WO2007060086A1 - Film stratifie multicouche formant une barriere resistante - Google Patents

Film stratifie multicouche formant une barriere resistante Download PDF

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Publication number
WO2007060086A1
WO2007060086A1 PCT/EP2006/068095 EP2006068095W WO2007060086A1 WO 2007060086 A1 WO2007060086 A1 WO 2007060086A1 EP 2006068095 W EP2006068095 W EP 2006068095W WO 2007060086 A1 WO2007060086 A1 WO 2007060086A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
laminated film
multilayer laminated
polyethylene
stretched
Prior art date
Application number
PCT/EP2006/068095
Other languages
English (en)
Inventor
Carlo Alberto Zaggia
Original Assignee
Alcan Packaging Italia S.R.L.
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 Alcan Packaging Italia S.R.L. filed Critical Alcan Packaging Italia S.R.L.
Publication of WO2007060086A1 publication Critical patent/WO2007060086A1/fr

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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • 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
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • 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
    • B32B2323/00—Polyalkenes
    • B32B2323/10—Polypropylene
    • 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
    • B32B2329/00—Polyvinylalcohols, polyvinylethers, polyvinylaldehydes, polyvinylketones or polyvinylketals
    • B32B2329/04—Polyvinylalcohol
    • 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
    • B32B2377/00—Polyamides
    • 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
    • B32B2439/70—Food packaging

