EP0915013A1 - Procédé pour l'operculage de récipients, feuille d'operculage pour la mise en oeuvre de ce procédé et produit industriel obtenu - Google Patents
Procédé pour l'operculage de récipients, feuille d'operculage pour la mise en oeuvre de ce procédé et produit industriel obtenu Download PDFInfo
- Publication number
- EP0915013A1 EP0915013A1 EP98402767A EP98402767A EP0915013A1 EP 0915013 A1 EP0915013 A1 EP 0915013A1 EP 98402767 A EP98402767 A EP 98402767A EP 98402767 A EP98402767 A EP 98402767A EP 0915013 A1 EP0915013 A1 EP 0915013A1
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- EP
- European Patent Office
- Prior art keywords
- adhesive
- sheet
- films
- film
- container
- 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.)
- Granted
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Classifications
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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
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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
- B65D51/00—Closures not otherwise provided for
- B65D51/16—Closures not otherwise provided for with means for venting air or gas
- B65D51/1633—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element
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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
- B65D2205/00—Venting means
Definitions
- Containers have been known for a long time with a rim on which a sheet lidding is sealed, whether this sheet is multilayer or not. Such a structure presents no major difficulty when the container is filled with a product at constant temperature.
- Cooking food before final packaging poses problems complex technical and economic. Cooking must be carried out under conditions very strict hygiene because it is absolutely necessary to avoid any bacterial contamination after cooking, and if the skilled person knows how to perform a conditioning aseptic, it is at the cost of very elaborate and very expensive installations.
- the container and its lid are sterilized at the same time as the food, by the cooking operation itself, which has the advantage of simplicity.
- valves or valves, as simple as possible which on the one hand ensure the exit to the atmosphere of the gases under pressure inside the container, and on the other hand the return to a filling complete as soon as internal pressure returns to normal.
- thermo-fuse which opens when the temperature rises and then closes during cooling, by restoring the tightness of the tray and the protection antibacterial that this seal ensures.
- Patent FR-A-2,629,060 proposes to provide trays with a real non-return valve movable between two positions corresponding respectively to the opening at the atmosphere of the interior of the tray and its hermetic closure.
- the present invention provides a new solution to the problem of the sealing of containers for subjecting them to temperature and pressure differences, while using simple, proven and economical manufacturing methods.
- the subject of the invention is also a sheet of synthetic material for the sealing of containers such as pots, trays and the like having a rim formed of two overlapping films, characterized in that one of the films has multiple small perforations at a density between 100 and 10,000 perforations per square decimetre, and that a so-called "junction" adhesive is interposed between the two films on only part of their surface, and leaves areas without joint adhesive, which constitute a network of several branches juxtaposed with at least one channel, the outlet is located either on at least one of the two longitudinal edges of the films, or at least one of their transverse ends.
- the invention also relates to an industrial product consisting of a container filled with content, having a rim and closed by means of a cover which is sealed in a sealed manner on the entire surface of the rim and which consists of a sheet of synthetic material conforms to the definition above, having areas left free and constituting a network of several branches juxtaposed with at least one channel having at least one outlet to the atmosphere through the edge, or one of the edges, of the closed container.
- Figure 1 is a schematic perspective view which illustrates the general implementation of the process according to the invention.
- Figure 2 is a schematic perspective view showing the making of a product intermediate according to the invention, intended for the sealing of containers.
- Figure 3 is a partial schematic sectional view illustrating the evacuation to the atmosphere pressurized gases contained in the container, after sealing.
- Figures 4, 5 and 6 are schematic elevational views showing three phases of the sealing of a container by means of the intermediate product.
- Figures 7, 8 and 9 are schematic plan views, corresponding to the views in elevation of figures 4, 5 and 6.
- Figures 10 to 15 are schematic views showing different possible arrangements for areas without joint adhesive and forming a gas evacuation channel under pressure.
- Figures 16 and 17 are two schematic views each representing a fragment of a sheet according to the invention, substantially in full size, and showing dimensions real for the openings and their density, as well as for the channels.
- FIG. 18 is a schematic view illustrating an embodiment of the invention according to which one of the two films is formed of two layers of different compositions.
- the method according to the invention is intended to the sealing of containers A, of the known type comprising a body B and a rim continuous device C.
- the container A is an oblong tray but it can be containers of other shapes, in particular jars whose body has a circular section and a frustoconical profile, the rim then being itself circular.
- lidded containers are jars with flat faces, connected by curves, and the rim of which has a substantially square outline with rounded angles.
