EP2284081B1 - Procédé et film tubulaire pour la fabrication de récipients d'emballage ainsi que le récipient obtenu - Google Patents

Procédé et film tubulaire pour la fabrication de récipients d'emballage ainsi que le récipient obtenu Download PDF

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Publication number
EP2284081B1
EP2284081B1 EP09010422A EP09010422A EP2284081B1 EP 2284081 B1 EP2284081 B1 EP 2284081B1 EP 09010422 A EP09010422 A EP 09010422A EP 09010422 A EP09010422 A EP 09010422A EP 2284081 B1 EP2284081 B1 EP 2284081B1
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EP
European Patent Office
Prior art keywords
seam
film
tube
longitudinal
longitudinal seam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP09010422A
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German (de)
English (en)
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EP2284081A1 (fr
Inventor
Jürgen Sundermann
Klaus Schilling
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.)
Bischof and Klein SE and Co KG
Original Assignee
Bischof and Klein SE and Co KG
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
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Priority to AT09010422T priority Critical patent/ATE545586T1/de
Priority to EP09010422A priority patent/EP2284081B1/fr
Publication of EP2284081A1 publication Critical patent/EP2284081A1/fr
Application granted granted Critical
Publication of EP2284081B1 publication Critical patent/EP2284081B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5855—Peelable seals

