METHOD OF MANUFACTURING A DATA CARRIER MULTILAYER SECURITY INDICIA

The invention relates to a method for producing a multilayer data carrier by hot lamination and under pressure a plurality of superposed layers comprising at least an outer layer of at least one thermoplastic material, said multilayer data carrier indicia, said security indicia. It extends to the data carrier thus obtained coating, to the use thereof for manufacturing an official document, and to an official document thus obtained.

The official documents are documents that, due to their nature and/or rights that they can provide, are to be protected against the falsification and/or counterfeiting and/or to ensure authentication and/or to ensure their integrity (i.e. in that they have not been altered or modified). Which may include passports, visas, identity cards, driver's license, gray cards, loyalty cards, bank cards, bank checks, diplomas, certificates, tickets, access control cards, badges, labels, legal procedures, contracts, legal registers, cadastral planes, trust documents, banknotes, planes and other planes... Official Documents carry indicia, such as indicia personalization variables (name, first name, address, photo, signature... holder or parts...) and/or common indicia (patterns security, matrices, frames, field names, seals, holograms, signatures, values, ...).

In all of the text, the term "visible" qualifies any electromagnetic radiation which the spectral composition is situated in the wavelength spectrum human visible, i.e. in the wavelengths between 400 nm and 800 nm. In the total text, designated "ultraviolet short" light of wavelength shorter than 300 nm, in particular of Twist of 250 nm-. In the total text, designated "long ultraviolet" non-visible light wavelength of greater than 300 nm, in particular of Twist of 365 nm-.

In the total text, designated "inscription" any sign or pattern formed on a layer of a document, human readable and/or by machine (OCR), at least under certain conditions (in particular in normal light into visible light; and/or in specific illumination; and/or after activation of an electronic device (screen) or other...) -Which may include indicia personalization variables (name, civil status, photograph, value, dates...) some other document or common indicia and/or security; text (or handwriting printed characters); code (ASCII, codes universal with optoelectronic reading such as bar codes...); drawings, of pictures or photographs; of tasks or patches... The official documents comprises indicia, said security indicia, for preventing or rendering very complex their reproduction or forgeries. These security indicia may be visible in the visible range by the naked eye (first level security); or of the type which can be controlled using a specific device such as an ultraviolet lamp (second level security); or of the type which can be controlled only in a certified laboratory (safety of third level).

In the total text, a surface is called glossy when it has a gloss white light 85 degrees (angle of incidence of the light), for example measured by BYK-degree meter GARDNER, greater than 50% ; a surface is called non-glossy when it has a gloss white light 85 degrees less than 50% ; said surface is a matte when it has a gloss white light 85 degrees less than 30%. When the layers are applied by printing, in particular by screen printing or flexography, brightness is related to a condition of surface. Therefore, a surface is brighter when its state is less rough surface. Brightness and opacity of a surface can thus be evaluated by measurements of roughness.

In the total text, designated "transfer" any operation is applied to a surface at least a pattern carried by a film and transferring each pattern on the surface by contact of the film and of each pattern on the surface and adhesion of each pattern on the surface, followed by separation of the film with respect to each pattern and to the surface. A pattern that such transfer operation is designated "transferable" pattern.

In the total text, designated "optically variable effect" write any producing optical configurations-especially but not exclusively in the visible range-(e.g., different colours or different tone) that vary according to the viewing directions of the labeling. The value can be made with indicia iridescent pigments and/or interference, or with inks or other liquid crystal.

In the total text, "paper" denotes any sheet obtained by the wet route using a suspension of natural cellulose fibers and/or mineral fibres and/or vegetable fibres and/or polymeric synthetic fibers other than cellulose, that may include various fillers and additives such as used in paper making. Expression "synthetic paper" denotes any paper comprising polymeric synthetic fibers other than cellulose.

In the total text, designated "relief" any form projecting or recessed from a surface.

In the total text, designated "varnish" any cured solid composition resulting from a liquid curable composition; the term thus encompasses the conventional air-curing varnish or otherwise (ultraviolet, polymerization, ...), the inks, lacquers, the paint, resins... Is designated by "varnish composition" any liquid composition and curable Version for material after curing. Is designated by "printing" any method of applying a composition to the curable liquid state (i.e. for material), in particular a liquid ink, or an ink to sec, on one side of a solid substrate.

