeit der Ausbildung einer stoffschlüssigen Verbindung zwischen den Oberflächen der Verpackungswand und der Schutzhülle im Bereich einer jeweiligen Verbindungsstelle der Verpakkung, so daß die schlauchartig ausgebildete äußere Schutzhülle von der inneren Verpackungswand des Sackes abgestreift werden kann. Neben einem Trennlack ist es selbstverständlich auch möglich, andere, die Haftung zwischen der Schutzhülle und der Verpackungswand herabsetzende Beschichtungen bzw. Trennmittel, wie zum Beispiel Talkum, einzusetzen.The coating is advantageously a release varnish, which can advantageously be easily brought into contact both with the outside of the packaging wall and with the inside of the protective cover. The release lacquer thereby reduces the ability of forming a cohesive Connection between the surfaces of the packaging wall and the protective cover in the region of a respective connection point of the packaging, so that the hose-like outer protective cover can be stripped from the inner packaging wall of the bag. In addition to a release coating, it is of course also possible to use other coatings or release agents, such as talcum, that lower the adhesion between the protective cover and the packaging wall.

An Stelle einer zwischen der Schutzhülle und der Verpackungswand aufgetragenen Beschichtung als Schwächungsorgan besteht alternativ die Möglichkeit, eine Schwächungslinie in der Schutzhülle anzuordnen. Mit Hilfe einer im Bereich der Verbindungsstelle angeordneten Schwächungslinie, läßt sich die Schutzhülle ebenfalls auf eine vorteilhaft einfache Weise von der Verpackungswand entfernen. Die quer zur Längsachse der Verpackung verlaufende, und somit als Querperforation ausgebildete Schwächungslinie ist vorzugsweise sowohl im Bodenbereich als auch im oberen Randbereich der erfindungsgemäßen Verpackung umlaufend in der Schutzhülle angebracht. Es ist auch möglich, daß jeweils eine als Perforation ausgebildete Schwächungslinie im äußeren Randbereich des Bodens und des oberen Öffnungsrandes der Verpakkung angeordnet ist.Instead of a coating applied between the protective cover and the packaging wall as a weakening element, it is alternatively possible to arrange a weakening line in the protective cover. By means of a line of weakness arranged in the region of the connection, the protective cover can also be removed in an advantageously simple manner from the packaging wall. The transverse to the longitudinal axis of the package extending, and thus formed as a transverse perforation weakening line is preferably mounted circumferentially in the protective cover both in the bottom region and in the upper edge region of the packaging according to the invention. It is also possible that in each case a weakening line formed as a perforation is arranged in the outer edge region of the bottom and of the upper opening edge of the packaging.

Eine weitere Möglichkeit der Ausbildung eines Schwächungsorgans, besteht in der Verwendung vorbestimmter Materialkombinationen für die Verpackungswand und die Schutzhülle. Mit Hilfe entsprechender Materialien, die jeweils unterschiedliche Eigenschaften aufweisen, läßt sich im Bereich der Verbindungsstellen unter anderem ein gewünschter Schwächungsgrad erzielen. Zur Anwendung kommen dabei beispielsweise zwei Polymere, wie zum Beispiel Polyethylen und Polypropylen, die bei einer mittels Stoffschluß erzeugten Verbindungsstelle einen geschwächten Kontakt miteinander eingehen, der im Bedarfsfall leicht gelöst werden kann.A further possibility of forming a weakening element is the use of predetermined combinations of materials for the packaging wall and the protective cover. With the help of appropriate materials, each having different properties, can be achieved in the region of the joints, inter alia, a desired degree of weakening. For example, two polymers are used, such as polyethylene and polypropylene, which, in the case of a connection point produced by material connection, enter into weakened contact with one another, which can easily be loosened if necessary.

