EP2110336A1 - Sac d'emballage - Google Patents

Sac d'emballage Download PDF

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Publication number
EP2110336A1
EP2110336A1 EP08405107A EP08405107A EP2110336A1 EP 2110336 A1 EP2110336 A1 EP 2110336A1 EP 08405107 A EP08405107 A EP 08405107A EP 08405107 A EP08405107 A EP 08405107A EP 2110336 A1 EP2110336 A1 EP 2110336A1
Authority
EP
European Patent Office
Prior art keywords
bag
bag according
reinforcing strip
packaging film
bottom fold
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.)
Withdrawn
Application number
EP08405107A
Other languages
German (de)
English (en)
Inventor
Rico Ménard
Jean Claude Jammet
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.)
3A Composites International AG
Original Assignee
3A Technology and Management AG
Alcan Technology and Management Ltd
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 3A Technology and Management AG, Alcan Technology and Management Ltd filed Critical 3A Technology and Management AG
Priority to EP08405107A priority Critical patent/EP2110336A1/fr
Publication of EP2110336A1 publication Critical patent/EP2110336A1/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • B65D75/008—Standing pouches, i.e. "Standbeutel"

Definitions

  • the invention relates to a bag made of a flexible packaging film with at least one sealing seam arranged along a bag edge.
  • a classic bag system is the stand-up pouch or the "Doy-Pack" bag form.
  • material constructions with two to four main layers are used.
  • Stand-up pouches are usually made from 3- or 4-ply laminates, with each layer causing certain properties of the laminate.
  • a layer of polyethylene terephthalate (PET) or oriented polypropylene (oPP) is chosen on the outside because PET and oPP films can easily be printed on the inside as reverse printing, offer beautiful gloss surfaces, give the necessary rigidity to the overall composite and for the production the bag by thermal welding give the laminates the necessary thermal stability.
  • Oriented polyamide (OPA) is often used as the second layer from the outside to give the laminate the necessary toughness and to provide the puncture resistance, e.g. As against mechanical damage caused by sharp objects, and to improve the barrier properties.
  • Gases or flavors can be vacuum-coated before the lamination of the individual films of one of the films with metals, metal oxides or ceramic with SiO x .
  • metals, metal oxides or ceramic with SiO x Alternatively, aluminum foils in typical thicknesses of 6 to 15 microns are used.
  • the innermost layer of the laminate is usually polyethylene (PE) or, in particular for sterilizable applications, also polypropylene (PP) is used, these so-called sealing layers can also be made in multiple layers by blown or Castextrusion. By a multilayer structure of the sealing layer also an "easy opening" behavior can be achieved.
  • TP triple point
  • the invention has for its object to improve in a bag of the type mentioned, the tensile strength of the packaging film in areas with increased risk of breakage. Another object of the invention is the production of bags with improved protection against bursting with minimal material usage. A still further object is to improve the tear strength of the packaging film, especially the bottom fold of stand-up pouches.
  • the packaging film in this area has a reinforcing strip of reinforcing film glued or sealed onto the packaging film, wherein one part of the reinforcing strip lies within the sealed seam.
  • plastic films used for pouches in the prior art can be used as a packaging film as single-layer films or as multilayer laminates, with and without a barrier layer.
  • the packaging film may have barrier properties against the passage of e.g. Liquids, gases, vapors, water vapor, flavors or odors.
  • EVOH ethylene-vinyl alcohol polymers
  • PVDC polyvinylidene chloride
  • the barrier layer against moisture, oxygen and other gases or flavors is arranged as a film or film between the outer layer and the sealing layer, a vacuum coating is carried out on the inside of the outer or inner layer.
  • the individual plastic films and optionally an aluminum foil of the laminate are interconnected by laminating adhesive.
  • Lacquer lamination can be carried out with aqueous, solvent-based or solvent-free laminating agents.
  • Suitable laminating adhesives can contain solvents or solvent-free or hydrous. Examples of laminating adhesives are solvent-borne, solvent-free or aqueous acrylate adhesives or polyurethane adhesive systems. Preferably, laminating adhesives based on polyurethane are used.
  • the laminate On the outside, based on the later produced from the laminate bag, the laminate may be provided with an optionally over-painted print pattern.
  • the printing pattern can also be designed as a counterpressure on the backside of the plastic film forming the outer side of the bag.
  • the individual plastic films of the packaging film can be transparent, translucent or opaque. They can be clear or partially or completely colored.
  • a stand bag with a front and a back and one folded around a folding axis and sealed between the front and back in lateral longitudinal sealing bottom fold of the reinforcing strip covers the applicable as an area with increased risk of break transition of the folding axis of the bottom fold in the lateral longitudinal sealing seams the folding axis and is folded sealed in the longitudinal sealing seams.
  • the reinforcing strip preferably extends between the lateral longitudinal sealing seams over the entire length of the bottom fold. But it can also be provided in the region of each of the lateral longitudinal sealing seams depending on a reinforcing strip.
