JP5648490B2 - Anti-counterfeit label - Google Patents

Description

  The present invention relates to anti-counterfeit labels that can be used for product packages such as sporting goods, electrical products, computer parts, software, and seal labels that are affixed to doors of devices that are not allowed to be opened, and particularly used for authentication of brand protection, etc. The present invention relates to an anti-counterfeit label for preventing re-applying using an OVD (Optically Variable Device) in which a color and an image change depending on a viewing angle including a hologram being used.

  In recent years, it is possible to express stereoscopic images and special decorative images by using light interference, such as multilayer thin films that produce color changes (color shifts) depending on the viewing angle by overlapping thin films with different holograms, diffraction gratings, and optical properties. OVD is being developed.

  Since these OVDs give a unique impression such as a stereoscopic image and a color shift, they have an excellent decorative effect and have been used for general printed materials such as various packaging materials, picture books, catalogs and the like.

  In addition, since OVD requires advanced manufacturing technology, it is used as a part of or all of credit cards, securities, certificates, etc. as effective forgery prevention means.

  Recently, labels using OVD are affixed not only to securities but also to sporting goods, computer parts and other electrical products and software, and authentication labels that prove the authenticity of the products. It has come to be widely used as a sealing label that is used by being attached to a package.

  By the way, it has been pointed out that these authentication labels and seal labels are reused illegally after being peeled off from genuine products and then replaced with counterfeit products.

  Therefore, a brittle type that breaks when peeled from a genuine product has been proposed. In particular, a label having an OVD image is provided with a portion where the adhesion is partially strong and weak between the layers constituting the label (see Patent Documents 1 and 2), or an adhesive layer is partially provided between the layers constituting the label. For this reason (see Patent Document 3), an OVD image is easily broken when the label is peeled off.

No. 05-48210 Japanese Patent Laid-Open No. 08-152842 Japanese Patent Laid-Open No. 10-2222071

  By the way, the label having the OVD image as described above is configured such that when peeling or breakage occurs between layers or layers, the OVD is separated into the adhesive layer side and the support side, and the label is broken.

  However, due to the smoothness of the adherend and the nature of the adhesive, these label configurations have no difference in the appearance of the separated OVD on the adhesive layer side and the OVD on the support side when they are peeled off. If pasted so as to overlap, there is a problem that it is difficult to confirm at a glance with the one before peeling.

  Therefore, it is effective to prevent re-sticking, but when used as an opening certificate, if you peel off a part of the label and paste it on top of the original position, it is possible to identify the peeled-off one at a glance. was difficult.

  The present invention has been made paying attention to the above problems, and provides a forgery-preventing label that can be confirmed at a glance even if a part of the label is peeled off and superimposed on the original position. With the goal.

  In order to solve the above-mentioned problems, the invention corresponding to claim 1 is a label formed by sequentially laminating a release layer, an OVD layer, and an adhesive layer on a support, and the support has light transmittance. The release layer is made of a material, and one surface portion of the support is smoothly formed and the other surface portion of the support is formed in a mat shape, and the mat-like surface portion of the support is easily peeled off and has a high transparency. Then, the anti-counterfeit label is formed by sequentially laminating the OVD layer and the adhesive layer.

  According to the invention corresponding to the first aspect, when the label is peeled off, peeling occurs between the support and the peeling layer. The surface of the peeled release layer reproduces the mat shape of the support, and air having a different refractive index enters between the support and the release layer, so that the light diffuses on the mat surface and the OVD is difficult to see white and cloudy. Become. Therefore, there is a big difference in appearance from the one before peeling, and it becomes possible to distinguish what was peeled off at a glance.

  The invention corresponding to claim 2 is a label formed by sequentially laminating a release layer, an adhesive layer, an OVD layer, and an adhesive layer on a support, and the support is made of a light-transmitting material, The one surface portion of the support is formed smoothly and the other surface portion of the support is formed in a mat shape, and the release layer of a material having high transparency is easily applied to the mat surface portion of the support. Then, the anti-counterfeit label is formed by sequentially laminating the adhesive layer, the OVD layer, and the adhesive layer on the entire surface of the mat-like surface portion including the release layer.

