DE102017001361A1 - Customizable media - Google Patents

Abstract

The present invention is directed to a method for manufacturing a card body, which u. a. can be personalized particularly advantageous by means of suitable additives by means of a laser engraving. The present invention is further directed to a suitably designed card body and to an apparatus for producing the card body. Furthermore, a computer program product is proposed with control commands which implement the proposed method or operate the proposed device.

Description

The present invention is directed to a method for manufacturing a card body, which u. a. can be personalized particularly advantageous by means of suitable additives by means of a laser engraving. The present invention is further directed to a suitably designed card body and to an apparatus for producing the card body. Furthermore, a computer program product is proposed with control commands which implement the proposed method or operate the proposed device.

DE 10 2013 017 927 A1 shows a method for producing a film of a renewable material. For this purpose, a crystalline or an amorphous material can be used. Furthermore, a laser additive is shown as well as a so-called masterbatch.

DE 10 2014 203 080 A1 shows a preparation of a polymer layer, wherein, inter alia, a metal oxide is used. Here, the metal oxides serve as metallic effect pigments.

DE 10 2014 204 552 A1 shows an antenna track, which is produced by means of a conductive paste, wherein the conductive paste comprises a conductive metal oxide.

DE 19822024 A1 shows a chip card, wherein a metal oxide semiconductor is used.

EP 1 918 123 A1 shows a data carrier comprising a dye layer and a metal oxide layer.

Laminated card bodies, for example a smartcard, are known from the prior art, which are provided from a film stack. For this purpose, several films are superimposed and hot laminated under pressure. This results in a card body, which ultimately provides the basic form of a credit card. In this case, more electrical or electronic components are typically used. For example, an induction coil is needed, which both takes over the data communication and induces a current that serves the power supply of a chip or microcontroller. It is known to use a metal oxide, since this is electrically conductive. Thus, therefore, such antennas can be provided by means of metal oxides, or it can be realized conductive layers in the card body.

Generally, it is known to provide a laser engraving, by means of which card body can be customized. In particular in the field of value documents, such a laser engraving serves as a security element which introduces a pattern into the card body that can be verified. In addition, if necessary, simply creating an aesthetic effect, such that a certain desired pattern is introduced into the card body.

In such a known laser engraving, however, it is disadvantageous that not all materials of a card body are equally suitable for such a laser engraving. Thus, especially with a security feature, it must be ensured that exactly the desired pattern is actually introduced into the card body. Thus, during a laser engraving, a heat development, which could affect the surrounding material. In some cases, the energy of a laser has to be set very high, as some materials absorb energy poorly and thus have to be treated separately.

Thus, it is an object of the present invention to provide a method for producing a card body, which makes it possible with little technical effort to introduce a desired pattern as accurately as possible in a film layer of the card body. A small technical effort should mean that existing production processes do not have to be changed if possible. Furthermore, it is an object of the present invention to provide a correspondingly configured device and a card body itself. Furthermore, it is an object of the present invention to provide a computer program product with control commands which implement the proposed method or operate the proposed device.

The object is achieved by a method for producing a card body with the features of claim 1. Further advantageous embodiments are specified in the dependent claims.

Accordingly, a method for producing a card body is proposed, comprising providing at least one film, personalizing the provided film by means of a laser engraving, wherein for optimized personalization at least one metal oxide is introduced into the film.

The card body is specifically a card body of a card-shaped data carrier. Thus, therefore, the card body can essentially provide a credit card to itself. In this case, electrical or electronic components are typically introduced into the card body. This can be done in such a way that the method step of providing at least one film is carried out iteratively, such that a Film pile is created, in which the electronic components are inserted. After a hot lamination of the plurality of films, the multilayer card body thus arises. However, according to the invention it is also possible to provide a card body consisting of only one film. In this case, further carrier substrates can be used, to which the provided film is applied.

Furthermore, personalization of the film provided by means of a laser engraving, which can already be carried out such that at least one introduced metal oxide can be considered. Thus, for example, the metal oxide itself or its quantity and granularity can be used, and the laser can be adjusted accordingly. Thus, the metal oxide per se is generally suitable for altering the underlying carrier of the film layer so that it is precisely this film that is more or less susceptible to laser engraving. This means that depending on the quantity and granularity or the selection of the metal oxide, the laser intensity can be tuned to this. If the material underlying the film is highly absorbent, then the laser beam can also be set to be weaker. On the other hand, if the underlying carrier material is designed to be only slightly absorbent by means of the additive, then a stronger laser beam may be necessary.

