EP0874766B1 - Use of stretchable and peelable film for the protective packaging of display containers - Google Patents

Use of stretchable and peelable film for the protective packaging of display containers Download PDF

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Publication number
EP0874766B1
EP0874766B1 EP96943839A EP96943839A EP0874766B1 EP 0874766 B1 EP0874766 B1 EP 0874766B1 EP 96943839 A EP96943839 A EP 96943839A EP 96943839 A EP96943839 A EP 96943839A EP 0874766 B1 EP0874766 B1 EP 0874766B1
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EP
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Prior art keywords
film
backing
adhesive
process according
printed
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EP96943839A
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German (de)
French (fr)
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EP0874766A1 (en
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José OLIMAR
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Bemis Monceau SA
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Techy International SA
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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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by associating or interconnecting two or more sheets or blanks
    • B65D75/30—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
    • B65D75/305—Skin packages

Definitions

  • the present invention relates to a method for sealing and vacuum sealing of a presentation packaging of a noble product, in particular of a high feed product quality, using a stretch and peelable film.
  • She also relates to a stretchable and peelable packaging film having the distinction of being printed or intended to be printed in several colors in flexogravure or multi-color gravure printing, particularly in tri- and four-color process as well as the use, in the field skin packaging, stretch film and peelable view of vacuum sealing and sealing a high-quality product presentation packaging quality, especially of a food product.
  • a label printed sticker On this film is affixed a label printed sticker, which aims to convey a advertising message in illustrated or written form. At minimum there are the mandatory information such as : weight, ingredients, barcode and deadline sale.
  • High range products are appropriate, such as selected pieces of meat, slices of smoked ham, pâtés or fillets of fish or game.
  • US-A-3912823 discloses a stretched and printed PET film. However, this film is not complexed to a support welding by means of an adhesive In the document US 3912823, when welding the lower PET film “1" with the upper film in PET “2", the upper film is not of the peelable type. In fact, in the packaging according to US-A-3912823, the lower and upper films must belong to the same family to allow their welding to each other. The weld obtained between said films is permanent, that is, is not peelable. Opening the packaging made of welded PET films requires the use of a sharp object.
  • the present invention consists in selecting a film highly transparent, stretchable and peelable, mono or biaxially oriented and use it for packaging under film and vacuum of noble products, in particular of food products intended to be presented in a prestigious way on a tray or thermoformed tray.
  • the present invention consists in using a highly transparent film for packaging under film and vacuum products, especially food products intended to be presented from prestigious way on a tray, or a ravier thermoformed which is covered with a top strip initially flat and only heated.
  • the stretch film is oriented, printed or intended film to be printed on the back in flexography or multi-color three- or four-color gravure printing, by example based on polyethylene terephthalate of the type Mylar® M45 (coated with PVDC 1 ⁇ ) or Mylar® P25 sold by DuPont de Nemours®.
  • polyethylene terephthalate of the type Mylar® M45 (coated with PVDC 1 ⁇ ) or Mylar® P25 sold by DuPont de Nemours®.
  • the machines used for manufacturing decorative vacuum skin packaging under which used this printed film are type machines MULTIVAC®R530 which include forming stations, ISOPACK® KIT filling and welding.
  • the ionomer can be a coextruded weld intended to form a barrier film, it is in particular of Surlyn®.
  • a method and a machine for making the vacuum sealing and sealing of a packaging of presentation of a noble product, in particular a high quality food product, using a stretch and peelable film are known from the document EP-A-0039056.
  • Such a machine includes as illustrated in Figure 4, a heating, vacuum and welding called "station skin®" ISOPACK® system in which the product to be packaged 5 placed on the lower support 2 slightly thermoformed 14 east vacuum-wrapped with top film 1 initially plan and heated in the station for allow the latter to marry all forms of products to be packaged 5.
  • Figure 5 shows that the upper vacuum sucks the upper film 1 in the dome and that the vacuum created by underneath allows the lower support 2 slightly thermoformed 14 to be well fixed in the mold.
  • Figure 6 shows that the top film is heated by the welding plate.
  • Figures 7 and 8 show that by a discount to the more or less rapid atmosphere of the station, the upper film comes off and hugs all contours of the product to be packaged.
  • the film is welded on all the surface surrounding the Product to be packaged as well as on the contours of the packaging thanks to a plate of peripheral welding specific to the ISOPACK® system.
  • FIG. 9 shows that the weld plate deviates after sealing.
  • Figure 10 shows the full opening of the station, once the packaging process completed.
  • the upper film 1 is guided on its edges lateral, by guide chains 7 from introduction into the vacuum chamber until exit vacuum packaging 3, and the bottom strip 2 is guided by guide chains 4 from its introduction until immediately ahead of the vacuum chamber 9 ( Figure 3).
  • the guide chains 4, 7 have flat fasteners 10 and flat fasteners of the chain guide 4, when releasing the strip lower 2 in front of the empty chamber 9, are tipped apart, laterally from the lower band 2, by a lifting ring 11 which is tapers outward.
  • the upper film 1 is grabbed, on the left and at right, by staple chains and moved to each cycle in advance before by a device training and positioning.
  • a device for corner cutting 12 creates a loose corner on the packaging loosely attached which serves as an opening aid.
  • the lower strip is heated and previously transformed into trays 14.
  • the product 5 to be packed is placed on the tray 14, by hand or automatically.
  • the upper film 1 is unwound by an unwinding system with adjustment of the tension of the movie.
  • Two chains 7 with staples guide the upper film 1 in heating station 6, where it is softened by contact heat.
  • lower and upper films arrive, synchronous and parallel, in a vacuum chamber of a station skin.
  • the soft top film 1 wraps the trays 14 and 5 products emerging from 10 mm at the most of the tray 14.
  • the room is closed and a vacuum is created there.
  • the upper film 1 which is still heated in the dome, is then welded under vacuum to the tray over the entire surface around the product and without wrinkles.
  • the longitudinal cutting devices 15 and 16 and transverse separate individual packages 8 in cutting them out of the film.