Nach einer Weiterbildung der Erfindung ist vorgesehen, daß jede Schutzhülle zusätzlich zu einem die Verbindungsstelle schwächenden Schwächungsorgan wenigstens eine in Längsrichtung der Verpackung verlaufende Solltrennlinie aufweist. Mit Hilfe der zum Beispiel als Längsperforation ausgebildeten Solltrennlinie läßt sich die Schutzhülle zuvor auf vorteilhaft einfache Weise in Längsrichtung auftrennen bzw. öffnen, um anschließend durch das seitliche Zurückschlagen der aufgetrennten Schutzhülle in Kombination mit den quer ausgerichteten Schwächungen eine vereinfachte Trennung in einer Art Schälvorgang von der Verpakkungswand vornehmen zu können. Die erfindungsgemäße Verpackung kann sowohl auf ihrer Vorderseite als auch auf ihrer Rückseite eine in Längsrichtung der Verpackung verlaufende Solltrennlinie in der Schutzhülle aufweisen, was das Auftrennen und Abschälen der Schutzhülle einer auf Transportpaletten gestapelten Verpackung mit Vorteil erleichtert.According to a development of the invention, it is provided that, in addition to a weakening element weakening the joint, each protective sheath has at least one desired separation line extending in the longitudinal direction of the package. With the help of trained as a longitudinal perforation for example predetermined breaking line, the protective cover can be split or open in an advantageous simple manner in the longitudinal direction, then by the lateral repelling of the separated protective cover in combination with the transversely aligned weakenings a simplified separation in a kind of peeling of the To be able to make Verpakkungswand. The packaging according to the invention can have both on its front side and on its rear side a predetermined separation line extending in the longitudinal direction of the packaging in the protective cover, which advantageously facilitates the separation and peeling of the protective cover of a packaging stacked on transport pallets.

Die Verpackungswand und die Schutzhülle weisen unterschiedliche Materialdicken auf. Die aus der Masse des verpackten Schüttgutes resultierende Gewichtskraft wird vollständig durch die den eigentlichen Träger ausbildende Verpackungswand aufgenommen, so daß für die Schutzhülle Folien mit wesentlich geringerer Materialdicke bzw. Materialstärke verwendet werden können. Somit läßt sich auf vorteilhafte Weise der Materialeinsatz zur Herstellung der erfindungsgemäßen Verpackung vermindern. Um sowohl vorgegebene Festigkeitswerte als auch ein vorteilhaft einfaches Abschälen der Schutzhülle zu gewährleisten, sollten vorzugsweise bestimmte Mindest- bzw. Höchstmaße für die gewählte Materialdicke der Schutzhülle nicht unter- bzw. überschritten werden. Derartige Schutzhüllen können beispielsweise eine Materialdicke bzw. -stärke im Bereich von 20 bis 100 µm aufweisen. Es ist ebenfalls möglich, daß die Schutzhülle und die Verpackungswand nahezu gleich große Materialdicken aufweisen. Selbstverständlich kann die von der Schutzhülle ummantelte Verpackungswand auch mehrlagig ausgebildet sein.The packaging wall and the protective cover have different material thicknesses. The weight resulting from the mass of the packaged bulk material is completely absorbed by the packaging wall forming the actual carrier, so that foils with a substantially smaller material thickness or material thickness can be used for the protective wrapper. Thus, the use of material for producing the packaging according to the invention can be advantageously reduced. In order to ensure both predetermined strength values and advantageously simple peeling off of the protective cover, preferably certain minimum or maximum dimensions for the selected material thickness of the protective cover should not be fallen below or exceeded. Such protective sheaths may for example have a material thickness or thickness in the range of 20 to 100 microns. It is also possible that the protective cover and the packaging wall have almost equal thicknesses of material. Of course, the enveloped by the protective cover packaging wall can also be designed in several layers.

