EP2822867B2 - Sachet à soufflets latéraux constitué d'un tissu composite en matière synthétique et son procédé de fabrication - Google Patents

Sachet à soufflets latéraux constitué d'un tissu composite en matière synthétique et son procédé de fabrication Download PDF

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Publication number
EP2822867B2
EP2822867B2 EP13703630.7A EP13703630A EP2822867B2 EP 2822867 B2 EP2822867 B2 EP 2822867B2 EP 13703630 A EP13703630 A EP 13703630A EP 2822867 B2 EP2822867 B2 EP 2822867B2
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EP
European Patent Office
Prior art keywords
tube
material web
gusset
plastic fabric
gusseted
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.)
Not-in-force
Application number
EP13703630.7A
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German (de)
English (en)
Other versions
EP2822867A1 (fr
EP2822867B1 (fr
Inventor
Detlef Stöppelmann
Jochen Brauer
Jens Kösters
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 Halle GmbH
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Mondi Halle GmbH
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Filing date
Publication date
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Application filed by Mondi Halle GmbH filed Critical Mondi Halle GmbH
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Publication of EP2822867B2 publication Critical patent/EP2822867B2/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D29/00—Sacks or like containers made of fabrics; Flexible containers of open-work, e.g. net-like construction
    • B65D29/02—Sacks with laminated or multiple walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/26—Folding sheets, blanks or webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/60—Uniting opposed surfaces or edges; Taping
    • B31B50/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure, e.g. by welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74—Auxiliary operations
    • B31B50/88—Printing; Embossing
    • 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
    • B65D31/02—Bags or like containers made of paper and having structural provision for thickness of contents with laminated 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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/18—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/001—Flexible containers made from webs by folding webs longitudinally
    • B31B2155/0012—Flexible containers made from webs by folding webs longitudinally having their openings facing in the direction of movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2170/00—Construction of flexible containers
    • B31B2170/20—Construction of flexible containers having multi-layered walls, e.g. laminated or lined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/26—Folding sheets, blanks or webs
    • B31B70/262—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement
    • B31B70/266—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement involving gusset-forming

