EP1357055B1 - Food package having a sealing area of least resistance - Google Patents

Food package having a sealing area of least resistance Download PDF

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Publication number
EP1357055B1
EP1357055B1 EP03364005A EP03364005A EP1357055B1 EP 1357055 B1 EP1357055 B1 EP 1357055B1 EP 03364005 A EP03364005 A EP 03364005A EP 03364005 A EP03364005 A EP 03364005A EP 1357055 B1 EP1357055 B1 EP 1357055B1
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EP
European Patent Office
Prior art keywords
packaging according
sealing
zone
islands
packaging
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.)
Expired - Lifetime
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EP03364005A
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German (de)
French (fr)
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EP1357055A1 (en
Inventor
Eugène Lebreton
Christian Merlateau
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Saint Andre Plastique
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Saint Andre Plastique
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Publication of EP1357055A1 publication Critical patent/EP1357055A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/22—Details
    • B65D77/225—Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element
    • 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
    • B65D2205/00—Venting means

Definitions

  • the field of the invention is that of the packaging of food products. More specifically, the invention relates to a packaging for packaging a food or a food preparation intended to be heated or cooked, in particular in a microwave oven, the package comprising a flexible material having a sealing zone.
  • Some of these products are intended to be reheated or cooked before consumption, various heating means being generally possible, and in particular mico-wave reheating.
  • the packaging of these foods or prepared dishes is made in a sealed manner, which is likely to cause a greater or lesser pressure increase within the package during reheating, depending on the power and duration of this reheating.
  • the pressure in the package is such that, at the time of the opening of the- by the consumer, the latter may suffer, with more or less damage, hot steam projections and possibly part of the content (for example a sauce).
  • the invention aims to overcome the disadvantages of the prior art.
  • the invention aims to provide a packaging of a food preparation intended to be heated which avoids an excessive increase in the pressure inside the package during reheating.
  • the invention also aims to provide such a package that is simple and inexpensive to achieve.
  • the invention aims to provide such a package that can be made from a polymer film that can be used with conventional machines, requiring no specific investment.
  • the invention also aims to provide such packaging that is safe and convenient for the consumer.
  • a packaging for the packaging of a food or a food preparation intended to be reheated or cooked in particular to the using a microwave oven, of the type comprising at least one sheet of flexible material having at least one sealing zone, characterized in that said sealing zone is partially coated with a material having an effect limiting the propagation of the heat of sealing distributed over said zone so as to provide at least one island devoid of said material having a limiting effect.
  • This opening due to the increase in pressure may occur in a similar manner in the case where the packaging according to the invention contains a fermentable food, likely to cause the formation of a gas, including in the absence of heating .
  • the invention thus avoids any risk of bursting, or even explosion, of the packaging. Since the opening of the packaging has already taken place during reheating, the invention also prevents the consumer from being subjected to projections of the contents at the time of opening of the packaging, unlike certain packages of the prior art.
  • the invention is equally applicable to packaging containing food preparations intended to be reheated, as well as food, possibly uncompounded, raw or cooked.
  • said sealing zone has a plurality of islands devoid of said limiting material.
  • said islands each extend over an area of between about 0.25 mm 2 and about 25 mm 2.
  • said sealing zone comprises between 1 and 100 islands per cm 2.
  • said sealing zone comprises 25 islands per cm 2
  • the choice of the distribution and / or the quantity of the limiting effect material will depend on the quality of the desired weld. In particular, it will be possible to provide a number of islands per square centimeter which ensures that the packaging is kept watertight for a predetermined period of time so as to allow "steam” or "pressure cooker” cooking or reheating.
  • said islands have essentially a diamond shape.
  • said material having a limiting effect on the propagation of heat upon sealing comprises at least one lacquer and / or at least one coating.
  • the packaging may be made of any other flexible material, complexed or not, sealable, in other embodiments, without departing from the scope of the invention.
  • said flexible material is shaped into a bag having at least two lips delimiting an opening / closing zone of said package.
  • said limiting effect material is deposited on said sealing zone of only one of said lips of said bag.
  • said limiting effect material is deposited on said sealing zone of each of said two lips of said bag.
  • said bag comprises at least one bottom bellows.
  • Such a bottom bellows allows the consumer to deposit the bag in the reheating apparatus by maintaining it in upright position. It should be noted that the bag may also alternatively have one or more lateral bellows so as to improve the presentation of the package.
  • said flexible material forms a lid intended to be attached to a container-type receptacle
  • the invention also relates to a film for producing a packaging as described above, characterized in that it has at least one zone partially coated with a material having a limiting effect on the propagation of the heat of sealing distributed on said zone so as to provide at least one island devoid of said limiting material
  • a packaging for packaging a food preparation 1 intended to be heated comprises a sheath 2 made of a flexible material (coextruded polyolefin film, mono or bi-oriented, or complexed).
  • the package could consist of a single sheet (obtained from a film) folded on itself and sealed on three of its sides in order to constitute a sachet enclosing a food preparation. It could also be made of two flexible sheets welded together, as will be described later.
  • each sheet 2 has two lips 21 sealed together, a part of the sealing zone 20 being coated with a lacquer 22 forming a material having a limiting effect on the propagation of the heat of sealing (sealing being of lesser resistance in this lacquered area), while a plurality of islands 23 are devoid of this lacquer.
  • the number of islands shown in FIG. 1 is illustrated for information only, and will preferably be 25 islands per cm 2, each island extending over an area of approximately 1 mm 2.
  • the islands present in the present case a diamond shape, but may similarly have a square shape, round or oval, as illustrated respectively in Figures 3, 4 and 5, or any other suitable form .
  • the coated area of the lacquer 22 yields, after a predetermined time, to the pressure which rises inside the packaging, either passages between the islands 23 to let escape water vapor, or a complete separationcellage zone 20.
  • the package has three welds 24 incorporating sealing zones 20, coated with a lacquer, while islands 23 are devoid of this lacquer.
  • the sealing zones 20 may therefore have a triangle shape or be provided in the form of straight or inclined streaks.
  • such a package combines sealing zones according to the invention and a solid sealing zone.
  • the package according to the embodiment illustrated in FIG. 6 is obtained from two sheets of a flexible material (the two sheets may also be made of different materials) sealed together on each side by their lips. respective 21.
  • this package has sealing zones 20 coated with a lacquer 22, while islands 23 are devoid of this lacquer.

