EP3945155B1 - Structure en couches à aptitude améliorée au recyclage - Google Patents

Structure en couches à aptitude améliorée au recyclage

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Publication number
EP3945155B1
EP3945155B1 EP21188572.8A EP21188572A EP3945155B1 EP 3945155 B1 EP3945155 B1 EP 3945155B1 EP 21188572 A EP21188572 A EP 21188572A EP 3945155 B1 EP3945155 B1 EP 3945155B1
Authority
EP
European Patent Office
Prior art keywords
layer
stratum
application
paper
release
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP21188572.8A
Other languages
German (de)
English (en)
Other versions
EP3945155A1 (fr
Inventor
Daniel DREXLER
Thomas Klaus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huhtamaki Flexible Packaging Germany GmbH and Co KG
Original Assignee
Huhtamaki Flexible Packaging Germany GmbH and 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 and Co KG filed Critical Huhtamaki Flexible Packaging Germany GmbH and Co KG
Publication of EP3945155A1 publication Critical patent/EP3945155A1/fr
Application granted granted Critical
Publication of EP3945155B1 publication Critical patent/EP3945155B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/001—Release paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/82—Paper comprising more than one coating superposed

Definitions

  • the present invention relates to a layered structure comprising an adhesive layer, a paper layer, and a release layer between the adhesive layer and the paper layer, wherein the adhesive layer contacts the release layer.
  • the planar layered structure of the present invention is defined in claim 1.
  • a layer structure within the meaning of the present application is a layer composite which comprises the layers and layers attributed to it in the present application or consists of these layers.
  • Such layered structures can be applied to any surface, depending on the design of the adhesive layer.
  • a preferred area of application is in the packaging industry, where such layered structures are applied to packaging as labels.
  • packaging can provide a relatively uniform outer surface in terms of surface properties and surface material for the application of the layered structure. This allows one type of layered structure to be applied to a variety of packaging to label different packaged goods.
  • the oPP layer serves as a substrate for the paper layer and stabilizes it, preventing unwanted tearing of the paper layer at the applied label. Since the layered structure is often applied to a material web from which packaging is only produced after the layered structure has been applied, the layered structure is This could lead to the formation of stresses in the paper layer. In the prior art, this is prevented by the OPP layer, which reduces stresses induced by the packaging material during packaging production through elastic or plastic deformation and does not transfer them to the paper layer, or only to a reduced extent.
  • a water-based release coating composition for use in combination with a packaging material comprises an intimate mixture of a polyamide resin microdispersion and an antifoam agent.
  • the WO 99/39989 A1 discloses a cold seal package with constructions in which two substrates or two parts of a substrate are sealed together using a contact adhesive that is essentially free of natural latex.
  • the two substrates can be easily peeled from each other without significant damage to the substrates. Furthermore, once separated, the substrates generally cannot be resealed or reattached. The cold seal formed by the adhesive between the substrates is therefore not resealable.
  • Well-known cold seal packaging is particularly suitable for the aseptic delivery of packaged goods such as bandages, dressings and the like.
  • the adhesive layer allows delamination of the printing plate.
  • the EP 0 976 580 A1 discloses a transfer label with a carrier part comprising a substrate provided with a release liner on each side. A transfer part is printed on the substrate and provided with a pressure-sensitive adhesive.
  • the transfer label according to EP 0 976 580 A1 It can be fed from a roll or stack at high speed at relatively low temperatures and allows for precise alignment with relatively simple application equipment at room temperature.
  • the transfer labels can be applied permanently or removable to containers such as crates, glass or plastic bottles, metal beverage cans, and the like.
  • the present invention achieves this object in a layer structure of the type mentioned at the outset in that the separating layer is applied to the paper layer as a release lacquer coating and contacts the paper layer.
  • the previously used OPP layer for stabilization is thus eliminated, and the release layer is applied directly to the paper layer as a release coating.
  • the OPP layer thus eliminates the main obstacle to recycling the layered structure.
  • the layered structure is therefore more sustainable than the state-of-the-art layered structure described above.
  • the release coating layer being a polyamide-based release coating layer.
  • the release coating layer thus consists of more than 50 wt.%, preferably more than 80 wt.%, and particularly preferably more than 95 wt.% polyamide.
  • the reference state is the dry state of the release coating after its application. After evaporation of any solvent present during application, the release coating can consist of 100% polyamide by weight, disregarding unavoidable impurities.
  • the release coating can comprise at least one additive and/or at least one wax or a mixture of different waxes.
  • the release varnish coating layer can be applied particularly thinly in liquid form in one application process and then doctored off. Alternatively, the release varnish coating layer can be applied using a printing process.