Der Werkstoff für die Schutzhülle ist ein Kunststoff, zum Beispiel Polyethylen oder Polypropylen, dessen Verwendung sich für Kunststoffolien hinsichtlich optimaler mechanischer Eigenschaften und Verarbeitungsmöglichkeiten bewährt hat. Die Flexibilität des eingesetzten Kunststoffs ermöglicht die Ummantelung von Säcken unterschiedlichster Form und Größe. Des weiteren verhindert eine Kunststoffschutzhülle den Kontakt der Verpackungswand mit Feuchtigkeit, so daß mit Vorteil auch Verpackungsmittel oder Säcke aus Papier mit einer derartigen Schutzhülle ummantelt werden können. Gleichzeitig kann die Schutzhülle, aufgrund der Werkstoffeigenschaften des verwendeten Kunststoffes, die Alterungsbeständigkeit verbessern.The material for the protective cover is a plastic, for example polyethylene or polypropylene, whose use has proved successful for plastic films in terms of optimum mechanical properties and processing options. The flexibility of the plastic used allows the sheathing of bags of different shapes and sizes. Furthermore, prevents a plastic protective cover the contact of the packaging wall with moisture, so that with advantage packaging material or bags made of paper can be coated with such a protective cover. At the same time, the protective cover, due to the material properties of the plastic used, improve the aging resistance.

Nach einer nächsten Weiterbildung der Erfindung ist vorgesehen, daß die Verbindungsstelle als Schweißung ausgebildet ist. Insbesondere bei einer ebenfalls aus Kunststoff hergestellten Verpackungswand läßt sich jede Verbindungsstelle zwischen Verpackungswand und Schutzhülle über eine Schweißnaht vorteilhaft einfach und gegebenenfalls mit ausreichender Festigkeit erzeugen. Dabei kann die Verbindungsstelle zusammen mit einer die Innenseiten der Verpackungswand miteinander verbindenden Bodenschweißnaht ausgebildet werden. Es ist zum Beispiel auch möglich, eine Verbindungsstelle mit Hilfe von Klebeverfahren zu schaffen.According to a next development of the invention it is provided that the connection point is formed as a weld. In particular, in a likewise made of plastic packaging wall, any connection point between the packaging wall and protective cover over a weld advantageously can be easily and optionally produce sufficient strength. In this case, the connection point can be formed together with a bottom weld seam interconnecting the insides of the packaging wall. It is also possible, for example, to create a joint using adhesive methods.

Des weiteren ist ein Verfahren zur Herstellung einer Verpackung für Schüttgüter geschaffen, insbesondere zur Herstellung eines Sackes aus Kunststoffolie, bei dem erfindungsgemäß zumindest ein Schlauchabschnitt vorgefertigt wird, um den vorgefertigten Schlauchabschnitt in Längsrichtung eine mit wenigstens einem Schwächungsorgan ausgerüstete Materialbahn gelegt wird, einander überlappende Bereiche der Materialbahn miteinander verbunden und eine geschlossene Schutzhülle ausgebildet wird, die Schutzhülle und der Schlauchabschnitt zu einem Plattschlauch zusammengelegt werden, und wenigstens eine stoffschlüssige Verbindungsstelle zwischen der Schutzhülle und wenigstens einem Ende des Schlauchabschnittes erzeugt wird.Furthermore, a method for producing a package for bulk materials is provided, in particular for producing a bag made of plastic, in which according to the invention at least one tube section is prefabricated to the prefabricated tube section is placed in the longitudinal direction of a material web equipped with at least one weakening organ, overlapping areas of the Material web interconnected and a closed protective cover is formed, the protective cover and the hose section are folded together to form a flat hose, and at least one cohesive Joint between the protective cover and at least one end of the hose section is generated.

