EP2512937B1 - Can-shaped container having a protective inner layer - Google Patents

Can-shaped container having a protective inner layer Download PDF

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Publication number
EP2512937B1
EP2512937B1 EP10807603.5A EP10807603A EP2512937B1 EP 2512937 B1 EP2512937 B1 EP 2512937B1 EP 10807603 A EP10807603 A EP 10807603A EP 2512937 B1 EP2512937 B1 EP 2512937B1
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EP
European Patent Office
Prior art keywords
protective layer
pores
tin
container
protective
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.)
Not-in-force
Application number
EP10807603.5A
Other languages
German (de)
French (fr)
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EP2512937A1 (en
Inventor
Alain Le Talludec
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.)
Trivium Packaging Group Netherlands BV
Original Assignee
Ardagh MP Group Netherlands BV
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Filing date
Publication date
Application filed by Ardagh MP Group Netherlands BV filed Critical Ardagh MP Group Netherlands BV
Priority to EP16151810.5A priority Critical patent/EP3025977B1/en
Publication of EP2512937A1 publication Critical patent/EP2512937A1/en
Application granted granted Critical
Publication of EP2512937B1 publication Critical patent/EP2512937B1/en
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Anticipated expiration legal-status Critical

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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
    • B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
    • B65D25/14—Linings or internal coatings
    • 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
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/22—Boxes or like containers with side walls of substantial depth for enclosing contents
    • B65D1/26—Thin-walled containers, e.g. formed by deep-drawing operations
    • B65D1/28—Thin-walled containers, e.g. formed by deep-drawing operations formed of laminated material
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D

