JP3915479B2 - Anti-sticking sticker and anti-sticking method - Google Patents

Description

【００４６】
尚、いずれの実施例においても剥離剤を用いてもシールを剥がすことができなかった。
【００４７】
【発明の効果】
このように本発明の貼り替え対策シールは、熱を加え、接着層を軟化させ剥がそうと試みると、発泡層が発泡し、ＯＶＤ層が破壊してしまう。それゆえ、熱による貼り替えを未然に防止することが可能であり、仮にシールが剥がされて再利用されるという不正行為が行われても、その不正行為は容易に発見できる。
【図面の簡単な説明】
【図１】Ａは、実施例１の加熱前の断面図。
Ｂは、実施例１の加熱後の断面図。
【図２】Ａは、実施例２の加熱前の断面図。
Ｂは、実施例２の加熱後の断面図。
【図３】Ａは、実施例３の加熱前の断面図。
Ｂは、実施例３の加熱後の断面図。
【図４】本発明シールの第１の基本構成例を表わす断面図。
【図５】本発明シールの第２の基本構成例を表わす断面図。
【符号の説明】
１…支持体
２…ＯＶＤ層
２ａ…ＯＶＤ形成層
２ｂ…ＯＶＤ効果層
３…接着層
３４…発泡接着層
４…発泡層
５…剥離層[0001]
BACKGROUND OF THE INVENTION
The present invention relates to measures for preventing fraud such as re-sealing of seals typified by seal seals and authentication seals, and making it easy to identify whether the fraud has been done. Used an anti-replacement sticker that uses OVD, which changes its color and image depending on the direction of light, including holograms, as a display body that gives the sticker a decorative and anti-counterfeit effect, and the anti-replacement sticker. It is related with the technique of the countermeasure against re-sticking.
[Prior art]
[0002]
In recent years, three-dimensional images and special decorative images can be expressed using light interference, and holograms, diffraction gratings, or thin films with different optical properties are stacked in multiple layers, causing a color change (color shift) depending on the viewing angle. OVD (Optical Variable Device) such as multilayer thin film has been used as an anti-counterfeit item in various fields because of its decorativeness and high anti-counterfeit effect. The use as a seal is not necessarily limited, but it is affixed to sports goods, computer parts, electrical products, software products, etc. It has come to be widely used as a sealing sticker.
[0003]
[Problems to be solved by the invention]
These authentication stickers and seal stickers using OVD are difficult to duplicate the same because OVD is difficult to manufacture, and duplication and imitation can be effectively prevented. However, there is an anxiety that the counterfeiting is performed by removing the seal from the real article and replacing it with the fake one.
Various inventions have been made for this forgery method. According to actual No. 2032258, a layer using a brittle material is provided in a part of the structure, and if it is forcibly removed, the part is broken as a trigger. Moreover, according to actual No. 2594367, the thing of the type which, when trying to peel, only a support body peels and breaks is proposed.
All of these techniques are designed to break with a force weaker than the adhesive force of the adhesive, but by melting or softening the adhesive with heat, the adhesive force or cohesive force is extremely reduced, There is a risk of peeling.
[0004]
As described above, the present invention prevents the illegal act that the seal is peeled off and reused by dissolving or softening the adhesive layer by heating, and the seal is peeled off and reused. It is an object to make it easy to find illegal acts even if they are carried out.
[0005]
[Means for Solving the Problems]
[0006]
In order to achieve the above object in the present invention, first, in the invention described in claim 1, on the support using the polymer resin material, at least a display layer on the side close to the support is provided with the support. An adhesive layer is laminated on the side far from the seal, and when it is peeled off from an article attached through the adhesive layer, it is a seal that is completely or partially destroyed,
The adhesive layer is foamed by heating to provide an anti-replacement seal.