Definitions

  • the present invention relates to a method for producing a gusseted bag according to the preamble of claim 1.
  • the flat gusseted bag is separated from a gusseted tube and is usually closed at only one of its two ends in order to be filled and finally completely closed by the other end.
  • the filled gusseted bag is intended as a packaging bag, in particular for pourable filling goods such as pelletized pet food, bedding for animals or similar materials.
  • a generic method and a flat gusseted bag are from the BE 511 327 A known.
  • gusset bags made of a composite plastic fabric are known.
  • the side gussets extend over a maximum of one third of the width of the front walls, ie over a maximum of one third of the width of the flat gusseted bag.
  • the plastic fabric is usually formed from a heat-sealable material, a tight seal is not possible or at most possible due to the fabric structure.
  • a side gusset tube is formed from a plastic fabric in such a way that edge sections of the material web overlap, the first side of the material web associated with the outer edge portion being then connected by an adhesive to the second side assigned to the inner edge portion around the side gusset tube close.
  • a material web is first formed into a gusseted tube, the edges of the material web overlapping in an area between the gussets and being connected there by an adhesive after the gusseted tube has been formed.
  • adhesives such as solvent-based adhesives or hot-melt adhesives can be used as adhesives.
  • an adhesive made of a molten polymer is also suitable as an adhesive, which brings about a connection in the overlap region by the application of force.
  • the overlap area in the known designs of gusseted bags made of a plastic-fabric composite is always arranged approximately centrally on one of the front walls between the two gussets. Due to the visual impairment, this front wall usually forms the back of the gusseted bag. Nevertheless, the overlap area running approximately in the center of the rear can be perceived as disturbing, in particular if a print is also provided there. Finally, the design options for the known side-gusset bags formed from a composite plastic fabric are considerably restricted.
  • the invention has for its object to provide a method for producing a gusseted bag from a plastic fabric composite.
  • the object of the invention and the solution to the problem is a method for producing a gusseted bag according to claim 1.
  • the side gusset bag formed in the method according to the invention is particularly suitable for large containers, which have a considerable filling volume and a considerable filling weight, due to the use of the plastic fabric composite.
  • Corresponding gusseted bags are also referred to in practice as gusseted bags, although these terms are not distinguished within the scope of the present invention.
  • the plastic fabric composite comprises a plastic fabric and at least one closed plastic layer, the plastic fabric usually being arranged on the inside of the packaging bag.
  • a material web with a plastic fabric and at least one closed plastic layer is fed and shaped into a tube such that edge sections of the material web overlap and that a first side of the material web overlaps the inner surface and a second side of the material web form the outer surface.
  • the first side of the material web assigned to the outer edge section is connected to the second side assigned to the inner edge section by an adhesive in order to close the circumference of the hose.
  • Common adhesives such as solvent-based adhesives or hot-melt adhesives are suitable as adhesives.
  • a molten plastic can also be provided as an adhesive.
  • adhesive thus encompasses conventional adhesives in the context of the invention, but is not limited to such Adhesives limited.
  • a simple hose is first formed. When laid flat, this simple hose is formed from two layers of the material web, at least outside the overlap area.
  • the tube is first closed and then subsequently fed to a folding device with which a flat gusseted tube with opposite front walls, intermediate gussets and folded edges is formed between the front walls and the gussets, so that the gusseted tube, at least outside the overlap area, on the gussets has four layers and two layers of the material web between the gussets.
  • the connection at the overlap area first forms a closed tube and only then a flat gusseted tube, the overlap area can be positioned largely freely. It is thus provided that the overlap area is at least partially arranged in a section of the gusseted tube formed from four layers of the material web. The overlap area is therefore either on one of the side folds or on a front wall on one of the side folds.