Abstract

The packaging for foodstuffs (1), for reheating or cooking and especially in a microwave oven, has at least one sheet (2) of a flexible material of paper or metal or plastics, with at least one sealing zone (20). The sealing zone has two sealing lips (21), sealed by a lacquer (22) with a number of islets (23) giving a lower heat resistance, and allow the escape of steam during cooking without destruction of the seal. The islets can be in a lozenge or other shapes.

Description

Le domaine de l'invention est celui du conditionnement de produits alimentaires. Plus précisément, l'invention concerne un emballage pour le conditionnement d'un aliment ou d'une préparation alimentaire destinée à être réchauffé ou cuit, notamment dans un four micro-ondes, l'emballage comprenant un matériau souple présentant une zone de scellement.The field of the invention is that of the packaging of food products. More specifically, the invention relates to a packaging for packaging a food or a food preparation intended to be heated or cooked, in particular in a microwave oven, the package comprising a flexible material having a sealing zone.

Dans le domaine de l'invention, il est classique de proposer des aliments ou des plats préparés dans des sachets formés d'une ou de plusieurs feuilles souples, ou encore dans des barquettes fermées par un opercule formé d'une feuille d'une matériau souple.In the field of the invention, it is conventional to provide foods or dishes prepared in bags formed of one or more flexible sheets, or in trays closed by a lid formed of a sheet of a material. flexible.

Certains de ces produits sont destinés à être réchauffés ou cuits avant consommation, différents moyens de réchauffage étant généralement envisageables, et notamment le réchauffage au mico-ondes.Some of these products are intended to be reheated or cooked before consumption, various heating means being generally possible, and in particular mico-wave reheating.

Le conditionnement de ces aliments ou plats préparés est réalisé de façon étanche, ce qui est susceptible d'entraîner une augmentation de pression plus ou moins importante au sein de l'emballage au cours du réchauffage, en fonction de la puissance et de la durée de ce réchauffage.The packaging of these foods or prepared dishes is made in a sealed manner, which is likely to cause a greater or lesser pressure increase within the package during reheating, depending on the power and duration of this reheating.

