EP0915013B1 - 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
- EP0915013B1 EP0915013B1 EP98402767A EP98402767A EP0915013B1 EP 0915013 B1 EP0915013 B1 EP 0915013B1 EP 98402767 A EP98402767 A EP 98402767A EP 98402767 A EP98402767 A EP 98402767A EP 0915013 B1 EP0915013 B1 EP 0915013B1
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- EP
- European Patent Office
- Prior art keywords
- adhesive
- sheet
- film
- films
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 18
- 239000013039 cover film Substances 0.000 title 1
- 239000000853 adhesive Substances 0.000 claims abstract description 79
- 230000001070 adhesive effect Effects 0.000 claims abstract description 79
- 239000012945 sealing adhesive Substances 0.000 claims abstract description 15
- 238000005520 cutting process Methods 0.000 claims abstract description 10
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 3
- 238000005304 joining Methods 0.000 claims description 21
- 239000007789 gas Substances 0.000 claims description 20
- 229920002994 synthetic fiber Polymers 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 7
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 7
- -1 polypropylene Polymers 0.000 claims description 7
- 230000004913 activation Effects 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 230000003213 activating effect Effects 0.000 claims description 2
- 238000006068 polycondensation reaction Methods 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims 1
- 230000008018 melting Effects 0.000 claims 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 14
- 239000000463 material Substances 0.000 abstract description 9
- 230000006378 damage Effects 0.000 abstract description 2
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- 238000009833 condensation Methods 0.000 abstract 1
- 230000004927 fusion Effects 0.000 abstract 1
- 238000010411 cooking Methods 0.000 description 12
- 235000013305 food Nutrition 0.000 description 9
- 239000000047 product Substances 0.000 description 6
- 230000001954 sterilising effect Effects 0.000 description 6
- 238000011049 filling Methods 0.000 description 5
- 239000003292 glue Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000004806 packaging method and process Methods 0.000 description 5
- 238000004659 sterilization and disinfection Methods 0.000 description 5
- 239000011324 bead Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000003303 reheating Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
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- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 239000013067 intermediate product Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 241000606545 Biplex Species 0.000 description 1
- 229920008651 Crystalline Polyethylene terephthalate Polymers 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 238000002564 cardiac stress test Methods 0.000 description 1
- 239000005025 cast polypropylene Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
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- 229920006379 extruded polypropylene Polymers 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000004920 heat-sealing lacquer Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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
-
- 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
-
- 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 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 ensure on the one hand the exit to the atmosphere of the gases under pressure inside the container itself, and secondly the return to a filling complete as soon as the internal pressure returns to normal.
- Patent FR-A-2,629,060 proposes to provide trays with a real flapper antiretour movable between two positions respectively corresponding to the opening to the atmosphere of the interior of the tray and its hermetic closure.
- bag for a product called "boil-in-the-bag", and which describes a container of the general type recalled above, stating that one of the faces of the bag is formed by a sheet having two films, one of which has holes that may or may not be facing channels rectilinear and parallel.
- DE 0 160 978 discloses a sheet of synthetic material formed of two superimposed films. A joining adhesive is interposed in the form of a large number of small areas that are not in contact with each other. This sheet presents a static-type operation with unglued areas that remain open for allow "a gas exchange”.
- US 4,884,694 discloses a sheet of synthetic material formed of two superimposed films, the upper film being made of paper and the lower film being thermoplastic material and provided with perforations. This sheet helps to guarantee the gas permeability required for gas sterilization, and in particular hot steam.
- the present invention provides a novel solution to the problem of lidding containers to subject them to differences in temperature and pressure, while using simple, proven and economical manufacturing methods.
- the subject of the invention is also a sheet of synthetic material as defined in the claim 11.
- the invention also relates to an industrial product constituted by a container filled with a content, having a flange and closed by means of a seal which is sealed to the entire surface of the rim and which consists of a sheet of synthetic material conforming the above definition, with areas left free and constituting a network of several parallel channels having at least one outlet to the atmosphere by the edge, or one of the edges, of the closed container.
