EP3902678A1

EP3902678A1 - Method and device for providing a layer assembly, and layer assembly

Info

Publication number: EP3902678A1
Application number: EP19832688.6A
Authority: EP
Inventors: Josef Riedl; Prafulla TOKE; Andreas Pawlik; Martin Wielpütz; Jochen Fritz; Florian HERMES
Original assignee: Giesecke and Devrient Mobile Security GmbH; Evonik Operations GmbH
Current assignee: Evonik Operations GmbH; Giesecke and Devrient ePayments GmbH
Priority date: 2018-12-28
Filing date: 2019-12-20
Publication date: 2021-11-03
Also published as: WO2020136136A1; TW202041391A; DE102018133678A1

Abstract

The present invention is directed to a method for providing a layer assembly for the stable introduction of a data page in a value document, to the layer assembly per se, and to a device for carrying out the proposed method and for providing the layer assembly. The present invention is also directed to a data page having the layer assembly, and to a value document in which the data page is introduced. Furthermore, proposed is a computer program product having control commands which carry out the proposed method and operate the proposed device.

Description

METHOD AND DEVICE FOR PROVIDING A LAYER ARRANGEMENT AND LAYER ARRANGEMENT

The present invention is directed to a method for providing a layer arrangement for the stable introduction of a data page into a document of value as well as to the layer arrangement itself and to an apparatus for performing the proposed method or for providing the layer arrangement. Furthermore, the present invention is directed to a data page, having the layer arrangement, and to a document of value, into which the data page is inserted. Furthermore, a computer program product is proposed with control commands which carry out the proposed method or operate the proposed device. According to the invention, a possibility is proposed to provide a layer which allows a data page to be inserted flexibly and stably in a value document.

It is known to provide a data page for movable fastening in a data carrier, in particular for incorporation in a value document. For this purpose, a data sheet is provided, which contains the actual information such as B. has the passport holder and a flexible layer for securing the data page in the data carrier. The data carrier is typically a document of value, which may or may not be available as a passport book. Here, the person skilled in the art recognizes further value documents, which are book-like and have a corresponding data sheet.

It is also known to provide layer arrangements which are either co-extruded or laminated. Various layers are stacked on top of one another and either hot pressed, ie laminated, or provided by means of a starting material which is melted and molded under pressure, that is to say is coextruded. This creates a permanently connected layer arrangement, which is suitable, for example, as a data page in a value document. In this case, this layer arrangement has a flexible area which is designed as a hinge, also called hinge, and stiffer layers which make up the actual data page. Here, for example, textile hinge areas are known which make it possible, owing to the flexible textile area, to insert the data page into the value document in such a way that it can be browsed in the book.

Typically, such data pages are made of polycarbonate (PC), which, however, often proves to be disadvantageous in practice. For example, polycarbonate is often very rigid and therefore susceptible to the effects of force.

Currently, all ID cards and data pages for value documents are almost exclusively made from a PC. Fabric is usually used as the hinge material; either uncoated, coated or laminated together with foils.

PC is a very hard, stiff material that is not chemically stable and leads to microcracks under tension. This means that long-term stability can only be achieved through appropriate aid measures, such as B. Crack prevention in the module area and / or coatings of the films.

The fabrics for the hinge always mean a foreign body for the laminate and disturb the design image. In addition, the introduction of a fabric strip is always associated with high process costs. The tissue Striping is also very expensive compared to the film material and the tear resistance is low. PC foils cannot therefore be used as a hinge.

It is therefore a disadvantage of the prior art that the flexible area of the data pages, which serves as a hinge, is often either not flexible or at least not flexible enough. If this hinge area is too rigid, breaks can occur and the user comfort of such a value document is restricted. Furthermore, according to the prior art it is problematic that although various materials are known with which such a hinge area could be satisfactorily designed, these materials are difficult to connect in practice in such a way that further aids such as e.g. B. adhesive layers or bonding agent layers are necessary. However, appropriate adhesion promoter layers are particularly disadvantageous here, since they require an additional coextruder and, moreover, more raw materials have to be used.

