WO2024115617A1 - Stratifié, en particulier pour produire un emballage, utilisation du stratifié pour produire un emballage, emballage produit à partir du stratifié, et procédé de production du stratifié - Google Patents

Stratifié, en particulier pour produire un emballage, utilisation du stratifié pour produire un emballage, emballage produit à partir du stratifié, et procédé de production du stratifié Download PDF

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Publication number
WO2024115617A1
WO2024115617A1 PCT/EP2023/083632 EP2023083632W WO2024115617A1 WO 2024115617 A1 WO2024115617 A1 WO 2024115617A1 EP 2023083632 W EP2023083632 W EP 2023083632W WO 2024115617 A1 WO2024115617 A1 WO 2024115617A1
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WO
WIPO (PCT)
Prior art keywords
layer
blown film
laminate
film
extrusion lamination
Prior art date
Application number
PCT/EP2023/083632
Other languages
German (de)
English (en)
Inventor
Eddy Daelmans
Marco HILTY
Wojciech Skalbani
Ashwini Kumar Singh
Original Assignee
Huhtamaki Flexible Packaging Germany Gmbh & Co. Kg
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 Huhtamaki Flexible Packaging Germany Gmbh & Co. Kg filed Critical Huhtamaki Flexible Packaging Germany Gmbh & Co. Kg
Publication of WO2024115617A1 publication Critical patent/WO2024115617A1/fr

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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
    • B32B1/00—Layered products having a non-planar shape
    • 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
    • B32B15/20—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
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (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
    • 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
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/03—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers with respect to the orientation of features
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
    • B32B2250/05—5 or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
    • B32B2250/24—All layers being polymeric
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B32B2255/205—Metallic coating
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • 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
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/102—Oxide or hydroxide
    • B32B2264/1022—Titania
    • 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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/402—Coloured
    • B32B2307/4023—Coloured on the layer surface, e.g. ink
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/41—Opaque
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • 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
    • B32B2307/514—Oriented
    • 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
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    • B32B2307/514—Oriented
    • B32B2307/516—Oriented mono-axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/514—Oriented
    • B32B2307/518—Oriented bi-axially
    • 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
    • B32B2307/70—Other properties
    • B32B2307/718—Weight, e.g. weight per square meter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
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    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B32B2307/737—Dimensions, e.g. volume or area
    • B32B2307/7375—Linear, e.g. length, distance or width
    • B32B2307/7376—Thickness
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    • B32B2307/00—Properties of the layers or laminate
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    • B32B2307/75—Printability
    • 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
    • B32B2439/40—Closed containers
    • 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
    • B32B2439/40—Closed containers
    • B32B2439/46—Bags

Definitions

  • the invention relates to a laminate according to the preamble of claim 1, the use of such a laminate for producing a packaging according to the preamble of claim 16 and a packaging produced from such a laminate according to the preamble of claim 17 and furthermore to a method for producing the laminate according to the preamble of claim 18.
  • Laminates for producing packaging such as tubular bags with or without a standing bottom, have been known for a long time.
  • such laminates usually consist of a printable outer layer and a sealing layer, usually attached to the outer layer by means of an adhesive.
  • To produce the packaging either two separate blanks of the laminate are sealed together using the sealing layers of the individual blanks facing each other along the outer edge of the blanks to create a packaging volume, whereby a filling opening of the packaging is of course only closed after the contents have been filled into the packaging.
  • a single blank can be used that is folded in such a way that the outer edges of the folded blank lie on top of each other in such a way that they are in turn hot-sealed together by means of the sealing layers that are then facing each other, whereby the filling opening in turn is only closed after the contents have been filled into the Packaging is sealed.
  • the two blanks or the folded blank are always sealed together by pressing sealing jaws onto the outside of the respective outer layer adjacent to the sealing layer, which have such a high temperature that the two sealing layers to be sealed together soften so that the respective polymer chains of the respective sealing medium can fuse together, thereby ensuring a tight seal and, as a result, a reliable closure of the packaging.
  • the sealing layers used to date according to the state of the art have a very high thickness, i.e. a thickness in the range of greater than 50 pm, but usually even in the range of 100 pm to 140 pm, a very high heat input is necessary to ensure a good and therefore tight seal, which must be applied either via a very high temperature of the sealing jaws or via a very long dwell time of the sealing jaws on the respective outer layer of the laminate.
  • the dwell time of the sealing jaws on the respective outer layer of the laminate can also be extended.
  • the material used there is no risk of denaturation of the outer layer, provided that the outer layer does not completely melt due to the long dwell time, but the production speed drops significantly due to the long dwell times that the sealing jaws then have to spend on the respective outer layers of the laminate, which in turn has an extremely negative effect on productivity when producing the packaging and closing the pack after it has been filled.
