EP0234985B1 - Radiation-proof container - Google Patents
Radiation-proof container Download PDFInfo
- Publication number
- EP0234985B1 EP0234985B1 EP19870400126 EP87400126A EP0234985B1 EP 0234985 B1 EP0234985 B1 EP 0234985B1 EP 19870400126 EP19870400126 EP 19870400126 EP 87400126 A EP87400126 A EP 87400126A EP 0234985 B1 EP0234985 B1 EP 0234985B1
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- European Patent Office
- Prior art keywords
- layer
- container
- laminate
- radiation
- tight
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- 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.)
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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
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
- B65D81/30—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants by excluding light or other outside radiation
Definitions
- the present invention relates to a container or packaging, impervious to radiation at least in a sealing zone, and intended to protect its content against them, produced with a laminate comprising at least one layer impermeable to this radiation.
- a radiation-tight container in this case X-rays, produced from a laminate comprising a sheet impermeable to radiation, in this case a sheet of lead or aluminum, placed between two sheets of plastic, in this case polyethylene or polyester.
- Such a container, or packaging, or cover can be used to contain photographic film, electronic equipment, magnetic recording media, such as discs, tapes or cassettes, etc., for their transport, shipment , their archiving, and protect them against external electromagnetic and ionizing radiation, for example when going through airport security checks.
- this packaging formed as previously described, has serious drawbacks and in particular the following. If it constitutes a barrier against radiation, moreover more or less effective, in particular in the case of particularly sensitive photographic films, it favors, because of the internal layer of plastic material, and concomitantly with the introduction into the container. of plastic materials or devices, of electrostatic charges prejudicial to the good conservation of the information of these materials and other supports. In short, such a container, while offering a solution to one problem, nevertheless creates another.
- British patent application 2,060,488 discloses a container for light-sensitive materials produced in a laminate, the inner layer of which is made of high density polyethylene loaded with carbon, which makes it less electrifiable and gives it certain properties. antistatic.
- the present invention therefore aims to provide a container treating both the problem of protection against radiation and the problem of electrostatic charges.
- the present invention therefore relates to a container or packaging, impervious to radiation at least in a sealing zone and intended to protect its content against them, produced with a laminate comprising, in said sealing zone, at least one impermeable layer. to these radiations, characterized in that the internal layer of the laminate of the container is an electrically conductive layer and the impermeable layer extends only over a so-called filtering zone.
- the container of the invention provided with an electrically conductive internal layer, and preferably metallic, is truly non-electrifiable, and the contents mentioned above can be stored there without risk.
- non-electrifiable material means any material that is not electrifiable both by influence and by contact, that is to say that it cannot undergo, or practically not, electrification by influence or by contact.
- the impermeable layer extending only over a filtering zone, it only protects certain parts of the contents of the container by carrying out local filtering of the desired radiation.
- the container of the invention finds another application in the thawing and cooking by microwave radiation of frozen products, so as to selectively expose directly and also by reflection on the partial sealed area certain parts of the products and obtain a more intense cooking of these, for example to brown a cooked dish.
- the laminate comprises an outer layer of relatively rigid thermal insulating material.
- the container of the invention has the advantage of being able to easily receive, on its external layer serving as a support for commercial information. , not to mention its mailing which is also facilitated.
- the layers of the laminate of the container of the invention are assembled by an adhesive without solvent, contrary to the known container, which eliminates any risk of migration of solvent not only on the overall content of the container but also, and more particularly, on the binder of metallic particles of magnetic supports when there are.
- the laminate in which a strip is cut from which one forms, or realizes, the container, or packaging, will only be described after precisely the process for producing the container of the invention, and more particularly here of a pouch intended to protect a frozen food product.
- the strip is folded along two straight lines 1, 2 parallel to the two longitudinal edges 3, 4 of the strip, and it is folded outwards along a third straight line 5, parallel to the same edges and extending between fold 2 and edge 4, the portion of strip adjacent to edge 4 to be able to fold down the portion of strip comprised between edge 3 and fold 1 on the portion of strip comprised between edge 4 and fold 5, edges 3 , 4 then extending one over the other.
