EP2910490A1 - Mehrschichtige Schale mit Drainagewirkung und zugehöriges Herstellungsverfahren - Google Patents

Mehrschichtige Schale mit Drainagewirkung und zugehöriges Herstellungsverfahren Download PDF

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Publication number
EP2910490A1
EP2910490A1 EP15000269.9A EP15000269A EP2910490A1 EP 2910490 A1 EP2910490 A1 EP 2910490A1 EP 15000269 A EP15000269 A EP 15000269A EP 2910490 A1 EP2910490 A1 EP 2910490A1
Authority
EP
European Patent Office
Prior art keywords
tray
layer
expanded
multilayer
thickness
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.)
Withdrawn
Application number
EP15000269.9A
Other languages
English (en)
French (fr)
Inventor
Veronica Cornini
Silvia Deangelis
Fabio Fiordelisi
Claudio Fornaciari
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
COOPBOX GROUP SpA
Original Assignee
COOPBOX GROUP SpA
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 COOPBOX GROUP SpA filed Critical COOPBOX GROUP SpA
Publication of EP2910490A1 publication Critical patent/EP2910490A1/de
Withdrawn legal-status Critical Current

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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
    • B65D81/261—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 draining or collecting liquids without absorbing them
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • 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

Definitions

  • the present invention refers in general to the field of food packaging.
  • the invention is concerned with a multilayer tray with draining effect and related production method of the same, as well as making packaging with a draining effect and gas barrier intended for the packaging of food products such as meat or fish that are prone to release fluids, and the packaging itself.
  • fluid or “fluids” is intended to refer to any (exuded) fluid or liquid released by a foodstuff also during their preservation, for example humidity, fat, blood or similar.
  • Packaging is known from the state of the art that is able to drain away and/or absorb the fluid released by the foodstuffs contained therein.
  • a concave upper support surface provided with a conduit for fluids and a lower planar surface together define a cavity in which the fluid released by the foodstuff is contained.
  • the document US 5,705,213 describes a packaging comprising a tray and a plastic closing film.
  • the tray includes a first portion impermeable to liquid which has a set of corrugations forming a network of approximately parallel ribs, and a second portion comprising apertures that fits in the first portion and on which the food product rests.
  • the ribs and the second portion define a set number of closed chambers in which the fluid released by the foodstuff is collected.
  • the absorbing pads described in these documents consist of several layers, usually of different materials, laminated together or joined by means of adhesives.
  • a first aim of the present invention is to provide a multilayer tray with draining effect that is easy to manufacture using traditional moulds for thermoforming and that at the same time allows traditional machinery to be used for the application of the standard closing film.
  • a second aim of the present invention is to provide a method for manufacturing packaging for food products that has good structural rigidity, such that it can withstand the packaging steps and adequately deal with transport and handling.
  • a third aim of the present invention is to provide packaging that at the same time ensures the correct draining of exuded fluids and provides good gas barrier capacity, reducing to a minimum the modifications of existing packaging plants, with resultant low manufacturing costs.
  • a further aim of the present invention is to provide packaging that is structurally simple and that is therefore an advantageous alternative to known packaging for food products that are prone to release fluids and that require conservation in a modified atmosphere, in particular a package that can be manufactured in a reduced time interval through the use of known machinery of the field.
  • Figure 1 shows a multilayer tray, generally indicated by reference number 1, having a base 2, lateral walls 3 and an upper rim 4.
  • the tray 1 is made with a multilayer material respectively consisting of, in succession from the outside inwards: one outermost layer of extruded expanded closed-cell polystyrene (XPS), one layer of a multilayer plastic barrier film with barrier-forming properties against the passage of gases, and one layer of expanded polyethylene (PE) that will be placed in contact with a food product placed in the tray.
  • the layer of expanded PE is perforated in order to retain the fluid released by the food product. Only along the rim 4 of the tray 1, the thickness of the layer of expanded PE, indicated with d in figure 1 , is less than at least half of the layer of expanded PE indicated with D in figure 1 , measured at the base 2 and/or at the lateral walls 3 of the tray 1.
  • HIPS high-impact polystyrene
  • This layer of HIPS considerably improves adhesion between the barrier film and the layer of XPS.
  • the tray 1 is made by means of thermoforming on the basis of a multilayer sheet, shown in figure 2 .
  • This multilayer sheet is made by means of calendering to join the various layers that form tray 1, as will be better described in the following.
  • the thicknesses of the various layers used for the multilayer sheet with which tray 1 is made are the following: Layer Thickness Closed-cell XPS 2 - 6 mm HIPS 20 - 120 micron Barrier film 20 - 60 micron Expanded PE 2 - 6 mm
  • the layer of extruded expanded closed-cell polystyrene (XPS) has a density comprised between 40 and 220 g/L. It is obtained by means of extrusion with direct injection of expansive gases of the known kind, such as aliphatic hydrocarbons and atmospheric gases, through an annular die.
  • the layer of HIPS is obtained by extrusion through a flat-headed die at a temperature between 180°C and 220°C.
  • the layer of barrier film has a sealing layer of PE on the side that comes in contact with the layer of expanded PE, to allow for the adhesion between these two layers.
  • the layer of expanded PE includes an antistatic additive to facilitate the absorption of liquids.
  • This antistatic additive is added already at the extrusion step of the sheet of expanded PE.
  • the barrier film is of the kind known in the field.