- the process according to the invention is intended for the lidding of containers A of the known type comprising a body B and a flange continuous device C.
- the container A is an oblong tray but it can be containers of other shapes, in particular pots whose body has a circular section and a frustoconical profile, the edge itself being circular.
- Another example of operculum containers are pots having flat faces, connected by curves, and whose rim has a substantially square contour with rounded corners.
- the lidding must, of course, be carried out after filling the container with a D content that will be supposed here to be a food.
- the cover must be applied over the entire surface of the edge C and be attached to it by means of a adhesive.
- This operculum consists of a sheet composed of two films respectively internal 1 and external 2.
- the inner 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.
- Both films 1 and 2 must be assembled together, which can be at the same time that the inner film 1 is fixed on the flange C or previously, but anyway, this assembly must leave free areas, so that an adhesive inserted between them, called “junction”, must be present only on a part only from the surface of films 1 and 2.
- the two films 1 and 2 are joined to each other only by the places where junction adhesive, to determine a network of channels that open up on the edges of the leaf, between the two films 1 and 2.
- microperforations 3 we are certain that some of they will be in the channels, without the need for any tracking but also because of their high density, these microperforations present, together, a large section of total passage, while being distributed over all the surface of the film 1.
- the atmosphere inside the tray A can communicate with external atmosphere, provided that it is brought to sufficient pressure to exclude films 1 and 2 of each other according to the channels determined by the absence of adhesive 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 flange C, in particular by leaving a tongue (not shown) facilitating its subsequent uprooting by the user, so that he can access content D.
- the joining adhesive can, indifferently, itself be separate from the films 1 and 2, and be formed, in a manner known per se, of a web unwound from a reel (not shown), or be previously applied on the face of any of these films in front of to stand next to the other film.
- the fixing of the sheet on the flange C can be achieved by any means known, in particular by means of a lidding adhesive, it can also be separate from film 1 and edge C, or may have been previously applied to one or the other.
- FIG. 2 shows the case where the sheet 1 bears on its underside an adhesive 4 and on its upper side a bonding adhesive 5.
- the method for producing sheet 1 then advantageously provides for the introduction 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 together by the bonding adhesive 5, the latter not necessarily 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 without adhesive and disposed 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 may have the same physico-chemical characteristics, since the same single heating operation must have the same effects on both adhesives.
- lidding adhesive 4 is applied in a continuous surface
- bonding adhesive 5 is applied discontinuously.
- the two films 1 and 2 are strictly applied one on the other and the D content is perfectly preserved from any contamination from the external atmosphere, because the outer film 2 is waterproof and continuous and because the inner film 1 is itself fixed to the flange C in a sealed and continuous manner.
- zones 6 and 7 extend continuously to the edges of the film 1 as soon as the application of the bonding 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 lid to access the content D, without fear a violent effect due to the internal overpressure, this being automatically eliminated by evacuation of gases through channels 8 and 9.
- Figures 4 to 9 illustrate another embodiment of the method according to the invention. Indeed, here we proceed first to the complete development of the bicellar sheet, in associating the two films 1 and 2 by the joining adhesive 5, in order to obtain a set unit forming a complete industrial product, capable of being sold, delivered, stored and used until closed, without prior operation for the undertaking which carries out the filling container A and sealing it.
- the lidding adhesive 4 may or may not be associated with the sheet thus produced, according to the respective characteristics of the rim C and the film 1.
- this lidding adhesive 4 is effectively applied to the face outer of the sheet, that is to say the outer face of the film 1 opposite the film 2, so that the complete industrial product is immediately available for the lidding by gluing of the sheet on the rim C, independently of the material used to make container A.
- FIGS. 4 and 7 show a coil 10 formed by the winding of numerous turns of 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 one another, and secondly the lidding adhesive 4.
