EP2484601A1 - Feuille multicouche pour emballages à microondes verrouillées étanches au gaz - Google Patents

Feuille multicouche pour emballages à microondes verrouillées étanches au gaz Download PDF

Info

Publication number
EP2484601A1
EP2484601A1 EP11153239A EP11153239A EP2484601A1 EP 2484601 A1 EP2484601 A1 EP 2484601A1 EP 11153239 A EP11153239 A EP 11153239A EP 11153239 A EP11153239 A EP 11153239A EP 2484601 A1 EP2484601 A1 EP 2484601A1
Authority
EP
European Patent Office
Prior art keywords
multilayer film
layer
packaging
film according
susceptor surface
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Withdrawn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
EP11153239A
Other languages
German (de)
English (en)
Inventor
Maik Hach
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.)
Nordenia Technologies GmbH
Original Assignee
Nordenia Technologies 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 Nordenia Technologies GmbH filed Critical Nordenia Technologies GmbH
Priority to EP11153239A priority Critical patent/EP2484601A1/fr
Publication of EP2484601A1 publication Critical patent/EP2484601A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
    • B65D81/3446—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
    • 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
    • B65D51/00—Closures not otherwise provided for
    • B65D51/16—Closures not otherwise provided for with means for venting air or gas
    • B65D51/1633—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element
    • B65D51/1638—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element by means of an element bursting upon a predetermined pressure in the container being exceeded
    • 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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
    • B65D81/3446—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
    • B65D81/3461—Flexible containers, e.g. bags, pouches, envelopes

