WO2007063226A1 - Peel-off films for closing a sterilizable container - Google Patents
Peel-off films for closing a sterilizable container Download PDFInfo
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- WO2007063226A1 WO2007063226A1 PCT/FR2006/002627 FR2006002627W WO2007063226A1 WO 2007063226 A1 WO2007063226 A1 WO 2007063226A1 FR 2006002627 W FR2006002627 W FR 2006002627W WO 2007063226 A1 WO2007063226 A1 WO 2007063226A1
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- layer
- inner layer
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- rim
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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
- B65D77/10—Container closures formed after filling
- B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
- B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
- B65D77/2028—Means for opening the cover other than, or in addition to, a pull tab
- B65D77/2032—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
- B65D77/2044—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure
Definitions
- the invention relates to the field of peelable closure lids for sealing containers. These covers form a closure membrane, typically provided with a manual gripping tab, to be sealed on the rim of a container.
- the adhesion force between the edge of the container and the seal sealed thereon must be large enough so that the seal does not come off the edge of the container under the action of the pressure produced inside the container during the sterilization operation.
- the adhesive force of the lid on the edge of the container must be chosen so large that, at the opening of the container, the force required for the peel of the operculum is excessively high.
- the aim of the invention is to develop a seal forming a seal capable of being sealed on a rim of an opening of a container intended to be sterilized, after filling with a content, typically a food product to be sterilized, and closure by sealing said seal, this seal allowing:
- the closing cap made of a multilayer flexible material, comprises a tear-off tab and a shut-off pad, said multilayer material comprising an outer layer and an inner layer coated with a sealing agent, said cap being intended to be sealed, by a sealing peripheral edge, on a rim of a container to be sealed, a manual pull exerted on said tongue of said seal sealed on said rim of said container by means of a sealed peripheral rim, resulting in peeling of said lid and an opening of said container.
- This seal is characterized in that: a) the inner layer has a first line of weakness formed along a peripheral line, said peripheral line being marked and intended to be opposite said rim, on its inner part, when said peripheral edge of said lid is sealed to said flange, b) said outer layer and said inner layer are joined to each other by means of an intermediate layer solidarisant said outer and inner layers, said intermediate layer being chosen in nature and thickness so as to allow a rupture of said a peripheral edge sealed in its thickness between said outer layer and said inner layer, so that said manual traction exerted on said tongue causes a central portion of said inner layer delimited by said peripheral line, so as to form a central opening, a peripheral portion of said inner layer remaining sealed to said flange.
- the tests carried out with both a laboratory sterilizer and an industrial sterilizer have shown that the invention made it possible to preserve the integrity of said closure by sealing during the entire sterilization stage, even when said sterilization is carried out without back pressure, or even in cases, where, deliberately, the sterilization was carried out with a little stabilized or poorly regulated back pressure, so as to reproduce the hazards encountered in industrial production.
- Figure 1 is a plan view of the sealing face of a lid.
- Figure 2 shows a section through the seal of Figure 1 welded to a container edge along its line I-I.
- Figures 3 and 4 illustrate the seal of Figure 2 welded to the edge of a container at different stages of the opening.
- Figure 5 is an enlarged representation of a portion of Figure 3.
- said inner layer (16) may comprise a second line of weakness (26) formed along a line (26 ') forming a junction between said tongue of tear (12) and said shutter area (11), said line (26 ') being located and intended to be opposite said flange
- Said second line of weakness (26) may extend for at least 50% of the length of said marked line (26 ') which is typically curvilinear.
- said second line of weakening may extend for at least 50% of the length of said marked line (26 ') which is typically curvilinear.
- said first line of weakness (22) and said second line of weakness (26) may be formed by an incision formed in said inner layer (16) coated with said sealant (20), at least half-flesh on a fraction at least 50% of the thickness of said inner layer (16) coated with said sealant (20). Said incision may be formed over the entire thickness of said inner layer (16) coated with said sealant (20) and typically over a portion of the thickness of said intermediate layer (18), such that an adhesive break between said inner layer (16) and said intermediate layer (18) allows said operculum (10) to be peeled off by forming said central opening.
- said outer layer (14) may comprise an aluminum film having a thickness ranging from 20 ⁇ m to 80 ⁇ m, and typically having a thickness ranging from 45 ⁇ m to 65 ⁇ m.
- Said aluminum film may comprise an impression on its outer surface, said printing being typically covered with a protective varnish called overprinting.
- Said inner layer (16) may comprise a thermoplastic film of traction modulus at least equal to 800 MPa, and of thickness ranging from 20 ⁇ m to 80 ⁇ m, and typically of a thickness ranging from 40 ⁇ m to 60 ⁇ m.
- thermoplastic film may be a polyolefin film, preferably PP, typically an unoriented PP, or polyester.
- said inner layer (16) may comprise a second aluminum film having a thickness ranging from 20 ⁇ m to 80 ⁇ m, and typically having a thickness ranging from 45 ⁇ m to 65 ⁇ m.
- said outer (14) and intermediate (18) layers may be secured by an adhesive layer (19) with a grammage ranging from 1 to 6 g / m 2 .
- said intermediate layer (18) may be a polyolefin-based thermoplastic extrusion monolayer or a polyolefin-based thermoplastic coextrusion multilayer, said monolayer or said multilayer having a basis weight of 30 g / m 2. m 2 at 80 g / m 2 and typically 40 g / m 2 to 60 g / m 2 .
- Said monolayer or said multilayer may be chosen so as to fasten said inner layer (16) to said outer layer (14) or possibly to said adhesive layer (19) and to allow said rupture.
- said sealing agent (20) may be formed by an extruded or coextruded sealing layer (20 ') of plastics material having a basis weight ranging from 30 g / m 2 to 80 g / m 2 and typically 40 g / m 2 at 60 g / m 2 .
- Said sealing layer (20 ') may be chosen to adhere to any material constituting said flange (30), typically chosen from: glass, aluminum, iron or tinplate, a plastic material.
- said rupture when said manual traction is exerted on said tab of said seal (10) sealed on said rim (30) of said container, may be either a cohesive rupture of said intermediate layer (18), or an adhesive break between said inner layer (16) and said intermediate layer (18).
- said shutter range (11) has a shape and an outer contour corresponding to the outer contour of said rim (30), said shutter range (11) being of typically round or oval or polygonal, rectangular or square shape, said shutter range (11) having an area ranging from 10 cm 2 to 400 cm 2 .
- Another object of the invention is constituted by a method of manufacturing lids according to the invention.
- Another object of the invention is constituted by a container with a container rim (30) delimiting a filling and sampling aperture (32) closed by a lid (10) according to the invention, said lid (10) having been sealed to said flange (30) after loading a product, typically a food product, said container thus loaded being sterilized or intended to be sterilized.
- At least said flange (30), and possibly said container, may be formed of a material selected from: glass, aluminum, iron or tinplate, plastic.
- said rim (30) may be an outer rim or an inner rim.
- FIGS 1 to 5 illustrate an embodiment of a closure cap (10).
- Round lids (10) of diameter, typically ranging from 40 mm to 120 mm, have thus been manufactured and intended to seal metal cans to be sterilized.
- FIG. 10 illustrates an embodiment of a closure cap (10).
- the outer layer (14) is an aluminum film 30 ⁇ m thick
- the intermediate layer (18) is a 40 ⁇ m thick PE extrusion layer
- the inner layer (16) is a non-oriented PP film (PPN) of 50 ⁇ m in thickness.
- PPN non-oriented PP film
- the sealing agent (20) consists of an extruded sealing layer (20 ') of 50 microns thick.
- a layer of multilayer material having a structure symbolically represented by: 14/19/18/16/20 was first formed by assembling layers.
- the outer layer (14) was a layer externally coated with an impression typically constituted by a plurality of patterns, each seal having said pattern.
- the strip of multilayer material is then incised to form an incised strip comprising said first (22) and second (26) lines of weakness.
