Protective packaging material comprising a vacuum-coated paper layer

Abstract

The invention relates to a packaging layer arrangement (10) for producing a packaging container, the packaging layer arrangement comprising: - a paper layer (12) as a base layer; -an oxygen barrier layer (10) so that an oxygen transfer rate of the packaging layer arrangement (10) is no more than 1.1 cm3 / (m2-d-bar); - a metallisation barrier layer arrangement (22) formed by vacuum deposition, wherein the packaging layer arrangement (10) additionally has a water vapor barrier layer (18) so that a water vapor transfer rate of the packaging layer arrangement (10) is no more than 1.1 g / (m2-d), wherein the oxygen barrier layer (20) is arranged in the layer sequence (LF) between the water vapor barrier layer (18) and the metallisation barrier layer arrangement (22), wherein an exposed outer surface (110a) of the packaging layer arrangement (10) is formed by an outer layer (16) and wherein an exposed inner surface (10a) of the packaging layer arrangement (10) opposite the outer surface (10a) is formed by an inner layer (24). The outer layer (16) comprises a pattern-like adhesion region (26) and a pattern-like neutral region (27), wherein the adhesion region (26) and the neutral region (27) are arranged next to each other.

Description

[0001] 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0002] - 1 -

[0003] Wrapping material with vacuum-coated paper layer

[0004] Description

[0005] The present invention relates to a packaging layer arrangement according to the preamble of claim 1. Such a packaging layer arrangement with both a predetermined minimum barrier effect against the migration of oxygen and against the migration of water vapor is known from DE 10 2021 103 879 A1. The packaging layer arrangement is intended to be suitable for the production of a packaging container in the general sense, i.e., for example, for the formation of a packaging bag. While the use of the packaging layer arrangement known from DE 10 2021 103 879 A1 as wrapping packaging is not excluded, the present packaging layer arrangement is specifically designed for wrapping products to be packaged.

[0006] The packaging layer arrangement can be in place at the beginning of the production of a package as roll material or as at least one sheet, in particular as a stack of sheets, for the production of a package.

[0007] From US 2005 / 0008800 A1, particularly from Figure 3 thereof, a packaging layer arrangement for manufacturing packaging for perishable goods, such as foodstuffs, is known, which has a liquid-tight layer of polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), or copolymers thereof on each of its outer sides. According to US 2005 / 0008800 A1, PE and PP are preferred as layer materials because of their printability.

[0008] The outer layer on what will later be the outside of the packaging formed with the known packaging layer arrangement has a coating weight in the range of 25 to 45 g / m². 2 The outer layer, which will later be the inner surface, has an application weight in the range of 25 to 35 g / m². 2 . 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0009] - 2 -

[0010] Between these outer layers, the known packaging layer arrangement has a paper base layer. The base layer is the layer of the packaging layer arrangement with the highest weight per unit area. The base layer is therefore generally decisive for the stability and stiffness of the packaging layer arrangement. A bonding agent layer, for example again made of PP or PE with a coating weight of 5 g / m², is then applied to the paper layer. 2 up to 20 g / m² 2 The adhesion promoter layer is followed by an additional gas-based binder layer made of, for example, EVOH or PVOH. This additional gas-based binder layer is followed by an aluminum foil layer, forming the main gas-based binder layer. The additional gas-based binder layer is designed to mitigate any binder-reducing effects of cracks or breaks in the aluminum foil.

[0011] A disadvantage of this well-known packaging layer arrangement is its difficult disposal after use. It contains numerous different materials that are not easy to separate. Furthermore, the proportion of aluminum by weight in the packaging layer arrangement is relatively high, which makes its production energy-intensive and therefore expensive.

[0012] WO 97 / 38853 A1 discloses a multilayer flexible packaging film laminate as a packaging layer arrangement, comprising a counterprinted transparent film made of a polyolefin, a polyamide, or a polyester. A primer is applied to the counterprinted layer to provide good adhesion to a gas-based binder layer made of an organic polymer, for example, EVOH, PVOH, or PVDC. A metallization layer, specifically an aluminum layer, is applied to the gas-based binder layer by vacuum deposition. A heat-sealable layer is laminated to the metallization layer using a separate adhesion promoter. A polyurethane-based primer is given as an example of the primer. The gas-based binder layer is extruded or applied as a solution or dispersion and then cured or dried.

[0013] The packaging film laminate known from WO 97 / 38853 A1 has a lower aluminum content than the aforementioned packaging layer arrangement, but is different due to the different plastics used, in particular the 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0014] - 3 - counter-printed transparent film and the heat-sealed layer, difficult to recycle.

[0015] The object of the present invention is to provide a generic packaging layer arrangement mentioned above for use as wrapping packaging.

[0016] The present invention solves this problem by means of a packaging layer arrangement with the features of claim 1.

[0017] The packaging layer arrangement for use as wrapping packaging material, wherein the packaging layer arrangement comprises in a preferred embodiment: a paper layer as a base layer, an oxygen barrier layer, such that an oxygen transfer rate of the packaging layer arrangement is not more than 1.1 cm 3 / (m 2 -d-bar) according to DIN 53380-3, measured at 23 °C and 50 % relative humidity, and a metallization barrier layer arrangement formed by vacuum deposition.

[0018] To protect the packaged product, the packaging layer arrangement additionally includes a water vapor barrier layer such that the water vapor transfer rate of the packaging layer arrangement does not exceed 1.1 g / (m²). 2-d) according to DIN EN ISO 15106-3, measured at 38 °C and 90% relative humidity. To protect it from moisture attack from the consumer and product environments, the oxygen barrier layer is positioned in the layer sequence between the water vapor barrier layer and the metallization barrier layer arrangement. The metallization barrier layer arrangement also exhibits very good barrier properties against water vapor migration.

[0019] An outer surface of the packaging layer arrangement, exposed to the consumer environment, is formed by an outer layer. One of the outer surfaces is 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0020] - 4 - The inner side of the packaging layer arrangement, opposite to the product-side environment, is formed by an inner layer.

[0021] For use as wrapping packaging, the outer layer includes a patterned adhesive area exposed to the surroundings, made of a patterned adhesive material designed to bond to itself or to a region of the inner layer. This allows folds of the wrapping packaging to be secured by an adhesive bond where surface areas of the outer layer come into contact with each other. These adhesions securing the folds are outside-to-outside bonds.