Definitions

  • the present invention relates to a container of the kind can, for receiving a product to be packaged, the inner surface is at least partially made of tin coated with a protective layer.
  • Certain foodstuffs such as fruit or products containing tomato, are advantageously packaged in cans containing a can body whose inner surface is made at least partially of tin.
  • the product takes a certain amount of tin on the inner surface of the can body, which ensures the preservation of its organoleptic and visual properties by a limitation, or even a suppression, of oxidation phenomena.
  • Such canisters partially partially painted internally are for example described in the documents EP-0 492 870 or EP-0 688 615 .
  • the box body comprising a bottom element which is extended by a side wall whose upper edge delimits an upper opening intended to receive a shutter element, is made from a shaped tin plate by a stamping operation.
  • the body of this can consists of a single varnished cylindrical surface, which extends continuously and uniformly over a portion of the height of the inner surface of its side wall, from its upper edge.
  • the remaining cylindrical portion of the height of this side wall (here on the side of its bottom element) constitutes an exposed area of the inner surface of tin (devoid of protective layer).
  • the aforementioned type of box, partially painted, is not completely satisfactory in that the inner surface of its side wall has a contrast with two different color zones, which are unsightly (the upper varnished , rather clear, and the other lower devoid of varnish, darker).
  • the Applicant has developed a new container of the type can, particularly suitable for packaging foodstuffs, whose inner surface of tin is coated with a protective layer which is adapted to limit or even eliminate the aesthetic impact of the chemical reaction of the product on the exposed tin, while allowing optimum arrangement of the tin to preserve the qualitative characteristics of the packaged foodstuff. More generally, such a container can be used for the packaging of any product for which it would be interesting to take tin directly on the can body.
  • a container comprising all the technical features of the preamble of claim 1 is known from the document EP2 082 968 .
  • This particular tin can thus divides the exposed tin inner surface (accessible through the pores) into a plurality or multiplicity of distinct areas; this allows the desired exposed tinned surface to be distributed over a larger portion of the inner packaging surface, and thus to limit the visual impact resulting from the chemical reaction between the tin and the packaged product.
  • the invention also relates to a process for the manufacture of the container presented above, this process being defined by the appended claim 10, this process comprising, before the step of filling with the product to be packaged, a step for obtaining protective layer comprising, distributed over at least a portion of its surface, a plurality of pores through each of which an area facing the inner surface of tin is accessible from the container interior volume.
  • the protective layer consists of a protective varnish which is applied to the inner surface of tin so as to obtain the protective layer comprising the access pores to said tin-plated inner surface.
  • This layer of protective varnish is advantageously applied (i) to a metal part intended to be shaped to form at least a part of the box body and / or (ii) on a metal part already shaped.
  • the protective varnish applied advantageously consists of an emulsion or dispersion comprising (i) the protective varnish itself and (ii) a fluid dispersed in said varnish and which is capable of being removed after the application operation on the body of box so as to form the pores.
  • the fluid dispersed in the varnish consists for example of a liquid intended to be removed by natural or active evaporation.
  • the container according to the invention as represented on the Figures 1 and 2 here consists of a can, for the packaging of a foodstuff for example (not shown).
  • This container comprises a can body 1 composed of a bottom member 2 whose periphery is extended upwards by a side wall 3 (preferably in one or two rooms).
  • the side wall 3 is preferably devoid of moldings, or mostly devoid of such moldings.
  • the upper edge 4 of the side wall 2 delimits an upper opening 5 through which the foodstuff to be conditioned is brought.
  • This upper edge 4 is intended to receive a shutter member (not shown), which may be chosen by those skilled in the art (for example a peelable membrane or a metal disc with rupture initiation line).
  • This can body 1 defines an interior volume 6 for the packaging of the product of interest (for example a food product based on tomato or fruit).
  • the product of interest for example a food product based on tomato or fruit.
  • the bottom element 2 and the side wall 3 of the can body 1 can be made in one piece (for example by stamping). These two parts 2, 3 can also be manufactured independently of one another and then secured together by any suitable operation (for example by crimping or welding).
  • the bottom element 2 and the side wall 3 of this box body 1 are advantageously made of a steel matrix. Moreover, as illustrated by the figure 2 at least a part of the inner surface 7 of this can body 1 (oriented towards the inner volume side 6), and preferably at least the inner surface 3a of its side wall 3, is made of tin coating and / or a tin-based alloy. The bottom element 2 may or may not be coated with such a layer of tin.
  • the inner surface of tin 7 is itself coated with an inner protective layer 10 which is made of a product resistant to the chemical action of the product to be packaged.
  • the protective layer 10 of the surface tinned 7 comprises, distributed over at least part of its surface, a plurality of pores 11 through each of which a facing 7 in area of the inner surface 7 of tin is accessible from the interior volume of container 6.
  • the bottom element 2 is itself coated here with a continuous protective layer; alternatively, this element 2 may be (i) devoid of protection, (ii) partially protected or (iii) provided with a protective layer 10 also provided with pores 11 (in particular if the bottom element 2 also comprises an inner surface of tin 7).
  • This multi-pore protective layer 10, 11 allows the contacting zones 7 a of the inner tin underlying surface 7 with the packaged product, so as to deliver a certain amount of tin in the product by oxidation-reduction chemical reaction.
  • This particular distribution of exposed tin zones 7 has the advantage of limiting their aesthetic impact (blackening, darkening due to oxidation by the foodstuff), but also possibly ensuring a delivery of tin well distributed on the the height of the packaged foodstuff (to allow at least approximately uniform distribution of the tin).
  • the pores 11 of the protective layer 10 are advantageously uniformly distributed, or at least approximately uniformly, over the entire inner surface of tin 7.
  • these pores 11 of the protective layer 10 can be distributed and / or grouped only on the side wall 3: over its entire height or only a portion of the height of this side wall 3, for example in the width one or more annular bands.
  • these pores 11 are then advantageously arranged at a distance from the upper edge 4 and below the surface level of the products packaged in this body. box 1; an upper band of the side wall 3 provided with a uniform protective layer 10 and free of such pores 11 is thus obtained, which is particularly useful for preventing any negative visual appearance of the protective layer 10.
  • these pores 11 may be distributed and arranged randomly, or non-randomly (that is to say in a predetermined manner and predetermined to form, together, a particular pattern and / or regular).
  • the pores 11 advantageously have a maximum dimension d greater than 0.1 ⁇ m, and preferably less than 5 mm; these pores 11 preferably have a maximum dimension d of between 10 ⁇ m and 2.5 mm.
  • the pores 11 each have an area of between 100 ⁇ m 2 and 9 mm 2 .
  • dimension of a pore is meant preferably the largest dimension of this pore 11, as illustrated by the dimensional dimension d on the figure 2 .
  • These pores 11 may have a regular contour, or at least approximately regular, for example of generally circular or oval shape as shown in FIG. figure 2 .
  • this contour may also be irregular.
  • the pores 11 advantageously together represent an area of between 10% and 70% (preferably between 17% and 50%) of the inner surface of the box body 1, preferably of the inner surface of the side wall 3 and more preferably the inner surface of tin 7.
  • the protective layer 10 advantageously consists of a layer of varnish, the composition and thickness of which are chosen by those skilled in the art depending on the conditioned foodstuff.
  • This protective varnish is preferably chosen from polyester and epoxy acrylate. It can be applied in liquid or powder form.
  • Its thickness is advantageously between 2 microns and 80 microns, and more preferably between 4 microns and 30 microns.
  • the multi-porous protective varnish layer 10, 11 can be obtained by means of a process comprising, before the step of filling with the product to be packaged, a step of applying the protective varnish to the inner surface of the tin 7 so as to obtain directly said protective layer 10 provided with pores 11.
  • the protective varnish applied consists for example of an emulsion or dispersion comprising (i) the protective varnish itself and (ii) a fluid (gas or liquid) dispersed in this varnish and which is suitable to be removed after the application operation on the can body 1 so as to form the pores 11 (in practice, this dispersed fluid is preferably immiscible or poorly miscible with the protective varnish).
  • this liquid is intended to be removed by natural or active evaporation.
  • the liquid removed consists for example of water.
  • the protective varnish may be applied by means of a spray nozzle, a brush, a sponge and / or a roller, these application means being suitably controlled so as to obtain the special protective layer as described above.
  • the protective layer 10 consists of a film integral with the inner surface of the can body 1 and matching the latter.
  • This protective film 10 is chosen with an elongation resistance which is lower than that of the metallic material constituting said box body 1.
  • This protective film 10 advantageously consists of a material of polyethylene terephthalate or polypropylene type.
  • This protective film 10 may also consist of a layer of varnish having a reduced thickness, for example of the order of 1 to 4 microns, preferably 1 to 2 microns (or any other type of adapted coating), torn at the forming so as to generate the desired pores.
  • the one-piece box body 1 of the figure 1 can be obtained by carrying out a method comprising the steps detailed below, before the step of filling the product.
  • a metal part is manufactured, the shaping of which will make it possible to constitute the can body 1.
  • This metal part is covered with the bonded laminated film 10 (or the relatively fine protective lacquer layer), intact or intact. which is intended to form the protective layer and which has a resistance to elongation lower than that of the metallic material constituting the metal part.
  • this assembly is shaped, for example by stamping, to form the box body 1.
  • This forming operation generates a partial and local tearing of the protective film 10, because of the elongation of the workpiece 1 under conditions that are greater than the resistance to elongation of the laminated film 10.
  • This operation of Stretching thus creates a set of pores, cracks or tears 11 acting as free passages to the underlying tin.
  • the container can be filled with the product to be packaged, and the filling opening 5 can then be closed with a second bottom element reported. .
  • the side wall 3 is of generally cylindrical tubular shape; it could alternatively have any other configuration and desired section: it could have for example a radial section oval, rectangular or square, oblong, etc. Similarly, it may have on its height a set of ribs or grooves, dents, necking, etc.
  • the container according to the invention has an inner surface which is partially protected.
  • the free zones 7 a of the inner surface of tin 7 are arranged to limit the visual impact of the chemical reaction with the packaged product.
  • the exposed tin zones are distributed 7 has here the height of the side wall 3, which allows a better distribution of tin into the packed product.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Packages (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Buffer Packaging (AREA)
  • Tires In General (AREA)
  • Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)

Description

La présente invention concerne un contenant du genre boîte de conserve, destiné à recevoir un produit à conditionner, dont la surface intérieure est constituée au moins partiellement d'étain revêtu d'une couche de protection.The present invention relates to a container of the kind can, for receiving a product to be packaged, the inner surface is at least partially made of tin coated with a protective layer.

Certaines denrées alimentaires, telles que les fruits ou les produits contenant de la tomate, sont avantageusement conditionnées dans des boîtes de conserves comprenant un corps de boîte dont la surface intérieure est constituée au moins partiellement d'étain.Certain foodstuffs, such as fruit or products containing tomato, are advantageously packaged in cans containing a can body whose inner surface is made at least partially of tin.

