EP3611027B1 - Multilayer composite and method for the production thereof and a multilayer composite for a valuable and / or security document - Google Patents

Description

The invention relates to a multi-layer composite and a method for its production as well as a valuable and/or security document.

Valuable and/or security documents, which include a data carrier, are used to identify persons and/or objects. For example, in the case of a passport, such a data carrier can represent an insert sheet, which is bound into the passport by means of an overhang arranged on a data side of the insert sheet. Furthermore, card-shaped data carriers such as check cards, access cards, ID cards or the like are known, which consist of a multi-layer structure, in particular a multi-layer composite. To protect against counterfeiting and/or falsification, a large number of different security features are proposed for such data carriers, such as guilloches, watermarks, embossed marks, transmitted light registers, holograms or the like. These are intended to make counterfeiting more difficult or even practically impossible.

From the WO 2005/025891 A1 a film security element for application to a data carrier such as a banknote, a security, an identity card or the like with a film substrate is known, which is provided with a security feature. The film security element has a perforation area with at least one recess that breaks through the element. An underlying security feature of the data carrier can be recognized visually and/or by machine through these gaps.

From the EP 2 116 390 A1 a data carrier in the form of a data page is known, which is constructed in multiple layers. This data page includes a flap which forms an overhang in relation to the data page in order to sew the data page into a security and/or value document. The data page is formed by a multi-layer structure, which comprises a fleece strip and a printed sheet arranged therewith, which are connected to one another by transparent cover layers arranged on their outside.

From the DE 103 43 389 A1 an analog personalization data page for a book-like document of value is known. Customary paper pages or biaxially suitable polypropylene are used for the production of the personal data page, which are provided with polycarbonate foils on both sides.

From the WO2005/025891 A2 is also a data carrier, such as a banknote, known, which consists of a security paper. A film application element in patch form is provided on this security paper. This includes a transparent central window area. Below this central window area of the foil application element, a translucent area is formed in the security paper by the action of a substance such as concentrated sulfuric acid. The combination of the transparent window area of the film application element with the translucent area of the bank note results in an area that appears bright in transmitted light inside the window area of the film application element.

From the EP 2 429 825 B1 a security element such as a banknote is known. This includes a substrate made of a material that essentially includes paper based on natural and/or synthetic fibers. To form a security element, a first layer is applied to one side of the substrate, which serves as an impregnation and includes free areas in which a translucent ink is applied.

From the U.S. 2003/082348 A1 a security document is made from a cellulosic material impregnated with a substance forming a transparent section.

From the EP 1 574 359 A2 a data page for a book-like value document emerges. The data page consists of a laminate in which a flap is inserted between several layers and fixed by the lamination.

the EP 1 502 765 A1 discloses a personalized data page of a passport in which a flexible layer is provided with a polymer layer on both sides.

Such data sheets or data carriers have the disadvantage that manipulations of printed images, for example by covering, sticking over, painting over, cannot be detected without a more detailed check.

The invention is based on the object of creating a multi-layer composite which enables simple detection of a manipulation of a printed image. Furthermore, the invention is based on the object of proposing a method for its production, which makes manipulation of a printed image more difficult. Furthermore, the invention is based on the object of proposing a value and/or security document with further increased security against manipulation.

To solve this problem, a multi-layer composite as defined in claim 1 is proposed. Due to the at least partial or at least area-wise impregnation of the fibrous layer with the melt of the hot-melt adhesive patch, the light-scattering property of the fibrous layer is reduced depending on the melt, so that opaque areas of the fibrous layer can be converted into partially translucent areas or translucent areas by the melt. This allows a Create see-through feature. In this way, the printed image can not only be viewed from the data side in reflected light, but is also made visible via the title page. The printed image can preferably be visible in reflected light from the title page, so that the printed image can be viewed from its back. At least, however, the printed image can become visible in transmitted light due to the impregnation of the fiber layer with the melt. This see-through feature thus makes it possible for any manipulations on the data page by pasting over, covering or painting over the printed image to be easily detected from the title page, since the deviations from the printed image then become obvious.

