WO2011067305A1 - Contenant perméable au gaz à auto-absorption destiné à un emballage pour aliments et emballage pour aliments obtenu à partir de ce dernier - Google Patents

Contenant perméable au gaz à auto-absorption destiné à un emballage pour aliments et emballage pour aliments obtenu à partir de ce dernier Download PDF

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Publication number
WO2011067305A1
WO2011067305A1 PCT/EP2010/068676 EP2010068676W WO2011067305A1 WO 2011067305 A1 WO2011067305 A1 WO 2011067305A1 EP 2010068676 W EP2010068676 W EP 2010068676W WO 2011067305 A1 WO2011067305 A1 WO 2011067305A1
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WO
WIPO (PCT)
Prior art keywords
layer
receptacle
gas
liquid
barrier
Prior art date
Application number
PCT/EP2010/068676
Other languages
English (en)
Inventor
Eugenio Longo
Luca Cerani
Philippe Baldet
Original Assignee
Cryovac, Inc.
Vitembal Société Industrielle
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Cryovac, Inc., Vitembal Société Industrielle filed Critical Cryovac, Inc.
Publication of WO2011067305A1 publication Critical patent/WO2011067305A1/fr

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Classifications

    • 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
    • B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
    • B65D81/26—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators
    • B65D81/264—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for absorbing liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/32—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed at least two layers being foamed and next to each other

Definitions

  • the present invention relates to a receptacle for food packaging suitable for use in vacuum or modified atmosphere packaging of food products that tend to exude fluids.
  • the present invention is also directed to the use of said receptacles in food packaging processes and to the food packages obtained thereby.
  • the present invention also relates to some improvements in the manufacturing processes of said receptacles.
  • gas-barrier properties for a packaging material have become extremely important.
  • gas-barrier packaging material it is in fact possible to package the food product under vacuum or under a modified atmosphere especially designed to increase the shelf life of the packaged product. It is thus possible for instance to prepare suitable food packages, e.g. meat packages, at a central unit and then distributing them to supermarkets and small shops.
  • EP-A-520509 WO-A-00/46125 and EP-A-1211193
  • EP-A-1211193 relate to self absorbent packages in which gas- barrier systems are mentioned but none of these packages is provided with the required air-tightness.
  • EP-B-1404589 describes a self absorbent tray which may guarantee that the end package, obtained by sealing a gas-barrier lid film to the tray flange, will have gas-barrier properties.
  • This tray in the following indicated as SABT (Self Absorbent Barrier Tray), is made of a multi-layer laminated thermoplastic structure substantially comprising an upper liquid absorbent layer and a lower liquid and gas-barrier thermoplastic film, said barrier film being exposed along the flange surface thus providing an area suitable for an air-tight sealing.
  • the SABT structure may comprise an external support layer and an internal food contact layer, said food contact layer being permeable, preferably by perforation, to the fluids to be collected by the underneath liquid absorbent layer.
  • the wrong positioning of the barrier film within the structure might be critical, for example if the barrier film (B) is laminated onto a support layer (S) and this double layer is presented upside down at the subsequent coupling with the absorbent layer (A), the final tray will not have the right sequence of layers, namely going form the outer to the inner layer S/B/A, but B/S/A. Consequently the exposed flange will be made by the non- barrier support layer material (S) and will be hardly sealable, but even if it seals, the final package will not be air-tight.
  • the barrier film is, for example, positioned in place of the absorbent layer, the resulting sequence would be S/A/B and not S/B/A, providing a not absorbing gas barrier system or, in case the flange is cut for exposing the barrier the sequence would be S/A, giving a non barrier absorbing tray. If an additional food-contact layer exists, it might happen that during the perforation stage also the wrongly positioned barrier film is perforated, thus providing an absorbing but non barrier tray.
  • any misplacement of the transparent barrier film within the multilayer structure would be hardly recognizable by the operators by a simple visual inspection of the final laminate and /or the assembled SABT.
  • Another different issue might surface when the packager wants to smarten up the appearance of the final package by providing it with a particular design, i.e. a contrasting or coloured frame, all around the top surface.
  • This ornament could be carried out by printing along the perimeter either the lid or the flange of the SABT, but in both cases with significant problems.
  • printing the lidding web requires then a rigorous registration system for aligning the image onto the tray for the final package.
  • printing the flange of the tray, before or after assembling steps may involve registering troubles. Both these approaches might originate further problems, due to the presence of superficially applied inks and varnishes in the correspondence of the cutting and sealing areas, such as bad sealing and contamination of cutting blades and sealing bars.
  • An alternative solution might consist in putting the coloured pigments within the lower layers, namely the layers located externally with respect to the barrier film.
  • the barrier film is transparent, the portion of the flange exposed will have the colour of the underneath layers thus providing a frame-like ornament.
  • the final effect would not only be a coloured frame but an externally whole coloured tray, also coloured at the flange surface, with an unjustified use of additional amount of pigments.
  • foamed tray the resulting colour would be rather light and not brilliant.
  • the present invention is directed to a receptacle suitable for food packaging which comprises a bottom or base portion defining a storage compartment or zone and a flange circumferentially extending all around the receptacle contour providing an area for the closing lid to be sealed, said receptacle being made of a multi-layer thermoplastic structure comprising at least
  • an upper liquid absorbent layer that is devised to be either in direct contact with the food product to be packaged in the receptacle or separated from it by one or more liquid pervious layers allowing passage of liquids from the receptacle inner surface into the absorbent layer, and
  • the surface exposed along a closed line in said circumferential flange is of the lower non-perforated liquid and gas-barrier thermoplastic film, characterized in that said lower non-perforated liquid and gas-barrier thermoplastic film and said surface exposed along a closed line in the circumferential flange are visually distinguishable from the other components of said receptacle.
  • the present invention is related to a method of packaging a food product that tends to exude fluids, by loading it into the storage compartment of the receptacle of the invention, optionally vacuumizing and/or gas flushing the receptacle with a suitably selected gas or gas mixture that would extend the shelf life of the packaged product and closing said receptacle by means of a gas-barrier lid sealed to the exposed surface of the liquid- and gas-barrier film along a closed line in the circumferential flange of the receptacle characterized in that said exposed surface is visually distinguishable from the other components of the receptacle.
