WO2016207763A1 - Feuille de matériau multicouche pour emballage alimentaire - Google Patents

Feuille de matériau multicouche pour emballage alimentaire Download PDF

Info

Publication number
WO2016207763A1
WO2016207763A1 PCT/IB2016/053528 IB2016053528W WO2016207763A1 WO 2016207763 A1 WO2016207763 A1 WO 2016207763A1 IB 2016053528 W IB2016053528 W IB 2016053528W WO 2016207763 A1 WO2016207763 A1 WO 2016207763A1
Authority
WO
WIPO (PCT)
Prior art keywords
multilayer sheet
sheet material
aluminum
thermoplastic polymeric
polymeric material
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.)
Ceased
Application number
PCT/IB2016/053528
Other languages
English (en)
Inventor
Ennio Corrado
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.)
E-Wenco Srl
Original Assignee
E-Wenco Srl
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 E-Wenco Srl filed Critical E-Wenco Srl
Priority to EP16745156.6A priority Critical patent/EP3313660A1/fr
Publication of WO2016207763A1 publication Critical patent/WO2016207763A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/082—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising vinyl resins; comprising acrylic resins
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/088—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyamides
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/09—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyesters
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • 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
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • 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
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • 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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/42—Alternating layers, e.g. ABAB(C), AABBAABB(C)
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/582—Tearability
    • B32B2307/5825—Tear resistant
    • 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
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging
    • 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
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for