Definitions

  • the invention relates to a method for producing packaging containers according to the preamble of claim 1 and to a film tube provided for this purpose according to the preamble of claim 14 and finally to a packaging container according to the preamble of claim 18.
  • Packaging container made of flat film with at least on the inside sealability or weldability, which is initially folded tubular, are extremely inexpensive to manufacture and lightweight, robust and also tightly executable for storage and transport and for sales presentation.
  • these properties are generally opposed to easy opening of such packaging containers.
  • packaging containers that are easily torn from the material or contain perforations for tearing.
  • this then leads to restrictions with regard to the robustness and / or the tightness of the packaging container.
  • FFS form fill and seal
  • a hand-tearable tubular bag packaging which is to be used in particular in the food industry, is from the DE 10 2004 031 203 known.
  • a multilayer film is provided which on the outside has a sealing layer for a solid sealed seam, wherein the sealing layer is underlaid on at least one side in a strip-shaped edge region with a pressure-sensitive adhesive layer.
  • the thin, easily breakable sealing layer is torn to open along the sealing seam and detached in the edge region of the pressure-sensitive adhesive layer, which also results in a resealable opening.
  • this packaging requires a very complex, not by coextrusion of the layers but by laminating and lamination to be produced layering.
  • the sealing seams themselves are firm, but only connect the thin sealing layers to a less strong connection.
  • the US 4,337,862 discloses a paper bag in which the seams are made with a hot melt adhesive applied flat.
  • the easy-to-tear paper bags are prone to uncontrolled and fissured cracking. This is to be avoided by first treating the paper with an agent which has release properties to the adhesive.
  • a longitudinal seam is formed as a fin seam with a protruding strip on one side, which is convenient to capture and allows the packaging of the longitudinal seam to a side edge.
  • the high strength which occurs during conventional sealing between polyethylene materials is to be reduced by changing the seal width, the sealing temperature, the sealing pressure or the duration of sealing. In practice, such an adjustment to an imperfect seal with reduced strength does not appear reliably realizable.
  • the filling of the packaging container can be done in a conventional manner in a course with the folding and longitudinal sealing of the flat film to a tube, wherein a filling member of the machine still opens from above through a not yet longitudinally sealed portion of the film into the tube shape.
  • Another common filling technique provides that a film tube, which is supplied for example in roll form, divided by spaced transverse seams and separated by separating a piece of tubing behind the transverse seam to an open packaging container, which is then subsequently filled in each case and closed by a top seam.
  • the object of the invention is to provide a packaging container made of film regardless of the requirements of the strength and tightness and while maintaining a low-cost To design the manufacturing process so that it can be opened as possible by hand and without the aid of tools.
  • the object of the invention is furthermore to provide a method and a film tube for such a packaging container.
  • this object is achieved in that the longitudinal seam is formed as a hand tearable seam.
  • the longitudinal seam has to withstand much lower transport and bearing loads than the transverse seam and, in particular, when it runs flat on a wall of a packaging container, scarcely dangerous peel loads, but rather is exposed to the less critical shear loads within a wall plane .
  • This can be used to ensure that the longitudinal seam is much less peelable than the transverse seams - "peelable" - and can then be easily torn open by hand by adjacent wall areas are pulled apart.
  • the use of limited peel strength of the longitudinal seam is further supported by the fact that it can be raised in places from an initial region or end region of the longitudinal seam, and the limited peel strength of the longitudinal seam can only be selectively overcome in each case.
  • the edges of the flat film to be joined together can be stacked flat in such a way that the outside a bottom foil comes to the edge of the inside of a film overlying the plant.
  • an initially upstanding "fin seam" can be formed by folding the inner sides of the film, but then in the sense of a flat wall of the packaging container and also for suppression From the peeling stresses on one side or the other side folded flat and possibly even to the adjacent wall strips - preferably solvable - is anfixiert.
  • the longitudinal seam can be torn by hand and is preferably formed only with limited peel strength, it can be "weakened" by known means by applying, for example, a release lacquer overprint prior to the sealing or welding process, which sets the material connection at the seam to a fraction of Connection points, strips o. The like. Reduced.
  • the sealability of the surfaces in the seam area can be reduced at least on one side by corona pretreatment. If an adhesive seam is provided in the case of a sealed seam, a binding effect can be selected from the adhesive with which this seam is less firm than the seal transverse seams of the packaging container which are to be formed sturdily.
  • An advantage of the corresponding production method is that fundamentally familiar and proven method steps and also known and existing machines or systems can be used, wherein only in the training the longitudinal seam, the appropriate measures are provided which allow a tearable by hand.
  • the film tube can already be supplied by the supplier with such a hand-tearable seam.
  • FIG. 1 An in Fig. 1 Overall illustrated packaging container 1 is formed from a strip of flat film, which is merged with merging of the two opposite edges to the tube shape and bound by a longitudinal seam 2 in tube form.
  • a continuous hose can be used in modern FFS machines (form, fill and seal) for packaging and filling.
  • the tube shape is regularly before filling at one end with a transverse seam.
  • 3 Bottom seam
  • the tube shape could indeed be supplied from bottom to top to attach the final transverse seam after filling and at the same time separate the packaging container on the underside behind the bottom seam. It is more common, however, to unwind the hose from a hose reel and to provide one-way open individual containers prior to filling by attaching a (bottom-side) cross-seam and separating it from the hose behind the cross-seam.