  • the present invention is directed to a gas-barrier package for food products that tends to exude fluids comprising a food product loaded onto or into a receptacle according to the present invention closed by a gas-barrier lid, disposed over the food product, and sealed to the exposed surface of the liquid- and gas-barrier film along a closed line in the circumferential flange of the receptacle characterized in that said surface exposed along a closed line in the circumferential flange is visually distinguishable from the other components of said receptacle.
  • the present invention relates to a method for manufacturing the receptacle of the invention which comprises the use of a visually distinguishable liquid- and gas-barrier film.
  • the present invention is directed to a laminate suitable for manufacturing the receptacles of the invention comprising at least a liquid absorbent layer and a liquid- and gas-barrier film, said film being visually distinguishable from the other layers of said laminate.
  • Figure 1 is a sectional view of a first preferred embodiment of the receptacle of the present invention.
  • Figure 2 is a sectional view of a second preferred embodiment of the receptacle of the present invention.
  • Figure 3 is a sectional view of a third preferred embodiment of the receptacle of the present invention.
  • Figure 4 is an enlarged sectional view of the flange portion of a receptacle of the first preferred embodiment illustrated in Figure 1 ;
  • Figure 5 is a sectional view of a package of the present invention obtained using the receptacle of Figure 1 ;
  • Figure 6 is a sectional view of a package of the present invention obtained using the receptacle of Figure 3;
  • Figure 7 is a cross-sectional view of one preferred multi-layer thermoplastic structure suitable for the manufacture of a receptacle according to the present invention.
  • Figure 8 is a cross-sectional view of another preferred multi-layer thermoplastic structure suitable for the manufacture of a receptacle according to the present invention.
  • Figure 9 is a cross-sectional view of still another preferred multi-layer thermoplastic structure suitable for the manufacture of a receptacle according to the present invention.
  • Figure 10 is a view from above of a preferred receptacle of the present invention.
  • the present invention is directed to a receptacle suitable for food packaging which comprises a bottom or base portion defining a storage compartment or zone and a flange circumferentially extending all around the receptacle contour providing an area for the closing lid to be sealed, said receptacle being made of a multi-layer thermoplastic structure comprising at least
  • an upper liquid absorbent layer that is devised to be either in direct contact with the food product to be packaged in the receptacle or separated from it by one or more liquid pervious layers allowing passage of liquids from the receptacle inner surface into the absorbent layer, and
  • the surface exposed along a closed line in said circumferential flange is of the lower non-perforated liquid and gas-barrier thermoplastic film, characterized in that lower non-perforated liquid and gas-barrier thermoplastic film and said surface exposed along a closed line in the circumferential flange are visually distinguishable from the other components of said receptacle.
  • upper and lower refer to the relative positioning of the layers concerned in the overall multi-layer structure, wherein “upper” means closer to the product to be packaged and “lower” means further from the food product to be packaged.
  • the term "visually distinguishable” as used herein refers to any visual feature that render the subject referred to (the barrier film, the exposed surface of the flange of the assembled receptacle, etc..) easily distinguishable from adjacent elements within the laminate and/or within the assembled receptacle. Said distinction is appreciable by simple visual inspection, i.e. with the naked eye.
  • the technical feature that renders the subject referred to visually distinguishable within the laminate and/or within the assembled receptacle is preferably a different colour, preferably a contrasting colour, more preferably a highly contrasting colour, with respect to the colour of the other parts of said receptacle, preferably with respect to the colour of adjacent elements in the laminate or to the predominant colour of other components of the final receptacle, more preferably with respect to the colour of the upper layer(s).
  • Said feature is easily traceable by visual inspection as a coloured layer within the laminate structure and as a coloured frame in the final receptacle.
  • the term visually distinguishable has to be interpreted broadly, namely a visual distinguishable effect may be any visually detectable feature of the present barrier film other than colour, such as for example brightness, shining effect, optical reflection etc.. provided that the barrier film is visually distinguishable from the surroundings layers or components.
  • Said visually detectable feature may be imparted to the barrier film through the addition of suitable additives, for example shining flakes etc. or by manufacturing the film according to specific technologies, such as for example multilayering processes.
  • the receptacle has the shape of a tray, comprising a bottom portion and side walls integral with said bottom and with each other defining a storage compartment, and a flange that extends outwardly from the top edges of the side walls, typically in a plane substantially parallel to that of the bottom portion and the exposed surface of that flange is visually distinguishable from the other components of said tray.
  • Said embodiment is illustrated in Figures 1 and 2.
  • the receptacle has the shape of a tray, comprising a bottom portion and side walls integral with said bottom and with each other defining a storage compartment, the inner surface of said storage compartment being superficially perforated both at the bottom and at the side walls, and a flange that extends outwardly from the top edges of the side walls, typically in a plane substantially parallel to that of the bottom portion and the exposed surface of that flange is visually distinguishable from the other components of said tray.
  • superficially perforated means that said perforations do not damage the barrier layer, otherwise the barrier effect would be compromised, and indicates that said perforations can go through the absorbing layer, at least partially, or may be limited to the food-contact layer, if present.
  • the superficially perforated tray of the above embodiment is particularly advantageous as it allows fluids to be absorbed also when the final package is positioned vertically.
  • the receptacle is an almost flat support, i.e. a dish-shape receptacle, which may have e.g. a rectangular, round, oval or squared shape, the flange is the outward edge of said flat support and the exposed surface of that flange is visually distinguishable from the other components of said receptacle.
  • a dish-shape receptacle which may have e.g. a rectangular, round, oval or squared shape
  • the flange is the outward edge of said flat support and the exposed surface of that flange is visually distinguishable from the other components of said receptacle.
  • the surface exposed along a closed line in the circumferential flange i.e. in the closed line provided for sealing the lid to the receptacle, is the surface of the visually distinguishable non- perforated liquid- and gas-barrier film and said surface is visually distinguishable from the other components of the receptacle.