- the sealing must, of course, be carried out after filling the container with a content D which will be assumed here to be a food.
- the cover must be applied over the entire surface of the edge C and be fixed there by means of a adhesive.
- This cover is constituted by a sheet composed of two films respectively internal 1 and external 2.
- the internal film 1 is previously perforated to be crossed by multiple small perforations or "microperforations" 3, in order to be permeable to gases.
- the outer film 2 is continuous and waterproof.
- the two films 1 and 2 must be joined together, an operation which can be carried out at the same time as the internal film 1 is fixed on the edge C or beforehand but, in any case, this assembly must leave free areas, so that an adhesive interposed between them, called “junction”, should only be present on a part only from the surface of films 1 and 2.
- the two films 1 and 2 are joined together only at the places where there is junction tape to determine a network of channels that open out on the edges of the sheet, between the two films 1 and 2.
- microperforations 3 we can be certain that some of they will be in the canals, without it being necessary to carry out any location whatever but furthermore, due to their high density, these microperforations have, together, a large total passage section, while being distributed over all the surface of the film 1.
- the atmosphere inside tray A can communicate with the external atmosphere, provided that it is brought to a pressure sufficient to remove the films 1 and 2 of one another according to the channels determined by the absence of adhesive of junction.
- this sheet is cut, in particular by a cutting blade symbolized in E in FIG. 3, as close as possible to the contour of said rim C, in particular by leaving a tongue (not shown) facilitating its subsequent removal by the user, so that he can access content D.
- the fixing of the sheet on the rim C can be carried out by any means known, in particular by means of a sealing adhesive, which can also be separate from film 1 and edge C, or be previously applied to one or to the other.
- the process for developing sheet 1 then advantageously provides for the establishment of the adhesive 4 on the film 1 first, then the simultaneous perforation of the sheet 1 and the adhesive 4, then the fixing of the films 1 and 2 to one another by the joining adhesive 5, this not necessarily being perforated because it is discontinuous.
- the joining adhesive 5 is arranged according to squares aligned and separated from each other by zones 6 and 7 stripped of adhesive and arranged in two perpendicular directions and forming a relatively dense network.
- the film 2 is then superimposed on the sheet 1 provided with the adhesive 4.
- the two adhesives 4 and 5 can have the same physicochemical characteristics, since the same single heating operation must have the same effects on the two adhesives.
- Zones 6 and 7 without joint adhesive 5 create as many channels 8 and 9 ( Figure 3) between the two films 1 and 2.
- the two films 1 and 2 are strictly applied, one on the other and the content D is perfectly preserved from any contamination from the external atmosphere, because the external film 2 is waterproof and continuous and because the internal film 1 is itself fixed to the rim C in a sealed and continuous manner.
- zones 6 and 7 extend continuously to the edges of the film 1 from the application of the joining adhesive 5 and remain after cutting the entire sheet, both in the transverse direction (zones 6) and in the longitudinal direction (zones 7).
- the user can remove the cover to access content D, without fear a violent effect due to the internal overpressure, this being automatically eliminated by gas evacuation via channels 8 and 9.
- Figures 4 to 9 illustrate another embodiment of the method according to the invention. Indeed, here we first proceed to the complete elaboration of the bi-film sheet, in combining the two films 1 and 2 with the joining adhesive 5, in order to obtain a set unitary forming a complete industrial product, capable of being sold, delivered, stored and used up to the sealing, without prior operation for the company which carries out the filling of container A and its sealing.
- the sealing adhesive 4 may or may not be associated with the sheet thus produced, according to the respective characteristics of edge C and film 1.
- this sealing adhesive 4 is effectively applied to the face outside of the sheet, i.e. the outside face of the film 1 opposite the film 2, so that the complete industrial product is immediately available for the sealing by gluing of the sheet on the edge C, regardless of the material used to make container A.
- FIGS. 4 and 7 we can see a coil 10 formed by the winding of numerous turns a sheet comprising on the one hand the two films 1 and 2 and the joining adhesive 5 after activation so that the two films are fixed to each other, and on the other hand the sealing adhesive 4.
- This sheet is unwound from the reel 10 and is applied stretched over a container A filled with its content D, then this set is placed next to a mechanism known as self comprising on the one hand an upper punch 11, carrying a peripheral failure 12 of shapes and dimensions adapted to those of the flange C and comprising means for heating and on the other hand an anvil 13.