  • the invention is based on the object of providing an alternative, cost-effective laminate that is suitable for producing packaging and avoids the disadvantages described above. Furthermore, the object of the invention is also to enable the use of such a laminate for producing packaging and to provide packaging made from such a laminate. This object is achieved according to the invention with a laminate according to claim 1, a use of such a laminate for producing a packaging according to claim 16 and by a packaging produced from such a laminate according to claim 17 and further by a method for producing the laminate according to claim 18.
  • the object of the invention is achieved by a laminate, in particular for producing packaging, with an outer layer optionally having a design and a sealing layer arranged opposite a visible side of the outer layer, wherein the sealing layer is preferably a low-temperature sealing layer which is designed as a first blown film or as the outermost layer of a first blown film, and a first extrusion laminating layer is arranged between the outer layer and the blown film.
  • the sealing layer is preferably a low-temperature sealing layer which is designed as a first blown film or as the outermost layer of a first blown film, and a first extrusion laminating layer is arranged between the outer layer and the blown film.
  • the sealing layer is designed as a low-temperature sealing layer.
  • the term low-temperature sealing layer in this context means that the sealing layer according to the invention is a very thin layer in the range of 2 - 40 pm, preferably in the range of 3 - 30 pm and particularly preferably in the range of 4 - 20 pm, which is either itself designed as a blown film, i.e. as a single-layer blown film, or as the outermost layer of a multi-layer blown film.
  • the essential advantage of the blown film serving as a low-temperature sealing layer, or outermost layer of the blown film, is that the material thickness of this sealing layer according to the invention is very thin and heating to an initial sealing temperature when sealing jaws are applied to the outer layer occurs very quickly, i.e. quasi spontaneously, and not, as in the previous state of the art, in which the thickness of the sealing layer was in the range of greater than 50 pm, but mostly even in the range of 100 pm to 140 pm, where a large mass of sealing medium must first be heated in order to reach an initial sealing temperature on the outermost side of the laminate opposite the visible side of the laminate.
  • the initial sealing temperature is understood to be the temperature at which the outer surface of the sealing layer melts, so that this outer surface of the sealing layer can fuse with a counterpart to be sealed.
  • the laminate according to the invention has a first extrusion lamination layer between the outer layer and the blown film. In this way, a connection between the outer layer and the blown film is possible without the use of adhesive, the laminate according to the invention being formed as part of an extrusion lamination process in which the extrusion lamination layer is introduced in a molten state between the outer layer and the blown film.
  • a second extrusion lamination layer facing the outer layer, in particular directly adjacent to the outer layer, and a second blown film connected to the second extrusion lamination layer are arranged between the first extrusion lamination layer and the outer layer, wherein the second blown film is connected to the first extrusion lamination layer.
  • the base laminate according to the invention described above is expanded in a sandwich-like manner by a second extrusion lamination layer and a second blown film adjacent thereto, in which case the second extrusion lamination layer represents the connecting layer to the outer layer, while the second blown film is the connecting layer to the first extrusion lamination layer, to which in turn, as already explained, the first blown film with its outer sealing layer is connected.
  • the second extrusion lamination layer is introduced into the layer composite of the laminate according to the invention as part of a tandem extrusion lamination, ie simultaneously with the first extrusion lamination layer, there is thus an intimate connection between the individual layers throughout the entire composite, which at the same time ensures optimal heat transfer from the outer layer to the surface of the sealing layer.
  • the sandwich-like structure of the second blown film, the first extrusion laminated layer and the first blown film according to the invention significantly increases the stability of the laminate structure, even if the combined thickness of the second blown film, the first extrusion laminated layer and the first blown film is less than the original, ie according to the prior art, thick and originally stability-providing sealing layer used for this purpose.
  • the first blown film and/or the second blown film are produced from a melt of the respective layers of the polymers forming the first and the second blown film and are thus each unstretched.
  • the first blown film and/or the second blown film are composed of a plurality of blown film layers, preferably stretched, in particular stretched in the machine direction and/or transversely to the machine direction. Furthermore, the first blown film and/or the second blown film in their respective entirety each define a layer of the laminate.
  • stretching of a film is understood exclusively to mean stretching the film below the melting point, typically 5°C to 20°C below the melting point, of the film, i.e. of the polymer forming the film or, in the case of a multilayer film, of the polymers forming the multilayer film.
  • This stretching results in the polymers, which are largely randomly present in the film, being aligned in the stretching direction, whereby this stretching direction can be in the machine direction and/or transverse to the machine direction.
  • the orientation of the plastic film during stretching can, above all, improve the stiffness, tensile strength and toughness of the film.
  • a certain orientation of molecules of a polymer during the production of a film by flat film extrusion or blown film extrusion, i.e. from a respective melt of the polymer, does not, by definition, represent stretching of a film produced by such a process, as is already known, for example, from EP 4 076 944 B1.