  • a multilayer plastic film in which at least one of the layers is composed of EVOH (ethylene vinyl alcohol) or PVDC (polyvinylidene chloride) or a polyamide or another type of polymer or polymer mix with low gas- and vapour-permeability, where the barrier layer has a thickness that is comprised between 2 and 12 micron for a multilayer film of an overall thickness comprised between 20 and 60 micron.
  • the layer of expanded PE has a density comprised between 15 and 50 g/L.
  • This layer of expanded PE preferably of the LDPE kind, is obtained by means of extrusion with direct injection of expansive gases of the known kind, such as aliphatic hydrocarbons and atmospheric gases, through an annular die. Moreover, during the extrusion of the expanded PE an antistatic additive of the known kind is added.
  • expansive gases of the known kind such as aliphatic hydrocarbons and atmospheric gases
  • the layer of expanded PE can be either closed-cell or open-cell, but will prevalently be closed-cell.
  • the perforation of the PE is made by holes that can either be through holes or blind holes - blind holes are preferred - whose diameter is preferably comprised between 0.3 and 1 mm.
  • the multilayer sheet is obtained by passing the various layers between the two heated rollers of a calender, kept at a set distance so that each layer will have the same base thickness.
  • the overall thickness of the multilayer sheet is equal to the sum of thicknesses of the various base layers that constitute the sheet.
  • the calender roller that comes into contact with the layer of expanded PE is kept at a temperature comprised between 80°C and 150°C, whereas the roller that comes into contact with the layer of XPS is kept at a temperature comprised between 60°C and 100°C.
  • the HIPS is added to the calender immediately after having been extruded by means of the method known as extrusion coating.
  • the barrier film is fed to the rollers between the layer of expanded PE and the layer of HIPS.
  • barrier film may also be coupled with the layer of expanded PE before being fed to the rollers.
  • the multilayer sheet thus obtained is rolled onto a spool for storage and subsequently thermoformed at the moment of manufacturing of the trays.
  • thermoforming step is of the kind known in the field, wherein the sheet is preheated in an oven at a temperature that is above the glass transition temperature TG of the polymers of which it is made. Subsequently it passes through the mould where the trays are made.
  • the mould is made in such a manner that during the thermoforming of the tray an upper rim (4) is created that is subjected to such pressure that the thickness of the layer of expanded PE is reduced to at least a quarter of the thickness of the layer of PE of the sheet.
  • the thickness of the layer of PE along the perimeter edge of the tray will be equal to approximately 1 mm, i.e. a reduction of 3 mm.
  • the mould exerts pressure onto the rim of the tray being moulded so that layer of expanded PE of the multilayer sheet is flattened along the rim itself.
  • the thickness of the expanded PE along the rim is not greater than 3 mm, and preferably not greater than 1.5 mm, after the thermoforming of the tray has ended.
  • the thickness of the expanded PE at the base 2 and at the lateral walls 3 is equal to at least 2 mm.
  • the thickness of the layer of expanded PE in the areas other than the upper rim is kept at a thickness that is adequate to ensure the absorption of fluids, in order to obtain the draining effect.
  • the mould is made in such a manner that it leaves a calibrated cavity during the thermoforming of the tray.
  • the layer of PE at the base and the lateral walls of the tray undergoes a reduction of its thickness with respect to the thickness of that same layer in the initial sheet, but this reduction in thickness is never greater than 50%.
  • thermoformed tray has a thickness along the rim that is half of the thickness of the layer of PE at the base and walls.
  • the upper rim of the tray is intended to mean that perimeter portion that will be covered by a plastic closing film.
  • the multilayer tray has a reduced thickness along the rim of the layer of expanded PE, the topmost one, that is not greater than half of the thickness of the layer of expanded PE in the other areas of the tray.
  • the tray Once the tray has been obtained by means of thermoforming in accordance with the present invention, it is ready to contain a food product that releases fluids, such as meat.
  • the food product will be in direct contact with the layer of perforated expanded PE, which will collect the fluid exuded during the preservation period.
  • the tray containing the product is sealed with a plastic closing film 5 to form a closed package, generally indicated by 10 in figure 3 .
  • the plastic closing film is applied to the tray along the upper rim through heat-sealing, by known technical methods of the field, with a heat-sealer.
  • the plastic closing film 5 consists of polyethylene PE or of multilayer barrier films of the kind usually employed in packaging in modified atmosphere (MAP) and with a sealing layer in PE.
  • MAP modified atmosphere
  • the plastic closing film 5 preferably has a thickness comprised between 8 and 150 micron.
  • the layer of expanded PE along the rim is compressed even more and heated up to the point where the expanded structure of the layer of expanded PE collapses and it fuses with the plastic closing film, thus creating a continuity of material between the layer of plastic closing film and the barrier film.
  • the layers underneath the barrier film - HIPS and XPS - in fact form a rigid external support to this closed bag.
  • the liquid retention capacity of the layer of perforated PE is equal to approximately 200-3000 g/m 2 of water.
  • the multilayer tray according to the present invention with draining effect for food products that exude liquids makes it possible to meet the requirements and overcome the drawbacks described in the introduction of this description with reference to the prior art.
  • the tray according to the present invention makes it possible to retain fluids exuded by food products without the need to employ a pad inside the tray and makes it possible to perform the function of barrier through the application of a closing layer made of PE of the known kind, with a resultant cost reduction in comparison with prior methods.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
  • Packages (AREA)
EP15000269.9A 2014-02-25 2015-01-29 Mehrschichtige Schale mit Drainagewirkung und zugehöriges Herstellungsverfahren Withdrawn EP2910490A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITBO20140088 2014-02-25