In all of the text, the expression "at least substantially" indicates, in a usual manner, that a characteristic, structural or functional, is not to be taken as marking an abrupt discontinuity, which has not physical direction, but covers not only that structure or this function, but also the slight variation in the structure or function that produce, in the technical field considered, an effect of the same nature, otherwise same degree. Furthermore, the expressions "comprising/comprising a (e)" are synonymous with "comprising/comprising at least one (e)".

Many official documents, such as bank cards, identification cards, driver's license, access cards to individual sites or by a common carrier, sheets of passport, customs plug, certificates, trust documents, banknotes... media are formed multilayer data obtained by hot lamination (temperature typically of the order of 150 °C to 200 °C) and pressure (typically of the order of 10⁶ Pa to 2.10⁶ Pa) with a plurality of layers of thermoplastic material, in particular polycarbonate, further material having many advantages in such applications (stiffness, durability, easy and reliable markings (indicia variables, safety appliques...), possibility of markings by laser radiation...)-.

On industrial point of view, it is important to be able to produce these data carriers in large series, by incorporating therein all indicia of safety for the mi nation to heat and pressure and by avoiding multiple successive steps and the use of complex and expensive tools. Or, the possibilities with respect to the security indicia with the data carriers produced by hot lamination and under pressure are li mi mounted by more constraints:

-when the security indicia are performed before the lamination under heat and pressure, they must themselves be resistant to the hot lamination and under pressure and not affecting its result;

-it is possible to realize certain security indicia during the lamination under heat and pressure, using die plates and/or suitable embossing; but also that this is possible only for certain types of security indicia, this option requires the manufacture of extremely expensive plates specific for each series of security indicia to perform; further the patterns that can be made are relatively coarse, and easily reproducible by counterfeiters.

In particular, security indicia such as relief patterns having different brightnesses; holographic patterns;

varnish metallized patterns; or photoluminescent patterns under illumination by light from the visible range, cannot today be integrated with the data carriers multi-layer thermoplastic material by hot lamination and pressure under economical conditions compatible with a operating on an industrial scale.

More particularly, it is not known incorporate patterns are invisible under visible light illumination photoluminescent under illumination by ultraviolet short for data carriers multi-layer thermoplastic material by hot lamination and pressure. Indeed, the thermoplastic materials constituting the multilayer data carriers such as polycarbonate or PVC are not short ultraviolet-transparent, and the simply printing, for example in screen printing, such dividing wall surface of a multilayer data carrier does not provide sufficient resistance to the mechanical stress (the patterns can be easily removed by simple abrasion). Also, it is unclear applying printing an ink at the surface of a multilayer data carrier reflective metallized patterns sufficiently resistant to mechanical stress.

In this context, the aim of the invention is generally to provide a method of manufacturing that incorporate various security indicia in a multilayer data carrier material laminate thermoplastic under heat and pressure, including relief patterns having different brightnesses; holographic patterns; varnish metallized patterns and/or reflecting (mirror); photoluminescent patterns under illumination by light from the visible range-such as dividing wall under illumination by ultraviolet short-, and in economic conditions compatible with a operating on an industrial scale.

It is also intended to provide such a production method that is compatible with the methods of lamination under heat and pressure of such data carriers, which does not require the manufacture of tools and does not impose specific complexes many further steps of pre-or post-lamination under heat and pressure of the different layers constituting the data carriers.

To this end, the invention relates to a method for producing a multilayer data carrier by hot lamination and under pressure a plurality of superposed layers comprising at least an outer layer of at least one thermoplastic material, said multilayer data carrier indicia, said security indicia,

characterized in that:

choosing at least one marking film:

o adapted to hot lamination and pressure, marking said lamination, with a layer, said layer to be marked, thermoplastic material of said plurality of superimposed layers forming the data carrier, said layer to be marked is coated with the marking film, lamination in said marking,

o comprising a face, said contact face, bearing inscriptions vitrophanie corresponding to said security indicia, and adapted to mark said layer to be marked following a lamination of marking the marking film and of said layer to be marked, said contact face and said lettering vitrophanie being in contact with said layer to be marked,

o adapted to be separated from said layer to be marked after a lamination of marking, the security indicia being formed on said layer to be marked,

-producing a lamination of marking at least one marking layer coated with such a marking film, said lettering vitrophanie being in contact with said layer to be marked,

-then separating the marking film of said layer to be marked, the latter having said security indicia.