  • the in Fig. 1 illustrated packaging container 1 has an approximate parallelepiped shape with two opposite main walls 5,6 and two intermediate side walls 7,8, wherein it can remain open whether the side walls 7,8 formed as gusseted walls and folded into the transverse seams 3,7 or welded or whether the transverse seams 3,4 seal together the flat-squashed outlet tube without lateral folds.
  • transverse seams are usually created by heat sealing, for which purpose the film as a whole or at least with an inner layer is sealable.
  • the common description of a "sealable" (inner) layer does not exclude that the outer layer it should also be said that at sealing, the lower-melting layers combine and the higher-melting layers remain unchanged.
  • the cross-seams are typically exposed to high loads during machine filling with a short power stroke and, accordingly, must be sufficiently tight.
  • the loads are particularly critical peel loads, with which the converging to the transverse seam panels are pulled apart and record this peel stress not with the whole seam surface, but at the edge of the seam.
  • the strength concept for the packaging container therefore requires solid sealing seams.
  • a tool-free opening so typically a tearing by hand, is not considered in the cross-seams.
  • some predetermined weakening critical as tear points for the packaging container Perforations as a general Aufr Galliereweg come due to the associated leaks regularly out of the question.
  • the longitudinal seam is also provided in the sense of a smooth outer contour.
  • the seam is intrinsically close to a wall of the packaging container, such as the main wall 5 according to Fig. 1 to apply.
  • the flat seam in the transverse seams 3 and 4 on the one hand and the bulge of the full packaging container further promote the flat seam formation.
  • the longitudinal seam can thus be designed peelable so that it is subjected to shear forces under normal loads and intercepts them, while a locally forced peeling stress when tearing by hand can lead to easy release.
  • the longitudinal seam can be formed both as a sealing seam and as an adhesive seam (weld seam) in order to use common welding-sealing or adhesive techniques.
  • Examples of the seams of interest in the context are the Fig. 2 to 5 shown.
  • Fig. 2 is between two superposed edge portions 9,10 of a formed with a longitudinal seam 11 to a tube film strip to provide a sealed seam, in which so the films by heat and pressure of a corresponding sealing tool - for example, a sealing roller - are brought together to form a seam. Since the film edges come into contact with different sides (outside on the inside), a multilayer film with (for the transverse seams on the inside sealable layer) could be provided when this layer achieves a lower but still acceptable adhesion to the outside. In general, however, a sealed seam according to Fig. 2 between an inside and an outside then provided when it is a single-layer film material or when the film is inside and outside equipped with a sealable layer.
  • the area of the sealed seam (enlarged in width over this by tolerance strips) can be prepared by known means.
  • the strength of the sealed seam can be reduced overall by corona pretreatment.
  • More widespread is the application of a release coat application to one of the two surfaces to be bonded together, typically in the form of suitable patterns for the predetermined distribution of sealing and non-sealing areas within the seam. Patterns for a release coating job in grid, stripe, checkerboard or diamond form can be found in the Fig. 6 to 9 illustrated.
  • the thus formed longitudinal seam 11 between the flat superimposed film edges 9,10 is charged in the usual loads of such a packaging container mainly on the entire surface shear.
  • the outer film 9 with a projection 12 via provided the sealing seam, which allows grasping the film by hand and tearing.
  • a projection can be provided continuously, in order to provide a "non-rapport" film tube (without predetermined length sections for the individual packaging containers). But it can also be provided in places limited grip areas, in particular in coordination with a predetermined repeat.
  • Fig. 3 are film edges 9,10 as in Fig. 2 provided, between which an adhesive seam 13, such as with a (low-melting) adhesive, such as an easy-to-apply "hot-melt” adhesive is attached.
  • the adhesive seam 13 is determined in terms of strength by an adhesive application 14 and also by a release coating application 15, wherein the release coating application 15 is only dispensable if the predetermined strength values of the adhesive seam are already inherent.
  • a longitudinal seam in the form of a flattened "fin seam" after Fig. 4 is arranged as an adhesive seam between the inner sides of two film edges 17 and 18 which are to be joined during tube forming and comprises an adhesive bead 19 applied on one side and a release coat 20 provided on the other side which, given the tolerances during the application of the adhesive bead 19, again is wider than this becomes.
  • Such a fin seam may tend to protrude transversely to the film edges 17 and 18 after tube production.
  • the fin seam With the production of the transverse seams and also with the filling of the packaging container, the fin seam becomes common folded and forced into a flat contact with one of the film edges, here film edge 17.
  • the film edge 17 can still receive adhesive dots 21 or a continuous adhesive application on its outer side in order to keep the fin seam folded.
  • FIG. 5 An in Fig. 5 illustrated embodiment of a sealed joint between two film edges 17 and 18 looks - as in the embodiment according to Fig. 2 - a release coating application in strip form within which a seal (not shown) is made into a fin seam.
  • the fin seams after 4 and 5 offer manufacturing technology, since the film tube is to bring together by a simple folding with the edges and thereby the seal or the adhesive application for the longitudinal seam are affected only the edges to be joined. It is understood that the longitudinal seam does not necessarily have to be continuously peelable. An only partially peelable longitudinal seam can be sufficient for tearing a sufficiently large discharge opening. This applies in particular to film hoses with a specified repeat.
  • the manually tearable longitudinal seam is not only of interest for packaging containers which are produced from a ("endless") prefabricated film tube, in particular in the FFS process.
  • other packaging containers which are prefabricated individually at the factory except for one filling opening, can also be provided with such a tearable longitudinal seam.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Bag Frames (AREA)

