EP1138610B1 - Utilisation d'une feille d'emballage stratifiée - Google Patents

Utilisation d'une feille d'emballage stratifiée Download PDF

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Publication number
EP1138610B1
EP1138610B1 EP01400838A EP01400838A EP1138610B1 EP 1138610 B1 EP1138610 B1 EP 1138610B1 EP 01400838 A EP01400838 A EP 01400838A EP 01400838 A EP01400838 A EP 01400838A EP 1138610 B1 EP1138610 B1 EP 1138610B1
Authority
EP
European Patent Office
Prior art keywords
layer
utilisation
accordance
film
polyester
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.)
Revoked
Application number
EP01400838A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1138610A1 (fr
Inventor
Karsten Vidkjaer
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.)
Amcor Flexibles France SAS
Original Assignee
Danisco Flexible France
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8848747&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1138610(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Danisco Flexible France filed Critical Danisco Flexible France
Publication of EP1138610A1 publication Critical patent/EP1138610A1/fr
Application granted granted Critical
Publication of EP1138610B1 publication Critical patent/EP1138610B1/fr
Anticipated expiration legal-status Critical
Revoked 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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B65D77/2068—Means for reclosing the cover after its first opening
    • B65D77/2096—Adhesive means
    • 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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B65D77/2028—Means for opening the cover other than, or in addition to, a pull tab
    • B65D77/2032—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
    • B65D77/2044—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure

Definitions

  • the present invention relates to a use of a laminated packaging sheet.
  • Packagings comprising a packaging sheet allowing easy opening and reclosure are currently used for example for packaging food products.
  • the structure of such a sheet is described in particular in the French patent application FR-95 14117.
  • the laminated sheet used to allow the opening and reclosing of the package comprises two polymer films between which a layer of a permanent adhesive is interposed.
  • the films are intended to be oriented towards the inside of the package. It is adapted to be welded on the peripheral edge of a tray.
  • the other film called “support film”, is intended to form the outer face of the package.
  • the welding film consists of a single layer of the same polymer or a mixture of polymers.
  • FR-A-2,669,607 discloses a package comprising a packaging sheet comprising a permanent adhesive layer and a sounding film.
  • the sounding film comprises a layer of aluminum, heat-resistant lacquer or thin plastic to prevent the material contained in the package from coming into contact with the permanent adhesive layer.
  • the aim of the invention is to provide a solution to the taste and odor degradation of foodstuffs preserved in packages using at least one packaging foil allowing reclosing.
  • the use comprises one or more of the features of the dependent claims.
  • the package 10 shown in Figure 1 consists of a rectangular rigid tray 12 and a flexible cover 14 for closing an access passage 15 inside the tray.
  • the cover 14 is reclosable.
  • the total thickness of the lid is generally less than 150 microns to obtain the desired flexibility.
  • the tray 12 consists of a support layer 16 of suitable material, for example polyvinyl chloride or amorphous polyester (APET, CPET), covered on its inner surface with a weldable film 18, for example polyethylene.
  • suitable material for example polyvinyl chloride or amorphous polyester (APET, CPET)
  • the tray defines a receptacle 20 bordered around its entire periphery with a flange 22 delimiting a flat surface for welding the flexible cover 14 along a straight weld 23.
  • the cover 14 consists essentially of a support film 24 and a multilayer film 26 welding with a layer of permanent adhesive 28 interposed in flat between them over the entire surface.
  • the permanent adhesive 28 may be arranged only in marked areas of the lid, these areas being intended to form the sealing regions of the lid.
  • a transparent film 30 carrying prints 32 is secured to the support film 24 via a layer of adhesive 34 applied on its printed side.
  • the prints 32 are made on the film 30 and / or 24 on the front and / or back.
  • the welding multilayer film 26 has a solder layer 36 adapted to form the inner surface of the package. It is intended to be welded by heat-sealing on the weldable film 18 of the tray 12. According to the invention, the welding film 26 also comprises at least one layer 37 forming a barrier to gases and molecular migrations. This layer 37 is able to block the movement of molecules of small sizes or oligomers.
  • the welding film 26 comprises a single barrier layer.
  • the prints 32 are made on the film 30 and / or 24 on the front and / or back.
  • the welding film 26 comprises a bonding layer 38 disposed in contact with the permanent adhesive layer 28.
  • the migration and gas barrier layer is interposed between the solder layer 36 and the bonding layer 38.
  • the welding film 26 can be obtained by bubble type coextrusion or cast type ("cast" in English) or by extrusion of each of the layers, coating and coating thereof.
  • the longitudinal weld 23 is obtained by heat sealing. During welding, the welding film 18 and the welding layer 36 melt together, to obtain after cooling a very reliable weld. In particular, the tensile strength of the weld 23 is greater than the tear resistance of the solder film 26, the tensile strength of the interfaces between the permanent adhesive layer and contact films 24 and 26, as well as to the tensile strength of the core of the adhesive layer 28.
  • the various layers and films of the cover 14 have the following characteristics.
  • the support film 24 is a 36 micron thick polyester film.
  • the permanent adhesive layer 28 is produced by coating with the aid of a liquid or solid adhesive mass.
  • the permanent adhesive layer can still be applied hot, in particular by extrusion.
  • a permanent adhesive commonly referred to as "hot melt” is ideal for this application. It is possible in particular to use PLASTOFLEX 8718 marketed by PARAMELT in Holland.
  • the thickness of the adhesive layer 28 is advantageously between 10 and 30 microns and preferably between 15 and 20 microns.
  • the transparent film 30 is for example a polyester film with a thickness of 12 microns.
  • This film may have particular functional characteristics, including sealing characteristics vis-à-vis certain gases. For this purpose, it is treated according to known techniques, such as coating.
  • the adhesive used to ensure the connection between the film 30 and the support film 24 is of any type adapted to the nature of the films to be bonded.
  • the following characteristics are relative to the welding film 26. This can, of course, be implemented with a layer 28 of permanent adhesive of any kind and a support film 24 of any appropriate nature, the layers 30 and 32 being optional.
  • the barrier layer 37 comprises a copolymer resin of ethylene and vinyl alcohol (EVOH) while the two layers 36 and 38 between which it is interposed are layers of polyethylene which can be connected to the layer of polyethylene. EVOH by a compatibilization bonding layer.
  • EVOH ethylene and vinyl alcohol
  • the welding film 26 is obtained by coextrusion of the EVOH layer during the extrusion of the two polymer layers between which it is enclosed
  • the copolymer of ethylene and of vinyl alcohol is for example that marketed under the reference EVAL LCH 101BD by the company Kura-Ray, the ethylene content being 38%.
  • the thickness of the barrier layer 37 is between 2 and 15 microns, that is preferably equal to substantially 3 microns.
  • the barrier layer (s) for gases and molecular migrations are formed, for example, of PVDC (polyvinylidene chloride), PETP (polyethylene terephthalate), PVOH (polyvinyl alcohol), SIOX (silica oxide) or Al 2 O 3 (aluminum oxide).
  • PVDC polyvinylidene chloride
  • PETP polyethylene terephthalate