While a hot lamination process and under pressure a plurality of layers, at least a portion of which is formed of at least one thermoplastic material is necessarily considered driving a perfect fusion of the different thermoplastic layers to each other, the main advantage, the inventors have surprisingly determined that it is possible to provide a marking film can be superimposed with a thermoplastic and be a lamination of marking with the at least one thermoplastic layer, and then a separation of the thermoplastic layer, to provide a marking on this layer, marking which allows the incorporation of various security indicia in a multilayer data carrier the mi to heat and pressure.

Even more surprising, the inventors have determined that it is possible to incorporate such a marking film separable as outermost layer of the stack of said plurality of thermoplastic layers superimposed to which the hot lamination and pressure is applied for manufacturing the multilayer data carrier. Therefore, a method according to an embodiment of the invention is also advantageously characterized in that the layer to be marked is an outermost layer of said plurality of superimposed layers, to form a free end face of the multilayer data carrier, and in that said lamination of marking is said lamination under heat and pressure of said plurality of superimposed layers, the marking film disposed in contact with the layer to be marked during the lamination under heat and pressure, said free end face of the support carrying said security indicia after said lamination under heat and pressure.

Of course, nothing prevents operation of several marking films for manufacturing a single multilayer data carrier, for example a marking film to mark each outermost layer forming the exposed side of the multilayer data carrier and/or a marking film to incorporate security indicia on a layer to be marked within the thickness of the multilayer data carrier. In the latter alternative, the marking lamination must be performed before said lamination under heat and pressure of said plurality of superimposed layers for obtaining the multilayer data carrier, the layer to be marked having undergone the lamination marking, and thus carrying security indicia, then being incorporated in the stack used in making the hot lamination and pressure of different layers forming the stack constituting the multilayer data carrier.

Therefore, in one embodiment of the invention, which may be combined with the preceding, a lamination of the marking is performed before said mi nation to heat and pressure of said plurality of superimposed layers, the layer to be marked is labeled with said security indicia and integral with said plurality of superposed layers before performing said lamination under heat and pressure of said plurality of superimposed layers.

The marking film can be many embodiments, in that the aforementioned criteria are met, in other words on the one hand that it resists marking lamination of the layer to be marked, on the other hand that it can carry inscriptions vitrophanie for incorporating indicia to be marked on said layer, and that it can then be separated from this layer to marking marking after lamination. The marking film is selected from a suitable material based on the layer to be marked. Furthermore, it is also selected to provide inscriptions vitrophanie on the marking film easily and economically, for example by printing at least one layer of varnish and/or ink, in particular by screen printing or flexographic, or other.

In some advantageous embodiments and according to the invention, use of such a marking film for forming irregularities (fingerprints) as security indicia. Therefore, advantageously and according to the invention, is selected marking film exhibiting, as lettering vitrophanie , relief patterns in vitrophanie corresponding to security indicia formed of relief patterns.

Such a marking film patterned relief vitrophanie embossing may be performed any number of ways, as with laser etching, embossing, printing a varnish composition... Advantageously and according to the invention, a marking film is selected having a face, said contact face, carrying said relief patterns in vitrophanie formed by printing a varnish to the contact face, said contact face and is selected to that said patterns relief vitrophanie remain integral with the marking film after lamination marking and separation of the marking film and of said layer to be marked. Is selected and the material constituting the marking film and that of the varnish composition used for forming irregularities in vitrophanie embossing such that the raised features in vitrophanie embossing remain integral with the marking film. In particular, advantageously and according to the invention, the surface micromachining varnish imprint with a composition of drying lacquers ultraviolet comprising at least one adhesion promoting agent of the glaze to said contact face.

Furthermore, advantageously and according to the invention, the relief patterns are chosen from in vitrophanie relief patterns printed on the contact face with said varnish, and raised features embossed surface layer of said lacquer printed on the contact face.