[0022] Similarly, by creating an adhesive bond between the outside and the inside, a finished, folded wrap-around package can be secured against unwanted opening due to any restoring forces inherent in the packaging layer arrangement. For example, a final fold, where a section of the inside faces a section of the outside, can be secured to the previously formed folded packaging body from the inside to the outside.

[0023] The term "adhesive material" generally refers to a material that either already possesses adhesive properties within the packaging layer arrangement or is prepared and activatable to provide an adhesive bond. A common method for activating an adhesive effect is thermal activation, as seen with heat-sealable thermoplastic polymers. These typically seal only against themselves or compatible polymers. The activation of a sealing material should be distinguished from the actual creation of a seal, which is usually achieved through the application of sealing pressure.

[0024] Activation can be achieved additionally or alternatively mechanically, for example by pressure, as is known from pressure-sensitive adhesives. In the case of pressure-sensitive adhesives, activation can be achieved through the sealing pressure, so that activation and sealing coincide. With permanently tacky pressure-sensitive adhesives, activation is effectively achieved by removing a 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0025] - 5 - the protective layer covering the adhesive, in particular a protective film. The protective layer prevents undesired blockage of the permanently adhesive, pressure-sensitive adhesive until a desired seal is formed.

[0026] The pattern of the adhesive material's application depends on the folding chosen for the intended packaging. It is sufficient to apply or provide adhesive material only where it is actually needed. The adhesive area may consist of two or more non-contiguous adhesive sub-areas.

[0027] To prevent local radial build-up of zones within the packaging layer assembly when supplied as a stock roll, the packaging layer assembly features a patterned neutral zone exposed to the surroundings. This neutral zone consists of a patterned filler material that differs from the adhesive material. The filler material is not designed to bond to itself or to any area of ​​the inner layer. The patterned adhesive zone and the patterned neutral zone are arranged adjacent to each other in a direction orthogonal to the thickness direction of the packaging layer assembly. This prevents excessively large local thickness variations within the packaging layer assembly.

[0028] The term "filling material" is used in a very general, function-oriented way to refer to any material that at least partially fills areas of the outer layer free of adhesive and which, according to the intended purpose of the packaging layer arrangement, is not intended to form an adhesive bond with the folded packaging.

[0029] The desired avoidance of a local radial build-up of zones in the packaging layer arrangement during winding can be facilitated or improved by ensuring that exposed surfaces of the patterned adhesion zone and the patterned neutral zone, when the packaging layer arrangement is laid flat, have a distance of less than 5 pm, preferably less than 2 pm, from each other in the thickness direction. The flat state is a reference state in which the packaging layer arrangement is preferably considered in the present application. 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0030] - 6 -

[0031] The aforementioned objective can be achieved even better if the patterned adhesive area and the patterned neutral area form a common flush outer surface.

[0032] Although it is not fundamentally excluded that the outer layer may optionally have a third, or if desired, a fourth material and possibly further materials, each of which differs from the adhesive material and the filler material and forms its own patterned areas of the outer layer, for reasons of its simple manufacture the outer layer preferably consists only of the patterned adhesive area and the patterned neutral area.

[0033] Similarly, gaps can exist between the adhesive layer and the neutral layer, for example, because the adhesive layer and the neutral layer are spaced apart, at least in some areas, in a direction orthogonal to the thickness direction of the packaging layer arrangement. Even with such a patchy application of the outer layer, the neutral layer can provide sufficient support points for each radially outermost turn of the wound packaging layer arrangement to prevent excessive local radial buildup.

[0034] However, a radial structure can best be avoided for a given thickness of the adhesive area and neutral area by arranging the patterned adhesive area and the patterned neutral area complementarily in the outer layer such that where there is adhesive material, there is no filler material, and where there is filler material, there is no adhesive material.

[0035] For conveying consumer information, the particularly easy-to-print paper layer preferably features a layer of printing ink. This is intended to be visible from the consumer's external environment. Both the patterned adhesive area and the patterned neutral area are preferably arranged over the printing ink layer to protect it, such that the printing ink layer is sandwiched between the paper layer on the one hand and the 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0036] - 7 -

[0037] The outer layer, on the other hand, is located there. The filler material can therefore be a pressure varnish.

[0038] To achieve the patterned application, preferably both the adhesive material and the filler material are applied using a printing application process, such as printing rollers.

[0039] The application weight of the adhesive material in the dried state is preferably in the range of 1 to 5 g / m². 2 .

[0040] The adhesive material can be a cold-sealable or a heat-sealable medium. As a heat-sealable medium, it only seals against itself or a compatible polymer. Alternatively, the adhesive material can be a pressure-sensitive adhesive.

[0041] If the adhesive material is a cold sealing medium, it preferably comprises or consists of natural rubber and / or synthetic rubber.

[0042] The inner layer is preferably, but not necessarily, a heat-sealable inner layer. This allows it to be sealed to itself or to a compatible heat-sealable adhesive material, if required. In particular, when the inner layer is heat-sealable, the adhesive material is selected to be compatible with, or even identical to, the sealable material of the inner layer, so that a section of the adhesive area can be sealed to the inner layer from the outside. This allows, for example, the final fold of a wrap-around package to be secured against unwanted retraction.

[0043] In this application, the term "paper" refers to any material that falls under the paper definition of DIN 6730.

[0044] The paper layer can consist of coated paper or uncoated paper with a basis weight in the range of 40 g / m². 2 up to 90 g / m² 2, preferably in the range of 50 g / m² 2 up to 70 g / m² 2 , and with a thickness in the range of 35 pm to 65 pm, preferably in the range of 40 pm to 60 pm. At the thickest point, 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0045] - 8 - preferably the paper layer is made of coated paper or a coating-free paper with a basis weight of 63 g / m² 2 formed with a thickness of 53 pm.

[0046] A paper without a printing coating initially exhibits a greater roughness than coated paper, which is disadvantageous for vacuum vapor deposition or vacuum deposition. However, it does not contain the materials typical of printing coatings.

[0047] The paper may have a mix of longer and shorter fibers that is advantageous for paper recycling. The fiber content of uncoated paper, per unit volume, i.e., its fiber density, and therefore its strength, may be higher than that of coated paper.

[0048] To mitigate the adverse effects of paper surface roughness on vacuum deposition and thus facilitate the deposition of a closed metallization barrier layer from a vacuum, the paper layer can have an acetate-based filler coating on the side facing the metallization barrier layer arrangement. Preferably, the acetate-based filler material comprises or is polyvinyl acetate. An acetate filler coating with a coating weight in the range of 0.9 g / m² 2 up to 1.8 g / m³ 2 , particularly in a range of 1.0 g / m³ 2 up to 1.5 g / m² 2 , is sufficient.