Definitions

  • the present invention relates to a high-barrier multilayer laminated film.
  • the flexible multilayer laminated films used in the production of these pouches have excellent barrier properties against gases (particularly oxygen) and water, thus allowing the protection of the food contained in the pouches made of these films to approximate the protection provided with conventional jars or cans.
  • These multilayer laminated films generally comprise at least two layers: at least one first layer, made of heat- sealing plastic material, and at least one second outer layer made of a material chosen among plastics, metallic, paper-like or equivalent materials, each layer being coupled to the adjacent one by means of an intercalated layer of adhesive material.
  • the quintessential barrier material in these flexible laminated films is the aluminum sheet, with thicknesses which can vary from 6 to 30-40 microns.
  • the aluminum sheet therefore constitutes a layer of the laminated film.
  • Such aluminum layer combined with other biaxially-oriented layers of plastic material, such as for example polyester and/or polyamide, together with polyolefm layers such as polypropylene, allows to provide a multilayer film which, in addition to having the already-mentioned gas barrier properties, also allows the treatment of packaged food with thermal processes (such as pasteurization and sterilization) in order to extend their life.
  • plastic material such as for example polyester and/or polyamide
  • polyolefm layers such as polypropylene
  • These transparent multilayer films are constituted by biaxially- oriented polyester or polyamide layers with thicknesses between 12 and 25 microns and by a very thin layer of silica or alumina (between 50 and 100 nanometers) which provides a high barrier to gases and high transparency.
  • a very thin layer of silica or alumina between 50 and 100 nanometers
  • the barrier lining which is a ceramic or glass- like material, which leads to the risk of altering its barrier properties during a processing or packaging process; - the high cost;
  • barrier materials are constituted by coextruded films, which use polymers which have gas barrier properties, such as polyvinyl alcohol (PVOH) or polyethylene vinyl alcohol (or EVOH). These polymers have limited water barrier properties, and this characteristic is enhanced by extruding them in combination with polyolefin polymers such as polyethylene or polypropylene, but this water sensitivity makes them in any case scarcely suitable or not at all suitable for the heat treatment processes normally performed in steam autoclaves at temperatures of even 130 0 C for approximately one hour.
  • PVOH polyvinyl alcohol
  • EVOH polyethylene vinyl alcohol
  • PVOH by being water-soluble, cannot be used for this kind of application, while EVOH alters significantly the oxygen barrier in the presence of high humidity rates. Disclosure of the Invention
  • the aim of the present invention is to provide a high-barrier multilayer laminated film which is capable of obviating the problems and drawbacks revealed by known types of laminated film.
  • an object of the present invention is to provide a transparent film which is capable of maintaining high gas barrier properties even during a process for the processing or packaging of the food product contained in a pouch or other similar package produced with said film.
  • Another object of the present invention is to provide a multilayer film with which it is possible to obtain pouches or other similar packages which can be used to heat the food contained therein in a microwave oven.
  • Another object of the present invention is to provide a multilayer laminated film which can be manufactured with known systems and technologies.
  • a high-barrier multilayer laminated film characterized in that it comprises at least:
  • Figure 1 is a sectional view of a film according to the invention
  • Figure 2 is a sectional view of a film according to the invention in a second embodiment.
  • a high-barrier multilayer laminated film according to the invention in its first embodiment is generally designated by the reference numeral 10.
  • the film 10 comprises:
  • first layer 11 made of a material chosen among polypropylene, polyethylene and polyamide, with the main function of water barrier;
  • a second layer 12 made of polypropylene or polyethylene, which is suitable to allow the heat-sealing of two facing flaps of the film 10;
  • a third central layer 13 made of polyethylene vinyl alcohol (EVOH), which is interposed between the first layer 11 and the second layer 12 and is joined to them by means of an intercalated layer 14 of adhesive material.
  • the first layer 11, the second layer 12 and the third layer 13 are co- extruded and subsequently stretched.
  • the layers are coupled in pairs by means of intercalated layers 14 of adhesive material.
  • the film 10 is stretched and then oriented (mono- or biaxially) to the point that the central layer of EVOH has a thickness comprised between 1 and 20 microns, preferably 3 microns.
  • EVOH polyethylene vinyl alcohol
  • EVOH has a sensitivity to water which makes it scarcely suitable for the heat treatment processes normally performed in steam autoclaves at temperatures of even 130 0 C for times of for example 1 hour
  • the same EVOH, once stretched and oriented instead has far superior recovery times for the gas barrier properties lost in the heat treatment than other known films with the same use.
  • the recovery times of the gas barrier properties for the film 10 according to the invention are three times shorter than those of known co-extruded films, such as for example films composed of sequences of layers of PA/EVOH/PA (where PA is polyamide) and non- oriented PP/EVOH/PP.
  • the third central layer 13, which has limited water barrier properties, is appropriately co-extruded in combination with polypropylene.
  • the three layers i.e., the first layer 11, the second layer 12 and the third layer 13, have a total thickness between 30 and 200 microns, with a preferred value of approximately 70 microns.
  • the central layer 13 made of EVOH offers a higher gas barrier than said layers of known films.
  • a third layer 13 of EVOH is sufficient which is thinner than a known type of barrier layer, with important savings in terms of material used.
  • the film 10, in the form described here by way of non-limiting example of the invention, is completed by a fourth layer 15 made of a material chosen among polyester, polyamide or paper, which is coupled externally to the first layer 11 by means of an intercalated layer of adhesive material 14.
  • Coupling is performed after co-extrusion and stretching of the three layers, the first layer 11, the second layer 12 and the third layer 13.
  • the fourth layer 15 is suitable to be printed with distinctive, characteristic or ornamental markings referred to the characteristics of the food that is packaged with the film 10 or referred to the particularities of the film 10, or to anything else.
  • the multilayer laminated film according to the invention in its second embodiment, is generally designated by the reference numeral 110.
  • the film 110 comprises two additional layers 115a and 115b, each of which is made of a material chosen among polyester, polyamide or equivalents; said layers are superimposed as a consequence of the co- extrusion and stretching of the three layers, the first layer 111, the second layer 112 and the third layer 113.
  • the additional fourth and fifth layers 115a and 115b are coupled to each other and outside the first layer 111 by means of a corresponding intercalated layer of adhesive material 114.
  • the invention also relates to the use of a multilayer laminated film 10 and 110 as described above to produce pouches and other similar enclosures for the packaging of precooked and ready-to-eat foods, which must undergo thermal processes, such as pasteurization, sterilization and the like, while already stored within such a pouch or the like.
  • These pouches therefore utilize the above cited properties of the three layers, i.e., the first layers 11 and 11 1, the second layers 12 and 112, and the third layers 13 and 113, which are co-extruded and stretched, i.e., gas barrier, swiftness of recovery of the gas barrier, heat-sealing ability and overall strength.
  • the present invention provides a transparent high-barrier film by virtue of the absence of the layer of aluminum that is characteristic of known films, and is capable of maintaining high gas barrier properties even during a process for the processing or packaging of the food contained in a pouch or other similar packaging produced with said film.
  • the present invention further provides a multilayer film by means of which it is possible to obtain pouches or other similar packaging which can be used for heating in a microwave oven the food contained therein.
  • the present invention provides a film which is cheaper than known types of film, by way of the replacement of the expensive layer of silica or alumina which acts as a gas barrier with the central layer made of oriented EVOH. Moreover, the present invention provides a film which can be recycled easily by virtue of the fact that it does not comprise aluminum layers.
  • the present invention provides a multilayer laminated film which can be manufactured with known system and technologies.
  • the invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims; all the details may further be replaced with other technically equivalent elements.
  • the materials employed may be any according to requirements and to the state of the art.

