EP2014478A2 - Processus d'impression de mots et/ou graphiques sur un stratifié multicouches pour des récipients contenant des produits versables - Google Patents

Processus d'impression de mots et/ou graphiques sur un stratifié multicouches pour des récipients contenant des produits versables Download PDF

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Publication number
EP2014478A2
EP2014478A2 EP08002446A EP08002446A EP2014478A2 EP 2014478 A2 EP2014478 A2 EP 2014478A2 EP 08002446 A EP08002446 A EP 08002446A EP 08002446 A EP08002446 A EP 08002446A EP 2014478 A2 EP2014478 A2 EP 2014478A2
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EP
European Patent Office
Prior art keywords
multilayer laminate
layer made
film
face
layer
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Withdrawn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
EP08002446A
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German (de)
English (en)
Other versions
EP2014478A3 (fr
Inventor
Pierluigi Locchi
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.)
Ipi SRL
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Ipi SRL
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Filing date
Publication date
Application filed by Ipi SRL filed Critical Ipi SRL
Publication of EP2014478A2 publication Critical patent/EP2014478A2/fr
Publication of EP2014478A3 publication Critical patent/EP2014478A3/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0041—Digital printing on surfaces other than ordinary paper
    • B41M5/0058—Digital printing on surfaces other than ordinary paper on metals and oxidised metal surfaces