  • the exposure of the visually distinguishable liquid- and gas-barrier film along the sealing line in the receptacle according to the present invention is preferably achieved starting from a dish- or tray-shaped laminate, including both the absorbent layer and the visually distinguishable liquid- and gas-barrier film and removing the uppermost layers, including the absorbent layer and any liquid pervious layer on top thereof, along said sealing line.
  • a further object of the present invention is a laminate suitable for manufacturing the receptacles of the present invention comprising at least a liquid absorbent layer and a liquid- and gas-barrier film, said film being visually distinguishable from the other layers of said laminate.
  • end receptacles starting from a continuous sheet or from discrete pieces of a flat laminate of the overall multi-layer structure wherein however the size and the position of the laminate of the upper layers, i.e. those on top of the visually distinguishable liquid- and gas-barrier thermoplastic film, are suitably set to provide directly for the desired product upon in registry thermoforming.
  • the use of a visually distinguishable barrier film allows to easily detect its accidental omission or its erroneous replacement with another transparent non barrier film or its wrong positioning within the multilayer structure on the lamination and thermoforming lines with unquestionable advantages for the overall process efficiency.
  • thermoplastic multi-layer sheet of the base portion of the receptacle of the invention comprises in addition to a liquid absorbing layer and a visually distinguishable liquid- and gas-barrier thermoplastic film, also a structural support layer that is preferably " lower” with respect to the visually distinguishable liquid- and gas-barrier thermoplastic film, and a liquid- pervious, food-contact layer.
  • the liquid absorbing layer may comprise any type of liquid absorbing material.
  • the liquid absorbing layer is made of an open cell foam material.
  • a thermoplastic foamed sheet, in which the cells are at least for their majority open, i.e. intercommunicating, may in fact absorb and store liquids, similarly to a sponge. Any type of polymer than can be foamed giving an open cell structure can suitably be employed for this absorbent layer.
  • suitable polymers include polyethylenes, either homo-polymers or copolymers, such as ethylene- a -olefin copolymers and ethylene-vinyl acetate copolymers, chlorinated polyethylenes, polypropylene-based resins, polystyrene and polystyrene copolymers, polyesters, such as polyethylene terephthalate, and the like polymers.
  • the thickness of the open-cell foam absorbing layer is typically comprised between about 0.1 mm and about 10 mm, preferably between about 1 mm and about 4 mm. To increase liquid absorption by the open cell foam material it may be advisable to treat the internal cell surface or at least the exposed surface thereof with a surfactant such as a salt of a sulphonic acid or a sulphuric ester.
  • thermoplastic sheets with an absorbency of from 500 to 1 ,500 ml/m2.
  • the open cell foam material may be used as the food-contact layer.
  • said open cell foam absorbent layer is an internal layer, and the multi-layer structure also comprises an upper, food-contact layer.
  • the purpose of said food-contact layer is mainly that of hiding from view the liquid absorbed in the subsisting absorbing layer, such as the reddish meat drip or the yellowish poultry drip, and for this reason said separate food-contact layer is preferably opaque.
  • thermoplastic multi-layer sheet in case it is thermoformed into a tray.
  • perforations are required.
  • the perforations have a small diameter, typically lower than 1.5 mm, preferably lower than 1.2 mm, and more preferably lower than 1 mm, and are regularly distributed on the surface of the sheet.
  • the number of perforations per m2 will depend on the average diameter of the perforations and may suitably be comprised between 500 and 40,000, preferably between 1 ,000 and 10,000.
  • the perforations are typically arranged in parallel rows that may be off set one respect to the other.
  • the perforations are normally funnel-shaped towards the inside of the sheet and may have a round or slightly oval section, particularly in the regions where the sheet is stretched to form it into a tray.
  • the perforations extend also in said absorbent layer. Said perforations are advantageously also present along the side walls, thus providing the fluids absorbing effect even in case the final package is positioned vertically, for example in a supermarket shelf.
  • the food contact layer can be of any thermoplastic material and the preferred ones are those providing for a good bond with the underlying open cell foam layer. Generally the same resin used for the open cell foam layer can be employed as a thick non-foamed layer for the food-contact layer. It would be further advantageous if also this layer would be sealable to the lid to avoid that the absorbed drip percolates along the edges of the absorbing layer if the receptacle is positioned vertically.
  • the thickness of said food-contact layer is typically comprised between about 3 mm and about 100 mm, preferably between about 5 mm and about 80 mm, more preferably between about 8 mm and about 50 mm.
  • the food-contact layer is not perforated but is of a porous, liquid pervious, material.
  • porous materials that may be pervious to liquids are some non-woven films or some void-containing films where the pattern of voids in the polymer matrix allows the passage of liquids by capillarity.
  • these liquid pervious films are made of polyolefin resins.
  • commercially available non-woven polyethylene films or void-containing polypropylene films can suitably be employed for the food contact layer.
  • the absorbing layer will comprise super absorbent polymer (SAP) particles, wherein the term "SAP” refers to any water- swellable homo- or co-polymer known in the art that may absorb and hold many times its weight of aqueous fluids.
  • SAP super absorbent polymer
  • these water-swellable polymers possess a structure in which a water-soluble polymer has been made insoluble by some process, typically by means of well-known multifunctional cross-linking agents employed during or after polymerization, or by radiation cross-linking or by thermal treatments.
  • water- swellable polymers that may suitably be employed in the absorbent layer of the present laminate include : poly(acrylic acid) salts, poly(acrylate) salts, polyvinyl alcohol-acrylic acid) salts, poly(isobutylene-maleic acid) salts, poly(ether)-based non ionic polymers, sodium carboxymethylcellulose, poly(vinylpyrrolidone), acrylonitrile-g rafted starch, acrylic acid grafted-starch, and the like polymers.
  • SAP particularly suitable for food packaging applications is that of cross-linked poly(vinylpyrrolidones), such as those commercially available from BASF (Kollidon®).
  • SAPs are generally provided in the form of particulate materials, typically in the form of finely divided powders.
  • they are preferably embedded in a polymeric matrix or bonded with a polymeric binder to allow either the extrusion thereof in a film layer, or its distribution on a thermoplastic substrate by a continuous or discontinuous coating process or by spraying.
