EP0978460A1 - Mehrschichtige Verpackungsfolie und damit versehene wiederverschliessbare Verpackung - Google Patents

Mehrschichtige Verpackungsfolie und damit versehene wiederverschliessbare Verpackung Download PDF

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Publication number
EP0978460A1
EP0978460A1 EP99401842A EP99401842A EP0978460A1 EP 0978460 A1 EP0978460 A1 EP 0978460A1 EP 99401842 A EP99401842 A EP 99401842A EP 99401842 A EP99401842 A EP 99401842A EP 0978460 A1 EP0978460 A1 EP 0978460A1
Authority
EP
European Patent Office
Prior art keywords
film
layer
permanent adhesive
laminated packaging
adhesive
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.)
Granted
Application number
EP99401842A
Other languages
English (en)
French (fr)
Other versions
EP0978460B1 (de
EP0978460B2 (de
Inventor
Jacques Hauchecorne
Michel Paul Louis Wemaere
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
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Application filed by Danisco Flexible France filed Critical Danisco Flexible France
Priority to EP04014338A priority Critical patent/EP1491459A1/de
Publication of EP0978460A1 publication Critical patent/EP0978460A1/de
Publication of EP0978460B1 publication Critical patent/EP0978460B1/de
Application granted granted Critical
Publication of EP0978460B2 publication Critical patent/EP0978460B2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10—Container closures formed after filling
    • B65D2577/20—Container closures formed after filling by applying separate lids or covers
    • B65D2577/2025—Multi-layered container, e.g. laminated, coated