  • the advantage of the release varnish coating layer is that it achieves its desired technical effect even at low grammages.
  • the release varnish coating layer is applied to the paper layer with an application weight of at least 1.0 g/m 2 , preferably 1.5 g/m 2 , particularly preferably at least 2 g/m 2 . With an application weight of the release varnish coating layer of 1.5 g/m 2 or more on the paper layer, the inventors have found that the adhesion layer can be separated over the entire surface from the release varnish coating layer, and thus also from the paper layer.
  • this separability allows the adhesion layer to be separated from the paper layer without generating fiber tears in the paper layer.
  • an application weight of the release coating layer of 1.0 g/ m2 to 1.5 g/ m2 on the paper layer, a crack-free separation of the adhesion layer from the paper layer can also be achieved.
  • fiber tears may also occur to a small extent in the paper layer, which are, however, acceptable for certain applications.
  • the paper layer is preferably pre-coated at least on the side where the release coating layer is applied, and furthermore, is particularly smooth.
  • Such a paper layer supports the reduction and/or prevention of fiber tears in the paper layer, which can occur during the above-described separation of the adhesion layer from the release coating layer, or from the paper layer, particularly when using a paper layer that is not pre-coated on the side where the release coating layer is applied and/or is less smooth on this side.
  • the release coating layer must be applied to the paper layer with a coating weight of no more than 5 g/ m2 , preferably no more than 3 g/ m2 .
  • the coating weight of the release coating layer is preferably in the range of 1 to 5% of the basis weight of the paper layer.
  • the application weight of the adhesion layer is preferably greater than that of the release coating layer and smaller than the basis weight of the paper layer.
  • the basis weights given in this application for a layer or layer refer to the dry or cured state of the respective layer or layer.
  • the adhesive force between the release coating layer and the paper layer is greater than between the release coating layer and the adhesion layer.
  • the adhesive force between the release coating layer and the adhesive layer is lower than between the adhesive layer and a packaging material layer to which the layered structure is applied.
  • This provides a type of tamper-evident seal that indicates whether a package provided with the layered structure has been tampered with in the area of the layered structure.
  • the present invention therefore also relates to an arrangement comprising a layer structure described in the present application, which is applied to a packaging material layer. Such arrangements are generally described below.
  • the packaging material layer which may be part of a packaging material layer composite, may be a packaging material layer before or after the production of a package therefrom.
  • the adhesion between those contacting layers is considered to be greater between which a greater force must be applied to separate them when otherwise the same delamination technique is used.
  • the adhesive layer is preferably a heat-sealing layer that can be bonded to a specific substrate by heating it to a specific sealing temperature and pressing it onto the substrate with a specific sealing pressure for a specific sealing time.
  • This substrate is generally a heat-sealing layer made of a material that is compatible with the material of the heat-sealing layer for producing an adhesive bond.
  • the resulting seal seam strength can be adjusted within certain limits in a manner known per se by changing, in particular, the sealing time and/or the sealing pressure.
  • the heat-sealing layer is preferably sealable against any desired materials, in particular paper, PET, PP, PS, overprint varnishes, and the like.
  • the adhesive layer can be a cold-adhesive layer, especially a cold-sealing layer, which generally adheres to any substrate. If the adhesive layer is a cold-adhesive layer, it is usually covered with a release film to prevent unwanted blocking. Silicone-coated paper, for example, can be used as a release film.
  • the adhesion layer can be bonded over its entire surface to the substrate, in particular to a packaging material layer. If easier detachment of the layer structure from its substrate is desired, the adhesion layer can be applied only partially to the release coating layer, leaving certain areas unaffected, to reduce the overall adhesion of the layer structure to the substrate. Areas of the release coating layer and the paper layer left unaffected by the adhesion layer can also serve as information carriers for information that is only intended to be available after the layer structure has been removed from the substrate, for example, after the purchase of a labeled packaging product, as may be the case in a competition.
  • the paper layer preferably has a basis weight of 40 g/m 2 to 120 g/m 2.
  • the paper layer preferably has a basis weight of 70 g/m 2 to 120 g/m 2 , this basis weight being particularly suitable for adhesive labels has proven advantageous for layered structures.
  • the paper layer can have an ink application and/or a protective varnish layer on the side facing away from the release varnish application layer.
  • the ink application is preferably a print ink application, with which information in text and/or image form can be applied to the visible side of the layered structure, which is immediately recognizable to the consumer.
  • a protective varnish layer can protect the print ink application or the ink application in general from abrasion and deterioration.