  • PVOH polyvinyl alcohol
  • SIOX silicon oxide
  • Al 2 O 3 aluminum oxide
  • the total thickness of the welding film 26, consisting of the three aforementioned layers, is between 20 and 60 microns and is preferably substantially equal to 35 microns.
  • the thicknesses of the solder layer 36 and the bonding layer 38 are preferably substantially equal, each being between 10 and 20 microns, and preferably substantially equal to 15 microns. They are preferably made of the same polymer and in particular polyethylene.
  • the polyethylene used to form the layers 36 and 38 has a melt index of between 1.5 and 4.5 g / 10 minutes.
  • this index is between 3 and 4 g / 10 minutes and is preferably substantially equal to 3.5 g / 10 minutes.
  • the melt index is calculated according to the ASTM D1238 standard.
  • the density of the polyethylene used for the layers 36 and 38 is preferably between 0.920 and 0.940.
  • this density is between 0.930 and 0.936. It is preferably substantially equal, for example, to 0.933.
  • the layers 36 and 38 are formed of LDPE (low density polyethylene), LLDPE (linear polyethylene), MDPE (medium-density polyethylene) or an ionomer (for example "SURLYN” sold by the company Dupont de Nemours), a mixture of these products, or polypropylene (homo or copolymer).
  • LDPE low density polyethylene
  • LLDPE linear polyethylene
  • MDPE medium-density polyethylene
  • ionomer for example "SURLYN” sold by the company Dupont de Nemours
  • polypropylene homo or copolymer
  • the welding film 26 comprises three layers. However, alternatively, the tie layer 38 is removed and the permanent adhesive layer 28 is then applied directly to the gas barrier and molecular migration layer 37.
  • the bonding layer 38 may also be suitably treated to impart gas barrier and molecular migration properties. This treatment is for example a vacuum deposition of aluminum oxide, silica or metal oxide at different levels of purity.
  • the layer 38 may be made of a barrier material, different in nature from that forming the layer 37.
  • the layer 38 may for example be made of polyester.
  • the welding film 26 comprises at least two distinct layers forming a barrier to gases and molecular migrations, these two layers being separated from each other by an intermediate layer.
  • the welding film comprises for example five layers consisting of two barrier layers which may be of the same or different type and of equal or different thickness and consist for example of EVOH, of an intermediate layer interposed between the two layers.
  • two barrier layers a solder layer forming the inner surface of the package and a bonding layer on which the permanent adhesive layer is applied.
  • the welding film 26 comprising at least two barrier layers is advantageously obtained by coextrusion.
  • the welding film 26 breaks on both sides of the welded zone.
  • the solder layer 26, the barrier layer 37 and the bonding layer 38 break.
  • the cover 14 is separated from the tray 12, along at least a portion of the length of the flange 22. It forms a welded bead noted 40.
  • the permanent adhesive layer 28 breaks in its intermediate portion or delaminates at its interface with the film 24 or the film 26.
  • a part, marked 42, of the permanent adhesive layer remains on the welded bead 40, while the complementary part, denoted 44, remains on the support film 24.
  • the two complementary parts 42, 44 each have a thickness substantially equal to half the total thickness of the layer 28.
  • a packaging sheet as described here and comprising a layer forming a barrier to gases and molecular migrations interposed between the layer of permanent adhesive and a sealing layer capable of ensuring the welding with the complementary part of the packaging the foodstuffs contained in the packaging do not have their taste and / or olfactory properties degraded.
  • the seal is obtained by association of extruded films separately, the latter being bonded to each other in particular by gluing.
  • the lid is formed by coextrusion of the various films, the layers constituting the welding film being then coextruded simultaneously with the other films of the lid.
  • the laminated sheet has a permanent adhesive layer only in regions to be welded to the rim of the tray.
  • the support film and the weldable film are bonded to each other by a layer of glue of any suitable type.
  • the sheet according to the invention is described here applied to the sealing of a tray. However, this could be used to form a resealable bag. In the latter case, the permanent adhesive may also be disposed only in the sealing zones of the bag.
  • a barrier layer integrated into the weldable film also provides a solution to the problem of the inefficiency of a possible barrier layer when it is disposed, as is the case in the state of the art, on the side of the base film with respect to the permanent adhesive layer.
  • the gas barrier layer and molecular migrations layer is disposed on the inner side of the package with respect to the permanent adhesive layer, even in case of delamination of this layer, the gas barrier layer and molecular migration remains maintained on the entire surface of the opening of the package since this layer forming a gas barrier and molecular migrations is integrated in the welding film.
  • the gas barrier and molecular migrating layer is formed of polyester or copolyester. These are advantageously formed of amorphous copolyester.
  • the amorphous copolyester used is of the PETG or PCTG type.
  • the amorphous copolyester PETG type is an amorphous polyester obtained from terephatalic acid and a premixed mixture of ethylene glycol with, in a smaller amount by mol 1,4-cyclohexanedimethanol.
  • the PCTG-type amorphous polyester is an amorphous polyester obtained from terephthalic acid and a premixed mixture of 1,4-cyclohexanedimethanol with, to a lesser extent, mole of ethylene glycol.
  • the welding layer and the gas barrier and molecular migration layer are advantageously one and the same layer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wrappers (AREA)
  • Laminated Bodies (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Packages (AREA)
EP01400838A 2000-03-31 2001-04-02 Utilisation d'une feille d'emballage stratifiée Revoked EP1138610B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0004155A FR2807015B1 (fr) 2000-03-31 2000-03-31 Feuille d'emballage stratifiee et emballage refermable la comportant
FR0004155 2000-03-31