- said strip of multilayer material was incised in a marked manner, so that the printing pattern is correctly centered especially relative to at said first line of weakness (22).
- the inner layer (16) has been incised partially or completely along the peripheral line (22 ') so as to form said first line of weakness (22).
- the inner layer (16) has been incised totally or partially along a marked line (26 ') disposed transversely to the pull direction of the tear tongue (12) to form said second line of weakness (26) over a curvilinear distance substantially equal to 75% of the length of said curvilinear line (26 ').
- the lids (10) were then cut in a marked manner in said incised strip.
- FIG. 2 represents the closing cap (10) during the sealing operation of the lid (10) on the edge (30) of a container not shown in the drawing.
- Sealing between the sealing layer (20 ') and the sealing rim (30) of the container has been performed by means of a sealing jaw (28), which presses the closure cap (10) against the rim ( 30) of the container under a pressure sufficient to seal and at a predetermined sealing temperature by the combination of the facing materials.
- the higher temperature during sealing has led to an increased adhesive force between the layers of the seal (10) in its sealed peripheral edge (13 ').
- lids (10) according to the invention, and previously filled with a food product to be packaged, could be sterilized in an autoclave without back pressure, and this, without it being observed on the containers thus sterilized any alteration of the sealing range or any separation of the seal from the container.
- the lid (IQ) is grasped by the tear tab (12) which is then pulled over the portion of the lid (10) sealed and remaining to remove.
- a tear extending from the tip of said second weakening line (26) propagates firstly between the outer layer (14) and the peripheral portion (16 ") of the inner layer (16) transversely to the sealed peripheral edge (13 '), and joins, at the exit of this border (13'), said first line of weakness (22) along said line peripheral (22 ').
- the central portion (16') is separated from said inner layer (16), said peripheral portion (16 ") from said inner layer (16). ) remaining welded on said edge (30) of the container, so as to provide access to the opening (32) for filling and sampling said container.
- the path of a tear (34) is plotted from the tip (27) of said second line of weakness (26) to the incision of the inner layer (16) forming said first line weakening (22).
- the tear (34) progresses in a cohesive rupture inside the intermediate layer (18). This tear path (34) occurs when the cohesive forces within the intermediate layer (18) are greater than the adhesion forces between the intermediate layer (18) and the outer layer (14) or the inner layer (16).
- the tear (34) in the sealed peripheral edge (13 ') forming the sealing region may also propagate in the boundary layer between the intermediate layer (18) and the outer (14) or inner (16) layers, or optionally between the intermediate layer (18) and the adhesive layer (19).
- these packaging can be of all types, and mainly metal, glass. This is generally the field of vegetable preserves, but many other products may require sterilization.
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Abstract
The film (10) of multilayer material comprises a tear-off tab (12) and a sealing area (11), said multilayer material comprising an outer layer (14) and, coated with a sealing agent (20), an inner layer (16); said film (10) being designed to be sealed, by a peripheral sealing border (13), to a rim (30) of a container that is to be closed, said film being characterized in that: a) the inner layer (16) has a first line of weakness formed along a peripheral line (22), said peripheral line (22) being identified and intended to be placed against said rim (30), b) said outer layer (14) and said inner layer (16) are held together by an intermediate layer (18), the type and thickness of which are chosen to allow said sealed peripheral border to be broken. Advantages: excellent sterilization resistance and easy opening by pulling the tab manually.
Description
OPERCULES PELABLES DESTINES A OBTURER UN , RECIPIENT STERILISABLEPEELABLE OPERATORS FOR SEPARATING A STERILIZABLE CONTAINER
DOMAINE DE L'INVENTIONFIELD OF THE INVENTION
L'invention concerne le domaine des opercules de fermeture pelables destinés à obturer des récipients. Ces opercules forment une membrane de fermeture, typiquement dotée d'une languette de préhension manuelle, destinée à être scellée sur le rebord d'un récipient.The invention relates to the field of peelable closure lids for sealing containers. These covers form a closure membrane, typically provided with a manual gripping tab, to be sealed on the rim of a container.
ETAT DE LA TECHNIQUESTATE OF THE ART
II est connu de fermer des récipients avec un opercule formant une membrane en forme de film, ledit film comprenant une couche intérieure de scellage. De tels opercules sont scellés directement sur le bord entourant l'ouverture du récipient, par exemple dans des récipients en matière plastique ou en verre. Avec des récipients en aluminium ou en fer blanc, l'opercule est habituellement scellé sur le bord d'un anneau de couvercle.It is known to close containers with a film-forming membrane seal, said film comprising an inner sealing layer. Such lids are sealed directly on the edge surrounding the opening of the container, for example in plastic or glass containers. With aluminum or tinplate containers, the seal is usually sealed to the edge of a lid ring.
Pour faciliter l'ouverture du récipient par pelage de l'opercule du bord de l'ouverture, il suffit de tirer sur ladite languette. Pour que le pelage soit possible sans effort exagéré, l'opercule ne doit pas être scellé trop solidement sur le bord du récipient. PROBLEMES POSESTo facilitate the opening of the container by peeling the seal from the edge of the opening, simply pull on said tab. For peeling to be possible without undue effort, the lid should not be sealed too tightly on the edge of the container. PROBLEMS POSED
Dans le cas où les récipients avec une fermeture par un opercule doivent être stérilisés, et surtout dans le cas où ils doivent être stérilisés sans contre-pression, ou sans une contre-pression parfaitement régulée, la force d'adhérence entre le bord du récipient et l'opercule scellé sur celui-ci doit être suffisamment grande pour que l'opercule ne se détache pas du bord du récipient sous l'action de la pression produite à l'intérieur du récipient lors de l'opération de stérilisation.
Cependant, dans les systèmes de fermeture par opercule connus aujourd'hui, la force d'adhérence de l'opercule sur le bord du récipient doit être choisie tellement grande que, à l'ouverture du récipient, l'effort nécessaire pour le pelage de l'opercule est excessivement élevé.In the case where the containers with a closure by a lid must be sterilized, and especially in the case where they must be sterilized without back pressure, or without a perfectly regulated back pressure, the adhesion force between the edge of the container and the seal sealed thereon must be large enough so that the seal does not come off the edge of the container under the action of the pressure produced inside the container during the sterilization operation. However, in the closure systems known today, the adhesive force of the lid on the edge of the container must be chosen so large that, at the opening of the container, the force required for the peel of the operculum is excessively high.
L'invention vise consiste à mettre au point un opercule formant un opercule apte à être scellé sur un rebord d'une ouverture d'un récipient destiné à être stérilisé, après remplissage avec un contenu, typiquement un produit alimentaire à stériliser, et fermeture par scellage dudit opercule, cet opercule permettant :The aim of the invention is to develop a seal forming a seal capable of being sealed on a rim of an opening of a container intended to be sterilized, after filling with a content, typically a food product to be sterilized, and closure by sealing said seal, this seal allowing:
- d'une part, de conserver l'intégrité de ladite fermeture par scellage durant notamment toute l'étape de stérilisation, même lorsque ladite stérilisation est effectuée sans contre- pression, ou avec une contre-pression peu stabilisée ou mal régulée,on the one hand, to preserve the integrity of said closure by sealing during the entire sterilization stage, even when said sterilization is carried out without back pressure, or with a slightly stabilized or poorly regulated back pressure,
- d'autre part, de pouvoir ouvrir ultérieurement le récipient stérilisé obturé par ledit opercule, en tirant sur ladite languette avec un effort modéré.- On the other hand, to be able to subsequently open the sterilized container closed by said lid, by pulling on said tongue with a moderate effort.