Landscapes

  • Laminated Bodies (AREA)

Abstract

L’invention concerne un film stratifié multicouche formant une barrière résistante, comprenant au moins : une première couche (11) constituée de polypropylène ; une deuxième couche (12) constituée de polypropylène ou de polyéthylène ; une troisième couche centrale (13) constituée d’alcool polyéthylène vinylique (EVOH), positionnée entre la première couche (11) et la deuxième couche (12) et reliée à ces couches au moyen d’une couche intercalaire (14) constituée d’un matériau adhésif, lesdites première (11), deuxième (12) et troisième (13) couches étant coextrudées et étirées. Ce film stratifié multicouche convient à la fabrication de sachets et d’autres contenants similaires destinés à l’emballage d’aliments précuits et prêts à servir.
PCT/EP2006/068095 2005-11-24 2006-11-06 Film stratifie multicouche formant une barriere resistante WO2007060086A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPD2005A000339 2005-11-24
IT000339A ITPD20050339A1 (it) 2005-11-24 2005-11-24 Struttura di film laminato multistrato ad alta barriera

Publications (1)

Publication Number Publication Date
WO2007060086A1 true WO2007060086A1 (fr) 2007-05-31

Family

ID=37686081

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/068095 WO2007060086A1 (fr) 2005-11-24 2006-11-06 Film stratifie multicouche formant une barriere resistante

Country Status (2)

Country Link
IT (1) ITPD20050339A1 (fr)
WO (1) WO2007060086A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2489509A1 (fr) 2011-02-17 2012-08-22 Industrial Textiles & Plastics Limited Membrane résistant aux agents chimiques
EP2565032A1 (fr) * 2010-04-28 2013-03-06 Kuraray Co., Ltd. Processus de production de structure multicouche
EP3434469A1 (fr) * 2017-07-24 2019-01-30 QuinLyte Holding B.V. Ensemble de film stratifié multicouche et poche verticale
US11229095B2 (en) 2014-12-17 2022-01-18 Campbell Soup Company Electromagnetic wave food processing system and methods
US11512193B2 (en) 2020-01-06 2022-11-29 Inv Polypropylene, Llc Polymeric substrate including a barrier layer

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561920A (en) * 1984-02-08 1985-12-31 Norchem, Inc. Formerly Northern Petrochemical Company Biaxially oriented oxygen and moisture barrier film
EP0311293A2 (fr) * 1987-10-05 1989-04-12 Mobil Oil Corporation Feuilles barrière multicouche biaxialement orientées
EP0341044A2 (fr) * 1988-05-06 1989-11-08 Ajinomoto Co., Inc. Récipient en matière plastique et procédé de fabrication
EP0530549A1 (fr) * 1991-08-23 1993-03-10 Wolff Walsrode Aktiengesellschaft Feuille tubulaire étirée biaxialement et coextrudée contenant au moins 3 couches, la couche intérieure se composant de polyamide
EP0974452A2 (fr) * 1998-07-24 2000-01-26 Kureha Kagaku Kogyo Kabushiki Kaisha Pellicule d'emballage étirée à plusieurs couches et procédé pour sa fabrication
EP0990513A1 (fr) * 1998-09-28 2000-04-05 Kuraray Co., Ltd. Film barrière multicouche orienté
WO2000018580A1 (fr) * 1998-09-30 2000-04-06 Cryovac, Inc. Barquette en polyester munie d'un film d'operculage multicouches comportant une couche de scellement en copolyester modifie en glycol
EP1059163A2 (fr) * 1999-06-11 2000-12-13 Kuraray Co., Ltd. Structure multicouche
DE10054672A1 (de) * 2000-11-04 2002-05-08 Convenience Food Sys Bv Transparente siegelbare Mehrschichtfolie
EP1391295A1 (fr) * 2002-08-20 2004-02-25 Curwood, Inc. Feuille d'emballage, emballage et procédé d'emballage asceptique
WO2004050353A2 (fr) * 2002-11-29 2004-06-17 Treofan Germany Gmbh & Co. Kg Feuille a orientation biaxiale presentant une couche de copolymere ethylene/alcool vinylique (evoh)

