ES2796234T3 - Self-adhesive label with masked security message - Google Patents

Abstract

Self-adhesive security label comprising a movable multilayer assembly (3) with respect to a fixing multilayer assembly (4) on an object (2) when a peeling force is applied, the mobile multilayer assembly (3) comprising a transparent or translucent front material element (8) and a printing layer (12) located on at least a part of the lower face (11) of the front material element (8), the multilayer fixing assembly (4) comprising a layer of adhesive (6) carried by a support (7) from which it can be removed, comprising: - a sectioning layer (13) interposed between the front material element (8) and the printing layer (12), in a localized manner and in an overlapping position with respect to a part of the printing layer (12), the sectioning layer (13) presenting, with respect to the front material element (8), a retention force that is less than the peeling force of the mobile multilayer assembly d e so that the sectioning layer (13) and the printing layer (12a) located in an overlapping position can be separated from the mobile multilayer assembly (3) when the peeling force is applied while the lower face (11 ) of the front material element (8) has a retention force that, outside this sectioning layer (13), is greater than the peeling force, - at least one first separation layer (14) covering the adhesive layer (6), this separation layer (14) being designed in such a way that the retention force between the mobile multilayer assembly (3) and said separation layer (14) is less than the detachment force of the mobile multilayer assembly (3) so that the first separation layer (14) remains integral with the multilayer fixing assembly (4), this retention force being greater than the retention force of the sectioning layer (13) so that, when it has place the application of said force To peel off, the part (12a) of the printing layer (12) placed in the position of superposition of the sectioning layer (13) remains integral with the fixing multilayer assembly (4), - the label comprising a second layer of separation (17) that covers at least the printing layer (12), in contact with the first separation layer (14) as it is interposed between the printing layer (12) and the first separation layer (14), being the second separation layer (17) designed so that the retention force between the two separation layers (14, 17) is less than the detachment force of the mobile multilayer assembly (3) and so that the second separation layer (17) has a retention force with the printing layer (12) that is higher than the peeling force (F) so that the second separation layer (17) remains integral with the mobile multilayer assembly (3), except on the one hand placed in a position of superposition of the layer of se The mounting (13) remains integral with the multilayer fixing assembly (4), while the first separation layer (14) remains integral with the multilayer fixing assembly (4).

Description

DESCRIPTION

Self-adhesive label with masked security message

The present invention relates to the field of self-adhesive labels comprising a movable multilayer assembly that is completely removable or not with respect to a multilayer attachment assembly.

The self-adhesive label according to the invention finds a particularly advantageous application for constituting a security label that makes it possible to ensure the inviolability, traceability and / or authentication of the object on which the label is affixed.

In the field of self-adhesive security labels, the state of the art has proposed numerous embodiments of this type of labels.

In general, a self-adhesive label comprises a multilayer assembly that can be separated from a multilayer assembly for attachment to an object. The multilayer fixing assembly comprises a fixing material element composed of at least a paper or plastic film type front, provided on its underside with a layer of glue carried by a support whose contraction allows the label to be fixed on any type of object that must be insured. The detachable multilayer assembly comprises at least one front material element, generally printed on its upper face, assembled with the fixing material element by means of a varnish-glue.

One or more layers of so-called security printing are interposed between the front material element and the fixing material element. When the front material element is separated from the multilayer fastening assembly, then the multilayer fastening assembly lets appear, with the help of the security printing layers, a message attesting to the act of removal or attempted removal of the label. The multilayer fixing assembly comprising at least the front of the paper or plastic film type remains fixed on the object.

Although such a self-adhesive label is satisfactory in practice, it turns out that its manufacture requires various constituent elements that makes its manufacturing cost not insignificant. On the other hand, it turns out that the objects on which said labels remain attached need recycling at the end of their useful life. Therefore, such labels can increase the amount of material that must be recycled from the objects that receive such labels.

