WO2012159807A1 - Procédé de fabrication d'un film composite pour sachet tubulaire - Google Patents

Procédé de fabrication d'un film composite pour sachet tubulaire Download PDF

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Publication number
WO2012159807A1
WO2012159807A1 PCT/EP2012/055770 EP2012055770W WO2012159807A1 WO 2012159807 A1 WO2012159807 A1 WO 2012159807A1 EP 2012055770 W EP2012055770 W EP 2012055770W WO 2012159807 A1 WO2012159807 A1 WO 2012159807A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
composite film
tubular bag
layer structure
produced
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.)
Ceased
Application number
PCT/EP2012/055770
Other languages
German (de)
English (en)
Inventor
Joerg P. Weltert
Dirk Ekenhorst
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2012159807A1 publication Critical patent/WO2012159807A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/06—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions for securing layers together; for attaching the product to another member, e.g. to a support, or to another product, e.g. groove/tongue, interlocking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/10—Removing layers, or parts of layers, mechanically or chemically
    • 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
    • B65D75/5861—Spouts
    • B65D75/5872—Non-integral spouts
    • B65D75/5877—Non-integral spouts connected to a planar surface of the package wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/36—Bending and joining, e.g. for making hollow articles
    • B29C53/38—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges
    • B29C53/48—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of indefinite length, i.e. bending a strip progressively
    • B29C53/50—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of indefinite length, i.e. bending a strip progressively using internal forming surfaces, e.g. mandrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/04—Punching, slitting or perforating
    • B32B2038/042—Punching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7244—Oxygen barrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2311/00—Metals, their alloys or their compounds
    • B32B2311/24—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
    • B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state

