EP0116535B1 - Isothermal package material - Google Patents

Isothermal package material Download PDF

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Publication number
EP0116535B1
EP0116535B1 EP82902525A EP82902525A EP0116535B1 EP 0116535 B1 EP0116535 B1 EP 0116535B1 EP 82902525 A EP82902525 A EP 82902525A EP 82902525 A EP82902525 A EP 82902525A EP 0116535 B1 EP0116535 B1 EP 0116535B1
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EP
European Patent Office
Prior art keywords
sheet
adhesive
pct
self
outer sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
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EP82902525A
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German (de)
French (fr)
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EP0116535A1 (en
Inventor
Jean-Pierre Weber
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Individual
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Individual
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Priority to AT82902525T priority Critical patent/ATE19766T1/en
Publication of EP0116535A1 publication Critical patent/EP0116535A1/en
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Publication of EP0116535B1 publication Critical patent/EP0116535B1/en
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
    • B65D81/3888—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation wrappers or flexible containers, e.g. pouches, bags
    • B65D81/3897—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation wrappers or flexible containers, e.g. pouches, bags formed of different materials, e.g. laminated or foam filling between walls

Definitions

  • temperatures are very different depending on the nature and composition of the products. They are, for example, + 8 ° C for butter and cheese, + 13 ° C for meat and fish, approximately + 42 ° C for pre-cooked or pre-cooked foods to be eaten hot (roast chickens, hot hams, etc.), from -8 ° C for frozen food products, the latter temperature being the one above which these products cannot be refrozen without danger to the health of consumers, of around + 18 ° C for certain pharmaceutical products (suppositories for example), around + 20 ° C for flowers and seed pieces, etc.
  • the subject of the present invention is a material making it possible to produce isothermal and hermetic packaging capable of maintaining these products at temperatures which are satisfactory from this point of view during a relatively long time interval. In other words, their temperature only tends very slowly towards their critical temperature, which makes it possible to keep these products for several hours (from 2 to 12 hours depending on the case), at temperatures for which they are suitable for consumption. or their use, these durations largely covering transport times.
  • the material according to the present invention consists of a flexible sheet having a side with high reflecting power and comprising a layer of material with low thermal conduction power, for example plastic foam or non-woven textile fibers. Such a material is described in French patent No. 2345295 to REVERCHON-ROCAPHANE.
  • the packaging is obtained by wrapping the sheet one or more times around the product to be stored, the reflecting face being placed outside, then closed by independent means or provided for this purpose, by tightening together the juxtaposed parts of the longitudinal edges and applying the free transverse edge against the body of the package.
  • These closing means may advantageously be constituted by self-adhesive surfaces.
  • the packaging thus produced has, in addition to the qualities noted above, the fact of providing good protection against shocks.
  • the material according to the invention has the advantage, over isothermal packaging materials of the above-mentioned type provided with self-adhesive closing means, of having a very simple structure, of being easy to manufacture and of a relatively low cost price, and yet very reliable.
  • This packaging in which the closure means consist of self-adhesive surfaces, which has one of the faces of the flexible sheet, intended to be applied by pressure against the corresponding surfaces of the other side of this sheet, when the packaging is finished, is characterized by the fact that said sheet has an adhesive face partially covered by the layer with low thermal conduction power so that the uncoated surfaces form said adhesive surfaces.
  • the isothermal packaging material shown in the drawing consists of a flexible rectangular sheet 10, made of polyvinyl, 40 cm wide, 90 cm long and 0.5 mm thick, white and shiny on its outer face and self-adhesive on its inner face, and with a layer of plastic foam 11, with open cells, 5 mm thick, self-adhesive on the inner face of the sheet.
  • This layer 11 is discontinuous so as to reveal the adhesive face of the sheet 10 along a transverse area 12 and along two longitudinal strips 13.
  • Figures 2 and 3 show how the sheet illustrated in Figure 1 was used to package a 400g ice cream block.
  • the sheet was wrapped three times around the pad and the packaging thus obtained was closed by pressing the adhesive pad 12 and the adhesive strips 13 against the corresponding surfaces of the glossy face of the sheet 10.
  • This package placed in an ambient environment at a temperature of + 22 ° C, keeps the ice cream block, initially at a temperature of -20 ° C for about 2 hours before it reaches the temperature of - 8 ° C from which the cream begins to melt (Figure 4).
  • This performance is very much superior to that of the tote bags or aluminum bags found in supermarkets, packaging that only keeps the same pavement under the same conditions for barely an hour.
  • Sheets such as that shown in FIG. 1, will advantageously be produced in series and continuously, stored in rolls and cut up as and when required by cutting the sheets one after the other.
  • the packaging sheet shown in the drawing is more specifically intended for prepackaged products.
  • an additional inner layer may be provided. keep quiet, partially covering the foam layer, for example aluminum foil, PVC film, greasy paper, to protect the product and prevent it from entering the foam.
  • This additional layer can be glued to the foam layer only along one edge so as not to be wrinkled.
  • the flexible sheet may include a non-glued area contiguous to the area 12 facilitating the gripping of the edge for opening the packaging.
  • sealing and thermal insulation of the edges of the packaging are reinforced by the continuous bonding zone formed by the pad 12 and the strips 13 and by the pressure which the foam undergoes at this zone.