Definitions

  • the present invention relates to a process for printing words and/or graphics on a multilayer laminate for containers of pourable products and the multilayer laminate obtained directly with this process.
  • containers for pourable products of the disposable, or re-closable, type have been available on the market, such as containers for the sale of pourable foods such as milk, water, fruit juices, syrups, beverages, sauces, creams, yoghurts, etc., or for the sale of chemical products, such as lubricating oils, paints, solvents, fertilizers, etc., in shops, in supermarkets and, in general in the large-scale retail channel.
  • Some of the aforesaid containers are made of multilayer laminate, i.e. in sheets formed of layers of different materials, such as paper, card or cardboard, aluminium, polyethylene, etc., laminated together.
  • the portion of multilayer laminate intended to come into contact with the foods, or with chemical products of the aforesaid type, is in conformity with the current standards of safety and compatibility required for food/chemical packaging.
  • a typical multilayer laminate used for packaging foods i.e. to produce food containers, such as milk cartons
  • a typical multilayer laminate used for packaging foods i.e. to produce food containers, such as milk cartons
  • Two polyethylene films enclose the aluminium and the paperboard in a sandwich structure.
  • the words, graphics, logos, etc., intended to be visible on the inner surface of the container are obtained by depositing printing inks directly on the inner polyethylene film, i.e. the film intended to come into contact with the food.
  • inks are deposited on the surface of said film not in contact with the food, i.e. the surface of the polyethylene film that remains in direct contact with the aluminium layer (or film).
  • Another multilayer laminate conventionally used for food packaging comprises a layer of card or paperboard enclosed between two transparent films, generally made of polyethylene. Also in this configuration the inks are applied directly to the inner film, as in the previous case.
  • the European patent application EP 0468864 describes a conventional printed multilayer laminate, and the relative production process.
  • the multilayer laminate comprises a polyester film having one face coated with a protective paint, i.e. a transparent nitrocellulose paint.
  • a first layer of printing ink is interposed between the polyester and the protective paint.
  • the inks are deposited on the polyester film using heliographic or flexographic printing techniques.
  • a metal film, i.e. made of aluminium, is laminated to the polyester film, over the protective paint.
  • a second layer of printing inks, in tum coated with the relative layer of protective paint, is provided on the face of the metal film opposite the one in contact with the protective paint of the first layer of inks.
  • the first layer of inks is visible on one face of the multilayer laminate and the second layer of inks is visible on the opposite face.
  • Cartons and containers produced with the multilayer laminate according to EP 0468864 have words visible both on the inside and on the outside.
  • the patent application GB 2231322 describes a multilayer laminate for foods, in particular a rigid multilayer laminate for vacuum packaging slices of fish (salmon, trout).
  • the multilayer laminate comprises a laminar rigid support, made of expanded polystyrene foam, and two plates made of a food grade material, such as paperboard.
  • the plates are each bonded to a face of the rigid support, to form a multilayer laminate, and are coated externally with a transparent polyethylene film intended to come into contact with the food to be packaged.
  • the visible side of one of the plates, or of both the plates, is printed with words, decorations or graphics.
  • the transparent polyethylene film protects the printed side.
  • the Italian patent IT 1323482 relates to a food container made of card, or equivalent materials.
  • the container is provided with an insert, provided on the inside thereof, constituted by a first polyethylene film and a second polyethylene terephthalate (or PET) film.
  • a distinguishing mark, or graphics or words etc. are applied to the first polyethylene film, in particular to the side intended to face toward the inside of the container, i.e. toward the food.
  • the second PET film is laminated to the first film and has the dual function of protecting the signs, graphics and words present on the first film and being interposed between these and the food, remaining in contact with the latter.
  • the insert is laminated to the container, at one of the internal surfaces thereof, by heat-seating.
  • Multilayer films provided with words, graphics, logos, patterns etc, on both sides, i.e. visible on both faces of the multilayer laminate in any case require inks to be applied to the transparent "inner" film.
  • inks to be applied to the transparent "inner" film.
  • the object of the present invention is to provide a process for printing words, logos, graphics, etc., visible on the "inner" side of a multilayer laminate for packaging pourable products, which solves the drawbacks of conventional solutions in a simple and efficient manner, and which is also advantageous from the viewpoint of cost.
  • the process comprises the step to deposit ink, or inks of different type, on at least one layer of the multilayer laminate, which is intended to produce containers for food and non-food products, and is provided with at least one layer made of metal material and/or at least one layer made of paper material.
  • the ink, or inks are deposited directly on the inner face of the layer made of metal material, or on the inner face of the layer made of paper material, that is, the face of the relative layer intended to face the inside of the container formed with the multilayer laminate.
  • inks are not applied to the polyethylene or polyester layers, but directly to the layer made of metal material or to the layer made of paper material, and in particular on the side of the metal/paper layer intended to face the inside of the container.
  • the layer made of metal material comprises at least one aluminium film and the layer made of paper material is a sheet of card or paperboard.
  • Ink is applied in the step to produce the multilayer laminate, for example using inkjet printing techniques.
  • the inks are applied or deposited on the layer made of metal material, i.e. on the aluminium film, before lamination thereof to the corresponding transparent protective film (when the aluminium film has already been laminated to a layer or paperboard) or before lamination to other layers of the multilayer laminate, such as layers of paperboard and polyethylene films.
  • inkjet printing is performed directly on me sheet of paper material, before lamination thereof to the transparent inner film
  • the present invention also relates to a multilayer laminate to produce a container for pourable food and non-food products, characterized according to Claim 5.
  • the multilayer laminate comprises at least one layer made of metal material and/or at least one layer made of paper material.
  • the metal layer and the paper layer have an inner face, intended to face the inside of the relative container when finished (i.e. when ready for use), and an outer face, intended to face the outside of said container.
  • the ink or inks are applied/deposited directly to the inner face of the metal layer or to the inner face of the paper layer, i.e. to the inner side of the aluminium film or to the inner layer of the paperboard layer, to define words and/or graphics.
  • the words, logos, graphics, etc. are protected by at least one transparent film, laminated to the aluminium film, which isolates the inks and the aluminium from the pourable product present in the container when ready for use.
  • the pourable product can be a food product, such as milk, water, fruit juice, a beverage, tomato purée, yoghurt, cream, etc., or can be a non-food product, such as lubricating oil, paint, thinner, detergent, etc..
  • a typical multilayer laminate for use in the food sector comprises an aluminium film laminated to a layer of card, both enclosed in a sandwich structure by two transparent polyethylene films.