Thus, a feedback between the step of providing the metal oxide and the laser engraving is proposed. Thus, it can be accomplished that the desired image or the desired pattern can actually be introduced cleanly into the card body or at least one film.

The personalization of the provided film can be done at a stage where the film has not yet been laminated together with other films, but can also be done using the finished card body. In a laser engraving is generally the introduction of a point high energy such that at least one material of the film carbonized. This can be done in such a way that the additive per se carbonizes by means of heat and turns black, or else that the additive absorbs heat and carbonizes a material surrounding the additive by means of heat radiation. This results in a black or at least grayish color. Both the resulting image and the process of lasing are referred to as laser engraving.

The optimized personalization is caused in such a way that by means of the metal oxide used, the film or the card body can be personalized in the desired manner. Thus, the metal oxide is selected such that a verifiable security element, for example a pattern, is formed. The corresponding pattern, which is produced by means of the laser engraving and the introduced metal oxide, can then be verified in a finished end product, and it can be determined whether the color pattern corresponds to the color pattern intended for this purpose. This makes it more difficult for a copycat to actually provide the desired pattern since it can not provide the metal oxide exactly in terms of quantity, granularity and material per se. For this purpose, complex procedures would be necessary to determine and rework the corresponding properties of the metal oxide or metal oxides used. Thus, therefore, a further security element is realized in a particularly advantageous manner.

According to the invention, it has been recognized that metal oxides are particularly suitable as a laser additive, and in particular that they are to be selected such that they do not scatter but absorb laser light. It may thus be possible for the person skilled in the art generally to provide metal oxides, but not to arrange or select them in such an advantageous manner that they improve laser engraving. Thus, metal oxides are known in the provision of further components within a chip card, these other components, such as an antenna, are not provided by means of a laser engraving. In this case, therefore, the at least one metal oxide is selected such that it cooperates particularly advantageously with personalization. Thus, personalization, in particular lasering, is thus optimized by means of the introduced metal oxide.

An optimization does not necessarily have to be the provision of a particularly fine laser engraving, but rather any quality of the laser engraving can be brought about by means of the metal oxides, wherein it is merely necessary to ensure that the desired quality is actually verifiable in the end product. Thus, in turn, a security feature is provided, which in addition can be designed aesthetically particularly appealing.

According to one aspect of the present invention, the metal oxide is substantially nanoscale. This has the advantage that the metal oxide can be provided in such a fine granular form that it brings about the desired technical effect, namely that a high-contrast coloring sets in the finished end product. In this case, it has been found according to the invention that such a granularity enables a particularly advantageous engraving. According to the prior art, it is only known to use metal oxides, for example in conductive pastes in coarser granularity.

According to another aspect of the present invention, the metal oxide is present in a size range between 1 and 100 nm. This has the advantage that a particularly advantageous size range is provided, and that, for example, different particle sizes can also be used. For example, it is possible to use multiple metal oxides and to provide a first metal oxide, for example, in a particle size of 10 nm and to provide a particle size of 90 nm according to a second metal oxide. In this case, it has surprisingly been found that such an order of magnitude has a particularly advantageous effect, particularly in the area of the card bodies or credit cards. This is the case because individual layers in the micrometer range are thick and thus the proposed size range causes a particularly attractive laser engraving even in such a thin layer.

According to another aspect of the present invention, the metal oxide is provided as a laser additive for optimized personalization. This has the advantage that the personalization can be carried out depending on the laser additive, and in particular that the laser engraving can be adjusted so that the properties of the metal oxide used can be taken into account. Thus, overall properties of the laser can take into account the choice of metal oxide, the amount and / or the granularity. Thus, a particularly optimized personalization process is achieved without further work steps would have to be changed in this case.

According to a further aspect of the present invention, the metal oxide is present as TiN, tungsten oxide compound, molybdenum oxide compound, copper oxide compound, copper phosphate oxide or copper oxide compound. This has the advantage that these nanoscale metal oxides develop a particularly advantageous effect and in this case a particularly advantageous personalization is possible. Furthermore, it is also possible to use different metal oxides and in this case to use a combination of the metal oxides described.