Mit Hilfe der erfindungsgemäßen Verfahrensschritte kann eine Verpakkung mit einer die Außenseite einer Verpackungswand abdeckenden Schutzhülle hergestellt werden, bei der sich, bewirkt durch die Schwächungsorgane im Bereich der Verbindungsstelle, kurz vor dem Entleeren des verpackten Schüttgutes, die äußere Hülle mit daran möglicherweise anhaftenden Verschmutzungen auf vorteilhaft einfache Weise entfernen läßt, so daß keine Verunreinigung des Schüttgutes in einer möglichen Weiterverarbeitung verursacht wird. Zur Herstellung der Verpackung können sowohl einzeln vorgefertigte Schlauchabschnitte als auch ein Endlosschlauch für die einen Träger ausbildende Verpackungswand verwendet werden, die von zumindest einem Abschnitt einer als Kunststoffolie vorliegenden Materialbahn ummantelt werden. Die Materialbahn weist in vorbestimmten Bereichen bzw. Abschnitten wenigstens ein, beispielsweise als Beschichtung und/oder Solltrennlinie ausgebildetes Schwächungsorgan auf, um eine Schwächung der die Schutzhülle mit der Verpackungswand verbindenden Verbindungsstelle und/oder der Umhüllung selbst zu bewirken. Die Breite der Materialbahn ist derart gewählt, daß die Seitenbereiche der Materialbahn nach dem Ummanteln der eine innere Hülle ausbildenden Verpackungswand einen einander überlappenden Bereich ausbilden. Der Überlapp-Bereich kann mittels Stoffschluß, wie zum Beispiel Verschweißen oder Verkleben, miteinander verbunden werden. Dadurch wird eine den Schlauchabschnitt bzw. den Endlosschlauch der inneren Hülle umgebende, geschlossene äußere Schutzhülle geschaffen, die zum Beispiel eine geklebte Längsnaht aufweist. Anschließend kann jeder Schlauchabschnitt bzw. der Endlosschlauch mit der die Verpackungswand ummantelnden Schutzhülle zu einem Plattschlauch zusammengelegt werden, in dessen Seitenbereichen auch zum Beispiel Seitenfalten eingelegt sein können. Nach dem Zusammenlegen wird, insbesondere bei der Herstellung von Einzelsäkken, wenigstens eine als Schweißung ausgebildete stoffschlüssige Verbindungsstelle zwischen der Schutzhülle und einem Ende des Schlauchabschnitts erzeugt. Das Herstellen der Verbindungsstelle kann auf vorteilhafte Weise zusammen mit einer die Innenseiten der Verpackungswand im Bodenbereich der erfindungsgemäßen Verpackung verschließenden Bodenschweißnaht erfolgen. Selbstverständlich können auch andere Fügeverfahren, wie zum Beispiel das Kleben, zum Herstellen einer stoffschlüssigen Verbindung eingesetzt werden. Unter Umständen ist es zur Ausbildung einer Verpackung notwendig, jeweils vorbestimmte Abschnitte von einem Endlosschlauch im Bereich einer jeweiligen Verbindungsstelle abzutrennen.With the aid of the method steps according to the invention, a packaging can be produced with a protective cover covering the outside of a packaging wall, in which, caused by the weakening elements in the region of the connection point, shortly before the emptying of the packed bulk material, the outer envelope with dirt possibly adhering to it is advantageous easy way to remove, so that no contamination of the bulk material is caused in a possible further processing. For the preparation of the packaging, individually prefabricated tube sections as well as an endless tube can be used for the packaging wall forming a carrier, which are encased by at least a portion of a material web present as a plastic film. The material web has in predetermined areas or sections at least one, for example, as a coating and / or predetermined breaking line trained weakening organ to effect a weakening of the protective sheath to the packaging wall connecting joint and / or the sheath itself. The width of the material web is chosen such that the side regions of the material web form a mutually overlapping region after the wrapping of the packaging wall forming an inner casing. The overlap area can be connected to each other by means of material closure, such as welding or gluing. As a result, a closed outer protective sheath surrounding the hose section or the endless hose of the inner sheath is provided, which has, for example, a glued longitudinal seam. Subsequently, each tube section or the endless tube with the protective wall enclosing the packaging wall can be folded together to form a flat tube, in the lateral areas of which gussets, for example, can also be inserted. After folding, in particular in the production of Einzelosäkken, at least one formed as a weld cohesive joint created between the protective cover and one end of the hose section. The production of the connection point can advantageously take place together with a bottom weld seam closing off the insides of the packaging wall in the bottom region of the packaging according to the invention. Of course, other joining methods, such as gluing, can be used for producing a cohesive connection. Under certain circumstances, it is necessary for the formation of a package to separate each predetermined sections of an endless tube in the region of a respective connection point.