  • the layered structure preferably comprises only the aforementioned plies and layers. After removing the layered structure from its substrate, which usually leaves the adhesive layer on the substrate, the vast majority of the removed layered structure residue by weight is easily recyclable paper. Any residues of the adhesive layer remaining on the removed layered structure residue can be easily removed over large areas of the layered structure residue.
  • the adhesive layer is designed to adhere to a base material, in particular a packaging material layer.
  • the paper layer may have a visible side, with the release coating layer being applied to a side of the layer structure facing away from the visible side of the paper layer, in particular with respect to a thickness direction of the layer structure.
  • the adhesion layer in particular, is applied flatly to the release coating layer.
  • the layer structure is formed in a flat manner.
  • flat refers to structures and/or layers whose dimensions in the thickness direction are significantly smaller, in particular at least by a factor of 20 to at least 100, than their dimensions orthogonal to the thickness direction.
  • adhesion layer and/or the paper layer and/or the separating layer and/or the release coating layer and/or the print coating and/or the protective coating layer are flat.
  • the layer structure is produced during a single pass of a paper web through an application device with several application stations.
  • the present invention relates to an arrangement, in particular to a packaging, comprising an outer material and a lower material, wherein the layered structure according to the invention is the upper material.
  • the adhesive layer of the layered structure adheres to the lower material, in particular over the entire surface or only in sections.
  • the layered structure can be applied to the base material as the outer material. In particular, the layered structure forms an outer side of the assembly.
  • the base material is preferably formed separately from the layered structure.
  • the base material can be a layer of packaging material and/or a plastic.
  • the base material can form a section of a container, e.g., a cup or a tray.
  • the base material can simply be a container wall onto which the layered structure can be applied as an adhesive label to identify the container.
  • the layered structure can advantageously form an easily and securely opened container closure if the section of the base material is a collar that protrudes from a container wall and extends around a container opening.
  • a collar is, in particular, a circumferential projection that projects in at least one direction orthogonal to the circumferential direction, preferably radially.
  • the collar preferably projects radially outward or radially inward from the container wall without an axial component, and preferably outward to facilitate emptying the cup.
  • the packaging can be a bag, which can be formed entirely from the layered structure. Likewise, only one wall of the bag can be a layered structure, which is sealed against another packaging material layer of the bag, separate from the layered structure and structurally different from it, as the base material.
  • the separate packaging material layer can alternatively be a layered structure according to the invention.
  • the packaging material layer as the base material can also be part of the layered structure itself by folding the layered structure onto itself, then with the adhesion layers facing one another. In this case, a continuous section of the layered structure according to the invention surrounds a cavity of a packaging.
  • the layer structure which is connected to a base material by means of its adhesion layer, can be a layer of the exposed
  • a partial structure extending from the exposed outer side of the layer structure up to and including the release lacquer application layer can be peeled off the base material as a release structure from the layer structure, which is bonded to a base material by means of its adhesion layer.
  • the adhesion layer remains at least partially or preferably completely in the area where it is bonded to the base material.
  • the release structure can be completely detachable from the adhesion layer or only in a detachment area of its surface area designed for this purpose.
  • the layer structure can have a release lacquer application layer only in the detachment area and not in an area different from the detachment area.
  • an area of the base material where exposed cold adhesive remains after the release structure has been detached from the base material can form an adhesive surface.
  • the adhesive surface can preferably completely or partially surround a removal opening of the package, so that the part of the layer structure detached from the base material can form a resealable adhesive closure of the package.
  • the outermost layer of the base material to which a layer structure according to the invention adheres with its adhesion layer is hereinafter referred to as the contact layer.
  • the contact layer can be the adhesion layer of the packaging material layer if this layer is also a layer structure according to the invention.
  • the visible side of the paper layer and/or a print job applied to the visible side of the paper layer and/or a protective lacquer layer applied to the visible side of the paper layer and/or to the print job can be the contact layer.
  • the layered structure may cover an opening in the base material, which may be part of a package, wherein the opening is preferably configured for removing a product from the interior of the package.
  • the layer structure may have a substantially uniform thickness over its entire surface area.
  • the release lacquer coating can be applied in a patterned manner, leaving at least one area of the paper layer free, or alternatively, it can be applied over the entire surface of the paper layer. It can extend over the entire extent of the layer structure in at least one direction of the layer structure that is orthogonal to the thickness direction of the layer structure, from the longitudinal direction and/or the width direction.
  • a partial section of the layer structure which is not intended to be a detachment section as described above, can be free of a release lacquer coating over its entire extent in the thickness direction. This partial section can be delimited by at least one virtual surface, in particular a plane, that preferably runs essentially parallel to the thickness direction and intersects the layer structure.