According to a further aspect of the present invention, the at least one film comprises polylactides PLA, polyvinyl chloride PVC, polycarbonate PC, a mixture of polycarbonate PC and polyethylene terephthalate glycol PETG, wherein the mixture of PC and PETG is referred to as PEC, and / or a polymer. This has the advantage that the film can be made according to different materials, which were partly due to their properties without application of the present invention were not suitable for a fine laser engraving, but which can be inventively extended such that an optimized personalization is now actually possible ,

According to a further aspect of the present invention, the at least one film has a plastic matrix. This has the advantage that the film can be stabilized by means of the plastic matrix, wherein in particular a laser-doped plastic matrix is advantageous. Doping is the introduction of substances into a base material, which is preferably carried out in such a way as to optimize the possibility of lasing in the base material. This is therefore a so-called laser sensitization of the base material from which the film is provided. A plastic matrix is an arrangement of the molecular chains of the respective polymer or of the polymer blend. The chains can be arranged differently depending on the polymer, for example, they can form an amorphous or partially crystalline structure. In this case, a so-called semi-crystalline polymer can arise.

According to a further aspect of the present invention, the plastic matrix is introduced in such a way that the film is stabilized. This has the advantage that the provided film is designed to be particularly stable for laser engraving, so that the temperature effect by means of laser engraving causes no further damage to the film itself.

According to another aspect of the present invention, transparent outer layers are attached to the card body. This has the advantage that the resulting pattern or the resulting laser engraving is visible from outside and is still protected. It is also possible to provide a laser-doped layer with a laser engraving by means of a transparent outer layer by means of a suitable wavelength. Furthermore, it is also possible to provide a transparent laser-doped outer layer itself. Furthermore, a transparent laser-doped overlay foil can be arranged above it.

According to another aspect of the present invention, the card body is made of a plurality of provided films by lamination. This has the advantage that several layers can be provided, which are then laminated to a card body. In this case, it is possible to match the lamination process as a function of the introduced metal oxides, since individual layers comprising the metal oxides behave differently under the influence of temperature than untreated layers. Thus, so the heat exposure during lamination can be regulated depending on the introduced metal oxides.

According to another aspect of the present invention, at least one opaque film is provided. This has the advantage that such an opaque film can be extruded, for example, and can be made from PLA, and furthermore can have a thin, transparent, laser-doped outer layer. This is very efficient with respect to laser engraving, especially in combination with a transparent laser-doped overlay film.

According to another aspect of the present invention, at least one layer provided is laser doped. This has the advantage that even several layers can be laser doped, and so a laser engraving is possible through several layers away. In this case, it is possible to introduce the laser engraving into the individual foils per se, without these being already laminated to form a foil stack.

The object is also achieved by a card body, comprising at least one provided film, at least one personalization of the provided film, brought about by means of a laser engraving, wherein for optimized personalization at least one metal oxide is introduced into the film.

The object is also achieved by a device for producing a card body, comprising a delivery unit, configured to provide at least one film, a personalization unit, configured for personalizing the provided film by means of a laser engraving, wherein for optimized personalization at least one metal oxide is introduced into the film.

The object is also achieved by a computer program product having control commands which implement the proposed method or operate the proposed device.

In this case, it is particularly advantageous that the method provides structural features which are present in the card body. Furthermore, units are operated by means of the proposed method steps, in which the proposed devices are included. Thus, the method for manufacturing the card body implies structural features of the card body, and the method or the individual method steps can be implemented by means of the device for producing the card body.

• 1: ein möglicher Folienaufbau bzw. Schichtenaufbau gemäß einem Aspekt der vorliegenden Erfindung;
• 2: ein weiterer vorteilhafter Folienaufbau bzw. Schichtenaufbau gemäß einem weiteren Aspekt der vorliegenden Erfindung;
• 3: ein weiterer vorteilhafter Folienaufbau bzw. Schichtenaufbau gemäß einem weiteren Aspekt der vorliegenden Erfindung;
• 4: eine Monofolie gemäß einem Aspekt der vorliegenden Erfindung;
• 5: ein Kartenaufbau aufweisend mehrere Folien gemäß einem Aspekt der vorliegenden Erfindung;
• 6: ein weiterer Kartenaufbau aufweisend weitere Folien gemäß einem weiteren Aspekt der vorliegenden Erfindung;
• 7: eine laserbare PLA-Karte gemäß einem Aspekt der vorliegenden Erfindung; und
• 8: ein schematisches Ablaufdiagramm eines Verfahrens zur Herstellung eines Kartenkörpers gemäß einem Aspekt der vorliegenden Erfindung.