Definitions

  • the present invention relates to a laminated packaging sheet of the type comprising a support film associated with a weldable film between which is interposed, at least in identified areas, a layer of an adhesive permanent, linked to the support film and to the film weldable at two interfaces of connection, formed on either side of the intermediate part of the layer permanent adhesive.
  • Packages with a packaging sheet allowing easy opening and reclosing are currently used for example for packaging food products.
  • the structure of such leaves is described in particular in French patent application FR-A-95-14117.
  • the laminated sheet used to allow the opening and the reclosure of the packaging comprises two films of polymer between which a layer of permanent adhesive is interposed.
  • welding film is intended to be oriented towards inside the package. It is suitable to be welded to the peripheral rim a tray.
  • the other film is intended to form the outer side of the package.
  • Leaf packaging has a structure such that the welded bead of the welding film is separates from the layer of permanent adhesive which remains completely integral with the support film. After release of the sheet, the welded bead is devoid permanent adhesive, which is worn only on the backing film.
  • the adhesive permanent is reapplied on the welded bead on the tray, in order to reconstitute a bonding interface between the welded bead and permanent adhesive.
  • the object of the invention is to propose a packaging sheet allowing, after an initial opening, an easy and reliable replacement thereof to seal the packaging.
  • the subject of the invention is a laminated packaging sheet of the aforementioned type, characterized in that the tensile strength perpendicularly at the joint plane of each of the two link interfaces is greater the tensile strength of the intermediate region of the thickness of the layer of permanent adhesive between the two bonding interfaces.
  • the invention further relates to a packaging comprising a wall external delimiting a housing provided with an access passage to said housing, characterized in that said passage is closed by a laminated sheet according to any one of the preceding claims, which sheet is welded to said outer wall at the periphery of said passage, according to its film weldable in a marked area of the sheet which is provided with adhesive permanent.
  • the packaging 10 shown in Figure 1 consists of a tray rectangular 12 and a flexible cover 14 for closing a passage access 15 inside the tray.
  • the tray 12 consists of a support layer 16 made of material suitable, for example polyvinyl chloride, covered on its surface interior of a weldable film 18, for example of polyethylene.
  • the tray defines a receptacle 20 bordered around its entire periphery rim 22 delimiting a flat welding surface of the flexible cover 14 following a straight weld 23.
  • the cover 14 consists essentially of a support film 24 and a weldable film 26 with a layer of permanent adhesive 28 interposed flat between them over the entire surface.
  • a transparent film 30 carrying impressions 32 is secured to the support film 24 by means of a layer of adhesive 34 applied to its printed side.
  • the layer of permanent adhesive 28, linked to the support film 24, defines a first bonding interface 36.
  • the layer 28 is also bonded to the film welding 26 by a second link interface denoted 38.
  • the interfaces of connection 36, 38 are provided on either side of the thickness of the layer permanent adhesive.
  • the middle part of the permanent adhesive layer defined between the bonding interfaces also called the core of the adhesive layer, do not not modified by bonding, unlike the boundary layers constituting link interfaces.
  • the middle part of layer 28 is therefore formed only from permanent adhesive which has not undergone any transformation physico-chemical.
  • the tensile strength perpendicular to the joint plane of each of the two link interfaces 36, 38 is greater the tensile strength of the core of the permanent adhesive layer 28.
  • the force of adhesion of the permanent adhesive layer 28, on the one hand to the support film 24 and on the other hand to the welding film 26, along the connection interfaces 36 and 38, is greater than the cohesive force of the layer of permanent adhesive 28 at the heart of it.
  • These surface treatments include for example a treatment mechanical, applying a layer of primary adhesion plaster, or Corona treatment. Different types of treatment will be described in more detail in the following description.
  • the material forming the welding film 26 is chosen so that it has lower tear strength than tensile strength of the core of the permanent adhesive layer 28.
  • the longitudinal weld 23 is obtained by heat sealing. During the welding, the welding films 18 and 26 melt together, making it possible to obtain after cooling a very reliable weld. In particular, resistance to the tensile strength of the weld 23 is greater than the tear strength of the weldable film 26, tensile strength of interfaces 36 and 38, as well than the tensile strength of the core of the adhesive layer 28.
  • the different layers and films of the cover 14 have the following features.
  • the support film 24 is a 36 micron polyethylene film thick.
  • the welding film 26 is a polyethylene film produced from "Escorene" resin with a thickness of 40 microns adapted to be bonded by heat sealing with film 18 to form the longitudinal weld 23.
  • the layer of permanent adhesive 28 is produced by coating using an adhesive mass initially in solution, especially in dispersion aqueous.
  • the layer of permanent adhesive can still be applied hot, especially 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 sold by the company PARAMELT in Holland.
  • the thickness of the adhesive layer 28 is advantageously included between 10 and 30 microns and in particular equal to about 20 microns.
  • the transparent film 30 is for example a coated polyethylene film with a thickness of 12 microns.
  • This film may have characteristics particular functional features, including sealing characteristics vis-à-vis certain gases. To this end, it is treated according to known techniques adapted.
  • the adhesive used to ensure the connection between the film 30 and the support film 24 is of any type adapted according to the nature of the films to be bound.
  • a primary coating of adhesion is applied to the two faces opposite the films 24 and 26 before placing the permanent adhesive layer 28.
  • This coating adhesion primer is for example based on polyurethane.
  • the coating marketed in France by BASF under the trade name SOP 815 is suitable for this application.
  • the primary adhesion coating is replaced at interfaces 36 and 38 by a stamping or embossing carried out by calendering the facing faces of films 24 and 26.
  • the facing faces of the films 24 and 26 are initially subjected to treatment aimed at increasing its surface tension.
  • This treatment is advantageously a treatment to Corona effect.
  • This is advantageously carried out on the support film 24 so as to obtain a surface tension of between 45 and 48 dynes / cm.
  • the Corona treatment is advantageously carried out on the face of the welding film 26 in order to obtain a surface tension of between 44 and 46 dynes / cm.
  • the force to be applied to achieve separation of the adhesive permanent and one or other of films 24 and 26 respectively according to interfaces 36 and 38 is 12 N, while the force to be applied to break the adhesive at the heart of layer 28 is only 7 N to 9 N.
  • the welding film 26 breaks on either side of the welded zone.
  • the cover 14 is separated from the tray 12, following at least part of the length of the rim 22. Only one strip, coming from the welding film 26, remains welded to the rim 22. It forms a welded bead noted 40.
  • part, denoted 42 of the layer permanent adhesive remains on the welded bead 40, while the portion additional, noted 44, remains on the support film 24.
  • the two parts complementary 42, 44 each have a thickness substantially equal to the half of the total thickness of layer 28. Their thickness is therefore included between 5 and 15 microns depending on the thickness of the adhesive layer.
  • the two parts of the adhesive layer 28 are brought back into contact with one another in a unmodified region of the layer since, apart from the binding interfaces 36 and 38.
  • the connection between the cover 14 and the tray 12 is restored directly at the core of the adhesive layer, which improves performance of the new link.
  • the laminated sheet has a layer permanent adhesive only in areas to be welded on the edge of the tray.
  • the support film and the weldable film are linked to each other by a layer of glue of any suitable type.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wrappers (AREA)
  • Laminated Bodies (AREA)
  • Packages (AREA)
EP99401842A 1998-08-07 1999-07-21 Mehrschichtige Verpackungsfolie und damit versehene wiederverschliessbare Verpackung Expired - Lifetime EP0978460B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04014338A EP1491459A1 (de) 1998-08-07 1999-07-21 Mehrschichtige Verpackungsfolie und damit versehene wiederverschliessbare Verpackung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9810217A FR2782066B1 (fr) 1998-08-07 1998-08-07 Feuille d'emballage stratifiee et emballage refermable la comportant
FR9810217 1998-08-07

