Multi-layer element with at least one element containing material sensitive to laser emission

FIELD: the invention refers to a multiplayer body.

SUBSTANCE: the multi-layer body fulfilled as a carbon film preferably as hot stamping film or as laminated film consists of layer structure formed with a substrate, a layer sensitive to laser emission where layered structure has one background layer which serves for laser emission as reflective and/or opaque , and/or absorbent which is correlated with a layer sensitive to laser emission. The background layer is located in one partial field on the side inverted to the layer sensitive to laser emission and provides so that laser emission does not pass or pass in a very insignificant degree into the layers below the background layer so that sufficient destruction of the substrate is averted under influence of used laser emission.

EFFECT: creation of multi-layer element that ensures possibility of forming exceptionally accurate and many-sided marking induced with laser.

18 cl, 10 dwg

 

Description

The present invention relates to a multilayer element comprising performed with the substrate of the layered structure at least one layer containing sensitive to laser radiation material, hereinafter referred to as sensitive to laser radiation layer.

Such multilayer elements can be produced, for example, using conversion film, preferably foil hot stamping. It is known that such films are applied on the basis of synthetic material for educational identification card or code card and by means of laser processing of the exposed film take individualization card. When laser processing is sensitive to laser radiation layer formed marks.

In the publication EP 1022625 described transfer film, which allows you to migrate on the substrate hologram.

In the publication DE 10047450 A1 describes a product with a protective element, in this case, for example, an opaque main film or another safe product to form a protective element applied in alternating sequence, a transparent covering film and sensitive to laser radiation colored layers.

The basis of the invention lies in the task of creating a multilayer element of the aforementioned type, which ensures that formed the Finance particularly accurate and versatile induced by laser marking. In particular, occur when laser processing is undesirable deterioration in the subsequent layer or on a substrate a multilayer element should be minimized or eliminated. Should also be possible to use a substrate of paper material.

The invention solves the above problem by a set of characteristics paragraph 1 of the claims.

Due to the fact that sensitive to laser radiation layer correlated background layer, which is applied during formation induced by laser marking, laser radiation is preferably largely reflects, or at least is essentially opaque for this laser radiation, or at least is essentially opaque to non-mirrored part of the incident laser radiation is achieved in that the laser radiation does not penetrate or penetrates only to a limited extent in the layers below the background layer. Additionally or alternatively can be provided that the background layer is absorbent to laser radiation, so that at least a large part of the non-radiation is absorbed in the background. Thus, the background layer forms a protective layer to the underlying layers or substrate. This means that even very sensitive to laser radiation substrate, for example, mean the LCD from paper material, can be used without problems. It was found that sensitive to laser radiation layer itself to the underlying layer acts as a protective layer, and a big part of the current in the laser processing laser radiation do not completely penetrate through sensitive to laser radiation layer or does not reach the underlying layer, and thereby prevents substantial destruction of the substrate. However, the background layer provides a significantly higher degree of protection, so that it becomes possible to precisely limited and versatile induced by laser marking, and, in addition, achieved significantly greater freedom of morphogenesis during execution of the layered structure.

Alternative or additionally, the background layer is also used to enhance color or lightening induced by laser marking, made in the overlying sensitive to laser radiation layer. In the background layer can also be given special brightening agents to ensure this effect.

Preferably, the background layer is placed under sensitive to laser radiation layer only in a partial region, namely the preferred way only under the area in which capacity induced by laser marking, i.e. in the AGS, the reduced partial region sensitive to laser radiation layer, which must be induced by laser marking.

In especially preferred forms of execution provides lots located one above the other sensitive to laser radiation of layers in a layered structure. In such cases it is preferable to perform a background layer, in particular between sensitive to laser radiation layers.

In preferred embodiments, the implement is provided that is applied to the substrate transfer or laminated film, and the film made of one or more layers, and at least one layer is made as sensitive to laser radiation layer. The background layer can also be made in the film, but also can be a part of the substrate, for example, in the form of a surface layer of the substrate. In other embodiments, the implementation provides that the multilayer laminated element of several covering films and inserts. At least one of the covering film can be made as sensitive to laser radiation layer or may be sensitive to laser radiation layer. It can be done, for example, as a laminated film by coating the film hot stamping supplied sensitive to laser radiation layer.