[0049] To improve printability, the paper layer can have a filler coating of ionic and non-ionic starch applied to the side facing away from the metallization barrier layer arrangement. This filler coating has a weight of approximately 0.9 g / m². 2 up to 1.8 g / m³ 2 , particularly in a range of 1.0 g / m³ 2 up to 1.5 g / m² 2 is sufficient here as well.

[0050] The inner layer, which preferably shields the metallization barrier layer arrangement, is preferably predominantly composed of a polyolefin blend, a styrene-acrylic copolymer, or a thermoplastic elastomer. These materials enable the formation of a highly advantageous grease barrier within the packaging layer arrangement, preventing grease migration. 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0051] - 9 - effectively reduced or even largely prevented by the packaging layer arrangement.

[0052] Tests have shown that the packaging layer arrangement with the inner layer made of one of the aforementioned materials achieves a grease barrier with the highest possible KIT value of 12 according to DIN ISO 16532-2.

[0053] In the present application, "predominantly composed of one material" means that the weight fraction of the material in question is the largest weight fraction of all material components. Preferably, the weight fraction of the material in the weight of the entire inner layer is greater than 50%, more preferably greater than 75%, to ensure that the properties of the material in question determine the properties of the inner layer as much as possible. Particularly preferably, the inner layer consists of the material in question.

[0054] The inner layer, predominantly or preferably entirely composed of one of the aforementioned materials, is preferably heat-sealable according to the above disclosure. The heat-sealable inner layer, which is preferably single-layered to achieve a simple manufacturing process for the packaging layer arrangement, but can also be composed of two or more layers, can be bonded to a section of a compatible layer of the same packaging layer arrangement by both heat sealing and a cold sealing medium, due to the materials mentioned for its formation.

[0055] For an inner layer that provides sufficient mechanical and chemical shielding for the metallization barrier layer arrangement, as well as sufficient bond strength in the case of a hot and / or cold sealing connection, and a very good grease barrier with the aforementioned KIT value of 12, an advantageously low application weight of the inner layer in the dried state is sufficient, in the range of 1 to 9 g / m². 2 , preferably in the range of 2 to 4 g / m³ 2 lies. 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0056] - 10 -

[0057] Preferably, the inner layer is applied wet as a dispersion onto a substrate of the packaging layer arrangement. After a drying process, it is dry. Further preferably, to avoid an undesirably high number of layers in the packaging layer arrangement, the inner layer is applied directly onto the metallization barrier layer arrangement, i.e., without an intermediate adhesion promoter layer.

[0058] Contrary to the above, the inner layer can be made of materials other than those mentioned above, such as a biopolymer applied as a solution or dispersion. The biopolymer can be selected from PLA (polylactic acid), PBS (polybutylene succinate), PBAT (polybutylene adipate terephthalate), PBSA (polybutylene succinate adipate), PHA (polyhydroxyalkanoate), PGA (polyglycolic acid), PEF (polyethylene furan dicarboxylate), PVOH, bio-PET, bio-PE, and bio-PP. The aforementioned biopolymers are biodegradable according to DIN 13432. The further developments mentioned in this application, which do not directly relate to an inner layer made of a polyolefin blend, a styrene-acrylic copolymer, or a thermoplastic elastomer, also apply to an inner layer made of one of the aforementioned biopolymers.

[0059] The polyolefin blend preferably comprises LDPE and LLDPE or consists of LDPE and LLDPE. The styrene-based copolymer preferably comprises acrylonitrile butadiene styrene (ABS) and / or acrylonitrile styrene acrylate (ASA) or consists of acrylonitrile butadiene styrene and / or acrylonitrile styrene acrylate.

[0060] The inner layer is closer to the product packaged with the packaging layer arrangement than the paper layer and preferably also closer than the oxygen barrier layer, the metallization barrier layer arrangement, and the water vapor barrier layer. The inner layer, which is predominantly or preferably entirely composed of a polyolefin blend, a styrene-acrylic copolymer, or a thermoplastic elastomer, exhibits an advantageously low coefficient of friction with metallic materials and is therefore particularly suitable for machine operation. (See also 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG)

[0061] - 11 - the inner layer contributes to increasing the water vapor barrier properties of the packaging layer arrangement.

[0062] Preferably, the application weight of the cold sealing medium in the dried state is in the range of 1 to 5 g / m². 2 The cold sealing medium is preferably designed to produce a peelable bond.

[0063] While the inner layer hinders the migration of grease and even certain oils through the packaging layer arrangement, it does not significantly impede the migration of mineral oil and mineral oil-based substances. However, the packaging layer arrangement can advantageously be equipped with a mineral oil barrier by comprising a layer consisting of at least two layers, each of which has a vinyl alcohol-based polymer as its main component. The vinyl alcohol-based polymer can comprise or be polyvinyl alcohol (PVOH), ethylene vinyl alcohol copolymer (EVOH), or butenediol vinyl alcohol copolymer (BVOH).Since the existing oxygen barrier layer can be effectively formed with vinyl alcohol as its main component, the packaging layer arrangement can be equipped with a particularly effective mineral oil barrier without an additional layer by forming the existing oxygen barrier layer from at least two layers, each containing a vinyl alcohol-based polymer as its main component. Preferably, at least one layer consists of a vinyl alcohol-based polymer. Of the vinyl alcohol-based polymers mentioned, PVOH is preferred.

[0064] A mineral oil barrier can be achieved by means of at least a two-layer coating with a polymer based on a vinyl alcohol as the main component, in particular a PVOH coating, with a penetration of less than 1% in a test period of 12.2 days at a test temperature of 60 °C according to SVI test guideline 2015.01.

[0065] The paper layer as a base allows for excellent recyclability. At least the fiber content of the paper layer can be recovered through fiber removal. 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0066] - 12 - and can be converted back into pulp and processed into a fiber material. It is therefore particularly sustainable.

[0067] The remaining structure, including any partially differing structure, of the packaging layer arrangement discussed here is explained below:

[0068] The formation of the metallization barrier layer arrangement by vacuum deposition allows the formation of a particularly thin metallization barrier layer arrangement, the thickness of which can be adjusted particularly precisely by the vacuum deposition process.