“Printed image” is understood to mean a printed reproduction that is structured in some way or covers the entire surface. As a structured print reproduction, for example, an image such as a passport photo or portrait or a graphic print reproduction such as guilloches or background screening or alphanumeric characters or a one- or two-dimensional barcode, emblem, coat of arms, national emblem or any other print reproduction can be considered. The opacity of the fiber layer can be changed by introducing the quantity or the proportion of the melt in a predetermined area or at a predetermined point in the fiber layer. By increasingly filling the interstices in the fiber layer with a preferably clear melt, increasing transparency can be created, so that not only are transition areas between opacity and partial transparency possible, but complete transparency can also be achieved. In this case, the fiber layer is completely saturated by the melt.

The fiber layer is advantageously impregnated with a transparent melt produced from the hot-melt adhesive patch and has fibers with a refractive index that are approximately the same or identical to the refractive index of the melt of the hot-melt adhesive patch. Due to the When the melt is introduced into the fiber layer, air displacement between the individual fibers of the fiber layer is achieved in the introduced area, so that the air pockets no longer cause light to be scattered and a semitransparent or transparent or translucent effect can thus be set and achieved.

Preferably, at least the area of the fiber layer covered by the printed image is at least partially impregnated in the two-dimensional direction of extent of the data sheet and completely over the thickness of the fiber layer of the melt produced from the hot-melt adhesive patch. For example, in the case of a printed coat of arms or national emblem created by a line structure, the impregnation of the melt can run along the line structure, so that only the line structure is visible in transmitted light and possibly also in reflected light. For example, a covered area can also be completely filled with the melt by a full-surface portrait. It is also conceivable that the melt forms an outer edge around the flat printed image. Depending on the printed image and the desired effect, targeted darkening or brightening by means of such a melt can also be used to protect individual areas of the printed image.

The at least one layer made of a polymer is preferably transparent. This makes it easier to view the printed image from the title page in both transmitted and reflected light. Alternatively, this further layer on the title page can also be only partially transparent or have darkenings in the area of the printed image in order to achieve certain superimpositions or completions of the image in interaction with the printed image in order to detect manipulations more easily with the eye without technical aids.

The fiber layer can be made from a random arrangement of natural and / or synthetic fibers exist, such as a flat Fiber bundles, a fiber network, a flat fiber arrangement, in particular a fleece, a felt, a paper or a cellulose-containing layer. Alternatively, the fibrous layer may also consist of an aligned arrangement of fibers, such as a woven fabric, a knitted fabric, a crocheted fabric, a braid, a stitch-bonded fabric or a textile. Advantageously, the fiber layer can consist of natural fibers, synthetic fibers and a mixture of natural and synthetic fibers.

Furthermore, the melt of the hot-melt adhesive patch can contain materials from the group consisting of color pigments, effect pigments, optically variable pigments and/or luminescent substances or pigments or fluorescent substances or pigments. This can result in an additional increase in security against forgery.

In order to improve the transmitted light effect when introducing the security feature by impregnation, the fiber layer is preferably thinned out in this area. The fibrous layer may include thinned areas in the form of lines or areas. Squares and/or circles can be produced in a planar or linear manner. The thinned out areas are preferably generated by addition watermarks. A print image or data is printed into the thinned area, in particular using an inkjet method, and at least this area is filled with the hot-melt adhesive patch, so that at least this thinned area becomes transparent.

The see-through feature produced by means of the impregnation and/or at least regional impregnation on or in the fiber layer can, for example, correspond to the printed image or comprise an area which is designed to be partially and/or completely transparent in order to also display spatial dimensioning or filigree structures.

The multi-layer composite preferably comprises a fiber layer with perforations, in which connecting webs are formed when the fiber layer is connected to the layers.