- This sheet is unwound from the spool 10 and is applied stretched over a container A filled with its content D, then this set is placed next to a known mechanism in comprising on the one hand an upper punch 11, bearing a peripheral failure 12 of shapes and dimensions adapted to those of the edge C and comprising means for heating and secondly an anvil 13.
- the container A is placed between the punch 11 and the anvil 13, which are then approached one another, in order to strongly pinch the sheet between the upper punch 11 and the flange C supported by the anvil 13, which has the effect of activating the lidding adhesive 4 and to cause the sheet to be attached to the rim C.
- the sheet is cut as close as possible to the contour of the edge C, thanks to a cutting element 14 provided at the periphery of the fault 12.
- the punch 11 and the anvil 13 are spaced apart (FIGS. 5 and 8) and the sealed container is evacuated to another position in the packaging line.
- the activation of the lidding adhesive 4 intervenes while the joining adhesive 5 has already been activated since the two films 1 and 2 are fixed to each other.
- the activation of the lidding adhesive 4 is done through the entire sheet, because that the fault 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 failure 12 modifies the adhesive of junction 5 which is at the origin of the existence of the channels 8 and 9.
- the two adhesives 4 and 5 have characteristics physicochemical, so that during sealing, the adhesive 4 is activated and that the junction adhesive 5, already used, remains intact.
- two different adhesives can be chosen, the one intended for lidding being active at a temperature significantly lower than that of the bonding adhesive 5.
- the joining adhesive 5 a material obtained by polycondensation
- the lidding adhesive 4 is a material obtained by polymerization
- the arrangement of the bonding adhesive 5 can be in a number of variants, such as examples are shown in Figures 10, 11, 14 and 16.
- the sheet Since the sheet must fulfill its function of evacuating the internal gases under pressure, it is necessary to it can be applied "per kilometer" above the containers to be sealed in series, it is necessary and sufficient that the inner sheet 1 is crossed by multiple perforations and that the outer sheet 2 is adhered to the sheet 1 only partially, in order to obtain not a single isolated channel (and therefore to locate) but a network of several channels, or a network of several branches of a single channel.
- FIGS. 10, 11, 14 and 16 show different dispositions of the zones 6-7 lack of bonding adhesive 5 on the film 1, the latter being crossed multiple pinholes. These microperforations are not shown in FIGS. 10, 11 and 14, only to keep them as clear as possible, but in reality these microperforations are necessarily present, as shown schematically in the figure 16.
- 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 a film 1.
- the joining adhesive 5 leaves parallel straight regions 61 remaining, oriented longitudinally with respect to the film 1.
- the channels resulting from the existence of the zones 61 open necessarily 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 at 62 on the part right of Figure 10, the sheet is cut along the rim of the container, in line with one channels.
- the zones 63 are still rectilinear and parallel, but oriented obliquely to the axis of the film 1.
- zones 68 are arranged in parallel but have a wavy course and no longer rectilinear. They are represented as extending parallel to the axis of the film 1, but they could also be oblique.
- channels 8 and 9 allow evacuation automatic gas and vapor pressure existing inside the container A sealed. When this pressure decreases or even disappears completely, the channels close again automatically thanks to the intrinsic elasticity of films 1 and 2 or, in any case, the top 2 film. When the internal pressure drops below the pressure Atmosphere of the atmosphere, the channels are even hermetically closed and oppose at any entrance of outside air towards the interior of the container, as a consequence of the depression which reigns in container A.
- a first operation can be planned at the place of packaging for the sterilization of containers and their contents.
- a second operation can take place at the user to warm the content, especially when it comes to food.
- the sealing adhesive ensures that there will be no communication between the interior container A and outside, during various handling and storage.
- It may be an adhesive sensitive to temperature and / or humidity.
- a long-acting adhesive of the type applied to articles and sheets of paper repositionable which allows the two films 1 and 2 to move easily apart when the container A is subjected to heating and / or immersion and which, in any case, is in contact with the gases and vapors released by the content D, while reconstituting the collage of these films 1 and 2 when the internal pressure allows them to put back in touch. This effect is even more marked, and the watertightness is ensured, when the internal pressure becomes lower than the atmospheric pressure because the depression which in This results in true plating of the films 1 and 2 against each other.