DESCRIPTION DE L'INVENTIONDESCRIPTION OF THE INVENTION
Selon l'invention, l'opercule de fermeture, en un matériau flexible multicouche, comprend une languette de déchirage et une plage d'obturation, ledit matériau multicouche comprenant une couche extérieure et une couche intérieure revêtue d'un agent de scellage, ledit opercule étant destiné à être scellé, par une bordure périphérique de scellage, sur un rebord d'un récipient à obturer, une traction manuelle exercée sur ladite languette dudit opercule scellé sur ledit rebord dudit récipient grâce à une bordure périphérique scellée, entraînant un pelage dudit opercule et une ouverture dudit récipient.According to the invention, the closing cap, made of a multilayer flexible material, comprises a tear-off tab and a shut-off pad, said multilayer material comprising an outer layer and an inner layer coated with a sealing agent, said cap being intended to be sealed, by a sealing peripheral edge, on a rim of a container to be sealed, a manual pull exerted on said tongue of said seal sealed on said rim of said container by means of a sealed peripheral rim, resulting in peeling of said lid and an opening of said container.
Cet opercule est caractérisé en ce que : a) la couche intérieure présente une première ligne d'affaiblissement formée le long d'une ligne périphérique, ladite ligne périphérique étant repérée et destinée à être en regard dudit rebord, sur sa partie intérieure, lorsque ladite bordure périphérique dudit opercule est scellée audit rebord,
b) ladite couche extérieure et ladite couche intérieure sont assemblées l'une à l'autre au moyen d'une couche intermédiaire solidarisant lesdites couches extérieure et intérieure, ladite couche intermédiaire étant choisie en nature et en épaisseur de manière à permettre une rupture de ladite bordure périphérique scellée dans son épaisseur entre ladite couche extérieure et ladite couche intérieure, afin que ladite traction manuelle exercée sur ladite languette entraîne une partie centrale de ladite couche intérieure délimitée par ladite ligne périphérique, de manière à former une ouverture centrale, une partie périphérique de ladite couche intérieure restant scellée audit rebord.This seal is characterized in that: a) the inner layer has a first line of weakness formed along a peripheral line, said peripheral line being marked and intended to be opposite said rim, on its inner part, when said peripheral edge of said lid is sealed to said flange, b) said outer layer and said inner layer are joined to each other by means of an intermediate layer solidarisant said outer and inner layers, said intermediate layer being chosen in nature and thickness so as to allow a rupture of said a peripheral edge sealed in its thickness between said outer layer and said inner layer, so that said manual traction exerted on said tongue causes a central portion of said inner layer delimited by said peripheral line, so as to form a central opening, a peripheral portion of said inner layer remaining sealed to said flange.
La demanderesse a observé que cette combinaison de moyens résout les problèmes posés.The Applicant has observed that this combination of means solves the problems posed.
En effet, d'une part, les tests réalisés tant avec un stérilisateur de laboratoire qu'avec un stérilisateur industriel, ont montré que l'invention permettait de conserver l'intégrité de ladite fermeture par scellage durant notamment toute l'étape de stérilisation, même lorsque ladite stérilisation est effectuée sans contre-pression, ou même dans les cas, où, volontairement, la stérilisation a été réalisée avec une contre-pression peu stabilisée ou mal régulée, de façon à reproduire les aléas rencontrés en production industrielle. D'autre part, il a bien été observé qu'il était possible d'ouvrir ultérieurement le récipient stérilisé obturé par ledit opercule, en tirant sur ladite languette avec un effort modéré.Indeed, on the one hand, the tests carried out with both a laboratory sterilizer and an industrial sterilizer, have shown that the invention made it possible to preserve the integrity of said closure by sealing during the entire sterilization stage, even when said sterilization is carried out without back pressure, or even in cases, where, deliberately, the sterilization was carried out with a little stabilized or poorly regulated back pressure, so as to reproduce the hazards encountered in industrial production. On the other hand, it has been observed that it was possible to subsequently open the sterilized container closed by said lid, by pulling on said tongue with a moderate effort.
DESCRIPTION DES FIGURESDESCRIPTION OF THE FIGURES
La figure 1 est une vue en plan de la face de scellage d'un opercule.Figure 1 is a plan view of the sealing face of a lid.
La figure 2 montre une coupe à travers l'opercule de la figure 1 soudée sur un bord de récipient, le long de sa ligne I-I.Figure 2 shows a section through the seal of Figure 1 welded to a container edge along its line I-I.
Les figures 3 et 4 illustrent l'opercule de la figure 2 soudée sur le bord d'un récipient, à différents stades de l'ouverture. La figure 5 est une représentation agrandie d'une partie de la figure 3.
DESCRIPTION DETAILLEE DE L'INVENTIONFigures 3 and 4 illustrate the seal of Figure 2 welded to the edge of a container at different stages of the opening. Figure 5 is an enlarged representation of a portion of Figure 3. DETAILED DESCRIPTION OF THE INVENTION
Selon l'invention, et comme illustré sur les figures 1 à 6, ladite couche intérieure (16) peut comprendre une seconde ligne d'affaiblissement (26) formée le long d'une ligne (26') formant une jonction entre ladite languette de déchirure (12) et ladite plage d'obturation (11), ladite ligne (26') étant repérée et destinée à être en regard dudit rebordAccording to the invention, and as illustrated in FIGS. 1 to 6, said inner layer (16) may comprise a second line of weakness (26) formed along a line (26 ') forming a junction between said tongue of tear (12) and said shutter area (11), said line (26 ') being located and intended to be opposite said flange
(30), sur sa partie extérieure, de manière à faciliter ladite rupture.(30), on its outer part, so as to facilitate said rupture.
Ladite seconde ligne d'affaiblissement (26) peut s'étendre sur au moins 50 % de la longueur de ladite ligne repérée (26') typiquement curviligne. Sur l'exemple d'opercule représenté sur la figure 1, ladite seconde ligne d'affaiblissementSaid second line of weakness (26) may extend for at least 50% of the length of said marked line (26 ') which is typically curvilinear. On the example of the lid shown in FIG. 1, said second line of weakening
(26) s'étend sur environ 75% de la longueur de ladite ligne repérée (26'), qui a été représentée en pointillés sur la figure 1 pour ses deux parties extrêmes qui ne comprennent pas de ligne d'affaiblissement.(26) extends about 75% of the length of said marked line (26 '), which has been shown in dashed lines in Figure 1 for its two end portions which do not include a line of weakness.
Typiquement, ladite première ligne d'affaiblissement (22) et ladite seconde ligne d'affaiblissement (26) peuvent être formées par une incision formée dans ladite couche intérieure (16) revêtue dudit agent de scellage (20), au moins à mi-chair, sur une fraction au moins égale à 50 % de l'épaisseur de ladite couche intérieure (16) revêtue dudit agent de scellage (20). Ladite incision peut être formée sur la totalité de l'épaisseur de ladite couche intérieure (16) revêtue dudit agent de scellage (20) et typiquement sur une partie de l'épaisseur de ladite couche intermédiaire (18), de manière à ce qu'une rupture adhésive entre ladite couche intérieure (16) et ladite couche intermédiaire (18) permette de peler ledit opercule (10) en formant ladite ouverture centrale.Typically, said first line of weakness (22) and said second line of weakness (26) may be formed by an incision formed in said inner layer (16) coated with said sealant (20), at least half-flesh on a fraction at least 50% of the thickness of said inner layer (16) coated with said sealant (20). Said incision may be formed over the entire thickness of said inner layer (16) coated with said sealant (20) and typically over a portion of the thickness of said intermediate layer (18), such that an adhesive break between said inner layer (16) and said intermediate layer (18) allows said operculum (10) to be peeled off by forming said central opening.
Selon l'invention, ladite couche extérieure (14) peut comprendre un film d'aluminium d'une épaisseur allant de 20 μm à 80 μm, et typiquement d'une épaisseur allant de 45 μm à 65 μm. Ledit film d'aluminium peut comprendre une impression sur sa surface extérieure, ladite impression étant typiquement recouverte d'un vernis protecteur dit de sur-impression.