On the other hand, it seems that some of these security self-adhesive labels allow the security message to appear before any removal attempt, which presents a drawback in certain applications. Patent application EP 0657859 describes an adhesive closure that reveals fraudulent manipulation attempts for a cellulosic support of a container. This closure comprises a transparent front layer, a discontinuous layer of a deposit of a transparent barrier material bonded to the inner surface of the front layer, a colored layer firmly bonded to the front layer in areas where there are no deposits of the material transparent barrier. This closure also comprises two layers of adhesives that allow the release force to vary in order to ensure separation. This closure suffers from the drawback of presenting a sticky appearance both at the level of the mobile assembly and of the assembly fixed on the object.

Patent US 5294470 describes an object opening indicator system comprising a masking material that has poor adhesion properties on a transparent or translucent panel. A layer of colorant is disposed on the inner face of the transparent panel and beyond the masking material. An adhesive is arranged to envelop the colorant layer. The drawback of this system is the sticky appearance presented by the mobile assembly and the assembly that remains fixed on the object after opening.

The present invention envisages proposing a new self-adhesive security label comprising a multilayer assembly movable with respect to a multilayer fixing assembly, said self-adhesive label presenting a reduced manufacturing cost compared to known self-adhesive labels while reducing the proportion of material to recycle at the end of the useful life of the object provided with said label, for the same printing surface, the fixing multilayer assembly and the mobile multilayer assembly not presenting any sticky or adhesive character after separation.

Another objective of the invention is to propose a new security self-adhesive label designed to prevent the security message from appearing before any removal attempt.

To achieve this objective, the invention relates to a label according to claim 1.

The self-adhesive security label according to the invention further comprises, in combination, one and / or another of the following additional technical characteristics:

- the first separation layer is separated from the adhesive layer by means of one or more adhesive protection layers,

- the sectioning layer is made by depositing a mixture of ink, varnish, decolorizer, additives, - the sectioning layer is transparent or translucent, colored or not,

- the printing layer is separated from the sectioning layer or the front material element by means of an intermediate interlocking layer,

- the face of the sectioning layer, turned opposite to the front material element, as well as the lower face of the front material element are provided with a surface treatment that improves their surface tension,

the first separation layer is deposited and then activated on the printing layer, this first separation layer having a surface tension such that the lowest retention force between the layers of the label is located between the printing layer and the first separating layer, as regards the part located outside the sectioning layer, and on one side or the other of the sectioning layer, as regards the part located in relation to said sectioning layer , - the second separation layer is deposited and then activated on the printing layer, to have a certain surface tension, and the first separation layer is deposited and then activated on the second separation layer to have a tension of surface determined so that the lowest retention force between the layers of the label is located between the first separation layer and the second separation layer with respect to the part located outside the sectioning layer, and on one side or the other of the sectioning layer, as regards the part located in relation to said sectioning layer,

- each activated separation layer has a latching joint that depends on the surface tension between said separation layer and the layer on which it is deposited, as well as on the amount deposited.

Other different characteristics emerge from the description given below with reference to the attached drawings that show, by way of non-limiting examples, some embodiments of the object of the invention. Fig. 1 is a perspective view showing a self-adhesive label, affixed to an object.

Figure 1A is a view of the self-adhesive label illustrated in Figure 1 with the movable multilayer assembly raised with respect to the multilayer attachment assembly.

Figure 2 is a sectional view of a label.

Fig. 2A is a sectional view showing the self-adhesive label illustrated in Fig. 2 whose movable multilayer assembly is withdrawn from the multilayer attachment assembly.

Figure 3 is a sectional view of an embodiment of a self-adhesive label according to the invention.

Figure 3A is a sectional view of the self-adhesive label illustrated in Figure 3 with the movable multi-layer assembly removed from the multi-layer attachment assembly.