  • the overlap area extends beyond one of the folded edges.
  • the overlap area can easily be placed directly against one of the folded edges.
  • Pieces of tubing are separated from the gusseted tube to form individual gusseted bags.
  • the separation is usually carried out in the context of the invention without previously winding up the gusseted tube. Due to the arrangement of the overlap area in the area of one of the side gussets, winding is disadvantageous because a roll with a non-uniform thickness would then be produced during winding.
  • the material web is preferably formed by laminating the plastic fabric with a film, the plastic fabric forming the surface on the first side and the film forming the surface on the second side of the material web.
  • lamination with adhesive or preferably extrusion lamination is possible, a molten polymer film being introduced between the film and the plastic fabric.
  • a polymer film can have one or more layers. When a multi-layer film is inserted, it is produced by coextrusion, as a result of which an optimal connection to the plastic fabric on the one hand and to the outer film on the other can be achieved.
  • the foils on the outside of the gusseted bag can be provided with a print even before lamination.
  • This imprint is then expediently arranged on the side which is laminated with the plastic fabric.
  • the print is then arranged on the inside in a protected manner.
  • the plastic fabric can also be coated with a molten plastic layer to form the plastic-fabric composite. Even with such a configuration, the plastic fabric can provide a high degree of stability, while the applied plastic layer creates a tight seal and forms a largely homogeneous printable outer surface. In the context of such an embodiment, however, there is the disadvantage that the plastic coating formed in this way can only be provided with an external print. If necessary, this can be provided with a protective varnish to achieve high abrasion resistance.
  • the protective lacquer can also be provided to produce a matt, dull surface.
  • a matt, blunt surface is preferred in order to avoid slipping when the filled side gusset bags are stacked.
  • a matt polymer material with a dull surface finish is preferably provided.
  • the outer edge of the material web is visible on the outer edge section.
  • the overlap area is therefore expediently formed such that the outer edge of the material web is arranged on the side of the overlap area which is adjacent to the closest folded edge. With such a configuration, the outer edge of the material web can be placed right up to the nearest folded edge.
  • the distance between the outer edge and the closest folded edge is preferably less than 80 mm.
  • the plastic fabric is expediently formed from strips or ribbons of an stretched film, a first group of ribbons and a second group of ribbons being produced at right angles or approximately at right angles. It is known to produce corresponding plastic fabrics on circular looms.
  • the width of the intersecting tapes is usually between 2 mm and 4 mm, in particular between 2.5 mm and 3.2 mm.
  • the plastic tapes stretched in their longitudinal direction are usually made of polyolefin, in particular polypropylene.
  • plastic fabric with a basis weight between 50 g / m 2 and 100 g / m 2 , for example with a basis weight of about 72 g / m 2 is suitable.
  • the plastic fabric is not heat-sealable due to its fabric structure.
  • the plastic fabric can optionally also be provided in sections or over the entire area with a heat-sealable coating or with glued-on heat-sealable foil sheets.
  • the gusseted bag according to the invention is particularly suitable for a large filling volume and a high weight. Against this background, it may be useful to provide the side gusset bag with a handle. Due to the lack of heat sealability of the plastic fabric on the inside, a carrying handle glued onto the outer surface of the gusseted bag is particularly suitable. As already explained, individual heat-sealable foil slips can also be placed on the inside, to which a carrying handle can then also be attached.
  • the gusseted bag is made entirely of polyolefin and particularly preferably made entirely of polypropylene (PP).
  • PP polypropylene
  • the film arranged on the outside of the gusseted bag can be formed, for example, from polypropylene, in particular a biaxially oriented polypropylene (BO-PP).
  • the layer thickness of such a film is preferably between 10 and 40 ⁇ m, particularly preferably between 15 and 30 ⁇ m.