  • the reinforcing strips are preferably arranged symmetrically with respect to the folding axis and on the side of the packaging film forming the bottom fold, which faces the inside of the bag.
  • the packaging film is a multilayer, in particular a two-ply, preferably a PET / PP, PET / PE or oPP / PE laminate.
  • the reinforcing strip may be a single-layer plastic film of e.g. PE or PP, polyolefin-based derivatives or copolymers or mixtures of the aforementioned materials.
  • the reinforcing strip is preferably a multilayer, in particular a three-layer, preferably a PP / PET / PP or PE / PET / PE laminate.
  • bags are reinforced locally at this weakest point by inserting a further film layer. It has proved to be particularly advantageous to thermally weld the reinforcing strips firmly to the bottom fold prior to the production of the bags. It would also be conceivable to previously bond the reinforcing strips to the bottom fold, i. the reinforcing strip can be laminated to the bottom fold, for example by means of a reactive adhesive system.
  • An in Fig. 1 illustrated doypack pouch 10 with a vertical pouch axis z has a front 12, a back 14 and sealed between front 12 and back 14 in a known manner bottom fold 16 in the form of along a horizontal folding axis f by 180 ° on itself folded strip of material.
  • the upstanding from a footprint 18 of the bag 10 front and rear sides 12, 14 are connected by lateral longitudinal sealing seams 20, 21 with each other.
  • the front and rear sides 12, 14 are connected to one another via a transverse sealing seam 22.
  • the bottom fold 16 between the front and back 12, 14 in the lateral longitudinal sealing seams 20, 21 welded , Between the lateral longitudinal sealing seams 20, 21 extends from the folding axis f of the bottom fold 16 to the bottom surface 18, a bottom seam 23.
  • the bottom seam 23 connects the front and the rear wall 12, 14 with the bottom fold 16. Here terminates one of the boundary lines of the bottom seam 23rd on the standing surface 18.
  • the upper boundary line 24 extends arcuately from the side longitudinal sealing seams 20, 21 starting from the height of the fold line f, with a shortest distance from the standing surface 18 in the middle between the longitudinal sealing seams 20, 21.
  • the curved course of the upper boundary line 24 is selected such that the bottom fold 16 of the unfilled bag folded into the interior of the bag is filled during filling of the bag Bag 10 unfolds and thus forms the bottom 25 of the bag 10 ( Fig. 2 ).
  • the bottom fold 16 is provided on the side facing the bag interior with a respect to the folding axis f symmetrical reinforcing strip 26.
  • the reinforcing strip 26 extends over the entire width of the bag 10 and is welded between bottom fold 16 and front and back 12, 14 in the lateral longitudinal sealing seams 20, 21 of the bag 10. Between the lateral longitudinal sealing seams 20, 21 is the reinforcing strip 26, with the exception of a narrow, immediately following the longitudinal sealing seams 20, 21 adjacent edge zone, substantially above the upper boundary line 24 of the bottom seam 23 and is no longer with the front and back 12, 14, but only connected to the bottom fold 16 of the bag 10.
  • the vulnerability of the bag 10 in terms of bursting after a fall is in the vicinity of the so-called triple point TP.
  • This is the point on the lateral longitudinal sealing seams 20, 21 where the welded structure of the sealing seam of 4-ply (folded bottom fold 16, front 12 and back 14) changes to two-ply (only front 12 and back 14).
  • Either one of the longitudinal sealing seams 20, 21 bursts just above the triple point TP, or in one of the front or back sides 12, 14, starting from the triple point TP, a crack or a crack runs, likewise starting from the triple point TP , in the bottom fold 16 along the folding axis f.
  • the 7-ply PP blown film has the structure A / B / A / B / A / B / A with a layer thickness distribution of 20/12/12/12/12/20 (all figures in ⁇ m), the layers A being Moplen Basell EP310D and Basell Adflex Q100F layers B.
  • the 60 ⁇ m thick PP film used as the reinforcement strip consists of a blend of Basell 70% Moplen EP310D and Basell's 30% Adflex Q100F (in% by weight).
  • the two 60 ⁇ m thick PP blown films of the laminate, with which the bottom fold was reinforced, consist of a blend of 80% Moplen EP310D from Basell and 20% Adflex Q100F from Basell (data in% by weight).
  • test results show that only by a local reinforcement of the bottom fold of the bag both before and after a sterilization a significantly improved robustness of the bag against sudden stress could be achieved.
  • the bags produced according to the invention with local reinforcement of the bottom fold now permit a reduction in the thicknesses of the packaging films used for the production to such an extent that the drop heights h50 to be achieved for the corresponding applications are just reached. This saves material, which also reduces the amount of waste and complies with the desire for better sustainability of the packaging.
  • the inventive concept of local, targeted reinforcement at particularly vulnerable points of a package can be applied to all types of flexible bag packaging and is not limited to stand-up pouches.
  • the provision of local reinforcements according to the invention at particularly endangered locations of flexible packaging makes it possible to reduce the number of layers of the substantially packaging-forming laminate, which leads to cost savings.
EP08405107A 2008-04-16 2008-04-16 Sac d'emballage Withdrawn EP2110336A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08405107A EP2110336A1 (fr) 2008-04-16 2008-04-16 Sac d'emballage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08405107A EP2110336A1 (fr) 2008-04-16 2008-04-16 Sac d'emballage