  • This virtual surface can also run essentially parallel to the longitudinal direction or the width direction, at least partially or entirely.
  • the dimension of the layer structure in its thickness direction can be smaller in this partial section than outside this partial section.
  • This partial section preferably extends either over the entire dimension of the layer structure in the longitudinal direction or over the entire dimension of the layer structure in the width direction.
  • the packaging can be a bag, in particular for containing medical products, secondary packaging, a sachet pouch, or a sealed-edge flat bag.
  • the layered structure can, for example, be sealed against various base materials (or adhere to these base materials) as a lidding film, in particular a non-rigid one, or as a lidding cardboard, in particular a rigid one. This allows containers providing base materials, such as cups or bowls, which are preferably made of plastic, to be sealed, thus forming closed packages.
  • the invention relates to a method for producing an arrangement according to the invention, in particular a package, comprising the following steps: providing a layered structure according to the invention, which is preferably an outer material, and sealing the layered structure against a base material.
  • a “sealing” step is understood to mean a step of forming a connection between the layered structure and the base material, wherein this connection is formed by the adhesive layer and is thus, in particular, an adhesive connection.
  • An outer material is, in particular, arranged on a base material.
  • the adhesive layer preferably has an application weight of no more than 9.0 g/ m2 , measured on the dry or cured layer, on the release coating layer. If the layered structure adheres to a base material and the layered structure covers an opening in the base material, then at such application weights, when the layered structure is peeled off the opening, the adhesive layer tears along the circumference of the opening due to cracking. The opening is then released without a skin of adhesive layer closing the opening; in particular, the opening is released completely.
  • the adhesion layer is in particular a heat-sealing dispersion layer; it can be an EVAC dispersion layer, an acrylate dispersion layer, or a layer made of a solvent-based heat-sealing lacquer, e.g., based on polyester.
  • Values and/or range limits of the application weights and/or basis weights stated in the application have in particular an error tolerance of +0.04 g/m 2 and -0.05 g/m 2 .
  • a layer structure according to the invention is generally designated 10.
  • the layer structure forms an adhesive label.
  • Layered structure 10 is sealed, in particular as an upper material, onto a packaging material layer 12, which in particular forms a lower material.
  • the packaging material layer 12 can be the entire packaging material as a monolayer or can be part of a multilayer composite that forms the packaging material.
  • the layered structure has a paper layer as the most massive layer 14, which is also the layer with the highest basis weight. On its visible side 14a, the paper layer bears a print job 16 that is completely covered by a protective varnish layer 18 to protect it from external influences.
  • the protective varnish layer 18 is preferably transparent so as not to affect the appearance of the print job 16.
  • the paper layer 14 has a basis weight of 90 g/m 2 .
  • a release coating layer 20 is applied as a separating layer.
  • a heat-sealing layer 22 (or heat-sealing layer) is applied as a heat-sealing dispersion to the release coating layer 20 as the adhesion layer.
  • the heat-sealing layer 22 is preferably a polyolefin and can be, for example, a polyethylene or polypropylene layer.
  • the heat-sealing layer 22 can comprise or be an ethylene-vinyl acetate and/or an ethylene-vinyl acetate copolymer.
  • the packaging material layer 12 can be formed from the same sealable material as the heat-seal layer 22, so that by heating above the softening point and pressing them together, the heat-sealing layer 22, and thus the layered structure 10 as a whole, can be bonded to the packaging material layer 12.
  • the strength of the bond between the layered structure 10 and the packaging material layer 12 can be adjusted by the selected sealing temperature, the selected sealing pressure, and the selected sealing time.
  • the heat-sealing layer 22 is sealable against any materials, such as in particular against paper, PET, PP, PS, overprint varnishes and the like.
  • the application weight, again based on the dry state, of the heat-sealing layer 22 is preferably greater than the application weight (area weight) of the release lacquer application layer 20.
  • the heat-sealing layer 22 adheres with high adhesive force to the packaging material layer 12.
  • the adhesion of the heat-seal layer 22 to the release varnish coating layer 20 is lower than the adhesion of the release varnish coating layer 20 to the paper layer 14. This basically means that under the same release conditions, for example under the same type of delaminating peeling of one layer from another, a higher force is required to separate the release varnish coating layer 20 from the paper layer 14 than to separate the heat-seal layer 22 from the release varnish coating layer 20. Also, a higher force is generally required to separate the heat-seal layer 22 from the packaging material layer 12 than to separate the heat-seal layer 22 from the release varnish coating layer 20.