- This double folded portion 6, 7, 8 is then fixed on the portion adjacent to the fold 8 of the rest of the sleeve, in order to close the latter on one side and finally obtain a pocket without bellows which it will suffice subsequently to close from the on the other side as before, after the content has been introduced, in this case a disc, so that it performs the protective function.
- These last two fixing steps are carried out by the same means as the first.
- the starting strip is a laminate comprising an outer layer 11 of relatively rigid thermal insulating material, here flame retardant, a partial intermediate layer 12 impermeable to radiation, and an inner layer 13 electrically conductive, here metallic, not or difficult to electrify.
- the inner layer one can for example consider a film or a coating layer of a metal or a metallic compound.
- the outer layer one can consider cardboard, reinforced paper, a layer of polyester, or another nonwoven support, for example.
- the lead of the internal layer is tinned, for the laminating of the paper that the applicant has produced using an adhesive without solvent or aqueous.
- the intermediate partial layer 12 one can proceed as follows.
- a layer for example, of aluminum from 5 nm to 65 nm (50 to 650 A) is deposited under vacuum.
- a protective film of varnish is deposited on the aluminum layer, depending on the desired pattern, here to obtain the only partial layer, and using a mask.
- a corrosive chemical for example caustic soda diluted to 10%, which attacks the metal layer in places not protected by the varnish. It is then washed with water, the varnish then also being removed if it is soluble. Finally, we dry. In places not covered by the metal layer, the outer layer becomes transparent. Note that this transparency can thus be obtained by electrolytic anodization of the metal layer, which, in this case, will retain its barrier characteristics in its entirety.
- the assembly of the laminate layers of the invention in this case glue, on the one hand, and the various folds of the strip of base, on the other hand, also participate in this screen function.
- the pouch of Figure 1 with its covering portion 3, 4, 5, is particularly well suited for the protection of its contents.
- this covering is not limitative of the invention, the latter in another embodiment, which may have two edges of strip simply fixed to one another ( Figure 3), the pouch of the invention can also be made from two strips of material.
- the laminate described above can therefore be used in the production of pouches intended to contain frozen foodstuffs. It can also be very suitable for making pockets not specially provided for this purpose, but which we want to be sure that they are well sealed. Indeed, the laminate described above allows effective control of the welds. If, in the case of bags for frozen products, the intermediate partial layer will be only about 5 nm thick, on the other hand, for the control of the welds, it will be preferable to increase this thickness up to at least 35 nm .
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Packages (AREA)
- Wrappers (AREA)
Description
La présente invention concerne un récipient ou emballage, étanche aux rayonnements au moins dans une zone d'étanchéité, et destiné à protéger son contenu contre ceux-ci, réalisé avec un stratifié comprenant au moins une couche imperméable à ces rayonnements.The present invention relates to a container or packaging, impervious to radiation at least in a sealing zone, and intended to protect its content against them, produced with a laminate comprising at least one layer impermeable to this radiation.
On connaît déjà, notamment par les brevets américain 3 845 316 et britannique 1 561 872, un récipient étanche aux radiations, en l'espèce aux rayons X, réalisé à partir d'un stratifié comprenant une feuille imperméable aux radiations, en l'occurrence une feuille de plomb ou d'aluminium, disposée entre deux feuilles de matière plastique, en l'occurrence de polyéthylène ou de polyester.Already known, in particular from the US patents 3,845,316 and British 1,561,872, a radiation-tight container, in this case X-rays, produced from a laminate comprising a sheet impermeable to radiation, in this case a sheet of lead or aluminum, placed between two sheets of plastic, in this case polyethylene or polyester.
Un tel récipient, ou emballage, ou couverture, peut être utilisé pour contenir des pellicules photographiques, des équipements électroniques, des supports d'enregistrement magnétiques, tels que des disques, des bandes ou des cassettes, etc., pour leur transport, leur expédition, leur archivage, et les protéger contre les rayonnements extérieurs électromagnétiques et ionisants, par exemple lors du passage aux contrôles de sécurité d'aéroport.Such a container, or packaging, or cover, can be used to contain photographic film, electronic equipment, magnetic recording media, such as discs, tapes or cassettes, etc., for their transport, shipment , their archiving, and protect them against external electromagnetic and ionizing radiation, for example when going through airport security checks.