[0069] The oxygen barrier layer functionally complements the gas barrier effect of the metallization barrier layer arrangement. The metallization barrier layer arrangement primarily forms a barrier against water vapor, so the additional oxygen barrier layer, in combination with the metallization barrier layer arrangement, provides a comprehensive barrier against the migration of both oxygen and water vapor through the packaging layer arrangement. The packaging layer arrangement is therefore suitable for packaging sensitive, perishable products.

[0070] A preferred direct deposition of the metallization barrier layer arrangement onto the oxygen barrier layer prevents oxygen from undesirably overcoming the metallization barrier layer arrangement locally, for example at a defect in the metallization barrier layer arrangement, and from spreading in a material layer after migration through the metallization barrier layer arrangement.

[0071] The additional formation and arrangement of a water vapor barrier layer further increases the barrier effect of the metallization barrier layer arrangement, which also primarily acts as a water vapor barrier. This allows the metallization barrier layer arrangement to be made as thin as possible without compromising the overall barrier effect of the packaging layer arrangement. The placement of the oxygen barrier layer in the layer sequence between the water vapor barrier layer and the metallization barrier layer arrangement protects the oxygen. 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0072] - 13 - barrier layer, which, depending on the materials used in its construction, may be moisture-sensitive and preferably is indeed moisture-sensitive. The arrangement of the oxygen barrier layer between the water vapor barrier layer and the metallization barrier layer arrangement keeps moisture away from the oxygen barrier layer on both sides, so that the oxygen barrier layer is and remains stable and can exert its effect over a long period of time.

[0073] Vacuum deposition of the metallization barrier layer arrangement allows for a thin and therefore low-mass design of the metallization barrier layer arrangement, thus advantageously minimizing the proportion of non-fiber impurities that would otherwise be generated during the recycling of the packaging layer arrangement in addition to the fiber material originating from the paper layer. This, in turn, facilitates recycling, as the recovery of the fiber material from the paper layer is minimally affected and disrupted by non-fiber impurities.

[0074] Although it is theoretically conceivable that the paper layer is located between the oxygen barrier layer and the metallization barrier layer arrangement, in order to achieve the thinnest possible packaging layer arrangement with a stable, continuous and closed metallization barrier layer arrangement, the metallization barrier layer arrangement is preferably deposited directly onto the oxygen barrier layer.

[0075] According to a first embodiment, the metallization barrier layer arrangement can comprise or consist of a metal layer formed by vacuum deposition from a metallic material. The metallic material is preferably metallic aluminum, which has proven effective as a barrier material in packaging technology.

[0076] According to a second embodiment, the metallization barrier layer arrangement can have or consist of a metal oxide layer formed by vacuum deposition. Particularly the case where the metallization barrier layer arrangement has at least one metal oxide layer but no metal layer, 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0077] - 14 - increases the practical recyclability of the packaging layer arrangement: a metal layer that is immediately recognizable due to its shine often leads consumers to dispose of unwanted packaging not in the paper recycling bin, where packaging made from the packaging layer arrangement described here should be sent for a suitable paper recycling process after use. An essentially transparent metal oxide layer is not recognizable, or less recognizable, to the consumer and allows the paper layer to be identified as the base layer of the packaging layer arrangement. As a result, the consumer correctly perceives the packaging as paper packaging and disposes of it accordingly, which in turn ensures its successful recycling.

[0078] According to a third possible embodiment, the metallization barrier layer arrangement can comprise both a metal oxide layer formed by vacuum deposition and a metal layer formed by vacuum deposition from a metallic material. When the metallization barrier layer arrangement comprises both a metal layer and a metal oxide layer, the metal oxide is preferably an oxide of the metal of the metal layer to facilitate the fabrication of the metallization barrier layer arrangement. Preferably, the metal oxide layer, regardless of whether it is the sole layer of the metallization barrier layer arrangement or formed together with a metal layer, is an aluminum oxide layer.

[0079] Although it may be possible to design the metallization barrier layer arrangement with exactly one metal layer and exactly one metal oxide layer, in order to achieve a metallization barrier layer arrangement with a particularly high barrier effect while simultaneously minimizing the thickness of the barrier layer arrangement, it is preferred that the metallization barrier layer arrangement has a metal layer between two metal oxide layers or consists of a metal layer between two metal oxide layers.

[0080] The term "metallization barrier layer arrangement" is to be understood, as explained above, as a metal-based barrier layer arrangement based on a metal or a metal compound, in particular a metal oxide. 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0081] - 15 -

[0082] Preferably, the metallization barrier layer arrangement is between 6 and 50 nm thick. A metallization barrier layer arrangement in the single-digit nanometer range or in the low double-digit nanometer range can be achieved with a pure metal oxide layer. Preferably, the metallization barrier layer arrangement has a thickness in the range of 30 to 50 nm, wherein, if the metallization barrier layer arrangement includes a metal oxide layer, the metal oxide layer preferably has a thickness of 2.5 to 5 nm. If the metallization barrier layer arrangement has more than one metal oxide layer, each metal oxide layer preferably has a thickness in the range of 2.5 to 5 nm.

[0083] Expressed in optical density, the metallization barrier layer arrangement preferably has a value in the range of 2.0 to 4.0, more preferably in the range of 2.2 to 2.8, and particularly preferably 2.5. These values ​​apply to a metallization barrier layer arrangement with one metallic layer. A metallization barrier layer arrangement with only one metal oxide layer or several metal oxide layers generally has an optical density of no more than 0.1.

[0084] Although the oxygen barrier layer can be made of polyurethane or polyvinylidene chloride, which is particularly stable and durable, it is preferable for the oxygen barrier layer to be water-soluble in order to improve the recyclability of the packaging layer assembly. The water-soluble oxygen barrier layer can be dissolved by wetting it with water and thus removed from the rest of the packaging layer assembly, especially from the paper layer. Advantageously, dissolving the oxygen barrier layer also removes at least one layer located on the side of the oxygen barrier layer facing away from the paper layer, such as the metallization barrier layer assembly. As a result, the proportion of non-fiber-containing foreign material during the recycling of the paper layer can be further reduced.