  • the first and the second blown film can thus have different
  • the first and second blown films can each have an identical structure.
  • the first and second blown films can also have different properties and a different level of transparency.
  • the first and second blown film can have different material qualities, whereby the second inner blown film can have a lower material quality than the first outer blown film.
  • the second inner blown film can have greater layer thicknesses, or material thicknesses, so that the second inner blown film contributes mainly to the structural safety and rigidity as well as stability of the laminate according to the invention, while the first outer blown film can be thinner than the second inner blown film and is crucial for very good sealability of the laminate according to the invention.
  • laminate layers enclosed in the laminate can be of lower quality, since their visual impression, for example, plays no role for the laminate according to the invention, since they are not visible because they are enclosed between the outer laminate layers. It should be noted, however, that any lower quality of inner laminate layers used still ensures very good bonding between the individual laminate layers according to the invention.
  • the first blown film and/or preferably the second blown film can have at least one barrier layer material which is integrated in the form of a blown film layer into the first blown film and/or preferably the second blown film.
  • the barrier layer material is selected from optionally stretched high-density polyethylene (HDPE), ethylene-vinyl alcohol copolymer (EVOH) and/or polyamide in order to give the respective blown film and thus also the laminate according to the invention a high degree of impermeability to gases on the one hand, but also to moisture and water vapor.
  • HDPE high-density polyethylene
  • EVOH ethylene-vinyl alcohol copolymer
  • polyamide polyamide
  • the laminate according to the invention can have at least one further barrier layer which is in the form of a metallized layer, an aluminum oxide and/or silicon oxide layer, or a metal layer, in particular aluminum or Alubond, which is arranged adjacent to the first blown film and/or preferably the second blown film, particularly preferably on the side of the second blown film facing the outer layer.
  • the term "Alubond” refers, with reference to EP 3 067 437 B1, to a process for depositing aluminum metal in an oxygen-rich atmosphere on a surface, such as the first blown film and/or preferably the second blown film, so that a metal layer virtually coated with aluminum oxide in the form of an aluminum oxide-aluminum metal-aluminum oxide (AlO x -Al- AlOx) layer is deposited on the surface of the blown film to be coated.
  • the blown film surface to be coated is exposed to oxygen both before and during the metal deposition so that an oxygen-rich metal oxide layer is formed between the film web surface and the deposited metal, which significantly improves the adhesion between the film surface and the aluminum-containing layer.
  • the permeability of the laminate according to the invention to water vapor in an atmosphere with 85% relative humidity can be reduced to less than 0.5 g/m 2 /day and, when using a metallized barrier layer in combination with EVOH, even to a value of less than 0.1 g/m 2 /day.
  • the permeability of the laminate according to the invention to oxygen at a temperature of 23 °C and in an atmosphere with 85% relative humidity can be reduced to less than 0.5 cm 3 /m 2 /day and, when using a metallized barrier layer in combination with EVOH, even to less than 0.2 cm 3 /m 2 /day.
  • the oxygen permeability measurements were carried out in accordance with DIN standard 53380-3.
  • the water vapor permeability measurements were carried out in accordance with DIN standard 53122-2.
  • the first blown film and/or the second blown film has an outermost layer made of a terpolymer consisting of a mixture of ethylene, acrylic acid and an acrylate.
  • a terpolymer is used which is sold under the name "NucrelTM AE", the The Dow Chemical Company Global Dow Center, 2211 HH Dow Way, Midland, Michigan 48674 (US).
  • the terpolymer represents the outermost layer of the first blown film if the laminate according to the invention is not formed in a sandwich-like manner with a second extrusion lamination layer and a second blown film, but exclusively with a first extrusion lamination layer and a first blown film.
  • the laminate according to the invention also has a second extrusion lamination layer and a second blown film in the manner described above in addition to the first extrusion lamination layer and the first blown film, according to the invention preferably only the second blown film is provided with the terpolymer, with the terpolymer in this case again representing the outermost layer of the second blown film.
  • the outermost layer of the first blown film or the second blown film is to be understood as the layer of the respective blown film that faces the outer layer in the laminate.
  • the first blown film and/or the second blown film comprise titanium dioxide.
  • the first blown film or the second blown film can be colored white by using titanium dioxide, whereby it is sufficient, as desired, to provide either the first blown film or the second blown film with the white pigment dye.
  • the outer layer of the laminate according to the invention is selected according to the invention from a transparent film or a non-transparent film and optionally a print forming the design of the outer layer, wherein the In the case of a transparent film, printing is carried out as reverse printing, i.e. as printing on the side of the transparent film facing the sealing layer, or as frontal printing on the opposite side, i.e. the outside of the transparent film, and in the case of a non-transparent film, as frontal printing on the outside of the non-transparent film.
  • the material of the transparent film is polyethylene terephthalate, in particular oriented polyethylene terephthalate, or alternatively a polyolefin, in particular biaxially oriented polypropylene, or particularly preferably, optionally a polyethylene stretched in the machine direction.