It is preferably provided that the thickness of the layers of thermoplastic polymer between which the at least one fiber layer is laminated or glued corresponds to 0.5 to 1.5 times the diameter or the minimum width of the perforation holes in the fiber layer. This specific dimensioning of the thickness of the layers or cover layers relative to the fiber layer makes it possible for uncontrolled breakage points to occur in the layer during a manipulation that provides for the layer made of thermoplastic polymer to be separated from the fiber layer. Due to the proportions of the diameter or the minimum width of the perforation hole or the diameter or the minimum width of the connecting web formed therein to the thickness of the layer, a reinforced zone is formed in the layer in the transition area from the connecting web to the layer, so that when the layer is detached from it A fracture point forms in the adjacent area due to the notch effect, which also breaks in an uncontrolled manner. By selecting the aspect ratio between the diameter of the perforation hole, ie the thickness of the connecting web to the thickness of the layer made of thermoplastic polymer, it is also achieved that the connecting web is retained in the fiber layer.

In order to form a predetermined breaking point when the multi-layer composite is manipulated, it is preferably provided that the diameter or the minimum width of the perforation hole is at least 0.5 times the thickness of the fiber layer. Preferably, the diameter or minimum width is 1 to 4 times the thickness of the fibrous layer. As a result, the rigidity and tear resistance of the connecting web in the perforation hole can be ensured.

The geometry of the perforation holes for forming the connecting webs can be round, oval, angular, linear or strip-shaped. As a result, security features provided in or on the layer can be additionally protected in an improved manner.

It is preferably provided that perforation holes with the same diameter or the same size of the selected geometry in the Fiber layer are introduced. This enables uniform protection over an entire data or title page.

The perforation holes in the fibrous layer are preferably arranged in an area adjoining a printed image applied to the fibrous layer and/or within the printed image. As a result, such security-relevant areas as, for example, portraits or optically active security features or the like can be additionally secured.

The object on which the invention is based is also achieved by a method defined in claim 11 for producing a multi-layer composite. Such a local or partial impregnation of the fiber layer by means of a melt can create an individual design of a see-through feature that is diverse in terms of structure and construction, shape or geometry and can be adapted to the printed image. By soaking with the melt, the scattering property of fibers of the fiber layer is reduced and/or eliminated, so that the degree of light transmission can be adjusted and the printed image applied to the fiber layer is visible at least in transmitted light, advantageously also in reflected light.

Furthermore, a filler is applied or introduced onto and/or into the fiber layer in the areas that should not be transparent, so that there is increased transparency of the fiber layer in this area. For example, kaolin, titanium dioxide, calcium carbonate and the like can preferably be used as fillers, in order in particular to achieve full-surface filling.

Before the fiber layer is impregnated and the melt produced from the hot-melt adhesive patch is introduced into the fiber layer, it is preferably thinned out in at least that region. Then will the printed image is applied to this thinned area, for example from the data side, and then applied to the title page of the hot-melt adhesive patch, so that it can penetrate into the fiber layer. As a result, the thickness of the fiber layer and thus the amount of melt to be introduced from the hot-melt adhesive patch can be reduced in order to achieve a see-through effect.

The hot-melt adhesive patch is preferably applied and heated under pressure.

Furthermore, it is preferably provided that perforation holes are made in the fiber layer, which penetrate the fiber layer and a printed image is applied to the fiber layer within a print area, and at least one layer is fed and stacked on the data side and the title page of the fiber layer and the layers and the fiber layer are laminated and/or glued, connecting webs being formed in the perforation holes. This allows additional anchoring between the layers. Attempting to detach the layers from the connecting webs can lead to cracks, which form an optically active security feature.

Furthermore, it is preferably provided that the diameter or the minimum width of the perforation holes in the fiber layer is determined depending on the thickness of the layer made of thermoplastic polymer and the thickness of the layer is 0.5 to 1.5 times the diameter or the minimum width of the perforation holes, or the diameter or the minimum width of the connecting bars.