Abstract

An oriented film, either complex or non-complex, whose properties include stretchability, tracer printability and peelability. It is perfectly adapted to use in the protective packing and vaccum packing of display containers for high-quality products, particularly foodstuffs.

Description

La présente invention est relative à un procédé pour réaliser l'operculage et le scellage sous vide d'un emballage de présentation d'un produit noble, en particulier d'un produit d'alimentation de haute qualité, à l'aide d'un film étirable et pelable. Elle concerne aussi un film d'emballage étirable et pelable ayant la particularité d'être imprimé ou destiné à être imprimé en plusieurs couleurs en flexogravure ou en héliogravure multicolore, particulièrement en tri- et quadrichromie ainsi que l'utilisation , dans le domaine de l'emballage skin, d'un film étirable et pelable en vue de réaliser l'operculage et le scellage sous vide d'un emballage de présentation d'un produit de haute qualité, en particulier d'un produit d'alimentation.The present invention relates to a method for sealing and vacuum sealing of a presentation packaging of a noble product, in particular of a high feed product quality, using a stretch and peelable film. She also relates to a stretchable and peelable packaging film having the distinction of being printed or intended to be printed in several colors in flexogravure or multi-color gravure printing, particularly in tri- and four-color process as well as the use, in the field skin packaging, stretch film and peelable view of vacuum sealing and sealing a high-quality product presentation packaging quality, especially of a food product.

La vente de produits alimentaires dans les grandes surfaces exige des emballages décoratifs de très haute qualité, qui mettent en évidence de façon convaincante la valeur et la fraícheur des produits.The sale of food products in large areas require very decorative packaging high quality, which highlight so convincing the value and the freshness of the products.

Généralement les produits sont présentés de manière prestigieuse sur une barquette ou un ravier. Ils sont ensuite recouverts d'un film supérieur hautement transparent qui enveloppe les produits comme une seconde peau.Generally the products are presented from prestigious way on a tray or a casserole dish. They are then covered with a top film highly transparent which wraps products like a second skin.