  • the first blown film and/or the second blown film comprises low-density polyethylene, in particular LLDPE, as a stability-providing material.
  • LLDPE is a preferred material for producing thin blown films and, as has been shown according to the invention, is also a good sealable material that is suitable for producing very stable seals even in particularly thin layers, especially with one another, as is required in the context of the present invention for producing packaging using the laminate according to the invention.
  • LLDPE is a plastic that can be produced inexpensively, is easily recyclable and is harmless to health.
  • the second blown film is a composite of the following layers: terpolymer / HDPE / primer / EVOH / primer / HDPE / LLDPE or metallocene.
  • the use of such a composite can produce a high-barrier laminate with very good tightness values in terms of water vapor permeability and oxygen permeability, whereby the water vapor impermeability and oxygen impermeability can be further improved by stretching, in particular in the uniaxial direction, ie in the blowing direction, as has been found according to the invention.
  • stretching, or stretched, and orientation, or oriented are used synonymously within the scope of this invention.
  • the layers of the laminate have the following thicknesses or application weights:
  • An essential aspect of the invention is that instead of a thick sealing layer according to the prior art, which is always thicker than 50 pm, usually even has a thickness in the range of 100 pm to 140 pm, for producing a package, or sealing with itself or an identical corresponding sealing layer, thin layers according to the invention are used which are at most 60 pm, but preferably thinner than or equal to 50 pm.
  • the laminate has a polyolefin content of greater than 90%, preferably greater than 95%, in particular a polyethylene content of greater than 90%, preferably greater than 95%.
  • a polyolefin content of the laminate according to the invention leads to particularly good recyclability of the laminate according to the invention and can be achieved according to the invention by using polyethylene for the outer layer, in particular stretched polyethylene, which has a special rigidity and a particularly good printability.
  • polyethylene is used according to the invention for the first and second extrusion lamination layers; the same applies to the production of the first and second blown film, which also have polyethylene as the main stability materials, namely either high-density polyethylene, in particular HDPE, or low-density polyethylene, in particular LLDPE.
  • non-polyethylene materials such as adhesives can thus be largely dispensed with according to the invention, so that their proportion can be limited to less than 10%, preferably to less than 5%, which optimizes the mechanical recyclability of the laminate according to the invention.
  • the laminate according to the invention is produced by using extrusion lamination, in particular by means of tandem extrusion lamination, which makes it possible to produce an extremely intimately bonded and at the same time very thin composite of essentially two or three basic functional layers consisting of an outer layer and a first blown film or of an outer layer, a second blown film and a first blown film, wherein these basic functional layers, in particular the first blown film and the second blown film, can in turn contain further functional materials, such as barrier layers or dyes or terpolymers.
  • the object according to the invention is further achieved by the use of a laminate according to the above statements for producing a packaging, in particular a particularly stable tubular bag packaging.
  • the object according to the invention is also achieved by a packaging which is made from the laminate according to the invention.
  • the object according to the invention is also achieved by a method for producing a laminate as described above.
  • the object of the invention is achieved by a method in which the following steps are carried out:
  • the laminate according to the invention is suitable for flexible packaging, wherein the laminate can in particular be wound onto rolls and is suitable for the production of bag packaging in particular for all filling goods, for which polyethylene adhesive films, in particular with a thickness of significantly more than 50 pm, generally 100 pm to 140 pm, LLDPE film adhesive, for example with the following structure: oriented polyethylene terephthalate (OPET) with a thickness of 12 pm / printing layer / primer / LLDPE film adhesive >50 pm were used so far according to the state of the art.
  • OPET oriented polyethylene terephthalate
  • the laminate according to the invention is produced by means of a single extrusion lamination or by means of a tandem extrusion lamination, with which, for example, a laminate with the following layer structure can be produced: oriented polyethylene terephthalate (OPET) with a thickness of 12 pm / printing layer / primer / second, ie inner extrusion lamination layer with a polyethylene coating weight of 20 g/m 2 / second, ie inner blown film made of or substantially with linear low density polyethylene, in particular LLDPE, with a total blown film thickness of 40 pm / first, i.e. outer extrusion lamination layer with a polyethylene application weight of 20 g/m 2 / first, i.e. outer blown film made of or substantially with linear low density polyethylene, in particular LLDPE, with a total blown film thickness of 40 pm.
  • OPET oriented polyethylene terephthalate
  • the advantages of the laminate according to the invention compared to a laminate previously used in the prior art for such purposes consist in very fast, precise and cost-effective manufacturability, among other things because thin LLDPE films can be produced much faster and therefore more productively than thick LLDPE films, since it has been found according to the invention that when producing thin LLDPE blown films with the same mass output, a significantly higher area output, i.e. a higher area output essentially proportional to the lower thickness, can be achieved.