Further advantageous embodiments will be explained in more detail with reference to the accompanying figures. Show it:

• 1 a possible film construction according to one aspect of the present invention;
• 2 a further advantageous film structure or layer structure according to a further aspect of the present invention;
• 3 a further advantageous film structure or layer structure according to a further aspect of the present invention;
• 4 a monofilm according to one aspect of the present invention;
• 5 A card assembly comprising a plurality of films according to one aspect of the present invention;
• 6 Fig. 1: another card structure comprising further films according to another aspect of the present invention;
• 7 a lasable PLA card according to one aspect of the present invention; and
• 8th Fig. 3 is a schematic flow diagram of a method of manufacturing a card body according to one aspect of the present invention.

The 1 to 6 propose exemplary film assemblies or card structures, as they can be achieved according to the proposed method or may be provided in the proposed card body.

Plastics do not absorb laser radiation in the range of near ultraviolet to near infrared light. An implementation of the laser energy in (melting) heat is therefore only possible if the polymer was "laser-sensitized" by the addition of an additive. Without a laser additive, plastics can therefore only be processed in far-ultraviolet light, eg with excimer lasers and in far-infrared light, eg with CO ₂ lasers. Cards made from renewable raw materials, in particular PLA cards, are currently produced from semi-crystalline or combinations of amorphous and semi-crystalline materials. This is necessary in order to be able to meet the temperature stability requirements (crystalline) and at the same time be able to process the films (laminating, printing, etc.). This requires the amorphous part. Semi-crystalline polymers can also be badly lasered with laser additives, because the resulting heat in the material causes the PLA to crystallize increasingly and counteract blackening (crystalline materials become lighter). In addition, the very low glass transition range of PLA (about 55 ° C) causes an early transition to the thermoelastic or thermoplastic state of the material, which additionally counteracts clean carbonation / blackening. Therefore, even with PLA, the laser additive soot does not work, because it heats the material by absorbing the laser energy, but this does not produce a clean blackening in the PLA by the secondary carbonization reaction in the PLA. In addition, uniform distribution of the additives is more difficult with semicrystalline materials than with amorphous materials.

According to the invention, the use of nanoscale metal oxides, which because of their small particle size do not scatter the light, but absorb the wavelength of the laser in the near infrared range (NIR) proposed. Likewise, so-called laser-active additives such as the "FABULASE® 361" Fa. Budenheim can be used. In addition, however, the PLA must be stabilized via another introduced plastic matrix which is also laser doped, i. Use of materials with high glass transition area, which are amorphous so as not to degrade the transparency. However, both materials (PLA and laser-improve polymer) must be homogenized cleanly in a masterbatch, along with the laser additive. Only then can this MB be used to produce a homogeneous, laserable PLA film of good quality.

A film according to the invention is produced, for example, by means of a co-extruder with at least two single-screw extruders and a chill roll or calender roll mill. Temperature and material throughput are relevant for the process, so that the material or the film according to the invention does not thermally degrade. By thermally degrading the term, it is meant that if a molten material remains in the extruder for too long, then the molecular chains are shortened, thus degrading the material properties. The film according to the invention should have a residual moisture of less than 20 ppm. Furthermore, the roll temperatures of the chill-roll and calender roll mill affect the crystallinity of the film. This means that the higher the respective roll temperature, the higher the crystallinity of the film.

Proposed, according to one aspect of the present invention, is a use of nanoscale metal oxides (eg TiN, tungsten oxide compounds or molybdenum oxide compounds, eg copper-molybdenum oxide, copper-phosphate-oxide or copper-oxide compounds in general ). The additive FABULASE® 361 has also proven to be particularly advantageous. This is a so-called laser active pigment. In addition, according to one aspect of the present invention, the PLA must be stabilized via another introduced plastic matrix which is also laser doped. In one aspect, polycarbonate has been proven to have an average melt mass flow rate (about 10-22 g / 10 min at 300 ° C / 1.2 kg). However, both materials (PLA and Laser Improve Polymer = PC) must, according to one aspect of the present invention, be homogenized cleanly in a masterbatch together with the laser additive. The masterbatch is prepared by a twin-screw extruder (standard production). Crucial, in one aspect of the present invention, is the ratio of PLA to PC in the masterbatch. As favorable, a PC share of 35-75%, has been found to be particularly favorable from 50-65%. By means of the melt mass flow rate of the PC and the proportion in the PLA, the dispersion of the two plastics can be optimally adjusted and thus also the dispersion of the laser additive in the masterbatch can be guaranteed. Of course, according to one aspect of the present invention, in the master batch manufacturing process, the temperature must also be adjusted according to the proportion of PC, i. high PC content approx. 260-290 ° C low PC content, approx. 240-260 ° C.