Mehrere Ausführungsbeispiele der Erfindung, aus denen sich weitere erfinderische Merkmale ergeben, sind in der Zeichnung dargestellt. Es zeigen:

Fig. 1
eine perspektivische Ansicht eines ersten Ausführungsbeispiels eines Verpackungsmittels, und
Fig. 2:
eine perspektivische Ansicht eines zweiten Ausführungsbeispiels eines Verpackungsmittels.
Several embodiments of the invention, from which further inventive features result, are shown in the drawing. Show it:
Fig. 1
a perspective view of a first embodiment of a packaging means, and
Fig. 2:
a perspective view of a second embodiment of a packaging means.

Mit 1 ist ein im Bodenbereich 2 geschlossener und vorzugsweise mit Seitenfalten ausgerüsteter Sack bezeichnet, der eine das Schüttgut einhüllende Verpackungswand 3 aufweist. Die Verpackungswand 3 ist von einer Schutzhülle 4 ummantelt und es ist somit ein zweilagiger Sack 1 ausgebildet. Die Verpackungswand 3 und die Schutzhülle 4 weisen im Bodenbereich 2 eine gemeinsame Verbindungsstelle 5 auf. Im Bereich der als Schweißung ausgebildeten Verbindungsstelle 5 ist zwischen der Verpackungswand 3 und der Schutzhülle 4 ein als aufgetragene Beschichtung 6 ausgebildetes Schwächungsorgan vorhanden. Die Beschichtung 6 läßt sich sowohl auf der Innenseite der Schutzhülle 4 als auch auf der Außenseite der Verpackungswand 3 auftragen und ist im Bodenbereich 2 und an einer oberen Einfüllöffnung 7 des Sackes 1 angeordnet, was insbesondere das Abschälen der Schutzhülle 4 von der Verpackungswand 3 vereinfacht. Des weiteren weist die Schutzhülle 4 der erfindungsgemäßen Verpackung auf der Vorderseite 8 und gegebenenfalls auch auf der Rückseite 9 des Sackes 1 eine als Längsperforation ausgebildete Solltrennlinie 10 auf. Mit Hilfe der Solltrennlinie 10 läßt sich die Schutzhülle 4 in Längsrichtung auftrennen, was das Abschälen der Schutzhülle 4 von der Verpackungswand 3 zusätzlich erleichtert.1 denotes a bag closed in the bottom region 2 and preferably equipped with gussets, which has a packaging wall 3 enveloping the bulk material. The packaging wall 3 is encased by a protective cover 4 and thus a two-ply bag 1 is formed. The packaging wall 3 and the protective cover 4 have in the bottom region 2 a common connection point 5. In the area of the joint 5 formed as a weld, a weakening element embodied as a coated coating 6 is present between the packaging wall 3 and the protective covering 4. The coating 6 can be applied both on the inside of the protective cover 4 and on the outside of the packaging wall 3 and is arranged in the bottom region 2 and at an upper filling opening 7 of the bag 1, which in particular simplifies the peeling off of the protective cover 4 from the packaging wall 3. Furthermore, the protective cover 4 of the packaging according to the invention on the front side 8 and optionally also on the back 9 of the bag 1 has a designed as a longitudinal perforation predetermined separation line 10. With the help of the predetermined breaking line 10, the protective cover 4 can be separated in the longitudinal direction, which additionally facilitates the peeling off of the protective cover 4 from the packaging wall 3.