En effet, ainsi conditionné, le produit prélève une certaine quantité d'étain sur la surface intérieure du corps de boîte, ce qui assure la préservation de ses propriétés organoleptiques et visuelles par une limitation, voire une suppression, des phénomènes d'oxydation.Indeed, thus conditioned, the product takes a certain amount of tin on the inner surface of the can body, which ensures the preservation of its organoleptic and visual properties by a limitation, or even a suppression, of oxidation phenomena.

Pour contrôler la quantité d'étain mise à disposition du produit conditionné, il est connu de revêtir partiellement la surface intérieure étamée du corps de boîte avec une couche de vernis de protection.To control the amount of tin made available of the packaged product, it is known to partially coat the tinned inner surface of the can body with a layer of protective varnish.

De telles boîtes de conserves partiellement vernies intérieurement sont par exemple décrites dans les documents EP-0 492 870 ou EP-0 688 615 .Such canisters partially partially painted internally are for example described in the documents EP-0 492 870 or EP-0 688 615 .

Dans ces documents, le corps de boîte, comprenant un élément de fond qui est prolongé par une paroi latérale dont la bordure supérieure délimite une ouverture supérieure destinée à recevoir un élément d'obturation, est réalisé à partir d'une plaque d'étain conformée par une opération d'emboutissage.In these documents, the box body, comprising a bottom element which is extended by a side wall whose upper edge delimits an upper opening intended to receive a shutter element, is made from a shaped tin plate by a stamping operation.

- Le corps de cette boîte de conserve comprend une unique surface cylindrique vernie, qui s'étend de manière continue et uniforme sur une partie de la hauteur de la surface intérieure de sa paroi latérale, à partir de sa bordure supérieure. La partie cylindrique restante de la hauteur de cette paroi latérale (ici du côté de son élément de fond) constitue une zone exposée de la surface intérieure d'étain (dépourvue de couche de protection).- The body of this can consists of a single varnished cylindrical surface, which extends continuously and uniformly over a portion of the height of the inner surface of its side wall, from its upper edge. The remaining cylindrical portion of the height of this side wall (here on the side of its bottom element) constitutes an exposed area of the inner surface of tin (devoid of protective layer).

Le prélèvement d'étain présente un intérêt certain pour le produit conditionné, mais le contact entre le produit et la surface étamée du corps de boîte entraîne une réaction de corrosion qui s'accompagne d'un léger phénomène d'assombrissement.The removal of tin is of some interest for the packaged product, but the contact between the product and the tinned surface of the can body causes a corrosion reaction which is accompanied by a slight darkening phenomenon.

Ainsi, le type de boîte précité, partiellement vernie, n'est pas totalement satisfaisant en ce sens que la surface intérieure de sa paroi latérale présente un contraste avec deux zones de couleurs différentes, qui s'avèrent peu esthétiques (l'une supérieure vernie, assez claire, et l'autre inférieure dépourvue de vernis, plus sombre).Thus, the aforementioned type of box, partially painted, is not completely satisfactory in that the inner surface of its side wall has a contrast with two different color zones, which are unsightly (the upper varnished , rather clear, and the other lower devoid of varnish, darker).

Au regard de cet inconvénient, la demanderesse a développé un nouveau contenant du genre boîte de conserve, particulièrement adapté pour le conditionnement de denrées alimentaires, dont la surface intérieure d'étain est revêtue d'une couche de protection qui est adaptée pour limiter, voire supprimer, l'impact esthétique de la réaction chimique du produit sur l'étain exposé, tout en permettant une mise à disposition optimale de l'étain pour préserver les caractéristiques qualitatives de la denrée alimentaire conditionnée.
Plus généralement, un tel contenant peut être utilisé pour le conditionnement de tout produit pour lequel il serait intéressant de prélever de l'étain directement sur le corps de boîte. Un contenant comprenant toutes les caractéristiques techniques du préambule de la revendication 1 est connu du document EP2 082 968 .In view of this drawback, the Applicant has developed a new container of the type can, particularly suitable for packaging foodstuffs, whose inner surface of tin is coated with a protective layer which is adapted to limit or even eliminate the aesthetic impact of the chemical reaction of the product on the exposed tin, while allowing optimum arrangement of the tin to preserve the qualitative characteristics of the packaged foodstuff.
More generally, such a container can be used for the packaging of any product for which it would be interesting to take tin directly on the can body. A container comprising all the technical features of the preamble of claim 1 is known from the document EP2 082 968 .

Pour cela, le contenant, selon l'invention, est defini par la revendication 1 annexée.For this, the container according to the invention is defined by the appended claim 1.

Cette boîte de conserve particulière permet ainsi de diviser la surface intérieure d'étain exposée (accessible au travers des pores) en une pluralité ou multiplicité de zones distinctes ; cela autorise la répartition de la surface étamée exposée souhaitée sur une partie plus importante de la surface interne de conditionnement, et donc de limiter l'impact visuel résultant de la réaction chimique entre l'étain et le produit conditionné.This particular tin can thus divides the exposed tin inner surface (accessible through the pores) into a plurality or multiplicity of distinct areas; this allows the desired exposed tinned surface to be distributed over a larger portion of the inner packaging surface, and thus to limit the visual impact resulting from the chemical reaction between the tin and the packaged product.

D'autres caractéristiques structurelles avantageuses, pouvant être prises indépendamment ou en combinaison, sont développées ci-dessous :