- the sealing adhesive may also be chosen to melt at a certain temperature. In this case, it must be chosen to be neutralized easily during the elevation of temperature from the sterilization and / or reheating of the content D, so that the exhaust channels for gases and vapors are quickly and largely released before the internal overpressure reaches a dangerous value for the integrity of the container.
- the sealing adhesive has the advantage of compensating, if necessary, the small spacing and / or lack of adhesion of films 1 and 2, especially from tiny irregularities created during the formation of microperforations.
- Microperforations can also be obtained with cold needles, but then acts in a way by tearing, which leaves minute irregularities but very visible under the microscope, having effects equivalent to those of the bead described above.
- the density of the microperforations has been found to provide excellent results between 200 and 2000 perforations per square decimetre in some cases, and between 500 and 1,200 perforations per square decimetre in other cases.
- current research lead to an increase in the density of perforations up to 10,000 perforations per square decimeter and miniaturization of the perforations, as this leads to an excellent distribution of the evacuation vents of gases and vapors under pressure.
- this density must be coordinated with the nature of the content D, because a liquid content is homogeneous in the interior space of the container A and requires a density of perforations incomparably less than that of a foil capping a container containing a food preparation consisting of bulky solid parts, preventing a free flow of gases and vapors.
- the microperforations must be numerous to be everywhere above the solid parts like liquid parts.
- FIG. 16 is an almost full size view illustrating in a very schematic the appearance of a fraction of the film 1 according to the invention, being specified that in reality the film is transparent and microperforations virtually invisible because they correspond to the material removed.
- the channels have a wavy course and are parallel, having outlets located only at the transverse ends of the sheet, and therefore of the container capped.
- microperforations can be spaced from each other at equal distances in orthogonal directions, or on the contrary be separated from different distances.
- the canals should be narrow and numerous than broad and rare, especially when the content is heterogeneous.
- the density of the channels is advantageously between 5 and 15.
- the invention provides for a very large number of perforations of very small diameter as well that a significant number of narrow channels, sealing the fixation of both film 1 and 2 to each other is crucial, as well as, of course, the sealing of the lidding of film 1 on the c-flange
- the film 1 is formed of two layers 1a and 1b fixed to each other along their entire surface and of different but compatible composition.
- One can then choose a composition of the lower layer 1 is coordinated with the composition of the constituent material of the rim C, while choosing the composition of the upper layer 1 b coordinated with that of the film 2.
- the constituent material of the container A (and thus its rim C) is polypropylene, is chosen to constitute the lower layer 1a, cast polypropylene, that is to say of extruded polypropylene - calendered, non-oriented, then that the layer 1b is polyethylene terephthalate (“PET”), the film 2 is also PET.
- PET polyethylene terephthalate
- a film of polyethylene terephthalate thickness ⁇ is coated on one of its faces of a universal heat-sealing lacquer and constitutes the inner film 1.
- This film is pierced with microperforations 3 using a microperforator cold needles, in a configuration where the microperforations are 5 mm apart in the direction of the sheet and 5 mm in the longitudinal direction, shifted by a distance of 2.5 mm per row to give a pattern in squares.
- a film also made of polyethylene terephthalate but only 12 ⁇ thick constitutes the outer film 2.
- a screen cylinder allowing the deposit of the glue comprises peripheral grooves of 2.5 mm width, equidistant from 5 mm.
- the sheet thus “complexed” in width of 600 mm is used on a machine of packaging of the type known as "Fill Seal” for sealing trays crystallized polyethylene terephthalate (“CPET”), with a circular periphery of 95 mm diameter.
- CPET crystallized polyethylene terephthalate
- the equipment is used to seal two rows of trays over a width of 190 mm. Filling, sealing and cutting operations are performed on the machine.