- the container A is placed between the punch 11 and the anvil 13, which are then approached from each other, in order to strongly pinch the sheet between the upper punch 11 and the rim C supported by the anvil 13, which has the effect of activating the sealing adhesive 4 and cause the sheet to be fixed at the edge C.
- the sheet is cut as close as possible to the edge of the rim C, thanks to a cutting element 14 provided on the periphery of purlin 12.
- activation of the lidding adhesive 4 occurs when the junction adhesive 5 has already been activated since the two films 1 and 2 are fixed to each other.
- the activation of the sealing adhesive 4 is done through the entire sheet, because that the purlin 12 and the anvil 13 are located on either side of the rim C covered with the sheet, it is necessary to avoid that the heating due to the action of the purlin 12 modifies the adhesive of junction 5 which is at the origin of the existence of channels 8 and 9.
- the two adhesives 4 and 5 have characteristics different physico-chemical, so that during the sealing, the adhesive 4 is activated and that the joining adhesive 5, already used, remains intact.
- the joining adhesive 5 a material obtained by polycondensation
- the sealing adhesive 4 is a material obtained by polymerization
- the arrangement of the joining adhesive 5 can be done according to multiple variants, such as examples are shown in Figures 10 to 17.
- the sheet must fulfill its role of evacuating internal gases under pressure, it is necessary to that it can be applied "per kilometer" above the containers to be sealed in series, it it is necessary and sufficient that the inner sheet 1 is crossed with multiple perforations and that the outer sheet 2 is only partially adhered to the sheet 1, in order to obtain no not a single isolated channel (and therefore to be identified) but a network of several channels, or a network of several branches of a single channel.
- film 1 has been given a circular shape, not that it constitutes a limit of the application of the invention to containers or pots having this section, but as representing any portion considered on film 1.
- the joining adhesive 5 leaves parallel rectilinear zones 61, oriented longitudinally with respect to the film 1.
- the channels resulting from the existence of the zones 61 necessarily open out at the ends of the film 1 perpendicular to its axis, and perhaps on one or both edges parallel to this axis, if, as shown in 62 on the right side of the Figure 10, the sheet is cut along the rim of the container, directly above one of the channels.
- the zones 63 are still rectilinear and parallel, but oriented obliquely to the axis of the film 1.
- rectilinear and parallel zones 64 and 65 respectively are arranged according to two sets perpendicular to each other to constitute the entire network, the zones 64 being parallel to the axis of the film while zones 65 are perpendicular to said axis.
- rectilinear zones 66 and 67 are also arranged in two sets perpendicular, but here, zones 66 and 67 are oblique to the axis of the film.
- zones 68 are arranged in parallel but have a wavy path and no longer straight. They are shown as extending parallel to the axis of the film 1, but they could also be oblique.
- FIG. 15 the particular case is shown according to which there exists only one zone deprived of adhesive junction, but it has a spiral path, thanks to which the only channel to which it will give birth will have several branches 69 a , 69 b , etc., which is equivalent, after cutting, to several distinct channels.
- the channels 8 and 9 allow the evacuation automatic pressure gases and vapors existing inside the sealed container A.
- this pressure decreases or even disappears completely, the channels close automatically thanks to the intrinsic elasticity of films 1 and 2 or, in any case, of the upper 2 film.
- the channels are even hermetically closed and oppose at any entry of outside air into the interior of the container, as a result of the vacuum which prevails in container A.
- a first operation may be planned at the place of packaging for sterilization of containers and their contents.
- a second operation can take place at the user to warm the content, in particular when it comes to food.
- a sealing adhesive (not shown) can be provided on zones 6 and 7 of which the action, that is to say the adhesive power, is canceled at a markedly higher temperature than that of the junction adhesive 5, so that it is neither activated nor during the fixing of the films 1 and 2 between them or when sealing with adhesive 4.
- Sealing adhesive ensures that there will be no communication between the interior of container A and the outside, during various handling and storage.
- It can be an adhesive sensitive to temperature and / or humidity.
- adhesive such as applied to paper articles and sheets repositionable, which easily lets the two films 1 and 2 separate when the container A is subjected to heating and / or immersion and which, in any case, found in contact with the gases and vapors given off by the content D, while it reconstitutes the bonding of these same films 1 and 2 when the internal pressure allows them to reconnect. This effect is even more marked, and sealing is ensured, when the internal pressure becomes lower than atmospheric pressure because the depression which results causes a real plating of films 1 and 2 against each other.
- the sealing adhesive can also be chosen to melt at a certain temperature. In this case, it must be chosen to be easily neutralized when raising temperature from sterilization and / or reheating of the contents D, so that the exhaust gas and vapor channels are quickly and largely cleared before the internal overpressure reaches a value dangerous for the integrity of the container.