A marking film with such relief patterns in vitrophanie embossing is a film die (or punching) that can be used to carry out different types of security indicia, and in particular the entries contain of different brightnesses (for preventing reproduction by optical scanning) for example with relief patterns formed of a glossy varnish printed on the contact face of a marking film matte, or with relief patterns formed of mat varnish printed on glossy the contact face of a marking film, or a glossy varnish printed solid on the contact face of the marking film and wherein are embossed indicia obscured, or a matte varnish printed solid on the contact face of the marking film and wherein indicia are embossed bright... Therefore, advantageously and according to the invention, the relief patterns in vitrophanie are selected from relief patterns having at least two different surface properties respectively corresponding to at least two different values of brightness of said security indicia, and patterns vitrophanie relief adapted to form at least a holographic pattern.

A marking film with such relief patterns in vitrophanie may also be used for forming at least one holographic pattern.

Therefore, advantageously and according to the invention, is selected marking film exhibiting, as lettering vitrophanie , at least one print varnish adapted to be transferred by said lamination layer of marking on said marking, said lettering vitrophanie transferred constituting said security indicia.

Therefore, with such a marking film separable patterned relief vitrophanie it is especially possible in a single stage of be the hot lamination and under pressure of different component layers of the multilayer data carrier, form security indicia made of relief patterns and/or having different brightnesses and/or holographic on at least one of the free end faces of the multilayer data carrier.

In these variations, advantageously and according to the invention, said marking film can be formed of a polyester film coated with a layer adapted to be embossed (for example by rolling through one or more cylinder (s) of holographic embossing or non-holographic) to form holographic relief patterns or non-holographic, which is constituting the marking film (i.e. associated with the polyester film the continuous production), or applied by printing on such a solid polyester film. In particular, may be used directly, as marking film, a film capable of being stamped previously manufactured, for example a film as sold under the reference "UV cast" by the ITW Covid company Security Group Inc. ( Cranbury , USA). It is in particular that such polyester films or "UV cast" meet the criteria mentioned above with respect to the marking film. They are particularly advantageous when the layer to be marked is a layer of polycarbonate or PVC.

Therefore, advantageously and according to the invention, each layer of said plurality of superimposed layers is formed of at least one material selected from the group of thermoplastic polycarbonates, of PVC, synthetic papers, mixtures thereof, and combinations thereof, is selected and a marking film polyester. Of course, other embodiments are possible.

Furthermore, in some embodiments of the invention, a marking film is used to perform security indicia by transferring the lettering vitrophanie on the layer to be marked during marking said lamination, especially during said lamination under heat and pressure of said plurality of superimposed layers for making the multilayer data carrier. Therefore, advantageously and according to the invention, is selected marking film exhibiting, as lettering vitrophanie , at least one print varnish adapted to be transferred by said lamination layer of marking on said marking, said lettering vitrophanie transferred constituting said security indicia.

It is found totally surprising effect on the one hand that it is possible to transfer indicia initially by a marking film on said layer to be marked, i.e. on a layer of said plurality of superimposed layers, either during a prior step of lamination for marking at least one layer to be marked, either during same of said lamination under heat and pressure of the plurality of layers, that the markings transferred in this way is of excellent quality and have a high resistance to mechanical stress, in particular to abrasion, the varnish transferred if incorporating on the depth in the thickness of the layer to be marked.

Therefore, can be performed in a single step, not only the hot lamination and under pressure of different component layers of the multilayer data carrier, but also by a simple method of transferring, security indicia on at least one of the free end faces of the multilayer data carrier.

Surprisingly, the inventors have found that this embodiment of a method according to the invention in a single step makes it possible in particular to form on a multilayer data carrier security indicia photoluminescent under illumination by ultraviolet short that are resistant to abrasion.

More generally, the security indicia thus formed with such a marking film can be selected from the group consisting of the patterns photoluminescent, fluorescent patterns, patterns photochromic, thermochromic patterns, patterns optically variable effect (iridescent, interference, or other), soluble dye patterns, patterns soluble binder, holographic patterns and metallized patterns and/or reflecting (i.e. formed of at least one printing ink providing a metallic effect, and/or reflecting and/or incorporating metal particles and/or a metallic layer, colored or not).

In particular security indicia thus formed by transfer include photoluminescent indicia under illumination by light from the visible range-including listings photoluminescent under illumination by ultraviolet, in particular ultraviolet short-. Photoluminescent Such indicia can be advantageously at least substantially invisible under illumination in the visible range.