  According to the invention corresponding to the second aspect, the support and the release layer are peeled off by partially applying the release layer of the material having a high transparency to the mat-like surface portion of the support. It can be easily confirmed that only part of the OVD is cloudy and peeled off.

  The invention corresponding to claim 3 is a label formed by sequentially laminating an adhesive layer, a release layer, an OVD layer, and an adhesive layer on a support, and the support is made of a light-transmitting material, One surface portion of the support is smoothly formed, and the other surface portion of the support is formed in a mat shape, and the adhesive layer is included after the adhesive layer is partially applied to the mat surface portion of the support. The anti-counterfeit label is formed by sequentially laminating the release layer, the OVD layer, and the adhesive layer made of a material having high transparency that is easily peeled off on the entire surface of the mat-like surface portion.

  According to the invention corresponding to the third aspect, it is possible to easily confirm that the support and the release layer are peeled off at the portion where the adhesive layer is not applied, and the OVD becomes white and cloudy only at that portion.

  Furthermore, the invention corresponding to claim 4 is a label formed by sequentially laminating a release layer, an OVD layer, a second release layer, and an adhesive layer on a support, and the support is a material having light permeability. The release layer is made of a material having a highly transparent material, in which one surface portion of the support is smoothly formed and the other surface portion of the support is formed in a mat shape and is easily peeled off on the entire surface of the support on the mat surface surface side. The OVD layer is sequentially laminated, and the second release layer is partially applied to the surface portion of the OVD layer, and then the adhesive layer is laminated on the entire surface of the OVD layer including the second release layer. It is a forgery prevention label characterized by comprising.

  According to the invention corresponding to claim 4, the second peeling layer portion is peeled to the support side, the portion without the second peeling layer is peeled to the adhesive layer side, and the outermost surface of the portion peeled to the adhesive layer side ( Light is scattered on the surface of the release layer), the OVD becomes white and turbid, and it can be easily confirmed that it has been peeled off.

  ADVANTAGE OF THE INVENTION According to this invention, even if a part of label is peeled off and it piles up in the original position, the forgery prevention label which can be confirmed at a glance can be provided.

Sectional drawing which shows the structure of one Embodiment of the forgery prevention label which concerns on this invention. Sectional drawing explaining the structure at the time of peeling the forgery prevention label shown in FIG. Sectional drawing which shows the structure of other embodiment of the forgery prevention label which concerns on this invention. Sectional drawing which shows the structure of other embodiment of the forgery prevention label which concerns on this invention. Sectional drawing which shows the structure of other embodiment of the forgery prevention label which concerns on this invention. Sectional drawing explaining the structure at the time of peeling the forgery prevention label shown in FIG.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a sectional view showing an embodiment of a forgery prevention label according to the present invention.
The anti-counterfeit label is configured by sequentially laminating the peeling layer 2, the OVD layer 3, and the adhesive layer 4 on the surface portion of the support 1.

  The support 1 is formed of a material having heat resistance and strength that does not soften and deform due to the hot pressure during label processing.

  Examples of the material for the support 1 include synthetic resins and natural resins such as polyvinyl chloride, polyester, polycarbonate, polymethyl methacrylate, polystyrene, polyethylene, polyethylene terephthalate, polyethylene naphthalate, polypropylene, and polyvinyl alcohol. In consideration of operability and workability, a thickness of about 25 to 100 μm is desirable.

  In addition, the support 1 needs to transmit a certain amount of light in order to observe OVD, and one surface needs to be a mat surface. For this purpose, a transparent film having a high light transmissivity, one side of which is matted by sanding or etching, or one coated with a matting coating material is used.

  Here, as a coating material, for example, a polyisocyanate is used as a crosslinking agent for thermoplastic resins such as acrylic resins, epoxy resins, cellulose resins, vinyl resins, acrylic polyols having a reactive hydroxyl group, polyester polyols, and the like. Addition, cross-linked urethane resin, thermosetting resin such as melamine resin, phenol resin, etc., ultraviolet light such as epoxy (meth) acryl, urethane (meth) acrylate or electron beam curable resin such as melamine having a particle diameter of about 5 nm to 20 μm Examples thereof include a material in which a resin filler such as urethane or an inorganic filler such as silica is dispersed.