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561920A (en) * 1984-02-08 1985-12-31 Norchem, Inc. Formerly Northern Petrochemical Company Biaxially oriented oxygen and moisture barrier film
EP0311293A2 (fr) * 1987-10-05 1989-04-12 Mobil Oil Corporation Feuilles barrière multicouche biaxialement orientées
EP0341044A2 (fr) * 1988-05-06 1989-11-08 Ajinomoto Co., Inc. Récipient en matière plastique et procédé de fabrication
EP0530549A1 (fr) * 1991-08-23 1993-03-10 Wolff Walsrode Aktiengesellschaft Feuille tubulaire étirée biaxialement et coextrudée contenant au moins 3 couches, la couche intérieure se composant de polyamide
EP0974452A2 (fr) * 1998-07-24 2000-01-26 Kureha Kagaku Kogyo Kabushiki Kaisha Pellicule d'emballage étirée à plusieurs couches et procédé pour sa fabrication
EP0990513A1 (fr) * 1998-09-28 2000-04-05 Kuraray Co., Ltd. Film barrière multicouche orienté
WO2000018580A1 (fr) * 1998-09-30 2000-04-06 Cryovac, Inc. Barquette en polyester munie d'un film d'operculage multicouches comportant une couche de scellement en copolyester modifie en glycol
EP1059163A2 (fr) * 1999-06-11 2000-12-13 Kuraray Co., Ltd. Structure multicouche
DE10054672A1 (de) * 2000-11-04 2002-05-08 Convenience Food Sys Bv Transparente siegelbare Mehrschichtfolie
EP1391295A1 (fr) * 2002-08-20 2004-02-25 Curwood, Inc. Feuille d'emballage, emballage et procédé d'emballage asceptique
WO2004050353A2 (fr) * 2002-11-29 2004-06-17 Treofan Germany Gmbh & Co. Kg Feuille a orientation biaxiale presentant une couche de copolymere ethylene/alcool vinylique (evoh)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2565032A1 (fr) * 2010-04-28 2013-03-06 Kuraray Co., Ltd. Processus de production de structure multicouche
EP2565032A4 (fr) * 2010-04-28 2013-09-04 Kuraray Co Processus de production de structure multicouche
US9457545B2 (en) 2010-04-28 2016-10-04 Kuraray Co., Ltd. Process for production of multilayered structure
EP2489509A1 (fr) 2011-02-17 2012-08-22 Industrial Textiles & Plastics Limited Membrane résistant aux agents chimiques
US11229095B2 (en) 2014-12-17 2022-01-18 Campbell Soup Company Electromagnetic wave food processing system and methods
EP3434469A1 (fr) * 2017-07-24 2019-01-30 QuinLyte Holding B.V. Ensemble de film stratifié multicouche et poche verticale
NL2019329B1 (en) * 2017-07-24 2019-02-18 Quinlyte Holding B V Multilayer laminate film assembly and standing pouch
US11312113B2 (en) 2017-07-24 2022-04-26 Quinlyte Holding B.V. Multilayer laminate film assembly and standing pouch
US11512193B2 (en) 2020-01-06 2022-11-29 Inv Polypropylene, Llc Polymeric substrate including a barrier layer
US11781000B2 (en) 2020-01-06 2023-10-10 Inv Polypropylene, Llc Polymeric substrate including a barrier layer

Also Published As

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