[0007]
In the invention of claim 2, on the support using the polymer resin material, at least a display body layer is laminated on the side close to the support and an adhesive layer is laminated on the side far from the support, A seal that is wholly or partially destroyed when an attempt is made to peel off an article that has been applied through an adhesive layer,
A foam layer which is foamed by heating is provided over the entire surface or a part of the seal between at least one of the support and the display layer or between the display and the adhesive layer. This is a sticker for anti-replacement characterized by the above.
[0008]
According to a third aspect of the present invention, the display body layer is an OVD layer using OVD, and the anti-sticking sticker according to the first or second aspect is provided.
[0009]
Further, in the invention of claim 4, by using the re-seal countermeasure sticker according to any one of claims 1 to 3, re-sampling countermeasures for preventing re-staking or for discovering that re-staking has been performed. The method of
When the anti-replacement sticker attached to the article through the adhesive layer is heated, the expansion due to the foaming occurs, and the anti-replacement seal is completely or partially broken, The anti-replacement sticker is a method of anti-replacement characterized by utilizing the fact that a trace peeled off by heating is formed.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0011]
The anti-sticking sheet of the present invention is basically composed of a support 1, an OVD layer 2 and an adhesive layer 3, as shown in FIG. When a relief hologram is used for OVD, the OVD layer 2 includes an OVD formation layer 2a and an OVD effect layer 2b as shown in FIG. When a multilayer thin film method is used for OVD, the OVD layer 2 itself is also an OVD effect layer.
[0012]
1-3 is a figure which shows the structural example of the sticking countermeasure sticker of this invention, respectively. In the figure, (A) is a state before peeling, and (B) in the figure shows a state of destruction that occurs when heat is applied and peeling is attempted.
[0013]
1 to 5, there is an article (not shown) on the lower side of the adhesive layer 3 in the drawing, and the anti-replacement seal is adhered to the article via the adhesive layer 3.
[0014]
The anti-replacement seal in FIG. 1 is configured to have a foamed adhesive layer 34 using a material in which a foaming agent is mixed in the adhesive layer 3, and when heat is applied, the heated part foams and rises. Is changed, and the support is peeled off.
[0015]
The anti-sticking stickers shown in FIGS. 2 and 3 are obtained by partially forming the foam layer 4. Since the foamed layer 4 foams and rises when heated, it can prevent the change of the appearance of the anti-replacement seal or the OVD layer 2 itself from being used again.
[0016]
Hereinafter, embodiments will be described in detail with reference to these drawings.
The support 1 only needs to have heat resistance and strength that does not soften and deform due to the heat pressure during the sealing process. Examples of the material of the support 1 include polyvinyl chloride, polyester, polycarbonate, polymethyl methacrylate, polystyrene, polyethylene, polyethylene terephthalate, polyethylene naphthalate, polypropylene, polyvinyl alcohol, and other synthetic resins, natural resins, paper, synthetic paper, and the like. Single or complex can be used. Moreover, the thermoplastic resin is used as the support 1 by coating the above-mentioned tough film with a soft thermoplastic resin, and removing the film portion after the intermediate product or seal of the processing is attached to the thermoplastic resin. Is also possible. The thickness of the support 1 is preferably about 25 to 50 μm in consideration of operability and workability.
[0017]
Next, the OVD layer 2 will be described.
The OVD is an image using light interference, and is a display body that causes a color shift in which the color changes depending on the representation of the stereoscopic image and the viewing angle. Among them, examples of OVDs such as holograms and diffraction gratings include a relief type for recording light interference fringes on a plane as a fine uneven pattern and a volume type for recording interference fringes in the volume direction. On the other hand, a multilayer film system in which a thin film made of ceramics or a metal material having different optical characteristics and a method different from that of a hologram or a diffraction grating is laminated to cause a color change (color shift) depending on the viewing angle is an example.
Among these OVDs, in consideration of mass productivity and cost, a relief hologram (diffraction grating) or a multilayer thin film type is preferable, and these OVDs are generally widely used.