  • a molten film is introduced between the outer film and the plastic fabric, this film having to have a sufficient thickness in order to produce a secure connection despite the somewhat irregular structure of the plastic fabric.
  • the film provided for the connection is preferably introduced with a basis weight between 25 g / m 2 and 40 g / m 2 .
  • the molten film can be extruded in one layer or coextruded in multiple layers.
  • a thin adhesive layer is expediently provided in the direction of the film lying on the outside of the side gusset bags.
  • the outer foil and the plastic fabric can be primed before lamination to increase the bond strength.
  • primer In the case of a single-layer extrusion in particular, it is advisable to apply primer to the film if it is printed. In this case, sufficient adhesion of the molten film to the print must be achieved.
  • a simple hose is first formed, which is closed on the circumference at the overlap area.
  • the tube is formed lying flat with two lateral fold lines, the tube subsequently being formed into the side fold tube so that the fold lines are each arranged on one of the fold edges of the side fold tube.
  • the finished gusseted bag is then diagonally opposite folded edges.
  • the formation of the tube from the material web, the circumferential closing of the material web in the overlap region and the formation of the gusseted tube are preferably carried out on a continuously running strand in successive process steps.
  • mass production is possible, with a speed of advance of the strand, for example, at least 70 m / min. preferably 100 m / min. (Meters per minute).
  • the length of the individual tube pieces separated from the gusseted tube is preferably between 700 mm and 1200 mm. Taking into account the speed of advance mentioned above, this results in a typical cycle rate of approximately 100 tube pieces and thus 100 gusseted bags per minute.
  • the separated hose pieces are initially open at both ends. Expediently, however, the tube pieces are closed at one of their ends immediately after the separation. So one of the open ends of the tube pieces can be rolled up and fixed in the rolled up state.
  • a first strip of the tube piece is usually folded by 180 ° and then a second strip with the first strip arranged thereon likewise likewise folded by 180 °.
  • the strips can have a width of approximately 20 mm, for example.
  • the fixation can be done for example by an adhesive strip, by means of adhesive or by hot air. If the end closed in this way forms the bottom of the gusseted bag, it is subsequently filled into a filling system at its upper end and then closed at its upper end. As with conventional paper bags, they can be closed, for example, by sewing or gluing.
  • the end of the tube pieces which is closed immediately during manufacture is provided as the upper edge of the gusseted bags.
  • the rolled end can be fixed with a removable adhesive strip.
  • the removable adhesive strip makes it particularly easy to open the filled gusseted bag.
  • the bag prepared in this way is then filled from the lower end and closed there.
  • the flat-lying hose pieces are usually rolled in on the side on which the overlap area is also provided.
  • the front wall with the clearly visible overlap area and the rolled end is usually arranged on the back of the bag.
  • a removable adhesive strip is then not immediately recognizable to the user.
  • the overlap area is arranged far outside in the area of one of the side gussets and so the visual appearance is less disturbed.
  • the corresponding front wall of the gusseted bag can therefore also be provided as the front side, in which case a removable adhesive strip on a rolled end is likewise arranged on the front side and is immediately visible.
  • the basis weight of the composite plastic fabric is preferably between 100 g / m 2 and 150 g / m 2 .
  • the Fig. 1 shows a gusseted tube 1 made of a plastic fabric composite 2, from which individual flat gusseted bags can be separated.
  • the side gusset tube 1 or the individual side gusset bags have opposite front walls 3a, 3b between side gussets 4a, 4b and fold edges 5 between the front walls 3a, 3b and the side gussets 4a, 4b.
  • the plastic fabric composite 2 is formed by extrusion lamination of a film 6 forming the outer surface of the gusseted tube 1 and a plastic fabric 7 lying inside the gusseted tube 1.
  • the film 6 and the plastic fabric 7 are connected by an intermediate layer 8, which is introduced as a molten film during extrusion lamination.
  • the plastic fabric 7 has according to the Fig. 1 crossing strips of film, which usually have a width of about 3 mm.