Therefore, advantageously and according to the invention, at least one print varnish is selected from a printing a metallized printing lacquer and varnish photoluminescent under illumination by light from the visible range, in particular in the ultraviolet, in particular ultraviolet short-.

Also, security indicia thus formed by transfer include indicia reflective metallized which also exhibit a surprising feature of Excellent transfer on the layer to be marked.

Therefore, advantageously and according to the invention, at least one print of varnish is formed with an ink composition reflective, metallized.

It is understood that the various embodiments of the present invention may be combined. In particular, it is possible to use a same marking film comprising units relief vitrophanie embossing and indicia of varnish transferable, marking film constituting both a film die and a transfer film.

The invention extends to a multilayer data carrier indicia, said security indicia, formed of a plurality of superimposed layers laminated to each other comprising at least one external layer of at least one thermoplastic material, characterized in that it has been manufactured by a method according to the invention. In particular, the invention relates to a multilayer data carrier indicia, said security indicia, formed of a plurality of superimposed layers and laminated to each other, comprising at least one layer of at least one thermoplastic material, characterized in that it comprises security indicia selected from relief patterns having different brightnesses; holographic patterns; metallized patterns and/or reflective; and photoluminescent patterns under illumination by light from the visible range, in particular in the ultraviolet, in particular ultraviolet short-. In particular, the invention relates to a multilayer data carrier of thermoplastic material.

Advantageously and according to the invention, each layer of said plurality of superimposed layers is formed of at least one material selected from the group of thermoplastic polycarbonates, of PVC, synthetic papers, their mixtures and their associations (passports covers for example).

Furthermore, advantageously a data carrier according to some embodiments of the invention present security indicia formed on at least one of its faces free outer.

The invention also extends to an official document comprising at least one multilayer data carrier according to the invention. Official A document according to the invention may in particular be selected from the group consisting of passports, sheets of passport, customs plugs, visas, identity cards, driver's licenses, vehicle license cards (cards grey), bank cards, loyalty cards, bank checks, degree, certificates, transport tickets, access control cards, badges, labels, legal procedures, contracts, legal registers, cadastral planes, security documents, bank notes, packaging, and manufacturing planes.

The invention also relates to a method of manufacturing, a multilayer data carrier and an official document characterized in combination by some or all of the characteristics mentioned above or below.

Other purposes, features and advantages of the invention shall become apparent from the following description given as non-limiting and that refers to the appended Figures in which:

-figure 1 is a graph illustrating, in cross-section, a lamination step under heat and pressure of a stack of layers in a method according to the invention,

-figure 2 is a graph illustrating, in cross-section, a step of separating the marking film of a method according to one embodiment of the invention,

-figure 3 is a schematic plan illustrating an exemplary inventive data carrier with security indicia having different brightnesses,

-figure 4 is a graph illustrating an alternative manner of manufacture for a marking film for use in a method according to the invention,

figure 5-is a schema illustrating an exemplary inventive data carrier with holographic security indicia,

figure 6-is a graph illustrating, in cross-section, a step of separating the marking film of a method according to one embodiment of the invention.

On Figures, the scales and the relative dimensions are not complied with, for illustration. In particular, the thicknesses of which are unduly enlarged.

Figure 1 is an example of a hot lamination pressure and a stack 11 formed of a plurality of layers superimposed 12 of thermoplastic material, such as polycarbonate or PVC, four in number in the example. The stack 11 superimposed layers 12 has two end faces 15, 16 formed by the last layers of the stack 11, and which are intended to form, after lamination under heat and pressure, the two outer free faces 17, 18 of the support 19 multilayer data obtained.

In the embodiment of Figure 1, the process enables security indicia thereon outer free 17, 18 of the support 19 multilayer data. For this purpose, a marking film 20, 21 is respectively applied on each of the two end faces 15, 16 last layer, said layers 12a to be marked, of the stack 11.

Each marking film 20, 21 comprises a film 24 polyester having a face, said face contact 23, on which patterns 22 raised (projecting) embossing are printed with a varnish composition selected to be adhering to the contact face 23 of the polyester film (even if further separation of the marking film 20, 21), be compatible with the conditions of the hot lamination pressure and the stack 11 subsequently implementation, and allow the marking by embossing of the end faces 15, 16 layers to be marked 12a of the stack 11. Advantageously, a composition is used of acrylic lacquer ultraviolet curable incorporating 1% to 10%, especially 4 to 6% of an adhesion promoting agent, for example as sold under the reference by the VFP company UV290 (Saint Christol the Alès, France).