- the trays 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 trays 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 formed by the same films, as in Example 1.
- the screen cylinder which allows the deposition of glue has grooves in the "machine direction" (longitudinally with respect to the scrolling of the films) and in the cross direction, the grooves having a width of 2.5 mm and spaced 5 mm apart.
- the sheet is formed by the same films, as in Examples 1 and 2.
- screened cylinder which allows glue deposition has spiral grooves.
- the sheet is formed by the same films, as in Examples 1, 2 and 3.
- a screened cylinder which allows glue deposition has sinuous grooves.
- the outer film 2 is full, that is to say, continuous and waterproof. It can be simple, as described, or formed of several assembled layers.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closing Of Containers (AREA)
- Packages (AREA)
- Package Closures (AREA)
Description
- la cuisson de l'aliment avant son conditionnement dans un récipient hermétiquement operculé,
- la cuisson après conditionnement dans le récipient.
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 leur 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) étanche, 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) de manière géométriquement régulière,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 géométriques continues nettement déterminées (6-7) sans adhésif de jonction (5), qui constituent un réseau de plusieurs canaux parallèles 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, les canaux étant aptes à s'écarter et à se refermer automatiquement sous l'effet de la pression pour permettre l'évacuation des gaz.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 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 certains au moins des canaux parallèles (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), l'une (1) des pellicules (1-2) présentant de multiples petites perforations (3) selon une densité comprise entre 100 et 10 000 perforations (3) par décimètre carré, l'autre (2) étant étanche, caractérisée en ce qu'un adhésif dit "de jonction" (5) est interposé de manière géométriquement régulière entre les deux pellicules (1 et 2) sur une partie seulement de leur surface, et laisse subsister des zones géométriques continues nettement déterminées (6, 7, 61, 63, 64-65, 66-67, 68, 69) sans adhésif de jonction (5), qui constituent un réseau de plusieurs canaux parallèles (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, les canaux étant aptes à s'écarter et à se refermer automatiquement sous l'effet de la pression pour permettre l'évacuation des gaz.
- 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 canal parallèle (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 chacun des canaux parallèles (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 canaux parallèles (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 certains au moins des canaux parallèles (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 fermé 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 canaux parallèles 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 EP0915013A1 (fr) | 1999-05-12 |
EP0915013B1 true 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) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1016978C2 (nl) * | 2000-12-22 | 2002-06-25 | Robert Jan Colenbrander | Inrichting en werkwijze voor het verpakken en bereiden van voedsel en werkwijze voor het vervaardigen van een dergelijke inrichting. |
GB2367527B (en) * | 2001-07-23 | 2002-09-11 | 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 |
ES2221563B2 (es) * | 2003-05-08 | 2006-01-01 | 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 |
Family Cites Families (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 |
DE3416752A1 (de) * | 1984-05-07 | 1985-11-07 | Nyffeler, Corti AG, Kirchberg | Verschlussmembran fuer behaelter mit gas-entwickelndem fuellgut |
DE3521373C2 (de) | 1985-06-14 | 1987-03-26 | Heinrich Hermann Gmbh + Co, 7000 Stuttgart | Überdruckventil für einen Verpackungsbehälter, insbesondere aus flexiblem Werkstoff und dessen Herstellungsverfahren |
DE3623568A1 (de) * | 1985-08-27 | 1987-03-12 | Sengewald Karl H | Gassterilisierbare verpackung |
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 |
GB2251420A (en) * | 1990-12-12 | 1992-07-08 | Courtaulds Packaging Ltd | Package in which foodstuff may be heated and/or cooked |
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 DK DK98402767T patent/DK0915013T3/da active
- 1998-11-06 EP EP98402767A patent/EP0915013B1/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ATE312757T1 (de) | 2005-12-15 |
DE69832771D1 (de) | 2006-01-19 |
EP0915013A1 (fr) | 1999-05-12 |
DK0915013T3 (da) | 2006-05-01 |
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