Deux conséquences peuvent le cas échéant être déplorées.Two consequences can, if necessary, be lamented.

En premier lieu, l'augmentation de la pression à l'intérieur de l'emballage peut atteindre un niveau tel qu'elle provoque purement et simplement l'explosion de l'emballage ainsi que la dispersion de son contenu. Une telle conséquence est bien entendue inacceptable de par le désagrément qu'elle suscite pour le consommateur.In the first place, the increase in pressure inside the packaging can reach a level such that it causes purely and simply the explosion of the package and the dispersion of its contents. Such a consequence is, of course, unacceptable because of the inconvenience to the consumer.

Cette conséquence peut bien entendu être évitée en ouvrant partiellement l'emballage, évitant ainsi la montée en pression à l'intérieur de celui-ci. Toutefois, l'ouverture de ces emballages n'est pas aisée et peut aboutir, dans certains cas, à une déchirure de l'emballage plus importante que celle souhaitée par le consommateur, entraînant éventuellement un déversement du contenu hors de l'emballage.This consequence can of course be avoided by partially opening the package, thus avoiding the rise in pressure inside thereof. However, the opening of these packages is not easy and can lead, in some cases, to a larger tear of the package than desired by the consumer, possibly resulting in a spill of the contents out of the package.

Dans le cas où l'augmentation de la pression ne provoque pas l'éclatement de l'emballage, une autre conséquence peut alors apparaître.In the case where the increase of the pressure does not cause the bursting of the package, another consequence can then appear.

En effet, la pression dans l'emballage est telle que, au moment de l'ouverture de celui- par le consommateur, ce dernier peut subir, avec plus ou moins de dommages, des projections de vapeur brûlante et éventuellement d'une partie du contenu (par exemple une sauce).Indeed, the pressure in the package is such that, at the time of the opening of the- by the consumer, the latter may suffer, with more or less damage, hot steam projections and possibly part of the content (for example a sauce).

Une telle conséquence est elle aussi inacceptable.Such a consequence is also unacceptable.

Pour remédier à ces inconvénients, il a été proposé de rapporter sur certains emballages des valves d'obturation qui s'ouvrent automatiquement lorsque la pression dans l'emballage atteint un niveau prédéterminée.To overcome these drawbacks, it has been proposed to report on some packages shutter valves that open automatically when the pressure in the package reaches a predetermined level.

Une telle solution apparaît satisfaisante en termes de résultat. Cependant, de telles valves rendent plus complexe la fabrication de l'emballage, et augmente le prix de revient de celui-ci.Such a solution appears satisfactory in terms of the result. However, such valves make more complex the manufacture of the package, and increases the cost of it.

L'invention a pour objectif de pallier les inconvénients de l'art antérieur.The invention aims to overcome the disadvantages of the prior art.

Plus précisément, l'invention a pour objectif de proposer un emballage d'une préparation alimentaire destinée à être réchauffée qui évite une augmentation excessive de la pression à l'intérieur de l'emballage pendant le réchauffage.More specifically, the invention aims to provide a packaging of a food preparation intended to be heated which avoids an excessive increase in the pressure inside the package during reheating.

L'invention a également pour objectif de fournir un tel emballage qui soit simple et peu coûteux à réaliser.The invention also aims to provide such a package that is simple and inexpensive to achieve.

Notamment, l'invention a pour objectif de fournir un tel emballage qui peu être réalisé à partir d'un film polymère pouvant être utilisé avec des machines classiques, ne nécessitant aucun investissement spécifique.In particular, the invention aims to provide such a package that can be made from a polymer film that can be used with conventional machines, requiring no specific investment.

L'invention a aussi pour objectif de fournir un tel emballage qui soit sûr et pratique d'utilisation pour le consommateur.The invention also aims to provide such packaging that is safe and convenient for the consumer.