  • les pores de la couche de protection sont répartis uniformément, ou au moins approximativement uniformément, sur la surface intérieure d'étain ; ils peuvent de manière alternative être regroupés sur une partie de la surface intérieure d'étain, par exemple dans la largeur d'une bande située au niveau de la paroi latérale, située de préférence à distance de la bordure supérieure et en-dessous du niveau de surface des produits destinés à être conditionnés dans le corps de boîte de sorte à obtenir une bande supérieure de ladite paroi latérale munie d'une couche de protection uniforme et dépourvue de tels pores ;
  • les pores de la couche de protection sont ménagés aléatoirement ou non-aléatoirement, au niveau de tout ou partie de la couche de protection ;
  • les pores de la couche de protection ont une dimension maximale supérieure à 0,1 µm, et de préférence inférieure à 5 mm ;
  • les pores de la couche de protection représentent ensemble une surface comprise entre 10 % et 70%, et de préférence encore entre 17 % et 50 %, par rapport à la surface intérieure du corps de boîte ;
  • la couche de protection consiste en un vernis de protection, choisi par exemple parmi le polyester et l'époxy-acrylate, et comportant avantageusement une épaisseur comprise entre 2 et 80 µm (et de préférence entre 4 et 30 µm) ;
  • de manière alternative, cette couche de protection consiste en un film de protection, solidaire et épousant la surface intérieure du corps de boîte, lequel film de protection présente une résistance à l'allongement qui est inférieure à celle du matériau métallique constitutif dudit corps de boîte.
Other advantageous structural characteristics, which can be taken independently or in combination, are developed below:
  • the pores of the protective layer are distributed uniformly, or at least approximately uniformly, on the inner surface of tin; they may alternatively be grouped together on a part of the inner surface of tin, for example in the width of a strip located at the level of the side wall, preferably located at a distance from the upper edge and below the level surface products intended to be packaged in the can body so as to obtain an upper band of said side wall provided with a uniform protective layer and devoid of such pores;
  • the pores of the protective layer are formed randomly or non-randomly, at all or part of the protective layer;
  • the pores of the protective layer have a maximum dimension greater than 0.1 μm, and preferably less than 5 mm;
  • the pores of the protective layer together represent an area of between 10% and 70%, and more preferably between 17% and 50%, with respect to the inner surface of the can body;
  • the protective layer consists of a protective varnish, chosen for example from polyester and epoxy acrylate, and advantageously comprising a thickness of between 2 and 80 μm (and preferably between 4 and 30 μm);
  • alternatively, this protective layer consists of a protective film, integral and conforming to the inner surface of the can body, which protective film has an elongation resistance which is lower than that of the metallic material constituting said can body .

L'invention porte encore sur un procédé pour la fabrication du contenant présenté ci-dessus, ce procédé étant défini par la revendication 10 annexée, ce procédé comprenant, avant l'étape de remplissage avec le produit à conditionner, une étape pour l'obtention de la couche de protection comportant, répartis sur au moins une partie de sa surface, une pluralité de pores au travers de chacun desquels une zone en regard de la surface intérieure d'étain est accessible depuis le volume intérieur de contenant.The invention also relates to a process for the manufacture of the container presented above, this process being defined by the appended claim 10, this process comprising, before the step of filling with the product to be packaged, a step for obtaining protective layer comprising, distributed over at least a portion of its surface, a plurality of pores through each of which an area facing the inner surface of tin is accessible from the container interior volume.

Selon un mode de réalisation particulier, la couche de protection consiste en un vernis de protection qui est appliqué sur la surface intérieure d'étain de sorte à obtenir la couche de protection comportant les pores d'accès à ladite surface intérieure étamée.According to a particular embodiment, the protective layer consists of a protective varnish which is applied to the inner surface of tin so as to obtain the protective layer comprising the access pores to said tin-plated inner surface.

Cette couche de vernis de protection est avantageusement appliquée (i) sur une pièce métallique destinée à être mise en forme pour constituer au moins une partie du corps de boîte et/ou (ii) sur une pièce métallique déjà mise en forme.This layer of protective varnish is advantageously applied (i) to a metal part intended to be shaped to form at least a part of the box body and / or (ii) on a metal part already shaped.

Le vernis de protection appliqué consiste avantageusement en une émulsion ou une dispersion comprenant (i) le vernis de protection proprement dit et (ii) un fluide dispersé dans ledit vernis et qui est apte à être éliminé après l'opération d'application sur le corps de boîte de manière à former les pores.The protective varnish applied advantageously consists of an emulsion or dispersion comprising (i) the protective varnish itself and (ii) a fluid dispersed in said varnish and which is capable of being removed after the application operation on the body of box so as to form the pores.

Le fluide dispersé dans le vernis consiste par exemple en un liquide destiné à être éliminé par évaporation naturelle ou active.The fluid dispersed in the varnish consists for example of a liquid intended to be removed by natural or active evaporation.

Selon un autre mode de réalisation, le procédé comprend, avant l'étape de remplissage :

  • une étape de fourniture d'au moins une pièce métallique destinée à être mise en forme pour constituer au moins une partie du corps de boîte de contenant, ladite pièce métallique étant recouverte d'un film de protection (un film laminé ou une couche de vernis par exemple) destiné à constituer la couche de protection et présentant une résistance à l'allongement qui est inférieure à celle du matériau métallique constitutif de ladite pièce métallique, et
  • une étape de mise en forme de ladite pièce métallique pour constituer au moins une partie dudit corps de boîte de contenant, ladite opération de mise en forme générant un allongement de ladite pièce métallique qui forme les pores dans ledit film de protection par sa déchirure.
According to another embodiment, the method comprises, before the filling step:
  • a step of providing at least one metal part to be shaped to form at least a portion of the container box body, said metal part being covered with a protective film (a laminated film or a layer of varnish for example) intended to form the protective layer and having a resistance to elongation which is lower than that of the metallic material constituting said metal part, and
  • a step of shaping said metal part to constitute at least a part of said container box body, said forming operation generating an elongation of said metal piece which forms the pores in said protective film by its tearing.

L'invention sera encore illustrée, sans être aucunement limitée, par la description suivante d'un mode de réalisation particulier, donné uniquement à titre d'exemple, illustré par les dessins annexés dans lesquels :

  • la figure 1 est une vue générale et schématique d'un contenant selon l'invention, avec un plan de coupe vertical diamétral ;
  • la figure 2 est une vue agrandie du détail II de la figure 1, de sorte à montrer schématiquement la structure de la couche de protection revêtant le corps de contenant.
The invention will be further illustrated, without being limited in any way, by the following description of a particular embodiment, given solely by way of example, illustrated by the appended drawings in which:
  • the figure 1 is a general and schematic view of a container according to the invention, with a diametrical vertical cutting plane;
  • the figure 2 is an enlarged view of detail II of the figure 1 , so as to show schematically the structure of the protective layer coating the container body.

Le contenant selon l'invention, tel que représenté sur les figures 1 et 2, consiste ici en une boîte de conserve, pour le conditionnement d'une denrée alimentaire par exemple (non représentée).The container according to the invention, as represented on the Figures 1 and 2 here consists of a can, for the packaging of a foodstuff for example (not shown).

Ce contenant comprend un corps de boîte 1 composé d'un élément de fond 2 dont la périphérie est prolongée vers le haut par une paroi latérale 3 (de préférence en une ou deux pièces).This container comprises a can body 1 composed of a bottom member 2 whose periphery is extended upwards by a side wall 3 (preferably in one or two rooms).