Polyamide (PA) is a polymer that comes in multiple facets. However, almost all PA types have in common that they are very flexible and have high flexural strength (eg the material is used as a hinge in the furniture industry). However, it combines poorly with polycarbonate, i.e. H. no suitable composite is obtained during lamination.

Only with the help of glue can a mediocre bond be created, but this is not sufficient for a long life card. This can be remedied by coextruding PA with PC (i.e. a connection in the melt). But even this combination of the two materials in the molten state is not sufficient to ensure safe long-term stability.

This can also be remedied by an intermediate layer, which acts as an adhesive layer between the PC and the PA. Only polymers that can withstand the high extrusion temperatures of PC and PA and have similar melt viscosities can be used as the adhesion promoter layer.

For this come u. a. the following polymers in question: anhydride- or acid-functional homo- or copolymers of ethylene and / or acrylates as well as styrene-maleic anhydride copolymers and the like. However, there are also disadvantages in the production of the films.

It is easier to use a polyether block amide formulation that does not require adhesion promoter layers. This has the advantage that it is easier and cheaper to produce the product. You only need one coextruder with two instead of three extruders. You only need two raw materials and their control in production instead of three.

It is therefore an object of the present invention to propose a method for providing a layer arrangement which makes it possible that no adhesion promoter layer has to be used and is also suitable for forming a flexible area which functions as a so-called hinge area of a book-shaped value document.

It is also an object of the present invention to propose a device which carries out the proposed method, as well as a data page and a value document with the feature of the proposed layer arrangement. It is also an object of the present invention to provide a computer program product with control commands that execute the method or operate the device.

The object is achieved with the features of patent claim 1. Further advantageous configurations are specified in the subclaims.

Accordingly, a method for providing a layer arrangement for stably inserting a data page into a document of value is proposed, comprising molding at least one outer layer comprising polycarbonate, molding at least one inner layer, which comprises a composition which contains at least one polyether block amide wherein the at least one outer layer and the at least one inner layer are co-extruded, the shaped layers being permanently connected by means of setting co-extrusion parameters. Here, the person skilled in the art recognizes that the individual method steps in some cases have further sub-steps and can be carried out simultaneously. For example, the first molding and the second molding can be carried out by coextruding and adjusting the coextrusion parameters accordingly.

Thus, a layer arrangement or a multilayer film is therefore proposed in the present case. According to the invention, the following multilayer film is provided:

Multi-layer film produced by coextrusion, composed of a) at least one outer layer A, consisting of a polycarbonate or a mixture of PC and thermoplastic elastomers TPE plus the usual processing aids, stabilizers and additives b) at least one inner layer C containing a composition comprising at least one polyether block amide,

c) optimally an intermediate layer B containing a composition comprising at least one polyether block amide.

Polyether block amide has the advantage that the inner layer is particularly advantageous because it is flexible but nevertheless stable and can therefore be used particularly as a hinge area for a data page.

Because the outer layers are made of PC, the same printing and laminating processes can be used as with PC. The film properties of A and C can be used to influence the film properties. H. the thinner the layer A, the more flexible the film becomes. The properties of the film can also be changed by the recipes of the layers. That is, e.g. B. A blend of PC + TPE in the A-layer also increases the elasticity. The elasticity values can also be changed by selecting the PEBA in the C layer. A specially developed formulation of the PEBA component ensures a sufficiently good bond between the PC and PEBA layers.