- the sealing adhesive has the advantage of compensating, if necessary, the small gaps and / or lack of adhesion of films 1 and 2, in particular from tiny irregularities created during the formation of microperforations.
- Microperforations can also be obtained with cold needles, but then we acts in a way by tearing, which leaves tiny irregularities but very visible under a microscope, having effects equivalent to those of the bead described above.
- the density of microperforations between 100 and 10,000 perforations per decimeter square, has been shown to provide excellent results between 200 and 2,000 perforations per square decimetre in some cases, and between 500 and 1,200 perforations per square decimetre in other cases.
- current research is to prefer an increase in the density of the perforations reaching 10,000 perforations by square decimetre and a miniaturization of the perforations, as this leads to a excellent distribution of pressurized gas and vapor exhaust vents.
- Figures 16 and 17 are approximately full-scale views illustrating very clearly schematic the appearance of a fraction of the film 1 according to the invention, being specified that in reality the film is transparent and the microperforations practically invisible since they correspond to the material removed.
- the channels have an undulating course and are parallel, having outlets located only at the transverse ends of the sheet, and therefore of the container sealed.
- microperforations can be separated from each other by equal distances in orthogonal directions, or on the contrary be separated by different distances.
- the channels should rather be narrow and numerous than broad and rare, especially when the content is heterogeneous.
- Channel density i.e. the number of channels per linear decimetre considered transversely to said channels, is advantageously between 5 and 15.
- the invention provides for a very large number of very small diameter perforations as well that a significant number of narrow channels, the tightness of the attachment of the two films 1 and 2 to each other is crucial, as well as, of course, the sealing of the sealing of film 1 on edge C.
- the film 1 is itself formed of two layers 1a and 1b fixed to each other according to their entire surface and of different but compatible composition.
- a double seal is thus obtained due to a particularly well-suited bonding of a part at the sealing of the sheet on the container A, and on the other hand films 1 and 2 between they.
- the constituent material of the container A (and therefore of its rim C) is polypropylene
- the constituent material of the container A is polypropylene
- the layer 1 b is made of polyethylene terephthalate (“PET”), the film 2 also being made of PET.
- a polyethylene terephthalate film 25 ⁇ thick is coated on one of its faces of a universal heat-sealing lacquer and constitutes the internal film 1.
- This film is pierced with microperforations 3 using a cold needle microperforator, in a configuration where the microperforations are spaced 5 mm in the direction transverse of the sheet and 5 mm in the longitudinal direction, offset by a distance of 2.5 mm per row to give a square pattern.
- a film also made of polyethylene terephthalate but only 12 ⁇ thick constitutes the external film 2.
- These two films 1 and 2 are laminated on a lamination line in a solvent medium with interposition of a two-component adhesive.
- a screened cylinder allowing the deposition of the glue includes peripheral grooves 2.5 mm wide, equidistant from 5 mm.
- the sheet thus “complexed” in width of 600 mm is used on a machine for packaging of the type known as "Fill Seal” for sealing trays made of crystallized polyethylene terephthalate (“CPET”), with a circular circumference of 95 mm diameter.
- CPET crystallized polyethylene terephthalate
- the equipment allows to seal two rows of trays, over a width of 190 mm.
- the filling, sealing and cutting operations are carried out on the machine.
- the sealed trays are placed in a steam oven where they undergo a temperature of 90 ° C for 35 minutes.
- the packaged products are cooked properly and the container has not undergone any deformation.
- the sealed trays are placed in a traditional oven where they undergo a temperature of 150 ° C for 90 minutes.
- the packaged products are cooked properly and the container has not undergone any deformation.
- the sheet is founded by the same films, as in Example 1.
- the screened cylinder which allows the glue to be deposited has grooves in the "machine direction" (longitudinally with respect to the movement of the films) and in the transverse direction, the grooves 2.5 mm wide and 5 mm apart.
- the sheet is formed by the same films, as in Examples 1 and 2.
- the screened cylinder which allows the deposition of glue has spiral grooves.
- the sheet is formed by the same films, as in Examples 1, 2 and 3.
- the screened cylinder which allows the deposit of glue comprises sinuous grooves.
- the outer film 2 is full, that is to say continuous and waterproof. It can be simple, as described, or formed from several assembled layers.
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Abstract
Description
- la cuisson de l'aliment avant son conditionnement dans un récipient hermétiquement operculé,
- la cuisson après conditionnement dans le récipient.