Publications (1)

Publication Number Publication Date
EP2910490A1 true EP2910490A1 (de) 2015-08-26

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ID=50349698

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15000269.9A Withdrawn EP2910490A1 (de) 2014-02-25 2015-01-29 Mehrschichtige Schale mit Drainagewirkung und zugehöriges Herstellungsverfahren

Country Status (1)

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EP (1) EP2910490A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3243648A1 (de) * 2016-05-09 2017-11-15 Coopbox Group S.P.A. Mehrschichtige schale mit drainagewirkung und zugehöriges herstellungsverfahren
USD964862S1 (en) 2018-08-21 2022-09-27 Intercontinental Great Brands Llc Tray

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993006026A2 (en) 1991-09-27 1993-04-01 Sealed Air Corporation Recyclable food product tray with increased liquid collection and retention capability
FR2702192A1 (fr) * 1993-03-02 1994-09-09 Fernandez Riesgo Nieves Barquettes pour contrôler des produits alimentaires d'ou s'écoulent des liquides.
DE19544858A1 (de) * 1995-10-02 1997-04-03 Silver Plastics Gmbh & Co Kg Verfahren zum Herstellen einer thermogeformten Verpackung
US5705213A (en) 1995-04-19 1998-01-06 Groupe Guillin (S.A.) Package for the packaging and the preservation of fresh food
FR2775667A1 (fr) * 1998-03-05 1999-09-10 Gerard Jean Marie Charpentier Conditionnement pour produit exsudant
EP1238795A1 (de) * 2001-03-05 2002-09-11 Cryovac, Inc. Selbstabsorbierende, gassperrende thermoformbare Folie und daraus hergestellte Behälter zum Verpacken von Lebensmitteln
EP1285861A2 (de) 2001-08-20 2003-02-26 Cryovac, Inc. Verpackung mit absorbierendem Polster
EP1445211A1 (de) 2003-02-10 2004-08-11 Cryovac, Inc. Saugfähiges Element und Verpackung dafür
EP1707499A1 (de) 2005-03-30 2006-10-04 Cryovac, Inc. Produktträger geeignet zum Absorbieren von Flüssigkeiten die von einem Produkt abgesondert werden
WO2011067305A1 (en) * 2009-12-02 2011-06-09 Cryovac, Inc. Self-absorbing gas-barrier receptacle for food packaging and food package obtained therefrom

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993006026A2 (en) 1991-09-27 1993-04-01 Sealed Air Corporation Recyclable food product tray with increased liquid collection and retention capability
FR2702192A1 (fr) * 1993-03-02 1994-09-09 Fernandez Riesgo Nieves Barquettes pour contrôler des produits alimentaires d'ou s'écoulent des liquides.
US5705213A (en) 1995-04-19 1998-01-06 Groupe Guillin (S.A.) Package for the packaging and the preservation of fresh food
DE19544858A1 (de) * 1995-10-02 1997-04-03 Silver Plastics Gmbh & Co Kg Verfahren zum Herstellen einer thermogeformten Verpackung
FR2775667A1 (fr) * 1998-03-05 1999-09-10 Gerard Jean Marie Charpentier Conditionnement pour produit exsudant
EP1238795A1 (de) * 2001-03-05 2002-09-11 Cryovac, Inc. Selbstabsorbierende, gassperrende thermoformbare Folie und daraus hergestellte Behälter zum Verpacken von Lebensmitteln
EP1285861A2 (de) 2001-08-20 2003-02-26 Cryovac, Inc. Verpackung mit absorbierendem Polster
EP1445211A1 (de) 2003-02-10 2004-08-11 Cryovac, Inc. Saugfähiges Element und Verpackung dafür
EP1707499A1 (de) 2005-03-30 2006-10-04 Cryovac, Inc. Produktträger geeignet zum Absorbieren von Flüssigkeiten die von einem Produkt abgesondert werden
WO2011067305A1 (en) * 2009-12-02 2011-06-09 Cryovac, Inc. Self-absorbing gas-barrier receptacle for food packaging and food package obtained therefrom

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3243648A1 (de) * 2016-05-09 2017-11-15 Coopbox Group S.P.A. Mehrschichtige schale mit drainagewirkung und zugehöriges herstellungsverfahren
USD964862S1 (en) 2018-08-21 2022-09-27 Intercontinental Great Brands Llc Tray

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