Or cet emballage, formé comme précédemment décrit, présente de sérieux inconvénients et notamment le suivant. S'il constitue une barrière contre les rayonnements, d'ailleurs plus ou moins efficace, notamment dans le cas de films photographiques particulièrement sensibles, il favorise, à cause de la couche interne en matière plastique, et concomitamment à l'introduction dans le récipient de matériels ou dispositifs en matière plastique, de charges électrostatiques préjudiciables à la bonne conservation des informations de ces matériels et autres supports. Bref, un tel récipient, tout en proposant une solution à un problème, en crée néanmoins un autre.However, this packaging, formed as previously described, has serious drawbacks and in particular the following. If it constitutes a barrier against radiation, moreover more or less effective, in particular in the case of particularly sensitive photographic films, it favors, because of the internal layer of plastic material, and concomitantly with the introduction into the container. of plastic materials or devices, of electrostatic charges prejudicial to the good conservation of the information of these materials and other supports. In short, such a container, while offering a solution to one problem, nevertheless creates another.
On connait, par la demande de brevet britannique 2 060 488, un récipient pour matériels sensibles à la lumière réalisé dans un stratifié dont la couche interne est en polyéthylène de haute densité chargé au carbone, ce qui le rend moins électrisable et lui confère certaines propriétés antistatiques.British patent application 2,060,488 discloses a container for light-sensitive materials produced in a laminate, the inner layer of which is made of high density polyethylene loaded with carbon, which makes it less electrifiable and gives it certain properties. antistatic.
Toutefois, si ces propriétés antistatiques sont suffisantes pour éviter d'endommager des contenus tels que des films photographiques ou des papiers sensibles que l'invention de ce dernier document vise à protéger, il n'en est pas de même lorsque les contenus sont des équipements électroniques, disques, bandes ou cassettes informatiques.However, if these antistatic properties are sufficient to avoid damaging contents such as photographic films or sensitive papers which the invention of this last document aims to protect, it is not the same when the contents are equipment. electronic, computer discs, tapes or cassettes.
La présente invention vise donc à procurer un récipient traitant à la fois le problème de la protection contre les rayonnements et le problème des charges électrostatiques.The present invention therefore aims to provide a container treating both the problem of protection against radiation and the problem of electrostatic charges.
La présente invention concerne donc un récipient ou emballage, étanche aux rayonnements au moins dans une zone d'étanchéité et destiné à protéger son contenu contre ceux-ci, réalisé avec un stratifié comprenant, dans ladite zone d'étanchéité, au moins une couche imperméable à ces rayonnements, caractérisé par le fait que la couche interne du stratifié du récipient est une couche électriquement conductible et la couche imperméable ne s'étend que sur une zone dite de filtrage.The present invention therefore relates to a container or packaging, impervious to radiation at least in a sealing zone and intended to protect its content against them, produced with a laminate comprising, in said sealing zone, at least one impermeable layer. to these radiations, characterized in that the internal layer of the laminate of the container is an electrically conductive layer and the impermeable layer extends only over a so-called filtering zone.
Dans ce cas, le récipient de l'invention, pourvu d'une couche interne électriquement conductrice, et de préférence métallique, est véritablement non électrisable, et les contenus cités ci-dessus peuvent y être stockés sans risque.In this case, the container of the invention, provided with an electrically conductive internal layer, and preferably metallic, is truly non-electrifiable, and the contents mentioned above can be stored there without risk.
Au sens de la présente invention, on appelle matériau non électrisable, tout matériau non électrisable tant par influence que par contact, c'est-à-dire ne pouvant pas subir, ou pratiquement pas, d'électrisation par influence ou par contact.For the purposes of the present invention, the term “non-electrifiable material” means any material that is not electrifiable both by influence and by contact, that is to say that it cannot undergo, or practically not, electrification by influence or by contact.