Abstract

PCT No. PCT/CH82/00103 Sec. 371 Date Apr. 27, 1984 Sec. 102(e) Date Apr. 27, 1984 PCT Filed Aug. 30, 1982 PCT Pub. No. WO84/00943 PCT Pub. Date Mar. 15, 1984.Sheet material for making a sealed isothermal package comprises a flexible outer sheet of polyvinyl having a shiny reflective outer surface. The entire inner surface of the outer sheet is coated with pressure sensitive adhesive. An inner heat insulating layer of plastic foam is bonded to the inner side of the outer sheet by the adhesive. The inner insulating layer is of lesser area than the outer sheet so as to leave marginal areas of the adhesive surface of the outer sheet exposed for adhesion to underlying portions of the sheet material when the sheet material is wrapped around an object to be packaged. The insulating layer is of sufficient thickness that when the sheet material is wound in a roll, the exposed adhesive marginal areas are spaced apart so that no release backing material is required.

Description

Des millions d'êtres humains sont chaque jour confrontés au problème du transport de certains produits frais ou surgelés, notamment des produits alimentaires, pharmaceutiques, végétaux, dont la qualité, le goût ou l'aspect s'altèrent rapidement lorsqu'ils ne sont pas maintenus pendant la durée de leur transport en dessous ou en dessus de certaines températures dites critiques.Millions of human beings are confronted every day with the problem of the transport of certain fresh or frozen products, in particular food products, pharmaceuticals, plants, whose quality, taste or appearance deteriorate quickly when they are not kept for the duration of their transport below or above certain so-called critical temperatures.

Ces températures sont très différentes selon la nature et la composition des produits. Elles sont, par exemple, de +8° C pour le beurre et le fromage, de +13°C pour la viande et le poisson, d'environ +42° C pour les aliments précuits ou précuisinés à consommer chauds (poulets rôtis, jambons chauds, etc.), de -8°C pour des produits alimentaires surgelés, cette dernière température étant celle au-dessus de laquelle ces produits ne peuvent pas être recongelés sans danger pour la santé des consommateurs, d'environ +18°C pour certains produits pharmaceutiques (suppositoires par exemple), d'environ +20°C pour les fleurs et les plantons, etc.These temperatures are very different depending on the nature and composition of the products. They are, for example, + 8 ° C for butter and cheese, + 13 ° C for meat and fish, approximately + 42 ° C for pre-cooked or pre-cooked foods to be eaten hot (roast chickens, hot hams, etc.), from -8 ° C for frozen food products, the latter temperature being the one above which these products cannot be refrozen without danger to the health of consumers, of around + 18 ° C for certain pharmaceutical products (suppositories for example), around + 20 ° C for flowers and seed pieces, etc.