As can be seen from Figures 1, 1A, the present invention refers to a self-adhesive label 1 intended to be affixed to an object 2 of any nature in order to ensure the inviolability, traceability and / or authentication of the object 2 on which the label is attached. In general, the self-adhesive label 1 comprises a multilayer assembly 3 which is mobile with respect to a multilayer assembly 4 for fixing on the object 2, when a peeling force F is applied between the mobile multilayer assembly 3 and the multilayer assembly fixing 4.

As can be seen more precisely from Figures 2 and 2A, which illustrate an embodiment of the self-adhesive label that does not belong to the invention, the multi-layer fixing assembly 4 comprises at least one layer of adhesive 6 such as glue, carried by a support 7 that has an anti-adhesive character with respect to the adhesive layer 6. The support 7 is thus removed from the multi-layer fixing assembly 4 to allow the label 1 to be fixed on the object 2. It should be noted that the different layers of label 1 represented in the drawings are not to scale, but are illustrated solely for the understanding of the invention.

The mobile multilayer assembly 3 comprises at least one front material element 8 made of any suitable material, for example paper or plastic material, transparent or opaque, colored or not. This front material element 8 is made of one or more layers of materials. For example, the front material element 8 is a polypropylene film. The front material element 8 has an upper face 9 and on the opposite side, a lower face 11. The lower and upper terms must be considered with respect to the sense of observation of the object 2 when the label is fixed on the object, with the whole mobile multilayer 3 in contact with the fixing multilayer assembly 4.

A printing layer 12 is produced on all or part of the lower face 11 of the front material element 8. The printing layer 12 is produced in any suitable way on the lower face 11 and for example by flexography. Obviously, the upper face 9 of the front material element 8 can be printed. According to the invention, the self-adhesive label according to the invention comprises a sectioning layer 13 interposed between the front material element 8 and the printing layer 12. This sectioning layer 13 is made in a localized manner with respect to the surface of the layer. printing layer 12 such that a part 12a of the printing layer 12 is in an overlapping position with respect to the sectioning layer 13. In other words, the printing layer 12 thus comprises a part 12a located in contact with the layer section 13 and a part 12b located outside the sectioning layer 13, being in direct or indirect contact with the lower face 11 of the front material element 8, as will be explained in the continuation of the description.

The sectioning layer 13 has a holding force such that the printing layer located in the overlapping position, i.e. the printing layer part 12a can be separated from the front material element 8 when the peeling force is applied. F so that it forms part of the mobile multilayer assembly 3. On the other hand, the lower face 11 of the front material element 8 has a retention force that, outside this sectioning layer 13, is greater than the peeling force F so that the part 12b of the printing layer, located outside the sectioning layer 13, remains integral with the mobile multilayer assembly 3.

In the exemplary embodiment illustrated in Figures 2, 2A and 3, 3A, the sectioning layer 13 exhibits, with respect to the front material element 8, a retention force that is lower than the peeling force F of the mobile multilayer assembly 3, so that the sectioning layer 13 separates from the front material element 8 when the peeling force F is applied. The detachment of the sectioning layer 13 thus simultaneously drags the corresponding part 12a of the printing layer 12 which is separates from part 12b of the printing layer, the latter remaining integral with the front material element 8. In other words, the sectioning layer 13 acts as a cutting element of the printing layer 12, according to a contour defined by the contour of sectioning layer 13.

For example, the sectioning layer 13 is made of a mixture, for example of the type ink, varnish, decolorizer, additives.

This sectioning layer 13 is transparent or translucent, colored or not.

According to an embodiment illustrated in the drawings, but not exclusive, the printing layer 12 is separated from the sectioning layer 13 with the aid of an interlocking interlayer A. In the same sense, the printing layer 12 can be separated of the front material element 8 by an intermediate hooking layer A. This intermediate hooking layer A can be produced, for example, by printing. As can be seen from the figures, this intermediate hooking layer A is interposed between, on one side, the printing layer 12 and, on the opposite side, the sectioning layer 13 and the lower face 11 of the front material element 8. Obviously , the printing layer 12 can be made directly on the underside 11 on which the sectioning layer 13 has been previously deposited.