Coextrusion parameters are, for example, the regulation of a temperature development when melting granules in such a way that the individual layers can be shaped. To provide the individual layers, a starting material is typically provided, which is melted in a coextruder and liquefied in such a way that it can be pressed through a mold and the liquefied starting material is coextruded into a layer arrangement. It can thus be provided according to the invention that the coextrusion parameters describe which zones of a coextruder are heated to what extent. For example, a coextruder has different areas which, according to the invention, can be subjected to heat differently. Areas can thus be created within a co-extruder that have different levels of heat. This makes it possible according to the invention that a layer of polycarbonate and polyamide can also be formed, which is provided as a layer arrangement. The proposed layer arrangement can thus also simply be referred to as a layer or a film which has polycarbonate and polyether block amide. This is possible because the polycarbonate having at least one outer layer and the polyether block amide having at least one inner layer bond to one another in such a way that they adhere to one another. This layer arrangement or this film can then directly form the data page or can form the data page in cooperation with other layers. It is particularly advantageous here that the proposed layer arrangement is flexible but not brittle, so that this layer arrangement does not only provide one layer, but rather that this layer arrangement provides an area that can act as a hinge area.

According to the invention, it is preferred that the proposed layer arrangement corresponds approximately to the size of a book page of the value document or is somewhat larger than a book page, so that the flexible area protrudes from the data page. Thus, by means of the flexible area that is created by the present layer arrangement, the data page can be inserted into the value document in a flexible and scrollable manner. In this case, however, it is also possible to design the proposed layer arrangement in such a way that it forms two data pages of a value document and can thus be inserted into the value document in the middle of a fold in such a way that the proposed layer arrangement represents two sides of the value document.

The value document is generally a book-like value document which has a data page which consists of the layer arrangement alone or the layer arrangement together with further layers. The document of value is therefore preferably a passport book, the person skilled in the art also being familiar with other documents of value which are book-like.

According to the invention, it was surprisingly recognized that, contrary to the known hurdles, polycarbonate and polyether block amide can be combined in such a way that they can be connected solely by setting the coextrusion parameters. As already described, setting coextrusion parameters in accordance with one aspect of the present invention includes controlling the extruder in such a way that different heat ranges for melting and pressing the starting material. The setting of coextrusion parameters can, however, also be carried out in such a way that a certain mixing ratio between polycarbonate and polyether block amide is provided in such a way that the corresponding granulate can be provided according to the mixing ratio. Thus, at least two foils or layers are provided and co-extruded at the same time in such a way that a single layer arrangement is created. The person skilled in the art recognizes here that further layers can be provided, in particular it is optionally possible to separate between the layers To arrange the inner layer and the at least one outer layer at least one further layer.

The outer layer can, for example, be designed as a protective layer or can also act as a carrier for a further protective layer. Thus, the present layer arrangement is not to be understood as final, or the proposed layer arrangement can have further layers, such that the layer arrangement is only provided as a starting product for a further laminate. According to the invention, it is thus possible to connect the layer arrangement provided with other foils and, if necessary, to press them hot.

The present layer arrangement is particularly stable in a value document, since the combination of polycarbonate and polyether block amide is particularly advantageous in the present application scenario. Thus, the proposed connection has the required flexibility, which makes it possible to turn a data page, as well as a certain robustness, which makes it possible to provide a stable document of value which is not damaged even if the data page is turned many times.

The shaping of the at least one outer layer, comprising polycarbonate, and the shaping of the at least one inner layer, having a composition comprising polyether block amide, is carried out according to the invention by means of coextrusion in such a way that the two layers are permanently bonded. The proposed outer layer and the inner layer can thus be referred to as partial layers of a film which forms a data page or at least part of the data page. It is particularly advantageous here that the layer arrangement created is strengthened by means of further layers, the outer layer comprising polycarbonate also being able to be varied in such a thickness that an advantageous rigidity of the outer layer is achieved. For this purpose, there is the inner layer, which can be flexibly introduced into a value document or connected to it. According to the invention, it is therefore possible for the data page to be provided by means of the inner layer and the outer layer, or for other layers to be provided in addition to the inner layer and the outer layer, which provide the data side.

The outer layer has polycarbonate, which can also mean that it has a mixture of polycarbonate with other thermoplastic elastomers TPE. In addition, other processing aids, stabilizers and additives can be used. The inner layer comprises a composition containing polyether block amide. The polyether blockamide-containing composition may further contain polyamides. Optionally, a further intermediate layer can be arranged between the inner layer and the outer layer, which has polyether block amide.