Ces objectifs ainsi que d'autres qui apparaîtront par la suite, sont atteints grâce à l'invention qui a pour objet un emballage pour le conditionnement d'un aliment ou d'une préparation alimentaire destinée à être réchauffée ou cuit, notamment à l'aide d'un four à micro-ondes, du type comprenant au moins une feuille en matériau souple présentant au moins une zone de scellement, caractérisé en ce que ladite zone de scellement est enduite partiellement d'un matériau à effet limitatif de la propagation de la chaleur de scellement répartie sur ladite zone de façon à ménager au moins un îlot dépourvu dudit matériau à effet limitatif.These objectives, as well as others that will appear later, are achieved by virtue of the invention which relates to a packaging for the packaging of a food or a food preparation intended to be reheated or cooked, in particular to the using a microwave oven, of the type comprising at least one sheet of flexible material having at least one sealing zone, characterized in that said sealing zone is partially coated with a material having an effect limiting the propagation of the heat of sealing distributed over said zone so as to provide at least one island devoid of said material having a limiting effect.

Ainsi, on obtient un emballage comportant une zone de scellement de moindre résistance tout en étant étanche. En d'autres termes, l'étanchéité est assurée par des points (îlots) de scellement traditionnels, tandis que la résistance du scellement est diminuée en d'autres endroits de la zone de scellement.Thus, there is obtained a package having a sealing zone of least resistance while being waterproof. In other words, the sealing is provided by traditional sealing points (islands), while the strength of the seal is decreased in other areas of the sealing area.

De cette façon, on crée des zones de "dé-scellage" progressif. En effet, les îlots de scellage traditionnels maintiennent l'étanchéité de l'emballage, jusqu'à la pression à l'intérieur de l'emballage atteigne un niveau prédéterminée, à partir duquel les zones enduites matériau à effet limitatif du scellement cèdent progressivement à la pression, créant une ouverture dans l'emballage qui laisse échapper vers l'extérieur un flux de vapeur (ou autre gaz).In this way, one creates zones of "dé-sealing" progressive. Indeed, the traditional sealing islands maintain the tightness of the package, until the pressure inside the package reaches a predetermined level, from which the coated areas sealing effect material yield progressively to the pressure, creating an opening in the package that lets out a flow of steam (or other gas) to the outside.

Cette ouverture due à l'augmentation de la pression peut intervenir de façon similaire dans le cas où l'emballage selon l'invention renferme un aliment fermentescible, susceptible d'entraîner la formation d'un gaz, y compris en l'absence de chauffage.This opening due to the increase in pressure may occur in a similar manner in the case where the packaging according to the invention contains a fermentable food, likely to cause the formation of a gas, including in the absence of heating .

L'invention évite donc tout risque d'éclatement, voire d'explosion, de l'emballage. L'ouverture de l'emballage ayant déjà eu lieu au cours du réchauffage, l'invention évite également au consommateur de subir des projections du contenu au moment de l'ouverture de l'emballage contrairement à certains emballages de l'art antérieur.The invention thus avoids any risk of bursting, or even explosion, of the packaging. Since the opening of the packaging has already taken place during reheating, the invention also prevents the consumer from being subjected to projections of the contents at the time of opening of the packaging, unlike certain packages of the prior art.

L'invention s'applique tout aussi bien à des emballages renfermant des préparations alimentaires destinées à être réchauffées, qu'à des aliments, éventuellement non composés, crus ou cuits.The invention is equally applicable to packaging containing food preparations intended to be reheated, as well as food, possibly uncompounded, raw or cooked.

Selon une solution préférée de l'invention, ladite zone de scellement présente une pluralité d'îlots dépourvus dudit matériau à effet limitatif.According to a preferred solution of the invention, said sealing zone has a plurality of islands devoid of said limiting material.

Selon une solution avantageuse, lesdits îlots s'étendent chacun sur une surface comprise entre environ 0,25 mm2 et environ 25 mm2.According to an advantageous solution, said islands each extend over an area of between about 0.25 mm 2 and about 25 mm 2.

Bien entendu, d'autres dimensions des îlots peuvent être envisagées dans d'autres modes de réalisation, sans sortir du cadre de l'invention.Of course, other dimensions of the islands can be envisaged in other embodiments, without departing from the scope of the invention.