The marking by embossing, therefore, provides security indicia which are units 25 relief (recessed) on the faces 17, 18 free end of the support 19 multilayer data. The patterns 22 raised embossing of the marking film 20, 21 are patterns vitrophanie (symmetrical seen in a mirror) and negative with regard to the patterns 25 relief component security indicia on the support 19 multilayer data.

For example, use is made of a polyester film 24, the thickness of which is between 36 and 500 pm pm, and is carried out the patterns 22 raised embossing with a composition of drying lacquers ultraviolet printed with a thickness of between 5 and 50 pm pm. The marking films 20, 21 are therefore, in this embodiment, films die dimples by embossing in the end faces 15, 16 layers 12a to be marked during the lamination process to heat and pressure.

These patterns 22 are discontinuous raised embossing i.e. do not cover the entire face of contact 23 of the polyester film. It enables in particular patterns 25 having different brightnesses states. For example, use is made of a polyester film 24 whose face 23 and contact mat, and a composition of glossy varnish for printing patterns 22 raised embossing glossy on this face contact 23.

In the method of lamination under heat and pressure, the stack 11 of each marking film coated 20, 21 is arranged between the platens 13, 14 of a heating press lamination, and subjected to one or more step (s) compression to high temperature, for example under the following conditions:

-an initial duration of 1 minute to 5 minutes to rise to a temperature of between 150 and 200 °C ° C;

-a first step and the compression temperature reached for a period of between 5 minutes and 30 minutes under a first pressure value, such as between 20 N/cm² n and 50/cm² ;

-a second step compression at the same temperature for a period of between 1 minute and 30 minutes under a second pressure value, such as between 100 N/cm² n and 200/cm² ;

-a step of cooling to room temperature under a third pressure value, preferably greater than the second pressure value, such as between 150 N/cm² n and 200/cm² .

After the lamination under heat and pressure of the different layers 12 constituting the multilayer data carrier with the two marking films 20, 21, the two marking films 20, 21 can be separated, in particular by simply peeling it off manual, faces 15, 16 layers 12 to be marked as shown in Figure 2. The patterns 22 raised embossing each marking film 20, 21 remain attached to the latter.

The patterns 25 relief formed on the faces 17, 18 of the support 19 free multilayer data are hollow portions corresponding to the portions raised patterns 22 raised embossing marking films 20, 21. These hollow portions have a base 26 having the same surface state, and therefore the same brilliance condition that the portions raised, that is say that the lacquer used to print the patterns 22 raised embossing. The other parts 27 faces 17, 18 outer free have a surface state corresponding to that of the contact face 23 of the marking film 20, 21. Therefore, when using a glossy varnish printed on a matte contact face 23, the bottom 26 of the hollow portions is gloss while the other parts 27 are dull. In case is used a matte varnish printed on a contact face 23 glossy, the bottom 26 of the hollow portions will be mat while the other parts 27 will be bright.

This embodiment makes it possible in particular to obtain security indicia having a sharp contrast between the bright portions and the portions obscured, that may be very fine and complex, and economically, simple, fast. Furthermore, these security indicia patterned relief 25 provide a touch to the support surface 19 multilayer data.

In variant represented figure 4, the marking films 20, 21 patterned relief 34 (projecting) embossing are formed not by printing these embossing patterns directly on a contact face of a polyester film, but by embossing of a coat of varnish. For this purpose, printing (printing station 30) continuously solid a layer 29 ultraviolet drying lacquer on a polyester film 28. The printing solid is partially cured past a drying station 31 ultraviolet low energy. The film is then embossed by an embossing cylinder 32 producing imprints in the thickness of the layer of varnish 29 thereby forming the patterns 34 raised embossing. The varnish is then finally cured under a second station 33 drying ultraviolet high-energy.

An example of a lacquer that can be used for forming the layer of stampable varnish 29 is a mixture of 10% of a silicone poly ether acrylate and 90% of a ultraviolet curable ink. The polyester film may be a film as sold under the reference "UV cast" by the ITW Covid company Security Group Inc. ( Cranbury , USA).