Polyether block amides (PEBA) are block copolymers which are obtained by polycondensation of polyamides, in particular acid-regulated polyamides, with alcohol- or amine-terminated polyethers. Acid-regulated polyamides have an excess of carboxylic acid end groups. The person skilled in the art refers to the polyamide blocks as hard blocks and the polyether blocks as soft blocks.

Suitable polyamides (PA) in PEBA are selected, for example, from PA6, PA66, PA11, PA12, PA613, PA610, PA612, PA106, PA1012, PA1010, PA 1013. They can be prepared from lactams or w-aminocarboxylic acids or from the reaction of diamines with dicarboxylic acids.

Suitable polyether diols are, for example, 1,4-butanediol, 1,3-butanediol, 1,3-propanediol or ethylene glycol. Mixed polyether diol blocks with statistical or block-wise distribution can also be used. They generally have a number average molecular weight of approximately 230 to 4000.

Suitable polyether diamines can be obtained by converting the corresponding polyether diols by reductive amination or coupling to acrylonitrile with subsequent hydrogenation (for example EP-A-0434244; EP-A-0296852). They generally have a number average molecular weight of approximately 230 to 4000. Commercially available polyether diamines starting from propylene glycol are commercially available as Elastamine® from Huntsman (for example Elastamine RP405, RP2005, RE900, RE2003, RTP 542).

The proportion of polyether in the PEBA is preferably at least 35% by weight, preferably at least 40% by weight and particularly preferably at least 50% by weight, in each case based on the total weight of PEBA. It is preferred that the polyether not exceed 70% by weight.

Suitable PEBAs can have a Shore hardness D of 20 to 50, preferably 30 to 45. The Shore hardness D is measured according to ISO 868.

The composition comprising at least one polyether block amide preferably further comprises at least one amine-regulated polyamide. This has amino end groups. The combination of polyether block amide and amine-regulated polyamide shows particularly good adhesion to polycarbonate. Suitable amine-regulated polyamides are, for example selected from PA6, PA66, PA610, PA88, PA612, PA810, RA108, PA9, PA613, PA614, PA812, PA128, PA1010, PA10, PA814, PA148, PA1012, PA11, PA1014, PA1212 and PA12. Mixtures of different polyamides can also be used, provided they are sufficiently compatible. Compatible polyamide combinations are known to the person skilled in the art; For example, the combination PA6 / PA66, PA12 / PA1012, PA12 / PA1212, PA612 / PA12, PA613 / PA12, PA1014 / PA12 and PA610 / PA12 as well as corresponding combinations with PA11 are listed here. In case of doubt, compatible combinations can be determined through routine tests. Copolyamides based thereon can also be used.

The amine-regulated polyamide preferably has an excess of 20 to 600 mmol of amino end groups per kg of polyamide, preferably 100 to 400 mmol / kg and particularly preferably 150 to 350 mmol / kg. Amine-regulated polyamides are described, for example, in EP-A-1642923. Amine-regulated polyamide can be produced from a combination of diamine and dicarboxylic acid, from a w-aminocarboxylic acid or the corresponding lactam.

According to one aspect of the present invention, the layer arrangement is laminated together with further foils in a further method step. This has the advantage that further layers or foils can be introduced which are necessary for the provision of a data page. Either protective layers or layers that can be personalized can be introduced. In particular, the rigidity of the data side can thus also be set, since further layers can be laminated on that have polycarbonate. According to a further aspect of the present invention, the layer arrangement is introduced into a value document in such a way that the coextruded layers represent a hinge area. This has the advantage that at least some of the coextruded layers can protrude from the data page in such a way that this protruding area can be connected to the value document in such a way that the data page can be turned over within the value document. The hinge area is present as a flexible area that can be easily bent or that introduces the layer arrangement into the value document in such a flexible manner that the layer arrangement can be bent or turned within the value document without destruction.