La paroi latérale 3 est de préférence dépourvue de moulures, ou majoritairement dépourvue de telles moulures.The side wall 3 is preferably devoid of moldings, or mostly devoid of such moldings.

La bordure supérieure 4 de la paroi latérale 2 délimite une ouverture supérieure 5 au travers de laquelle est rapportée la denrée alimentaire à conditionner. Cette bordure supérieure 4 est destinée à recevoir un élément d'obturation (non représenté), pouvant être choisi par l'homme du métier (par exemple une membrane pelable ou un disque métallique avec ligne d'amorce de rupture).The upper edge 4 of the side wall 2 delimits an upper opening 5 through which the foodstuff to be conditioned is brought. This upper edge 4 is intended to receive a shutter member (not shown), which may be chosen by those skilled in the art (for example a peelable membrane or a metal disc with rupture initiation line).

Ce corps de boîte 1 délimite ainsi un volume intérieur 6 pour le conditionnement du produit d'intérêt (par exemple un produit alimentaire à base de tomate ou de fruits).This can body 1 defines an interior volume 6 for the packaging of the product of interest (for example a food product based on tomato or fruit).

L'élément de fond 2 et la paroi latérale 3 du corps de boîte 1 peuvent être réalisés monobloc (par exemple par emboutissage).
Ces deux parties 2, 3 peuvent également être fabriquées indépendamment l'une de l'autre, puis solidarisées ensemble par toute opération adaptée (par exemple par sertissage ou soudage).The bottom element 2 and the side wall 3 of the can body 1 can be made in one piece (for example by stamping).
These two parts 2, 3 can also be manufactured independently of one another and then secured together by any suitable operation (for example by crimping or welding).

L'élément de fond 2 et la paroi latérale 3 de ce corps de boîte 1 sont avantageusement réalisés dans une matrice d'acier.
De plus, tel qu'illustré par la figure 2, au moins une partie de la surface intérieure 7 de ce corps de boîte 1 (orientée du côté du volume intérieur 6), et de préférence au moins la surface intérieure 3a de sa paroi latérale 3, est constituée par revêtement d'étain et/ou d'un alliage à base d'étain.
L'élément de fond 2 peut être ou non revêtu d'une telle couche d'étain.The bottom element 2 and the side wall 3 of this box body 1 are advantageously made of a steel matrix.
Moreover, as illustrated by the figure 2 at least a part of the inner surface 7 of this can body 1 (oriented towards the inner volume side 6), and preferably at least the inner surface 3a of its side wall 3, is made of tin coating and / or a tin-based alloy.
The bottom element 2 may or may not be coated with such a layer of tin.

La surface intérieure d'étain 7 est elle-même revêtue d'une couche intérieure de protection 10 qui est réalisée dans un produit résistant à l'action chimique du produit à conditionner.The inner surface of tin 7 is itself coated with an inner protective layer 10 which is made of a product resistant to the chemical action of the product to be packaged.

La couche de protection 10 de la surface étamée 7 comporte, répartis sur au moins une partie de sa surface, une pluralité de pores 11 au travers de chacun desquels une zone en regard 7a de la surface intérieure d'étain 7 est accessible depuis le volume intérieur de contenant 6.
L'élément de fond 2 est quant à lui revêtu ici d'une couche de protection 10 continue ; de manière alternative, cet élément 2 peut être (i) dépourvu de protection, (ii) partiellement protégé ou (iii) pourvu d'une couche de protection 10 également munie de pores 11 (en particulier si l'élément de fond 2 comporte aussi une surface intérieure d'étain 7).The protective layer 10 of the surface tinned 7 comprises, distributed over at least part of its surface, a plurality of pores 11 through each of which a facing 7 in area of the inner surface 7 of tin is accessible from the interior volume of container 6.
The bottom element 2 is itself coated here with a continuous protective layer; alternatively, this element 2 may be (i) devoid of protection, (ii) partially protected or (iii) provided with a protective layer 10 also provided with pores 11 (in particular if the bottom element 2 also comprises an inner surface of tin 7).

Cette couche de protection multi-pores 10, 11 permet la mise en contact de zones 7a de la surface intérieure d'étain sous-jacente 7 avec le produit conditionné, de sorte à délivrer une certaine quantité d'étain au sein de ce produit par réaction chimique de type oxydo-réduction.
Cette distribution particulière des zones d'étain exposées 7a a pour intérêt de limiter leur impact esthétique (noircissements, assombrissements dus à l'oxydation par la denrée alimentaire), mais aussi éventuellement d'assurer une délivrance d'étain bien répartie sur l'ensemble de la hauteur de la denrée alimentaire conditionnée (pour permettre une distribution au moins approximativement homogène de l'étain).This multi-pore protective layer 10, 11 allows the contacting zones 7 a of the inner tin underlying surface 7 with the packaged product, so as to deliver a certain amount of tin in the product by oxidation-reduction chemical reaction.
This particular distribution of exposed tin zones 7 has the advantage of limiting their aesthetic impact (blackening, darkening due to oxidation by the foodstuff), but also possibly ensuring a delivery of tin well distributed on the the height of the packaged foodstuff (to allow at least approximately uniform distribution of the tin).

A cet effet, les pores 11 de la couche de protection 10 sont avantageusement répartis uniformément, ou au moins approximativement uniformément, sur l'ensemble de la surface intérieure d'étain 7.For this purpose, the pores 11 of the protective layer 10 are advantageously uniformly distributed, or at least approximately uniformly, over the entire inner surface of tin 7.

De manière alternative, ces pores 11 de la couche de protection 10 peuvent être répartis et/ou regroupés uniquement sur la paroi latérale 3 : sur toute sa hauteur ou sur une partie seulement de la hauteur de cette paroi latérale 3, par exemple dans la largeur d'une ou plusieurs bandes annulaires.Alternatively, these pores 11 of the protective layer 10 can be distributed and / or grouped only on the side wall 3: over its entire height or only a portion of the height of this side wall 3, for example in the width one or more annular bands.

Dans le cas d'une paroi latérale 3 avec des pores 11 sur une partie seulement de sa hauteur, ces pores 11 sont alors avantageusement ménagés à distance de la bordure supérieure 4 et en-dessous du niveau de surface des produits conditionnés dans ce corps de boîte 1 ; on obtient ainsi une bande supérieure de la paroi latérale 3 munie d'une couche de protection 10 uniforme et dépourvue de tels pores 11, ce qui est utile en particulier pour éviter tout aspect visuel négatif de la couche de protection 10.In the case of a side wall 3 with pores 11 on only a part of its height, these pores 11 are then advantageously arranged at a distance from the upper edge 4 and below the surface level of the products packaged in this body. box 1; an upper band of the side wall 3 provided with a uniform protective layer 10 and free of such pores 11 is thus obtained, which is particularly useful for preventing any negative visual appearance of the protective layer 10.