En outre, la couche imperméable ne s'étendant que sur une zone de filtrage, elle ne protège que certaines parties du contenu du récipient en réalisant un filtrage local des rayonnements désirés. Ainsi, et outre les applications déjà évoquées, le récipient de l'invention trouve une autre application dans la décongélation et la cuisson par rayonnement micro-ondes de produits surgelés, de façon à exposer sélectivement directement et aussi par reflexion sur la zone étanche partielle certaines parties des produits et obtenir une cuisson plus intense de celles-ci, par exemple pour gratiner un plat cuisiné.In addition, the impermeable layer extending only over a filtering zone, it only protects certain parts of the contents of the container by carrying out local filtering of the desired radiation. Thus, and in addition to the applications already mentioned, the container of the invention finds another application in the thawing and cooking by microwave radiation of frozen products, so as to selectively expose directly and also by reflection on the partial sealed area certain parts of the products and obtain a more intense cooking of these, for example to brown a cooked dish.
Dans une forme de réalisation préférée du récipient de l'invention, le stratifié comprend une couche externe en matériau isolant thermique relativement rigide.In a preferred embodiment of the container of the invention, the laminate comprises an outer layer of relatively rigid thermal insulating material.
Dans ce cas, et cette couche externe étant en papier rigide ou en carton, outre le fait d'être pratiquement ignifugé, le récipient de l'invention présente l'avantage de pouvoir facilement recevoir, sur sa couche externe servant de support des informations commerciales, sans parler de son expédition postale qui se trouve également facilitée.In this case, and this external layer being made of rigid paper or cardboard, in addition to being practically fireproof, the container of the invention has the advantage of being able to easily receive, on its external layer serving as a support for commercial information. , not to mention its mailing which is also facilitated.
Avantageusement encore, les couches du stratifié du récipient de l'invention sont assemblées par une colle sans solvant, contrairement au récipient connu, ce qui élimine tout risque de migration de solvant non seulement sur le contenu global du récipient mais encore, et plus particulièrement, sur le liant des particules métalliques des supports magnétiques quand il y en a.Advantageously still, the layers of the laminate of the container of the invention are assembled by an adhesive without solvent, contrary to the known container, which eliminates any risk of migration of solvent not only on the overall content of the container but also, and more particularly, on the binder of metallic particles of magnetic supports when there are.
La présente invention sera mieux comprise à l'aide de la description suivante d'une forme de réalisation préférée du récipient de l'invention, en référence aux dessins annexés, sur lesquels:
- la figure 1 représente une vue en perspective schématique d'une pochette selon l'invention;
- la figure 2 représente une vue en coupe de la pochette de la figure 1, et
- la figure 3 représente une vue en coupe d'une deuxième pochette selon l'invention.
- Figure 1 shows a schematic perspective view of a pocket according to the invention;
- FIG. 2 represents a sectional view of the pouch of FIG. 1, and
- 3 shows a sectional view of a second pocket according to the invention.
Le stratifié, dans lequel on découpe une bande à partir de laquelle on forme, ou réalise, le récipient, ou l'emballage, ne sera décrit qu'après précisément le procédé de réalisation du récipient de l'invention, et plus particulièrement ici d'une pochette destinée à protéger un produit alimentaire surgelé.The laminate, in which a strip is cut from which one forms, or realizes, the container, or packaging, will only be described after precisely the process for producing the container of the invention, and more particularly here of a pouch intended to protect a frozen food product.
On part donc d'une bande rectangulaire découpée dans un stratifié. Sur la figure 1, et par souci de clarté, le stratifié n'est représenté dans son épaisseur que par un simple trait.We therefore start with a rectangular strip cut from a laminate. In FIG. 1, and for the sake of clarity, the laminate is only represented in its thickness by a single line.