According to a further aspect of the present invention, the layer arrangement is stiffened by means of further layers. This has the advantage that not only can the data side be provided by the choice of the individual layer thicknesses, but rather layers can be provided around the proposed layer arrangement, for example in a so-called sandwich arrangement, which the layers a - Protect the arrangement and impart such rigidity to the layer arrangement that the data side is designed to be stable per se and only the layer arrangement is flexible at those points at which the layer arrangement is introduced into the value document.

According to a further aspect of the present invention, the layer arrangement is introduced into a value document, and the layers are shaped such that they essentially have the area of the value document. This has the advantage that the proposed layer arrangement essentially has the area of a data page and thus either provides a data page per se, or together with it provides a data page for further layers. In this case, a disadvantage of the prior art is overcome, namely that an effect on further layers is to be feared at a point at which a fabric band is introduced into the value document, which is overcome according to the invention in that the proposed layer arrangement or film extends over the entire area of the data page. This is known as a so-called swim-off effect.

According to a further aspect of the invention, starting materials undergo different heat phases before coextruding, depending on the set coextrusion parameters. This has the advantage that it is ensured by means of such coextrusion parameters that the polyether block amides bond with the polycarbonate and thus a permanent layer model can be provided. Thus, the coextrusion parameters are individual values by means of which the starting materials can be heated in certain areas. However, this can also be a mixing ratio between polyether block amide and polycarbonate.

According to a further aspect of the present invention, an outer layer with a thickness of 5-0.0 mm and an inner layer with a thickness of 60-80 mm are formed. This has the advantage that, for example with a layer thickness of 100 mm, a particularly advantageous layer arrangement is created, the outer layer and an optional intermediate layer being made as thin as possible. It is advantageous here that the intermediate layer and the inner layer have different materials and the intermediate layer is 5 to 10 mm thick. Here, however, it is also possible for the intermediate layer and the inner layer to be produced from the same material, and thus the thickness ratios of less relevance. The intermediate layer is optionally arranged between the outer layer and the inner layer.

The object is also achieved by a device for providing a layer arrangement for the stable introduction of a data page into a document of value, comprising a means configured to form at least one outer layer, comprising a polycarbonate, another means configured to form at least one inner layer , comprising a composition comprising at least one polyether block amide, a coextrusion device being provided for coextruding the at least one outer layer and the at least one inner layer, the shaped layers being permanently connected by means of setting coextrusion parameters.

The object is also achieved by a layer arrangement for the stable introduction of a data page into a document of value, having at least one outer layer, having polycarbonate, at least one inner layer, having a composition comprising at least one polyether block amide, the at least one outer layer and the at least one inner layer is co-extruded, the shaped layers being permanently connected by setting co-extrusion parameters. The result of the setting of coextrusion parameters can be seen in the end product in such a way that the two layers are connected with polycarbonate and polyether block amide in such a way that they form a single film. This film is then available as the proposed layer model or the proposed layer arrangement.

The object is also achieved by a data page for incorporation in a value document, having a layer arrangement as proposed will. Furthermore, the task is solved by a document of value, comprising a data page. In addition, the object is achieved by a computer program product with control commands which execute the method according to the aspects described or operate the proposed device.

According to the invention, it is particularly advantageous that the proposed method has method steps which can be simulated as structural features of the device. Furthermore, the method can be carried out by means of the structural features of the device. Furthermore, structural features of the proposed layer arrangement can be provided by means of the method. Thus, all process steps in the proposed layer arrangement can be provided in such a way that the features of the method correspond to structural features of the layer arrangement. Furthermore, the proposed device is suitable for providing the layer model.

Further advantageous embodiments are explained in more detail with the aid of the attached figures. Show it:

1 shows a cross section through a layer arrangement according to an aspect of the present invention;

2A: a layer model or a data page as a starting point for the present invention;

2B: a data page in cross section according to an aspect of the present invention; 3A: an apparatus or a coextruder according to an aspect of the present invention;

3B: a further device or a coextruder for providing a layer arrangement according to a further aspect of the present invention; and

4: shows a schematic flowchart of a method for providing a layer arrangement for the stable introduction of a data page into a value document according to a further aspect of the present invention.