The film production is carried out, according to one aspect of the present invention, with a standard extrusion process (mono or coex). The masterbatch is added in a concentration of 5-15% in the extrusion of the film (transp.) In the recipe ( 8th -12% preferred). Of course, the usual additives, such as impact modifier, color modifier, release and antiblock and process additives can be added. Another embodiment is an opaque coex film of PLA, which thin, transp. Having laser doped outer layers. This is very efficient, especially in combination with a transparent laser-doped overlay film.

If the masterbatch is not well dispersed, or if it does not disperse well into the film formulation, then the laser becomes poorer and the film becomes cloudier.

The dispersibility in this case depends on the melt mass flow rate of the PC and the ratio of PC to PLA in the masterbatch. Nevertheless, an excessive addition of the masterbatch can lead to a clouding of the transparency.

In the present exemplary embodiments, nanoscale means that the particle size is between 1 nm and 100 nm. The finer the pigments are designed, the better the resolution in laser personalization. Active laser additives blacken themselves, ie they absorb the laser energy in order to discolor it. This can be black, for example, but can also be colored monochrome. Non-active laser additives absorb the laser energy, heat up and thereby carbonize the surrounding plastic matrix. PLA is the so-called polylactide acid. Here, the stabilization takes place in that the PC lays around the PLA chains with its polymer chains and thermally stabilizes them. One Masterbatch is a highly concentrated granulate with additives needed for each application. In this case these are the laser additives. Only a small amount of the masterbatch is added to the base material, whereby PLA can be the base material here. The homogenization is carried out by means of twin-screw extruder.

• 1 zeigt einen möglichen Folienaufbau bei einer 3-Schicht-Coexfolie, wobei alle Schichten laserdotiert und transparent ausgestaltet sind.
• 2 zeigt einen möglichen Folienaufbau einer 3-Schicht-Coexfolie, die opak ausgestaltet ist.
• 3 zeigt einen weiteren möglichen Folienaufbau einer 5-Schicht-Coexfolie, die opak ausgestaltet ist.
• 4 zeigt eine Monofolie, also eine Folie, die lediglich aus einer Schicht bereitgestellt wird.
• 5 zeigt einen Kartenaufbau einer laserbaren PLA-Karte. Dieser Aufbau hat den Vorteil, dass der opake Bereich dicker ist. Dies ist bei Chipkarten mit großer Dicke des Chipmoduls von Vorteil.
• 6 zeigt einen weiteren Kartenaufbau, ebenfalls mit Overlayfolien. Dieser Aufbau hat den Vorteil, dass man zwei laserdotierte Schichten kombinieren kann. Dies erhöht zusätzlich den Kontrast bzw. die Schwärzung. Dabei kann man gleiche Laseradditive mit unterschiedlichen Konzentrationen verwenden. Die Overlayfolie muss hierbei immer niedriger dotiert sein als die transparente Schicht auf der opaken Folie. Hierbei kann man auch unterschiedliche Laseradditive kombinieren.
• 7 zeigt auf der linken Seite ein gut dispergiertes Laser-sensitives Additiv und auf der rechten Seite ein aggregiertes Laser-sensitives Additiv, welches schlecht für die Laserung ist. Somit wird also eine Dispergiergüte gezeigt, und insbesondere wird der Zusammenhang zwischen der Lasergravur und des verwendeten Additivs bzw. des Metalloxids gezeigt.
• 8 zeigt in einem schematischen Ablaufdiagramm ein Verfahren zur Herstellung eines Kartenkörpers, aufweisend ein Bereitstellen 100 mindestens einer Folie, ein Personalisieren 101 der bereitgestellten Folie mittels einer Lasergravur, wobei zur optimierten Personalisierung mindestens ein Metalloxid in die Folie eingebracht 100A wird.