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP04014338A Division EP1491459A1 (de) 1998-08-07 1999-07-21 Mehrschichtige Verpackungsfolie und damit versehene wiederverschliessbare Verpackung

Publications (3)

Publication Number Publication Date
EP0978460A1 true EP0978460A1 (de) 2000-02-09
EP0978460B1 EP0978460B1 (de) 2004-09-29
EP0978460B2 EP0978460B2 (de) 2009-07-15

Family

ID=9529535

Family Applications (2)

Application Number Title Priority Date Filing Date
EP04014338A Withdrawn EP1491459A1 (de) 1998-08-07 1999-07-21 Mehrschichtige Verpackungsfolie und damit versehene wiederverschliessbare Verpackung
EP99401842A Expired - Lifetime EP0978460B2 (de) 1998-08-07 1999-07-21 Mehrschichtige Verpackungsfolie und damit versehene wiederverschliessbare Verpackung

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP04014338A Withdrawn EP1491459A1 (de) 1998-08-07 1999-07-21 Mehrschichtige Verpackungsfolie und damit versehene wiederverschliessbare Verpackung

Country Status (7)

Country Link
EP (2) EP1491459A1 (de)
AT (1) ATE277833T1 (de)
DE (2) DE978460T1 (de)
DK (1) DK0978460T4 (de)
ES (1) ES2182737T5 (de)
FR (1) FR2782066B1 (de)
PT (1) PT978460E (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1138610A1 (de) * 2000-03-31 2001-10-04 Danisco Flexible France Geschichteter Verpackungsfilm und diesen Film enthaltene, wiederverschliessbare Verpackung
FR2814152A1 (fr) * 2000-09-21 2002-03-22 Danisco Flexible France Couvercle d'obturation d'une ouverture d'acces a un contenant et emballage le comportant
FR2817502A1 (fr) * 2000-12-06 2002-06-07 Pechiney Emballage Flexible Eu Materiau d'operculage pelable et refermable
WO2003013976A1 (de) * 2001-08-06 2003-02-20 Henkel Kommanditgesellschaft Auf Aktien Wiederverschliessbare verpackung
EP2716439A1 (de) * 2012-10-04 2014-04-09 egeplast international GmbH Gegenstand mit mehrschichtiger Außenseite