  • the overall amount of SAP that will be contained in absorbent layer will depend on the type of food product packaged and on the absorbency of the particular SAP employed. Typically for food packaging the maximum absorbency required is about 1 ,500 ml/m2.
  • a SAP is employed for the liquid absorbing layer
  • said layer is an internal layer and a separate food-contact layer is necessarily present to avoid any active drawing out of the fluid from the food product that might occur if the food product is directly in contact with the absorbent.
  • a separate food-contact layer is necessarily present to avoid any active drawing out of the fluid from the food product that might occur if the food product is directly in contact with the absorbent.
  • a SAP for the liquid absorbing layer
  • a "distribution" layer positioned between the fluid absorbing layer and the food-contact layer.
  • Such a distribution layer might be useful to increase the efficiency of the absorbent layer by better distributing the fluids therein.
  • Said optional distribution layer may have an absorbing capacity, but this is not a necessary feature. It may distribute the fluids that drip from the food- contact layer by a chemical or a physical mechanism.
  • said layer will comprise a polar hydrophilic polymer such as a poly(acrylic acid), a poly (aery late), or another similar polymer, that preferably contains also surface active agents.
  • the distribution of the fluids will be obtained using a fibrous or slightly foamed open cell layer of a low melting polymer or a layer where the fibrous material is embedded into a polymer matrix that may optionally be slightly foamed.
  • any other alternative liquid absorbing material can be used for the liquid absorbing layer in the receptacle according to the present invention, the above listed materials representing only preferred embodiments thereof.
  • the multi-layer thermoplastic structure of the receptacle of the present invention comprises a visually distinguishable thermoplastic liquid and gas-barrier film.
  • said visually distinguishable thermoplastic film will be farther from the food product than the liquid absorbing layer. While in a preferred embodiment said visually distinguishable liquid- and gas-barrier film is adjacent to the liquid absorbing layer, in some instances one or more additional layers can be imposed between the liquid absorbing layer and the visually distinguishable thermoplastic liquid- and gas-barrier film.
  • the visually distinguishable liquid- and gas-barrier film may be a monolayer film of a gas-barrier resin but preferably it is a multi-layer film wherein at least one layer has gas-barrier properties.
  • Non-limitative examples of gas-barrier polymers that can suitably be employed for the gas-barrier layer are EVOH, PVDC, and polyamides.
  • EVOH includes saponified or hydrolyzed ethylene-vinyl acetate copolymers, and refers to vinyl alcohol copolymers having an ethylene comonomer content preferably comprised from about 28 to about 48 mole %, more preferably, from about 32 to about 44 mole % ethylene, and even more preferably, from about 36 to about 42 mole % ethylene, and a saponification degree of at least 85 %, preferably at least 90 %.
  • PVDC refers to a vinylidene chloride copolymer wherein a major amount of the copolymer comprises vinylidene chloride and a minor amount of the copolymer comprises one or more unsaturated monomers copolymerisable therewith, typically vinyl chloride, and alkyl acrylates or methacrylates (e.g. methyl acrylate or methacrylate) or to a blend thereof in different proportions.
  • said PVDC contains plasticisers and/or stabilizers as known in the art.
  • polyamide is intended to refer to both polyamides and co-or ter- polyamides. This term specifically includes aliphatic polyamides or co- polyamides, aromatic polyamides or co-polyamides, and partially aromatic polyamides or co-polyamides, modifications thereof and blends thereof.
  • gas-barrier material also blends of EVOH with polyamides can suitably be employed.
  • the gas-barrier material may also consist of a silica-coated film or anyway of a film of thermoplastic material with deposited a thin layer of inorganic metal oxides (typically silica or alumina) known to provide transparent barrier films suitable for critical packaging applications.
  • a silica-coated film or anyway of a film of thermoplastic material with deposited a thin layer of inorganic metal oxides (typically silica or alumina) known to provide transparent barrier films suitable for critical packaging applications.
  • the barrier layer will comprise a thermoplastic polymer selected from the group consisting of PVDC, EVOH, and polyamides. Even more preferably the barrier layer will comprise PVDC or EVOH.
  • the visually distinguishable liquid and gas barrier film comprises suitable food-law approved additives, preferably coloured pigments well known in the art, in order to confer the desired distinguishing aspect such as particular colour, brightness, shining effect etc... preferably a different colour, preferably a contrasting colour, more preferably a highly contrasting colour with respect to the colour of the other layers of the laminate or the other parts of the receptacle of the present invention.
  • Said additives or pigments are generally previously dispersed within a polymer matrix, for example within a polyolefin resin, thus forming a colouring master batch, which is then added to one or more of the thermoplastic resins of the layers of the barrier film in the desired amount.
  • said additive or pigment master batch can be dispersed within all the layers of the multilayer barrier film structure, in one or more layers, but preferably, not within the barrier resin to prevent any impairment of the barrier properties of the resulting barrier layer; said master batch is preferably added to the bulk layer resin or to the tie layer resin or to sealing layer resin, more preferably if present, to the tie layer resins, even more preferably to more than one tie layer in order to confer a stronger visual effect.
  • the visually distinguishable lower non-perforated liquid and gas-barrier thermoplastic film is a multilayer film comprising additives or pigments conferring a visually distinguishable effect in at least one layer, wherein said layer is not the barrier layer.
  • the choice of the kind of additive or pigment and its concentration will depend on the final visual effect desired, taking into consideration the colour of the other components of the laminate or the assembled receptacle and the necessity to confer a visually distinguishable effect on the barrier film.
  • the other components of the laminate and of the final assembled receptacle can comprise additive and/or coloured pigments conferring them any particular visual effect such as colour, brightness, shining effect, optical reflection etc, however being essential that the barrier film is visually distinguishable from the surroundings layers or components.
  • the barrier film is visually distinguishable within the laminate multilayer structure and within the assembled receptacle. It is thus possible, for example, to have the upper layers, namely the layers between the barrier film and the food, of one colour, the lower layers of another colour and the barrier film of a third colour, thus providing a 3 coloured version of the receptacle of the present invention provided that said barrier film is visually distinguishable from the upper and the lower layers.