[0085] Polyurethane or polyvinylidene chloride can be the main component of the oxygen barrier layer by weight, or even, neglecting unavoidable impurities, the sole component. To be water-soluble, the oxygen barrier layer can be formulated according to 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0086] - 16 - the weight, containing vinyl alcohol as the main component or, neglecting unavoidable impurities, consisting of vinyl alcohol. Examples of suitable vinyl alcohols include polyvinyl alcohol, butenediol-vinyl alcohol copolymer, and ethylene-vinyl alcohol copolymer. For the aforementioned reasons of forming an advantageous mineral oil barrier, the oxygen barrier layer is preferably formed from at least two layers, and, to avoid unnecessary material consumption, particularly preferably from exactly two layers.

[0087] The oxygen barrier effect, expressed as the oxygen transfer rate of the packaging layer arrangement, is determined according to DIN 53380-3 at 23 °C and 50% relative humidity. The oxygen transfer rate mentioned above is a minimum requirement for the oxygen barrier layer and, as such, an upper limit. Preferably, the packaging layer arrangement has an oxygen transfer rate of no more than 1.0 cm³, and more preferably no more than 0.8 cm³. 3 / (m 2 d bar) to prevent or delay oxidation of a product surrounded by the packaging layer arrangement for as long as possible.

[0088] To further reduce the thickness of the packaging layer arrangement, the oxygen barrier layer is preferably applied as a primer coating, preferably as a dispersion or solution. The oxygen barrier layer can be applied by extrusion, printing, or roller application. In any case, the oxygen barrier layer is preferably applied wet and then dried after application. In the preferred case of an oxygen barrier layer consisting of at least two layers, each with a vinyl alcohol-based polymer as a main component, particularly with at least two PVOH layers, preferably one layer is applied first, followed by another layer, and so on.

[0089] The oxygen barrier layer preferably has a coating weight of 0.9 to 5.5 g / m² when measured in the dried, ready-to-use state. 2 on. 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0090] - 17 -

[0091] The water vapor barrier layer may contain an acrylic copolymer or a polyester as its main component, or may, neglecting unavoidable impurities, consist of an acrylic copolymer or a polyester.

[0092] The water vapor barrier layer is also applied as a primer coating to achieve the thinnest possible structure, preferably as a dispersion or solution. The water vapor barrier layer can be applied by extrusion, printing, or roller application. It is preferably applied wet and then dried.

[0093] The water vapor barrier layer preferably has an application weight of 0.9 to 3.3 g / m² when measured in the dried, ready-to-use state. 2In one embodiment, the water vapor barrier layer is applied directly to the paper layer, without an intermediate layer. In another embodiment, the water vapor barrier layer is applied to the paper layer with the aforementioned acetate-based filler layer as an intermediate layer.

[0094] The water vapor barrier effect, expressed as the water vapor transfer rate of the packaging layer arrangement, is determined according to DIN EN ISO 15106-3 at 38 °C and 90% relative humidity. The aforementioned water vapor transfer rate is a minimum requirement for the water vapor barrier layer and, as such, an upper limit for the water vapor transfer rate. Preferably, the packaging layer arrangement has a water vapor transfer rate of no more than 1.0 g / (m²), more preferably no more than 0.8 g / (m²). 2-d) to prevent or delay, for as long as possible, the moistening of a product surrounded by the packaging layer arrangement.

[0095] According to a first embodiment of the packaging layer arrangement, the water vapor barrier layer, the oxygen barrier layer, and the metallization barrier layer arrangement can be arranged on the same side of the paper layer. In this case, the water vapor barrier layer is preferably arranged closest to the paper layer of the aforementioned barrier layers. The oxygen barrier layer can be applied directly to the water vapor barrier layer, and the metallization barrier layer can be arranged on the same side of the paper layer. 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0096] - 18 - The barrier layer arrangement can be vacuum-deposited onto the oxygen barrier layer. This results in a very compact layer structure, in which the oxygen barrier layer in particular is virtually inaccessible to moisture from the surrounding atmosphere.

[0097] Alternatively, the paper layer can be positioned between the water vapor barrier layer and the oxygen barrier layer, which can result in a beneficially small number of layers in the packaging arrangement. This is explained below.

[0098] In principle, the packaging layer arrangement can only consist of the layers mentioned above. However, the arrangement of further layers is not excluded.

[0099] Once the paper layer is printed, the neutral layer can be formed from the material of the water vapor barrier layer, thus not only protecting the printed layer from external influences but also locally increasing the water vapor barrier of the packaging layer assembly. The neutral layer can generally be made of nitrocellulose, polyurethane, polyester, and / or an acrylic copolymer, to name just a few examples. The neutral layer can then have a measured coating weight of approximately 0.4 g / m² in the dry, ready-to-use state. 2 up to 2.2 g / m³ 2 exhibit.

[0100] The packaging layer arrangement can include a second water vapor barrier layer, which can be designed and applied in accordance with the first water vapor barrier layer as described above. The second water vapor barrier layer is preferably arranged on the side of the metallization barrier layer arrangement facing away from the paper layer. For the sake of the most effective yet thin water vapor barrier possible, the second water vapor barrier layer, if included, can preferably be applied directly to the metallization barrier layer arrangement. The inner layer can then be applied to this, optionally with an intermediate layer of suitable adhesion promoter. 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0101] - 19 -

[0102] To achieve the thinnest possible yet effective packaging layer arrangement, it can only consist of the layers mentioned above.

[0103] For good recyclability, a particularly dominant proportion of paper material by mass or weight and a proportion of impurities that is as low as possible relative to this dominant proportion are advantageous. For this reason, preferably no single layer of the packaging layer assembly has a higher basis weight than the paper layer. In the particularly preferred embodiment of a water-soluble oxygen barrier layer, according to which all subsequent layers following the oxygen barrier layer in the direction away from the paper layer can be easily removed from the packaging layer assembly, the paper layer can have a proportion of at least 95 wt.% of the total weight of the partial layer assembly, at least in a partial layer assembly extending from an outer surface of the packaging layer assembly located closer to the paper layer than to the metallization barrier layer assembly up to and including the metallization barrier layer assembly.Preferably, the paper layer comprises at least 95% by weight of the total weight of the packaging layer assembly. In many regulations concerning packaging recycling, this 95% by weight threshold defines the limit below which a multi-layered packaging assembly is considered a single-material product and may be treated as such in secondary raw material recycling. The packaging layer assembly is then considered to consist solely of the material with a weight fraction of at least 95% and is processed according to a recycling process adapted for this material. In this case, this material is preferably the paper of the paper layer.

[0104] Different jurisdictions may have different thresholds for classifying a packaging material as a mono-material. Currently, the 95% wt. criterion is the strictest, and therefore meeting this criterion fulfills the requirement for classification as a mono-material in most or even all jurisdictions. 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0105] - 20 - References to standards and regulations specified in this application refer to the standards and regulations in the version applicable on the filing date.