Sur ce film est apposée une étiquette autocollant imprimée, qui a pour but de véhiculer un message publicitaire sous forme illustrée ou écrite. Au minimum y figurent les mentions obligatoires telles que : poids, ingrédients, code à barres et date limite de vente.On this film is affixed a label printed sticker, which aims to convey a advertising message in illustrated or written form. At minimum there are the mandatory information such as : weight, ingredients, barcode and deadline sale.

Sont appropriés des produits de haute gamme, tels que morceaux de viande sélectionnés, tranches de jambon fumé, pâtés ou filets de poissons ou de gibier.High range products are appropriate, such as selected pieces of meat, slices of smoked ham, pâtés or fillets of fish or game.

Les films de matière plastique mis en oeuvre doivent posséder certaines propriétés thermiques et mécaniques et répondre au moins aux exigences suivantes:

  • bonne imperméabilité aux gaz et à la vapeur d'eau afin d'assurer une longue conservation;
  • ouverture facile de la soudure malgré l'exigence d'une grande étanchéité de la soudure;
  • présentation prestigieuse;
  • brillance élevée;
  • état de surface permettant le collage des étiquettes autocollantes imprimées, et
  • stabilité thermique élevée.
The plastic films used must have certain thermal and mechanical properties and meet at least the following requirements:
  • good impermeability to gases and water vapor to ensure long storage;
  • easy opening of the weld despite the requirement for a high seal of the weld;
  • prestigious presentation;
  • high gloss;
  • surface finish allowing the sticking of printed self-adhesive labels, and
  • high thermal stability.

On connaít par US-A-3912823 un film en PET étiré et imprimé. Toutefois, ce film n'est pas complexé à un support soudant au moyen d'un adhésif Dans le document US 3912823, lors de la soudure du film inférieur en PET "1" avec le film supérieur en PET "2", le film supérieur n'est pas du type pelable. En fait, dans l'emballage suivant US-A-3912823, les films inférieur et supérieur doivent appartenir à la même famille pour permettre leur soudure l'un à l'autre. La soudure obtenue entre lesdits films est permanente, c'est-à-dire n'est pas pelable. L'ouverture de l'emballage constitué de films soudés en PET nécessite l'emploi d'un objet tranchant. US-A-3912823 discloses a stretched and printed PET film. However, this film is not complexed to a support welding by means of an adhesive In the document US 3912823, when welding the lower PET film "1" with the upper film in PET "2", the upper film is not of the peelable type. In fact, in the packaging according to US-A-3912823, the lower and upper films must belong to the same family to allow their welding to each other. The weld obtained between said films is permanent, that is, is not peelable. Opening the packaging made of welded PET films requires the use of a sharp object.

On connaít par le document EP-A-0328245, l'utilisation de films skin coextrudés à base de polyéthylène pelable et barrière utilisés comme emballages de présentation de viandes et autres denrées alimentaires.We know from document EP-A-0328245, the use of coextruded skin films based on peelable polyethylene and barrier used as display packaging for meats and other commodities food.

Ces films coextrudés, de par leur structure relativement souple leur permettent d'entourer parfaitement les contours des produits à emballer sans présenter la moindre ride. Ils forment une barrière efficace contre les gaz.These coextruded films, by their structure relatively flexible allow them to surround perfectly the contours of the products to be packaged without show any wrinkles. They form a barrier effective against gases.

A cause de leur grande élasticité, liée à leur processus de fabrication ainsi gu'à la nature des résines utilisées, ces matériaux n'ont pas les caractéristiques nécessaires et suffisantes pour être imprimés car, par exemple, l'impression en héliogravure multicolore en tri- ou quadrichromie exige l'utilisation d'un support imprimable ayant une bonne stabilité dimensionnelle sur machine d'impression. Cette stabilité dimensionnelle permet d'avoir lors de l'impression, un repérage parfait des différentes couleurs et la constance d'un pas mécanique imposé par la machine d'emballage.Because of their great elasticity, linked to their manufacturing process as well as to the nature of resins used, these materials do not have the necessary and sufficient characteristics to be printed because, for example, rotogravure printing multicolored in three- or four-color requires the use a printable medium with good stability dimensional printing machine. This dimensional stability allows to have when printing, perfect identification of the different colors and the constancy of a mechanical step imposed by the packaging machine.