Fig. 2 zeigt ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Verpackung. Die Schutzhülle 11 des Seitenfalten-Sackes 12 weist dabei an Stelle einer Beschichtung 6 (Fig. 1), insbesondere im Bodenbereich 13 und an einer oberen Einfüllöffnung14 eine umlaufende, als Querperforation ausgebildete Schwächungslinie 15 auf, die das Entfernen der Schutzhülle 11 von der Verpackungswand 4 gewährleistet. Ebenso wie im ersten Ausführungsbeispiel, ist an der Schutzhülle 11 eine Solltrennlinie 10 sowohl auf der Vorderseite 8 als auch gegebenenfalls auf der Rückseite 9 des Sackes 12 ausgebildet.Fig. 2 shows another embodiment of a package according to the invention. The protective covering 11 of the gusseted sack 12 has, instead of a coating 6 (FIG. 1), in particular in the bottom region 13 and at an upper filling opening 14, a peripheral weakening line 15 formed as a transverse perforation, which comprises removing the protective covering 11 from the packaging wall 4 guaranteed. As in the first embodiment, a predetermined breaking line 10 is formed on the protective cover 11 both on the front side 8 and optionally on the rear side 9 of the bag 12.

Claims (11)

Verpackung für Schüttgüter, insbesondere Sack aus Kunststoffolie, mit einer das Schüttgut einhüllenden Verpackungswand,
dadurch gekennzeichnet,
daß wenigstens ein Teil der Verpackungswand (3) mindestens eine äußere Schutzhülle (4, 11) aufweist,
daß die Schutzhülle (4, 11) und die Verpackungswand (3) in vorbestimmten Bereichen wenigstens eine gemeinsame Verbindungsstelle (5) aufweisen, und
daß jede Verbindungsstelle (5) zumindest ein Schwächungsorgan aufweist.
Packaging for bulk materials, in particular a bag made of plastic film, with a packaging wall enveloping the bulk material,
characterized,
that at least a part of the packaging wall (3) at least one outer protective sheath (4, 11),
that the protective sheath (4, 11) and the packaging wall (3) in predetermined areas of at least one common connection point (5), and
in that each connection point (5) has at least one weakening element.
Verpackung nach Anspruch 1, dadurch gekennzeichnet, daß das Schwächungsorgan eine die Verbindungsstelle (5) schwächende Beschichtung (6) ist, die zwischen der Schutzhülle (4) und der Verpackungswand (3) aufgetragen ist.Packaging according to claim 1, characterized in that the weakening member is a coating (6) which weakens the joint (5) and is applied between the protective casing (4) and the packaging wall (3). Verpackung nach Anspruch 2, dadurch gekennzeichnet, daß die Beschichtung (6) abschnittsweise aufgetragen ist.Packaging according to claim 2, characterized in that the coating (6) is applied in sections. Verpackung nach einem der Ansprüche 2 und 3, dadurch gekennzeichnet, daß die Beschichtung (6) ein Trennlack ist.Packaging according to one of claims 2 and 3, characterized in that the coating (6) is a release varnish. Verpackung nach Anspruch 1, dadurch gekennzeichnet, daß das Schwächungsorgan durch wenigstens eine Schwächungslinie (15) in der Schutzhülle (11) ausgebildet ist.Packaging according to claim 1, characterized in that the weakening member is formed by at least one weakening line (15) in the protective cover (11). Verpackung nach Anspruch 1, dadurch gekennzeichnet, daß das Schwächungsorgan mittels einer vorbestimmten Materialkombination für die Verpackungswand und die Schutzhülle ausgebildet ist.Packaging according to claim 1, characterized in that the weakening member is formed by means of a predetermined combination of materials for the packaging wall and the protective cover. Verpackung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Schutzhülle (4, 11) wenigstens eine in Längsrichtung der Verpackung verlaufende Solltrennlinie (10) aufweist.Packaging according to one of claims 1 to 6, characterized in that the protective cover (4, 11) has at least one predetermined separation line (10) extending in the longitudinal direction of the package. Verpackung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Verpackungswand (3) und die Schutzhülle (4, 11) unterschiedliche Materialdicken aufweisen.Packaging according to one of claims 1 to 7, characterized in that the packaging wall (3) and the protective cover (4, 11) have different material thicknesses. Verpackung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der Werkstoff für die Schutzhülle (4, 11) ein Kunststoff ist.Packaging according to one of claims 1 to 8, characterized in that the material for the protective cover (4, 11) is a plastic. Verpackung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Verbindungsstelle (5) als Schweißung ausgebildet ist.Packaging according to one of claims 1 to 9, characterized in that the connection point (5) is designed as a weld. Verfahren zur Herstellung einer Vorrichtung zum Verpacken von Schüttgütern, insbesondere zur Herstellung eines Sackes aus Kunststoffolie, vorzugsweise nach einem der Ansprüche 1 bis 10, bei dem zumindest ein Schlauchabschnitt vorgefertigt wird,
um den vorgefertigten Schlauchabschnitt in Längsrichtung eine mit wenigstens einem Schwächungsorgan ausgerüstete Materialbahn gelegt wird,
einander überlappende Bereiche der Materialbahn miteinander verbunden und eine geschlossene Schutzhülle ausgebildet wird,
die Schutzhülle und der Schlauchabschnitt zu einem Plattschlauch zusammengelegt werden, und daß
wenigstens eine stoffschlüssige Verbindungsstelle zwischen der Schutzhülle und wenigstens einem Ende des Schlauchabschnittes erzeugt wird.
Method for producing a device for packaging bulk materials, in particular for producing a bag made of plastic film, preferably according to one of claims 1 to 10, in which at least one tube section is prefabricated,
a material web equipped with at least one weakening element is laid around the prefabricated hose section in the longitudinal direction,
overlapping areas of the material web are connected together and a closed protective cover is formed,
the protective cover and the tube section are folded into a flat tube, and that
at least one cohesive connection point between the protective cover and at least one end of the hose section is generated.
EP07001715A 2006-04-26 2007-01-26 Packaging for bulk goods and method for producing such packaging Active EP1849709B1 (en)