  Furthermore, the matting degree of the support 1 is preferably 70% or more and a haze value of 10% to 80% according to JISK7105 measurement method A, and more preferably, all rays so that OVD diffracted light can be easily observed. It is desirable that the transmittance is 90% or more, the haze before matting treatment is 4% or less, the haze after matting treatment is 10% or more, and the haze value before matting is 20 times or more. Thus, if the difference between the haze values before matting and after matting is large, the difference in the turbidity of OVD before peeling and after peeling becomes large, and it becomes easy to confirm.

  The release layer 2 is easily peeled off from the support 1 and has a high transparency. Examples of the material include thermoplastic resins, thermosetting resins, ultraviolet rays or electron beam curable resins. For example, thermoplastic resins such as acrylic resins, epoxy resins, cellulose resins, and vinyl resins, and reactive resins. Addition of polyisocyanate as a crosslinking agent to acrylic polyol or polyester polyol having a hydroxyl group, crosslinked urethane resin, thermosetting resin such as melamine resin and phenol resin, epoxy (meth) acryl, urethane (meth) acrylate, etc. Ultraviolet or electron beam curable resins can be used alone or in combination.

  Therefore, the release layer 2 is formed so as to have a thickness of about 0.1 to 10 μm by coating the above polymer resin with a coating method or a printing method. That is, when the polymer resin as described above is applied to the matted surface of the support 1, the polymer resin enters the unevenness of the mat surface, so that light scattering is suppressed and a transparent feeling close to that before matting treatment is achieved. Can be obtained.

The release layer 2 may have the following configuration.
For example, as shown in FIG. 3, a structure in which the release layer 2 is partially applied in an arbitrary shape, or as shown in FIG. 4, the support 1 and the release layer 2 are partially bonded in an arbitrary shape. The structure which gave the layer 5 may be sufficient. In either case, when the label is to be peeled off, it is peeled off in an arbitrary pattern and destroyed.

  Next, the OVD layer 3 will be described. OVD is an image using light interference and diffraction, and is a display body that causes a color shift in which the color changes depending on the representation of a stereoscopic image and the viewing angle.

  The OVD layer 3 includes an OVD forming layer 31 and an OVD effect layer 32, and a relief hologram (diffraction grating) or a multilayer thin film type is widely used.

  First, as a relief type hologram (diffraction grating), a concavo-convex pattern of the hologram (diffraction grating) is formed on the OVD forming layer 31 by hot pressure, and the pattern is duplicated, so that thermoformability is required. . Examples of the material include the above-described thermoplastic resins, thermosetting resins, ultraviolet rays, and electron beam curable resins, and these can be used.

  The OVD effect layer 32 is made of a polymer material constituting the relief surface and a material having a different refractive index in order to increase the diffraction efficiency of the OVD image. The material used for the OVD effect layer 32 is a high refractive index material such as TiO2, Si2O3, SiO, Fe2O3, ZnS or the like having a different refractive index, or a metal material such as Al, Sn, Cr, Ni, Cu, or Au having a higher reflection effect. These materials are used singly or in layers.

  These materials are formed by a well-known thin film forming technique such as vacuum deposition or sputtering, and the film thickness varies depending on the application, but is formed to about 50 to 10,000 mm. In addition to these methods, a method of coating a coating material in which metal flakes are dispersed may be used, and a coating method may be provided partially.

  On the other hand, a multi-layer thin film type OVD is composed of multi-layer thin film layers having different optical characteristics, and is laminated as a metal thin film, a ceramic thin film, or a composite thin film formed by combining them. For example, when thin films having different refractive indexes are stacked, a high refractive index thin film and a low refractive index thin film may be combined, or a specific combination may be stacked alternately. These thin film layers are appropriately selected based on optical characteristics such as refractive index, reflectance, and transmittance, weather resistance, interlayer adhesion, and the like, and are laminated to form a multilayer thin film.

  The forming method can control the film thickness, the film forming speed, the number of stacked layers, or the optical film thickness (= n · d, n: refractive index, d: film thickness). Formed.