- on transperce la pellicule interne de multiples petites perforations selon une densité comprise entre 100 et 10 000 perforations par décimètre carré,
- on dispose un adhésif dit "de jonction" sur l'une quelconque des deux faces en regard des pellicules,
- on superpose les deux pellicules,
- on assemble ces deux pellicules au moyen de l'adhésif de jonction situé entre les deux pellicules et disposé sur une partie seulement de la surface des pellicules, afin de laisser subsister des zones sans adhésif de jonction, qui constituent un réseau de plusieurs branches juxtaposées d'au moins un canal dont le débouché se situe sur au moins un bord de la feuille, bord qui, s'il est unique, est soit longitudinal avant découpe de la feuille, soit transversal après découpe,
- on place cette feuille tendue au-dessus du récipient rempli en mettant en contact la pellicule interne et le rebord, avec interposition d'un adhésif d'operculage continu,
- on fixe la feuille au rebord en activant l'adhésif d'operculage à travers la pellicule externe par des moyens qui n'agissent que sur ladite pellicule interne, afin de laisser libre le passage de chaque canal même après fixation au rebord et après découpe.
Claims (24)
- Procédé pour l'operculage de récipients tels que pots, barquettes et analogues, devant contenir un produit destiné à être chauffé dans le récipient lui-même, procédé selon lequel on fabrique un récipient présentant un rebord, puis on le remplit de son contenu, puis on place sur le rebord une feuille en matière synthétique à au moins deux couches dont l'une est percée de trous et assemblées l'une contre l'autre sur une fraction seulement de leurs surface afin de créer entre elles au moins un canal, feuille que l'on tend au-dessus du récipient rempli, puis on fixe cette feuille au rebord de manière étanche, puis on découpe la feuille au plus près du contour extérieur dudit rebord, pour constituer ainsi un opercule scellé, caractérisé en ce que l'on réalise au préalable une feuille de longueur indéfinie au moyen d'au moins deux pellicules dites respectivement "interne" (1) et "externe" (2), et en ce que, dans un ordre quelconque :on transperce la pellicule interne (1) de multiples petites perforations (3) selon une densité comprise entre 100 et 10 000 perforations (3) par décimètre carré,on dispose un adhésif dit "de jonction" (5) sur l'une quelconque des deux faces en regard des pellicules (1-2),on superpose les deux pellicules (1 et 2),on assemble ces deux pellicules (1 et 2) au moyen de l'adhésif de jonction (5) situé entre les deux pellicules (1 et 2) et disposé sur une partie seulement de la surface des pellicules, afin de laisser subsister des zones (6-7) sans adhésif de jonction (5), qui constituent un réseau de plusieurs branches juxtaposées d'au moins un canal dont le débouché se situe sur au moins un bord de la feuille, bord qui, s'il est unique, est soit longitudinal avant découpe de la feuille, soit transversal après découpe,on place cette feuille tendue au-dessus du récipient (A) rempli en mettant en contact la pellicule interne (1) et le rebord (C), avec interposition d'un adhésif d'operculage (4) continu,on fixe la feuille au rebord (C) en activant l'adhésif d'operculage (4) à travers la pellicule externe (2) par des moyens qui n'agissent que sur ladite pellicule interne (1), afin de laisser libre le passage de chaque canal même après fixation au rebord (C) et après découpe.
- Procédé selon la revendication 1, caractérisé en ce que l'on dispose l'adhésif d'operculage continu (4) sur la pellicule interne (1), avant son transpercement.
- Procédé selon la revendication 1, caractérisé en ce que l'on assemble les deux pellicules (1 et 2) entre elles avant de procéder à la fixation de la feuille qui en résulte sur le rebord (C) d'un récipient (A), afin de constituer un ensemble unitaire susceptible d'être stocké, notamment en bobine (10), et livré en l'état en vue d'un operculage ultérieur.
- Procédé selon la revendication 1, caractérisé en ce que l'on superpose les deux pellicules (1 et 2) dont l'une porte l'adhésif de jonction (5), que l'on dispose ces deux pellicules (1 et 2) superposées au-dessus du récipient (A) rempli et que l'on active en même temps l'adhésif de jonction (5) et l'adhésif d'operculage (4) afin d'obtenir simultanément l'assemblage des deux pellicules (1 et 2) entre elles et la fixation étanche de la feuille tout entière sur le rebord (C).
- Procédé selon la revendication 1, caractérisé en ce que l'adhésif d'operculage (4) a un point de fusion nettement inférieur à celui de l'adhésif de jonction (5).