It should be noted that one or more complementary printing layers 12 'can be envisaged as illustrated in Figures 3 and 3A, between the printing layer 12 and the interlocking interlayer A.

According to a preferred embodiment variant illustrated in Figures 2, 2A and 3, 3A, the face 13a of the sectioning layer 13, turned opposite to the front material element 8, is provided with a surface treatment t that improves its surface tension. Also, the lower face 11 of the front material element 8 is provided with a surface treatment t that improves its surface tension. In this way, after placing the sectioning layer 13 on the lower face 11 of the front material element 8, a surface treatment t is then carried out on the entirety of this lower face 11 of the front material element 8. For example, can do corona treatment as surface treatment t. Said surface treatment thus makes it possible to increase the surface tension between the lower face 11 of the front material element 8 and the intermediate layer coupling A, while the surface tension between the front material element 8 and the sectioning layer 13 remains lower since the surface treatment t has not been performed between the sectioning layer 13 and the front material element 8.

According to another characteristic of the invention, the self-adhesive label 1 comprises at least a first separating layer 14 covering at least a part of the adhesive layer 6. According to a first variant of embodiment illustrated in Figures 2 and 2A, the Self-adhesive security label 1 comprises a single separation layer 14. It should be noted that the separation layer 14 is separated or not from the adhesive layer 6 with the help of one or more layers of protection against the adhesive.

This first separation layer 14 is designed in such a way that the retention force between the mobile multilayer assembly 3 and said first separation layer 14 is less than the peeling force F of the mobile multilayer assembly 3 exerted to guarantee a detachment between the multilayer assembly. movable 3 and the multilayer fastening assembly 4. The first separation layer 14 thus remains integral with the multilayer fastening assembly 4 when said peeling force F is applied. In this regard, the first separation layer 14 has a retention force with adhesive layer 6, which is higher than peel force F.

This first separation layer 14 is deposited and then activated on the printing layer 12 before being brought into contact with the adhesive layer 6. This first separation layer 14 has a surface tension such that the lowest retention force between the different layers of the label is located:

- between the printing layer 12 and the first separation layer 14, as regards the part located outside the sectioning layer 13 and,

- on one side or the other of the sectioning layer 13, as regards the part located in relation to said sectioning layer 13.

As explained above, at the level of said sectioning layer 13, the lowest retention force is between the sectioning layer 13 and the front material element 8 (Figures 2-2A and 3-3A). The retention force of the sectioning layer 13 with the front material element 8 is lower than the retention force of the first separation layer 14. The part 12a of the printing layer placed in overlapping position of the sectioning layer 13 It thus remains integral with the fixing multilayer assembly 4. The first activated separation layer 14 has an engaging connection as a function of the surface tension between said separation layer and the layer on which it is deposited, that is, the printing layer. 12 in the illustrated example.

After lifting the mobile multilayer assembly 3 with respect to the fixing multilayer assembly 4, the fastening multilayer assembly 4 comprises as upper face, the upper face 15 of the first separation layer 14 and the sectioning layer 13 while the multilayer assembly movable surface 3 comprises as lower face, the lower face 16 of the printing layer 12, without the part 12a of the printing layer 12 superimposed on the sectioning layer 13. In the example illustrated in figure 1A, the part 12a of the Print layer appearing on top 15 through sectioning layer 13 corresponds to the word "OPEN". Symmetrically, the lower face of the mobile multilayer assembly 3 lets the word "OPEN" appear in the negative.

According to an advantageous embodiment, the upper face 15 of the first separation layer 14 is non-adhesive.

According to an advantageous embodiment, the underside 16 of the printing layer 12 is also non-adhesive.

By way of example, the first separation layer 14 may be a "peel-ofT" type activatable varnish .