  • the heat-sealing layer 22 can be provided with color pigments as a tamper seal in order to create a 10 to make the remaining heat-sealing layer 22 particularly easy to recognize.
  • the color pigments of the heat-sealing layer 22 are preferably selected to contrast with color pigments in the packaging material layer 12 or in additional packaging material layers located below the packaging material layer 12 and visible from the side of the layer structure 10.
  • the entire layered structure is free of laminated layers and is produced solely by applying liquid or pasty layers to the paper layer.
  • the layered structure can advantageously be produced on a single machine during a single pass of a paper web through it.
  • the print coating 16 and the protective lacquer layer 18 are applied; on the opposite side 14b, the release lacquer coating layer 20 and the heat-sealing layer 22 are applied.
  • the adhesion layer 22 separates from the release lacquer coating layer 20 in the region of the collar 30. Furthermore, the adhesion layer 22 separates, in particular at an application weight of not more than 9.0 g/m 2 , measured on the dry or cured layer, of the adhesion layer 22 on the release lacquer coating layer 20, by cracking along the circumference of the cup opening 28, as indicated by the dashed lines 36l, 36r.
  • the cup opening 28 is exposed. If the adhesive layer 22 is formed as a cold-adhesive layer, the cup opening 28 can be resealed by placing the peeled-off layered structure 10 on the remainder of the adhesive layer 22 remaining on the collar 30. The sections of the adhesive layer 22 that adhere to the surface 34 after the peeling described above and are exposed to the outside adhere, after resealing, to exposed sections of the release coating layer 20 of the peeled-off layered structure 10 or to sections of the adhesive layer 22 remaining on the peeled-off layered structure 10.
  • Figure 2b shows the cup 26 with sections 22l, 22m, 22r of the adhesion layer 22 adhering to the surface 34 and exposed to the outside, as well as a release structure 11, which is formed from the layered structure 10 by the above-described peeling of this layered structure 10 from the cup 26.
  • the layers and plies of the release structure 11 are provided with the same reference numerals as those of the layered structure 10, and explicit reference is made to their description in connection with the layered structure.
  • Figure 3 shows a package 38 designed as a bag, which consists of two layers arranged one above the other of the Figure 1 described layer structure 10 is formed, wherein in Figure 3 only the layer 40 located on top in the view shown is shown.
  • These layers are embodiments of packaging material layers and are arranged one above the other with mutually facing adhesive layers 22, each designed as a heat-sealing layer.
  • Layer structures 10 of the layers are connected to one another along the outer periphery by a heat-sealed seam 42, so that the packaging 38 encloses a product contained within its interior.
  • the respective adhesion layers 22 of the superimposed layers are embodiments of the contact layers mentioned in the introduction to the description.
  • the adhesion layer 22 of the Figure 3 The layer structure 10 used for the layers can, in contrast to the description of this structure in connection with the Figure 1 be designed as a cold adhesive layer.
  • the layer structures 10 of the layers are then connected to one another along the outer circumference by a cold seal seam 42', whereby this alternative is also Figure 3 This 42' cold seal seam can be opened and resealed in the usual way.
  • Figure 4 shows a bag-shaped embodiment of a package 138 which incorporates many aspects of the Figure 3 described embodiment of the packaging 38 made of layers with layered structures 10, in which the adhesion layer 22 is a heat-sealing layer. Only the differences between the packaging 138 and the packaging 38 are described below. Elements and sections of the packaging 138 that correspond to those of the packaging 38 are provided with a reference numeral increased by 100 with respect to the corresponding elements or sections of the packaging 38, and explicit reference is made to the corresponding description of the packaging 38. This does not apply to the use of the reference numerals for the described layered structure 10 and its plies and layers.
  • the layer 140 has an opening 144, which allows access to the interior of the packaging 138.
  • the opening 144 is covered by a cover 146 formed from a layer structure 10.
  • the protective lacquer layer 18 of the layer structure 10 of the layer 140 is the contact layer of the layer 140.
  • the cover 146 is an embodiment of a paper lidding film and a top material, and the layer 140 is an embodiment of a bottom material.
  • the adhesive layer 22 of the cover 146 separates substantially along the circumference of the opening 144 due to cracking, and a section of the adhesive layer 22 of the cover 146 remains on the contact layer of the layer 140 due to the separation of the adhesive layer 22 of the cover 146 from the release lacquer application layer 20 of the cover 146. If, instead of a heat-sealing layer, a cold-adhesive layer is used as the adhesive layer 22 of the layer structure 10 of the cover 146, this section of the adhesive layer 22 of the cover 146 remaining on the contact layer forms an exposed adhesive surface.