Definitions

  • the invention relates to a multilayer film for gas-tight sealed microwave packaging with a sealable layer on the inside of the packaging and at least one further layer which forms a cover layer on the outside of the package.
  • a sealable layer on the inside of the packaging and at least one further layer which forms a cover layer on the outside of the package.
  • microwave packaging is meant the packaging of a food which is heated in a microwave oven. When heated, the food remains inside the closed package.
  • the multilayer film described above can form a closed pouch packaging or used as a cover, the z. B. is applied gas-tight on a shell.
  • the microwave packaging may be an inert gas, e.g. As nitrogen, CO 2 or the like for preserving the food.
  • microwave packaging When heating a gas-tight microwave packaging pressure builds up in the interior of the package by expanding the inert gas and / or by releasing water vapor.
  • the microwave packaging must therefore have a device for venting, so that the overpressure can escape during heating.
  • labels or other valve elements are used. Such additional elements to be applied are expensive to apply, hinder the winding of the multilayer film on a roll and cause additional costs.
  • WO 2007/127519 A1 is a multilayer film for gastight microwave packaging sealed with the features described above.
  • the film contains openings which do not completely penetrate the multilayer film.
  • the openings form predetermined breaking points, which should open when pressure builds up within the packaging by heating the packaged food.
  • the production of such a film is expensive. If the covering layer is perforated before it is glued to the sealing layer, the openings provided as predetermined breaking points set and are no longer functional. If the openings z. B. by punching or by means of a laser technology subsequently introduced into the multilayer film, it is difficult to set the penetration depth reliable and reproducible so that the microwave packaging opens at a defined pressure. If z. B.
  • the openings are not deep enough and it can not be vented. In this case, uncontrolled bursting of the packaging occurs when the food is heated in the microwave oven. If the laser power is too high, holes are created which completely penetrate the film, so that the packaging is not gastight and spoils the packaged food quickly.
  • WO 2009/120739 A2 is a microwave packaging known, which consists of a multilayer film and is closed by a peelable seal.
  • the peelable sealing seam connects two overlapping film sections, wherein a film surface is designed as a susceptor surface and has a microwave-absorbing material which heats up upon microwave irradiation and reduces the adhesive force of the peel seam by heating. If pressure builds up in the microwave oven due to heating of packaged food, the peelable sealing seam opens locally so that the overpressure can escape. However, the opening behavior of the peel seam is dependent on a multiplicity of factors z. B. the dimensions and adhesive properties of the peel seam and is difficult to regulate and poorly reproducible.
  • the invention has for its object to provide a universally usable multi-layer film for microwave packaging, which allows a gas-tight closure of the package until heating and ensures reliable ventilation of the packaging when the packaging is heated with a food packaged therein in a microwave oven.
  • the object is achieved in that in the region of the predetermined breaking points at least one susceptor surface is arranged, which heats up in a microwave irradiation and heats the film at the predetermined breaking points.
  • the predetermined breaking points preferably consist of holes which form a perforation and do not completely penetrate the multilayer film.
  • the openings may be introduced into the cover layer, wherein the openings do not extend into the sealing layer or at least do not completely penetrate the sealing layer.
  • the holes can be made by means of a stamping technique.
  • the holes are introduced by laser beams in the multilayer film.
  • the susceptor surface causes the film is heated in a heating of the packaged food in a microwave oven in the region of the predetermined breaking points and decreases the strength of the film in the region of the perforation.
  • the force for piercing the predetermined breaking points for releasing the vents is reduced. Due to the local weakening of the film, the predetermined breaking points open even if the perforations are not as deep as desired. Larger deviations in the depth of the perforation holes are tolerable without adversely affecting venting upon microwave heating of the microwave package.
  • the openings for the predetermined breaking points may have a depth which is between 30% and 90% of the film thickness. In this area, changes in the depth of the perforations are allowed without any detrimental effect on the venting properties.
  • the predetermined breaking points are provided as a tear-open or part of a tear-open the package.
  • the susceptor surface may be arranged on the outside of the film.
  • the cover layer on the outside of the package is chosen so that the susceptor surface does not come into contact with the packaged food.
  • the susceptor surface can be arranged in the interior of the film and is in particular laminated between the cover layer and the sealable layer. It is further within the scope of the invention that the susceptor surface is disposed within the sealable layer between two layers of sealable material.
  • the susceptor surface and the sealable layers can also form a laminate on which the cover layer is laminated. In the context of the invention, however, coextruded films can also be used, in which case the susceptor surface is usually provided on an outer side of the film.
  • the susceptor surface may be a metallized film or may be carbon black, ferrites, conductive polymers or a mixture thereof. Preferably, inexpensive carbon black is used. Electrically conductive polymers are known for other applications and are used in known measures, z. B. in RFID technology, used as materials for batteries, sensors and the like. Polyaniline, polypyrrole or poly-3-alkylthiopene are particularly suitable here.
  • the sheet resistance of the susceptor layer is preferably less than 20 kOhms (20 kOhms / square), especially less than 10 kOhms (10kOhms / square). For better identification and differentiation from the usual electrical resistance, the unit resistance Ohm / square, which is considered in parentheses, is often used for the sheet resistance.
  • multilayer film is intended to form gas-tight sealed microwave packaging. These are used to package food that is heated in a microwave oven when the packaging is closed.
  • the multilayer film can be used as a film covering a shell. It is also possible to produce a tubular bag which is closed on all sides and encloses the packaged goods in a gastight manner.
  • multilayer film has a sealable layer 1 on the inside of the packaging and at least one further layer forming a cover layer 2 on the outside of the package, on.
  • openings 3 are introduced, which do not fully enforce the sealable layer and form predetermined breaking points 3 '.
  • the predetermined breaking points 3 ' open under a pressure that builds up within the microwave packaging by heating the food by means of microwaves.
  • the predetermined breaking points 3 ' open when the microwave packaging is heated in a microwave oven, so that the overpressure arising when the food is heated can escape within the packaging.
  • the diagram illustrates this.
  • the diagram refers to a multilayer film which has a 75 ⁇ m thick sealable layer of a polyolefin, in particular a polyethylene, and a 12 ⁇ m thick cover layer of a polyester.
  • the perforation holes have been introduced by a laser technology, which does not fully enforce the sealable layer 1 and form predetermined breaking points 3 '. If the film has no susceptor surfaces, the perforation holes must be as shown in Fig. 4 have a depth of at least 70% based on the film thickness, so that the predetermined breaking points 3 'rupture when the microwave packaging is heated in a microwave oven.
  • the work area A relative to the original working area A' increases such that holes with a penetration depth of 30% based on the film thickness already form predetermined breaking points 3 ', which rupture when heated packaged food in the microwave oven.
  • the usable working area and the reliability of a vent become larger.
  • multilayer film has susceptor surfaces 4, which are arranged on the outside of the film. They are applied to the outer layer 2 on the outside of the packaging and thus do not come into contact with packaged food.
  • multilayer film has susceptor surfaces 4 ', which are arranged in the interior of the film and between the cover layer 2 and the sealable layer 1 are laminated.
  • a susceptor surface 4 " is disposed between sealable material layers 5, 6 within the sealable layer 1.
  • the susceptor surface 4" and the sealable layers 5, 6 may form a laminate onto which the cover layer 2 is laminated.
  • the susceptor surfaces 4, 4 ', 4 " may consist of a metallized film or a carbon black / ferritic coating
  • the susceptor surfaces 4, 4', 4" consist of an electrically conductive polymer.
  • polyanilines, polypyrroles and poly (3-alkylthiophenes) are suitable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Package Specialized In Special Use (AREA)
EP11153239A 2011-02-03 2011-02-03 Feuille multicouche pour emballages à microondes verrouillées étanches au gaz Withdrawn EP2484601A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11153239A EP2484601A1 (fr) 2011-02-03 2011-02-03 Feuille multicouche pour emballages à microondes verrouillées étanches au gaz