Dans toutes ces formes de réalisation, ces pores 11 peuvent être répartis et ménagés aléatoirement, ou non-aléatoirement (c'est-à-dire d'une manière déterminée et prédéfinie pour former, ensemble, un motif particulier et/ou régulier).In all these embodiments, these pores 11 may be distributed and arranged randomly, or non-randomly (that is to say in a predetermined manner and predetermined to form, together, a particular pattern and / or regular).

Toujours pour un compromis optimal entre l'esthétique et la libération recherchée d'étain, les pores 11 ont avantageusement une dimension maximale d supérieure à 0,1 µm, et de préférence inférieure à 5 mm ; ces pores 11 ont de préférence une dimension maximale d comprise entre 10 µm et 2,5 mm.Still for an optimal compromise between aesthetics and the desired release of tin, the pores 11 advantageously have a maximum dimension d greater than 0.1 μm, and preferably less than 5 mm; these pores 11 preferably have a maximum dimension d of between 10 μm and 2.5 mm.

Les pores 11 ont chacun une surface comprise entre 100 µm2 et 9 mm2.
Par « dimension » d'un pore, on entend de préférence la plus grande dimension de ce pore 11, tel qu'illustré par la cotation dimensionnelle d sur la figure 2.The pores 11 each have an area of between 100 μm 2 and 9 mm 2 .
By "dimension" of a pore is meant preferably the largest dimension of this pore 11, as illustrated by the dimensional dimension d on the figure 2 .

Ces pores 11 peuvent présenter un contour régulier, ou au moins approximativement régulier, par exemple de forme générale circulaire ou ovale tel que représenté sur la figure 2. De manière alternative, ce contour peut également être irrégulier.These pores 11 may have a regular contour, or at least approximately regular, for example of generally circular or oval shape as shown in FIG. figure 2 . Alternatively, this contour may also be irregular.

De plus, les pores 11 représentent ensemble avantageusement une surface comprise entre 10 % et 70 % (de préférence entre 17 % et 50 %) de la surface intérieure du corps de boîte 1, de préférence de la surface intérieure de la-paroi-latérale 3 et de préférence encore de la surface intérieure d'étain 7.In addition, the pores 11 advantageously together represent an area of between 10% and 70% (preferably between 17% and 50%) of the inner surface of the box body 1, preferably of the inner surface of the side wall 3 and more preferably the inner surface of tin 7.

Selon un mode de réalisation préféré, la couche de protection 10 consiste avantageusement en une couche de vernis, dont la composition et l'épaisseur notamment sont choisies par l'homme du métier en fonction de la denrée alimentaire conditionnée.According to a preferred embodiment, the protective layer 10 advantageously consists of a layer of varnish, the composition and thickness of which are chosen by those skilled in the art depending on the conditioned foodstuff.

Ce vernis de protection est choisi de préférence parmi le polyester et l'époxy-acrylate. Il peut être appliqué sous forme liquide ou en poudre.This protective varnish is preferably chosen from polyester and epoxy acrylate. It can be applied in liquid or powder form.

Son épaisseur est avantageusement comprise entre 2 µm et 80 µm, et de préférence encore entre 4 µm et 30 µm.Its thickness is advantageously between 2 microns and 80 microns, and more preferably between 4 microns and 30 microns.

La couche de vernis de protection multi-pores 10, 11 peut être obtenue au moyen d'un procédé comprenant, avant l'étape de remplissage avec le produit à conditionner, une étape d'application du vernis de protection sur la surface intérieure d'étain 7 de sorte à obtenir directement ladite couche de protection 10 munie de pores 11.The multi-porous protective varnish layer 10, 11 can be obtained by means of a process comprising, before the step of filling with the product to be packaged, a step of applying the protective varnish to the inner surface of the tin 7 so as to obtain directly said protective layer 10 provided with pores 11.

Selon un mode de réalisation possible, le vernis de protection appliqué consiste par exemple en une émulsion ou une dispersion comprenant (i) le vernis de protection proprement dit et (ii) un fluide (gaz ou liquide) dispersé dans ce vernis et qui est apte à être éliminé après l'opération d'application sur le corps de boîte 1 de manière à former les, pores 11 (en pratique, ce fluide dispersé est avantageusement non miscible ou peu miscible avec le vernis de protection).According to one possible embodiment, the protective varnish applied consists for example of an emulsion or dispersion comprising (i) the protective varnish itself and (ii) a fluid (gas or liquid) dispersed in this varnish and which is suitable to be removed after the application operation on the can body 1 so as to form the pores 11 (in practice, this dispersed fluid is preferably immiscible or poorly miscible with the protective varnish).

Dans le cas d'un liquide émulsionné dans le vernis de protection, ce liquide est destiné à être éliminé par évaporation naturelle ou active. Le liquide éliminé consiste par exemple en de l'eau.In the case of a liquid emulsified in the protective varnish, this liquid is intended to be removed by natural or active evaporation. The liquid removed consists for example of water.

Pour ajuster la libération d'étain sur la hauteur de la boîte, il peut être envisagé de faire varier le pourcentage de fluide dispersé dans le vernis de protection au cours de l'application.To adjust the release of tin on the height of the box, it may be envisaged to vary the percentage of fluid dispersed in the protective varnish during the application.

Par exemple, pour ménager les pores 11 à distance de la bordure supérieure 4 de la paroi latérale 3 et en-dessous du niveau de surface des produits destinés à être conditionnés dans le corps de boîte 1, il peut être prévu que:

  • le vernis de protection appliqué au-dessus du niveau de surface soit dépourvu du fluide dispersé, et
  • le vernis de protection appliqué au-dessous du niveau de surface contient une quantité appropriée de ce fluide dispersé.
For example, to keep the pores 11 away from the upper edge 4 of the side wall 3 and below the surface level of the products intended to be packaged in the can body 1, it can be provided that:
  • the protective varnish applied above the surface level is devoid of the dispersed fluid, and
  • the protective varnish applied below the surface level contains an appropriate amount of this dispersed fluid.