  • a 2 coloured version may be manufactured for example by conferring the same visual effect to the upper and to the lower layers, while the barrier film will be distinguished by a different colour or visual effect.
  • the thickness of the visually distinguishable gas-barrier layer will be set in order to provide the overall multi-layer sheet with an Oxygen Transmission Rate (OTR) (evaluated by following the method described in ASTM D- 3985 and using an OX-TRAN instrument by Mocon) lower than 10, preferably lower than 5 cm3/m2.d.atm, when measured at 23 °C and 0 % of relative humidity.
  • OTR Oxygen Transmission Rate
  • barrier layers 3-4 mm thick typically when PVDC or EVOH are employed as the gas-barrier materials, this is achieved with barrier layers 3-4 mm thick. Thicker layers can be used if desired or if a lower OTR is needed, while thinner layers can be used e.g. if a polymer with higher barrier properties is employed.
  • the liquid- and gas-barrier film is a multi-layer film comprising in addition to a visually distinguishable gas-barrier layer at least a heat- sealable layer, because the surface of the visually distinguishable gas- barrier film that will be exposed in the flange of the receptacle of the invention should preferably be heat-sealable in order to give a hermetic seal with the closing lid by a conventional heat-sealing step.
  • Said heat- sealable layer can comprise any thermoplastic material that can be heat- sealed to the sealing layer of the barrier lid that will close the package. The preferred material will therefore depend on the material used for the heat- sealing layer of the closing lid.
  • said heat-sealable thermoplastic material will be selected among the polyolefins, such as polyethylene homo- or co-polymers, propylene copolymers, etc., the styrene homo- or copolymers, such as for instance polystyrene, styrene-butadiene-styrene block terpolymer (SBS), styrene-ethylene/butene-styrene block terpolymer (SEBS), and styrene-isoprene-styrene block terpolymer (SIS), and the hydrogenated derivatives thereof, and the polyester homo- and copolymers, such as poly-ethylene terephthalate homopolymer (PET), polyethylene terephthalate copolymers e.g. PETG, a glycol-modified polyethylene terephthalate, polyethylene naphthalate homopolymer (PEN), and polyethylene naphthalate copolymers.
  • ethylene and propylene co-polymers refer to the co- or ter- polymers containing a major amount of respectively ethylene or propylene and a minor amount of one or more other olefins and/or a non-olefinic comonomer copolymerizable therewith.
  • Typical examples of materials suitable for said heat-sealable layer are polyolefins, preferably ethylene homo-polymers, homogeneous and heterogeneous ethylene-a-olefin copolymers, ethylene-vinyl acetate copolymers, ionomers, etc., as well as blends of these polymers in any proportions, and styrene polymers, preferably SBS optionally blended with polystyrene.
  • Suitable blends may also include peelable blends to provide the receptacle with an easy-to-open feature.
  • the thickness of said heat-sealable layer will be typically comprised between about 2 mm and about 100 mm, preferably between about 6 mm and about 80 mm, more preferably between about 10 mm and about 50 mm.
  • Additional layers such as tie layers, to better adhere the gas-barrier layer to the adjacent layers, may be present in the visually distinguishable thermoplastic liquid- and gas-barrier film and are preferably present depending in particular on the specific resins used for the gas-barrier layer and on the possible presence of a separate structural layer.
  • the additives or colour pigments conferring the visually distinguishable effect to the barrier film are incorporated as a master batch within at least one tie layer of said multilayer barrier film, preferably in more than one tie layer.
  • Suitable adhesive layers will comprise thermoplastic polymers such as ethylene-vinyl acetate copolymers with high vinyl acetate content (e.g. 18- 28 wt. % or even more), ethylene-(meth)acrylic acid copolymers, ethylene homopolymers or co-polymers modified with anhydride or carboxylic acid functionalities, styrene-butadiene copolymers optionally modified with anhydride or carboxylic functionalities, and the like known resins.
  • thermoplastic polymers such as ethylene-vinyl acetate copolymers with high vinyl acetate content (e.g. 18- 28 wt. % or even more), ethylene-(meth)acrylic acid copolymers, ethylene homopolymers or co-polymers modified with anhydride or carboxylic acid functionalities, styrene-butadiene copolymers optionally modified with anhydride or carboxylic functionalities, and the like known resins.
  • thermoplastic multi-layer structure of the invention needs to have a rigidity sufficient to provide structural integrity and support for the food product without undue distortion of the receptacle and this can be obtained either using a visually distinguishable thermoplastic liquid- and gas-barrier film of a sufficient thickness, e.g. higher than about 100 mm, generally obtained by including in the thermoplastic film one or two bulk layers or, in a preferred embodiment, providing for a separate structural layer.
  • the separate structural layer can be made of a single layer or be a multi-layer structure. It can be manufactured from any suitable thermoplastic material, such as for instance polystyrene polymers, polypropylene polymers, polyesters, e.g. polyethylene terephthalate, polyethylenes, PVC, and the like polymers, and be either foamed or solid. In case of a multi-layer structure, part of it can be foamed and part can be cast.
  • Said structural support layer would preferably be farther to the food product to be packaged in the end receptacle according to the present invention than the visually distinguishable liquid- and gas-barrier thermoplastic film and in a most preferred embodiment one surface thereof will be the outer abuse-resistance surface of the end receptacle.
  • the flange of the container When the structural support layer is " lower " than the visually distinguishable thermoplastic liquid- and gas-barrier film, the flange of the container, particularly of the tray-shaped container, will have the necessary rigidity for the tray to be used in any type of packaging machine including those where the tray is held on the carrier plate of a lidding machine and the bottom of the tray is unsupported.
  • the structural support layer is a monolayer made of a foamed polymer.
  • the structural support layer is of foamed polystyrene.
  • the structural support layer is a monolayer of a solid, cast polymer.
  • the structural support layer is of cast polypropylene, polyester, high density polyethylene, polystyrene, high impact polystyrene, or PVC.
  • the thickness of the separate structural support layer is typically comprised between about 0.1 and 7 mm, depending mainly on whether it is a foamed or a cast material.