On plie la bande le long de deux droites 1, 2 parallèles aux deux bords longitudinaux 3, 4 de la bande, et on replie vers l'extérieur, le long d'une troisième droite 5, parallèle aux mêmes bords et s'étendant entre le pli 2 et le bord 4, la portion de bande adjacente au bord 4 pour pouvoir rabattre la portion de bande comprise entre le bord 3 et le pli 1 sur la portion de bande comprise entre le bord 4 et le pli 5, les bords 3, 4 s'étendant alors l'un sur l'autre.The strip is folded along two straight lines 1, 2 parallel to the two longitudinal edges 3, 4 of the strip, and it is folded outwards along a third straight line 5, parallel to the same edges and extending between fold 2 and edge 4, the portion of strip adjacent to edge 4 to be able to fold down the portion of strip comprised between edge 3 and fold 1 on the portion of strip comprised between edge 4 and fold 5, edges 3 , 4 then extending one over the other.
On fixe l'une contre l'autre les portions internes adjacentes aux bords 3, 4, puis on fixe l'une contre l'autre les deux portions externes adjacentes au pli 5. Cette fixation peut s'effectuer par tout moyen connu, notamment par collage.The internal portions adjacent to the edges 3, 4 are fixed against each other, then the two external portions adjacent to the fold 5 are fixed against each other. This fixing can be carried out by any known means, in particular by collage.
On plie ensuite le manchon ainsi réalisé une première fois autour d'une première droite 6 perpendiculaire aux plis 1, 5 près d'un des bords 7 du manchon, et une deuxième fois autour d'une deuxième droite 8 parallèle à la première et éloignée de celle-ci d'une distance sensiblement égale ou légèrement supérieure à celle séparant la droite 6 du bord 7.Then fold the sleeve thus produced a first time around a first
On fixe ensuite cette double portion repliée 6, 7, 8 sur la portion adjacente au pli 8 du reste du manchon, pour fermer celui-ci d'un côté et obtenir finalement une pochette sans soufflet qu'il suffira ultérieurement de fermer de l'autre côté comme précédemment, après introduction de son contenu, en l'occurrence un disque, pour qu'elle assure la fonction de protection. Ces deux dernières étapes de fixation s'effectuent par le même moyen que la première.This double folded
On notera que si la couche interne du stratifié de la bande de départ s'y prête, les fixations décrites ci-dessus peuvent être aussi réalisées par soudage.It will be noted that if the internal layer of the laminate of the starting strip lends itself to it, the fastenings described above can also be carried out by welding.
Ayant décrit la formation de la pochette, abordons maintenant la structure de la bande de départ.Having described the formation of the cover, let us now discuss the structure of the starting strip.
La bande de départ est un stratifié comprenant une couche externe 11 en matériau isolant thermique relativement rigide, ici ignifugé, une couche intermédiaire partielle 12 imperméable aux rayonnements, et une couche interne 13 électriquement conductrice, ici métallique, non ou difficilement électrisable.The starting strip is a laminate comprising an outer layer 11 of relatively rigid thermal insulating material, here flame retardant, a partial
Pour la couche interne, on peut par exemple considérer un film ou une couche d'enduction d'un métal ou d'un composé métallique. Pour la couche externe, on peut considérer le carton, le papier armé, une couche de polyester, ou un autre support non tissé, par exemple.For the inner layer, one can for example consider a film or a coating layer of a metal or a metallic compound. For the outer layer, one can consider cardboard, reinforced paper, a layer of polyester, or another nonwoven support, for example.
A titre d'exemple, on peut prendre, pour la couche externe, du papier d'un poids surfacique comprise entre environ 60 g/m2 et 100 g/m2, et, pour la couche interne, un film de plomb d'épaisseur sensiblement comprise entre 50 et 100 um.For example, one can take, for the outer layer, paper with a surface weight of between about 60 g / m 2 and 100 g / m 2 , and, for the inner layer, a lead film of thickness substantially between 50 and 100 µm.