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DE102006019271A DE102006019271A1 (en) 2006-04-26 2006-04-26 Bulk goods packaging and method of making such a package

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AT (1) ATE428645T1 (en)
DE (2) DE102006019271A1 (en)
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Cited By (1)

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Publication number Priority date Publication date Assignee Title
EP3795492A1 (en) * 2019-09-19 2021-03-24 Coveris Flexibles Deutschland GmbH & Co. KG Recyclable package, in particular square ended bag

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
CN103786946B (en) * 2014-03-04 2017-01-11 林绮玲 Accordion-edge square-bottom packaging bag and manufacturing method thereof
DE102024113956A1 (en) * 2024-05-17 2025-11-20 Dy-Pack Verpackungen Gustav Dyckerhoff Gmbh Multi-layered paper bag

Citations (2)

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Publication number Priority date Publication date Assignee Title
US5728037A (en) * 1992-11-17 1998-03-17 Union Camp Corporation Environmentally friendly pinch bottom bag assembly and method of making
WO2002028724A2 (en) 2000-10-02 2002-04-11 Michael Clements Markham Multi-layered bag and method of manufacture

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5728037A (en) * 1992-11-17 1998-03-17 Union Camp Corporation Environmentally friendly pinch bottom bag assembly and method of making
WO2002028724A2 (en) 2000-10-02 2002-04-11 Michael Clements Markham Multi-layered bag and method of manufacture

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Publication number Priority date Publication date Assignee Title
EP3795492A1 (en) * 2019-09-19 2021-03-24 Coveris Flexibles Deutschland GmbH & Co. KG Recyclable package, in particular square ended bag

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DE102006019271A1 (en) 2007-10-31
ATE428645T1 (en) 2009-05-15
DK1849709T3 (en) 2009-08-10
DE502007000606D1 (en) 2009-05-28
PT1849709E (en) 2009-07-14
EP1849709B1 (en) 2009-04-15
PL1849709T3 (en) 2009-09-30

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