La présente invention a pour objet un matériau permettant de réaliser des emballages isothermiques et hermétiques capables de maintenir ces produits à des températures satisfaisantes de ce point de vue durant un intervalle de temps relativement long. En d'autres termes, leur température ne tend que très lentement vers leur température critique, ce qui permet de conserver ces produits durant plusieurs heures (de 2 à 12 heures selon les cas), à des températures pour lesquelles ils sont propres à la consommation ou à leur utilisation, ces durées couvrant largement les temps de transport. Le matériau selon la présente invention est constitué par une feuille souple présentant une face à haut pouvoir réfléchissant et comportant une couche de matière à faible pouvoir de conduction thermique, par exemple de la mousse plastique ou des fibres textiles non tissées. Un tel matériau est décrit dans le brevet français N° 2345295 de REVERCHON-ROCAPHANE.The subject of the present invention is a material making it possible to produce isothermal and hermetic packaging capable of maintaining these products at temperatures which are satisfactory from this point of view during a relatively long time interval. In other words, their temperature only tends very slowly towards their critical temperature, which makes it possible to keep these products for several hours (from 2 to 12 hours depending on the case), at temperatures for which they are suitable for consumption. or their use, these durations largely covering transport times. The material according to the present invention consists of a flexible sheet having a side with high reflecting power and comprising a layer of material with low thermal conduction power, for example plastic foam or non-woven textile fibers. Such a material is described in French patent No. 2345295 to REVERCHON-ROCAPHANE.

L'emballage est obtenu en enroulant une ou plusieurs fois la feuille autour du produit à conserver, la face réfléchissante étant placée à l'extérieur, puis fermé par des moyens indépendants ou prévus à cet effet, en serrant ensemble les parties juxtaposées des bords longitudinaux et en appliquant le bord transversal libre contre le corps de l'emballage.The packaging is obtained by wrapping the sheet one or more times around the product to be stored, the reflecting face being placed outside, then closed by independent means or provided for this purpose, by tightening together the juxtaposed parts of the longitudinal edges and applying the free transverse edge against the body of the package.

Ces moyens de fermeture pourront être avantageusement constitués par des surfaces autocollantes.These closing means may advantageously be constituted by self-adhesive surfaces.

Les emballages ainsi réalisés présentent, outre les qualités relevées ci-dessus le fait d'offrir une bonne protection contre les chocs. Le matériau selon l'invention possède l'avantage, sur les matériaux d'emballage isothermiques du type susmentionné dotés de moyens de fermeture autocollants de présenter une structure très simple, d'être facile à fabriquer et d'un prix de revient relativement bas, et cependant très fiable.The packaging thus produced has, in addition to the qualities noted above, the fact of providing good protection against shocks. The material according to the invention has the advantage, over isothermal packaging materials of the above-mentioned type provided with self-adhesive closing means, of having a very simple structure, of being easy to manufacture and of a relatively low cost price, and yet very reliable.

Cet emballage, dans lequel les moyens de fermeture sont constitués par des surfaces autocollantes, que présente l'une des faces de la feuille souple, destinées à être appliquées par pression contre les surfaces correspondantes de l'autre face de cette feuille, lorsque l'emballage est terminé, est caractérisé par le fait que laditefeuille présente une face autocollante recouverte partiellement par la couche à faible pouvoir de conduction thermique de manière que les surfaces non recouvertes forment lesdites surfaces autocollantes.This packaging, in which the closure means consist of self-adhesive surfaces, which has one of the faces of the flexible sheet, intended to be applied by pressure against the corresponding surfaces of the other side of this sheet, when the packaging is finished, is characterized by the fact that said sheet has an adhesive face partially covered by the layer with low thermal conduction power so that the uncoated surfaces form said adhesive surfaces.

Le dessin ci-annexé représente schématiquement et à titre d'exemple, u ne forme d'exécution de l'objet de l'invention.