A film of mark thus produced can be used exactly in the same way as in the preceding embodiment. The patterns 34 relief vitrophanie embossing while being with a fineness even greater, for example with a width and a thickness of between 10 and 30 pm pm, in particular of the order of 20 pm. In particular, the patterns 34 raised embossing may be holographic patterns in vitrophanie. Such patterns 34 relief holographic vitrophanie produce, after lamination under heat and pressure, relief patterns 35 holographic (stamping recessed) on the faces 17, 18 of the support 19 multilayer data, as shown in Figure 5.

In variant represented figure 6, films are used marking 36, 37 which are not films swaging, but instead of the transfer films, i.e. carrying indicia printed in sticker for using a varnish composition selected such that it transfer to the layer to be marked 12a of the stack 11 when the lamination operation under heat and pressure of the stack 11 coated on both marking films 36, 37. Figure 6 represents only the step of separation by peeling marking films 36, 37. As seen, the indicia 38 initially carried by the marking films 36, 37 separate from these marking film 36, 37 when peeling, remain integral with the layers 12a to be marked, and are therefore transferred on the exposed side 17, 18 of the support 19 multilayer data.

This security indicia 38 very various types, including listings photoluminescent under illumination by light outside the domain visible and invisible under illumination in the visible range. More particularly, can be formed on the support 19 thermoplastic multilayer data photoluminescent indicia under illumination by ultraviolet short.

EXAMPLE 1:

On a polyester film thickness mat 75pm treated to promote adhesion sold under the reference® MTDE STABIPHANE by the company NORMANDY COATING , (Arques the battle, France;

htt p:// www.iiormandv-coating.eom/fr/Les~produits/mates.htmlh are printed in screen printing (120 mesh) letters as shown in Figure 3 with a composition of ultraviolet curing lacquer marketed under the reference series® UV 391 Uvibond by the company SERICOL (Security screw fastening, France), mixed with 5% of an adhesion promoter sold under the reference by the VFP company UV290 (Saint Christol the Alès, France).

Is applied such a marking film on each of the two faces of a stack of polycarbonate sheets how shown in Figure 1, in other words: a sheet of transparent polycarbonate pm 50 ; a sheet of transparent polycarbonate pm 100 ; a sheet of white polycarbonate pm 400 ; a sheet of transparent polycarbonate pm 100 ; a sheet of transparent polycarbonate pm 50.

The set of sheets forming the stack is the mi born in a lamination press under the following conditions:

-1 mi n to rise to 180 °C

-12 min to 180 °C in 35 N/cm²

-5 min in 140 to 180 °C N/cm²

cooling during 17-20 °C mi n/n sub 140 cm² .

Can then be separated by peeling the two manual marking films. The letters printed with the lacquer curable to the polyester film remain attached to the latter. A data carrier is obtained in the form of a card whose total thickness is equal to the sum of the thicknesses of the polycarbonate sheets used decreased by about 10%. The data carrier is provided on its outer faces and bright contrasting patterns mats, the bright patterns being recessed corresponding to letters, as shown in Figure 3.

EXAMPLE 2:

A holographic pattern by embossing, holographic with a cylinder, of a film as sold under the reference "UV cast" by the ITW Covid company Security Group Inc. ( Cranbury , USA).

Is applied such a marking film on each of the two faces of a stack of polycarbonate sheets, and the set of sheets forming the stack is laminated in a lamination press under heat and pressure as described in the example 1.

Can then be separated by peeling the two manual marking films. A data carrier is obtained in the form of a card whose total thickness is equal to the sum of the thicknesses of the polycarbonate sheets used decreased by about 10%. The data carrier is provided on its outer faces holographic patterns, as shown in Figure 5.

EXAMPLE 3:

On a polyester film gloss 100pm thickness sold under the reference HA1000710X10 (MC) by the company TECNIFILM (Valencia, France; www.technifilm.com) are printed in screen printing (120 mesh) letters with an ink composition marketed under the reference® Lgl 10606 Ovtek Stellar by the company Tiflex (Poncin , France), and the multi-color:

blue/yellow, yellow/blue, red and green/red/green.

Is applied such a marking film on each of the two faces of a stack of polycarbonate sheets, and the set of sheets forming the stack is laminated in a lamination press under heat and pressure as described in the example 1.