Provision is preferably made for the perforation holes to be introduced into the fiber layer by means of laser processing or punching.

Furthermore, it is preferably provided that the fiber layer is impregnated or saturated with a binder before the layers of thermoplastic polymer are connected to the fiber layer, or that a coat is applied. The impregnation with binder can enable an improved connection between the fiber layer and layers. By applying a line, a improved printability of the fibrous layer prior to application and bonding of the layers to the fibrous layer.

The object on which the invention is based is also achieved by a value and/or security document which comprises a multi-layer composite according to one of the embodiments described above.

• Figur 1 eine schematische Ansicht auf eine Kernlage für einen Mehrschichtverbund eines Sicherheitsmerkmals,
• Figur 2 eine schematische Schnittansicht entlang der Linie I-I in Figur 1,
• Figur 3 eine schematische Schnittansicht des Mehrschichtverbundes gemäß einer bevorzugten Ausführungsform,
• Figur 4 eine perspektivische Ansicht des Mehrschichtverbundes gemäß Figur 3 bei einer Manipulation,
• Figur 5 eine schematische Ansicht eines Druckbereichs mit einem Druckbild zugeordneten Verbindungsstegen und
• Figur 6 eine schematische Ansicht einer alternativen Ausführungsform zu Figur 5.

The invention and other advantageous embodiments and developments thereof are described and explained in more detail below with reference to the examples shown in the drawings. Show it:

• figure 1 a schematic view of a core layer for a multilayer composite of a security feature,
• figure 2 a schematic sectional view along the line II in figure 1 ,
• figure 3 a schematic sectional view of the multilayer composite according to a preferred embodiment,
• figure 4 a perspective view of the multilayer composite according to FIG figure 3 during a manipulation
• figure 5 a schematic view of a print area with a print image associated connecting webs and
• figure 6 a schematic view of an alternative embodiment figure 5 .

In figure 1 a schematic view of a multi-layer composite 11 is shown. figure 2 shows a schematic sectional view along the multilayer composite 11 along the line II in figure 2 .

Such a multi-layer composite 11 can represent a data carrier, for example, such as an access card, an identity card or the like. Such a multi-layer composite 11 can also be designed as an insert sheet for a book-like valuable and/or security document, in which case the multi-layer composite 11 is designed with a flap in order to insert such an insert sheet into a to include book-like valuable and/or security documents, in particular to sew them in. Alternatively, such a multi-layer composite 11 can also be part of a book cover or an endpaper for a book-like document of value and/or security.

The multi-layer composite 11 comprises a fiber layer 18 which has a layer 16 made of a polymer on a front side, which forms a data side 14 . On the opposite side of the fiber layer 18, the title page 15, at least one further layer 17 made of a polymer is preferably applied. Alternatively, this can also be omitted. Before the layer 16 is applied to the fiber layer 18 , a printed image 21 is applied to the fiber layer 18 in the printing area 22 . This printed image 21 can be printed using an inkjet method, for example. The fiber layer 18 can consist of a random arrangement of natural and/or synthetic fibers, such as a flat fiber bundle, a fiber network or a flat fiber arrangement, in particular a fleece or a felt. Furthermore, the fiber layer can consist of paper fibers and/or cellulose fibers.

Furthermore, the fibrous layer 18 may be formed from an aligned array of fibers, such as a woven, knitted, braided, or stitchbonded fabric, or a textile. The fiber layers are printable. The fiber layer 18 can be made of pure natural fibers or pure synthetic fibers or a combination or a mixture of natural and synthetic fibers.

The fiber layer 18 has, for example in the configuration as a synthetic fiber substrate, in particular with a PET fiber, a basis weight of less than/equal to 200 g/m ² . When using paper for a fiber layer 18, for example, a basis weight of 100 g/m ² or less is provided.

The fibers used for the fiber layer 18 are preferably transparent.