Ladite couche intérieure (16) peut comprendre un film en matière thermoplastique de module de traction au moins égal à 800 MPa, et d'épaisseur allant de 20 μm à 80 μm, et typiquement d'une épaisseur allant de 40 μm à 60 μm.According to the invention, said outer layer (14) may comprise an aluminum film having a thickness ranging from 20 μm to 80 μm, and typically having a thickness ranging from 45 μm to 65 μm. Said aluminum film may comprise an impression on its outer surface, said printing being typically covered with a protective varnish called overprinting. Said inner layer (16) may comprise a thermoplastic film of traction modulus at least equal to 800 MPa, and of thickness ranging from 20 μm to 80 μm, and typically of a thickness ranging from 40 μm to 60 μm.
Ledit film en matière thermoplastique peut être un film en polyoléfine, de préférence en PP, typiquement un PP non orienté, ou en polyester.Said thermoplastic film may be a polyolefin film, preferably PP, typically an unoriented PP, or polyester.
Selon une autre modalité de l'invention, ladite couche intérieure (16) peut comprendre un second film d'aluminium d'une épaisseur allant de 20 μm à 80 μm, et typiquement d'une épaisseur allant de 45 μm à 65 μm.According to another embodiment of the invention, said inner layer (16) may comprise a second aluminum film having a thickness ranging from 20 μm to 80 μm, and typically having a thickness ranging from 45 μm to 65 μm.
Comme illustré sur la figure 5, lesdites couches extérieure (14) et intermédiaire (18) peuvent être solidarisées par une couche d'adhésif (19) avec un grammage allant de 1 à 6 g/m2.As illustrated in FIG. 5, said outer (14) and intermediate (18) layers may be secured by an adhesive layer (19) with a grammage ranging from 1 to 6 g / m 2 .
Avantageusement, ladite couche intermédiaire (18) peut être une monocouche d'extrusion en matière thermoplastique à base de polyoléfine ou une multicouche de co- extrusion en matière thermoplastique à base de polyoléfine, ladite monocouche ou ladite multicouche présentant un grammage allant de 30 g/m2 à 80 g/m2 et typiquement de 40 g/m2 à 60 g/m2.Advantageously, said intermediate layer (18) may be a polyolefin-based thermoplastic extrusion monolayer or a polyolefin-based thermoplastic coextrusion multilayer, said monolayer or said multilayer having a basis weight of 30 g / m 2. m 2 at 80 g / m 2 and typically 40 g / m 2 to 60 g / m 2 .
Ladite monocouche ou ladite multicouche peuvent être choisies de manière à solidariser ladite couche intérieure (16) à ladite couche extérieure (14) ou éventuellement à ladite couche d'adhésif (19) et à permettre ladite rupture.Said monolayer or said multilayer may be chosen so as to fasten said inner layer (16) to said outer layer (14) or possibly to said adhesive layer (19) and to allow said rupture.
Selon l'invention, ledit agent de scellage (20) peut être formé par une couche de scellage extradée ou coextrudée (20') en matière plastique présentant un grammage allant de 30 g/m2 à 80 g/m2 et typiquement de 40 g/m2 à 60 g/m2.According to the invention, said sealing agent (20) may be formed by an extruded or coextruded sealing layer (20 ') of plastics material having a basis weight ranging from 30 g / m 2 to 80 g / m 2 and typically 40 g / m 2 at 60 g / m 2 .
Ladite couche de scellage (20') peut être choisie pour adhérer sur tout matériau constituant ledit rebord (30), typiquement choisi parmi : le verre, l'aluminium, le fer ou le fer blanc, une matière plastique.Said sealing layer (20 ') may be chosen to adhere to any material constituting said flange (30), typically chosen from: glass, aluminum, iron or tinplate, a plastic material.
Selon les modalités pratiques de réalisation de l'operculé, ladite rupture, lorsque ladite traction manuelle est exercée sur ladite languette dudit opercule (10) scellé sur ledit
rebord (30) dudit récipient, peut être soit une rupture cohésive de ladite couche intermédiaire (18), soit une rupture adhésive entre ladite couche intérieure (16) et ladite couche intermédiaire (18).According to the practical embodiment of the seal, said rupture, when said manual traction is exerted on said tab of said seal (10) sealed on said rim (30) of said container, may be either a cohesive rupture of said intermediate layer (18), or an adhesive break between said inner layer (16) and said intermediate layer (18).
Généralement, ladite plage d'obturation (11) présente une forme et un contour extérieur correspondant au contour extérieur dudit rebord (30), ladite plage d'obturation (11) étant de forme typiquement ronde ou ovale ou polygonale, rectangulaire ou carrée, ladite plage d'obturation (11) présentant une aire allant de 10 cm2 à 400 cm2.Generally, said shutter range (11) has a shape and an outer contour corresponding to the outer contour of said rim (30), said shutter range (11) being of typically round or oval or polygonal, rectangular or square shape, said shutter range (11) having an area ranging from 10 cm 2 to 400 cm 2 .
Un autre objet de l'invention est constitué par un procédé de fabrication d'opercules selon l'invention.Another object of the invention is constituted by a method of manufacturing lids according to the invention.
Dans ce procédé : a) on approvisionne : al) ladite couche extérieure (14) comprenant ledit film d'aluminium, ledit film d'aluminium comprenant éventuellement sur sa face extérieure, une impression, de préférence recouverte de par un vernis de sur-impression, et éventuellement sur sa face intérieure, ladite couche d'adhésif (19), a2) ladite couche intérieure (16) comprenant ledit film en matière thermoplastique ou ledit second film d'aluminium, b) on assemble lesdites couches extérieure (14) et intérieure (16) en extradant ou co- extrudant ladite couche intermédiaire (18), c) on dépose ledit agent de scellage (20) sur ladite couche intérieure (16) en extradant ou co-extrudant sur ladite couche intérieure (16) une couche de scellage extradée ou de coextrudée (20'), de manière à obtenir une bande de matériau multicouche, d) on forme une pluralité d'opercules : dl) soit en découpant d'abord les opercules dans ladite bande, et en incisant ensuite les opercules pour former lesdites première et seconde lignes d'affaiblissement, d2) soit en incisant d'abord ladite bande pour former une bande incisée comprenant lesdites première et seconde lignes d'affaiblissement, et en découpant ensuite les opercules dans ladite bande incisée, lesdits opercules ainsi découpés et incisés étant ensuite disposés en piles.
Un autre objet de l'invention est constitué par un récipient avec un rebord de récipient (30) délimitant une ouverture de remplissage et de prélèvement (32) fermé par un opercule (10) selon l'invention, ledit opercule (10) ayant été scellé audit rebord (30) après chargement d'un produit, typiquement un produit alimentaire, ledit récipient ainsi chargé étant stérilisé ou destiné à être stérilisé.In this process: a) supplying: al) said outer layer (14) comprising said aluminum film, said aluminum film optionally comprising on its outer face, an impression, preferably covered by an overprint varnish and optionally on its inside, said adhesive layer (19), a2) said inner layer (16) comprising said thermoplastic film or said second aluminum film, b) said outer layers (14) are assembled and interior (16) extruding or coextruding said intermediate layer (18), c) depositing said sealant (20) on said inner layer (16) by extruding or coextruding on said inner layer (16) a layer extruded or coextruded sealing (20 '), so as to obtain a strip of multilayer material, d) forming a plurality of lids: dl) either by first cutting the lids in said strip, and then incising the operculas for forming said first and second weakening lines, d2) either by first incising said strip to form an incised strip comprising said first and second lines of weakness, and then cutting the covers in said incised strip, said caps thus cut and incised are then arranged in stacks. Another object of the invention is constituted by a container with a container rim (30) delimiting a filling and sampling aperture (32) closed by a lid (10) according to the invention, said lid (10) having been sealed to said flange (30) after loading a product, typically a food product, said container thus loaded being sterilized or intended to be sterilized.