  • the polyethylene film present on the "inner" face of the multilayer laminate guarantees compatibility with the packaged foods.
  • the inks used to produce words and/or graphics on the multilayer laminate, visible inside the pack of food are applied directly to the aluminium film, in particular to the relative inner side, and not to the transparent polyethylene film.
  • inks are applied with the inkjet printing technique to the sheet made of paper material, for example paperboard or card.
  • words and/or graphics visible inside multilayer containers were obtained by applying inks to transparent films made of polyethylene or similar materials, in any case subject to breakage during the printing step.
  • Inkjet printing on metal films or on paperboard sheets implies minimum risks of breakage of the film during treatment with print rollers or heads, with evident advantages with regard to production economy, and increased precision in the application of inks, to the advantage of the quality of the multilayer laminate product.
  • Figure 1A shows a sectional view of a conventional multilayer laminate M1 for application in the food packaging sector, for example to manufacture containers for pourable food products.
  • Figure 1A shows the multilayer laminate M1 in a partly assembled configuration.
  • the multilayer laminate comprises a first layer of paperboard 1', which during the production step is laminated to a transparent polyethylene film 2', intended to form the outer surface of the relative containers.
  • the paperboard layer is laminated to an aluminium film 3'.
  • the "outer" face of the aluminium film 3' is laminated directly to the paperboard, on the opposite side with respect to the outer polyethylene film 2'.
  • the layers 1', 2' and 3' form a sandwich structure with the paperboard 1' interposed between the outer film 2' and the aluminium 3'.
  • This sandwich structure is normally laminated to a second polyethylene film 4' intended to come into direct contact with the packaged food product,
  • the second polyethylene film 4' definable as "inner” transparent film, is therefore intended to face the inside of the container.
  • the film 4' is laminated directly to the "inner" face of the aluminium film 3'.
  • Figure 1B shows the multilayer laminate M1 according to prior art, in the assembled configuration, i.e. ready to be used to manufacture containers for food products.
  • the container produced with the multilayer laminate M1 is to have words and/or graphics visible on an inner surface thereof, such as advertising or marketing messages relative to prize contests
  • these words and/or graphics are obtained by depositing inks on the second polyethylene film 4'.
  • the inks are applied to the upper surface 41' of the second film 4', i.e. to the side of the film 4' in contact with the aluminium layer 3'. In this way the inks do not come into direct contact with the packaged food and are protected by the transparent film 4', at the same time remaining visible on the surface of the multilayer laminate M1.
  • the inks are applied to the surface of the second polyethylene film 4' before lamination thereof to the aluminium film 3'.
  • the application of inks to the polyethylene film 4', or equivalently to the transparent polyester films, etc.. is subject to various drawbacks.
  • transparent films made of polyethylene, polyester, etc. break easily during the printing process, with evident delays for production and consequent increases in costs.
  • the poor mechanical characteristics of these films have a negative effect on the printing precision, i.e. the quality of the printed words and/or graphics.
  • the present invention relates to a process for printing a multilayer laminate M, and the relative multilayer laminate M, which solves the aforesaid problems of prior art.
  • this shows a container 5 for pourable products, for example food products such as milk, water, fruit juices, yoghurt, etc., having one side 6 provided with a transparent portion 61 through which it is possible to view the inner surface 42 of said container 5. Words and/or graphics 7 are visible on this surface.
  • the container 5 can, for example, also be used for packaging non-food products, such as lubricant oils, detergents, etc..
  • Figure 3 shows a sectional view of a multilayer laminate M according to the present invention, comprising at least one layer made of metal material 3.
  • the layer made of metal material 3 is preferably an aluminium film intended to be laminated to other layers.
  • the nature, number and thickness of each layer of the multilayer laminate M depends on the final use for which the container 5 is intended, as is moreover known in the art.
  • the multilayer laminate M is intended for packaging food products and therefore, in the same manner as the multilayer laminate M1, it comprises a layer of paperboard 1, laminated on top of the aluminium film 3, and an outer polyethylene layer 2 covering the paperboard layer 1.
  • the transparent polyethylene outer layer 2 is the outermost layer of the multilayer laminate M forming the container 5, i.e. constituting the "skin" of the container 5.
  • the “inner” face of the metal film 3 is indicated with the reference number 31 and represents the side of the film 3 which in the container 5, when ready for use, faces the inside- A transparent protective film 4, for example made of polyethylene or an equivalent material compatible with the packaged product, is laminated directly to this face.
  • the surface 42 of the film 4, i.e. the "inner" side of the multilayer laminate M is in direct contact with the packaged product.
  • the outer face 32 of the film 3 is laminated directly to the paperboard 1 ( Figure 3 ).
  • the inks used to define the words and/or graphics 7 are deposited on (applied to) the inner surface 31 of the metal film 3 and not on the corresponding transparent protective film 4.
  • the ink or inks are applied to the metal film 3 during production of the multilayer laminate M, before said metal film 3 is laminated to the other layers, or when the film 3 is already laminated to the paperboard 1, but in any case before application of the transparent film 4.
  • Application of the ink to impress words and/or graphics, logos, patterns 7 is preferably performed using inkjet printing processes, known per se.
  • the type of inks used is also known in the art.
  • the multilayer laminate M is completed when the ink deposited on the inner face 31 of the metal film 3 is protected by applying the transparent film 42. It is evident to those skilled in the art that the ink applied is visible on the inner surface 42 of the container 5, i.e. through the inner film 4.
  • FIG 4 shows a second embodiment of the multilayer laminate M' according to the present invention.
  • the multilayer laminate M' comprises the layer of paperboard material 1, but not the metal layer.
  • the layer of paperboard material is, for example, a sheet of paperboard or card 1.
  • the layer 1 is intended, during production of the multilayer laminate M', to be enclosed between two films 2, 4, preferable transparent.
  • the films 2 and 4 can be made of polyethylene, polyester, etc.
  • Inkjet printing is performed on the inner face 11 of the sheet 1, i.e. the face intended to face the inside of the package 5, before the transparent film 42 is laminated to the sheet 1 (which may or may not be already constrained to the film 2).
  • the inner face 11 of the layer 1 is visible through the window 61 of the relative package, in the same manner as the face 31 of the multilayer laminate M shown in figure 3 .
  • the layers of multilayer laminate M or M' can be laminated to one another in the conventional manner, i.e. by bonding, heat-sealing, etc..
  • the print quality, in terms of definition and sharpness of the words and/or graphics 7 obtained on the surface 31 or on the surface 11, is better than the quality obtainable with printing on plastic films.
  • the multilayer laminate M according to the present invention ensures a better quality of words and/or graphics 7 readable on the inner wall of the container 5 and simplifies production with respect to conventional solutions, with evident economic advantages.