De manière générale, le vernis de protection peut être appliqué au moyen d'une buse de pulvérisation, d'un pinceau, d'une éponge et/ou d'un rouleau, ces moyens d'application étant convenablement pilotés de sorte à obtenir la couche de protection particulière telle que décrite ci-dessus.In general, the protective varnish may be applied by means of a spray nozzle, a brush, a sponge and / or a roller, these application means being suitably controlled so as to obtain the special protective layer as described above.

Selon encore un autre mode de réalisation possible, la couche de protection 10 consiste en un film solidaire de la surface intérieure du corps de boîte 1 et épousant cette dernière.
Ce film de protection 10 est choisi avec une résistance à l'allongement qui est inférieure à celle du matériau métallique constitutif dudit corps de boîte 1.According to yet another possible embodiment, the protective layer 10 consists of a film integral with the inner surface of the can body 1 and matching the latter.
This protective film 10 is chosen with an elongation resistance which is lower than that of the metallic material constituting said box body 1.

Ce film de protection 10 consiste avantageusement en un matériau de type polyéthylène téréphtalate ou polypropylène.
Ce film de protection 10 peut également consister en une couche de vernis comportant une épaisseur réduite, par exemple de l'ordre de 1 à 4 µm, de préférence de 1 à 2 µm (ou tout autre type de revêtement adapté), déchirée lors du formage de manière à générer les pores recherchés.This protective film 10 advantageously consists of a material of polyethylene terephthalate or polypropylene type.
This protective film 10 may also consist of a layer of varnish having a reduced thickness, for example of the order of 1 to 4 microns, preferably 1 to 2 microns (or any other type of adapted coating), torn at the forming so as to generate the desired pores.

Dans ce cas, le corps de boite monobloc 1 de la figure 1 peut être obtenu par la mise en oeuvre d'un procédé comprenant les étapes détaillées ci-dessous, avant l'étape de remplissage du produit.In this case, the one-piece box body 1 of the figure 1 can be obtained by carrying out a method comprising the steps detailed below, before the step of filling the product.

Tout d'abord, on fabriqué une pièce métallique dont la mise en forme va permettre de constituer le corps de boîte 1. Cette pièce métallique est recouverte du film laminé collé 10 (ou la couche de vernis de protection relativement fine), intact ou intègre, qui est destiné constituer la couche de protection et qui présente une résistance à l'allongement inférieure à celle du matériau métallique constitutif de la pièce métallique.
Ensuite, cet ensemble est mis en forme, par exemple par emboutissage, pour constituer le corps de boîte 1.
Cette opération de mise en forme génère une déchirure partielle et locale du film de protection 10, cela du fait de l'allongement de la pièce 1 dans des conditions qui sont supérieures à la résistance à l'allongement du film laminé 10. Cette opération d'étirage crée ainsi un ensemble de pores, criques ou déchirures 11 faisant office de passages libres à l'étain sous-jacent.Firstly, a metal part is manufactured, the shaping of which will make it possible to constitute the can body 1. This metal part is covered with the bonded laminated film 10 (or the relatively fine protective lacquer layer), intact or intact. which is intended to form the protective layer and which has a resistance to elongation lower than that of the metallic material constituting the metal part.
Then, this assembly is shaped, for example by stamping, to form the box body 1.
This forming operation generates a partial and local tearing of the protective film 10, because of the elongation of the workpiece 1 under conditions that are greater than the resistance to elongation of the laminated film 10. This operation of Stretching thus creates a set of pores, cracks or tears 11 acting as free passages to the underlying tin.

Une fois le corps de boîte obtenu, avec sa couche de protection multi-pores 10, 11 constituée, le contenant peut être rempli avec le produit à conditionner, et l'ouverture de remplissage 5 peut ensuite être obturée avec un second élément de fond rapporté.Once the box body obtained, with its multi-porous protective layer 10, 11 constituted, the container can be filled with the product to be packaged, and the filling opening 5 can then be closed with a second bottom element reported. .

Tel qu'illustré sur les figures 1 et 2, la paroi latérale 3 est de forme générale tubulaire cylindrique ; elle pourrait de manière alternative présenter toute autre configuration et section souhaitée : elle pourrait présenter par exemple une section radiale ovale, rectangulaire ou carrée, oblongue, etc.
De même, elle peut comporter sur sa hauteur un ensemble de nervures ou rainures, bosselages, rétreints, etc.As illustrated on Figures 1 and 2 , the side wall 3 is of generally cylindrical tubular shape; it could alternatively have any other configuration and desired section: it could have for example a radial section oval, rectangular or square, oblong, etc.
Similarly, it may have on its height a set of ribs or grooves, dents, necking, etc.

Le contenant selon l'invention présente une surface intérieure qui est partiellement protégée. Les zones libres 7a de la surface intérieure d'étain 7 sont agencées de manière à limiter l'impact visuel de la réaction chimique avec le produit conditionné. De plus, les zones d'étain exposées 7a sont distribuées ici sur la hauteur de la paroi latérale 3, ce qui permet une meilleure distribution de l'étain dans le produit conditionné.The container according to the invention has an inner surface which is partially protected. The free zones 7 a of the inner surface of tin 7 are arranged to limit the visual impact of the chemical reaction with the packaged product. Moreover, the exposed tin zones are distributed 7 has here the height of the side wall 3, which allows a better distribution of tin into the packed product.

Claims (14)