Publications (1)

Publication Number Publication Date
EP2110336A1 true EP2110336A1 (fr) 2009-10-21

Family

ID=39515051

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08405107A Withdrawn EP2110336A1 (fr) 2008-04-16 2008-04-16 Sac d'emballage

Country Status (1)

Country Link
EP (1) EP2110336A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012016864A1 (de) 2012-08-25 2014-02-27 Vereinigte Papierwarenfabriken Gmbh Seitenfaltenbeutel
CN108569434A (zh) * 2017-03-14 2018-09-25 张乾彬 食品纸包装袋制程
CN114801385A (zh) * 2022-03-29 2022-07-29 珠海市德燊环保包装有限公司 一种复合薄膜及其制备方法和应用

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2526975A1 (de) * 1975-06-16 1976-12-23 Jentsch Hans G Kunststoff-standbeutel
US4837849A (en) * 1988-03-21 1989-06-06 The Dow Chemical Company Stand-up plastic bag and method of making same
WO2002074653A1 (fr) * 2001-03-20 2002-09-26 Eco Lean Research & Development A/S Contenant repliable

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2526975A1 (de) * 1975-06-16 1976-12-23 Jentsch Hans G Kunststoff-standbeutel
US4837849A (en) * 1988-03-21 1989-06-06 The Dow Chemical Company Stand-up plastic bag and method of making same
WO2002074653A1 (fr) * 2001-03-20 2002-09-26 Eco Lean Research & Development A/S Contenant repliable

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012016864A1 (de) 2012-08-25 2014-02-27 Vereinigte Papierwarenfabriken Gmbh Seitenfaltenbeutel
DE102012016864B4 (de) * 2012-08-25 2016-06-16 Vereinigte Papierwarenfabriken Gmbh Seitenfaltenbeutel
CN108569434A (zh) * 2017-03-14 2018-09-25 张乾彬 食品纸包装袋制程
CN114801385A (zh) * 2022-03-29 2022-07-29 珠海市德燊环保包装有限公司 一种复合薄膜及其制备方法和应用
CN114801385B (zh) * 2022-03-29 2024-01-30 珠海市德燊环保包装有限公司 一种复合薄膜及其制备方法和应用

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