Selon une solution préférentielle, ladite zone de scellement comprend entre 1 et 100 îlots par cm2. Préférentiellement, ladite zone de scellement comprend 25 îlots par cm2According to a preferred solution, said sealing zone comprises between 1 and 100 islands per cm 2. Preferably, said sealing zone comprises 25 islands per cm 2

Le choix de la répartition et/ou de la quantité du matériau à effet limitatif sera fonction de la qualité de la soudure recherchée. On pourra notamment prévoir un nombre d'îlots au cm2 qui assure de maintenir l'étanchéité de l'emballage pendant une durée prédéterminée pour permettre une cuisson ou un réchauffage de type "à la vapeur" ou "cocotte minute".The choice of the distribution and / or the quantity of the limiting effect material will depend on the quality of the desired weld. In particular, it will be possible to provide a number of islands per square centimeter which ensures that the packaging is kept watertight for a predetermined period of time so as to allow "steam" or "pressure cooker" cooking or reheating.

Avantageusement, lesdits îlots présentent une forme appartenant au groupe suivant :

  • ronde ;
  • ovoïde ;
  • carrée ;
  • triangle ;
  • en étoile.
Advantageously, said islands have a form belonging to the following group:
  • round;
  • ovoid;
  • square;
  • triangle;
  • in star.

Selon une autre solution avantageuse, lesdits îlots présentent essentiellement une forme de losange.According to another advantageous solution, said islands have essentially a diamond shape.

Avantageusement, ledit matériau à effet limitatif de la propagation de la chaleur au scellage comprend au moins une laque et/ou au moins une enduction.Advantageously, said material having a limiting effect on the propagation of heat upon sealing comprises at least one lacquer and / or at least one coating.

Préférentiellement, ledit matériau souple comprend au moins un des matériaux appartenant au groupe suivant :

  • film polyoléfine co-extrudé ;
  • film polyoléfine mono ;
  • film polyoléfine bi-orienté ;
  • film polyoléfine complexé ;
  • papier ;
  • aluminium.
Preferably, said flexible material comprises at least one of the materials belonging to the following group:
  • coextruded polyolefin film;
  • mono polyolefin film;
  • bi-oriented polyolefin film;
  • complexed polyolefin film;
  • paper;
  • aluminum.

L'emballage pourra être réalisé dans tout autre matériau souple, complexé ou non, scellable, dans d'autres modes de réalisation, sans sortir du cadre de l'invention.The packaging may be made of any other flexible material, complexed or not, sealable, in other embodiments, without departing from the scope of the invention.

Selon une première approche, ledit matériau souple est conformé en sachet présentant au moins deux lèvres délimitant une zone d'ouverture/fermeture dudit emballage.According to a first approach, said flexible material is shaped into a bag having at least two lips delimiting an opening / closing zone of said package.

Selon un premier mode de réalisation de cette première approche, ledit matériau à effet limitatif est déposé sur ladite zone de scellement d'une seule desdites lèvres dudit sachet.According to a first embodiment of this first approach, said limiting effect material is deposited on said sealing zone of only one of said lips of said bag.

Selon un deuxième mode de réalisation de cette première approche, ledit matériau à effet limitatif est déposé sur ladite zone de scellement de chacune desdites deux lèvres dudit sachet.According to a second embodiment of this first approach, said limiting effect material is deposited on said sealing zone of each of said two lips of said bag.

Avantageusement, ledit sachet comprend au moins un soufflet de fond.Advantageously, said bag comprises at least one bottom bellows.

Un tel soufflet de fond permet au consommateur de déposer le sachet dans l'appareil de réchauffage en le maintenant en station debout. On note que le sachet pourra également ou alternativement présenter un ou plusieurs soufflets latéraux de façon à améliorer la présentation de l'emballage.Such a bottom bellows allows the consumer to deposit the bag in the reheating apparatus by maintaining it in upright position. It should be noted that the bag may also alternatively have one or more lateral bellows so as to improve the presentation of the package.

Bien entendu, de tels soufflets sont optionnels et l'emballage pourra en être dépourvu selon un autre mode de réalisation envisageable.Of course, such bellows are optional and the packaging may be devoid of another embodiment possible.