Furthermore, other materials may be considered as suitable nanoscale metal oxides in addition to the listed materials. These are the materials that have a maximum absorption spectrum at 1064 nm. A melt volume flow rate MVR, Melt Volume-Flow Rate, is a characterization of the flow behavior of a thermoplastic under certain pressure conditions or temperature conditions. Dispersion means a uniform distribution of the laser additives in the entire volume of the layer. A high PC content, at about 260-290 ° C, and a low PC content, for example at about 240-260 ° C, affects the process temperature. If the PC share is higher, you need a higher process temperature than with less PC.

• 1 shows a possible film structure in a 3-layer coex film, wherein all layers are doped laser and transparent.
• 2 shows a possible film structure of a 3-layer coex film, which is designed opaque.
• 3 shows another possible film structure of a 5-layer coex film, which is designed opaque.
• 4 shows a monofilm, ie a film which is provided only by a layer.
• 5 shows a card structure of a laserable PLA card. This structure has the advantage that the opaque area is thicker. This is advantageous for chip cards with a large thickness of the chip module.
• 6 shows another card structure, also with overlay foils. This construction has the advantage that it is possible to combine two laser-doped layers. This additionally increases the contrast or the blackening. You can use the same laser additives with different concentrations. The overlay film must always be doped lower than the transparent layer on the opaque film. Here you can also combine different laser additives.
• 7 shows on the left side a well-dispersed laser-sensitive additive and on the right side an aggregated laser-sensitive additive, which is bad for the laser. Thus, a dispersing quality is shown, and in particular the relationship between the laser engraving and the additive or the metal oxide used is shown.
• 8th shows in a schematic flow diagram a method for producing a card body, comprising providing 100 at least one slide, one personalize 101 the provided film by means of a laser engraving, wherein for optimized personalization at least one metal oxide is introduced into the film 100A.

Conventional laser additives, eg. As soot, cause in PLA as good as no blackening, d. H. the contrast is so weak that no personalization can be checked. Thus, it is proposed to use metal oxides in a range of 1 nm to 100 nm particle size, which does not scatter but absorb laser light. In addition, PLA is stabilized with a laser-doped plastic matrix. Thus, according to the invention, the laser personalization is verifiable, d. H. the blackening can be seen with a clear contrast. Thus, lasable films made of PVC, PC, PEC or polyester can be produced.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102013017927 A1 [0002]
• DE 102014203080 A1 [0003]
• DE 102014204552 A1 [0004]
• DE 19822024 A1 [0005]
• EP 1918123 A1 [0006]

Claims (15)

Method for producing a card body, comprising: - providing (100) at least one film, - personalizing (101) the provided film by means of a laser engraving, characterized in that for optimized personalization at least one metal oxide is introduced into the film (100A). Method according to Claim 1 , characterized in that the metal oxide is substantially nanoscale. Method according to Claim 1 or 2 , characterized in that the metal oxide is present in a size range of a particle size between 1 and 100 nanometers. Method according to one of the preceding claims, characterized in that the metal oxide is provided as a laser additive for optimized personalization. Method according to one of the preceding claims, characterized in that the metal oxide as TiN, tungsten oxide compound, molybdenum oxide compound, copper compound oxide, copper oxide or phosphate-copper-oxide compound is present. Method according to one of the preceding claims, characterized in that the at least one film polylactides PLA, polyvinyl chloride PVC, polycarbonate PC, a mixture of polycarbonate PC and polyethylene terephthalate glycol PETG and / or a polymer. Method according to one of the preceding claims, characterized in that the at least one film has a plastic matrix. Method according to Claim 7 , characterized in that the plastic matrix is introduced in such a way that the film is stabilized. Method according to one of the preceding claims, characterized in that transparent outer layers are attached to the card body. Method according to one of the preceding claims, characterized in that the card body is produced from a plurality of provided (100) films by means of lamination. Method according to one of the preceding claims, characterized in that at least one opaque film is provided (100). Method according to one of the preceding claims, characterized in that at least one provided (100) layer is laser doped. Card body, comprising: - at least one provided (100) film, - at least one personalization (101) of the provided film, brought about by means of a laser engraving, characterized in that for optimized personalization at least one metal oxide introduced into the film (100A). A device for producing a card body, comprising: a delivery unit configured to provide at least one film, a personalization unit configured to personalize the provided film by means of a laser engraving, characterized in that for optimized personalization at least one metal oxide in the film is incorporated (100A). Computer program product with control instructions, which method according to one of Claims 1 to 12 to implement.

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