  • the laminate according to the invention shows a guaranteed high bond strength, excellent chemical resistance, since the laminate according to the invention does not contain any adhesive, a significant cost advantage, since the laminate according to the invention does not require any curing time during production, again because no adhesive was used during production, a more cost-effective production process due to the blown film and single or tandem extrusion technology, among other things also because according to the invention an inexpensive resin is used for the sandwich LLDPE film.
  • a sealing layer that is significantly thinner than the prior art and above all can be produced at lower temperatures and therefore more quickly can be produced at the seam of the laminate layers during the production of a packaging, so that a clearly better packaging value (added value) is achieved compared to an adhesive lamination known from the prior art.
  • novel laminate according to the invention offers better "drop test” results compared to both adhesive laminates currently known from the prior art and laminates known from the prior art which use a thick, i.e. at least 50 pm, but usually 100 pm to 140 pm thick LLDPE sealing film.
  • the laminate according to the invention thus has the advantage that it can be produced by means of a single or tandem extrusion lamination of a printed or printable film, the can consist of a wide variety of materials, such as oriented polyethylene terephthalate (OPET), biaxially oriented polypropylene (BOPP), oriented polyamide (OPA), slightly monoaxially oriented polyethylene (MDO-PE), to name just a few examples, with an extremely thin primer being applied over the entire surface of the printed side.
  • OPET oriented polyethylene terephthalate
  • BOPP biaxially oriented polypropylene
  • OPA oriented polyamide
  • MDO-PE slightly monoaxially oriented polyethylene
  • the application weight of the solvent-based or preferably water-based primer is in a range of 0.2 - 2 g/m 2 , preferably in a range of 0.3 - 1 g/m 2 and particularly preferably in a range of 0.4 - 0.6 g/m 2 , which according to the invention corresponds to layer thicknesses in the range of 0.2 - 2 pm, preferably in the range of 0.3 - 1 pm and particularly preferably in the range of 0.4 - 0.6 pm.
  • the other aforementioned layers are applied simultaneously in the course of the above-described single or tandem extrusion lamination, namely a thin extrusion polyethylene coating with a polyethylene application weight of preferably 20 g/m 2 ⁇ 5 g/m 2 and a thin blown film with a total thickness of less than 50 pm, preferably in the range of 25 pm to 40 pm in the case of single extrusion lamination or optionally, as mentioned above, in a sandwich-like manner, namely in the case of tandem extrusion lamination.
  • the main advantages of the invention are therefore that the problem of the expensive adhesive lamination of thick (>50 pm) LLDPE films onto a printing substrate, which has always been used up to now, could be overcome by applying single or tandem extrusion composites consisting of, in the case of single extrusion, a thin ( ⁇ 50 pm) LLDPE film and an extrusion polyethylene coating or, in the case of tandem extrusion, two thin ( ⁇ 50 pm) LLDPE films and two extrusion polyethylene coatings with a sandwich-like structure to the printing substrate, which may not yet be printed on.
  • the invention made it possible to overcome the previously extremely low bond strengths of extrusion-laminated thick (>50 pm) LLDPE films by using thin ( ⁇ 50 pm) LLDPE films in accordance with the invention together with the aforementioned extrusion coating, whereby in the case of using a tandem extrusion system, two or, with an extrusion system extended beyond a tandem extrusion system, more thin ( ⁇ 50 pm) LLDPE films together with the associated extrusion polyethylene coating can be used for application to a carrier film, such as a printing carrier.
  • a carrier film such as a printing carrier.
  • Fig. 1 is a schematic representation of a laminate according to the prior art
  • Fig. 2 is a schematic representation of a laminate according to the invention according to a first embodiment
  • Fig. 3 is a schematic representation of the laminate according to Fig. 2 with a separately shown printing layer;
  • Fig. 4 is a schematic representation of a laminate according to the invention according to a second embodiment
  • Fig. 5 is a schematic representation of the laminate according to the invention according to a third embodiment
  • Fig. 6 is a schematic representation of the laminate according to the invention according to Fig. 4 with different outer layer;
  • Fig. 7 is a schematic representation of the laminate according to the invention according to Fig. 5 with different outer layer;
  • Fig. 8 is a schematic representation of the film layers of the second, i.e. inner, blown film according to an embodiment of the invention.
  • Fig. 9 is a schematic representation of the film layers of the second, i.e. inner, blown film according to a further embodiment of the invention.
  • Fig. 1 shows a schematic representation of a laminate according to the prior art, in which a transparent film 20 with a layer thickness of 12 pm made of oriented polyethylene terephthalate using the reverse printing process, i.e. printed from behind, i.e. provided with a design.
  • An adhesive layer 40 with an application weight of 3 g/m 2 is applied to the printing layer 30, as has always been the case in the prior art, which in turn was necessary in order to connect a sealing layer 50 with a thickness of over 120 - 140 pm to the printing layer 30.