Avantageusement, le plomb de la couche interne est étamé, pour le contre-collage du papier que la demanderesse a réalisé à l'aide d'une colle sans solvant ou aqueuse. Pour l'obtention de la couche partielle intermédiaire 12, on peut procéder de la manière suivante.Advantageously, the lead of the internal layer is tinned, for the laminating of the paper that the applicant has produced using an adhesive without solvent or aqueous. To obtain the intermediate
Sur toute la couche externe, on dépose, sous vide, une couche, par exemple, d'aluminium de 5 nm à 65 nm (50 à 650 A). On dépose, selon le motif désiré, ici pour obtenir la seule couche partielle, et à l'aide d'un masque, un film de vernis protecteur sur la couche d'aluminium. On sèche. On pulvérise ensuite sur le vernis un produit chimique corrosif, par exemple de la soude caustique diluée à 10 %, qui attaque la couche métallique aux endroits non protégés par le vernis. On lave ensuite à l'eau, le vernis étant alors aussi enlevé s'il est soluble. Enfin, on sèche. Aux endroits non recouverts par la couche métallique, la couche externe devient transparente. On notera que cette transparence peut ainsi être obtenue par anodisation électrolythique de la couche métallique, qui, dans ce cas, conservera dans son intégralité ses caractéristiques de barrière.Over the entire outer layer, a layer, for example, of aluminum from 5 nm to 65 nm (50 to 650 A) is deposited under vacuum. A protective film of varnish is deposited on the aluminum layer, depending on the desired pattern, here to obtain the only partial layer, and using a mask. We dry. Then sprayed on the varnish a corrosive chemical, for example caustic soda diluted to 10%, which attacks the metal layer in places not protected by the varnish. It is then washed with water, the varnish then also being removed if it is soluble. Finally, we dry. In places not covered by the metal layer, the outer layer becomes transparent. Note that this transparency can thus be obtained by electrolytic anodization of the metal layer, which, in this case, will retain its barrier characteristics in its entirety.
Grâce à la rigidité de la couche externe, on évite les coupures ou le trop grand écrasement de la feuille intermédiaire lors du pliage et de la formation du récipient, qui diminuent l'épaisseur de cette feuille intermédiaire et réduisent l'efficacité protectrice du récipient.Thanks to the rigidity of the outer layer, cuts or excessive crushing of the intermediate sheet are avoided during folding and formation of the container, which reduce the thickness of this intermediate sheet and reduce the protective effectiveness of the container.
Grâce encore à la nature du matériau de la couche externe, les risques d'accumulation de charges électrostatiques à la surface extérieure du récipient, et les inconvénients qui en résultent, notamment au plan du stockage, sont considérablement réduits.Thanks again to the nature of the material of the external layer, the risks of accumulation of electrostatic charges on the external surface of the container, and the resulting disadvantages, in particular with regard to storage, are considerably reduced.
On notera encore que si la couche intermédiaire 12 assure une fonction d'écran aux rayonnements, l'assemblage des couches de stratifié de l'invention, en l'occurrence la colle, d'une part, et les divers pliages de la bande de base, d'autre part, participent également à cette fonction d'écran. A cet égard, la pochette de la figure 1, avec sa portion de recouvrement 3, 4, 5, est particulièrement bien appropriée pour la protection de son contenu. Néanmoins, ce recouvrement n'est pas limitatif de l'invention, celle-ci dans une autre forme de réalisation, pouvant présenter deux bords de bande simplement fixés l'un sur l'autre (figure 3), la pochette de l'invention pouvant aussi être réalisée à partir de deux bandes de matériaux.It will also be noted that if the
De façon générale toujours, on choisira des matériaux pour la réalisation du récipient de l'invention, au demeurant de taille quelconque, de manière que celui-ci présente un maximum de qualités parmi celles-ci:
- résistance mécanique à la perforation, au pliage, au frottement et aux variations de températures;
- résistance à l'eau, aux liquides et gaz agressifs acides ou basiques;
- résistance aux rayonnements électromagnétiques, photoniques; ionisants, ultraviolets, rayons X.
- mechanical resistance to perforation, bending, friction and temperature variations;
- resistance to water, acidic or basic aggressive liquids and gases;
- resistance to electromagnetic and photonic radiation; ionizing, ultraviolet, X-rays.