[0106] The present invention also relates to a flexible packaging, in particular food packaging, formed from the packaging layer arrangement described above. The flexible packaging comprises a packaging wall and a packaging space surrounded by the packaging wall. The packaging wall is formed at least partially, preferably predominantly, and particularly preferably completely, from a packaging layer arrangement as described and further developed above.

[0107] The packaging, as a wrap-around packaging, has at least one adhesive area in which a section of the outer layer of the packaging layer arrangement is bonded to another section of the outer layer and, if desired, to a compatible section of the inner layer.

[0108] The present invention is explained in more detail below with reference to the accompanying drawings. It illustrates:

[0109] Fig. 1 shows a rough schematic cross-sectional view of a first embodiment of a packaging layer arrangement according to the invention.

[0110] Fig. 2 shows a rough schematic cross-sectional view of a second embodiment of a packaging layer arrangement according to the invention, and

[0111] Fig. 3 shows a rough schematic perspective view of a package formed with the packaging layer arrangement of Fig. 1.

[0112] Figure 1 shows a first embodiment of a packaging layer arrangement according to the invention of the present application in a broad cross-sectional view and is designated 10. In the first embodiment, the packaging layer arrangement 10 has a paper layer 12, the basis weight of which is preferably 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0113] - 21 - is not exceeded in amount by any other layer of the packaging layer arrangement 10. The paper layer 12 forms the base layer of the packaging layer arrangement 10. In the present embodiment, the paper layer 12 is made of a coating-free paper with a basis weight of 63 g / m². 2 and formed with a thickness of 53 pm. However, paper layer 12 could just as well be made of coated paper.

[0114] To smooth the surfaces of the unprinted paper layer 12, a first filler coating 13 of ionic and non-ionic starch with a coating weight of, for example, 1.2 g / m² is applied to a side 12a of the paper layer 12 facing the outside 10a of the packaging layer arrangement 10, in the sense of an outside 10a of a wrapping package 90 formed from the packaging layer arrangement 10 (see Figure 3). 2 applied.

[0115] Similarly, on the side 12b of the paper layer 12 facing away from the outside 10a of the packaging layer arrangement 10, a second filler coating 17 made of polyvinyl acetate with a coating weight of, for example, 1.3 g / m² is applied to smooth it. 2 applied.

[0116] The representation of the packaging layer arrangement 10 in Figure 1 is expressly not to scale, especially with regard to the representation of the thicknesses of the individual layers.

[0117] On the outer side 10a of the packaging layer arrangement 10, the packaging layer arrangement 10, in the illustrated embodiment, has a layer 14 with a printing ink layer printed directly onto the paper layer 12 or onto the filler layer 13. The printing ink layer 14 allows the packaging layer arrangement 10, and thus the packaging 90 formed from it, to be provided with product information about the origin and / or quality and / or quantity of a product packaged with the packaging layer arrangement 10. 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0118] - 22 -

[0119] An outer layer 16 is arranged on the side of the printing ink application layer 14 that faces away from the paper layer 12. The outer layer 16 preferably covers the printing ink application layer 14 completely.

[0120] The outer layer 16 comprises an adhesive area 26 made of an adhesive material. The adhesive area 26, which in the illustrated embodiment has several non-contiguous adhesive sub-areas 26-1, 26-2, is applied in a patterned manner. The adhesive area 26 was therefore preferably applied wet in a patterned manner and subsequently dried.

[0121] The portion of the outer layer 16 not formed by the adhesive area 26 is formed by a neutral area 27. The neutral area 27 is complementary to the adhesive area 26 in terms of area. The two areas, adhesive area 26 and neutral area 27, preferably adjoin each other without gaps. The outer surfaces 26a of the adhesive area 16 and 27a of the neutral area 27 are flush with each other and form a common, uniform outer surface 16a of the outer layer 16, exposed to the consumer-side environment V, which is also the outer surface 10 of the packaging layer arrangement 10. This gives the packaging layer arrangement 10 a uniform thickness and allows it to be wound as a supply roll with a uniform winding radius along a winding axis, without requiring local radial build-up.

[0122] The filler material forming the neutral zone 27 can be selected from nitrocellulose, polyurethane, or polyester, to name just a few examples. The filler material is preferably applied wet in a patterned manner and then dried. In its ready-to-use, dried state, its application weight ranges from 0.5 to 2.0 g / m². 2

[0123] The adhesive material can be a heat-sealable material or a cold adhesive or cold-sealing medium.

[0124] On the inner side 10b of the packaging layer arrangement 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG, which is exposed to the outer side 10a and to the later product-side environment P.

[0125] - 23 -

[0126] On page 12b of the paper layer 12, which refers to the filler application 17, a water vapor barrier layer 18 is applied. The water vapor barrier layer 18 can, for example, be made of an acrylic copolymer or a polyester, for example with an application weight of 1 to 3 g / m². 2 , again measured in the ready-to-use, dried state.

[0127] The water vapor barrier layer 18 is preferably applied wet and is dried after application.

[0128] An oxygen barrier layer 20 is wet-applied to the side of the water vapor barrier layer 18 facing away from the paper layer 12, and then dried. The oxygen barrier layer 20, for example made of water-soluble PVOH, has a coating weight of 2 to 5 g / m² in its ready-to-use, dried state. 2 on.

[0129] The oxygen barrier layer 20 can also be made of other materials, such as polyurethane, BVOH, or EVOH. It is preferably made of water-soluble PVOH so that the oxygen barrier layer 20 and all subsequent layers extending away from the paper layer 12 can be easily removed from the paper layer 12 by dissolving the oxygen barrier layer 20.

[0130] Furthermore, a particularly effective mineral oil barrier can be provided with PVOH if the PVOH layer has at least two separately applied layers, since the subsequently applied layer 20b can then seal defects such as cracks or penetrations in the first applied layer 20a. To achieve the advantageous mineral oil barrier, the oxygen barrier layer 20 is formed by the individual PVOH layers 20a and 20b.

[0131] A metallization barrier layer arrangement 22 is applied to the side of the oxygen barrier layer 20 facing away from the paper layer 12 and the water vapor barrier layer 18 by vacuum deposition. The metallization barrier layer arrangement 22 has an optical density of between 2.0 and 68600p. WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0132] - 24 -

[0133] 4.0, preferably between 2.2 and 2.8, particularly preferably from 2.5 upwards. Their thickness in the illustrated example is approximately 40 nm.