  • This adhesive surface can serve to close the opening 144 by attaching the cover 146 or by a section of the packaging 138, wherein the section of the packaging 138 can be brought into contact with the adhesive surface by folding this packaging 138 over the opening 144. This creates a resealable adhesive closure of the packaging 138.
  • Figure 5 shows an embodiment of a package 238 designed as a bag, which is formed from two layers of packaging material arranged one above the other, possibly apart from the print, essentially identical.
  • the packaging material layer 212 located on top in the view shown is shown.
  • These packaging material layers can be monolayers made of plastic.
  • These packaging material layers are connected to one another along the outer circumference by a heat-sealed seam 242, so that the packaging 238 encloses a good accommodated in its interior.
  • the packaging material layer 212 has an opening 244, which allows access to the interior of the packaging 238.
  • the opening 244 is covered by a cover 246 formed from a layer structure 210 or 310, as is shown in relation to the Figures 6 and 7 is described in each case.
  • Figure 6 shows a second embodiment of a layer structure 210, which forms the cover 246 and is applied to the packaging material layer 212.
  • the layer structure 210 corresponds in many aspects to the Figure 1 described embodiment of the layer structure 10. In the following, unless otherwise stated, only the differences of the layer structure 210 from the layer structure 10 are described. Elements and sections of the layer structure 210 which correspond to those of Layer structure 10 are provided with a reference numeral increased by 200 with respect to the corresponding elements or sections of the layer structure 10, and explicit reference is made to the corresponding description of the layer structure 10.
  • the layer structure 210 of the cover 246 is, like the layer structure 10, flat and extends in a longitudinal direction L, a width direction B, which in Figure 6 perpendicular to the plane of the drawing, and a thickness direction D, which is Figure 5 runs perpendicular to the plane of the drawing.
  • the adhesion layer is spaced from the protective lacquer layer in the thickness direction D.
  • the layer structure 210 is free of a release lacquer application layer in the thickness direction D.
  • the partial section TA of the layer structure 210 is delimited from the partial section TB of the layer structure 210 forming the remainder of the layer structure 210 by a plane K which runs perpendicular to the longitudinal direction L and parallel to the thickness direction D.
  • the layer structure 210 has a constant dimension H0 in the thickness direction across its entire surface extent. This is achieved by the adhesion layer 222 having a dimension H1 in the thickness direction D in the partial section TA, which is equal to the sum of the dimension H2 of the adhesion layer 222 in the thickness direction D in the partial section TB and the dimension H3 of the release coating layer 220 present in the partial section TB.
  • the adhesion layer 222 has different dimensions H1, H2 in the thickness direction D along a direction of extent of the layer structure 210, here, for example, the longitudinal direction L.
  • the adhesive layer 222 separates from the release lacquer coating layer 220.
  • the adhesive layer 222 separates along the circumference of the opening 244 by cracking and a section of the adhesive layer 222 remains on the packaging material layer 212 forming a base material, as already described with regard to the embodiment of the Figure 4
  • the separation of the adhesion layer 222 from the release lacquer coating layer 220 begins during peeling in the peeling direction P at a first End section 248 of the layer structure 210.
  • the person peeling off the cover 246 feels increased resistance because the adhesive force between the adhesive layer 222 and the paper layer 214 is greater than the adhesive force between the release lacquer application layer 220 and the adhesive layer 222.
  • a crease line forms in the layer structure 210, at which the cover 246 bends. If the adhesive layer 222 is a cold adhesive layer, the exposed adhesive layer 222 remaining on the packaging material layer 212 after the cover 246 has been removed forms an adhesive surface to which the cover 246 can adhere again and close the opening 244 again.
  • Figure 7 shows a third embodiment of a layer structure 310, which forms the cover 246 as an alternative to the layer structure 210 and is applied to the packaging material layer 212.
  • the layer structure 310 corresponds in many aspects to the layer structure 310 shown in Figure 6 described embodiment of the layer structure 210. Unless otherwise stated, only the differences between the layer structure 310 and the layer structure 210 are described below. Elements and sections of the layer structure 310 that correspond to those of the layer structure 210 are provided with a reference numeral increased by 100 with respect to the corresponding elements or sections of the layer structure 210, and explicit reference is made to the corresponding description of the layer structure 210.
  • the dimension of the layer structure 310 is not the same over its entire surface extension in the thickness direction D.
  • this dimension H4 of the layer structure 310 in the thickness direction D is smaller than the dimension H5 of the layer structure 310 in the thickness direction D in the partial section TB.
  • the dimension H6 of the adhesion layer 322 in the thickness direction D is essentially the same in the partial sections TA and TB.