- Procédé selon la revendication 1, caractérisé en ce que l'adhésif de jonction (5) est de nature différente de celle de l'adhésif d'operculage (4) afin d'être insensible à la mise en oeuvre de celui-ci.
- Procédé selon la revendication 6, caractérisé en ce que l'adhésif de jonction (5) est obtenu par polycondensation, tandis que l'adhésif d'operculage (4) est obtenu par polymérisation.
- Procédé selon la revendication 1, caractérisé en ce que l'on applique sur l'une au moins des pellicules (1 et 2) un adhésif d'étanchéité dans certaines au moins des branches juxtaposées d'au moins un canal (6, 7, 61, 63, 64-65, 66-67, 68, 69) et dont l'action s'annule à une température supérieure à la température ambiante et inférieure à la température à laquelle le contenu doit être chauffé
- Procédé selon la revendication 1, caractérisé en ce que l'on constitue la pellicule perforée (1) au moyen de deux couches (1a et 1b) que l'on contrecolle par l'intégralité de leurs surfaces en regard, celle (1a) devant être au contact du rebord (C) du récipient (A) ayant une composition qui la rend particulièrement apte à sa fixation étanche audit rebord (C), tandis que celle (1b) devant être au contact de la pellicule étanche (2) a une composition qui la rend particulièrement apte à sa fixation à ladite pellicule étanche (2) au moyen de l'adhésif de jonction (5).
- Procédé selon la revendication 9, caractérisé en ce que le rebord (C) du récipient (A) étant en polypropylène, la couche (1a) devant être à son contact est en propylène cast, tandis que la couche (1b) fixée à la précédente (1a) est en polyéthylène téréphtalate, ainsi que la pellicule étanche (2).
- Feuille en matière synthétique pour l'operculage de récipients (A) tels que pots, barquettes et analogues présentant un rebord (C), formée de deux pellicules superposées (1 et 2), caractérisée en ce que l'une (1) des pellicules (1-2) présente de multiples petites perforations (3) selon une densité comprise entre 100 et 10 000 perforations (3) par décimètre carré, et qu'un adhésif dit "de jonction" (5) est interposé entre les deux pellicules (1 et 2) sur une partie seulement de leur surface, et laisse subsister des zones (6, 7, 61, 63, 64-65, 66-67, 68, 69) sans adhésif de jonction (5), qui constituent un réseau de plusieurs branches juxtaposées d'au moins un canal (6, 7, 61, 63, 64-65, 66-67, 68, 69) dont le débouché se situe, soit sur au moins l'un des deux bords longitudinaux des pellicules (1 et 2), soit à l'une au moins de leurs extrémités transversales.
- Feuille selon la revendication 11, caractérisée en ce que la densité des perforations (3) est de 200 à 2000 perforations (3) par décimètre carré.
- Feuille selon la revendication 12, caractérisée en ce que la densité des perforations (3) est de 500 à 1200 perforations (3) par décimètre carré.
- Feuille selon la revendication 11, caractérisée en ce que la distance qui sépare deux perforations (3) est la même dans deux directions orthogonales du plan.
- Feuille selon la revendication 11, caractérisée en ce que la distance qui sépare deux perforations (3) est différente dans deux directions orthogonales du plan.
- Feuille selon la revendication 11, caractérisée en ce que la largeur de chaque branche juxtaposée d'au moins un canal (6, 7, 61, 63, 64-65, 66-67, 68, 69) est comprise entre 2 et 5 millimètres.
- Feuille selon la revendication 16, caractérisée en ce que la largeur de chacune des branches juxtaposées d'au moins un canal (6, 7, 61, 63, 64-65, 66-67, 68, 69) est comprise entre 3 et 3,5 millimètres.
- Feuille selon la revendication 11, caractérisée en ce que le nombre de branches juxtaposées d'au moins un canal (6, 7, 61, 63, 64-65, 66-67, 68, 69) est de 5 à 15 par décimètre.
- Feuille selon la revendication 11, caractérisée en ce que certaines au moins des branches juxtaposées d'au moins un canal (6, 7, 61, 63, 64-65, 66-67, 68, 69) contient un adhésif d'étanchéité.
- Feuille selon la revendication 11, caractérisée en ce que la pellicule perforée (1) est de type bicouche, c'est-à-dire formée par contrecollage pleine face de deux couches (1a et 1b).