  • Structural support layers made of a cast solid material are preferably from 0.1 to 3 mm thick while structural support layers of a foamed material are preferably from 1 to 7 mm thick.
  • the visually distinguishable liquid- and gas-barrier film is adjacent to the liquid absorbing layer.
  • one or more additional layers can be imposed between the liquid absorbing layer and the visually distinguishable thermoplastic liquid- and gas-barrier film.
  • said additional, intermediate, layer or layers can comprise any type of material, such as for instance closed-cell foam material, or scrap, preferably but not necessarily from the same tray manufacturing process.
  • Said additional layer may thus provide the desired stiffness to the end sheet without recurring to a separate structural support layer "lower" than the visually distinguishable thermoplastic liquid- and gas-barrier film or to a thick visually distinguishable thermoplastic liquid- and gas-barrier film.
  • the multi-layer sheet used to form the receptacle will comprise (from the outermost abuse resistant layer to the innermost food-contact layer) a structural support layer, typically of foam material, such as foam polystyrene, foam polyester or foam polypropylene, or a cast mono-layer sheet of e.g. polypropylene, poly-vinyl chloride, or polyester; the visually distinguishable liquid- and gas-barrier thermoplastic film comprising a gas-barrier layer and a heat- sealable layer; a liquid absorbing layer; possibly a distribution layer and a liquid pervious food contact layer.
  • the overall thickness of this multi-layer sheet will typically be up to 1.2 cm and preferably up to 1.0 cm, as known and conventional in this area. Preferably it will be comprised between 0.1 and 0.8 cm and more preferably between 0.2 and 0.7 cm.
  • the visually distinguishable liquid- and gas-barrier thermoplastic film of the present laminates and assembled receptacles may be prepared according to any method well known in the art of thermoplastic films manufacturing, such as by coextrusion and/or lamination and/or coating of the various layers, for example by coextrusion through a round or flat extrusion die of the selected resins, suitably added with the desired master batch comprising the additives or the coloured pigments, preferably not added at the barrier layer, more preferably added at the tie layers, thus providing the visually distinguishable liquid- and gas-barrier thermoplastic film, preferably a coloured liquid- and gas-barrier thermoplastic film.
  • a uniform laminate comprising both the absorbing layer and the visually distinguishable liquid- and gas-barrier thermoplastic film is obtained, shaped as desired and carved at the flange to expose the heat-sealable layer of the visually distinguishable liquid- and gas-barrier thermoplastic film, thus exposing the visually detectable feature, preferably the contrasting colour.
  • the various layers i.e. the separate structural support layer, if present, the visually distinguishable liquid- and gas-barrier thermoplastic film comprising the gas-barrier layer, the liquid absorbing layer and the food-contact layer, if present, may be formed separately using standard equipment and techniques and then laminated together by e.g. heat- lamination, glue-lamination, or extrusion lamination.
  • the absorbing layer is obtained by means of a SAP containing latex dispersion
  • said dispersion can be distributed on a surface of either one of the adjacent layers and the obtained partial structure containing at least two layers is then laminated to the rest of the structure by the same general methods.
  • part of the overall structure may be obtained by co-extrusion and then laminated to the remaining parts.
  • the adhesion of said layer to the adjacent ones may be obtained using a polyolefin modified with anhydride or carboxylic functionalities or with any water- or solvent-based glue approved for food packaging applications.
  • the heat-lamination steps 2 and 3 above can be carried out simultaneously and/or the lamination of the food-contact layer to the absorbing layer can be carried out before laminating said layer to the visually distinguishable liquid- and gas-barrier thermoplastic film.
  • a distribution layer may include, as the last but one step, the optional step of laminating said layer to either the absorbing layer or the food-contact layer or of coating it onto one of said layers.
  • said optional distribution layer is made of a thermoplastic polymer it can also be co-extruded together with the food-contact layer and/or the liquid absorbing layer.
  • the food-contact layer can be applied as a solid instead of a pre-perforated film and any perforation, if needed, can then be carried out on the end laminate, paying particular attention however not to perforate the gas-barrier layer in the visually distinguishable liquid- and gas-barrier thermoplastic film.
  • a receptacle may be shaped by any known technique.
  • the self-absorbing receptacle may be shaped into a tray or in the form of a flat support (a dish-like shape) that may have e.g. a rectangular, round, oval or squared shape by thermoforming, vacuum forming, stamping or any other technique available.
  • thermoforming where the multi-layer sheet is first molded and then, generally in a separate station, the molded parts are trimmed out while the remaining sheet "skeleton" is ground up for reuse.
  • the tray 110 (or 120) has a bottom or base portion 1 11 (or 121) that may be flat or concave or convex or of any other shape, side walls 112 (or 122) and an outwardly directed flange 113 (or 123), which extends around the rim or periphery of the tray.
  • the multi-layer structure illustrated in these Figures comprises a liquid absorbent layer 1 , a distribution layer 6, a food-contact layer 5 (both these latter layers are illustrated in the Figures as being perforated by perforations 115 (or 125); said layers however could alternatively be imperforated but liquid pervious), a visually distinguishable liquid- and gas-barrier thermoplastic film 2 comprising a gas-barrier layer 3 and a heat-sealable layer 8 made visually distinguishable by the incorporation of the suitable master batch, and a separate support layer 4.
  • the flange of the container is carved by removing the absorbent layer 1 as well as the food-contact layer 5 and the distribution layer 6, on top of the absorbent one, and possibly part of the visually distinguishable thermoplastic film 2 to expose a surface 114 (or 124) along a closed line in the circumferential flange, thus exposing the heat-sealable layer 8 of the visually distinguishable liquid- and gas-barrier film 2.
  • the upper layers namely the absorbent layer 1 , the food-contact layer 5 and the distribution layer 6, are removed along the outward circumferential part of the flange for a width sufficient to guarantee a hermetic sealing of the thermoplastic lid thereto.
  • said carving is carried out in an internal part of the flange thus creating a track of a width sufficient for sealing the lid thereto.