Definitions

  • the present invention relates to a composite material sheet of extremely small thickness but having high strength, to be used in the packaging field, in particular in the field of food packaging.
  • the films of polymeric material are widely used, for example polyethylene, this material being provided with high impermeability characteristics and good tearing strength, but very difficult to handle when made in thicknesses in the order of few microns: how a so-made polyethylene film is able to "crumple” and "glue” on itself without the possibility of being recovered and flattened again, is well known to everybody.
  • films made of aluminum that is a material with high barrier characteristics against UV rays and thus particularly suitable for the protection and preservation of foods.
  • aluminum films currently used for packaging products suffer from poor tearing strength, even if their minimum thickness is kept at least equal to 6-10 microns.
  • aluminum foils with thickness lower than 50-60 ⁇ because of stresses generating in production processes at the rolling mill, have a plurality of micro- holes that, even if not visible to the naked eye, indeed are able to limit the impermeability of the package and the protection of foods against the light.
  • Tetra Pak Another well-known solution, widely and long used for making containers for the transport and preservation of liquids for food use, is that conceived by Tetra Pak, providing for packages made starting from a paper or cardboard substrate intended to give consistency and structural stiffness to the package itself, on which various aluminum and polyethylene layers are coupled.
  • the paper or cardboard substrate has relatively high thickness (in addition to thicknesses of the aluminum and polyethylene layers, which are in the order of 6-20 ⁇ ) , so that such a material de facto is only suitable to make containers, but not for example to wrap products .
  • the International Patent Application WO 2012/156082 describes a package for foods, such as cream cheese, obtained by using a sheet of multilayer material consisting in turn of an aluminum foil coated with a polymer; the thickness of the polymer is between 6 ⁇ and 60 ⁇ . The coating is obtained by extrusion. The so obtained multilayer sheet has high stiffness and can further be laminated with another aluminum foil.
  • General object of the present invention is to overcome the drawbacks mentioned above by providing a sheet material for packaging food products, both in the form of continuous film and single sheets, that is thin enough to allow saving aluminum material, still being sufficiently sturdy and resistant to guarantee optimal preservation of food products and easy to be handled without possible tear of the sheet.
  • a multilayer sheet material according to the invention has been designed, constituted by:
  • thermoplastic polymeric material having flexural stiffness in the range of 3000- 14000 kg/cm 2 , i.e. 294-1373 MPa, and each having thickness equal or less than 10 ⁇ .
  • the aluminum layer/s and the layer/s of thermoplastic polymeric material are coupled alternately one to another, and the multilayer sheet material is embossed.
  • the multilayer material according to the present invention not only exceeds the limits of traditional solutions, as its mechanical strength is sufficient to allow packaging common use products, for example foods, thus avoiding the drawbacks aluminum shows when is directly in contact with foods (such as the closure of the micro- holes inevitably opening in the aluminum following the thinning process upon lamination) , but also the multilayer material offers an advantage well beyond its mechanical properties.
  • the just described multilayer material generates heat when subjected to time-varying magnetic fields, such as for example those produced by conventional induction cookers.
  • the multilayer material object of the present Patent Application provided with an aluminum layer doped with ferromagnetic or ferrimagnetic metals with weight not higher than 6% of the overall weight of the aluminum layer - and preferably 3% -, combines the advantages of high mechanical strength offered by the layer or layers of thermoplastic polymeric material that are coupled to the aluminum layer or layers, to the advantages offered by the systems generating heat by induction and offered by ferromagnetic or ferrimagnetic metals.
  • aluminum is not a ferromagnetic or ferrimagnetic metal; however, the Applicant also found that aluminum behaves as ferromagnetic or ferrimagnetic metals when subjected to time-varying magnetic fields, as those induced by an induction cooker, provided that aluminum is a foil with a thickness lower than 10 ⁇ and doped as described above.
  • the aluminum produced, intended to the field of the food packaging, per se is not 100% pure, but has impurities, such as for example small percentages of other, also ferromagnetic or ferrimagnetic, metals.
  • the multilayer material is thus a candidate to become an innovative system for packaging products, in particular food products, able to guarantee at the same time the correct packaging perfectly air-tight, gas-tight, liquid- tight and solid-tight and, when subjected to magnetic field of an inductor, also the heating and cooking.
  • the packages made by the multilayer material can be disposable food bags or films, that can be integrated to other primary or secondary packages.
  • the multilayer material can be in turn coupled to a rigid plastic polymer, such as that of paint cans, to make such a package susceptible to heating to cook or heat the material inside them.
  • a rigid plastic polymer such as that of paint cans
  • Such a coupling possibility can be extended to each solid material the already existing packages could be made of, thus allowing to give them heating capability and perfect impermeability (e.g. cardboard, paper, plastic) .
  • the thermoplastic polymeric material is made by a homopolymer or a copolymer of at least one olefin.
  • thermoplastic polymeric material is made by an ethylene homopolymer or ethylene copolymer with at least one alpha-olefin C3-C8.
  • thermoplastic polymeric material is made by high density polyethylene (HDPE) .
  • each aluminum layer is in the range 1-5 ⁇ .
  • each layer of thermoplastic polymeric material is in the range 2-10 ⁇ .
  • thermoplastic polymeric material there are exclusively two aluminum layers sandwiching between each other one single layer of thermoplastic polymeric material.
  • the multilayer material can be produced, for example, by spray-coating the thermoplastic polymeric material on an aluminum foil. If there are two aluminum layers, the first sheet on which the thermoplastic polymeric material has been sprayed is laminated with a second aluminum foil.
  • the multilayer material comprises, in addition to the layers described above, one further reinforcing layer of waterglass.
  • one further layer of sodium silicate by spreading it to the above described multilayer, and then subjecting the assembly to heat treatment until obtaining the crystallization or drying of the sodium silicate conferring further stiffness, anyway resulting flexible and impermeable.
  • the thickness of the layer of sodium silicate can be of some microns.
  • FIG. 1 depicts a schematic and partial view of a multilayer sheet material according to the invention.
  • figure 2 depicts a sectional view of a sheet according to the invention, composed of three layers.
  • a portion is depicted of a sheet 10 of multilayer material composed of, in the preferred embodiment, one aluminum layer 11 and one layer 12 constituted by a film of thermoplastic polymeric material whose flexural stiffness is in the range of 3000-14000 kg/cm 2 , corresponding to 294-1373 MPa; the two layers 11 and 12 are coupled one to another.
  • the aluminum layer 11 has thickness equal or less than 10 ⁇ , preferably in the range of 1-5 ⁇ .
  • the layer 12 of thermoplastic polymeric material has thickness equal or less than 10 ⁇ , preferably between 2 ⁇ and 5 ⁇ .