- Feuille selon la revendication 11, caractérisée en ce que les deux pellicules (1 et 2) sont assemblées par l'adhésif de jonction (5), afin de constituer un ensemble unitaire susceptible d'être stocké, notamment en bobine (10), et livré en l'état en vue d'un operculage ultérieur.
- Feuille selon la revendication 11, caractérisée en ce que la pellicule (1) qui présente de multiples petites perforations (3) porte un adhésif continu (4) sur sa face extérieure, c'est-à-dire sur sa face qui est opposée à l'autre pellicule (2).
- Feuille selon la revendication 10, caractérisée en ce que la pellicule (1) qui porte un adhésif continu (4) et l'autre pellicule (2) sont assemblées par l'adhésif de jonction (5), afin de constituer un ensemble unitaire susceptible d'être stocké, notamment en bobine (10), livré en l'état en vue d'un operculage ultérieur.
- Produit industriel constitué par un récipient (A) garni d'un contenu (D), présentant un rebord (C) et fenné au moyen d'un opercule qui est scellé de manière étanche sur toute la surface du rebord (C) et qui est constitué par une feuille en matière synthétique conforme à la revendication 11, présentant des zones (6, 7, 61, 63, 64-65, 66-67, 68, 69) laissées libres et constituant un réseau de plusieurs branches juxtaposées d'au moins un canal ayant au moins un débouché à l'atmosphère par le bord, ou l'un des bords, du récipient (A) fermé.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9714016 | 1997-11-07 | ||
FR9714016 | 1997-11-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0915013A1 true EP0915013A1 (fr) | 1999-05-12 |
EP0915013B1 EP0915013B1 (fr) | 2005-12-14 |
Family
ID=9513155
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98402767A Expired - Lifetime EP0915013B1 (fr) | 1997-11-07 | 1998-11-06 | Procédé pour l'operculage de récipients, feuille d'operculage pour la mise en oeuvre de ce procédé et produit industriel obtenu |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0915013B1 (fr) |
AT (1) | ATE312757T1 (fr) |
DE (1) | DE69832771D1 (fr) |
DK (1) | DK0915013T3 (fr) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2367527A (en) * | 2001-07-23 | 2002-04-10 | Abdul Aziz Okhai | Packaging film |
WO2002051716A1 (fr) * | 2000-12-22 | 2002-07-04 | Robert Jan Colenbrander | Emballage de produits alimentaires rechauffable pourvu de moyens de ventilation |
EP1422163A1 (fr) * | 2002-11-22 | 2004-05-26 | Amcor Flexibles Europe A/S | Conditionnement pour aliments à réchauffer dans un four |
WO2004098317A1 (fr) * | 2003-05-08 | 2004-11-18 | Agroinnova, S.L. | Procede de preparation et de conditionnement d'un produit alimentaire frais destine a conserver et a cuire a la vapeur ledit produit et conditionnement correspondant |
EP3575084A1 (fr) * | 2018-06-01 | 2019-12-04 | Amcor Europe Group Management | Bande de film d'étanchéité pour plateaux |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2870954A (en) | 1956-05-15 | 1959-01-27 | Reynolds Metals Co | Vacuum package |
US3435948A (en) * | 1966-08-08 | 1969-04-01 | Ethicon Inc | Gas sterilizable package |
DE2331862A1 (de) | 1973-06-22 | 1975-01-16 | Hesser Ag Maschf | Ventil zur begrenzung des innendrucks in zur aufnahme von gas abgebenden guetern bestimmten verpackungsbehaeltern sowie verfahren zum herstellen des ventils |
EP0160978A2 (fr) * | 1984-05-07 | 1985-11-13 | Nyffeler, Corti AG | Membrane de fermeture pour un récipient dont le contenu dégage des gaz |
DE3521373A1 (de) | 1985-06-14 | 1986-12-18 | Heinrich Hermann Gmbh + Co, 7000 Stuttgart | Ueberdruckventil fuer einen verpackungsbehaelter, insbesondere aus flexiblem werkstoff und dessen herstellungsverfahren |
FR2629060A1 (fr) | 1988-03-28 | 1989-09-29 | Cook In Pack Sa | Dispositif d'obturation automatique par effet thermique de conditionnement pour preparations alimentaires a consommations differees |