  • Removal can be obtained by cutting through the absorbing layer 1 , any upper layer 5 and 6, and any layer in-between the absorbing layer 1 and the heat-sealable layer 8, to reach the heat-sealable layer 8 and then tearing horizontally to remove the uppermost layers in the outward circumferential part of the flange.
  • the cut can be made in a direction substantially perpendicular to the flange or at an oblique angle relative to the plane of the flange, wherein angles of between 30° and 90 ° would be suitable.
  • This step can be carried out either on the finished trimmed out containers or, preferably, after the thermoforming step but before trimming out the molded parts, so that a skeleton of the upper layers, including the liquid absorption layer 1 , and the food contact layer 5 and distribution layer 6, if present, is removed altogether.
  • the molded parts are then suitably trimmed out to get the final receptacles with the outward circumferential part of the flange made up of the lower layers only.
  • the cuts can be made by any conventional means, including blades, hot knives/wires, laser etc.
  • Figure 7 illustrates a laminate where the bond between the heat-sealing layer 8 and the adjacent liquid absorbing layer 1 is sufficiently low to allow peeling off of the cut portion.
  • the structural layer 4 is a foamed polystyrene layer, either open-cell or, preferably, closed-cell;
  • the visually distinguishable liquid- and gas-barrier thermoplastic film 2 comprises a core gas-barrier layer 3 comprising an ethylene-vinyl alcohol copolymer, two tie layers 10 comprising the colouring master batch and a carboxy or anhydride modified polyolefin, and a heat-sealing layer 8 comprising a polyethylene or an ethylene-a- olefin copolymer;
  • the liquid absorbing layer 1 is of open-cell foam polystyrene; and the perforated food contact layer 5 is of non foamed polystyrene.
  • the bond at the interface between the liquid absorbing layer 1 and the heat-sealing layer 8 is very low and once the cut in the thickness of the upper layers reaches said heat-sealing layer 8, the horizontal tearing will expose the heat-sealing layer 8.
  • the arrow indicates the rupture line.
  • Figure 8 illustrates the case where the heat-sealing layer 8, that in the embodiment illustrated in said Figure is not the outer layer of the visually distinguishable liquid- and gas-barrier thermoplastic film 2, breaks by cohesive failure and allows removal of the upper layers in the receptacle flange.
  • the structural layer 4 is a foamed polystyrene layer, either open-cell or, preferably, closed-cell;
  • the visually distinguishable liquid- and gas-barrier thermoplastic film 2 comprises a core gas-barrier layer 3 comprising an ethylene-vinyl alcohol copolymer, two tie layers 10 comprising the master batch and a carboxy or anhydride modified polyolefin, a heat-sealing layer 8 comprising a blend of an ionomer having a melt flow index of about 1.25 g/10 min and a modified ethylene/vinyl acetate copolymer having a melt flow index of about 25 g/10 min, and a layer 9 comprising a resin such as styrene-butadiene-styrene copolymer, polystyrene, or ethylene-vinyl acetate copolymer;
  • the liquid absorbing layer 1 is of open-cell foamed polystyrene; and the perforated food contact layer 5
  • Figure 9 illustrates another embodiment of a laminate where the bond between the heat-sealing layer 8 and the adjacent intermediate layer 11 is sufficiently low to allow peeling off of the cut portion.
  • the structural layer 4 is a foamed polystyrene layer, either open-cell or, preferably, closed-cell;
  • the visually distinguishable liquid- and gas-barrier thermoplastic film 2 comprises a core gas-barrier layer 3 comprising an ethylene-vinyl alcohol copolymer, two tie layers 10 comprising the colouring master batch and a carboxy or anhydride modified polyolefin, and a heat-sealing layer 8 comprising a polyethylene or an ethylene-a-olefin copolymer;
  • the liquid absorbing layer 1 is of open- cell foam polystyrene;
  • the perforated food contact layer 5 is of non foamed polystyrene;
  • the intermediate layer 11 having a low bond with the heat- seal layer 8, is of styrene-butadiene-s
  • the receptacle according to the present invention can be manufactured by shaping as desired a first laminate comprising the liquid absorbing layer 1 and any upper layer but not the visually distinguishable liquid- and gas-barrier thermoplastic film and any lower layer, and then coupling said laminate with a laminate of a larger size, comprising said lower layers only.
  • a dish-shaped receptacle In case of a dish-shaped receptacle this can be easily achieved by cutting the two partial laminates in such a way that the laminate comprising the visually distinguishable liquid- and gas-barrier thermoplastic film has the same shape but is larger in size with respect to the laminate comprising the liquid absorbing layer and combining the two laminates by heat or glue lamination.
  • the receptacle is tray-shaped, this may be achieved by a vacuum skin lining process carried out with the visually distinguishable liquid- and gas-barrier thermoplastic film on the lower surface of the tray-shaped laminate comprising the liquid absorbing layer or by thermoforming the lower layers of a size slightly larger than the upper layers and with a larger flange and then combining the two tray- shaped parts into a single tray.
  • a further specific object of the invention is the use of a receptacle according to the present invention in the packaging of a food product in a modified atmosphere wherein the food product is loaded onto or into a self-absorbing gas-barrier receptacle according to the present invention, modified atmosphere is introduced into the package by gas flushing, with or without prior vacuumization, followed by the sealing of a gas-barrier film or lid along a sealing line in the flange of the receptacle where the exposed surface is that of the heat-sealing layer 8 of the visually distinguishable liquid- and gas-barrier thermoplastic film 2 to provide for a hermetically closed modified atmosphere package.
  • Said packages due to the visually distinguishable exposed surface of the barrier film, in a view from above, show a surrounding frame visibly distinguishable form the other components of the packages, preferably a frame in a contrasting colour.
  • Figure 5 refers to a package where the product 150 is placed into a tray-shaped receptacle 110 (as illustrated in Figure 1) and the package is then closed by sealing a gas-barrier lid 151 to the exposed surface of the heat-sealing layer 8 along a closed line 152 in the tray flange.
  • the lid can be a flexible, semi-rigid or rigid film or sheet. It can be stretchable or non stretchable, oriented or non-oriented and if oriented it can be heat-shrinkable or heat- set.