  • aluminum is referred to a material composed of aluminum at least 97% by weight, the remaining percentage being made by one or more metallic elements (up to 2.85% by weight) or other elements (up to 0.15% by weight, each of said other elements could be present up to 0.005% by weight) in order to impart the desired physical and/or mechanical characteristics to the sheet.
  • the thermoplastic polymeric material of the layer 12 is made by a homopolymer or a copolymer of at least one olefin (polyolefin) , such as for example polyethylene (PE) , polypropylene (PP) , polyamide (PA) , polyethylene terephthalate (PET) , polyvinyl chloride (PVC) , polyvinylidene chloride or ethylene/vinyl alcohol copolymer (EVOH) .
  • polyolefin polyethylene
  • PP polypropylene
  • PA polyamide
  • PET polyethylene terephthalate
  • PVC polyvinyl chloride
  • EVOH ethylene/vinyl alcohol copolymer
  • the thermoplastic polymeric material of the layer 12 is made by an ethylene homopolymer or ethylene copolymer with at least one alpha-olefin C3-C8, i.e. having overall 3 to 8 carbon atoms (such as polypropylene, 1-butene, 1-pentene, 1-hexene or 1-octene) .
  • said ethylene homopolymer or copolymer with at least one alpha-olefin C3-C8 is a high density one (HDPE) .
  • HDPE has density in the range of 0.945 - 0.965 g/cm 3 (ASTM D 1505 T) .
  • thermoplastic polymeric material of HDPE has the advantage to confer greater heat resistance to the multilayer material, thus allowing its use for example for packaging hot food products or food products that, once packaged, must be subjected to moderate heating (for example up to about 100-120°C) .
  • thermoplastic polymeric material has the thermoplastic polymeric material
  • thermoplastic polymeric material has softening temperature (ASTM D 1525) in the range of 80- 140°C, more preferably in the range of 90-130°C.
  • thermoplastic polymeric material can further comprise appropriate amounts of substances (for example, antibacterial compounds, antioxidants compounds, etc.) adapted to improve the characteristics of the sheet material, in connection with its function of packaging food products .
  • substances for example, antibacterial compounds, antioxidants compounds, etc.
  • the layer of polymeric material can be coupled to one of the two sides of the aluminum layer according to the following methods.
  • the layer 12 of thermoplastic polymeric material can be produced separately, with the desired thickness, and then coupled by lamination process to the aluminum layer 11.
  • the layer 12 of polymeric material is spray-coated (technique called in English "Thermal Spray Coating"), in the desired grammage, to one of the two sides of the aluminum layer 11, as well known to the technician.
  • the sheet 10 shows an embossing 13 obtained by passing the sheet between a pair of rollers, at least one of which having a relief surface with a pattern corresponding to the desired embossing pattern, as well known to the skilled person.
  • the relief part of the embossing is on the sheet surface constituted by the aluminum layer 11 and the recessed part of the embossing is on the surface constituted by the layer 12 of thermoplastic polymeric material, or vice versa.
  • the coupling of the layer 12 of thermoplastic polymeric material with the aluminum layer 11 allows compensating for the problem of the presence of micro-holes that, as reported above, are inevitably generated during the aluminum lamination process to reduce it to a sheet with a thickness of few tens of microns or few microns.
  • the layer of thermoplastic polymeric material allows restoring the complete impermeability of the aluminum foil against air and liquids.
  • the layer of thermoplastic polymeric material also allows protecting more the aluminum layer 11 against oxidation phenomena, situation to be avoided as much as possible when food products are packaged.
  • the layer 12 of thermoplastic polymeric material provides the sheet 10 with an increased flexibility, increasing the tearing strength of the simple aluminum layer.
  • Such an effect is particularly pronounced in case the thermoplastic polymeric material is made by HDPE .
  • the embossing 13 (thanks to its "wavy" pattern, involving both the aluminum layer and the layer of polymeric material) further provides for a material reserve cooperating with the flexibility given by the layer 12 of polymeric material in order to facilitate the foldability of the sheet 10 during the wrapping of the product, following all the shape irregularities, aiding to greatly increase the tearing strength of the sheet 10 and thus keeping the protective characteristics towards the wrapped food product.
  • the multilayer sheet material according to the invention can be provided both in the form of continuous film wrapped around a cardboard or plastic core, and in the form of single sheets pre-cut in the desired shape and size.
  • the multilayer material can be cut in single sheets by the embossing treatment the material itself is subjected to.
  • the sheet 10 can advantageously be used with the layer 12 of polymeric material in contact with the food product to be packaged, however it is clear that it can also be used with the aluminum layer 11 in contact with the product if the circumstances make it preferable.
  • FIG 2 a section of a possible further embodiment of the multilayer sheet material according to the invention is schematically depicted.
  • the second aluminum layer 11' can advantageously be coupled, by lamination process, to the surface of the polymeric material 12 on the side opposite to the first aluminum layer 11.
  • This sandwich configuration allows further increasing the strength of the sheet 10 and, if the two aluminum layers 11, 11' are selected with the same thickness characteristics, they provide to the sheet 10 uniformity of behavior in any direction it is folded in wrapping the products.
  • the two aluminum layers could be expressly selected of different thickness, in order to obtain specific characteristics of behavior in use.
  • the upper limits of the thickness ranges reported above i.e. 10 ⁇ per each of the two materials
  • the upper limits of the thickness ranges reported above could be understood as overall thickness of the layers of the respective material.
  • each of the two aluminum layers 11, 11' could for example have thickness equal to 3-5 ⁇ .
  • an aluminum alloy comprising 1-2% by weight, based on the weight of the alloy, iron or other ferromagnetic or ferrimagnetic material (as described for example in the Italian Patent Application MI2014A000801 ) could be used, in order to provide adequate thermo- inductive capabilities to the sheet 10 if the latter is subjected to time-varying electromagnetic fields.
  • the so made multilayer material is well suited to the realization of food bags, for wrapping and directly cooking foods stored inside it on induction cookers.
  • a bag has been made with a multilayer sheet having overall thickness of 10 ⁇ , embossed as described above, folded on itself and heat-sealed on two open sides.
  • a fennel of 250 about grams, divided in two halves, and a pinch of salt were put in the bag. Subsequently, the left- open third side is heat-sealed.
  • the obtained bag, completely closed around the two fennel halves, has been placed on an induction plate powered at 200 watts for the duration of 15 minutes. The bag swelled thus creating an inner microclimate allowing a complete and uniform cooking of the fennel similar to steam cooking, with final browning of the surface in contact with the embossed multilayer bag and with the plate.
  • a bag has been made, starting from a multilayer sheet of 10 ⁇ embossed as described above, folded on itself and heat-sealed on two open sides.
  • a frozen chicken thigh of about 150 grams and a pinch of salt were put in.
  • the bag has been completely closed, by heat-sealing the third side that remained open until that moment.
  • the closed bag has been placed on an induction plate in contact therewith, powered at 200 watt for the duration of 25 minutes.
  • the bag swelled thus creating an inner microclimate allowing the defreezing of the chicken thigh and its complete and uniform cooking similar to steam cooking, with final browning of the surface in contact with the embossed multilayer bag and with the plate.