US4884694A (en) * | 1985-08-27 | 1989-12-05 | Sengewald Karl H | Gas-sterilizable package, cover of and arrangement for producing the same |
EP0490558A1 (fr) * | 1990-12-12 | 1992-06-17 | Sidlaw Flexible Packaging Limited | Emballage pour un produit alimentaire pouvant être cuit dans son propre emballage |
EP0531176A1 (fr) | 1991-09-06 | 1993-03-10 | Unilever Plc | Matériau d'emballage |
-
1998
- 1998-11-06 AT AT98402767T patent/ATE312757T1/de not_active IP Right Cessation
- 1998-11-06 DE DE69832771T patent/DE69832771D1/de not_active Expired - Lifetime
- 1998-11-06 EP EP98402767A patent/EP0915013B1/fr not_active Expired - Lifetime
- 1998-11-06 DK DK98402767T patent/DK0915013T3/da active
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2870954A (en) | 1956-05-15 | 1959-01-27 | Reynolds Metals Co | Vacuum package |
US3435948A (en) * | 1966-08-08 | 1969-04-01 | Ethicon Inc | Gas sterilizable package |
DE2331862A1 (de) | 1973-06-22 | 1975-01-16 | Hesser Ag Maschf | Ventil zur begrenzung des innendrucks in zur aufnahme von gas abgebenden guetern bestimmten verpackungsbehaeltern sowie verfahren zum herstellen des ventils |
EP0160978A2 (fr) * | 1984-05-07 | 1985-11-13 | Nyffeler, Corti AG | Membrane de fermeture pour un récipient dont le contenu dégage des gaz |
DE3521373A1 (de) | 1985-06-14 | 1986-12-18 | Heinrich Hermann Gmbh + Co, 7000 Stuttgart | Ueberdruckventil fuer einen verpackungsbehaelter, insbesondere aus flexiblem werkstoff und dessen herstellungsverfahren |
US4884694A (en) * | 1985-08-27 | 1989-12-05 | Sengewald Karl H | Gas-sterilizable package, cover of and arrangement for producing the same |
US4884694B1 (fr) * | 1985-08-27 | 1991-07-09 | Sengewald Karl H | |
FR2629060A1 (fr) | 1988-03-28 | 1989-09-29 | Cook In Pack Sa | Dispositif d'obturation automatique par effet thermique de conditionnement pour preparations alimentaires a consommations differees |
EP0490558A1 (fr) * | 1990-12-12 | 1992-06-17 | Sidlaw Flexible Packaging Limited | Emballage pour un produit alimentaire pouvant être cuit dans son propre emballage |
EP0531176A1 (fr) | 1991-09-06 | 1993-03-10 | Unilever Plc | Matériau d'emballage |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002051716A1 (fr) * | 2000-12-22 | 2002-07-04 | Robert Jan Colenbrander | Emballage de produits alimentaires rechauffable pourvu de moyens de ventilation |
GB2367527A (en) * | 2001-07-23 | 2002-04-10 | Abdul Aziz Okhai | Packaging film |
GB2367527B (en) * | 2001-07-23 | 2002-09-11 | Abdul Aziz Okhai | Packaging film |
GB2377906A (fr) * | 2001-07-23 | 2003-01-29 | ||
GB2377906B (en) * | 2001-07-23 | 2004-03-24 | Abdul Aziz Okhai | Packaging film |
EP1422163A1 (fr) * | 2002-11-22 | 2004-05-26 | Amcor Flexibles Europe A/S | Conditionnement pour aliments à réchauffer dans un four |
WO2004048225A1 (fr) * | 2002-11-22 | 2004-06-10 | Amcor Flexibles Europe A/S | Emballage d'aliments destine a etre chauffe dans un four |
WO2004098317A1 (fr) * | 2003-05-08 | 2004-11-18 | Agroinnova, S.L. | Procede de preparation et de conditionnement d'un produit alimentaire frais destine a conserver et a cuire a la vapeur ledit produit et conditionnement correspondant |
ES2221563A1 (es) * | 2003-05-08 | 2004-12-16 | Agroinnova, S.L. | Procedimiento de preparacion y envasado de un producto alimenticio fresco para su conservacion y posterior coccion al vapor, y envase correspondiente. |
EP3575084A1 (fr) * | 2018-06-01 | 2019-12-04 | Amcor Europe Group Management | Bande de film d'étanchéité pour plateaux |
WO2019228822A1 (fr) * | 2018-06-01 | 2019-12-05 | Amcor Europe Group Management | Bande de film pour sceller des barquettes |
Also Published As
Publication number | Publication date |
---|---|
EP0915013B1 (fr) | 2005-12-14 |
ATE312757T1 (de) | 2005-12-15 |
DK0915013T3 (da) | 2006-05-01 |
DE69832771D1 (de) | 2006-01-19 |
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