  • La figure 1 en est une vue en perspective, prêt à l'emploi,
  • les figures 2 et 3 sont des vues en coupe par des plans perpendiculaires d'un emballage réalisé au moyen de cette forme d'exécution,
  • la figure 4 est un graphique représentant la température du produit emballé en fonction du temps,
  • la figure 5 est une vue illustrant la fabrication en série et le stockage du matériau.
The attached drawing shows schematically and by way of example, an embodiment of the subject of the invention.
  • FIG. 1 is a perspective view of it, ready to use,
  • FIGS. 2 and 3 are sectional views through perpendicular planes of a package produced by means of this embodiment,
  • FIG. 4 is a graph representing the temperature of the packaged product as a function of time,
  • Figure 5 is a view illustrating mass production and storage of the material.

Le matériau d'emballage isothermique représenté au dessin est constitué par une feuille rectangulaire souple 10, en polyvinyl, de 40 cm de largeur, de 90 cm de longueur et de 0,5 mm d'épaisseur, blanche et brillante sur sa face extérieure et autocollante sur sa face intérieure, et par une couche de mousse plastique 11, à cellules ouvertes, de 5 mm d'épaisseur, autocollée sur la face intérieure de la feuille.The isothermal packaging material shown in the drawing consists of a flexible rectangular sheet 10, made of polyvinyl, 40 cm wide, 90 cm long and 0.5 mm thick, white and shiny on its outer face and self-adhesive on its inner face, and with a layer of plastic foam 11, with open cells, 5 mm thick, self-adhesive on the inner face of the sheet.

Cette couche 11 est discontinue de manière à laisser apparaître la face autocollante de la feuille 10 le long d'une plage transversale 12 et le long de deux bandes longitudinales 13.This layer 11 is discontinuous so as to reveal the adhesive face of the sheet 10 along a transverse area 12 and along two longitudinal strips 13.

Les figures 2 et 3 montrent comment la feuille illustrée à la figure 1 a été utilisée pour emballer un pavé de crème glacée de 400 g. La feuille a été enroulée trois fois autour du pavé et l'emballage ainsi obtenu a été fermé en pressant la plage autocollante 12 et les bandes autocollantes 13 contre les surfaces correspondantes de la face brillante de la feuille 10.Figures 2 and 3 show how the sheet illustrated in Figure 1 was used to package a 400g ice cream block. The sheet was wrapped three times around the pad and the packaging thus obtained was closed by pressing the adhesive pad 12 and the adhesive strips 13 against the corresponding surfaces of the glossy face of the sheet 10.

Cet emballage, placé dans un milieu ambiant à une température de+22° C, permet de maintenir le pavé de crème glacée, initialement à une température de -20°C durant environ 2 heures avant qu'elle n'atteigne la température de -8°C à partir de laquelle la crème commence à fondre (figure 4). Cette performance est très largement supérieure à celles des cabas ou sacs en aluminium que l'on trouve dans les supermarchés, emballages qui ne permettent de conserver le même pavé dans les mêmes conditions que durant à peine une heure.This package, placed in an ambient environment at a temperature of + 22 ° C, keeps the ice cream block, initially at a temperature of -20 ° C for about 2 hours before it reaches the temperature of - 8 ° C from which the cream begins to melt (Figure 4). This performance is very much superior to that of the tote bags or aluminum bags found in supermarkets, packaging that only keeps the same pavement under the same conditions for barely an hour.

Des feuilles, telles que celle représentée à la figure 1, seront avantageusement fabriquées en série et en continu, stockées en rouleaux et débitées au fur et à mesure des besoins en coupant les feuilles l'une après l'autre.Sheets, such as that shown in FIG. 1, will advantageously be produced in series and continuously, stored in rolls and cut up as and when required by cutting the sheets one after the other.