En conséquence, les supports fabriqués Par coextrusion et utilisés à ce jour dans les applications "skin" de par leur grand pouvoir d'allongement, les rendent inaptes à l'impression en héliogravure décrite ci-dessus.As a result, the supports manufactured by coextrusion and used to date in applications "skin" due to their great elongation power, make it unsuitable for the gravure printing described above.

De plus, la tenue du pas d'impression sur la machine de conditionnement est rès aléatoire.In addition, the holding of the printing step on the packaging machine is very random.

Il faut encore noter que ces films ne peuvent être imprimés qu'en surface, ce qui diminue fortement leur brillance ainsi que l'attrait commercial du produit. On relève également la difficulté d'y faire adhérer convenablement des encres d'imprimerie.It should also be noted that these films cannot be printed only on the surface, which greatly decreases their brilliance as well as the commercial appeal of product. We also note the difficulty of doing properly adhere to printing inks.

De ce fait, l'obligation d'utiliser des étiquettes autocollantes imprimées à apposer sur le support pour le rendre commercialement plus attractif et y indiquer les mentions imposées par la loi force l'utilisateur final à investir sur ces lignes de production dans des étiqueteuses automatiques qui entraínent un surcroít de travail considérable et affectent les cadences de production, notamment par les arrêts lors des changements de bobine d'étiquettes. Therefore, the obligation to use printed self-adhesive labels to affix on the support to make it commercially more attractive and indicate there the mentions imposed by law the end user to invest on these lines of production in automatic labeling machines which result in considerable extra work and affect production rates, particularly by stops when changing label rolls.

Or, dans le domaine du skin, la demande en matériau imprimable en héliogravure multicolore, en particulier en tri- ou quadrichromie est très forte. De plus, on connaít par le brevet WO 95/21105 l'utilisation d'un film orienté ou non, extrudé ou coextrudé à base de PVA (Polyvinyl Alkohol), en tant que matériau skin pour le conditionnement de produits non alimentaires.However, in the field of skin, the demand for multi-color rotogravure printable material, particularly in three- or four-color printing is very strong. In addition, we know from patent WO 95/21105 the use of a film oriented or not, extruded or PVA (Polyvinyl Alkohol) coextruded, as skin material for the packaging of non- food.

Le document décrit que certains composants sont solubles dans l'eau et il enseigne l'utilisation d'un support inférieur poreux et de ce fait non barrière aux gaz.The document describes that certain components are water soluble and it teaches the use of a porous lower support and therefore non-barrier to gas.

On peut dès lors estimer qu'un tel système n'est pas à même de préserver des produits alimentaires ayant une durée de conservation de 21 à 90 jours et ce à des degrés d'humidité ambiante très élevés et des températures de stockage compris entre 4 et 7° C.We can therefore consider that such a system is unable to preserve food with a shelf life of 21 to 90 days and this at very high ambient humidity levels and storage temperatures between 4 and 7 ° C.

A fortiori, le fait que ce matériau soit soluble dans l'eau à une température de 40 à 100 °C, et de préférence dans l'eau froide, le rend inapte à l'utilisation en milieu humide.A fortiori, the fact that this material is soluble in water at a temperature of 40 to 100 ° C, and preferably in cold water, makes it unsuitable for use in a humid environment.

A la lumière de l'ensemble des limites techniques mises en évidence par les matériaux repris ci-dessus ainsi que d'une demande grandissante à produire un matériau "skin" imprimé repéré" pour l'utilisation entre autre dans le domaine alimentaire, la présente invention consiste à sélectionner un film hautement transparent, étirable et pelable, mono ou biorienté et à l'utiliser pour l'emballage sous pellicule et sous vide de produits nobles, en particulier de produits alimentaires destinés à être présentés de manière prestigieuse sur un plateau ou une barquette thermoformée.In light of all the limits techniques highlighted by the materials used above as well as a growing demand to produce a printed "skin" marked material for use among others in the food sector, the present invention consists in selecting a film highly transparent, stretchable and peelable, mono or biaxially oriented and use it for packaging under film and vacuum of noble products, in particular of food products intended to be presented in a prestigious way on a tray or thermoformed tray.