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2813441A1 (de) 2013-06-11 2014-12-17 Mondi Consumer Packaging Technologies GmbH Folienaufreißverpackung sowie Verwendung einer flexiblen, zumindest dreischichtigen Coextrusionsfolie zur Herstellung einer Folienaufreißverpackung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0554152A1 (de) * 1992-01-27 1993-08-04 SOCIETE ALSACIENNE D'ALUMINIUM Société Anonyme Behälter mit einer wiederverschliessbaren Deckelfolie, die mit permanent klebender Schicht aufgebracht ist
FR2741605A1 (fr) * 1995-11-29 1997-05-30 Soplaril Sa Structure d'obturation pour un contenant, contenant muni de cette structure et procede d'obturation du contenant
WO1997025200A1 (en) * 1996-01-11 1997-07-17 Ato Findley, Inc. Resealable packaging system
EP0812782A1 (de) * 1995-05-16 1997-12-17 Societe Alsacienne D'aluminium Verbundbahn von abziehbaren Deckeln für thermoplastische Behälter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5172854A (en) † 1991-10-16 1992-12-22 Moshe Epstein Reclosable, reusable package
DE9403710U1 (de) † 1993-03-24 1994-05-26 Bischof Und Klein Gmbh & Co, 49525 Lengerich Transparente selbstklebende Oberflächenschutzfolie
WO1996040504A1 (en) † 1995-06-07 1996-12-19 Pechiney Recherche Strip for forming peelable reclosable packaging material and package

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0554152A1 (de) * 1992-01-27 1993-08-04 SOCIETE ALSACIENNE D'ALUMINIUM Société Anonyme Behälter mit einer wiederverschliessbaren Deckelfolie, die mit permanent klebender Schicht aufgebracht ist
EP0812782A1 (de) * 1995-05-16 1997-12-17 Societe Alsacienne D'aluminium Verbundbahn von abziehbaren Deckeln für thermoplastische Behälter
FR2741605A1 (fr) * 1995-11-29 1997-05-30 Soplaril Sa Structure d'obturation pour un contenant, contenant muni de cette structure et procede d'obturation du contenant
WO1997025200A1 (en) * 1996-01-11 1997-07-17 Ato Findley, Inc. Resealable packaging system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1138610A1 (de) * 2000-03-31 2001-10-04 Danisco Flexible France Geschichteter Verpackungsfilm und diesen Film enthaltene, wiederverschliessbare Verpackung
FR2807015A1 (fr) * 2000-03-31 2001-10-05 Danisco Flexible France Feuille d'emballage stratifiee et emballage refermable la comportant
FR2814152A1 (fr) * 2000-09-21 2002-03-22 Danisco Flexible France Couvercle d'obturation d'une ouverture d'acces a un contenant et emballage le comportant
FR2817502A1 (fr) * 2000-12-06 2002-06-07 Pechiney Emballage Flexible Eu Materiau d'operculage pelable et refermable
WO2002045949A1 (fr) * 2000-12-06 2002-06-13 Pechiney Emballage Flexible Europe Materiau d'operculage pelable et refermable
WO2003013976A1 (de) * 2001-08-06 2003-02-20 Henkel Kommanditgesellschaft Auf Aktien Wiederverschliessbare verpackung
EP2716439A1 (de) * 2012-10-04 2014-04-09 egeplast international GmbH Gegenstand mit mehrschichtiger Außenseite

Also Published As

Publication number Publication date
DE69920597D1 (de) 2004-11-04
DE69920597T2 (de) 2005-02-17
FR2782066B1 (fr) 2000-11-03
DE69920597T8 (de) 2005-11-03
DE978460T1 (de) 2003-05-28
DE69920597T3 (de) 2009-12-17
ES2182737T3 (es) 2005-04-16
PT978460E (pt) 2005-02-28
ES2182737T1 (es) 2003-03-16
ATE277833T1 (de) 2004-10-15
EP0978460B1 (de) 2004-09-29
ES2182737T5 (es) 2009-10-30
EP0978460B2 (de) 2009-07-15
FR2782066A1 (fr) 2000-02-11
DK0978460T4 (da) 2009-11-02
EP1491459A1 (de) 2004-12-29
DK0978460T3 (da) 2005-01-31

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