The casting compound 19, which is not according to the invention, preferably consists of crosslinking clear acrylates or polyurethanes. All clear casting compounds and adhesives that have a low viscosity at a processing temperature can also be used as the casting compound 19 . The potting compound consists in particular of PETG. As an alternative to the casting compound, a hot-melt adhesive patch (e.g. a stamped part made of clear PETG or transparent PC) can be applied and heated under pressure and thus impregnated with this melt.

In figure 1 For example, a printed image 21 is shown in the form of a stylized flower. This printed image 21 can be an OVI structure, for example. This is an imprint on the fiber layer 18 by means of an optically variable ink (Optically Variable Ink).

According to a first embodiment, as also in figure 2 is shown, the fiber layer 18 can be completely saturated with the melt 19 of the hot-melt adhesive patch in the print area 22 arranged in the printed image 21, so that the area of the fiber layer 18 adjoining the print area 22 is completely saturated both in terms of the two-dimensional direction of extent and in terms of thickness becomes. As a result, such a printed image 21 is visible in reflected light, in particular if the layer 17 is transparent. Alternatively, the fiber layer 18 can be saturated with the casting compound 19 in adjacent areas or intermediate areas between the geometric shapes or lines. Alternatively, the saturation may map the lines of the printed image 21 to again provide a see-through feature.

Depending on the proportion of the melt 19 of the hot-melt adhesive patch within the fiber layer 18 in relation to the thickness of the fiber layer 18, the transparency of the fiber layer 18 can be adjustable, so that there are smooth transitions from an opacity of the fiber layer 18 to a semi-transparent area or to a transparent area Area can be created and adjusted.

In figure 1 a coat of arms is also shown as printed image 21 . The fiber layer 18 can be thinned out in the printed area 22 of the printed image 21 designed as a coat of arms. After the print area 22 has been thinned out, the coat of arms, for example, is printed on. Following this, according to this exemplary embodiment shown, the melt 19 of the hot-melt adhesive patch is introduced in such a way that it depicts the course of the line of the coat of arms. Consequently, linear impregnation is made possible at least in partial areas of the coat of arms, with areas in which lines lying close to one another being able to result in areal impregnation.

When the multi-layer composite 11 is designed as a data carrier, such as an ID card or an access card in ID3 format, it is preferably provided that the outer layers 16, 17 form a peripheral closed edge, so that the fiber layer 18 is completely enclosed and the peripheral edge through the lamination of the two layers 16, 17 is formed directly to one another.

If the multi-layer composite 11 is designed as an insert sheet for a book-like valuable and/or security document, the data side 14 is followed by a flap which is formed by the fiber layer 18 with one or both layers 16, 17 or by at least one layer 16, 17 can be. Alternatively, a tab in the form of a strip can also be inserted between the two layers 16, 17 and adjoin the fiber layer 18 in the area of the data side 14.

The multilayer composite 11 according to figure 3 shows an embodiment that is also used in the multilayer composite 11 according to FIG figure 2 can be provided and/or superimposed.

The fiber layer 18 according to figure 3 comprises perforation holes 26 which extend completely through the thickness of the fibrous layer 18. These perforation holes 26 can be arranged at regular intervals or irregularly to one another or can form specific patterns or structures and be provided in the fiber layer 18 . All perforation holes 26 preferably have the same diameter.

By laminating the layers 16, 17 to form the fiber layer 18, connecting webs 27 are formed in the perforation holes 26 through the layers 16, 17, by means of which the layers 16, 17 are connected to one another. Furthermore, it can be provided that the layers 16 , 17 are glued to form the fiber layer 18 and also form a material connection between the upper and lower layers 16 , 17 via the connecting webs 27 .

In figure 4 12 is a perspective view of the multi-layer structure 11 in FIG figure 5 shown in which a manipulation is undertaken in which the top layer 16 is to be removed from the fibrous layer 18 by peeling or cleaving. In the process, fracture points 29 are produced in a targeted manner in the peeled-off layer 16, which form the fracture point 29 in the layer 16, for example as holes with an uncontrolled border. A defined predetermined breaking point 31 in the transition area between the connecting web 27 and the layer 16, 17 causes maximum damage when the layer 16, 17 is peeled off.