Below the preferred options is sushestvennee described in more detail with reference to the drawings. In the drawings shown:

Figure 1 is a view in cross section of a variant of implementation of the multilayer element comprising a paper substrate on which the plots applied multi-layer film;

Figure 2 is a top view of the structure of figure 1;

Figure 3 is a top view corresponding to the showing in figure 2, a modified version of the implementation;

Figure 4-6 is a view in cross-section of embodiments of transfer films sensitive to laser radiation layer and assigned a background layer;

Fig.7-9 - performance in the cross-section of embodiments of the laminated films is sensitive to laser radiation layer and assigned a background layer;

Figure 10 - view from a diversity of components laminated card basics, consisting of covering films and inserts.

In the embodiment represented in figures 1 and 2, we are talking about the ID card with different markings and individualizing elements, as can be seen in the top view presented in figure 2. The base card, hereinafter referred to as card 8, consists of a paper material. On its surface, as can be seen in figure 1, is equipped with a laminated film. The film contains as a layer, a protective layer 3, layer 4 which is sensitive to laser radiation material, the background layer 5 and an adhesive layer 6, which it is glued to the surface of the card 8. The film is placed solely on one area of the card 8. It has a rectangular contour, as can be seen in figure 2. The film may be applied to the card 8 through a conversion process, for example by hot stamping foil hot stamping. Such transfer film shown in figure 4 in the section. Shown above the protective layer 3 remove the layer 2 and the carrier film 1 in the bill process, which is usually carried out at elevated pressure and elevated temperature are removed.

As follows from figure 2, sensitive to laser radiation layer made laser-induced color image u. This color image a may be formed by laser-induced bleaching sensitive to laser radiation material layer 4. The method of laser-induced bleaching is described in more detail below. Under the whole area is sensitive to laser radiation layer 4 made the background layer 5. This background layer 5 is opaque in the visible spectral range, so that the substrate 8 is covered (shielded). As can be seen from figures 1 and 2, on the surface of the substrate 8 is made marking 81 (see figure 1), which is visible only in the area outside the color image u or outside of the background layer 5 when considering the top (see figure 2). Marking 81 consists of the safety print 81d, which is in this embodiment made according to the type of gelosa (pattern engraved interlocking wavy lines type watermarks). In addition, the substrate and its surface is placed fluorescent threads 81f, which when irradiated with ultraviolet light to reflect, and in the visible spectral range have the black threads. In addition, as another marking in the substrate 8 is made watermark 81w, as well as protective strip 81s. Protective strip 81s may have a different marking and individualizing elements, such as diffraction and/or hologram structure, induced by laser marking, etc. Protective strip 81s in the shown embodiment, is made in the substrate 8. It passes through the substrate under laser induced color image u and there, due to the opaque background layer 5, is not visible. Protective strip 81f is visible only in the scope in which it passes over the laser induced image u.

Figure 3 shows an implementation option, a modified relative to the variant of figure 1 and 2. In the embodiment according to figure 3 only in the left half of the laser-induced image u is the background layer 5, so that only left in this partial area, which made the background layer 5, marking 81 on the substrate 8 is covered and what e is viewed. In the rest of the field induced by laser image o the background layer 5 is absent, so in this area colored with shades of transparent laser-induced image u viewed through the surface of the substrate 8, and accordingly is visible marking 81. In this embodiment provides a particularly high degree of protection against forgery, as the laser-induced image u especially diverse optically interacts with the rest of the marks.

In modified embodiments, the implementation in the film layers may also be made of the diffraction and/or hologram structure. 5 and 6 show the transfer film, which contain similar diffraction and/or hologram structure 5b in its layered structure. The film in figure 5 corresponds to the structure of the film 4, and only advanced between the protective layer 3 and is sensitive to laser radiation layer 4 made extra layer 5C of varnish and the reflection layer 5r. Diffraction and/or hologram structure 5b made in the field layer 5C lacquer reflective layer 5r and sensitive to laser radiation layer 4. In the embodiment according to Fig. 6 additional layer 5C varnish made as sensitive to laser radiation layer 4C. In this embodiment, in addition to. gnome to laser radiation layer 4 has a pressure-sensitive laser radiation layer 4C, between which passes the reflection layer 5r. Sensitive to laser radiation layers 4 and 4S can be run from the same sensitive to laser radiation material, as well as from two different sensitive to laser radiation materials. All shown in figure 4-6 options for implementation under sensitive to laser radiation layer 4 respectively on the facing substrate side is made the background layer 5, which, as shown in figure 1-3 variants of implementation, can act as a protective layer during the laser processing, as well as Dodge and amplifier, color laser-induced image.