La présente invention consiste à utiliser un film hautement transparent pour l'emballage sous pellicule et sous vide de produits, en particulier de produits alimentaires destinés à être présentés de manière prestigieuse sur une barquette, ou un ravier thermoformé que l'on recouvre d'une bande supérieure initialement plane et seulement chauffée.The present invention consists in using a highly transparent film for packaging under film and vacuum products, especially food products intended to be presented from prestigious way on a tray, or a ravier thermoformed which is covered with a top strip initially flat and only heated.

Suivant une particularité de l'invention, le film étirable est un film orienté, imprimé ou destiné à être imprimé au verso en flexographie ou en héliogravure multicolore en tri- ou quadrichromie, par exemple à base de polyéthylène téréphtalate du type Mylar® M45 (enduit de PVDC 1µ) ou Mylar® P25 commercialisé par DuPont de Nemours®. On peut également utiliser un film de polypropylène orienté ou de nylon orienté par étirage monoaxial ou biaxial.According to a feature of the invention, the stretch film is oriented, printed or intended film to be printed on the back in flexography or multi-color three- or four-color gravure printing, by example based on polyethylene terephthalate of the type Mylar® M45 (coated with PVDC 1µ) or Mylar® P25 sold by DuPont de Nemours®. We can also use oriented polypropylene or nylon film oriented by monoaxial or biaxial stretching.

Les machines utilisées pour la fabrication d'emballages skin décoratifs sous vide sous lesquels est utilisé ce film imprimé sont des machines de type MULTIVAC®R530 qui comprennent des postes de formage, de remplissage et de soudure de type KIT ISOPACK®.The machines used for manufacturing decorative vacuum skin packaging under which used this printed film are type machines MULTIVAC®R530 which include forming stations, ISOPACK® KIT filling and welding.

Suivant un développement ultérieur de l'invention, le film présente l'une des structures suivantes :

  • film étirable orienté / impression verso / adhésif / polyéthylène;
  • film étirable orienté / impression verso / adhésif / polyéthylène;
  • film étirable orienté / impression verso / adhésif / ionomère;
  • film étirable orienté / adhésif / polyéthylène;
  • film étirable orienté / adhésif / coextrudé soudant;
  • film étirable orienté / impression / adhésif / ionomère.
According to a further development of the invention, the film has one of the following structures:
  • oriented stretch film / back printing / adhesive / polyethylene;
  • oriented stretch film / back printing / adhesive / polyethylene;
  • oriented stretch film / back printing / adhesive / ionomer;
  • oriented stretch film / adhesive / polyethylene;
  • oriented stretch / adhesive / coextruded welding film;
  • oriented stretch film / printing / adhesive / ionomer.

Le ionomère peut être un coextrudé soudant destiné à former un film-barrière, il s'agit en particulier de Surlyn®.The ionomer can be a coextruded weld intended to form a barrier film, it is in particular of Surlyn®.

Ces caractéristiques et d'autres particularités et détails de l'invention apparaítront au cours de la description détaillée ci-après d'une forme de réalisation préférée de l'invention qui fait référence aux dessins ci-annexés donnés à titre illustratif et non limitatif.These and other features and details of the invention will become apparent during the detailed description below of a form of preferred embodiment of the invention which refers to the attached drawings given by way of illustration and not limiting.