Sur la figure 3, les mêmes références 11-13 représentent les mêmes éléments que sur la figure 2. Dans la pochette de la figure 3, seule la zone contenant la couche intermédiaire 12 est étanche. Cette zone d'étanchéité est destinée à protéger certaines parties du contenu de récipients en réalisant un filtrage local des rayonnements désirés. De tels récipients trouvent par exemple leur application pour la décongélation et la cuisson par rayonnement micro-ondes de produits surgelés, de façon à exposer de façon sélective certaines parties du produit, afin d'obtenir une cuisson plus intense de certaines parties, par exemple pour gratiner un plat cuisiné, les rayonnements infrarouge émis avec les rayonnements micro-ondes étant en partie réfléchis sur cette couche intermédiaire 12, qui, par ailleurs, ne fait pas obstacle aux micro-ondes.In Figure 3, the same references 11-13 represent the same elements as in Figure 2. In the pocket of Figure 3, only the area containing the
Le stratifié décrit ci-dessus peut donc être utilisé dans la réalisation de pochettes destinées à contenir des denrées alimentaires surgelées. Il peut également bien convenir pour réaliser des pochettes non spécialement prévues à cet effet, mais dont on veut être sûr qu'elles soient bien hermétiques. En effet, le stratifié décrit ci-dessus permet un contrôle efficace des soudures. Si, dans le cas des pochettes pour produits surgelés, la couche partielle intermédiaire n'aura que 5 nm environ d'épaisseur, par contre, pour le contrôle des soudures, il sera préférable d'augmenter cette épaisseur jusqu'à au moins 35 nm.The laminate described above can therefore be used in the production of pouches intended to contain frozen foodstuffs. It can also be very suitable for making pockets not specially provided for this purpose, but which we want to be sure that they are well sealed. Indeed, the laminate described above allows effective control of the welds. If, in the case of bags for frozen products, the intermediate partial layer will be only about 5 nm thick, on the other hand, for the control of the welds, it will be preferable to increase this thickness up to at least 35 nm .
Claims (5)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8600766A FR2593149B1 (en) | 1986-01-21 | 1986-01-21 | CONTAINER WATERPROOF. |
| FR8600766 | 1986-01-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0234985A1 EP0234985A1 (en) | 1987-09-02 |
| EP0234985B1 true EP0234985B1 (en) | 1989-10-25 |
Family
ID=9331306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19870400126 Expired EP0234985B1 (en) | 1986-01-21 | 1987-01-20 | Radiation-proof container |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0234985B1 (en) |
| DE (1) | DE3760868D1 (en) |
| ES (1) | ES2012085B3 (en) |
| FR (1) | FR2593149B1 (en) |
| GR (1) | GR3000320T3 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0350660A3 (en) * | 1988-07-13 | 1992-01-02 | Societe Des Produits Nestle S.A. | Composite sheet stock for microwave heating and receptacle |
| FR2718384B1 (en) * | 1994-04-06 | 1996-06-21 | Plastic Omnium Cie | Method for producing a plastic case comprising an electromagnetic insulation of its interior cavity. |
| DE19603268A1 (en) * | 1996-01-30 | 1997-07-31 | Riedel Manfred Dipl Ing Fh | Conductive packaging for electronic components |
| JP6444870B2 (en) | 2012-08-24 | 2018-12-26 | グラフィック パッケージング インターナショナル エルエルシー | Carton, blank or substrate material |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5852118Y2 (en) * | 1976-12-25 | 1983-11-28 | 三井化学株式会社 | Composite plastic film for packaging materials |
| JPS5632139A (en) * | 1979-08-23 | 1981-04-01 | Fuji Photo Film Co Ltd | Packing material for photosensitive material |
-
1986
- 1986-01-21 FR FR8600766A patent/FR2593149B1/en not_active Expired
-
1987
- 1987-01-20 EP EP19870400126 patent/EP0234985B1/en not_active Expired
- 1987-01-20 DE DE8787400126T patent/DE3760868D1/en not_active Expired
- 1987-01-20 ES ES87400126T patent/ES2012085B3/en not_active Expired - Lifetime
-
1990
- 1990-01-24 GR GR90400041T patent/GR3000320T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP0234985A1 (en) | 1987-09-02 |
| ES2012085B3 (en) | 1990-03-01 |
| DE3760868D1 (en) | 1989-11-30 |
| FR2593149B1 (en) | 1989-02-03 |
| GR3000320T3 (en) | 1991-06-07 |
| FR2593149A1 (en) | 1987-07-24 |
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