Definitions

  • the invention relates to a method for producing a composite film for a tubular bag according to the preamble of claim 1.
  • a method for producing a composite film for a tubular bag according to the preamble of claim 1. Such a method in which a composite film in the range of at least one
  • a packaging container which consists of a multilayered material which comprises an inner and outer coated cardboard.
  • the outer coating of the cardboard is recessed in the region of an opening device.
  • Soft bag pack in the form of a tubular bag suitable is known from WO 2007/149231 A2.
  • Material layer is covered in the form of a packaging material strip. From the other side of the formed as a laminate film composite film is the
  • Opening device brought into overlap with the punched hole and connected via an annular area with the packaging material strip.
  • the opening device has a cutting device in the form of cutting teeth, which perforates or separates the additional material layer for opening the packaging container, in order, for example, to pour out a
  • Such packaging containers in the form of tubular bags are produced on so-called tubular bag machines.
  • the holes for the opening devices are separated or punched out of the composite film stored as an endless packaging material web at a separate entry station. Subsequently, from the later inner side of the packaging container to the packaging material web, the material sections which form the later barrier layers are sealed.
  • the method using the last-mentioned composite film is relatively complicated due to the required punching of the packaging material web and subsequent sealing of the barrier layers, since an additional punching device and a sealing device are required. In particular, it can do it
  • the invention has the object, a method for producing a composite film for a tubular bag according to the preamble of claim 1 such that this in economic production of the composite film a maximum
  • the invention is based on the idea to form the composite film by the use of two, interconnected layer structures, of which one layer structure contains the recesses for opening devices, wherein the layers of the composite film are formed as flexible layers.
  • the recesses can be produced with high precision and relatively low cost by a punching or laser process.
  • the at least one further layer has at least one first carrier layer.
  • FIG. 1 is a simplified side view of a filled with a filling tube bag with an opening device
  • FIG. 5 is a simplified illustration to explain the manufacturing process of a composite film for the production of tubular bags according to FIG.
  • Fig. 6 shows a packaging machine for manufacturing with a filling
  • FIG. 11 is a simplified illustration for explaining the manufacturing method of a first alternative composite film
  • Fig. 14 is a simplified illustration for explaining the manufacturing method of a second alternative composite film.
  • Fig. 1 a designed as a tubular bag 1 packaging container is shown in simplified.
  • the tubular bag 1 has an upper transverse seam 2, a lower transverse seam 3 and at least one longitudinal seam 4. It can also be provided that in the bottom area or in the head area of
  • Tubular bag 1 of this is formed with a folded bottom or a folded head closure, for example, to allow a stability of the tubular bag 1 or a specific visual appearance.
  • Opening device 10 is arranged. As can best be seen from FIG. 2, the opening device 10, which preferably consists of plastic and is produced by injection molding, has a main body 1 1 which is connected to a removable cover closure 12. The screwable
  • Cover closure 12 cooperates with cutting teeth 13, which come in rotation with the lid closure 12 in Wrkharm with the outer wall 5 of the tubular bag 1 to cut through this or form a passage and thus a removal of located in the tubular bag 1 product 7, z.
  • a liquid product 7 such as milk, fruit juices or the like to allow.
  • the base body 1 1 has a circumferential connecting flange 14, which is used for fastening the
  • Opening device 10 on the tubular bag 1 is used.
  • the material of the tubular bag 1 consists of a flexible film consisting of composite film, in particular a laminate composite film 15, 15a, and has, according to FIGS. 3 and 4 by way of example and not limitation, a
  • LDPE low density polyethylene
  • MDPE medium density polyethylene
  • the first layer structure 19 consisting of the LDPE sealing layer 16, the aluminum layer 17 and the MDPE layer 18 or the adhesive layer 18a, which acts as a barrier layer or barrier layer composite, is provided by means of a layer in the Fig. 5 simplified illustrated manufacturing device 20, which includes a co-extrusion device 21, connected to a second layer structure 22.
  • the second layer structure 22 comprises a primer layer 23, a printing layer 24 and a carrier layer 25.
  • the second layer structure 22 is connected to the first film layer structure 19 by means of the manufacturing device 20 shown in FIG. 5 to the laminate composite film 15 or 15a and to a packaging material roll 28 wound.
  • the second layer structure 22 in each case has a recess 30, 30a in the regions in which the opening devices 10 are arranged during production of the tubular bag 1.
  • the recesses 30, 30a in this case already in the manufacturing process of the second
  • Laser beam cutting device in the second layer structure 22 generated or formed.
  • the recesses 30 are formed at least in the region of the carrier layer 25, since the
  • Carrier layer 25 made of OPP (oriented polypropylene), PET or a mechanically similar resilient material or such
  • the packaging material roll 28 with the rolled up laminate composite film 15, 15a already has the recesses 30 for the opening devices 10, it being essential that the arrangement of the recesses 30 on the laminate composite film 15, 15a preferably at certain, uniform intervals corresponding to Formats of the laminate composite film 15, 15a