Dans ces dessins :

  • la figure 1 est une vue en perspective d'un emballage skin sous vide dont le film supérieur est réalisé à l'aide d'un film à base de polyester selon l'invention;
  • la figure 2 est une vue schématique d'une machine d'emballage skin sous vide, du type Multivac® mettant en oeuvre un film supérieur à base de polyester;
  • la figure 3 est une vue en perspective de la machine illustrée dans la figure 2;
  • la figure 4 montre à plus grande échelle le poste de chauffage de soudure et de vide d'un système ISOPACK® de la machine montrée dans les figures 2 et 3;
  • les figures 5 à 10 illustrent schématiquement les diverses étapes du système ISOPACK® utilisant le film selon l'invention.
In these drawings:
  • Figure 1 is a perspective view of a vacuum skin package whose upper film is made using a polyester film according to the invention;
  • FIG. 2 is a schematic view of a skin packaging machine under vacuum, of the Multivac® type using an upper film based on polyester;
  • Figure 3 is a perspective view of the machine illustrated in Figure 2;
  • Figure 4 shows on a larger scale the welding and vacuum heating station of an ISOPACK® system of the machine shown in Figures 2 and 3;
  • Figures 5 to 10 schematically illustrate the various steps of the ISOPACK® system using the film according to the invention.

Dans les diverses figures, les mêmes signes de référence désignent des éléments identiques ou analogues.In the various figures, the same signs of reference denote identical elements or analogues.

Un procédé et une machine pour réaliser l'operculage et le scellage sous vide d'un emballage de présentation d'un produit noble, en particulier d'un produit d'alimentation de haute qualité, à l'aide d'un film étirable et pelable sont connus par le document EP-A-0039056. Une telle machine comprend comme illustré dans la figure 4, un poste de chauffe, de vide et de soudure appelée "station skin®" système ISOPACK® dans lequel le produit à conditionner 5 disposé sur le support inférieur 2 légèrement thermoformé 14 est enveloppé sous vide à l'aide d'un film supérieur 1 initialement plan et chauffé dans la station pour permettre à ce dernier d'épouser toutes les formes de produits à conditionner 5.A method and a machine for making the vacuum sealing and sealing of a packaging of presentation of a noble product, in particular a high quality food product, using a stretch and peelable film are known from the document EP-A-0039056. Such a machine includes as illustrated in Figure 4, a heating, vacuum and welding called "station skin®" ISOPACK® system in which the product to be packaged 5 placed on the lower support 2 slightly thermoformed 14 east vacuum-wrapped with top film 1 initially plan and heated in the station for allow the latter to marry all forms of products to be packaged 5.

La figure 5 montre que le vide supérieur aspire le film supérieur 1 dans le dôme et que le vide créé par dessous permet au support inférieur 2 légèrement thermoformé 14 d'être bien fixé dans le moule.Figure 5 shows that the upper vacuum sucks the upper film 1 in the dome and that the vacuum created by underneath allows the lower support 2 slightly thermoformed 14 to be well fixed in the mold.

La figure 6 montre que le film supérieur est chauffé par la plaque de soudure.Figure 6 shows that the top film is heated by the welding plate.

Les figures 7 et 8 montrent que par une remise à l'atmosphère plus ou moins rapide de la station, le film supérieur se détache et épouse tous les contours du produit à emballer.Figures 7 and 8 show that by a discount to the more or less rapid atmosphere of the station, the upper film comes off and hugs all contours of the product to be packaged.

Durant cette phase, le film est soudé sur toute la surface entourant le Produit à conditionner ainsi que sur les contours de l'emballage grâce à une plaque de soudure périphérique propre au système ISOPACK®.During this phase, the film is welded on all the surface surrounding the Product to be packaged as well as on the contours of the packaging thanks to a plate of peripheral welding specific to the ISOPACK® system.

La figure 9 montre que la plaque de soudure s'écarte après scellage.Figure 9 shows that the weld plate deviates after sealing.

La figure 10 montre l'ouverture complète de la station, une fois le processus de conditionnement terminé.Figure 10 shows the full opening of the station, once the packaging process completed.

Le film supérieur 1 est guidé, sur ses bords latéraux, par des chaínes de guidage 7 depuis l'introduction dans la chambre à vide jusqu'à la sortie de l'emballage sous vide 3, et la bande inférieure 2 est guidée par des chaínes de guidage 4 depuis son introduction jusqu'à immédiatement en avant de la chambre à vide 9 (figure 3).The upper film 1 is guided on its edges lateral, by guide chains 7 from introduction into the vacuum chamber until exit vacuum packaging 3, and the bottom strip 2 is guided by guide chains 4 from its introduction until immediately ahead of the vacuum chamber 9 (Figure 3).