  • the weight per unit area of the plastic fabric 7 is 72 g / m 2 , the strips being made of polypropylene and each being axially stretched.
  • the strips are usually arranged such that a first group of strips runs in the longitudinal direction of the gusseted tube 1 and a crossing second group of strips runs in the transverse direction.
  • the structure of the crossed, stretched strips ensures particularly high stability of the gusseted bag. In particular, local damage such as punctures, cracks or the like cannot spread through the plastic fabric composite 2.
  • the film 6 arranged on the outside of the gusseted tube 1 can be formed, for example, from a biaxially oriented polypropylene (BO-PP) with a thickness of typically 18 ⁇ m. A comparatively dull material is preferred in order to prevent slipping when stacked side gusset bags 15 are stacked.
  • the intermediate layer 8, which is introduced in a molten state during lamination, is also made of polypropylene, so that the entire plastic fabric composite 2 is made of polypropylene and can thus be easily recycled.
  • the basis weight of the intermediate layer 8 is, for example, 30 g / m 2 .
  • the Fig. 1 it can also be seen that the film 6 is printed on its surface adjoining the intermediate layer 8.
  • the advantage here is that this print 9 is optimally protected against external influences by the arrangement on an inner layer transition.
  • the plastic fabric 7 has poor sealability, which is why an overlap area 10 is provided for closing the gusseted tube 1, on which edge sections of the plastic fabric composite 2 supplied as a material web overlap.
  • the first side of the material web on which the plastic fabric 7 is arranged which is assigned to the outer edge section, is connected to the second side, that is to say the film 6, which is assigned to the inner edge section, in order to close the gusseted tube 1 on the circumference.
  • Suitable adhesives 11 are not only conventional adhesives such as solvent-based adhesives and hot-melt adhesives, but also molten plastics. Molten polypropylene is particularly preferably applied in the context of the present invention.
  • the overlap region 10 is at least partially off-center on a side fold 4a, 4b or on one of the front walls 3a, 3b over one of the side folds 4a, 4b. It is therefore not readily possible to first form the gusseted tube 1 and then the connection by the adhesive 11 in the overlap area 10.
  • a simple, flat-lying hose 12 is formed from the plastic fabric composite 2 supplied as a material web and is closed on the circumference at the overlap region 10 by the adhesive 11.
  • the closed tube 12 is subsequently fed to a folding device 13 with which the flat gusseted tube 1 described above is formed.
  • the hose 12 is advantageously fed to the folding device 13 in such a way that two diagonally opposite folding edges 5 of the gusseted hose are formed from two lateral fold lines 14 of the hose 12.
  • the overlap region 10 can also easily be in the region of one of the side gussets 4a, 4b, d. H. are formed on one of the side folds 4a, 4b or on one of the front walls 3a, 3b at least partially above one of the side folds 4a, 4b.
  • the formation of the tube 12 on the circumferential side of the plastic fabric composite 2 fed as a material web, the closing of the material web in the overlap region 10 and the formation of the gusseted tube 1 take place continuously on a continuous strand, which is preferably at a forward speed of at least 70 m / min. (Meters per minute) is moved.
  • this can be rolled up in a manner known per se and fixed in the rolled-up state.
  • Such a closed end can form both the lower edge and the upper edge of the gusseted bag.
  • the Fig. 3 shows a possible embodiment of a filled side gusset bag 15, in which one end is rolled onto itself by double folding and is fixed in the rolled-up state by an adhesive strip 16.
  • the adhesive strip 16 is removable, so that the filled gusseted bag 15 can be opened easily.
  • the outer edge 17 of the plastic fabric composite 2 visible at the overlap area 10 is arranged at a short distance from the adjacent folded edge 5.
  • the overlap area 10 can therefore also be arranged on the front side of the filled gusset bag 15, on which the adhesive strip 16 is also provided.
  • the optical appearance of the printed front side of the filled gusset bag 15 is not significantly impaired by the overlap area 10 arranged on the edge.
  • Fig. 3 Filled gusseted bag 15 shown was filled from its underside and is closed there, for example, by a seam 18, as is customary for sacks made of paper or fabric.