  The pressure-sensitive adhesive layer 4 is a layer for attaching and fixing an OVD label to an adherend, and a pressure-sensitive pressure-sensitive adhesive that is bonded by pressure is used. Examples include natural rubber, isoprene rubber, styrene-butadiene rubber, butyl rubber, and other rubber adhesives, acrylic adhesives such as ethyl acrylate, butyl acrylate, and ethyl hexyl acrylate, and urethane adhesives. It is formed to a thickness of about.

  Moreover, when the 2nd peeling layer 6 is provided in arbitrary patterns between the OVD effect layer 32 and the adhesion layer 4 as shown in FIG. 5 and it is going to peel off this label, it is destroyed like FIG. It is also possible to do.

  The material used for the second release layer 6 is a material that is easily peeled off from the OVD effect layer 32. The above-mentioned thermoplastic resin, thermosetting resin, ultraviolet ray or electron beam curable resin, these polymer resins, fillers, What added the material which accelerates | stimulates peeling, such as silicon, is used.

Next, the state when the label according to the present invention is peeled will be described with reference to FIGS.
2 is a cross-sectional view showing a state when the label of FIG. 1 is peeled off, and FIG. 6 is a cross-sectional view showing a state when the label of FIG. 5 is peeled off.

  As is clear from these drawings, the entire surface is peeled off between the support 1 and the release layer 2 (see FIG. 2) or partially peeled off (see FIG. 6). Yes. The uneven surface of the matte surface of the support 1 is restored on the surface of the release layer 2, and air having a different refractive index from that of the polymer resin enters the support 1 and the release layer 2. , And light is scattered between the air and the release layer 2, and the OVD appears white and cloudy. Thereby, since the appearance is significantly different from the state before peeling (FIG. 1) and the portion where the peeling layer 2 is not peeled (FIG. 6), it is possible to confirm at a glance that the peeling has occurred.

  Next, specific examples will be given and described in detail.

<Example 1>
The anti-counterfeit label according to the present invention shown in FIG. 1 was produced according to the following procedure.
First, the following processing was applied to the support 1 made of a transparent polyethylene terephthalate (PET) film (total light transmittance 90%, haze value 1%) having a thickness of 38 μm.

1) A matte surface was formed so that one side had a haze value of 20% by sandblasting.
2) Apply 2 μm of release layer 2 by gravure method.
3) Apply 2 μm of OVD forming layer 31 by gravure method.
4) Using a nickel-made press plate imposing the concavo-convex shape of the hologram, molding was performed by a roll embossing method.
5) As the OVD effect layer 32, a 50 nm aluminum metal thin film is formed on the entire surface by vacuum deposition.
6) The label which concerns on this invention was produced by apply | coating 20 micrometers of adhesives to release paper (separator) previously, and bonding together with said film.

[Peeling layer paint]
Acrylic resin ……………………………… 15 copies
Methyl ethyl ketone ……………………… 50 parts
Toluene 35 parts [OVD forming layer paint]
Vinyl chloride-vinyl acetate copolymer: 15 parts
Urethane resin ……………………………… 10 copies
Methyl ethyl ketone ……………………… 50 parts
Toluene …………………………………… 25 parts
[Adhesive layer paint]
Acrylic adhesive ………………………… 30 parts
Ethyl acetate ………………………………… 40 parts
Butyl acetate ………………………………… 30 parts
<Example 2>
About the forgery prevention label which concerns on this invention shown in FIG. 5, it produced according to the following procedures.
1) The support 1, the release layer 2, and the OVD layer 3 were formed in the same procedure as in Example 1.
2) The second release layer 6 is partially applied by 1 μm by a gravure printing method.
3) A label according to the present invention was prepared by applying 20 μm of an adhesive to a release paper (separator) in advance and pasting it onto the above film.

[Second release layer paint]
Nitrocellulose resin ……………………… 10 parts
Methyl ethyl ketone ………………………… 60 parts
Methyl isobutyl ketone 30 parts
<Comparative example>
As a comparative example, an anti-counterfeit label was prepared with the same configuration as in <Example 2> without matting a transparent polyethylene terephthalate (PET) film.
The processing method is the same as the above-described <Example 1> and <Example 2>.

Therefore, each of the OVD labels produced as described above was attached to an acrylic box (adhered body), the label was peeled off, and the peeled state was confirmed. After attaching the label, it was stored at room temperature for 1 day and then peeled off. This test resulted in the results shown in Table 1.