Landscapes

  • Laminated Bodies (AREA)
  • Wrappers (AREA)

Abstract

La présente invention a trait à un matériau en feuille multicouche (10) qui est constitué : - d'une ou plusieurs couches d'aluminium (11, 11'), chacune ayant une épaisseur inférieure ou égale à 10 μm ; - d'une ou plusieurs couches (12) de polymère thermoplastique ayant une rigidité à la flexion comprise entre 294 et 1 373 MPa, chaque couche ayant une épaisseur inférieure ou égale à 5 µm. Les couches d'aluminium (11, 11') et les couches (12) de polymère thermoplastique sont couplées en alternance les unes aux autres, et ledit matériau en feuille multicouche (10) est gaufré (13).
PCT/IB2016/053528 2015-06-24 2016-06-15 Feuille de matériau multicouche pour emballage alimentaire Ceased WO2016207763A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16745156.6A EP3313660A1 (fr) 2015-06-24 2016-06-15 Feuille de matériau multicouche pour emballage alimentaire

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102015000027286 2015-06-24
ITUB20151646 2015-06-24

Publications (1)

Publication Number Publication Date
WO2016207763A1 true WO2016207763A1 (fr) 2016-12-29

Family

ID=54364446

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2016/053528 Ceased WO2016207763A1 (fr) 2015-06-24 2016-06-15 Feuille de matériau multicouche pour emballage alimentaire

Country Status (2)

Country Link
EP (1) EP3313660A1 (fr)
WO (1) WO2016207763A1 (fr)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3589975A (en) * 1967-03-23 1971-06-29 Reynolds Metals Co Composite sheet of plastic and metallic material and method of making the same
FR2557026A1 (fr) * 1983-12-26 1985-06-28 Alsacienne Aluminium Materiau souple en feuille, notamment pour l'emballage et le surbouchage
WO1994019184A1 (fr) * 1993-02-25 1994-09-01 Alusuisse-Lonza Services Ag Materiau composite
WO1994027818A1 (fr) * 1993-05-24 1994-12-08 Reynolds Metals Company Stratifie en feuilles d'aluminium et procede de recyclage
JPH11222262A (ja) * 1998-02-04 1999-08-17 Asahi Chem Ind Co Ltd 食品包装材
EP2314450A1 (fr) * 2009-10-20 2011-04-27 Ehrno Flexible A/S Feuille d'emballage, notamment pour les produits laitiers telle que le beurre et le fromage
WO2012156082A1 (fr) * 2011-05-16 2012-11-22 Amcor Flexibles Kreuzlingen Ltd Film d'emballage
WO2013102918A2 (fr) * 2011-11-11 2013-07-11 Bilcare Limited Film-feuille comprenant une image intégrée et son procédé de préparation
WO2015151027A1 (fr) * 2014-04-03 2015-10-08 Gimsa S.R.L. Matériau recyclable
EP2940168A1 (fr) * 2014-04-30 2015-11-04 Ennio Corrado Film constitué d'un alliage d'aluminium et de fer, utilisation de ce matériau en combinaison avec un champ magnétique oscillant et ustensile de cuisine de cuisson par induction comprenant un tel film