This defined breaking point 31 is achieved by selecting an aspect ratio between the diameter of the perforation hole 26 or the connecting web 27 and the thickness of the layer 16, 17. The layer thickness of the layer 16, 17 is preferably 0.5 to 1.5 times the diameter of the connecting web 27 or the perforation hole 26. Furthermore, this defined predetermined breaking point 31 can be affected by the aspect ratio between the thickness of the fiber layer 18 and the diameter of the perforation hole 26 be favored. The diameter of the perforation hole 26 is at least 0.5 times the thickness of the fiber layer 18.

In figure 4 the print area 22 of the multi-layer structure 11 is shown as an example. To further secure areas relevant to security, such as the printed image 21, perforation holes 26 can be provided as a border of the printed image 21, so that when the printed image 21 is attempted to be detached, the entire edge area of the printed image 21 has uncontrolled breakage points.

In figure 5 is an alternative embodiment to figure 4 shown. In this embodiment, it is provided, for example, that perforation holes 26 are formed in the entire printing area 22, in which fiber connecting webs 27 have formed after the layers 12, 16, 17 have been connected by lamination and/or gluing.

Furthermore, it can alternatively be provided that, in order to connect the upper and lower layers 16, 17, the fiber layer 18 is impregnated with an adhesion promoter and the layers 16, 17 are connected to one another and connecting webs 27 of the fiber layer 18 are formed. The use of an adhesion promoter has the advantage that the layers 16, 17 can also deviate from one another and a positive connection can nevertheless be created between the upper and lower layers 16, 17.

It goes without saying that the layer 16, 17 can also be formed by two or more layers.

indicator list

• 11. Multi-layer composite
• 12. Data sheet
• 14. Data Page
• 15. Title page
• 16th layer
• 17th layer
• 18. Fiber layer
• 19. Meltdown
• 21. Print image
• 22. Print area
• 25. Areas of infusion
• 26. Perforation holes
• 27. Connecting bars
• 31. Breaking point

Claims (16)