1 shows a layer arrangement according to the invention, having at least one outer layer A, having polycarbonate, at least one inner layer C, having a composition comprising at least one polyether block amide, the at least one outer layer A and the at least one inner layer C being co-extruded, wherein by means of a Setting coextrusion parameters that form layers A and C, and optionally B, are permanently connected. In the present example, the optional intermediate layer B is provided, which is always arranged between an inner layer C and an outer layer A.

2A indicates by means of the arrow that the so-called swim-off effect arises at the point where the fabric tape ends due to the lamination under pressure and temperature. In the present case, a fabric tape is provided in accordance with conventional methods, which is suitable for inserting the data page into a value document. For this purpose, an upper polycarbonate (PC) layer is provided, which is designed to be transparent, and underneath a second polycarbonate (PC) layer, which is designed to be opaque. Consequently it is therefore a data page that has a conventional structure and has a data layer and a transparent protective layer. The so-called Fabric Tape FT is used to insert the data page into the value document. Here, the fabric tape FT is encased in a sandwich arrangement on the data side.

In contrast to this, FIG. 2B shows the film according to the invention, which consists of polyether block amide PEBA and polycarbonate PC. Here, the film is arranged in the center and surrounded by further films. The film is laminated as part of the structure. This does not represent a foreign body, but on the contrary reinforces the structure even further and acts as a hinge for sewing into the value document. In the present case, the middle of the five layers is the layer arrangement according to the contribution according to the invention. The size of this central film is chosen in such a way that it approximately corresponds to the size of the value document or stands beyond it. Thus, it essentially has the area of the other layers. In this case, the person skilled in the art recognizes that the feature with respect to the area of the layer arrangement is “essentially” immediately optional and can therefore be deleted. It should only be noted here that the layer arrangement corresponds approximately to the other layers, so that it can be introduced over the entire surface into the further layers. Thus, this structure differs from the structure as shown in FIG. 2A. Thus, according to the invention, the so-called swim-off effect is avoided. Thus, according to FIG. 2B, the disadvantage does not occur as indicated in FIG. 2A, namely that there is a fear of an effect of the fabric tape FT on the two surrounding layers. This is shown in the present case by the two curved arrows, which cause the adjacent layers to thicken the data page at one point. According to the invention, the following advantages arise in production. This prevents the fabric tape from being inserted by hand. The expensive printing of the fabric tape from roll to roll is no longer necessary. The polyether block amide polycarbonate film can be processed like an ordinary polycarbonate film in production in an automated process. The current process comprises laminating sheets with inlays for data page production, which can be used unchanged according to the invention. In so-called continuous production systems, the process unit for the hinge application is eliminated, which in turn represents a cost saving.

By adapting the polyether block amide formulation and using suitable process parameters in the production of the film, an adhesion promoter layer between polycarbonate and polyether block amide is no longer necessary. H. the intermediate layer is optional or can be used for other purposes.

3A shows the device according to the invention for providing a layer arrangement, which in the present case is designed as an extruder. In this case, three extruder units are provided which have different zones Z1-Z5, by means of which the starting materials are melted. This is therefore an application of the so-called coextrusion parameters. In the present case, an optional intermediate layer is introduced, which can be provided by means of the lower extruder. The upper extruder can, for example, provide the outer layer A and the middle extruder the inner layer C. Furthermore, a so-called feed block and a die unit are arranged in the center. For example, the following coextrusion parameters are particularly advantageous, or heat development in the individual zones, as shown in FIG. 3A: Extruder for outer layer A:

• Feed zone: 100 ° C

• Second zone: 265 ° C

• Third zone: 270 ° C

• Fourth zone: 275 ° C

• Fifth zone: 280 ° C

• Adapter zone: 280 ° C

• Feed block: 245 ° C

• The zone 245 ° C

Layer B extruder:

• Feed zone: 80 ° C

• Second zone: 235 ° C

• Third zone: 235 ° C

• Fourth zone: 235 ° C

• Fifth zone: 235 ° C

• Adapter zone: 240 ° C

• Feed block: 245 ° C

• The zone 245 ° C

Layer C extruder:

• Feed zone: 80 ° C

• Second zone: 235 ° C

• Third zone: 240 ° C

• Fourth zone: 240 ° C

• Fifth zone: 240 ° C

• Adapter zone: 240 ° C

• Feed block: 245 ° C

• The zone 245 ° C These values have proven to be particularly advantageous and ensure that the inner layer C, which has a composition comprising a polyether block amide, can be particularly suitable combined with the outer layer A, which has a polycarbonate. The coextrusion can thus be carried out in a particularly advantageous manner.

3B shows an analog device and shows an extruder for the outer layer A at the top and an extruder for the inner layer C at the bottom. As already explained, the optional layer is not to be provided here, and it is therefore sufficient to provide two extruders instead of the one three extruders which would be necessary according to the state of the art.

The person skilled in the art recognizes that the individual zones Z1-Z5 are adjusted with regard to their heat by means of the coextrusion parameters. The examples listed above are particularly advantageous because, surprisingly, the proposed layer arrangement can be provided particularly well and the corresponding layer arrangement provides the required features of a flexible region which is nevertheless stable.

The person skilled in the art also recognizes that the examples mentioned above are only for demonstration purposes and in no way have to be understood as restrictive. Rather, the expert can only use the value of the first zone to the fifth zone. The feed zone is the first zone Z1. The second zone is designated Z2, etc. until Zone 5, which is designated Z5. FIG. 4 shows a schematic diagram of a method for providing a layer arrangement for the stable introduction of a data page into a document of value, having a molding 100 of at least one outer layer A, having polycarbonate PC, a molding 101 of at least one inner layer C, having polyether block amide PEBA , wherein a coextrusion 102 of the at least one outer layer and the at least one inner layer C is provided, the formed 100, 101 layers A, C being permanently connected by means of creating 102A of coextrusion parameters. It is also provided that the layer arrangement is laminated together with further foils in a further method step 103. The person skilled in the art recognizes that the method steps can be carried out iteratively and / or in a different order. In particular, it is possible to mold the individual layers simultaneously and to do this by means of coextrusion.

Example

The compatibility of the polymers to be used according to the invention, polycarbonate (PC) and polyether block amide (PEBA), was investigated. For this purpose, a mixture of an inner layer (C) and polycarbonate was laminated together as an outer layer (A).

Laminating conditions

Laminator: Bürkle CHKRV 50/100

Heat:

Temperature: 175 ° C

Pressure: 210 bar

Time: 26 minutes

Cool:

Temperature: 25 ° C

Pressure: 160 bar

Time: 16 minutes

The adhesion of the layer arrangements obtained was then examined. For this purpose, the composite was measured according to FCD ISO / IEC 10373-1: 2005-05.

Materials used

a - VESTAMID E40 (Evonik): polyether ester amide with PA12 hard block and polytetrahydofuran, polyether content approx. 50% by weight; Shore D hardness: 40. b - VESTAMID L1600 nf 9.004 (Evonik): Amine-regulated PA12 with an excess of amino end groups of approx. 120 mmol / kg and a relative solution viscosity 1.6. c - VESTAMID Z9029 (Evonik): Amine-regulated PA12 with an excess of amino end groups of approx. 300 mmol / kg and a rel. Solution viscosity 1.3.

d - VESTAMID ZA7295 (Evonik): Amine-regulated PA12 with an excess of amino end groups of approx. 50 mmol / kg and one with rel. Solution viscosity 2.1.

e - VESTAMID L2101 (Evonik): Acid-regulated PA12 with an excess of carboxylic acid groups of approx. 50 mmol / kg and one with rel. Solution viscosity 2.1.