Dans ce récipient, au moins ledit rebord (30), et éventuellement ledit récipient, peut être formé en un matériau choisi parmi : le verre, l'aluminium, le fer ou le fer blanc, une matière plastique. Dans ce récipient, ledit rebord (30) peut être un rebord extérieur ou un rebord intérieur.In this container, at least said flange (30), and possibly said container, may be formed of a material selected from: glass, aluminum, iron or tinplate, plastic. In this container, said rim (30) may be an outer rim or an inner rim.
EXMPLE DE REALISATIONEXAMPLE OF REALIZATION
Les figures 1 à 5 illustrent un exemple de réalisation d'un opercule de fermeture (10). On a ainsi fabriqué des opercules (10) ronds de diamètre allant typiquement de 40 mm à 120 mm et destinés à obturer des boîtes de conserve métalliques devant être stérilisées. Dans cet exemple :Figures 1 to 5 illustrate an embodiment of a closure cap (10). Round lids (10) of diameter, typically ranging from 40 mm to 120 mm, have thus been manufactured and intended to seal metal cans to be sterilized. In this example:
- la couche extérieure (14) est un film d'aluminium de 30 μm d'épaisseur, - la couche intermédiaire (18) est une couche d'extrusion en PE de 40 μm d'épaisseur,the outer layer (14) is an aluminum film 30 μm thick, the intermediate layer (18) is a 40 μm thick PE extrusion layer,
- la couche intérieure (16) est un film de PP non orienté (PPN) de 50 μm d'épaisseur.the inner layer (16) is a non-oriented PP film (PPN) of 50 μm in thickness.
- l'agent de scellage (20) est constitué par une couche de scellage extradée (20') de 50 μm d'épaisseur.- The sealing agent (20) consists of an extruded sealing layer (20 ') of 50 microns thick.
- une couche d'adhésif (19) de 3 μm d'épaisseur a servi à solidariser le film d'aluminium (14) à la couche intermédiaire (18).- A layer of adhesive (19) of 3 microns thick was used to secure the aluminum film (14) to the intermediate layer (18).
On a d'abord formé par assemblage de couches une bande de matériau multicouche de structure représentée symboliquement par : 14 / 19 / 18 / 16 / 20A layer of multilayer material having a structure symbolically represented by: 14/19/18/16/20 was first formed by assembling layers.
Dans certains essais, la couche extérieure (14) était une couche revêtue extérieurement d'une impression constituée typiquement par une pluralité de motifs, chaque opercule devant comprendre ledit motif.
La bande de matériau multicouche a ensuite été incisée de manière à former une bande incisée comprenant lesdites première (22) et seconde (26) lignes d'affaiblissement. Dans le cas où la couche extérieure (14) était une couche revêtue extérieurement d'une impression comprenant une pluralité de motifs, ladite bande de matériau multicouche a été incisée de manière repérée, afin que le motif d'impression soit correctement centré notamment par rapport à ladite première ligne d'affaiblissement (22). Pour cela, la couche intérieure (16) a été incisée partiellement ou totalement le long de la ligne périphérique (22') de manière à former ladite première ligne d'affaiblissement (22). Dans la région de la languette de déchirage (12), la couche intérieure (16) a été incisée totalement ou partiellement le long d'une ligne repérée (26') disposée transversalement à la direction de traction de la languette de déchirage (12), de manière à former ladite seconde ligne d'affaiblissement (26), sur une distance curviligne correspondant sensiblement à 75 % de la longueur de ladite ligne repérée (26') curviligne. On a ensuite découpé, de manière repérée, les opercules (10) dans ladite bande incisée.In some tests, the outer layer (14) was a layer externally coated with an impression typically constituted by a plurality of patterns, each seal having said pattern. The strip of multilayer material is then incised to form an incised strip comprising said first (22) and second (26) lines of weakness. In the case where the outer layer (14) was a layer externally coated with an impression comprising a plurality of patterns, said strip of multilayer material was incised in a marked manner, so that the printing pattern is correctly centered especially relative to at said first line of weakness (22). For this, the inner layer (16) has been incised partially or completely along the peripheral line (22 ') so as to form said first line of weakness (22). In the region of the tear tongue (12), the inner layer (16) has been incised totally or partially along a marked line (26 ') disposed transversely to the pull direction of the tear tongue (12) to form said second line of weakness (26) over a curvilinear distance substantially equal to 75% of the length of said curvilinear line (26 '). The lids (10) were then cut in a marked manner in said incised strip.
La figure 2 représente l'opercule de fermeture (10) pendant l'opération de scellage de l'opercule (10) sur le bord (30) d'un récipient non représenté dans le dessin. Le scellage entre la couche de scellage (20') et le rebord de scellage (30) du récipient a été exécuté au moyen d'un mors de scellage (28), qui presse l'opercule de fermeture (10) contre le rebord (30) du récipient sous une pression suffisante pour assurer le scellage et à une température de scellage prédéterminée par la combinaison des matières en regard. La température plus élevée lors du scellage a conduit à une force d'adhérence accrue entre les couches de l'opercule (10) dans sa bordure périphérique scellée (13').FIG. 2 represents the closing cap (10) during the sealing operation of the lid (10) on the edge (30) of a container not shown in the drawing. Sealing between the sealing layer (20 ') and the sealing rim (30) of the container has been performed by means of a sealing jaw (28), which presses the closure cap (10) against the rim ( 30) of the container under a pressure sufficient to seal and at a predetermined sealing temperature by the combination of the facing materials. The higher temperature during sealing has led to an increased adhesive force between the layers of the seal (10) in its sealed peripheral edge (13 ').
Les récipients ainsi obturés par opercules (10) selon l'invention, et préalablement remplis d'un produit alimentaire à conditionner, ont pu être stérilisés en autoclave sans contre-pression, et cela, sans que l'on observe sur les récipients ainsi stérilisés une altération quelconque de la plage de scellage ou une séparation quelconque de l'opercule par rapport au récipient.
Pour ouvrir le récipient, comme illustré sur les figures 2 à 4, l'opercule (IQ) est saisi par la languette de déchirage (12) qui est ensuite tirée au-dessus de la partie de l'opercule (10) scellé et restant à enlever.The containers thus closed by lids (10) according to the invention, and previously filled with a food product to be packaged, could be sterilized in an autoclave without back pressure, and this, without it being observed on the containers thus sterilized any alteration of the sealing range or any separation of the seal from the container. To open the container, as illustrated in Figures 2 to 4, the lid (IQ) is grasped by the tear tab (12) which is then pulled over the portion of the lid (10) sealed and remaining to remove.
On a observé que l'effort manuel à exercer sur la languette (12) restait dans la plage d'effort habituelle, allant typiquement de 0,1 daN à 0,6 daN.It has been observed that the manual effort to exert on the tongue (12) remains within the usual stress range, typically ranging from 0.1 daN to 0.6 daN.
Lors de cette opération d'ouverture du récipient, et comme illustré sur la figure 5, une déchirure partant de la pointe de ladite seconde ligne d'affaiblissement (26) se propage d'abord entre la couche extérieure (14) et la partie périphérique (16") de la couche intérieure (16) transversalement à la bordure périphérique scellée (13'), et rejoint, à la sortie de cette bordure (13'), ladite première ligne d'affaiblissement (22) le long de ladite ligne périphérique (22'). En poursuivant le pelage de l'opercule de fermeture (10), on sépare la partie centrale (16') de ladite couche intérieure (16), ladite partie périphérique (16") de ladite couche intérieure (16) restant soudée sur ledit bord (30) du récipient, de manière à donner accès à l'ouverture (32) de remplissage et de prélèvement dudit récipient.During this opening operation of the container, and as illustrated in FIG. 5, a tear extending from the tip of said second weakening line (26) propagates firstly between the outer layer (14) and the peripheral portion (16 ") of the inner layer (16) transversely to the sealed peripheral edge (13 '), and joins, at the exit of this border (13'), said first line of weakness (22) along said line peripheral (22 '). By continuing the peeling of the closing cap (10), the central portion (16') is separated from said inner layer (16), said peripheral portion (16 ") from said inner layer (16). ) remaining welded on said edge (30) of the container, so as to provide access to the opening (32) for filling and sampling said container.