Publications (2)

Publication Number Publication Date
EP1138610A1 EP1138610A1 (fr) 2001-10-04
EP1138610B1 true EP1138610B1 (fr) 2006-06-21

Family

ID=8848747

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01400838A Revoked EP1138610B1 (fr) 2000-03-31 2001-04-02 Utilisation d'une feille d'emballage stratifiée

Country Status (7)

Country Link
EP (1) EP1138610B1 (pt)
AT (1) ATE330869T1 (pt)
DE (1) DE60120814T2 (pt)
DK (1) DK1138610T3 (pt)
ES (1) ES2267693T3 (pt)
FR (1) FR2807015B1 (pt)
PT (1) PT1138610E (pt)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2143557A1 (en) 2008-07-07 2010-01-13 Alcan Technology & Management Ltd. Packaging film for manufacturing reclosable packaging

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH695774A5 (de) * 2002-07-29 2006-08-31 Zane Internat Inc Verschlusseinrichtung für einen Verpackungsbehälter.
DE10302320A1 (de) * 2003-01-20 2004-07-29 Wipak Walsrode Gmbh & Co.Kg Wiederverschließbare Verpackung
EP1524107A1 (en) * 2003-10-17 2005-04-20 Amcor Flexibles Europe Laminated packaging sheet
FR2889689B1 (fr) * 2005-08-12 2010-08-13 Socoplan Dispositif de conditionnement et de distribution d'un echantillon de produit fluide totalement hermetique et etanche au fluide
DE102005044969B3 (de) * 2005-09-20 2007-04-05 Nordenia Deutschland Gronau Gmbh Verbundfolie zur Herstellung wiederverschließbarer Trayverpackungen
IL280825A (en) * 2021-02-11 2022-09-01 C L P Ind Ltd Packages with a resealable safety seal

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3416755A1 (de) * 1984-05-07 1985-11-07 Nyffeler, Corti AG, Kirchberg Kalt- oder heisssiegelbare mehrschichtfolie fuer wiederverschliessbare verpackungen
CA1296852C (en) * 1985-10-11 1992-03-10 Henry George Schirmer High oxygen barrier coextruded film
FR2669607B1 (fr) * 1990-11-26 1995-05-12 Torterotot Couvercle souple de securite refermable.
US5296070A (en) * 1991-05-31 1994-03-22 Toppan Printing Co., Ltd. Process for producing liquid-container material
FR2782066B1 (fr) * 1998-08-07 2000-11-03 Danisco Flexible France Feuille d'emballage stratifiee et emballage refermable la comportant
DE69916439T2 (de) * 1999-06-10 2005-04-21 Wipak Gryspeert S A Verpackung mit Originalitätssucherung und deren Verfahren zu deren Herstellung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2143557A1 (en) 2008-07-07 2010-01-13 Alcan Technology & Management Ltd. Packaging film for manufacturing reclosable packaging

Also Published As

Publication number Publication date
ES2267693T3 (es) 2007-03-16
PT1138610E (pt) 2006-11-30
DE60120814T2 (de) 2007-01-18
ATE330869T1 (de) 2006-07-15
EP1138610A1 (fr) 2001-10-04
DE60120814D1 (de) 2006-08-03
FR2807015A1 (fr) 2001-10-05
DK1138610T3 (da) 2006-10-30
FR2807015B1 (fr) 2003-04-25

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