La feuille d'emballage représentée au dessin est plus spécialement destinée aux produits préemballés. Dans une variante destinée aux produits non préemballés, notamment pour la viande, on pourra prévoir une couche intérieure supplémentaire, recouvrant partiellement la couche de mousse, par exemple une feuille d'aluminium, un film de PVC, un papier gras, pour protéger le produit et éviter qu'il pénètre dans la mousse. Cette couche supplémentaire pourra être collée à la couche de mousse uniquement le long d'un seul bord pour ne pas être froissée.The packaging sheet shown in the drawing is more specifically intended for prepackaged products. In a variant intended for non-prepackaged products, in particular for meat, an additional inner layer may be provided. keep quiet, partially covering the foam layer, for example aluminum foil, PVC film, greasy paper, to protect the product and prevent it from entering the foam. This additional layer can be glued to the foam layer only along one edge so as not to be wrinkled.

Dans une autre variante, la feuille souple pourra comporter une zone non encollée contiguë à la plage 12 facilitant la préhension du bord pour l'ouverture de l'emballage.In another variant, the flexible sheet may include a non-glued area contiguous to the area 12 facilitating the gripping of the edge for opening the packaging.

On notera que l'étanchéité et l'isolation thermique des bords de l'emballage sont renforcées par la zone continue de collage que constituent la plage 12 et les bandes 13 et par la pression que subit la mousse au niveau de cette zone.It will be noted that the sealing and thermal insulation of the edges of the packaging are reinforced by the continuous bonding zone formed by the pad 12 and the strips 13 and by the pressure which the foam undergoes at this zone.

On remarquera encore que lorsque les feuilles sont stockées en rouleaux, les surfaces autocollantes, plage 12 et bandes 13, ne sont en contact ni avec l'air, ni avec la mousse de telle sorte que ces surfaces sont toujours propres et utilisables.It will also be noted that when the sheets are stored in rolls, the self-adhesive surfaces, pad 12 and strips 13, are not in contact either with the air or with the foam so that these surfaces are always clean and usable.

Claims (4)

1. Material for realizing an isothermal airtight package, composed of a soft sheet (10) having a face with a high reflecting power and comprising a layer (11) of material with a lowthermal conduction power, where said sheet (10) is meant to be wrapped about the product to be packed so as to form a roll of one or several thicknesses, and of sealing means consisting of self-adhesive surfaces carried by one of the faces of said sheet and to be pressed against the corresponding surfaces of the other face of said sheet when wrapping is completed, characterized in that said sheet (10) has a self-adhesive face partly covered by said layer (11 ) so that the uncovered surfaces form said self-adhesive surfaces (12, 13).
2. Material according to claim 1, characterized in that said self-adhesive surfaces (12, 13) form a transversal margin (12) and longitudinal bands (13).
3. Material according to claim 2, characterized in that said sheet (12) has a protective layer on said layer (11 ).
4. Dispenser of package material according to claim 1, characterized in that it comprises a continuous band made up of a number of sheets (10) to be cut off when needed.
EP82902525A 1982-08-30 1982-08-30 Isothermal package material Expired EP0116535B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82902525T ATE19766T1 (en) 1982-08-30 1982-08-30 ISOTHERMAL PACKAGING MATERIAL.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH1982/000103 WO1984000943A1 (en) 1982-08-30 1982-08-30 Isothermal package material

Publications (2)

Publication Number Publication Date
EP0116535A1 EP0116535A1 (en) 1984-08-29
EP0116535B1 true EP0116535B1 (en) 1986-05-14

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ID=4539338

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82902525A Expired EP0116535B1 (en) 1982-08-30 1982-08-30 Isothermal package material

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US (1) US4881646A (en)
EP (1) EP0116535B1 (en)
AT (1) ATE19766T1 (en)
AU (1) AU8826182A (en)
DE (1) DE3271161D1 (en)
WO (1) WO1984000943A1 (en)

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Publication number Publication date
WO1984000943A1 (en) 1984-03-15
DE3271161D1 (en) 1986-06-19
AU8826182A (en) 1984-03-29
EP0116535A1 (en) 1984-08-29
ATE19766T1 (en) 1986-05-15
US4881646A (en) 1989-11-21

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