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

Claims (10)

  1. Procédé de fabrication d'un sac à plis latéraux,
    dans lequel une bande de matériau est acheminée,
    dans lequel la bande de matériau est formée en un tuyau (12) de manière à ce que les sections périphériques de la bande de matériau se chevauchent et à ce qu'une première face de la bande de matériau forme la surface interne et une seconde face de la bande de matériau la surface externe du tuyau (12),
    dans lequel, dans la zone de chevauchement (10), la première face associée à la section périphérique se trouvant à l'extérieur de la bande de matériau est raccordée par une colle (11) à la seconde face associée à la section périphérique se trouvant à l'intérieur de la bande de matériau afin de fermer le tuyau (12) au niveau de sa circonférence,
    dans lequel le tuyau fermé (12) est ensuite acheminé à un dispositif de pliage (13) grâce auquel un tuyau plat à plis latéraux (1) présentant des parois frontales opposées (3a, 3b), des plis latéraux insérés entre celles-ci (4a, 4b) et des arêtes de pliage (5) est formé entre les parois frontales (3a, 3b) et les plis latéraux de manière à ce que le tuyau à plis latéraux (1) présente respectivement au niveau des plis latéraux (4a, 4b) quatre épaisseurs et deux épaisseurs de bande de matériau entre les plis latéraux,
    dans lequel le tuyau à plis latéraux (1) est réalisé de manière à ce que la zone de chevauchement (10) soit disposée du moins partiellement dans une section formée de quatre épaisseurs de bande de matériau du tuyau à plis latéraux (1) et
    dans lequel des morceaux de tuyau sont séparés du tuyau à plis latéraux (1) pour former des sacs à plis latéraux individuels,
    caractérisé en ce que, pour former le sac à plis latéraux à partir d'un composite de tissu synthétique (2), la bande de matériau acheminée est constituée d'un tissu synthétique (7) et d'au moins une couche fermée de matière plastique et en ce que le tuyau fermé (12) est réalisé à plat avec deux lignes de pliage latérales (14), le tuyau (12) étant ensuite transformé en tuyau à plis latéraux (1) de manière à ce que les lignes de pliage (14) soient respectivement disposées au niveau d'une des arêtes de pliage (5) du tuyau à plis latéraux (1).
  2. Procédé selon la revendication 1, caractérisé en ce que la bande de matériau est constituée par plaquage du tissu synthétique (7) avec un film (6), le tissu synthétique (7) formant la surface de la première face et le film (6) la surface de la seconde face de la bande de matériau.
  3. Procédé selon la revendication 2, caractérisé en ce que le film (6) et le tissu synthétique (7) sont assemblés par un plaquage par coextrusion.
  4. Procédé selon une des revendications 1 à 3, caractérisé en ce qu'une extrémité ouverte des morceaux de tuyau est enroulée et fixée à l'état enroulé.
  5. Procédé selon la revendication 4, caractérisé en ce que l'extrémité enroulée est fixée par un ruban adhésif repositionnable (16).
  6. Procédé selon une des revendications 1 à 5, caractérisé en ce que la zone de chevauchement (10) est disposée au niveau d'une des parois frontales (3a, 3b) de manière à ce qu'un bord extérieur (17) associé à la section périphérique extérieure de la bande de matériau se trouve à une distance de moins de 80 mm de l'arête de pliage la plus proche (5).
  7. Procédé selon une des revendications 1 à 5, caractérisé en ce que la zone de chevauchement (10) est disposée au niveau d'un des plis latéraux (4a, 4b).
  8. Procédé selon une des revendications 1 à 7, caractérisé en ce que la formation du tuyau (12) dans la bande de matériau, la fermeture de la bande de matériau dans la zone de chevauchement (10) et la formation du tuyau à plis latéraux (1) ont lieu sur une chaîne circulant en continu.
  9. Procédé selon la revendication 8, caractérisé en ce qu'une vitesse d'avancement de la chaîne s'élève à au moins 70 m/min.
  10. Procédé selon une des revendications 1 à 9, caractérisé en ce que des morceaux de tuyau ayant respectivement une longueur comprise entre 700 mm et 1200 mm sont découpés dans le tuyau à plis latéraux (1).
EP13703630.7A 2012-03-07 2013-02-13 Sachet à soufflets latéraux constitué d'un tissu composite en matière synthétique et son procédé de fabrication Not-in-force EP2822867B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012101932A DE102012101932A1 (de) 2012-03-07 2012-03-07 Seitenfaltenbeutel aus einem Kunststoffgewebeverbund sowie Verfahren zu seiner Herstellung
PCT/EP2013/052899 WO2013131727A1 (fr) 2012-03-07 2013-02-13 Sachet à soufflets latéraux constitué d'un tissu composite en matière synthétique et son procédé de fabrication

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EP2822867A1 EP2822867A1 (fr) 2015-01-14
EP2822867B1 EP2822867B1 (fr) 2016-04-13
EP2822867B2 true EP2822867B2 (fr) 2020-01-22

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US (1) US9758279B2 (fr)
EP (1) EP2822867B2 (fr)
CA (1) CA2866195C (fr)
DE (1) DE102012101932A1 (fr)
ES (1) ES2574658T5 (fr)
MX (1) MX342728B (fr)
WO (1) WO2013131727A1 (fr)

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WO2013131727A1 (fr) 2013-09-12
CA2866195C (fr) 2019-02-12
ES2574658T5 (es) 2020-07-15
MX342728B (es) 2016-10-11
MX2014010649A (es) 2015-04-13
EP2822867A1 (fr) 2015-01-14
US9758279B2 (en) 2017-09-12
DE102012101932A1 (de) 2013-09-12
ES2574658T3 (es) 2016-06-21
EP2822867B1 (fr) 2016-04-13
CA2866195A1 (fr) 2013-09-12
US20150030265A1 (en) 2015-01-29

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