Sur la figure 5, on a tracé le trajet d'une déchirure (34) depuis la pointe (27) de ladite seconde ligne d'affaiblissement (26) jusqu'à l'incision de la couche intérieure (16) formant ladite première ligne d'affaiblissement (22). Dans l'exemple illustré, la déchirure (34) progresse selon une rupture cohésive à l'intérieur de la couche intermédiaire (18). Ce trajet de la déchirure (34) se produit lorsque les forces de cohésion à l'intérieur de la couche intermédiaire (18) sont plus élevées que les forces d'adhésion entre la couche intermédiaire (18) et la couche extérieure (14) ou la couche intérieure (16). Selon la composition de la couche intermédiaire^ 8) et des couches extérieure (14) et intérieure (16), la déchirure (34) dans la bordure périphérique scellée (13') formant la région de scellage peut aussi se propager dans la couche limite entre la couche intermédiaire (18) et les couches extérieure (14) ou intérieure (16), ou éventuellement entre la couche intermédiaire (18) et la couche d'adhésif (19).In FIG. 5, the path of a tear (34) is plotted from the tip (27) of said second line of weakness (26) to the incision of the inner layer (16) forming said first line weakening (22). In the illustrated example, the tear (34) progresses in a cohesive rupture inside the intermediate layer (18). This tear path (34) occurs when the cohesive forces within the intermediate layer (18) are greater than the adhesion forces between the intermediate layer (18) and the outer layer (14) or the inner layer (16). Depending on the composition of the intermediate layer (8) and the outer (14) and inner (16) layers, the tear (34) in the sealed peripheral edge (13 ') forming the sealing region may also propagate in the boundary layer between the intermediate layer (18) and the outer (14) or inner (16) layers, or optionally between the intermediate layer (18) and the adhesive layer (19).
AVANTAGES DE L'INVENTION
L'invention présente de grands avantages.ADVANTAGES OF THE INVENTION The invention has great advantages.
En effet, d'une part, elle est adaptée à un vaste domaine, celui relatif aux conditionnements qui font l'objet d'une stérilisation, ces conditionnements pouvant être de tous types, et principalement métalliques, en verre. Il s'agit généralement du domaine de la conserve de légumes, mais de nombreux autres produits peuvent nécessiter une stérilisation.Indeed, on the one hand, it is adapted to a wide field, that relating to the packages that are the subject of sterilization, these packaging can be of all types, and mainly metal, glass. This is generally the field of vegetable preserves, but many other products may require sterilization.
D'autre part, elle constitue une alternative avantageuse aux moyens utilisés traditionnellement, à la fois :On the other hand, it constitutes an advantageous alternative to the means traditionally used, at the same time:
- par la substitution de matériaux opérée : remplacement de couvercles traditionnels par des opercules,- by the substitution of materials operated: replacement of traditional lids by lids,
- par la technique de fermeture : un thermoscellage est plus simple à mettre en œuvre qu'un sertissage de couvercle,- By the closing technique: a heat seal is easier to implement than a lid crimping,
- par la facilité d'ouverture : en effet, les couvercles métalliques dits à ouverture facile ne sont pas toujours réellement faciles à ouvrir compte tenu de la nécessité d'avoir des incisions dans le métal point trop profondes,- By the ease of opening: indeed, the said metal lids easy opening are not always really easy to open given the need to have incisions in the metal point too deep,
- enfin par le renouvellement de l'image apporté par l'emploi d'opercules en lieu et place des couvercles traditionnels, ce qui peut favoriser l'achat par les consommateurs et constituer ainsi un grand avantage commercial.- finally, by renewing the image brought by the use of operculas in place of traditional lids, which can encourage consumer buying and thus constitute a great commercial advantage.
LISTE DES REPERESLIST OF REFERENCES
Opercule de fermeture 10Closing gate 10
Plage d'obturation 11Shutter range 11
Languette de déchirage 12 Bordure périphérique de scellage 13Stripping tab 12 Peripheral sealing edge 13
Bordure périphérique scellée sur 30 13'Sealed peripheral edge on 30 13 '
Couche extérieure 14Outer layer 14
Couche intérieure 16Inner layer 16
Partie centrale de 16 16' Partie périphérique de 16 16"Central part of 16 16 'Peripheral part of 16 16 "
Couche intermédiaire 18
Couche d'adhésif. 19Intermediate layer 18 Adhesive layer. 19
Agent de scellage 20Sealing agent 20
Couche de scellage extradée ou coextrudée 20'Extruded or coextruded sealing layer 20 '
Première ligne d'affaiblissement 22 Ligne périphérique de 22 22'First line of weakness 22 Peripheral line 22 22 '
Seconde ligne d'affaiblissement 26Second line of weakness 26
Ligne repérée de 26 26'Line marked 26 26 '
Pointe de 26 2726 27 point
Rebord du récipient à obturer 30 Ouverture de remplissage et de prélèvement 32Closure of the container to be closed 30 Filling and sampling opening 32
Déchirure 34
Tear 34
Claims
1. Opercule de fermeture (10), en un matériau flexible multicouche, comprenant une languette de déchirage (12) et une plage d'obturation (11), ledit matériau multicouche comprenant une couche extérieure (14) et une couche intérieure (16) revêtue d'un agent de scellage (20), ledit opercule (10) étant destiné à être scellé, par une bordure périphérique de scellage (13), sur un rebord (30) d'un récipient à obturer, une traction manuelle exercée sur ladite languette dudit opercule (10) scellé sur ledit rebord (30) dudit récipient grâce à une bordure périphérique scellée (13'), entraînant un pelage dudit opercule (10) et une ouverture dudit récipient, caractérisé en ce que : a) la couche intérieure (16) présente une première ligne d'affaiblissement (22) formée le long d'une ligne périphérique (22'), ladite ligne périphérique (22') étant repérée et destinée à être en regard dudit rebord (30), sur sa partie intérieure, lorsque ladite bordure périphérique (13) dudit opercule (10) est scellée audit rebord (30), b) ladite couche extérieure (14) et ladite couche intérieure (16) sont assemblées l'une à l'autre au moyen d'une couche intermédiaire (18) solidarisant lesdites couches extérieure (14) et intérieure (16), ladite couche intermédiaire (18) étant choisie en nature et en épaisseur de manière à permettre une rupture de ladite bordure périphérique scellée (13') dans son épaisseur entre ladite couche extérieure (14) et ladite couche intérieure (16), afin que ladite traction manuelle exercée sur ladite languette (12) entraîne une partie centrale (161) de ladite couche intérieure (16) délimitée par ladite ligne périphérique (22'), de manière à former une ouverture centrale, une partie périphérique (16") de ladite couche intérieure (16) restant scellée audit rebord (30).A closure cap (10) of a multilayer flexible material comprising a tear tab (12) and a shutter pad (11), said multilayer material comprising an outer layer (14) and an inner layer (16). coated with a sealing agent (20), said lid (10) being intended to be sealed, by a peripheral sealing edge (13), on a rim (30) of a container to be closed, a manual pull exerted on said tab of said seal (10) sealed to said rim (30) of said container by a sealed peripheral rim (13 '), causing a peel of said seal (10) and an opening of said container, characterized in that: a) the diaper interior (16) has a first line of weakness (22) formed along a peripheral line (22 '), said peripheral line (22') being marked and intended to be opposite said rim (30), on its inner portion, when said peripheral border said cover (10) is sealed to said flange (30), b) said outer layer (14) and said inner layer (16) are joined to each other by means of an intermediate layer (18). ) solidarisant said outer (14) and inner (16) layers, said intermediate layer (18) being selected in nature and thickness so as to allow a rupture of said sealed peripheral edge (13 ') in its thickness between said outer layer ( 14) and said inner layer (16), so that said manual pull exerted on said tongue (12) drives a central portion (16 1 ) of said inner layer (16) delimited by said peripheral line (22 '), so as to forming a central opening, a peripheral portion (16 ") of said inner layer (16) remaining sealed to said flange (30).