POLYCARBONATE: Triseo CALIBER 201-06 (Dow Chemical / Styron):

A layer arrangement consisting of PC and a mixture of PEBA a and amine-regulated polyamide b or c (Examples 1 and 2) show good or very good adhesion to one another. The higher proportion of amino end groups in polyamide c has a positive effect on the adhesion. The sole use of PEBA a without amine-regulated polyamide b shows at least satisfactory adhesion (example 3). A mixture of PEBA a and acid-regulated polyamide e (comparative example 2) does not result in any adhesion to PC layers, just as amine-regulated polyamide b (comparative example 3) or a mixture of different amine-regulated polyamides d + c (comparative example 1).

Claims

1. A method for providing a layer arrangement for the stable introduction of a data page into a value document, comprising:

Molding (100) at least one outer layer (A) comprising polycarbonate (PC);

Forming (101) at least one inner layer (C) comprising a composition comprising at least polyether block amide (PEBA), characterized in that coextrusion (102) of the at least one outer layer (A) and the at least one inner layer (C) is provided , wherein the formed (100, 101) layers (A, C) are permanently connected by means of setting (102A) coextrusion parameters.

2. The method according to claim 1, characterized in that the layer arrangement is laminated together with further foils in a further method step (103).

3. The method according to claim 1 or 2, characterized in that the layer arrangement is introduced into a value document such that the coextruded layers (A, C) represent a hinge area.

4. The method according to any one of the preceding claims, characterized in that the layer arrangement is stiffened by means of further layers.

5. The method according to any one of the preceding claims, characterized in that the layer arrangement is introduced into a value document and the layers (A, C) are shaped in this way (100, 101) that they essentially have the area of the value document.

6. The method according to any one of the preceding claims, characterized in that before the coextrusion (102), starting materials undergo different heat phases depending on the set coextrusion parameters.

7. The method according to any one of the preceding claims, characterized in that an outer layer (A) with a thickness of 5 to 10 mm and an inner layer (C) with a thickness of 60 to 80 mm is formed.

8. The method according to any one of the preceding claims, characterized in that the composition of the at least one inner layer (C) further contains at least one amine-regulated polyamide (PA).

9. The method according to claim 8, characterized in that the amine-regulated polyamide (PA) contains 20 to 600 mmol / kg, preferably 100 to 150 mmol / kg, preferably 150 to 350 mmol / kg amino end groups.

10. The method according to any one of the preceding claims, characterized in that the proportion of polyether in the PEBA is at least 35% by weight, preferably at least 40% by weight, preferably at least 50% by weight, based in each case on the Total weight of PEBA.

11. The method according to any one of the preceding claims, characterized in that the PEBA has a Shore hardness D of 20 to 50, preferably 35 to 45.

12. Device for providing a layer arrangement for the stable introduction of a data page into a value document, comprising:

a device set up for molding (100) at least one outer layer (A) comprising polycarbonate (PC);

a further means set up for molding (101) at least one inner layer (C) having at least one polyether block amide (PEBA), characterized in that a coextrusion device is set up for coextruding (102) the at least one outer layer (A) and the at least one at least one inner layer (C) is provided, the formed (100, 101) layers (A, C) being permanently connected by means of setting (102A) coextrusion parameters.

13. Layer arrangement for the stable introduction of a data page into a value document, comprising:

- At least one outer layer (A) comprising polycarbonate

(PC);

at least one inner layer (C) comprising polyether block amide (PEBA), characterized in that

the at least one outer layer (A) and the at least one inner layer (C) are coextruded, the formed (100, 101) layers (A, C) being permanently connected by means of setting (102A) coextrusion parameters.

14. Data page for incorporation in a document of value having a layer arrangement according to claim 11.

15. document of value comprising a data page according to claim 12.

16. Computer program product with control commands which execute the method according to one of claims 1 to 9 when they are executed on a computer.