[0134] With the arrangement shown, the moisture-sensitive oxygen barrier layer 20 lies in the direction of a layer sequence LF parallel to the thickness direction D of the packaging layer arrangement 10 between the layers 18 and 22, which act as a water vapor barrier. Therefore, the oxygen barrier layer 20 can remain stable for a long time, shielded on both sides from attacking moisture, and exert its effect as an oxygen barrier.

[0135] The magnified view shown in Figure 1 depicts the metallization barrier layer arrangement 22 in detail. In the preferred embodiment shown, this arrangement comprises a central, thicker metal layer 22a made of metallic aluminum, which is located between two thinner metal oxide layers 22b and 22c made of aluminum oxide. The two metal oxide layers 22b and 22c are not naturally occurring but were intentionally produced by vacuum deposition. Each of the two metal oxide layers 22b and 22c has a thickness of approximately 3 to 4 nm, preferably 3.5 nm, so that the intervening metal layer 22a has a thickness of approximately 32 to 34 nm, preferably 33 nm.

[0136] The metal layer 22a and the metal oxide layers 22b and 22c flanking it on both sides exhibit excellent water vapor barrier properties at the indicated low thickness. Furthermore, the two metal oxide layers 22b and 22c protect the metal layer 22a located between them from oxidizing attack by the surrounding atmosphere.

[0137] On the side of the metallization barrier layer arrangement 22 facing away from the paper layer 12, a heat-sealable inner layer 24 is applied, for example by extrusion. This ensures that the packaging layer arrangement 10 is sealable, and in particular heat-sealable, at least on its inner side 10b facing the product-side environment P. The inner layer 24 is made of a blend of LDPE and LLDPE, or of a copolymer based on styrene and acrylic, such as ABS or ASA, or of a thermoplastic elastomer. 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0138] - 25 -

[0139] The application weight of the inner layer 24, measured in the ready-to-use dried state, is preferably between 2 and 10 g / m². 2 Instead of the aforementioned polymer types, one of the materials mentioned in the introductory description can be used as the inner layer 24. When using a biopolymer as the inner layer, its coating weight, measured in the dry, ready-to-use state, is 5.0 to 30.0 g / m². 2 .

[0140] Then, if at least in sections an adhesive bond of the bonding area 26 of the outer layer 16 is desired, the same material can be chosen as the adhesive material which forms the heat-sealable material of the inner layer 24.

[0141] The inner layer 24 provides a barrier effect of the packaging layer arrangement 10 against migration of grease.

[0142] The inner layer 24 is preferably applied as a dispersion by roller application or by another printing application method over the entire surface, optionally with an intermediate adhesion promoter layer.

[0143] The inner layer 24 preferably has a completely exposed surface 24b without any further coating.

[0144] The adhesive layer 26 can also be a cold-sealable medium application, which, preferably as a dispersion, is applied only locally to the ink layer 14. The cold-sealable medium of the adhesive layer 26 and the heat-sealable material of the inner layer 24 are then at least compatible with each other. For this purpose, the inner layer can be mildly corona-treated on its surface 24b, preferably with a treatment power of no more than 3500 W. This ensures a good and durable bond between the cold-sealable medium of the adhesive layer 26 and the inner layer 24 when the cold-sealable medium of the adhesive layer 26 makes direct contact with the inner layer 24 without the need for an intermediate adhesion promoter layer. 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0145] - 26 - In Figure 2, identical and functionally equivalent components and component sections as in Figure 1 are provided with the same reference numerals, but increased by the number 100. The second embodiment shown in Figure 2 is described below only insofar as it differs from the first embodiment of a packaging layer arrangement shown in Figure 1, to whose description reference is expressly made for the explanation of the second embodiment.

[0146] In the second embodiment of Figure 2, the neutral zone 127 of the outer layer 116 is formed by a material of the water vapor barrier layer 18 of the embodiment of Figure 1. The moisture-sensitive oxygen barrier layer 120 is thus also located in the second embodiment, in the direction of the layer sequence LF, between a water vapor barrier layer 118 formed by the neutral zone and the metallization barrier layer arrangement 122, so that the oxygen barrier layer 120 is also shielded against attack by moisture on both sides in the second embodiment.

[0147] Optionally, the packaging layer arrangement 110 – or the packaging layer arrangement 10 of the first embodiment – ​​can have a second water vapor barrier layer 125, which is preferably applied directly onto the metallization barrier layer arrangement 122 to enhance its barrier effect against water vapor migration. The second water vapor barrier layer 125, which essentially corresponds to the water vapor barrier layer 118 with respect to the type of application, its material, and its thickness, is therefore, if provided, preferably arranged between the metallization barrier layer arrangement 122 and the inner layer 124.

[0148] As in the first embodiment, the inner layer 124 can also be applied directly to the metallization barrier layer arrangement 122, deviating from the illustration in Fig. 2.

[0149] In both embodiments, the oxygen barrier layer 20 or 120 is water-soluble. The oxygen barrier layer 20 or 120 is shielded on both sides by the water vapor barrier layer 18 or 118 and the metallization- 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0150] - 27 - The sensitivity to moisture of the oxygen barrier layer arrangement 22 or 122 does not impair its stability. In a recycling process, the layers 18, 118, 22, 122, which act as a barrier against water vapor, cannot withstand a massive attack by liquid water, so that the oxygen barrier layer 20 or 120 can be dissolved during recycling of the packaging layer arrangement 10 or 110. This allows all layers located on the side of the oxygen barrier layer 20 or 120 facing away from the paper layer 12 or 112 to be easily removed from the paper layer 12 or 112 and withdrawn from the recycling process focused on the paper layer. This significantly increases the recycling success of the packaging layer arrangement 10 or 110.

[0151] Preferably, the proportion of the weight of the paper layer 12 or 112 to the total weight of a partial layer assembly 30 or 130, extending from the outer surface 10a or 110a of the packaging layer arrangement 10 or 110 up to and including the metallization barrier layer arrangement 20 or 120, is at least 95%. Particularly preferably, the proportion of the weight of the paper layer 12 or 112 to the total weight of the packaging layer arrangement 10 or 110 is at least 95%. This allows the partial layer assembly 30 or 130, or even the entire packaging layer arrangement 10 or 110, to be classified and recycled as a single material.