7-9 are laminated film, which according to the structure of the layers correspond to the bills of films on figure 5-6. Covering film 30 corresponds to the protective layer 3. Other layers: sensitive to laser radiation layer 40, the background layer 50, a reflective layer 50r and the adhesive layer 60 correspond sensitive to laser radiation layer 4, the background layer 5, a reflective layer 5 or the adhesive layer 6. Accordingly and in laminated films on Fig and 9 is provided by diffraction and/or hologram structure 50b, which correspond to the diffraction and/or hologram structure 5b figure 5 and 6.

In the embodiment according to figure 10 multilayer element is designed as Lam is nizovannoj basis of various covering films and inserts. Posted by top covering film 30 has on its underside a few layers, which are made by applying a conversion film on the covering film. Among these layers, layer 5C lacquer reflective layer 5r and sensitive to laser radiation layer 4, the background layer 5 and an adhesive layer 6. In the field layer 5C lacquer reflective layer 5r and sensitive to laser radiation layer 4 is made of a diffraction and/or hologram structure 5b.

Below this film structure is placed covering film 32 consisting of a material doped with carbon and/or soot. In the case of this alloy covering film we are talking about the second sensitive to laser radiation layer. In this layer when the corresponding laser action occurs carbonation, resulting in a particular installation conditions of the laser radiation can be obtained marking with gray.

Below this alloy covering film 32 are insert 90, which in the shown embodiment, may be made of paper material. On the bottom side of the lower inserts are placed covering film 30, and another covering film 30.

To form the laser-induced marking in sensitive to laser radiation layer is laser irradiation preferably has caused is authorized on a substrate film or coating. Alternative laser irradiation may be conducted prior to application, i.e. directly through irradiation only film. The full-color image formation, i.e. the formation of laser-induced marking in the form of a full-color image may be carried out in the variants of implementation, which is sensitive to laser radiation material made of a mixture of a blue pigment component, the red component of the pigment and the yellow pigment component. For such a case for the formulation of layers of film hot stamping provided at the end of the description.

When bleaching at the first stage produces blue or green, or red color coded, with a given area is irradiated by laser radiation with a certain wavelength, whereby certain components of the pigments are bleached.

To form a blue color should otmelivatsja yellow pigment component. For this it uses blue laser light. For whitening requires a certain minimum intensity. In addition, should not be exceeded a certain pulse width. So the first step is to get the green color coded, must otmelivatsja only the red component of the pigment. To do this, use the green laser light. The first phase is to obtain the red color coded, should otmelivatsja only the blue component of the pigment. It uses the red laser light.

In order for this site to generate color coded in blue, red or yellow, this area is subjected to laser processing in the second stage, namely laser radiation with wavelength, by means of which on this site is not yet bleached bleached components of pigments. If the first stage is formed blue color code on this site is not bleached are the blue component of the pigment and the red pigment component. To elaborate on this site blue color, in this second step should otmelivatsja red component of the pigment. It is a green laser light. Thus in this area is formed blue color marking.

If the second stage instead of this blue markings must be received red colour marking, obtained at the first stage of the blue colour of the markings should be treated with red light laser. Thus, the blue pigment in this area bleached, so that this site remains unbleached red pigment. Therefore, this area formed the red colour marking.

Accordingly obtained from the first stage green color marking, which is formed ostalim is camping there unbleached blue pigment and a yellow pigment, to form a blue color coded or yellow color coded, namely by processing the blue light laser or red laser light.

Accordingly, you obtained in the first stage, the red color marking on the second stage to convert to yellow or red color scheme, namely, by laser processing in the second stage green laser or blue laser light.

In order to processed on the first and second stage area to get the transparent area, that is to get a white area, if the background layer 5 is white, the third stage should this site be processed by a laser beam, the wavelength of which is chosen so that the remaining in this area after the second stage unbleached component of pigment bleached, i.e. yellow colour marking should otmelivatsja blue laser, red color marking must otmelivatsja green, and blue color marking must otmelivatsja red laser light.