  1. A container of the can type, intended to receive a product to be packaged, in particular a food item, wherein said container comprises a can body (1) consisted of a bottom element (2) that is continued by a side wall (3) whose upper edge (4) delimits an upper opening (5) intended to receive a sealing element, wherein said can body (1) delimits an inner packaging volume (6) and has an inner surface (7) at least partially consisted of tin, which is covered with a protective layer (10) intended to resist to the chemical action of said product to be packaged,
    characterized in that said protective layer (10) includes, distributed over at least a portion of its surface, a plurality of pores (11) through each of which an opposite area (7a) of said tin inner surface (7) can be accessed from said container inner volume (6),
    wherein the pores (11) of the protective layer (10) each have a surface area comprised between 100 µm2 and 9 mm2.
  2. A container according to claim 1, characterized in that the pores (11) of the protective layer (10) are uniformly or at least approximately uniformly distributed over the tin inner surface (7).
  3. A container according to claim 1, characterized in that the pores (11) of the protective layer (10) are grouped on a portion of the tin inner surface (7).
  4. A container according to claim 3, characterized in that the pores (11) are arranged remote from the upper edge (4) of the side wall (3) and under the surface level of the products intended to be packaged in the can body (1), so as to obtain an upper strip of said side wall (3) provided with a uniform protective layer (10), devoid of such pores (11).
  5. A container according to any one of claims 1 to 4, characterized in that the pores (11) of the protective layer (10) are arranged randomly or non-randomly.
  6. A container according to any one of claims 1 to 5, characterized in that the pores (11) of the protective layer (10) have a maximum size (d) greater than 0.1 µm.
  7. A container according to any one of claims 1 to 6, characterized in that the pores (11) of the protective layer (10) represent together a surface area comprised between 10 % and 70 % with respect to the inner surface area of the can body (1).
  8. A container according to any one of claims 1 to 7, characterized in that the protective layer (10) consists of a protective lacquer.
  9. A container according to any one of claims 1 to 8, characterized in that the protective layer (10) consists of an integral protective film conforming the inner surface of the can body (1), wherein said protective film (10) has a resistance to elongation that is lower than that of the metal material of which said can body (1) is made.
  10. A method of manufacturing a container according to any one of claims 1 to 9, wherein said container comprises a can body (1) consisted of a bottom element (2) that is continued by a side wall (3) whose upper edge (4) delimits an upper opening (5) intended to receive a sealing element, wherein said can body (1) delimits an inner packaging volume (6) and has an inner surface (7) at least partially consisted of tin, which is covered with a protective layer (10) intended to resist to the chemical action of said product to be packaged, characterized in that said method comprises, before the step of filling with the product to be packaged, a step of obtaining said protective layer (10) including, distributed over at least a portion of its surface, a plurality of pores (11) through each of which an opposite area (7a) of said tin inner surface (7) can be accessed from said container inner volume (6), wherein the pores (11) of the protective layer (10) each have a surface area comprised between 100 µm2 and 9 mm2.
  11. A method according to claim 10, characterized in that the protective layer (10) consists of a protective lacquer that is applied on the tin inner surface (7) so as to obtain, before the filling, said protective layer (10) with the pores (11) for access to said tin inner surface (7).
  12. A method according to claim 11, characterized in that the applied protective lacquer advantageously consists of an emulsion or a dispersion comprising (i) the actual protective lacquer and (ii) a fluid dispersed within said lacquer and that is capable of being eliminated after the operation of application on the can body (1), so as to form the pores (11).
  13. A method according to claim 12, characterized in that the fluid dispersed within the lacquer consists of a liquid intended to be eliminated by natural or active evaporation.
  14. A method according to claim 10, characterized in that it comprises, before the step of filling, the steps of:
    - providing at least one metal part intended to be shaped to form at least a portion of the container can body (1), said metal part being covered with a protective film intended to form the protective layer (10) and having a resistance to elongation that is lower than that of the metal material from which said metal part is made, and
    - shaping said metal part (1) to form at least a portion of said container can body (1), said shaping operation causing an elongation of said metal part (1), which forms the pores (11) in said protective film (10), by tearing the latter.
EP10807603.5A 2009-12-17 2010-12-16 Can-shaped container having a protective inner layer Not-in-force EP2512937B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16151810.5A EP3025977B1 (en) 2009-12-17 2010-12-16 Method for producing a container in the form of a can with an inner protection layer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0906114A FR2954291B1 (en) 2009-12-17 2009-12-17 CONTAINER IN THE FORM OF CANISTER BOX WITH INTERNAL PROTECTION LAYER
PCT/FR2010/052769 WO2011073583A1 (en) 2009-12-17 2010-12-16 Can-shaped container having a protective inner layer

Related Child Applications (2)

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EP16151810.5A Division-Into EP3025977B1 (en) 2009-12-17 2010-12-16 Method for producing a container in the form of a can with an inner protection layer
EP16151810.5A Division EP3025977B1 (en) 2009-12-17 2010-12-16 Method for producing a container in the form of a can with an inner protection layer

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EP2512937A1 EP2512937A1 (en) 2012-10-24
EP2512937B1 true EP2512937B1 (en) 2016-03-30

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EP (2) EP3025977B1 (en)
JP (1) JP5716039B2 (en)
KR (2) KR101837125B1 (en)
CN (2) CN104044796B (en)
AU (1) AU2010332628A1 (en)
BR (1) BR112012014195A2 (en)
CA (1) CA2784798C (en)
DK (1) DK2512937T3 (en)
ES (2) ES2578083T3 (en)
FR (1) FR2954291B1 (en)
HU (2) HUE028905T2 (en)
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JP4899745B2 (en) * 2006-09-22 2012-03-21 Ｊｆｅスチール株式会社 Resin film coated metal can
PT2082968E (en) * 2008-01-25 2012-01-17 Ardagh Mp Group Netherlands Bv Can with partial interior lacquering and method for manufacturing the same

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KR101877328B1 (en) 2018-08-07
KR20170023199A (en) 2017-03-02
US9511902B2 (en) 2016-12-06
CN102725198B (en) 2014-12-10
KR101837125B1 (en) 2018-03-09
ZA201203384B (en) 2013-01-30
BR112012014195A2 (en) 2017-04-04
CA2784798A1 (en) 2011-06-23
EP3025977A1 (en) 2016-06-01
EP3025977B1 (en) 2017-06-28
FR2954291B1 (en) 2012-03-09
RU2012130132A (en) 2014-01-27
PL3025977T3 (en) 2017-11-30
US20120255262A1 (en) 2012-10-11
ES2641550T3 (en) 2017-11-10
KR20120107474A (en) 2012-10-02
DK2512937T3 (en) 2016-07-04
EP2512937A1 (en) 2012-10-24
HUE028905T2 (en) 2017-01-30
JP5716039B2 (en) 2015-05-13
JP2013514240A (en) 2013-04-25
WO2011073583A1 (en) 2011-06-23
MA33749B1 (en) 2012-11-01
CN102725198A (en) 2012-10-10
FR2954291A1 (en) 2011-06-24
AU2010332628A1 (en) 2012-06-21
RU2555947C2 (en) 2015-07-10
CN104044796A (en) 2014-09-17
CA2784798C (en) 2017-11-07
CN104044796B (en) 2016-06-08
HUE034520T2 (en) 2018-02-28
PL2512937T3 (en) 2016-09-30
ES2578083T3 (en) 2016-07-20

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