Selon une deuxième approche, ledit matériau souple forme un opercule destiné à être rapporté sur un réceptacle de type barquetteAccording to a second approach, said flexible material forms a lid intended to be attached to a container-type receptacle

L'invention concerne également un film pour la réalisation d'un emballage tel que décrit précédemment, caractérisé en ce qu'il présente au moins une zone enduite partiellement d'un matériau à effet limitatif de la propagation de la chaleur de scellement répartie sur ladite zone de façon à ménager au moins un îlot dépourvu dudit matériau à effet limitatifThe invention also relates to a film for producing a packaging as described above, characterized in that it has at least one zone partially coated with a material having a limiting effect on the propagation of the heat of sealing distributed on said zone so as to provide at least one island devoid of said limiting material

D'autres caractéristiques et avantages de l'invention apparaîtront plus clairement à la lecture de la description de plusieurs modes de réalisation préférentiels de l'invention, donnés à titre d'exemples illustratifs et non limitatifs, et des dessins annexés parmi lesquels :

  • la figure 1 est une vue d'un emballage comprenant deux zones de scellement selon l'invention et réalisé à partir d'un fourreau ;
  • la figure 2 est une vue d'un emballage comprenant trois zones de scellement selon l'invention ;
  • les figures 3 à 5 sont des vues de différents modes de réalisation des îlots de scellage d'un emballage selon l'invention ;
  • la figure 6 est une vue d'un emballage selon l'invention et réalisé à partir de feuilles souples.
Other features and advantages of the invention will appear more clearly on reading the description of several preferred embodiments of the invention, given by way of illustrative and non-limiting examples, and the appended drawings among which:
  • Figure 1 is a view of a package comprising two sealing zones according to the invention and made from a sleeve;
  • Figure 2 is a view of a package comprising three sealing zones according to the invention;
  • Figures 3 to 5 are views of different embodiments of the sealing islands of a package according to the invention;
  • Figure 6 is a view of a package according to the invention and made from flexible sheets.

En référence à la figure 1, un emballage, pour le conditionnement d'une préparation alimentaire 1 destinée à être réchauffée, comprend un fourreau 2 réalisé en un matériau souple (film polyoléfine co-extrudé, mono ou bi-orienté, ou complexé).With reference to FIG. 1, a packaging for packaging a food preparation 1 intended to be heated comprises a sheath 2 made of a flexible material (coextruded polyolefin film, mono or bi-oriented, or complexed).

On note que selon un autre mode de réalisation envisageable, l'emballage pourrait être constitué d'une seule feuille (obtenue à partir d'un film) repliée sur elle-même et scellé sur trois de ses côtés afin de constituer un sachet renfermant une préparation alimentaire. Il pourrait encore être constitué de deux feuilles souples soudées entre elles, comme cela va être décrit par la suite.It should be noted that according to another conceivable embodiment, the package could consist of a single sheet (obtained from a film) folded on itself and sealed on three of its sides in order to constitute a sachet enclosing a food preparation. It could also be made of two flexible sheets welded together, as will be described later.

Selon le présent mode de réalisation, chaque feuille 2 présente deux lèvres 21 scellées entre elles, une partie de la zone de scellement 20 étant enduite d'une laque 22, formant matériau à effet limitatif de la propagation de la chaleur de scellement (le scellement étant de moindre résistance en cette zone enduite de laque), tandis qu'une pluralité d'îlots 23 sont dépourvus de cette laque.According to the present embodiment, each sheet 2 has two lips 21 sealed together, a part of the sealing zone 20 being coated with a lacquer 22 forming a material having a limiting effect on the propagation of the heat of sealing (sealing being of lesser resistance in this lacquered area), while a plurality of islands 23 are devoid of this lacquer.

Le nombre d'îlots représenté sur la figure 1 est illustré à titre indicatif, et sera préférentiellement de 25 îlots par cm2, chaque îlot s'étendant sur une surface d'environ 1 mm2.The number of islands shown in FIG. 1 is illustrated for information only, and will preferably be 25 islands per cm 2, each island extending over an area of approximately 1 mm 2.

Tel que cela apparaît, les îlots présentent dans le cas présent une forme de losange, mais pourront de façon similaire présenter une forme carrée, ronde ou ovale, tel que respectivement illustré par les figures 3, 4 et 5, ou encore toute autre forme appropriée.As it appears, the islands present in the present case a diamond shape, but may similarly have a square shape, round or oval, as illustrated respectively in Figures 3, 4 and 5, or any other suitable form .