In the same way after that is sensitive to laser radiation layer 4 is processed in other adjacent areas to form other colour markings in the layer 4 foil hot stamping. Thus it is possible to produce full-color image.

Laser treatment can be the t also be used to dye or dyes sensitive to laser radiation layer to form a color marking or full-color image by changing color. Laser treatment may suitably be carried out through successive stages of the method. As dyes, i.e. coloring substances may be used pigments. They are often insoluble, and, as a rule, we are talking about inorganic substances. As the dyes can also be used mostly soluble organic dyes. The color change occurs under particular conditions of laser processing, which are used in the laser processing on a separate stages.

Accordingly bleaching method and color conversion can also be used when sensitive to laser radiation material consists of only one or two components of the dye. In the laser processing can also be used and other components of dyes and other wavelengths of laser radiation.

Laser processing conversion film for forming colored markings can alternatively be carried out before application of the film, namely in the case, if the protective layer 3 is performed as opaque or only partially transparent to laser radiation slo is, or as a layer that is opaque to laser radiation in a certain wavelength range, or if an additional absorbing ultraviolet radiation protective layer. Laser processing is carried out then before applying the film, while the laser beam is directed on the reverse side of the film, i.e. on the background layer 5 or the adhesive layer 6, and thereby sensitive to laser radiation layer 4 is processed with the other hand to get it color-coded similarly. The background layer 5 and an adhesive layer 6 in such applications are transparent or at least partially transparent or transparent only in partial ranges for the respective laser radiation.

Layers 2 through 6 can be made according to the following recipe.

Remove the layer 2 (intermediate layer):

Toluene99,5 part
Ester wax (dropping point)0.5 parts

The protective layer 3 (protective layer of varnish):

Methyl ethyl ketone61,0
Diablosport9 parts
Methylmethacrylat (Tg=122°C)18.0 parts
Dispersion of polyethylene (23% in the silole) (softening point 140° C)to 7.5 parts
High-molecular dispersant additive(40%, amine number 20)0.5 parts
Filler (aluminum silicate)4 pieces

Sensitive to laser radiation layer 4

(The first layer paramaka):

Methyl ethyl ketone34,0 part
Toluene26.0 parts
The ethyl acetate13.0 parts
Nitrate cellulose (low viscosity, 65% in alcohol)20.0 parts
Linear polyurethane (Fp.>200°C)3.5 parts
High-molecular dispersant additive (50%, amine number 20)2.0 part
for example, pigment blue 15:40.5 parts
pigment red 57:10.5 parts
pigment yellow 1550.5 parts

The background layer 5 (second layer paramaka):

Methyl ethyl ketone40.0 parts
Toluene22,0 part
The ethylene-vinyl acetate ternary copolymer (Fp.=60°C)2.5 parts
Polyvinyl chloride (Tg:89°)5,5 part
Polivi illorin (Tg:40° C)to 3.0 parts
Dispersing additive (50%, acid number 51)1.0
Titanium dioxide (d=3,8-4,2 g/cm3)26.0 parts

The adhesive layer 6:

Methyl ethyl ketone55,0 parts
Toluene12,5 part
Ethanol3.5 parts
The polyvinyl acetate (softening point 80°)6.0 parts
Butyl/methyl methacrylate (Tg:80°C)8.0 parts
The polymer methacrylate (Tg:63°C)to 3.0 parts
The methacrylate copolymer (Tg:80°C)5.0 parts
Unsaturated complex polyester (melting point 103°)3.5 parts
Silicon dioxide3.5 parts

1. The layered body consisting of a layered structure formed with the substrate, with at least one layer containing sensitive to laser radiation material, referred to as sensitive to laser radiation layer, wherein the layered structure comprises at least one background layer, which is used for laser radiation reflective and/or opaque, and is, and absorbing, which is correlated with at least one sensitive to laser radiation layer, the background layer is placed at least in one partial region on the facing substrate side is sensitive to laser radiation layer and ensures that the laser light does not pass or passes in a very small extent in the layer below the background layer, so prevent a significant disruption of the substrate under the influence of the laser radiation.