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11153239A EP2484601A1 (fr) 2011-02-03 2011-02-03 Feuille multicouche pour emballages à microondes verrouillées étanches au gaz

Publications (1)

Publication Number Publication Date
EP2484601A1 true EP2484601A1 (fr) 2012-08-08

Family

ID=44166447

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11153239A Withdrawn EP2484601A1 (fr) 2011-02-03 2011-02-03 Feuille multicouche pour emballages à microondes verrouillées étanches au gaz

Country Status (1)

Country Link
EP (1) EP2484601A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2714540B1 (fr) * 2011-05-26 2018-01-24 Amcor Flexibles Transpac B.V.B.A. Emballage a fermeture hermetique à chauffer dans un four à micro-ondes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003009997A1 (fr) * 2001-07-23 2003-02-06 Abdul Aziz Okhai Film d'emballage
WO2007127519A2 (fr) 2006-02-08 2007-11-08 General Mills Marketing, Inc. Pochette permettant de cuire des legumes a la vapeur
WO2009120739A2 (fr) 2008-03-27 2009-10-01 Graphic Packaging International, Inc. Conditionnement de chauffage à micro-ondes autoventilant

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003009997A1 (fr) * 2001-07-23 2003-02-06 Abdul Aziz Okhai Film d'emballage
WO2007127519A2 (fr) 2006-02-08 2007-11-08 General Mills Marketing, Inc. Pochette permettant de cuire des legumes a la vapeur
WO2009120739A2 (fr) 2008-03-27 2009-10-01 Graphic Packaging International, Inc. Conditionnement de chauffage à micro-ondes autoventilant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2714540B1 (fr) * 2011-05-26 2018-01-24 Amcor Flexibles Transpac B.V.B.A. Emballage a fermeture hermetique à chauffer dans un four à micro-ondes

Similar Documents

Publication Publication Date Title
EP1577226B1 (fr) Couvercle à deux couches
DE60309119T2 (de) Leicht zu öffnender Verschluss für einen sterilisierbaren Behälter
EP1559658B1 (fr) Elément de fermeture étampé, en forme de couvercle à double couche
DE60002814T2 (de) Rohrförmiger Behälter und einem mit inneren und äusseren Siegelwulst versehenen heissgesiegelten Deckel
DE60001614T2 (de) Verfahren zur Herstellung einer Siegelschicht für den Deckel eines Behälters und Behälter
EP2641839B1 (fr) Procédés de fabrication d'une coque pour un emballage à plateau
DE202010014256U1 (de) Folie zur Realisierung eines Ventils
DE60007963T2 (de) Behälter zur Aufnahme von zerbrechlichen Gegenständen sowie Verfahren zur Herstellung eines solchen Behälters
DE102009018489A1 (de) Verpackung, insbesondere Mikrowellen-Verpackungsbeutel, mit Druckausgleichsventil mit variablen Strömungsquerschnitt
EP2969478B1 (fr) Sachet tubulaire, procédé et dispositif de fabrication de sachets tubulaires
WO2007118649A1 (fr) Emballage compatible avec les micro-ondes
EP2285558B2 (fr) Section de film d'emballage, film d'emballage, emballage et ensemble emballage-produit
WO2010010130A2 (fr) Emballage refermable comportant une membrane pelable
EP2484601A1 (fr) Feuille multicouche pour emballages à microondes verrouillées étanches au gaz
EP2156947A1 (fr) Matériau composite et procédé de fabrication d'un sac tubulaire rempli
EP1882637B1 (fr) Récipient d'emballage
DE102013011481B4 (de) Deckel für einen Behälter, Verpackung mit einem Behälter und einem solchen Deckel sowie Verfahren zum Versiegeln eines Behälters mit einem solchen Deckel
EP2593303B1 (fr) Procédé de fabrication de composites de films constitués d'au moins un film composite
DE102009043360A1 (de) Aufreißverpackung
EP1912865B1 (fr) Conditionnement refermable apte aux micro-ondes
AT525838B1 (de) Mehrschichtige folie für aufreissverpackungen
DE102009021082A1 (de) Mehrschichtiges Laminat, Verfahren zur Herstellung, dessen Verwendung und daraus hergestellter Verpackungsbehälter, insbesondere für zumindest partiell dehydratisierte Lebensmittel
EP0221842A1 (fr) Orifice verseur dans un couvercle d'un conteneur avec opercule arrachable et fabrication de cet orifice
CH689186A5 (de) Aus einer Aluminiumfolie bestehender Aufreissdeckel auf einem Gebinde und Verfahren zur Herstellung eines Aufreissdeckels.
WO2008151348A1 (fr) Plaque en matériau composite

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20120425

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

17Q First examination report despatched

Effective date: 20130612

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20140902