Ainsi, pendant le chauffage de l'emballage et de la préparation alimentaire qu'il renferme, la zone enduite de la laque 22 cède, après un temps prédéterminée, à la pression qui s'élève à l'intérieur de l'emballage, ménageant soit des passages entre les îlots 23 pour laisser échapper de la vapeur d'eau, soit un déscellage complet de la zone 20.Thus, during the heating of the packaging and the food preparation it contains, the coated area of the lacquer 22 yields, after a predetermined time, to the pressure which rises inside the packaging, either passages between the islands 23 to let escape water vapor, or a complete déscellage zone 20.

Selon un autre mode de réalisation illustré par la figure 2, l'emballage présente trois soudures 24 intégrant des zones de scellement 20, enduites d'une laque, tandis que des îlots 23 sont dépourvus de cette laque.According to another embodiment illustrated in Figure 2, the package has three welds 24 incorporating sealing zones 20, coated with a lacquer, while islands 23 are devoid of this lacquer.

Les zones de scellement 20 peuvent donc présenter une forme de triangle ou être prévus sous forme de stries droites ou inclinées.The sealing zones 20 may therefore have a triangle shape or be provided in the form of straight or inclined streaks.

On note également qu'un tel emballage combine des zones de scellement selon l'invention et une zone de scellement pleine.It is also noted that such a package combines sealing zones according to the invention and a solid sealing zone.

L'emballage selon le mode de réalisation illustré par la figure 6, est obtenue à partir de deux feuilles d'un matériau souple (les deux feuilles pouvant également être réalisées en des matériaux différents) scellées entre elles sur chacun de leur côté par leur lèvres respectives 21.The package according to the embodiment illustrated in FIG. 6 is obtained from two sheets of a flexible material (the two sheets may also be made of different materials) sealed together on each side by their lips. respective 21.

De façon similaire aux modes de réalisation décrits précédemment, cet emballage présente des zones de scellement 20 enduites d'une laque 22, tandis que des îlots 23 sont dépourvus de cette laque.Similarly to the embodiments described above, this package has sealing zones 20 coated with a lacquer 22, while islands 23 are devoid of this lacquer.

Claims (15)

  1. A packaging for packing food or a prepared food product (1) intended to be reheated or cooked, in particular with the aid of a microwave oven, of the type comprising at least one sheet of flexible material (2) having at least one sealing zone (20),
    characterised in that the said sealing zone (20) is partly coated with a sealing material (22) which has the effect of limiting the propagation of heat, distributed over the said zone such that at least one island (23) having none of the said material which has the limiting effect is created.
  2. A packaging according to Claim 1, characterised in that the said sealing zone has a plurality of islands (23) having none of the said material which has the limiting effect.
  3. A packaging according to Claim 2, characterised in that the said islands (23) each extend over a surface area of between approximately 0.25 mm2 and approximately 25 mm2.
  4. A packaging according to Claim 2 or Claim 3,
    characterised in that the said sealing zone (20) includes between 1 and 100 islands (23) per cm2.
  5. A packaging according to Claim 4, characterised in that the said sealing zone (20) includes 25 islands (23) per cm2.
  6. A packaging according to any one of Claims 1 to 5,
    characterised in that the said islands (23) have a shape of one of the following group:
    - round;
    - ovoid;
    - square;
    - triangular;
    - star-shaped.
  7. A packaging according to any one of Claims 1 to 5,
    characterised in that the said islands (23) are substantially in the shape of a lozenge.
  8. A packaging according to any one of Claims 1 to 7,
    characterised in that the said material for sealing which has the effect of limiting the propagation of heat includes at least one varnish and/or at least one coating.
  9. A packaging according to any one of Claims 1 to 8,
    characterised in that the said flexible material includes at least one of the materials in the following group:
    - co-extruded polyolefin film;
    - mono polyolefin film;
    - bioriented polyolefin film;
    - complexed polyolefin film;
    - paper;
    - aluminium.
  10. A packaging according to any one of Claims 1 to 9,
    characterised in that the said flexible material is formed as a sachet having at least two lips (21) delimiting a zone for opening/closing the said packaging.
  11. A packaging according to Claim 10, characterised in that the said material (22) which has the limiting effect is deposited on the said sealing zone (20) of a single one of the said lips (21) of the said sachet.
  12. A packaging according to Claim 10, characterised in that the said material (22) which has the limiting effect is deposited on the said sealing zone (20) of each of the two lips (21) of the said sachet.
  13. A packaging according to any one of Claims 10 to 12,
    characterised in that the said sachet includes at least one base seam and/or at least one side seam.
  14. A packaging according to any one of Claims 1 to 9,
    characterised in that the said flexible material forms a cap intended to be mounted on a receptacle of the tray type.
  15. A film for making a packaging according to any one of Claims 1 to 14, characterised in that it has at least one zone (20) partly coated with a sealing material (22) which has the effect of limiting the propagation of heat, distributed over the said zone such that at least one island (23) having none of the said material (22) which has the limiting effect is created.
EP03364005A 2002-04-22 2003-04-18 Food package having a sealing area of least resistance Expired - Lifetime EP1357055B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0205026 2002-04-22
FR0205026A FR2838722B1 (en) 2002-04-22 2002-04-22 FOOD PACKAGE COMPRISING AT LEAST ONE LOWER STRENGTH SEALING AREA