[0152] Figure 3 shows an example of a wrapping package 90, which is formed from a packaging layer arrangement according to the invention.

[0153] The wrapping package 90 shown in Figure 3 can package a cuboid product, such as molded sugar, butter or instant broth extract, to name just a few examples.

[0154] An originally rectangular blank was folded according to a folding pattern predetermined for the product to be packaged.

[0155] The wrapping packaging 90 has its outer surface 10a or 110a facing the consumer environment V exclusively. 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG

[0156] - 28 -

[0157] The adhesive area 26 is located where, due to the folding pattern, sections of the outer layer 16 of the finished wrapping package 90 come into contact with each other. The adhesive effect of the adhesive material can be activated after folding the wrapping package, for example thermally, thereby fixing the wrapping package 90 in its formed shape. The actual seal is created after thermal activation of the adhesive material with the additional application of sealing pressure.

[0158] In a dashed area 92 in Figure 3, a region of the inner layer 24 rests on a region of the outer layer 16 of the same blank that lies below it, closer to the product. Here, the inner layer 24 can be locally sealed to a section of the adhesive area 26 to secure the final fold.

Claims

68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG - 29 - Claims 1. Packaging layer arrangement (10; 110) for use as wrapping packaging material, wherein the packaging layer arrangement (10; 110) comprises: a paper layer (12; 112) as a base layer, an oxygen barrier layer (20; 120), such that the oxygen transfer rate of the packaging layer arrangement (10; 110) does not exceed 1.1 cm 3 / (m 2 -d-bar) according to DIN 53380-3, measured at 23 °C and 50% relative humidity, and a metallization barrier layer arrangement (22; 122) formed by vacuum deposition, wherein the packaging layer arrangement (10; 110) additionally has a water vapor barrier layer (18; 118) such that a water vapor transfer rate of the packaging layer arrangement (10; 110) does not exceed 1.1 g / (m²). 2-d) according to DIN EN ISO 15106-3, measured at 38 °C and 90% relative humidity, wherein the oxygen barrier layer (20; 120) is arranged in the layer sequence (LF) between the water vapor barrier layer (18; 118) and the metallization barrier layer arrangement (22; 122), wherein an outer surface (10a; 110a) exposed to the environment of the packaging layer arrangement (10; 110) is formed by an outer layer (16; 116) and wherein an inner surface (10a; 110a) of the packaging layer arrangement (10; 110) opposite the outer surface (10a; 110a) exposed to the environment is formed by an inner layer (24; 124), characterized in that the outer layer (16; 116) comprises: an exposed patterned adhesion area (26; 126) consisting of a patterned adhesive material designed to bond to itself or to bond to an area of ​​the inner layer (24; 124) and a patterned neutral area exposed to the surroundings (27; 127) from a patterned filler material different from the adhesive material, which is designed neither to bond with itself nor to bond with any area of ​​the inner layer (24; 124). 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG - 30 - wherein the patterned adhesion area (26; 126) and the patterned neutral area (27; 127) are arranged next to each other in a direction orthogonal to the thickness direction (D) of the packaging layer arrangement (10; 110).

2. Packaging layer arrangement (10; 110) according to claim 1 , characterized in that exposed surfaces (26a, 27a; 126a, 127a) of the pattern-like adhesion area (26; 126) and of the pattern-like neutral area (27; 127) have a distance of less than 5 pm from each other in the thickness direction (D) when the packaging layer arrangement (10; 110) is laid flat.

3. Packaging layer arrangement (10; 110) according to claim 2, characterized in that the patterned adhesive area (26; 126) and the patterned neutral area (27; 127) form a common flush outer surface.

4. Packaging layer arrangement (10; 110) according to one of the preceding claims, characterized in that the outer layer (16; 116) consists only of the pattern-like adhesive area (26; 126) and the pattern-like neutral area (27; 127).

5. Packaging layer arrangement (10; 110) according to claim 4, characterized in that the patterned adhesive area (26; 126) and the patterned neutral area (27; 127) are arranged complementarily in the outer layer (16; 116) such that where there is adhesive material, there is no filler material, and where there is filler material, there is no adhesive material.

6. Packaging layer arrangement (10; 110) according to one of the preceding claims, characterized in that the paper layer (12; 112) has a printing ink application (14; 114), wherein both the patterned adhesive area (26; 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG - 31 - 126) as well as the pattern-like neutral area (27; 127) are arranged above the printing ink application (14; 114) in such a way that the printing ink application (14; 114) is located between the paper layer (12; 112) on the one hand and the outer layer (16; 116) on the other.

7. Packaging layer arrangement (10; 110) according to claim 6, characterized in that the filling material is an overprint varnish.

8. Packaging layer arrangement (10; 110) according to one of the preceding claims, characterized in that the application weight of the adhesive material in the dried state is in a range of 1 to 5 g / m² 2 lies.

9. Packaging layer arrangement (10; 110) according to one of the preceding claims, characterized in that the adhesive material is a cold sealing medium or a heat sealing medium.

10. Packaging layer arrangement (10; 110) according to claim 9, characterized in that the adhesive material is a cold sealing medium comprising or consisting of natural rubber and / or synthetic rubber.

11. Packaging layer arrangement (10; 110) according to one of the preceding claims, characterized in that the inner layer (24; 124) is a heat-sealable inner layer (24; 124).

12. Packaging layer arrangement (10; 110) according to one of claims 8 to 11, characterized in that the coating weight of the inner layer (24; 124) in the dried state is in the range of 1 to 9 g / m² 2 lies. 68600P WO Huhtamaki Flexible Packaging Germany GmbH & Co. KG - 32 - 13. Packaging layer arrangement (10; 110) according to one of the preceding claims, including claim 11, characterized in that the inner layer (10; 110) is predominantly formed from a polyolefin blend or from a copolymer based on styrene and acrylic or from a thermoplastic elastomer.

14. Packaging layer arrangement (10; 110) according to claim 13, characterized in that the polyolefin blend comprises LDPE and LLDPE or consists of LDPE and LLDPE and / or that the styrene and acrylic-based copolymer comprises acrylonitrile butadiene styrene or / and acrylonitrile styrene acrylate or consists of acrylonitrile butadiene styrene acrylate.

15. Packaging layer arrangement (10; 110) according to one of the preceding claims, characterized in that the oxygen barrier layer (20; 120) is formed from at least two layers (20a, 20b; 120a, 120b), each of which contains a polymer based on vinyl alcohol as the main component.

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