  • the very thick sealing layer 50 is used in the course of producing a package, in particular a tubular bag package, to be fused, i.e.
  • sealing layer 50 sealed, with an equally thick sealing layer 50 of a correspondingly constructed second laminate cut or, if appropriate, a section of a folded-over section of the same laminate by melting and melting the surfaces of the two sealing layers 50 which then face each other, which is why the sealing layer 50 according to the prior art has no orientation in order to maintain its sealability, i.e. is therefore unstretched.
  • Fig. 2 shows a schematic representation of a laminate 10 according to the invention according to a first embodiment, wherein an outer layer 15 is coated in the course of a single extrusion lamination with a first lamination layer 60, which represents a first outer extrusion lamination layer, and simultaneously coated with a first outer blown film 70, which represents or has a low-temperature sealing layer 78.
  • Fig. 3 shows a schematic representation of the laminate 10 according to Fig. 2 with a separately shown print layer, wherein the laminate 10 according to Fig. 3 corresponds to the laminate 10 according to the invention according to Fig. 2, but wherein the outer layer 15 is shown in more detail, namely in the form of a transparent film 20 which is provided with a reverse print layer 30.
  • the transparent film 20 and the print layer 30 together represent the outer layer 15.
  • Fig. 4 shows a schematic representation of a laminate 10 according to the invention according to a second embodiment, wherein the laminate 10 is constructed identically to the laminate 10 according to Fig. 3 in terms of its layer sequence, with the difference that a second inner extrusion lamination layer 65 and a second inner blown film 75 are embedded in a sandwich-like manner between the outer layer 15 and the first outer extrusion lamination layer 60.
  • the first outer blown film 70 simultaneously represents a low-temperature sealing layer 78 that is only 40 pm thick.
  • second inner extrusion lamination layer 65 with an application weight of 20 g/m 2 / second inner blown film 75 made of LLDPE with a layer thickness of 40 pm / first outer extrusion lamination layer 60 with an application weight of 20 g/m 2 / first outer blown film 70 made of LLDPE with a layer thickness of 40 pm.
  • the second inner blown film 75 can have a terpolymer layer 120 facing the print layer 30, as shown by way of example in Fig. 9.
  • Examples of concrete layer structures of the laminate 10 according to the invention according to Fig. 4 can be, for example, the following layer sequences:
  • Transparent film 20 namely oriented polyethylene terephthalate with a layer thickness of 12 pm / reverse printing layer 30, for example as a gravure or flexographic printing layer / second inner laminating layer 65, namely polyethylene with an application weight of 20 g/m 2 / second inner blown film 75, namely LLDPE film with a layer thickness of 40 pm / first outer laminating layer 60, namely polyethylene with an application weight of 20 g/m 2 / first outer blown film 70, namely LLDPE film with a layer thickness of 40 pm as a low-temperature sealing layer 78.
  • a gravure or flexographic printing layer / second inner laminating layer 65 namely polyethylene with an application weight of 20 g/m 2 / second inner blown film 75
  • LLDPE film with a layer thickness of 40 pm / first outer laminating layer 60 namely polyethylene with an application weight of 20 g/m 2 / first outer blown film 70
  • Transparent film 20 namely biaxially oriented polypropylene with a layer thickness of 20 pm / reverse printing layer 30, for example as a gravure or flexographic printing layer / second inner laminating layer 65, namely polyethylene with an application weight of 20 g/m 2 / second inner blown film 75, namely LLDPE film with a layer thickness of 40 pm / first outer laminating layer 60, namely polyethylene with an application weight of 20 g/m 2 / first outer blown film 70, namely LLDPE film with a layer thickness of 40 pm as a low-temperature sealing layer 78.
  • a gravure or flexographic printing layer / second inner laminating layer 65 namely polyethylene with an application weight of 20 g/m 2 / second inner blown film 75
  • LLDPE film with a layer thickness of 40 pm / first outer laminating layer 60 namely polyethylene with an application weight of 20 g/m 2 / first outer blown film 70
  • Transparent film 20 namely machine direction oriented polyethylene with a stretching or orientation ratio of 1 5 and a layer thickness of 20 pm / reverse printing layer 30, for example as a gravure or flexographic printing layer / second inner laminating layer 65, namely polyethylene with an application weight of 20 g/m 2 / second inner blown film 75, namely LLDPE film with a layer thickness of 40 pm / first outer laminating layer 60, namely polyethylene with an application weight of 20 g/m 2 / first outer blown film 70, namely LLDPE film with a layer thickness of 40 pm as a low-temperature sealing layer 78.