  • the dimension H5 is larger than the dimension H4 by the dimension H7 of the release lacquer application layer 320. If the cover 246 is applied to the packaging material layer 212, a purely schematic and exaggerated step 350 is formed.
  • the step 350 can, as shown in the Figure 7 indicated, be formed essentially in the packaging material layer 212, or, as outlined by the lines 352, 354 indicating an outer surface profile of the layer structure, be formed essentially in the cover 246.
  • the change in the profile of the packaging material layer 212 is not shown in the Figure 7
  • the step 350 can be formed in both the packaging material layer 212 and the cover 246.
  • level 350 is a jump in the Figure 7 shown schematically.
  • the step 350, as well as any steps possibly present in the packaging material layer 212, the adhesion layer 322, and/or the entire layered structure 310 or its layers and/or layers, are not formed as a jump, but rather as a deviation of the course of these layers, layers, and/or structures from a straight or flat course extending over a certain length in the longitudinal direction L.

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  • Wrappers (AREA)
  • Laminated Bodies (AREA)
  • Adhesive Tapes (AREA)
  • Paper (AREA)

Claims (13)

  1. Structure en strates plate (10 ; 210 ; 310) comprenant une couche d'adhésion (22 ; 222 ; 322), une couche de papier (14 ; 214 ; 314) et, entre la couche d'adhésion (22 ; 222 ; 322) et la couche de papier (14 ; 214 ; 314) une couche de séparation (20 ; 220 ; 320), la couche d'adhésion (22 ; 222 ; 322) étant en contact avec la couche de séparation (20 ; 220 ; 320),
    la couche de séparation (20 ; 220 ; 320) est appliquée en tant que strate appliquée de vernis anti-adhésif (20 ; 220 ; 320) sur la couche de papier (14 ; 214 ; 314) et est en contact avec la couche de papier (14 ; 214 ; 314),
    la strate appliquée de vernis anti-adhésif (20 ; 220 ; 320) est une strate appliquée de vernis anti-adhésif (20 ; 220 ; 320) à base de polyamide, et
    la strate appliquée de vernis anti-adhésif (20 ; 220 ; 320) étant appliquée sur la couche de papier (14 ; 214 ; 314) avec un poids d'application d'au moins 1,0 g/m2et
    la strate appliquée de vernis anti-adhésif (20 ; 220 ; 320) étant appliquée sur la couche de papier (14 ; 214 ; 314) avec un poids d'application ne dépassant pas 5 g/m2.
  2. Structure en strates plate (10 ; 210 ; 310) selon la revendication 1,
    caractérisée en ce que la force d'adhérence entre la strate appliquée de vernis anti-adhésif (20 ; 220 ; 320) et la couche de papier (14 ; 214 ; 314) est supérieure à celle entre la strate appliquée de vernis anti-adhésif (20 ; 220 ; 320) et la couche d'adhésion (22 ; 222 ; 322).
  3. Structure en strates plate (10 ; 210 ; 310) selon l'une des revendications précédentes,
    caractérisée en ce que la couche d'adhésion (22 ; 222 ; 322) contient des pigments colorés.
  4. Structure en strates plate (10 ; 210 ; 310) selon l'une des revendications précédentes,
    caractérisée en ce que la couche d'adhésion (22 ; 222 ; 322) est une couche thermoscellable (22 ; 222 ; 322) ou une couche de colle à froid.
  5. Structure en strates plate (10 ; 210 ; 310) selon l'une des revendications précédentes,
    caractérisée en ce que la couche d'adhésion (22 ; 222 ; 322) est appliquée sur toute la surface ou seulement sur une partie de la surface, en laissant des zones libres, sur la strate appliquée de vernis anti-adhésif (20 ; 220 ; 320).
  6. Structure en strates plate (10 ; 210 ; 310) selon l'une des revendications précédentes,
    caractérisée en ce que la couche de papier (14 ; 214 ; 314) présente un grammage de 40 g/m2 à 120 g/m2, de préférence de 80 g/m2 à 100 g/m2, de manière particulièrement préférée de 90 g/m2.
  7. Structure en strates plate (10 ; 210 ; 310) selon l'une des revendications précédentes,
    caractérisée en ce que la couche de papier (14 ; 214 ; 314) comporte, sur le côté opposé à la strate appliquée de vernis anti-adhésif (20 ; 220 ; 320) (14a ; 214a ; 314a) comporte une application de couleur (16 ; 216 ; 316) et/ou une strate de vernis de protection (18 ; 218 ; 318).