  • the recess 30 has a size which is smaller than the size or the
  • the connecting flange 14 is connected with its underside with the carrier layer 25, which forms the later outer wall 5 of the tubular bag 1.
  • the connection preferably takes place by means of a not shown Ultrasonic welding device or a heat-sealing device. This connects the connecting flange 14 of the opening device 10 with a particular radially circumferential connecting seam such that the connecting flange 14 is sealed to the carrier layer 25.
  • the opening device 10 or the base body 11 or the cutting edges 13 are not yet in operative connection with the first film layer structure 19. This takes place only when opening the tubular bag 1 for removal of the product. 7
  • the recess 30a has a size or a diameter which is greater than the size of the connection flange 14 of the opening device 10a.
  • the opening device 10a is applied with its connection flange 14a on the MDPE layer 18 or connected thereto, preferably by an ultrasonic welding device, not shown.
  • FIG. 6 shows in simplified form a packaging installation 32 for producing tubular bags 1 from a packaging material roll 28 and filling the tubular bags 1.
  • the packaging system 32 has transport rollers 33, 34, by means of which the packaging material roll 28 is unrolled. Further, a plurality of dancer rollers 36 having compensating means 37 can be seen, by means of which a balance between a cyclical advantage and a continuous preference of the material of the packaging material roll 28 in different areas of
  • Packaging machine 32 is enabled.
  • the laminate composite film 15 passes after rolling in the area of a machine housing 38 of
  • Packaging machine 32 wherein prevail within the machine housing 38, a sterile atmosphere or sterile conditions.
  • a sterilizing bath 39 is arranged, in which, for example, liquid hydrogen peroxide to sterilize the laminated laminate 15 is located. Subsequently, the laminate composite film 15 by means of a
  • Drying device 40 dried and a vertical
  • Tubular bag machine 42 supplied.
  • the tubular bag machine 42 has a forming shoulder 43 and a forming and filling tube 44, which is coupled to a storage, not shown, for the product 7 to be filled.
  • the forming and filling tube 44 penetrates the Machine housing 38 in the region of an outlet 45. From the region of the outlet 45 prevail in the area of the packaging machine 32 unsterile conditions.
  • a longitudinal seam sealing device 46 as well as two vacuum-supported, cyclically operating withdrawal belts 47, 48 can be seen.
  • an application device 50 for attaching the opening devices 10 to the outer wall 5 of the tubular bags 1 can be seen.
  • the application device 50 which is not shown in detail, essentially comprises the already mentioned ultrasonic welding device and is preferably provided with a
  • the application device 50 is still arranged in the region of the forming and filling tube 44, so that when attaching the opening means 10 on the outer wall 5 of the subsequent tubular bag 1, the forming and filling tube 44 forms a counter-holder for the opening device 10 to to allow the required contact pressure of the connecting flange 14 on the outer wall 5. Furthermore, it is essential that the application device 50 is located in the non-sterile area. This allows a direct access (in case of possible) malfunctions of the application device 50, without affecting the sterility of the upstream region of the packaging system 32. Furthermore, there is no need to sterilize the opening devices 10.
  • transverse sealing device 51 is arranged below the forming and filling tube 44, the two mutually movable transverse sealing jaws 52 and 53, and (not shown) separating knife for separating one each
  • FIGS. 7 to 11 show the manufacturing process of a laminate composite film 15b, which may alternatively be used instead of the laminate composite films 15, 15a.
  • the carrier layer 25a made of PET or OPP on its rear side with the one
  • the recesses 30, 30a are formed in the second layer structure 22a.
  • the second layer structure 22a produced in this way is then connected to a prefabricated intermediate layer 27 in accordance with FIG. This is done by extrusion lamination.
  • the intermediate layer 27 comprises, for example, polyester, polyamide, polypropylene with or without barrier coatings, mono- or
  • Multi-layer films which are produced by blow molding or casting or an aluminum foil with a thickness between 5 ⁇ and 15 ⁇ .
  • a last step according to FIG. 11 is in another
  • the backing layer 25a comprising PET or OPP is printed on its rear side with the printing layer 24a having a printed image.
  • the carrier layer 25a is formed on the side facing away from the printing layer 24a by an adhesive or extrusion lamination process with a prefabricated, blown, and therefore relatively high strength, layer 29 formed as a monolayer or multilayer is connected.
  • the prefabrication also includes the formation of the recesses 30, 30a.
  • the layer 29 can have, among other things, the barrier function required for product protection.
  • a third operation shown in FIG.
  • the printing layer 24a is provided with the sealing layer 16b.
  • This is preferably done by means of a cast-extrusion coating.
  • slot dies are used to produce the sealing layer 16b.
  • the polymer melt strikes cooling rollers and the carrier material (carrier layer 25a and pressure layer 24a) shortly after the nozzle exit, which immediately freezes the molecular chain structure and keeps it short. This gives a very good cuttability, which is the opening of the tubular bag 1 by the
  • Opening device 10, 10 a facilitates.
  • the carrier material carrier layer 25a and printed layer 24a
  • the layer 29 by means of an adhesive lamination method.