  As described above, when the label according to the present invention is peeled off, peeling occurs between the support and the peeling layer, and air having a different refractive index enters between them, so that light diffuses on the matted surface that is the boundary surface of the layers. , OVD appears white and cloudy. Therefore, there is a big difference in appearance from the one before peeling, and it is possible to distinguish what was peeled off at a glance.

  In addition, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention.

  DESCRIPTION OF SYMBOLS 1 ... Support body, 2 ... Release layer, 3 ... OVD layer, 31 ... OVD formation layer, 32 ... OVD effect layer, 4 ... Adhesive layer, 5 ... Adhesive layer, 6 ... 2nd release layer.

Claims (5)

A label formed by sequentially laminating a release layer, an OVD layer, and an adhesive layer on a support,
The support is made of a light-transmitting material, one side of the support is smoothly formed, and the other side of the support has a haze value of 10% to 80%, and is matted. It is formed in a mat shape so as to be 20 times or more of the previous haze value ,
After having been subjected to the release layer of a material easily peeled off the mat-like surface side of the support, the OVD layer, Ri formed by the adhesive layer sequentially laminated,
The anti-counterfeit label , wherein the release layer is formed of a material selected from the group consisting of a thermoplastic resin, a thermosetting resin, and an ultraviolet ray or an electron beam curable resin . A label formed by sequentially laminating a release layer, an adhesive layer, an OVD layer, and an adhesive layer on a support,
The support is made of a light-transmitting material, one side of the support is smoothly formed, and the other side of the support has a haze value of 10% to 80%, and is matted. It is formed in a mat shape so as to be 20 times or more of the previous haze value ,
The release layer made of a material that easily peels off is partially applied to the mat-like surface portion side of the support, and then the adhesive layer, the OVD layer, and the adhesive layer are sequentially laminated on the entire surface of the mat-like surface portion including the release layer. Ri formed by,
The anti-counterfeit label , wherein the release layer is formed of a material selected from the group consisting of a thermoplastic resin, a thermosetting resin, and an ultraviolet ray or an electron beam curable resin . A label formed by sequentially laminating an adhesive layer, a release layer, an OVD layer, and an adhesive layer on a support,
The support is made of a light-transmitting material, one side of the support is smoothly formed, and the other side of the support has a haze value of 10% to 80%, and is matted. It is formed in a mat shape so as to be 20 times or more of the previous haze value ,
The adhesive layer is partially provided on the mat-like surface portion side of the support, and then the release layer, the OVD layer, and the adhesive layer of a material that is easily peeled off are sequentially laminated on the entire surface of the mat-like surface portion including the adhesive layer. Ri formed by,
The anti-counterfeit label , wherein the release layer is formed of a material selected from the group consisting of a thermoplastic resin, a thermosetting resin, and an ultraviolet ray or an electron beam curable resin . A label formed by sequentially laminating a release layer, an OVD layer, a second release layer, and an adhesive layer on a support,
The support is made of a light-transmitting material, one side of the support is smoothly formed, and the other side of the support has a haze value of 10% to 80%, and is matted. It is formed in a mat shape so as to be 20 times or more of the previous haze value ,
The release layer and the OVD layer, which are easily peeled off, are sequentially laminated on the entire surface of the support on the mat-like surface portion side, and the second release layer is partially applied to the surface portion of the OVD layer. peeling layer Ri formed by laminating the adhesive layer on the entire surface of the OVD layer surface comprising,
The anti-counterfeit label , wherein the release layer is formed of a material selected from the group consisting of a thermoplastic resin, a thermosetting resin, and an ultraviolet ray or an electron beam curable resin . The thermoplastic resin is selected from the group consisting of an acrylic resin, an epoxy resin, a cellulose resin, and a vinyl resin, and the thermosetting resin crosslinks a polyisocyanate to an acrylic polyol or polyester polyol having a reactive hydroxyl group. Selected from the group consisting of urethane resin, melamine resin and phenolic resin added and crosslinked as an agent, and the ultraviolet ray or electron beam curable resin is selected from the group consisting of epoxy (meth) acrylate and urethane (meth) acrylate The forgery prevention label according to any one of claims 1 to 4, wherein the forgery prevention label is provided.

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