Publications (2)

Publication Number Publication Date
EP1357055A1 EP1357055A1 (en) 2003-10-29
EP1357055B1 true EP1357055B1 (en) 2007-04-04

Family

ID=28686260

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03364005A Expired - Lifetime EP1357055B1 (en) 2002-04-22 2003-04-18 Food package having a sealing area of least resistance

Country Status (5)

Country Link
EP (1) EP1357055B1 (en)
AT (1) ATE358638T1 (en)
DE (1) DE60312915T2 (en)
ES (1) ES2285074T3 (en)
FR (1) FR2838722B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090202756A1 (en) * 2004-11-18 2009-08-13 Beth Jones Packaging with a Vent Region
JP2014076842A (en) * 2012-10-12 2014-05-01 Oita Prefecture Freshness keeping method of fruit/vegetable, packaged fruit/vegetable, fruit/vegetable packaging method, packaging machine, packaging system, and packaging material for fruit/vegetable
WO2018034344A1 (en) * 2016-08-19 2018-02-22 株式会社Ｗ Bag body

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006084402A1 (en) * 2005-02-10 2006-08-17 Karl Keller Method for preserving foodstuffs
DE102009018489A1 (en) * 2009-04-22 2010-10-28 Huhtamaki Ronsberg, Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg Packaging, in particular microwave packaging bags, with pressure compensating valve with variable flow cross section

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2633284A (en) * 1949-03-28 1953-03-31 Howard J Moffett Sealed cooking container for comestibles
DE2658631C2 (en) * 1976-12-23 1993-07-15 Alfred Ritter GmbH & Co KG, 7035 Waldenbuch Tubular bag packaging for confectionery
US5039001A (en) * 1990-06-18 1991-08-13 Kraft General Foods, Inc. Microwavable package and process
ATE149132T1 (en) * 1991-11-08 1997-03-15 Toyo Aluminium Kk HEAT SEALABLE PACKAGING
JPH0891451A (en) * 1994-09-27 1996-04-09 Howa Sangyo Kk Food package
FR2796924B1 (en) * 1999-07-29 2001-10-19 Proplast VALVE AND VALVE PACKAGING, PARTICULARLY FOR COOKING FOOD

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090202756A1 (en) * 2004-11-18 2009-08-13 Beth Jones Packaging with a Vent Region
JP2014076842A (en) * 2012-10-12 2014-05-01 Oita Prefecture Freshness keeping method of fruit/vegetable, packaged fruit/vegetable, fruit/vegetable packaging method, packaging machine, packaging system, and packaging material for fruit/vegetable
WO2018034344A1 (en) * 2016-08-19 2018-02-22 株式会社Ｗ Bag body

Also Published As

Publication number Publication date
FR2838722B1 (en) 2004-07-16
FR2838722A1 (en) 2003-10-24
EP1357055A1 (en) 2003-10-29
ATE358638T1 (en) 2007-04-15
ES2285074T3 (en) 2007-11-16
DE60312915T2 (en) 2007-12-13
DE60312915D1 (en) 2007-05-16

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