Landscapes

  • Laminated Bodies (AREA)
  • Wrappers (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Preparing Plates And Mask In Photomechanical Process (AREA)
EP08002446A 2007-07-13 2008-02-11 Processus d'impression de mots et/ou graphiques sur un stratifié multicouches pour des récipients contenant des produits versables Withdrawn EP2014478A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT001404A ITMI20071404A1 (it) 2007-07-13 2007-07-13 Procedimento per la stampa di scritte e-o grafiche su un multistrato per contenitori di prodotti versatili

Publications (2)

Publication Number Publication Date
EP2014478A2 true EP2014478A2 (fr) 2009-01-14
EP2014478A3 EP2014478A3 (fr) 2009-11-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08002446A Withdrawn EP2014478A3 (fr) 2007-07-13 2008-02-11 Processus d'impression de mots et/ou graphiques sur un stratifié multicouches pour des récipients contenant des produits versables

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EP (1) EP2014478A3 (fr)
IT (1) ITMI20071404A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2231322A (en) 1989-05-10 1990-11-14 Neil Bass A packaging structure
EP0468864A1 (fr) 1990-07-25 1992-01-29 Venthenat Papeteries Des Charentes S.A. Film d'emballage complexé imprimé, procédé de réalisation d'un tel film, opercule mettant en oeuvre un tel film et conteneur comportant un tel opercule
IT1323482B1 (it) 2001-09-28 2004-09-10 Ariete Fattoria Latte Sano S P Contenitore in cartone o simili, per alimenti, con inserto interno infilm poliaccoppiato, e procedimento per l'accoppiamento di detto inser

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5037682A (en) * 1987-03-09 1991-08-06 James River Paper Company, Inc. Decorative printed packaging material and a process for producing the same
US5333549A (en) * 1992-09-14 1994-08-02 Playoff Corporation Method for producing printed images on foil-covered surfaces
ES2175474T3 (es) * 1996-10-24 2002-11-16 Contra Vision Ltd Metodo para formar imagenes duraderas sobre sustratos.
DE19753266B4 (de) * 1997-12-01 2010-10-07 H.B. Fuller Licensing & Financing, Inc., St. Paul Verfahren zum Verbinden luftundurchlässiger Materialien
US8252409B2 (en) * 2004-02-19 2012-08-28 Hewlett-Packard Development Company, L.P. Durable printed composite materials and associated methods
EP1762380A3 (fr) * 2004-04-15 2010-10-13 Sihl GmbH Nouveaux laminés
CN101184629B (zh) * 2005-06-02 2012-07-11 爱克发印艺公司 用于产品或产品包装的喷墨认证标志

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2231322A (en) 1989-05-10 1990-11-14 Neil Bass A packaging structure
EP0468864A1 (fr) 1990-07-25 1992-01-29 Venthenat Papeteries Des Charentes S.A. Film d'emballage complexé imprimé, procédé de réalisation d'un tel film, opercule mettant en oeuvre un tel film et conteneur comportant un tel opercule
IT1323482B1 (it) 2001-09-28 2004-09-10 Ariete Fattoria Latte Sano S P Contenitore in cartone o simili, per alimenti, con inserto interno infilm poliaccoppiato, e procedimento per l'accoppiamento di detto inser

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Publication number Publication date
EP2014478A3 (fr) 2009-11-25
ITMI20071404A1 (it) 2009-01-14

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