2. Opercule selon la revendication 1 dans lequel ladite couche intérieure (16) comprend une seconde ligne d'affaiblissement (26) formée le long d'une ligne repérée (26') formant une jonction entre ladite languette de déchirure (12) et ladite plage d'obturation (11), ladite ligne repérée (261) étant destinée à être en regard dudit rebord (30), sur sa partie extérieure, de manière à faciliter ladite rupture. The cap of claim 1 wherein said inner layer (16) comprises a second line of weakness (26) formed along a marked line (26 ') forming a junction between said tear tab (12) and said shutter range (11), said marked line (26 1 ) being intended to be opposite said rim (30), on its outer part, so as to facilitate said rupture.
3. Opercule selon la revendication 2 dans lequel ladite seconde ligne d'affaiblissement (26) s'étend sur au moins 50 % de la longueur de ladite ligne repérée (26') typiquement curviligne.The cap of claim 2 wherein said second line of weakness (26) extends at least 50% of the length of said typically curvilinear line (26 ').
4. Opercule selon une quelconque des revendications 1 à 3 dans lequel ladite première ligne d'affaiblissement (22) et ladite seconde ligne d'affaiblissement (26) sont formées par une incision formée dans ladite couche intérieure (16) revêtue dudit agent de scellage (20), au moins à mi-chair, sur une fraction au moins égale à 50 % de l'épaisseur de ladite couche intérieure (16) revêtue dudit agent de scellage (20).A seal according to any one of claims 1 to 3 wherein said first line of weakness (22) and said second line of weakness (26) are formed by an incision formed in said inner layer (16) coated with said sealant At least half of the thickness of said inner layer (16) coated with said sealant (20).
5. Opercule selon la revendication 4 dans lequel ladite incision est formée sur la totalité de l'épaisseur de ladite couche intérieure (16) revêtue dudit agent de scellage (20) et typiquement sur une partie de l'épaisseur de ladite couche intermédiaire (18), de manière à ce qu'une rupture adhésive entre ladite couche intérieure (16) et ladite couche intermédiaire (18) permette de peler ledit opercule (10) en formant ladite ouverture centrale.The cap of claim 4 wherein said incision is formed over the entire thickness of said inner layer (16) coated with said sealant (20) and typically over a portion of the thickness of said intermediate layer (18). ), so that an adhesive break between said inner layer (16) and said intermediate layer (18) allows to peel said seal (10) forming said central opening.
6. Opercule selon une quelconque des revendications 1 à 5 dans lequel ladite couche extérieure (14) comprend un film d'aluminium d'une épaisseur allant de 20 μm à 80 μm, et typiquement d'une épaisseur allant de 45 μm à 65 μm.6. Seal according to any one of claims 1 to 5 wherein said outer layer (14) comprises an aluminum film with a thickness ranging from 20 microns to 80 microns, and typically with a thickness ranging from 45 microns to 65 microns. .
7. Opercule selon la revendication 6 dans lequel ledit film d'aluminium comprend une impression sur sa surface extérieure, ladite impression étant typiquement recouverte d'un vernis protecteur dit de sur-impression.7. The cap according to claim 6 wherein said aluminum film comprises a print on its outer surface, said printing being typically covered with a protective varnish called overprinting.
8. Opercule selon une quelconque des revendications 1 à 7 dans lequel ladite Couche intérieure (16) comprend un film en matière thermoplastique de module de traction au moins égal à 800 MPa, et d'épaisseur allant de 20 μm à 80 μm, et typiquement d'une épaisseur allant de 40 μm à 60 μm. 8. The seal according to any one of claims 1 to 7 wherein said inner layer (16) comprises a thermoplastic film of tensile modulus of at least 800 MPa, and thickness of 20 microns to 80 microns, and typically with a thickness ranging from 40 μm to 60 μm.
9. Opercule selon la revendication 8 dans lequel ledit film en matière thermoplastique est un film en polyoléfme, de préférence en PP, typiquement un PP non orienté, ou en polyester.9. The cap according to claim 8 wherein said film of thermoplastic material is a polyolefin film, preferably PP, typically an unoriented PP, or polyester.
10. Opercule selon une quelconque des revendications 1 à 7 dans lequel ladite couche intérieure (16) comprend un second film d'aluminium d'une épaisseur allant de 20 μm à 80 μm, et typiquement d'une épaisseur allant de 45 μm à 65 μm.10. Seal according to any one of claims 1 to 7 wherein said inner layer (16) comprises a second aluminum film having a thickness of 20 microns to 80 microns, and typically of a thickness ranging from 45 microns to 65 microns. .mu.m.
11. Opercule selon une quelconque des revendications 1 à 10 dans lequel lesdites couches extérieure (14) et intermédiaire (18) sont solidarisées par une couche d'adhésif11. Operacle according to any one of claims 1 to 10 wherein said outer layers (14) and intermediate (18) are secured by a layer of adhesive
(19) avec un grammage allant de 1 à 6 g/m2.(19) with a basis weight ranging from 1 to 6 g / m 2 .
12. Opercule selon une quelconque des revendications 1 à 11 dans lequel ladite couche intermédiaire (18) est une monocouche d'extrusion en matière thermoplastique à base de polyoléfine ou une multicouche de co-extrusion en matière thermoplastique à base de polyoléfine, ladite monocouche ou ladite multicouche présentant un grammage allant de 30 g/m2 à 80 g/m2 et typiquement de 40 g/m2 à 60 g/m2.12. Seal according to any one of claims 1 to 11 wherein said intermediate layer (18) is a polyolefin-based thermoplastic extrusion monolayer or a polyolefin-based thermoplastic coextrusion multilayer, said monolayer or said multilayer having a basis weight ranging from 30 g / m 2 to 80 g / m 2 and typically from 40 g / m 2 to 60 g / m 2 .
13. Opercule selon la revendication 12 dans lequel ladite monocouche ou ladite multicouche sont choisies de manière à solidariser ladite couche intérieure (16) à ladite couche extérieure (14) ou éventuellement à ladite couche d'adhésif (19) et à permettre ladite rupture.13. The dispenser according to claim 12 wherein said monolayer or said multilayer are selected so as to secure said inner layer (16) to said outer layer (14) or possibly to said adhesive layer (19) and to allow said rupture.
14. Opercule selon une quelconque des revendications 1 à 13 dans lequel ledit agent de scellage (20) est formé par une couche de scellage extradée ou coextrudée (20') en matière plastique présentant un grammage allant de 30 g/m2 à 80 g/m2 et typiquement de 40 g/m2 à 60 g/m2.A seal according to any one of claims 1 to 13 wherein said sealant (20) is formed by an extruded or coextruded seal layer (20 ') of plastic having a basis weight of from 30 g / m 2 to 80 g / m 2 and typically 40 g / m 2 to 60 g / m 2 .
15. Opercule selon la revendication 14 dans lequel ladite couche de scellage (20') est choisie pour adhérer sur tout matériau constituant ledit rebord (30), typiquement choisi parmi : le verre, l'aluminium, le fer ou le fer blanc, une matière plastique. The cap according to claim 14 wherein said sealing layer (20 ') is chosen to adhere to any material constituting said flange (30), typically selected from: glass, aluminum, iron or tinplate, a plastic material.