Claims (14)

  1. Procédé de fabrication de récipients d'emballage (1) en film monocouche ou multicouche qui peut être scellé ou soudé au moins avec une couche intérieure et qui est plié en forme de tuyau à partir d'un film plat et qui est formé en forme de tuyau avec une soudure longitudinale (2) entre les bords longitudinaux (9, 10, 17, 18) pliés, lequel tuyau est fermé côté inférieur par une soudure de fond (3) transversale pour former d'abord un récipient d'emballage ouvert et coupé derrière la soudure de fond (3) et aussi fermé côté supérieur par une autre soudure de tête (4) transversale, dans lequel la soudure longitudinale (2) est réalisée au moins par section sous forme de joint scellé déchirable à la main, caractérisé en ce que le film est pré-traité par bande au niveau d'au moins un des bords longitudinaux dans la zone de la soudure longitudinale (2) à appliquer avec un démoulant ou un traitement corona pour réduire la résistance au pelage.
  2. Procédé de fabrication de récipients d'emballage (1) en film monocouche ou multicouche qui peut être scellé ou soudé au moins avec une couche intérieure et qui est plié en forme de tuyau à partir d' un film plat et qui est formé en forme de tuyau avec une soudure longitudinale (2) entre les bords longitudinaux (9, 10, 17, 18) pliés, lequel tuyau est fermé côté inférieur par une soudure de fond (3) transversale pour former d'abord un récipient d'emballage ouvert et coupé derrière la soudure de fond (3) et aussi fermé côté supérieur par une autre soudure de tête (4) transversale, dans lequel la soudure longitudinale (2) est réalisée au moins par section sous forme de joint scellé déchirable à la main, caractérisé en ce que la soudure longitudinale est réalisée sous forme de joint collé (13, 16) avec application d'un adhésif (14, 19) sur au moins un des bords longitudinaux (9, 18) du film plat.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la soudure longitudinale (2) est appliquée au niveau de bords (9, 10) superposés à plat du film avec un côté intérieur sur un côté extérieur.
  4. Procédé selon la revendication 1 ou 2, caractérisé en ce que la soudure longitudinale (2) est placée sous forme de joint aileron (16, 23) entre deux bords (17, 18) mis bout à bout avec les côtés intérieurs du film et est appliquée sous forme de bande de joint aileron à plat au niveau d'une des zones de bord (17) adjacente du film.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le film est enroulé avant l'application des soudures de fond et de tête sous forme de tuyau continu en un rouleau transportable et entreposable.
  6. Procédé selon la revendication 5, caractérisé en ce que le film est mis en pli en forme de tuyau avant l'enroulage, dans lequel pli des plissements latéraux prennent déjà la forme de plis latéraux des récipients d'emballage à fabriquer.
  7. Procédé selon la revendication 5 ou 6, caractérisé en ce que le film en forme de tuyau est doté au moins par endroits d'une zone de préhension (12, 22) dépassant de la soudure longitudinale d'au moins un des bords longitudinaux.
  8. Procédé selon la revendication 7, caractérisé en ce que la zone de préhension est réalisée sous forme de bande de préhension (12, 22) en saillie continue.
  9. Procédé selon la revendication 7 ou 8, caractérisé en ce que la zone de préhension (12, 22) est réalisée au niveau d'un bord longitudinal (10, 18) situé en haut.
  10. Film tubulaire pour la fabrication de récipients d'emballage selon le procédé FFS (procédé Form, Fill and Seal) avec une soudure longitudinale (2) reliant deux zones de bord (9, 10, 17, 18) pliées en forme de tuyau d'un film plat monocouche ou multicouche, dans lequel le film peut être scellé ou soudé au moins avec une couche située à l'intérieur du film tubulaire, caractérisé en ce que la soudure longitudinale (2) est réalisée sous forme de joint scellé déchirable à la main, dans lequel le film est pré-traité par bande au niveau d'au moins un des bords longitudinaux dans la zone de la soudure longitudinale (2) avec un démoulant ou un traitement corona pour réduire la résistance au pelage.
  11. Film tubulaire pour la fabrication de récipients d'emballage selon le procédé FFS (procédé Form, Fill and Seal) avec une soudure longitudinale (2) reliant deux zones de bord (9, 10, 17, 18) pliées en forme de tuyau d'un film plat monocouche ou multicouche, dans lequel le film peut être scellé ou soudé au moins avec une couche située à l'intérieur du film tubulaire et la soudure longitudinale est réalisée sous forme de joint déchirable à la main, caractérisé en ce que la soudure longitudinale (2) est réalisée sous forme de joint collé (13, 16).
  12. Film tubulaire selon la revendication 10 ou 11, caractérisé en ce que le film est doté au moins par endroits d'une zone de préhension (12, 22) dépassant de la soudure longitudinale (2).
  13. Récipient d'emballage (1) en film monocouche ou multicouche qui peut être scellé ou soudé au moins avec une couche intérieure et qui est plié en forme de tuyau à partir d'un film plat et qui est formé en forme de tuyau avec une soudure longitudinale (2) entre les bords longitudinaux (9, 10, 17, 18) pliés, lequel tuyau est fermé côté inférieur par une soudure de fond (3) transversale et aussi fermé côté supérieur par une autre soudure de tête (4) transversale, dans lequel la soudure longitudinale (2) est réalisée au moins par section sous forme de joint scellé déchirable à la main, caractérisé en ce que la soudure longitudinale s'étend sur une bande pré-traitée avec un démoulant ou un traitement corona pour réduire la résistance au pelage.
  14. Récipient d'emballage (1) en film monocouche ou multicouche qui peut être scellé ou soudé au moins avec une couche intérieure et qui est plié en forme de tuyau à partir d'un film plat et qui est formé en forme de tuyau avec une soudure longitudinale (2) entre les bords longitudinaux (9, 10, 17, 18) pliés, lequel tuyau est fermé côté inférieur par une soudure de fond (3) transversale et aussi fermé côté supérieur par une autre soudure de tête (4) transversale, dans lequel la soudure longitudinale (2) est réalisée au moins par section sous forme de joint déchirable à la main, caractérisé en ce que la soudure longitudinale est réalisée sous forme de joint collé (13, 16) avec un adhésif (14, 19) appliqué sur au moins un des bords longitudinaux (9, 18) du film plat.
EP09010422A 2009-08-13 2009-08-13 Procédé et film tubulaire pour la fabrication de récipients d'emballage ainsi que le récipient obtenu Active EP2284081B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT09010422T ATE545586T1 (de) 2009-08-13 2009-08-13 Verfahren und folienschlauch zur herstellung von verpackungsbehältern sowie verpackungsbehälter hieraus
EP09010422A EP2284081B1 (fr) 2009-08-13 2009-08-13 Procédé et film tubulaire pour la fabrication de récipients d'emballage ainsi que le récipient obtenu