Les chaínes de guidage 4, 7 possèdent des attaches planes 10 et les attaches planes de la chaíne de guidage 4, lors de la libération de la bande inférieure 2 en avant de la chambre vide 9, sont écartées par basculement, latéralement à partir de la bande inférieure 2, par une bague de relevage 11 qui se rétrécit d'une manière conique vers l'extérieur.The guide chains 4, 7 have flat fasteners 10 and flat fasteners of the chain guide 4, when releasing the strip lower 2 in front of the empty chamber 9, are tipped apart, laterally from the lower band 2, by a lifting ring 11 which is tapers outward.

Le film supérieur 1 est saisi, à gauche et à droite, par des chaínes à agrafes et déplacé à chaque cycle en progression avant par un dispositif d'entraínement et de positionnement. Un dispositif de découpe de coins 12 réalise à l'emballage un coin lâche peu fixé qui sert d'aide à l'ouverture. Dans la station de formage 13 la bande inférieure est chauffée et préalablement transformé en barquettes 14. Le produit 5 à emballer est placé sur la barquette 14, à la main ou automatiquement. Le film supérieur 1 est déroulé par un système de déroulement avec réglage de la tension du film. Deux chaínes 7 à agrafes assurent le guidage du film supérieur 1 dans la station de chauffage 6, où il est ramolli par la chaleur à contact. Au cycle suivant, les films inférieur et supérieur arrivent, synchrones et parallèles, dans une chambre à vide d'une station skin. Ici, le film supérieur 1 mou enveloppe les barquettes 14 et les produits 5 qui émergent de 10 mm au plus de la barquette 14.The upper film 1 is grabbed, on the left and at right, by staple chains and moved to each cycle in advance before by a device training and positioning. A device for corner cutting 12 creates a loose corner on the packaging loosely attached which serves as an opening aid. In the station forming 13 the lower strip is heated and previously transformed into trays 14. The product 5 to be packed is placed on the tray 14, by hand or automatically. The upper film 1 is unwound by an unwinding system with adjustment of the tension of the movie. Two chains 7 with staples guide the upper film 1 in heating station 6, where it is softened by contact heat. In the next cycle, lower and upper films arrive, synchronous and parallel, in a vacuum chamber of a station skin. Here, the soft top film 1 wraps the trays 14 and 5 products emerging from 10 mm at the most of the tray 14.

La chambre est fermée et le vide y est réalisé. Le film supérieur 1, qui est encore chauffé au dôme, est alors soudé sous vide à la barquette sur toute la surface autour du produit et sans rides. Les dispositifs de découpe 15 et 16 longitudinaux et transversaux séparent les emballages individuels 8 en les découpant du film.The room is closed and a vacuum is created there. The upper film 1, which is still heated in the dome, is then welded under vacuum to the tray over the entire surface around the product and without wrinkles. The longitudinal cutting devices 15 and 16 and transverse separate individual packages 8 in cutting them out of the film.

Claims (9)