  8. Structure en strates plate (10 ; 210 ; 310) selon l'une des revendications précédentes,
    caractérisée en ce que la structure en strates (10 ; 210 ; 310) ne comporte que les couches et strates mentionnées (14, 16, 18, 20, 22 ; 214, 216, 218, 220, 222 ; 314, 316, 318, 320, 322) et/ou en ce que la structure en strates (10 ; 210 ; 310) est formée uniquement par application de strates liquides ou pâteuses sur la couche de papier (14 ; 214 ; 314).
  9. Structure en strates plate (10 ; 210 ; 310) selon l'une des revendications précédentes,
    caractérisée en ce que la structure en strates (10 ; 210 ; 310) est un couvercle pour un récipient et/ou une étiquette adhésive ou une bande de matériau.
  10. Procédé de fabrication d'une structure en strates plate (10 ; 210 ; 310) selon l'une des revendications précédentes, comprenant les étapes suivantes :
    - transport d'une bande de papier (14 ; 214 ; 314) à travers un dispositif d'application,
    - pendant le transport, application d'une vernis anti-adhésif à base de polyamide sur un côté (14b) de la bande de papier (14 ; 214 ; 314) avec un poids d'application d'au moins 1,5 g/m2 et avec un poids d'application ne dépassant pas 5 g/m2,
    - revêtement du vernis anti-adhésif avec un matériau adhésif.
  11. Procédé selon la revendication 10,
    caractérisé par les étapes supplémentaires suivantes :
    - impression de l'autre face (14a ; 214a ; 314a) de la bande de papier (14 ; 214 ; 314) sur laquelle aucun vernis anti-adhésif n'est ou n'a été appliqué, avec au moins une encre d'impression,
    - en option : revêtement de l'encre d'impression (16 ; 216 ; 316) avec un vernis de protection.
  12. Dispositif comprenant une structure en strates plate (10 ; 210 ; 310) selon l'une des revendications 1 à 9 et un matériau de base, la couche d'adhésion (22 ; 222 ; 322) de la structure en strates (10 ; 210 ; 310) adhérant au matériau de base.
  13. Procédé de fabrication d'un agencement selon la revendication 12, comprenant les étapes suivantes :
    - fourniture d'une structure en strates plate (10 ; 210 ; 310) selon l'une des revendications 1 à 9, et
    - scellement de la structure en strates plate (10 ; 210 ; 310) contre un matériau de base.
EP21188572.8A 2020-07-31 2021-07-29 Structure en couches à aptitude améliorée au recyclage Active EP3945155B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020120274.1A DE102020120274A1 (de) 2020-07-31 2020-07-31 Haftetikett mit verbesserter Recyclingfähigkeit

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EP3945155A1 EP3945155A1 (fr) 2022-02-02
EP3945155B1 true EP3945155B1 (fr) 2025-09-17

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Publication number Priority date Publication date Assignee Title
GB2618057A (en) * 2022-02-25 2023-11-01 Gardiner Graphics Group Ltd Repulpable, self-adhesive printable paper

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0555830A1 (fr) * 1992-02-14 1993-08-18 Findley Adhesives Inc. Composition de revêtement détachable à base d'eau utilisable pour des matériaux d'emballage
DE4309644A1 (de) 1993-03-25 1994-09-29 Pago Etikettiersysteme Gmbh Verschlußelement
US6344269B1 (en) * 1996-12-11 2002-02-05 Avery Dennison Corporation Heat-transfer label
US6099682A (en) * 1998-02-09 2000-08-08 3M Innovative Properties Company Corporation Of Delaware Cold seal package and method for making the same
EP0976580A1 (fr) * 1998-07-28 2000-02-02 Heineken Technical Services B.V. Etiquette adhésive sensible à la pression et procédé pour apposer l'étiquette
DE10140769A1 (de) * 2001-08-20 2003-03-06 Basf Ag Mit Lack beschichtete Folien
ATE485350T1 (de) * 2007-03-21 2010-11-15 Hueck Folien Gmbh Sicherheitsfolie mit manipulationsnachweis
AT507353B1 (de) * 2008-09-29 2012-04-15 Hueck Folien Gmbh Verfahren zur strukturierung von anorganischen oder organischen schichten
DE102013108318B4 (de) 2012-08-02 2019-11-21 Trautwein Gmbh & Co. Etikett, insbesondere zum Abdecken von Informationen
JP6312803B2 (ja) * 2013-04-10 2018-04-18 マイラン・グループ 積層基板を含む平版印刷版
ES3047126T3 (en) 2015-06-19 2025-12-03 Hueck Folien Gmbh Safety label with manipulation verification

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DE102020120274A1 (de) 2022-02-03
EP3945155A1 (fr) 2022-02-02

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