  • the gas-barrier lid 151 may be a monolayer or a multi-layer structure provided it is endowed with gas-barrier properties. Preferably however it will be a multilayer structure comprising at least a gas-barrier layer and a heat-sealable layer to create with the exposed surface of the heat-sealable layer 8 of the receptacle a hermetic seal.
  • a receptacle according to the present invention is used in the packaging of a food product in a modified atmosphere, preferably in a high oxygen content atmosphere, wherein the food product is loaded onto or into a self-absorbing gas-barrier receptacle according to the present invention, modified atmosphere is introduced into the package by gas flushing, with or without prior vacuumization, followed by the sealing of a twin lidding film comprising an inner, oxygen permeable, and an outer, gas impermeable, lidding film along a sealing line in the flange of the receptacle where the exposed surface is that of the heat-sealing layer of the visually distinguishable liquid- and gas-barrier thermoplastic film to provide for a hermetically closed modified atmosphere package.
  • a twin lidding film comprising an inner, oxygen permeable, and an outer, gas impermeable, lidding film along a sealing line in the flange of the receptacle where the exposed surface is that of the heat-sealing layer of the visually distinguishable liquid
  • Figure 6 shows a flat support 130, as illustrated in Figure 3, with a product 160 loaded thereon and a flexible, oriented or non oriented, heat- shrinkable or non heat-shrinkable, stretchable or non stretchable gas- barrier lid 161 sealed to the exposed surface of the heat-sealable layer 8 of the visually distinguishable liquid- and gas-barrier thermoplastic film 2 along the closed line 162 at the circumferential flange.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)

Abstract

La présente invention se rapporte à un contenant (110, 112) adapté pour emballer des aliments qui comprend une partie de fond ou de base (111, 121) définissant un compartiment ou une zone de stockage et un rebord (113, 123) s'étendant circonférentiellement tout autour du contenant pour former une surface destinée au couvercle de fermeture à sceller, ledit contenant étant constitué d'une structure thermoplastique multicouche comprenant au moins (i) une couche supérieure absorbant le liquide (1), qui est prévue pour soit être en contact direct avec le produit alimentaire qui doit être emballé dans le contenant, soit séparée de ce dernier par une ou plusieurs couches perméables au liquide (5, 6) qui laissent passer les liquides de la surface interne du contenant jusque dans la couche absorbante, et (ii) un film thermoplastique non perforé visuellement discernable qui est perméable au gaz et au liquide (2). Ledit contenant est caractérisé en ce que la surface exposée le long d'une ligne fermée du rebord circonférentiel (113, 123) est celle du film thermoplastique non perforé visuellement discernable qui est perméable au gaz et au liquide (2). Le fait de sceller un couvercle perméable au gaz et au liquide sur la surface exposée du film visuellement discernable qui est perméable au gaz et au liquide du contenant le long de ladite ligne fermée située sur le rebord circonférentiel permet d'obtenir ensuite un emballage perméable au gaz à auto-absorption.
PCT/EP2010/068676 2009-12-02 2010-12-01 Contenant perméable au gaz à auto-absorption destiné à un emballage pour aliments et emballage pour aliments obtenu à partir de ce dernier WO2011067305A1 (fr)

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FR2997068A1 (fr) * 2012-10-18 2014-04-25 Nicolas Saverino Barquette
WO2014142896A1 (fr) * 2013-03-14 2014-09-18 Bemis Company, Inc. Stratifié absorbant adhésif multicouche
EP2824041A1 (fr) * 2013-07-11 2015-01-14 Manfred Zimmer Emballage pour produits alimentaires tels que par exemple du poisson
EP2910490A1 (fr) * 2014-02-25 2015-08-26 Coopbox Group S.P.A. Plateau multicouche avec effet de drainage et procédé de fabrication associé
ITUB20159217A1 (it) * 2015-12-22 2017-06-22 Siropack Italia S R L Contenitore per prodotti alimentari
GB2560825A (en) * 2017-03-20 2018-09-26 Havi Global Solutions Europe Ltd Food packaging
CN109287730A (zh) * 2018-11-18 2019-02-01 林光琴 一种酱卤肉制品保鲜气调包装
WO2021203139A1 (fr) * 2020-04-02 2021-10-07 Maxwell Chase Technologies, Llc Emballage conçu pour contenir des produits et présentant un élément actif fixé à une surface intérieure de celui-ci, et son procédé de fabrication

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Publication number Priority date Publication date Assignee Title
FR2997068A1 (fr) * 2012-10-18 2014-04-25 Nicolas Saverino Barquette
WO2014142896A1 (fr) * 2013-03-14 2014-09-18 Bemis Company, Inc. Stratifié absorbant adhésif multicouche
US20160016718A1 (en) * 2013-03-14 2016-01-21 Bemis Company, Inc. Multilayer adhesive absorbent laminate
US10604324B2 (en) 2013-03-14 2020-03-31 Bemis Company, Inc. Multilayer adhesive absorbent laminate
EP2824041A1 (fr) * 2013-07-11 2015-01-14 Manfred Zimmer Emballage pour produits alimentaires tels que par exemple du poisson
EP2910490A1 (fr) * 2014-02-25 2015-08-26 Coopbox Group S.P.A. Plateau multicouche avec effet de drainage et procédé de fabrication associé
ITUB20159217A1 (it) * 2015-12-22 2017-06-22 Siropack Italia S R L Contenitore per prodotti alimentari
WO2017109749A1 (fr) * 2015-12-22 2017-06-29 Siropack Italia S.R.L. Contenant pour produits alimentaires
GB2560825A (en) * 2017-03-20 2018-09-26 Havi Global Solutions Europe Ltd Food packaging
CN109287730A (zh) * 2018-11-18 2019-02-01 林光琴 一种酱卤肉制品保鲜气调包装
CN109287730B (zh) * 2018-11-18 2022-07-26 广东益膳食品有限公司 一种酱卤肉制品保鲜气调包装
WO2021203139A1 (fr) * 2020-04-02 2021-10-07 Maxwell Chase Technologies, Llc Emballage conçu pour contenir des produits et présentant un élément actif fixé à une surface intérieure de celui-ci, et son procédé de fabrication

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