  1. Process for closing off and vacuum-sealing a package (2) for presenting a food product (5) by means of a stretchable water-insoluble film, the said film being thermally welded to the package, characterized in that a water-insoluble stretched film having a front side and a rear side facing the package is used, the said stretched film being printed on its rear side and complexed by means of an adhesive to a weldable backing and in that the backing complexed to the film is welded to the package in order to obtain a peelable film.
  2. Process according to Claim 1, characterized in that the adhesive is a water-based adhesive.
  3. Process according to Claim 1 or 2, characterized in that the weldable backing is a polyethylene backing, a coextruded backing or an ionomer backing.
  4. Process according to one of the preceding claims, characterized in that the film undergoes biaxial mechanical stretching before being printed on its rear side.
  5. Process according to Claim 4, characterized in that the film is a polyester, polyamide or polypropylene film.
  6. Process according to Claim 5, characterized in that the stretched film has a thickness of between 10 and 50 µm.
  7. Process according to one of Claims 1 to 6, characterized in that the stretched and printed film is complexed to the weldable backing by means of an adhesive and has one of the following structures:
    stretched film/printing on the rear of the film/adhesive/weldable polyethylene backing;
    stretched film/printing on the rear of the film/adhesive/weldable coextruded backing;
    stretched film/printing on the rear of the film/adhesive/ionomer backing.
  8. Process according to Claim 7, characterized in that the adhesive is a water-based adhesive.
  9. Process according to any one of Claims 1 to 8, characterized in that the stretched film (1) is printed on the rear side by flexography or multicolour registered gravure printing.
EP96943839A 1996-01-11 1996-12-30 Use of stretchable and peelable film for the protective packaging of display containers Expired - Lifetime EP0874766B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE9600024A BE1009995A5 (en) 1996-01-11 1996-01-11 Using a stretch film and bonded for sealing of a presentation of packaging.
BE9600024 1996-01-11
PCT/BE1996/000138 WO1997025258A1 (en) 1996-01-11 1996-12-30 Use of stretchable and peelable film for the protective packaging of display containers

Publications (2)

Publication Number Publication Date
EP0874766A1 EP0874766A1 (en) 1998-11-04
EP0874766B1 true EP0874766B1 (en) 1999-09-15

Family

ID=3889465

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96943839A Expired - Lifetime EP0874766B1 (en) 1996-01-11 1996-12-30 Use of stretchable and peelable film for the protective packaging of display containers

Country Status (11)

Country Link
EP (1) EP0874766B1 (en)
JP (1) JP2000502977A (en)
AT (1) ATE184566T1 (en)
AU (1) AU1362097A (en)
BE (1) BE1009995A5 (en)
CA (1) CA2240995A1 (en)
DE (1) DE69604306T2 (en)
DK (1) DK0874766T3 (en)
ES (1) ES2138396T3 (en)
GR (1) GR3032088T3 (en)
WO (1) WO1997025258A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1398149A1 (en) 2002-09-16 2004-03-17 Cryovac, Inc. Printable thermoplastic multilayer laminate for vacuum skin packaging applications

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2912663T3 (en) * 2018-06-11 2022-05-26 Multivac Haggenmueller Kg Film packaging as well as method and sealing station for the production of a film packaging

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3912823A (en) * 1973-02-23 1975-10-14 Du Pont Vacuum skin-package for cooking food
US4012888A (en) * 1975-07-31 1977-03-22 Packaging Coordinators, Inc. Packaging apparatus for forming, filling and sealing receptacles
GB2145363B (en) * 1983-08-23 1986-09-24 Grace W R & Co Vacuum skin package
GB2181399B (en) * 1985-10-12 1989-09-13 Donald Charles Alfred Ives Vacuum skin packaging
EP0285680A1 (en) * 1987-04-04 1988-10-12 E. Th. Noack Inh. Ing. Leopold Masino Verpackungsmaschinen Marking apparatus
US4927691A (en) * 1987-10-16 1990-05-22 W. R. Grace & Co.-Conn. Implosion resistant films
EP0488452A3 (en) * 1990-11-29 1992-07-29 Safta S.P.A. Multilayer composite material, in particular multilayer thermoplastic film, and relevant formed articles
GB9401893D0 (en) * 1994-02-01 1994-03-30 Aquasol Ltd New packages

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1398149A1 (en) 2002-09-16 2004-03-17 Cryovac, Inc. Printable thermoplastic multilayer laminate for vacuum skin packaging applications

Also Published As

Publication number Publication date
ATE184566T1 (en) 1999-10-15
EP0874766A1 (en) 1998-11-04
JP2000502977A (en) 2000-03-14
AU1362097A (en) 1997-08-01
CA2240995A1 (en) 1997-07-17
DK0874766T3 (en) 2000-04-03
DE69604306D1 (en) 1999-10-21
BE1009995A5 (en) 1997-11-04
GR3032088T3 (en) 2000-03-31
ES2138396T3 (en) 2000-01-01
DE69604306T2 (en) 2000-02-10
WO1997025258A1 (en) 1997-07-17

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