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3589975A (en) * 1967-03-23 1971-06-29 Reynolds Metals Co Composite sheet of plastic and metallic material and method of making the same
FR2557026A1 (fr) * 1983-12-26 1985-06-28 Alsacienne Aluminium Materiau souple en feuille, notamment pour l'emballage et le surbouchage
WO1994019184A1 (fr) * 1993-02-25 1994-09-01 Alusuisse-Lonza Services Ag Materiau composite
WO1994027818A1 (fr) * 1993-05-24 1994-12-08 Reynolds Metals Company Stratifie en feuilles d'aluminium et procede de recyclage
JPH11222262A (ja) * 1998-02-04 1999-08-17 Asahi Chem Ind Co Ltd 食品包装材
EP2314450A1 (fr) * 2009-10-20 2011-04-27 Ehrno Flexible A/S Feuille d'emballage, notamment pour les produits laitiers telle que le beurre et le fromage
WO2012156082A1 (fr) * 2011-05-16 2012-11-22 Amcor Flexibles Kreuzlingen Ltd Film d'emballage
WO2013102918A2 (fr) * 2011-11-11 2013-07-11 Bilcare Limited Film-feuille comprenant une image intégrée et son procédé de préparation
WO2015151027A1 (fr) * 2014-04-03 2015-10-08 Gimsa S.R.L. Matériau recyclable
EP2940168A1 (fr) * 2014-04-30 2015-11-04 Ennio Corrado Film constitué d'un alliage d'aluminium et de fer, utilisation de ce matériau en combinaison avec un champ magnétique oscillant et ustensile de cuisine de cuisson par induction comprenant un tel film

Also Published As

Publication number Publication date
EP3313660A1 (fr) 2018-05-02

Similar Documents

Publication Publication Date Title
EP3169518B1 (fr) Procede de fabrication d'un materiau d'emballage stratifie, et materiau d'emballage stratifie
CA1219800A (fr) Stratifie, et sa fabrication
JP5139422B2 (ja) シール及び剥離可能なフィルム
CN101568475B (zh) 包装层压板和制造该包装层压板的方法及包装容器
US9073689B2 (en) Microwave energy interactive insulating structure
HUP0401779A2 (hu) Csomagolólaminátum retortálható csomagolószerhez
EP1831007A1 (fr) Stratifie d'emballage, son procede de fabrication et contenant d'emballage
TWI801583B (zh) 噴口袋及製造其之方法
WO2014024913A1 (fr) Récipient en papier multicouche
US20110142377A1 (en) Laminate Bag Having Windows
JP2019104501A (ja) 包装用積層体
TWI583549B (zh) 積層體及使用其的包裝材
JP6051899B2 (ja) カップ型紙容器の製造方法及びカップ型紙容器
EP3313660A1 (fr) Feuille de matériau multicouche pour emballage alimentaire
JPH051388Y2 (fr)
WO2016207826A2 (fr) Récipient en forme de cuve pour le confinement et le conditionnement d'aliments, constitué de matériau en feuille multicouche et procédé associé
JP3195068U (ja) 包装袋
JP2016113176A (ja) 包材用シート、容器用蓋材および包装体
JP7124394B2 (ja) 易開封包装袋
CA2971840A1 (fr) Procedes de fabrication de recipients en carton a partir d'ebauches en carton ayant des films retractables fixes a celles-ci
CN208006409U (zh) 一种包装层压板以及由该包装层压板制成的包装容器
JP7007921B2 (ja) バリア紙カップ
US20260109520A1 (en) Ovenable flexible packaging structures
SE1951401A1 (en) Cover for disposable packaging
EP3487694A1 (fr) Procédé de production d'un matériau d'emballage, procédé de production d'un emballage, matériau d'emballage, et emballage

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16745156

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2016745156

Country of ref document: EP