2. A multilayer body according to claim 1, wherein some of the layers of a multilayer structure, preferably sensitive to laser radiation layer and assigned the background layer and preferably one or more sensitive to laser radiation layer is preferably correlated with the background layer, generally covering film or a short covering films.

3. A multilayer body according to claim 1 or 2, characterized in that the substrate is made of at least one insert.

4. A multilayer body according to claim 1, characterized in that the substrate or at least one of the inserts is made or is made of paper.

5. A multilayer body according to claim 1, characterized in that the laminated body is preferably designed as laminated films-inserts the body of several films, such as one or more on ryuuma films and one or more inserts.

6. A multilayer body made as a transfer film, preferably a film, hot stamping, or as a laminated film, which comprises at least one layer containing sensitive to laser radiation material, referred to as sensitive to laser radiation layer, characterized in that the film as one layer contains at least one background layer, which is used for laser radiation reflective and/or opaque, and/or substantially non-transparent, and/or absorbing, which is correlated with at least one sensitive to laser radiation layer, the background the layer is placed at least in one partial region on the side sensitive to laser radiation layer associated with the substrate, and ensures that the laser light does not pass or passes in a very small extent in the layer below the background layer, so prevent a significant disruption of the substrate under the influence of the laser radiation.

7. A multilayer body according to claim 6, wherein the background layer for light in the visible spectral range is transparent and/or laser radiation only under certain conditions, in particular, only certain wavelengths and/or angles of irradiation is transparent or pprozac is passed preferably used for the laser radiation, which is used for the formation of laser-induced marking is sensitive to laser radiation layer is transparent or opaque.

8. A multilayer body according to claim 1 or 6, characterized in that the background layer is placed under sensitive to laser radiation layer only in a partial area or the whole area is sensitive to laser radiation layer, preferably under the area in which capacity induced by laser marking.

9. A multilayer body according to claim 1 or 6, characterized in that the background layer is placed directly with the joining associated with him sensitive to laser radiation layer.

10. A multilayer body according to claim 1 or 6, characterized in that between the background layer and associated with him sensitive to laser radiation layer is placed at least one intermediate layer.

11. A multilayer body according to claim 1 or 6, characterized in that several sensitive to laser radiation layer is made at least partially one above the other and between the two placed one above the other sensitive to laser radiation layers placed at least on parts of the background layer.

12. A multilayer body according to claim 1 or 6, characterized in that sensitive to laser radiation sensitive material to laser izlucheniya under the influence of laser radiation induced is formed by laser marking, preferably by means of laser-induced bleaching, and/or laser-induced color change, and/or laser-induced blackening.

13. Multilayer body 12, characterized in that sensitive to laser radiation material is made as a mixture of various sensitive to laser radiation components.

14. A multilayer body according to item 13, characterized in that the mixture contains two, preferably three, different sensitive to laser radiation component, which by means of laser under particular conditions of laser radiation change, preferably bleached, and for each of the two or three components, it is a condition that under particular conditions of laser radiation for one component, the other or both of the other component are not bleached or essentially non-bleached or do not change color.

15. A multilayer body according to claim 1, characterized in that sensitive to laser radiation sensitive material to laser radiation layer under the influence of the laser radiation is generated induced by laser marking, preferably by means of laser-induced bleaching, and/or laser-induced color change, and/or laser-induced blackening, and which is sensitive to laser radiation material contains a cyan dye, preferably a blue pigment, and/or rainy dye, preferably red pigment, and/or yellow dye, preferably yellow pigment.

16. A multilayer body according to claim 6, characterized in that sensitive to laser radiation sensitive material to laser radiation layer under the influence of the laser radiation is generated induced by laser marking, preferably by means of laser-induced bleaching, and/or laser-induced color change, and/or laser-induced blackening, and which is sensitive to laser radiation material contains a cyan dye, preferably a blue pigment, and/or red dye, preferably a red pigment, and/or yellow dye, preferably yellow pigment.

17. A multilayer body according to item 15, wherein the blue pigment is designed as a dye, bleach red laser light, and/or red dye made as a dye, bleach green laser light, and/or yellow dye is made as a dye, bleach blue laser light.

18. A multilayer body according to item 16, wherein the blue pigment is designed as a dye, bleach red laser light, and/or red dye made as a dye, bleach green laser light, and/or yellow dye is made as a dye, bleach blue laser light.



 

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