Can then be separated by peeling the two manual marking films. A data carrier is obtained in the form of a card whose total thickness is equal to the sum of the thicknesses of the polycarbonate sheets used decreased by about 10%. The data carrier is provided on its outer faces iridescent color patterns corresponding to those printed on the polyester film in vitrophanie , which have been transferred to the outer side of the support data, during hot lamination and under pressure as shown in Figure 6. There is that a simple scraping surface does not allow completely removing such patterns, the ink having penetrated into the thickness of the polycarbonate.

EXAMPLE 4:

On a clear polyester mat 100 pm thickness sold under the reference® MTRXPL Arcophane by the company NORMANDY COATING , (Arques the battle, France; htt p:/ www.iiormand.Y~ eoating.eom fr // // mates.html The-products) are printed in screen printing (120 mesh) letters with an ink composition formed from a coating material sold under the reference by the company LG 111104 Tiflex (Poncin , France), and 30% of a pigment composition photoluminescent ultraviolet short marketed under the reference green CD 145 by the company Tiflex (Poncin , France).

Is applied such a marking film on each of the two faces of a stack of polycarbonate sheets, and the set of sheets forming the stack is laminated in a lamination press under heat and pressure as described in the example 1.

Can then be separated by peeling the two manual marking films. A data carrier is obtained in the form of a card whose total thickness is equal to the sum of the thicknesses of the polycarbonate sheets used decreased by about 10%. The data carrier is provided on its outer faces photoluminescent ultraviolet short patterns corresponding to those printed on the polyester film in vitrophanie , which have been transferred to the outer side of the support data, during hot lamination and under pressure as shown in Figure 6. There is that a simple scraping surface does not allow completely removing such patterns, the ink having penetrated into the thickness of the polycarbonate.

EXAMPLE 5:

On a polyester film thickness mat 75pm treated to promote adhesion sold under the reference® MTDE STABIPHANE by the company NORMANDY COATING , (Arques the battle, France;

htt p:// www.normandv-eoating.com/fr/Les-produits/mates.html) , are printed in screen printing (120 mesh) letters as shown in Figure 3 with a composition of ultraviolet curing lacquer marketed under the reference series® UV 391 Uvibond by the company SERICOL (Security screw fastening, France), mixed with 5% of an adhesion promoter sold under the reference by the VFP company UV290 (Saint Christol the Alès, France). Are printed varnish then (after curing thereof) overlapping the letters and at same pattern (same letters) an ink composition marketed under the reference reflective, metallized 3Y2656 by the company Tiflex (Poncin , France).

Is applied such a marking film on each of the two faces of a stack of polycarbonate sheets, and the set of sheets forming the stack is laminated in a lamination press under heat and pressure as described in the example 1.

Can then be separated by peeling the two manual marking films. A data carrier is obtained in the form of a card whose total thickness is equal to the sum of the thicknesses of the polycarbonate sheets used decreased by about 10%. The data carrier is provided on its outer faces relief patterns (recessed) corresponding to letters printed with the lacquer, and covered by the reflective metallized layer that has been transferred to the outer side of the support data, during lamination under heat and pressure. There is a excellent separation between the embossing lacquer and the metallic ink reflective, the latter having a high abrasion resistance being situated in recesses.

F ' invention is capable of numerous embodiments with respect to the embodiments and variations described above and in the examples shown in Figures and. In particular, it is possible to use a marking film to perform a lamination of marking of one or more layer (s) thermoplastic (s) prior to the lamination operation under heat and pressure of the entire stack that constitutes the multilayer data carrier. Each layer of thermoplastic and previously marked is incorporated in the stack. It is also possible to use other thermoplastic materials as polycarbonate, for example PVC or other. F ' invention applies to any data carrier multilayer, at least one outer layer is made of thermoplastic material, and is produced by lamination under heat and pressure, the nature of the various other layers constituting the stack used for the lamination having no importance, which may incorporate other layers of non-thermoplastic material, for example synthetic papers. The different embodiments may be combined, for example with a film die carrying patterns vitrophanie raised embossing applied to a face of the laminate stack, and a marking film name transferable applied to the other face of the stack, or with the same marking film carrying both pattern vitrophanie raised embossing indicia and transferable.