  • a gravure or flexographic printing layer / second inner laminating layer 65 namely polyethylene with an application weight of 20 g/m 2 / second inner blown film 75
  • LLDPE film with a layer thickness of 40 pm / first outer laminating layer 60 namely polyethylene with an application weight of 20 g/m 2 / first outer blown film 70
  • Transparent film 20 namely oriented polyethylene terephthalate with a layer thickness of 12 pm / reverse printing layer 30, for example as a gravure or flexographic printing layer / second inner laminating layer 65, namely polyethylene with an application weight of 20 g/m 2 / second inner blown film 75, namely LLDPE film stretched in the machine direction with a stretching or orientation ratio of 1:1.6 and with a layer thickness of 30 pm / first outer laminating layer 60, namely polyethylene with an application weight of 20 g/m 2 / first outer blown film 70, namely LLDPE film with a layer thickness of 40 pm as a low-temperature sealing layer 78.
  • a gravure or flexographic printing layer / second inner laminating layer 65 namely polyethylene with an application weight of 20 g/m 2 / second inner blown film 75, namely LLDPE film stretched in the machine direction with a stretching or orientation ratio of 1:1.6 and with a layer thickness of 30 pm / first outer laminating layer 60,
  • Example 5 with improved water vapor and gas tightness, especially oxygen and carbon dioxide:
  • Transparent film 20 namely polyethylene stretched in the machine direction with a stretching or orientation ratio of 1:5 and a layer thickness of 20 pm / reverse printing layer 30, for example as a gravure or flexographic printing layer / second inner laminating layer 65, namely polyethylene with an application weight of 20 g/m 2 / second inner blown film 75, namely LLDPE film stretched in the machine direction with a stretching or orientation ratio of 1:1.6 and with a layer thickness of 30 pm / first outer laminating layer 60, namely polyethylene with an application weight of 20 g/m 2 / first outer blown film 70, namely LLDPE film with a layer thickness of 40 pm as a low-temperature sealing layer 78.
  • Transparent film 20 namely polyethylene stretched in the machine direction with a stretching or orientation ratio of 1:5 and a layer thickness of 20 pm / reverse printing layer 30, for example as a gravure or flexographic printing layer / second inner laminating layer 65, namely polyethylene with an application weight of 20 g/m 2
  • the water vapor and gas barrier layer of the laminate 10 according to the invention is improved in a highly advantageous manner by using a unidirectionally machine-direction stretched LLDPE film which was stretched with a stretching or orientation ratio of 1:1.6 to a layer thickness of 30 pm.
  • the above examples 3 and 5 represent particularly preferred embodiments according to the invention, since their recyclability is particularly advantageous due to the essentially pure structure of the laminates 10 described.
  • Fig. 5 shows a schematic representation of the laminate 10 according to the invention according to a third embodiment, wherein the laminate 10 according to Fig. 5 essentially corresponds to the laminate 10 according to Fig. 4, with the difference that a metallized barrier layer 80 made of aluminum oxide is introduced between the second inner extrusion lamination layer 65 and the second inner blown film 75, which in turn has a layer thickness in the range of 3 pm to 5 pm.
  • the second inner blown film 75 has a terpolymer layer 120 facing the barrier layer 80, which is, however, not shown in Fig. 5 or in Fig. 4.
  • Fig. 6 and Fig. 7 each show a schematic representation of the laminates 10 according to the invention according to Figs. 4 and 5, wherein their outer layer 15 has a different structure to Figs. 4 and 5.
  • the outer layer 15 according to Fig. 6 and Fig. 7 is not a transparent film that is provided with a print layer 30 in the reverse printing process, as shown in Fig. 4 and Fig. 5, but a non-transparent film 25 that is provided with a print 35 in the frontal printing process.
  • the print 35 is therefore not located adjacent to the second inner extrusion lamination layer 65, but rather on the outermost visible side of the laminate 10 according to the invention.
  • the non-transparent film 25 represents the layer of the laminate 10 according to the invention adjacent to the second inner extrusion lamination layer 65.
  • Both Fig. 8 and Fig. 9 show a detailed view of the second inner blown film 75, which is constructed in six layers according to Fig. 8 and in seven layers according to Fig. 9.
  • the six-layer structure of the second inner blown film 75 according to Fig. 8 consists of a high-density polyethylene layer, ie an HDPE layer 90, a primer layer 100, an adjoining gas barrier layer 110 made of EVOH or polyamide, as well as a further primer layer 100 and a second HDPE layer 90 which in turn adjoins the primer layer 100.
  • Adjacent to the HDPE layer 90 is a low-temperature sealing layer 78 in the form of a thin LLDPE layer.
  • the respective layer thicknesses of the second inner blown film 75 blown in one go are in the range from 4 pm to 20 pm in the case of the HDPE layer 90 and also in the range from 4 pm to 20 pm in the case of the low-temperature sealing layer 78.