According to a second variant embodiment illustrated in particular in Figures 3-3A, the self-adhesive label 1 comprises a first separating layer 14 but also a second separating layer 17 covering at least the printing layer 12 made on the lower face 11 of the front material element 8. This second separation layer 17 is in contact with the first separation layer 14 since it is interposed between the printing layer 12 and the first separation layer 14. Advantageously, the two separation layers 14 and 17 are perfectly superimposed.

This second separation layer 17 is designed so that the retention force between the two separation layers 14 and 17 is lower than the peeling force F of the mobile multilayer assembly 3, so that the second separation layer 17 remains integral with the movable multilayer assembly 3 while the first separation layer 14 remains integral with the fixing multilayer assembly 4. It should be noted that the second separation layer 17 has a retention force with the printing layer 12, which is higher than peel force F.

The second separation layer 17 is deposited and then activated on the printing layer 12 to have a determined surface tension. On the other hand, the first separation layer 14 is deposited and then activated on the second separation layer 17, before being brought into contact with the adhesive layer 6. The second separation layer 17 has a determined surface tension of so that the lowest retention force between the different layers of the label is located:

- between the first separation layer 14 and the second separation layer 17 as regards the part located outside the sectioning layer 13 and,

- on one side or the other of the sectioning layer 13, as regards the part located in relation to said sectioning layer 13.

As explained above, at the level of said sectioning layer 13, the lowest retention force is between the sectioning layer 13 and the front material element 8 (Figures 3 and 3A). The retention force of the sectioning layer 13 with the front material element 8 or with the printing layer 12, including the interlocking layer A is less than the retention force of the separating layers 14 and 17. The part 12a of the printing layer placed in a position of superposition of the sectioning layer 13 thus remains integral with the fixing multilayer assembly 4.

Each activated separation layer 14 and 17 has a latching bond as a function of the surface tension between said separation layer and the layer on which it is deposited, as well as the amount deposited. Controlling the amount deposited allows the separation force of the mobile assembly to vary with respect to the fixed assembly according to the need or the object on which the label will be deposited. This ease of regulation allows to adapt more quickly and easily to the intrinsic restrictions of gluing on various objects. After lifting the mobile multilayer assembly 3 with respect to the fastening multilayer assembly 4, the fastening multilayer assembly 4 comprises as its upper face, the upper face 15 of the first separation layer 14 and the sectioning layer 13 (Figure 3A) while that the mobile multilayer assembly 3 comprises as its lower face, the lower face 19 of the second separation layer 17 without its part placed in a position of superposition with the sectioning layer 13, the upper face 20 of the second separation layer 17 being in contact with the printing layer 12. As explained above in relation to Figures 2-2A, the lower face of the movable multilayer assembly 3 allows a pattern similar to that presented by the upper face of the fixing multilayer assembly 4 to appear in negative. .

According to an advantageous embodiment, the lower face 19 of the second separating layer 17, and because of the mobile multilayer assembly 3, is non-adhesive. Also, as noted above, the top face 15 of the first separation layer 14 is also non-adhesive.

By way of example, the first release layer 14 may be a "release" type activatable varnish while the second release layer 17 may be a "peel-off" type activatable varnish .

It follows from the above description that the self-adhesive label 1 according to the invention comprises a single material element, that is to say the front material element 8. The multi-layer fixing assembly 4 which is fixed on the object 2 thus does not comprise any material element.

The self-adhesive label 1 according to the invention has the advantage of being able to be adapted or configured in different ways, so that a security label is made in order to ensure the inviolability, authentication and traceability of the objects 2 on which said label it is meant to be fixed.

The invention is not limited to the examples described and represented, since various modifications can be made to it without departing from its scope.