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

Abstract

L'invention concerne un procédé de fabrication d'un film composite (15c) pour sachet tubulaire (1), le film composite (15c) étant constitué de plusieurs couches (16b, 24a, 25a, 29) reliées ensemble, au moins une des couches (16b, 24a, 25a, 29) étant conçue comme une couche barrière (16b, 29) et au moins une autre couche (29) comprenant un évidement (30 ; 30a). Selon l'invention, le film composite (15c) est fabriqué par assemblage d'une première structure stratifiée (19) à une seconde structure stratifiée (22), la seconde structure stratifiée (22) comprend au moins une autre couche (29) et l'évidement (30 ; 30a) dans la ou les autres couches (29) est pratiqué dans la seconde structure stratifiée (22) avant l'assemblage à la seconde structure stratifiée (22). Une couche (29) pouvant être soumise à une forte contrainte mécanique et fabriquée au cours d'un procédé de soufflage est utilisée pour la seconde structure stratifiée de film (22).
PCT/EP2012/055770 2011-05-26 2012-03-30 Procédé de fabrication d'un film composite pour sachet tubulaire Ceased WO2012159807A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110076538 DE102011076538A1 (de) 2011-05-26 2011-05-26 Verfahren zum Herstellen einer Verbundfolie für einen Schlauchbeutel
DE102011076538.7 2011-05-26

Publications (1)

Publication Number Publication Date
WO2012159807A1 true WO2012159807A1 (fr) 2012-11-29

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ID=45937347

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/055770 Ceased WO2012159807A1 (fr) 2011-05-26 2012-03-30 Procédé de fabrication d'un film composite pour sachet tubulaire

Country Status (2)

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DE (1) DE102011076538A1 (fr)
WO (1) WO2012159807A1 (fr)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5482176A (en) 1994-03-16 1996-01-09 The West Company, Incorporated Membrane piercing closure and spout assembly
US20030128899A1 (en) 2002-01-10 2003-07-10 Dennis John L. Pouch with frangible piercing point
US20050079322A1 (en) * 2003-10-14 2005-04-14 Knoerzer Anthony Robert Flexible film packaging having removable strip
WO2007149231A2 (fr) 2006-06-21 2007-12-27 Bosch Pouch Systems Ag Procédé pour fixer un bec verseur à une poche de film flexible
US20080014391A1 (en) * 2006-07-12 2008-01-17 Coutts David A Packaging roll stock with windows
AU2008201618A1 (en) * 2007-04-11 2008-10-30 Amcor Limited Production of flexible films
US20090098257A1 (en) * 2007-10-11 2009-04-16 Flaherty Robert C Self-venting microwavable packaging film; package using the film; and, methods
EP2133196A1 (fr) * 2008-06-13 2009-12-16 Drukkerij Zwart B.V. Matériau de conditionnement de protection avec fenêtre discontinue dans une surface pleine en papier
EP2374610A1 (fr) * 2010-04-09 2011-10-12 Dukka B.V. Procédé pour la fabrication d'un conditionnement de boissons stratifié
WO2011147908A1 (fr) * 2010-05-27 2011-12-01 Robert Bosch Gmbh Procédé pour réaliser un film composite destiné à un sachet tubulaire et sachet tubulaire correspondant

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5482176A (en) 1994-03-16 1996-01-09 The West Company, Incorporated Membrane piercing closure and spout assembly
US20030128899A1 (en) 2002-01-10 2003-07-10 Dennis John L. Pouch with frangible piercing point
US20050079322A1 (en) * 2003-10-14 2005-04-14 Knoerzer Anthony Robert Flexible film packaging having removable strip
WO2007149231A2 (fr) 2006-06-21 2007-12-27 Bosch Pouch Systems Ag Procédé pour fixer un bec verseur à une poche de film flexible
US20080014391A1 (en) * 2006-07-12 2008-01-17 Coutts David A Packaging roll stock with windows
AU2008201618A1 (en) * 2007-04-11 2008-10-30 Amcor Limited Production of flexible films
US20090098257A1 (en) * 2007-10-11 2009-04-16 Flaherty Robert C Self-venting microwavable packaging film; package using the film; and, methods
EP2133196A1 (fr) * 2008-06-13 2009-12-16 Drukkerij Zwart B.V. Matériau de conditionnement de protection avec fenêtre discontinue dans une surface pleine en papier
EP2374610A1 (fr) * 2010-04-09 2011-10-12 Dukka B.V. Procédé pour la fabrication d'un conditionnement de boissons stratifié
WO2011147908A1 (fr) * 2010-05-27 2011-12-01 Robert Bosch Gmbh Procédé pour réaliser un film composite destiné à un sachet tubulaire et sachet tubulaire correspondant

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