  • the remaining layers of the second inner blown film 75 i.e. the primer layer 100, the adjoining gas barrier layer 110, the second primer layer 100 which in turn adjoins the gas barrier layer 110 and the HDPE layer 90 which adjoins the primer layer 100, have a total layer thickness in the range from 32 pm to 100 pm, with the thicknesses of the primer layer being in a range from 0.2 - 2 pm, preferably in a range from 0.3 - 1 pm and particularly preferably in a range from 0.4 - 0.6 pm.
  • the thickness of the gas barrier layer 110 is in the range from 1 pm to 5 pm, preferably in a range from 1.5 pm to 4 pm and particularly preferably in a range from 2 pm to 3 pm.
  • the thickness of the HDPE layer facing the low-temperature sealing layer 78 is then determined from the difference in the total layer thickness, which is in the range from 32 pm to 100 pm, minus the layer thicknesses of the primer layers 100 and the layer thickness of the gas barrier layer 110.
  • the second inner blown film 75 according to Fig. 9 differs from the second inner blown film 75 according to Fig. 8 in that the second inner blown film 75 according to Fig. 9 has an additional terpolymer layer 120 on the outside of the first HDPE layer 90, which faces in the entire composite of the laminate 10 according to the invention in the direction of the outer layer 15, which serves to improve the composite adhesion and was simultaneously integrated into the second inner blown film 75 as the outermost layer 120 in the course of a blowing process together with the aforementioned layers of the second inner blown film 75.
  • the thickness of the terpolymer layer 120 is also in a range from 1 pm to 5 pm according to the invention, preferably in a range of 1.5 pm to 4 pm and particularly preferably in a range of 2 pm to 3 pm.
  • the first outer blown film 70 can be constructed analogously to the second inner blown film 75, but can also have a different structure, for example a single-layer structure and can, for example, consist only of a low-temperature sealing layer 78 comprising LLDPE, wherein the low-temperature sealing layer 78 and thus the entire first outer blown film 70 in this case has a layer thickness in the range of 4 pm to 20 pm.
  • both the first outer blown film 70 and the second inner blown film 75 can have color pigments, for example titanium dioxide, and/or a metallization if, for example, an opaque layer and/or a further barrier layer is to be introduced into the first and/or second blown film 70, 75.

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Abstract

L'invention concerne un stratifié (10), en particulier pour produire un emballage, comprenant une couche externe (15) qui présente éventuellement une conception et comprenant une couche d'étanchéité (50) qui est disposée à l'opposé de la face visible de la couche externe (15), la couche d'étanchéité (50) étant de préférence une couche d'étanchéité à basse température (78), la couche d'étanchéité (50) étant conçue sous la forme d'un premier film soufflé (70) ou sous la forme d'une couche la plus à l'extérieur d'un premier film soufflé (70), et une première couche d'extrusion adhésive (60) étant disposée entre la couche externe (15) et le film soufflé (70). L'invention se rapporte en outre à l'utilisation dudit stratifié (10) et à un emballage produit à partir dudit stratifié (10), en particulier à un emballage de sac tubulaire, de préférence à un emballage de sac tubulaire vertical, et à un procédé de production du stratifié (10).
PCT/EP2023/083632 2022-12-01 2023-11-30 Stratifié, en particulier pour produire un emballage, utilisation du stratifié pour produire un emballage, emballage produit à partir du stratifié, et procédé de production du stratifié WO2024115617A1 (fr)

Applications Claiming Priority (2)

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DE102022131875.3A DE102022131875A1 (de) 2022-12-01 2022-12-01 Laminat, insbesondere zur Herstellung von Verpackungen, Verwendung des Laminats zur Herstellung einer Verpackung sowie aus dem Laminat hergestellte Verpackung und Verfahren zur Herstellung des Laminats
DE102022131875.3 2022-12-01

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WO2024115617A1 true WO2024115617A1 (fr) 2024-06-06

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PCT/EP2023/083633 WO2024115618A1 (fr) 2022-12-01 2023-11-30 Stratifié, en particulier pour produire un emballage, utilisation du stratifié pour produire un emballage, emballage produit à partir du stratifié, et procédé de production du stratifié

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WO2018202479A1 (fr) * 2017-05-05 2018-11-08 Constantia Hueck Folien Gmbh & Co. Kg Stratifié d'emballage recyclable, facilement déchirable, à effet barrière satisfaisant, et son procédé de fabrication
WO2021164913A1 (fr) * 2020-02-18 2021-08-26 Constantia Pirk Gmbh & Co. Kg Emballage en papier recyclable formant une barrière efficace contre la vapeur d'eau et l'oxygène
EP4076944B1 (fr) 2020-02-18 2023-11-01 Constantia Pirk GmbH & Co. KG Emballage en papier recyclable formant une barrière efficace contre la vapeur d'eau et l'oxygène
EP3995307A1 (fr) * 2020-11-05 2022-05-11 Constantia Pirk GmbH & Co. KG Feuille polyéthylène

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