Claims (9)

1. Self-adhesive security label comprising a movable multilayer assembly (3) with respect to a fixing multilayer assembly (4) on an object (2) when a peeling force is applied, the movable multilayer assembly (3 ) a transparent or translucent front material element (8) and a printing layer (12) located on at least a part of the lower face (11) of the front material element (8), comprising the multilayer fixing assembly (4) A layer of adhesive (6) carried by a support (7) from which it can be removed, comprising: - a sectioning layer (13) interposed between the front material element (8) and the printing layer (12), in a localized manner and in an overlapping position with respect to a part of the printing layer (12), presenting the sectioning layer (13), with respect to the front material element (8), a retention force that is less than the peeling force of the mobile multilayer assembly so that the sectioning layer (13) and the printing layer (12a ) located in an overlapping position can be separated from the mobile multilayer assembly (3) when the peeling force is applied, while the lower face (11) of the front material element (8) has a retention force that, outside of this sectioning layer (13) is greater than the peeling force, - at least one first separating layer (14) covering the adhesive layer (6), this separating layer (14) being designed so that the retention force between co n movable multilayer assembly (3) and said separation layer (14) is less than the peeling force of the mobile multilayer assembly (3) in order that the first separation layer (14) remains integral with the fixing multilayer assembly ( 4), this retention force being greater than the retention force of the sectioning layer (13) so that, when the application of said peeling force takes place, the part (12a) of the printing layer (12) placed in the overlapping position of the sectioning layer (13) remains attached to the multilayer fixing assembly (4), - the label comprising a second separation layer (17) that covers at least the printing layer (12), in contact with the first separation layer (14) as it is interposed between the printing layer (12) and the first separation layer (14), the second separation layer (17) being designed in such a way that the retention force between the two separation layers (14, 17) is less than the peeling force of the mobile multilayer assembly (3) and so that the second separation layer (17) has a retention force with the printing layer (12) that is greater than the peeling force (F) so that the second separation layer (17) remains integral with the mobile multilayer assembly (3), except for a part placed in an overlapping position of the sectioning layer (13) that remains integral with the fixing multilayer assembly (4), while the first separation layer (14) remains integral with the multilayer fixing assembly (4). Self-adhesive label according to Claim 1, characterized in that the first separating layer (14) is separated from the adhesive layer with the aid of one or more adhesive protection layers. Self-adhesive label according to one of claims 1 or 2, characterized in that the sectioning layer (13) is produced by depositing a mixture of ink, varnish, decolorizer, additives. Self-adhesive label according to one of Claims 1 to 3, characterized in that the sectioning layer (13) is transparent or translucent, colored or not. Self-adhesive label according to claim 1, characterized in that the printing layer (12) is separated from the sectioning layer (13) or from the front material element (8) by means of an intermediate attachment layer (A). Self-adhesive label according to one of Claims 1 to 5, characterized in that the face of the sectioning layer (13), turned opposite to the front material element (8) as well as the lower face (11) of the front material element (8 ) are provided with a corona treatment. 7. Self-adhesive label according to claim 1, characterized in that the first separation layer (14) is deposited and then activated on the printing layer (12), this first separation layer (14) exhibiting a surface tension such that the lowest retention force between the layers of the label is located between the printing layer (12) and the first separation layer (14), as regards the part located outside the sectioning layer (13), and on one side or the other of the sectioning layer (13), as regards the part located in relation to said sectioning layer (13). 8. Self-adhesive label according to claim 1, characterized in that the second separation layer (17) is deposited and then activated on the printing layer (12), to present a specific surface tension, and that the first layer of separation (14) is deposited and then activated on the second separation layer (17) to present a determined surface tension such that the force of The lowest retention between the label layers is located between the first separation layer (14) and the second separation layer (17) with respect to the part located outside the sectioning layer (13), and by a side or the other of the sectioning layer (13), as regards the part located in relation to said sectioning layer (13). 9. Self-adhesive label according to claim 8, characterized in that each activated separation layer (14, 17) has an engaging joint that depends on the surface tension between said separation layer and the layer on which it is deposited, as well as of the amount deposited.