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09010422A EP2284081B1 (fr) 2009-08-13 2009-08-13 Procédé et film tubulaire pour la fabrication de récipients d'emballage ainsi que le récipient obtenu

Publications (2)

Publication Number Publication Date
EP2284081A1 EP2284081A1 (fr) 2011-02-16
EP2284081B1 true EP2284081B1 (fr) 2012-02-15

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EP09010422A Active EP2284081B1 (fr) 2009-08-13 2009-08-13 Procédé et film tubulaire pour la fabrication de récipients d'emballage ainsi que le récipient obtenu

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AT (1) ATE545586T1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6891390B2 (ja) * 2015-08-17 2021-06-18 凸版印刷株式会社 包装袋

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL167926C (nl) * 1970-06-09 1982-02-16 Heijmeijer L J Ver Fab Werkwijze en inrichting voor het vervaardigen van wikkels.
GB2003449B (en) * 1977-09-02 1982-07-07 Pharmachem Corp Peelable seal
AU524792B2 (en) 1978-01-09 1982-10-07 The Wiggins Teape Group Limited Flexible packaging material
GB8322885D0 (en) * 1983-08-25 1983-09-28 Sanders B Containers
JP3301319B2 (ja) * 1996-09-30 2002-07-15 ソニー株式会社 オーバーラップフィルムによる包装構造
GB2337242A (en) 1998-05-15 1999-11-17 Dairy Crest Limited Package with peelable seal
CA2490889C (fr) * 2002-06-27 2009-04-14 Pliant Corporation Film a scellage chevauchant avec couche d'arrachage
US20040166261A1 (en) * 2003-02-20 2004-08-26 Pockat Gregory Robert Heat-shrinkable packaging receptacle
DE102004031203A1 (de) 2004-06-28 2006-01-19 Wipak Walsrode Gmbh & Co. Kg Siegelbare Verbundfolie und deren Verwendung zur Herstellung eines Schlauchbeutels

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ATE545586T1 (de) 2012-03-15
EP2284081A1 (fr) 2011-02-16

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