1. Multilayer composite for a security document and/or document of value, which multilayer composite comprises at least one data sheet (12) having a data side (14) and a title side (15) and consisting of at least one fibrous layer (18) and at least one layer (16, 17) made of a polymer and applied to at least one side of the fibrous layer (18), and having a printed image (21) applied to the data side (14) of the fibrous layer (18) in a print area (22), wherein at least the region of the fibrous layer (18) that is covered by the printed image (21) is impregnated, at least in some regions, in order to change the opacity of the fibrous layer (18), with a melt produced under pressure and with heating from a hot melt adhesive patch (19), and a see-through feature is formed.
2. Multilayer composite according to claim 1, characterised in that, by the proportion of melt produced from the hot melt adhesive patch that is applied locally to the fibrous layer (18), the opacity of the fibrous layer (18) is changeable to the point of transparency of the fibrous layer (18).
3. Multilayer composite according to claim 1, characterised in that the fibrous layer (18) is impregnated with a melt produced from a hot melt adhesive patch (19) consisting of clear PETG or transparent PC, and the fibres of the fibrous layer (18) have a refractive index which is approximately equal or identical to the refractive index of the melt produced from the hot melt adhesive patch (19).
4. Multilayer composite according to claim 1, characterised in that at least the region of the fibrous layer (18) that is covered by the printed image (21) is impregnated with the melt produced from the hot melt adhesive patch (19) at least in some regions in the areal direction of extension of the data sheet (12) and completely over the thickness of the fibrous layer (18).
5. Multilayer composite according to claim 1, characterised in that the at least one layer (16, 17) is transparent.
6. Multilayer composite according to claim 1, characterised in that the fibrous layer (18) consists of a random arrangement of natural fibres and/or synthetic fibres, in particular of a sheet-form fibre bundle, a fibre network or a sheet-form fibre arrangement, preferably of a non-woven fabric, a felt, a paper, or consists of an oriented arrangement of fibres, in particular of a woven fabric, a knitted fabric, a mesh, a sewn fabric or a textile.
7. Multilayer composite according to claim 1, characterised in that the fibrous layer (18) is thinned in the region of the see-through feature (20) and/or in that the see-through feature produced by means of impregnation of the fibrous layer (18) coincides with the printed image (35) or forms a contour around the printed image.
8. Multilayer composite according to claim 1, characterised in that the fibrous layer (18) comprises perforation holes (26) in which connecting elements (27) are formed when the fibrous layer (18) is bonded to the layers (16, 17), and preferably the perforation holes (26) have a round, angular, oval, line-shaped or strip-shaped geometry and in particular the perforation holes (26) are formed with an identical diameter or an identical geometry.
9. Multilayer composite according to claim 8, characterised in that the thickness of the layers (16, 17) corresponds to from 0.5 to 1.5 times the diameter or minimum width of the at least one perforation hole (26) or the diameter or minimum width of the at least one connecting element (27) in the fibrous layer (18), and/or the diameter or minimum width of the perforation holes (26) is at least 0.5 times the thickness of the fibrous layer (18), in particular from 1 to 4 times the thickness of the fibrous layer (18).
10. Multilayer composite according to claim 8, characterised in that the perforation holes (26) in the fibrous layer (18) are provided adjacent to a printed image (21) applied to the fibrous layer (18) and/or are provided within the printed image (21).
11. Method for producing a multilayer composite (11) for a security document and/or document of value, which multilayer composite comprises at least one data sheet (12) having a data side (14) and a title side (15), and the data sheet (12) is formed of at least one fibrous layer (18), in which a printed image (21) is applied at least to the data side (14) of the fibrous layer (18) within a print area (22) of the data side (14), in which at least one layer (16, 17) made of a polymer is applied to the print area (22) of the fibrous layer (18), wherein at least the region of the fibrous layer (18) that is covered by the printed image (21) is impregnated, at least in some regions, with a melt produced under pressure and with heating from a hot melt adhesive patch (19) in order to locally change the opacity of the fibrous layer (18), and a see-through feature is formed.
12. Method according to claim 11, characterised in that a filler, in particular kaolin, titanium dioxide, calcium carbonate, is applied to the fibrous layer (18) .
13. Method according to claim 11, characterised in that, prior to the impregnation of the fibrous layer (18) with the melt produced from the hot melt adhesive patch (19), the fibrous layer (18) is subjected to a reduction in thickness in the print area (22), in particular by means of pressure exerted on the fibrous layer (18).
14. Method according to claim 11, characterised in that the hot melt adhesive patch is applied and heated under pressure, and the fibrous layer (18) is impregnated with this melt.
15. Method according to claim 11,
    characterised in that

    - there are introduced into the fibrous layer (18) perforation holes (26) which pass through said fibrous layer (18),

    - a printed image (21) is applied to the fibrous layer (18) within a print area (22),

    - at least one layer (16, 17) is supplied and stacked on each of the data side (14) and the title side (15) of the fibrous layer (18),

    - the layers (16, 17) and the fibrous layer (18) are laminated or bonded together, and connecting elements (27) are formed in the perforation holes (26), and preferably the diameter or minimum width of the perforation holes (26) in the fibrous layer (18) is determined in dependence on the thickness of the layers (16, 17), and in that the thickness of the layer (16, 17) is from 0.5 to 1.5 times the diameter or minimum width of the at least one perforation hole (26), and preferably the perforation holes (26) are introduced by laser machining or by punching.
16. Document of value and/or security document having at least one multilayer composite (11), characterised in that the multilayer composite (11) is constructed according to any one of claims 1 to 10.

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