16. Opercule selon une quelconque des revendications 1 à 15 dans lequel ladite rupture, lorsque ladite traction manuelle est exercée sur ladite languette dudit opercule (10) scellé sur ledit rebord (30) dudit récipient, est soit une rupture cohésive de ladite couche intermédiaire (18), soit une rupture adhésive entre ladite couche intérieure (16) et ladite couche intermédiaire (18).The cap according to any one of claims 1 to 15 wherein said rupture, when said manual pull is exerted on said tongue of said seal (10) sealed on said rim (30) of said container, is either a cohesive rupture of said intermediate layer ( 18), an adhesive break between said inner layer (16) and said intermediate layer (18).
17. Opercule selon une quelconque des revendications 1 à 16 dans lequel ladite plage d'obturation (11) présente une forme et un contour extérieur correspondant au contour extérieur dudit rebord, ladite plage d'obturation (11) étant de forme typiquement ronde ou ovale ou polygonale, rectangulaire ou carrée, ladite plage d'obturation (11) présentant une aire allant de 10 cm2 à 400 cm2.17. The dispenser according to any one of claims 1 to 16 wherein said shutter pad (11) has a shape and an outer contour corresponding to the outer contour of said flange, said shutter pad (11) being of typically round or oval shape. or polygonal, rectangular or square, said shutter range (11) having an area ranging from 10 cm 2 to 400 cm 2 .
18. Procédé de fabrication d'opercules selon une quelconque des revendications 1 à 17 dans lequel : a) on approvisionne : al) ladite couche extérieure (14) comprenant ledit film d'aluminium, ledit film d'aluminium comprenant éventuellement sur sa face extérieure, une impression, de préférence recouverte de par un vernis de sur-impression, et éventuellement sur sa face intérieure, ladite couche d'adhésif (19), a2) ladite couche intérieure (16) comprenant ledit film en matière thermoplastique ou ledit second film d'aluminium, b) on assemble lesdites couches extérieure (14) et intérieure (16) en extradant ou co- extrudant ladite couche intermédiaire (18), c) on dépose ledit agent de scellage (20) sur ladite couche intérieure (16) en extradant ou co-extrudant sur ladite couche intérieure (16) une couche de scellage extradée" ou de coextrudée (20'), de manière à obtenir une bande de matériau multicouche, d) on forme une pluralité d'opercules : dl) soit en découpant d'abord les opercules dans ladite bande, et en incisant ensuite les opercules pour former lesdites première et seconde lignes d'affaiblissement, d2) soit en incisant d'abord ladite bande pour former une bande inciséç comprenant lesdites première et seconde lignes d'affaiblissement, et en découpant ensuite les opercules dans ladite bande incisée, lesdits opercules ainsi découpés et incisés étant ensuite disposés en piles.18. A method of manufacturing caps according to any one of claims 1 to 17 wherein: a) supplying: al) said outer layer (14) comprising said aluminum film, said aluminum film optionally comprising on its outer face an impression, preferably coated with an overprint varnish, and optionally on its inner side, said adhesive layer (19), a2) said inner layer (16) comprising said thermoplastic film or said second film of aluminum, b) assembling said outer (14) and inner (16) layers by extruding or coextruding said intermediate layer (18), c) depositing said sealant (20) on said inner layer (16) by extruding or co-extruding on said inner layer (16) an extruded or coextruded sealing layer (20 '), so as to obtain a strip of multilayer material, d) forming a plurality of lids: dl) either by cutting first the lids in said strip, and then incising the lids to form said first and second lines of weakness, d2) or by first incising said strip to form an incised strip comprising said first and second lines of weakness, and then cutting the covers in said incised strip, said caps thus cut and incised then being arranged in stacks.
19. Récipient avec un rebord de récipient (30) délimitant une ouverture de remplissage et de prélèvement (32) fermé par un opercule (10) selon une quelconque des revendications 1 à 17, ledit opercule (10) ayant été scellé audit rebord (30) après chargement d'un produit, typiquement un produit alimentaire, ledit récipient ainsi chargé étant stérilisé ou destiné à être stérilisé.Container with a container rim (30) delimiting a filling and sampling aperture (32) closed by a cover (10) according to any one of claims 1 to 17, said seal (10) having been sealed to said rim (30). ) after loading a product, typically a food product, said container thus loaded being sterilized or intended to be sterilized.
20. Récipient selon la revendication 19 dans lequel au moins ledit rebord (30), et éventuellement ledit récipient, est formé en un matériau choisi parmi : le verre, l'aluminium, le fer ou le fer blanc, une matière plastique.20. Container according to claim 19 wherein at least said flange (30), and possibly said container, is formed of a material selected from: glass, aluminum, iron or tinplate, a plastics material.
21. Récipient selon une quelconque des revendications 19 à 20 dans lequel ledit rebord (30) est un rebord extérieur ou un rebord intérieur. The container of any one of claims 19 to 20 wherein said rim (30) is an outer rim or an inner rim.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT06841837T ATE481335T1 (en) | 2005-12-01 | 2006-12-01 | PEEL-OFF FILM CLOSURE FOR STERILIZABLE CONTAINERS |
EP06841837A EP1963202B1 (en) | 2005-12-01 | 2006-12-01 | Peel-off films for closing sterilizable containers |
DE602006016987T DE602006016987D1 (en) | 2005-12-01 | 2006-12-01 | PULL-OUT CLOSURE FOR STERILIZABLE CONTAINERS |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0512200A FR2894231B1 (en) | 2005-12-01 | 2005-12-01 | PEELABLE OPERATORS FOR SEPARATING A STERILIZABLE CONTAINER |
FR0512200 | 2005-12-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007063226A1 true WO2007063226A1 (en) | 2007-06-07 |
Family
ID=36917314
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2006/002627 WO2007063226A1 (en) | 2005-12-01 | 2006-12-01 | Peel-off films for closing a sterilizable container |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1963202B1 (en) |
AT (1) | ATE481335T1 (en) |
DE (1) | DE602006016987D1 (en) |
FR (1) | FR2894231B1 (en) |
WO (1) | WO2007063226A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012131115A1 (en) * | 2011-04-01 | 2012-10-04 | Tanio, S. A. (Sociedad Unipersonal) | Method for packaging and sterilizing olives and product consisting of olives in brine packaged and sterilized in a metal container |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2407690A1 (en) * | 1973-02-22 | 1974-09-05 | Sprinter Pack Ab | MULTI-LAYER CONTAINER LID |
US5145737A (en) * | 1988-03-04 | 1992-09-08 | Societe Alsacienne D'aluminium | System for closure and subsequent opening of sterilizable containers |
WO2006042940A1 (en) * | 2004-10-19 | 2006-04-27 | Societe Alsaciennne D'aluminium | Metalloplastic multilayered packaging film |
-
2005
- 2005-12-01 FR FR0512200A patent/FR2894231B1/en active Active
-
2006
- 2006-12-01 WO PCT/FR2006/002627 patent/WO2007063226A1/en active Application Filing
- 2006-12-01 DE DE602006016987T patent/DE602006016987D1/en active Active
- 2006-12-01 AT AT06841837T patent/ATE481335T1/en not_active IP Right Cessation
- 2006-12-01 EP EP06841837A patent/EP1963202B1/en not_active Not-in-force
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2407690A1 (en) * | 1973-02-22 | 1974-09-05 | Sprinter Pack Ab | MULTI-LAYER CONTAINER LID |
US5145737A (en) * | 1988-03-04 | 1992-09-08 | Societe Alsacienne D'aluminium | System for closure and subsequent opening of sterilizable containers |
WO2006042940A1 (en) * | 2004-10-19 | 2006-04-27 | Societe Alsaciennne D'aluminium | Metalloplastic multilayered packaging film |
Also Published As
Publication number | Publication date |
---|---|
EP1963202A1 (en) | 2008-09-03 |
ATE481335T1 (en) | 2010-10-15 |
DE602006016987D1 (en) | 2010-10-28 |
FR2894231B1 (en) | 2008-02-01 |
EP1963202B1 (en) | 2010-09-15 |
FR2894231A1 (en) | 2007-06-08 |
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