Hereinafter, a case where a relief hologram is used for the OVD layer 2 and a case where a multilayer thin film method is used will be described in order.
[0018]
Relief-type holograms (diffraction gratings) are produced by producing a relief-type master plate consisting of fine concavo-convex patterns by an optical photographing method, and mass-producing them on nickel press plates in which the patterns are duplicated by electroplating. That is, this press plate is heated and pressed against the OVD forming layer 2a to replicate the uneven pattern.
[0019]
The OVD formation layer 2a is required to have a performance of being moldable by a press plate, and the material thereof may be any of a thermoplastic resin, a thermosetting resin, an ultraviolet ray, or an electron beam curable resin. For example, urethanes added with polyisocyanate as a crosslinking agent to thermoplastic resins such as acrylic resins, epoxy resins, cellulose resins, vinyl resins, acrylic polyols and polyester polyols having reactive hydroxyl groups, etc. Resins, thermosetting resins such as melamine resins and phenol resins, and ultraviolet or electron beam curable resins such as epoxy (meth) acryl and urethane (meth) acrylate can be used alone or in combination. Other than the above, any known material that can form an OVD image can be used.
[0020]
The OVD effect layer 2b is made of a material having a refractive index different from that of the polymer material constituting the relief surface in order to increase the diffraction efficiency of the OVD image. Materials used include high refractive index materials such as TiO ₂ , Si ₂ O ₃ , SiO, Fe ₂ O ₃ , and ZnS having different refractive indexes, and Al, Sn, Cr, Ni, Cu, Au, and the like having higher reflection effects. These materials can be used, and these materials can be used alone 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 at about 50 to 10,000 mm.
[0021]
These OVD effect layers 2b can be formed by removing arbitrary portions or can be removed. Below, the example of the method of providing the OVD effect layer 2b partially is given. First, a method of printing a pattern with an ink using a water-soluble resin on the OVD forming layer 2a, providing the OVD effect layer 2b, and then washing the water-soluble ink portion can be mentioned. Further, it is also possible to use a technique in which masking printing is performed after the OVD effect layer 2b is provided, and then the OVD effect layer 2b is partially dissolved and removed with an alkali or acidic chemical. Any other technique can be used as long as it is a known technique such as a laser removal method.
Thus, by providing an effect layer partially, the designability can be improved.
On the other hand, when an adhesive or the like that promotes curing with ultraviolet rays or electron beams is used for the adhesive layer 3, light does not pass through a portion where the OVD effect layer 2 b is present, and curing cannot be expected, but a portion where the OVD effect layer 2 b is not present Then it is possible for light to cure. When this structure is peeled off, a part of the structure is easily peeled off and a part of the structure is hardly peeled off, and an effect of partial destruction can be expected.
[0022]
On the other hand, when the multilayer thin film method is used, as described above, the OVD layer 2 is composed of a multilayer thin film layer having different optical aptitudes, and is formed by laminating 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. By combining them, a desired multilayer thin film can be obtained.
This multilayer thin film layer is made of a material such as ceramics or metal, and is formed by laminating approximately two or more high refractive index materials and a low refractive index material having a refractive index of about 1.5 with a predetermined film thickness. An example of the material used below is given. First, as ceramics, Sb ₂ O ₃ (3.0 = refractive index n: the same applies hereinafter), Fe ₂ O ₃ (2.7), TiO ₂ (2.6), CdS (2.6), CeO ₂ (2.3), ZnS (2.3), PbCl ₂ (2.3), CdO (2.2), Sb ₂ O ₃ (2.0), WO ₃ (2.0), SiO (2. 0), Si ₂ O ₃ (2.5), In ₂ O ₃ (2.0), PbO (2.6), Ta ₂ O ₃ (2.4), ZnO (2.1), ZrO ₂ ( 2.0), MgO (1.6), SiO ₂ (1.5), MgF ₂ (1.4), CeF ₃ (1.6), CaF ₂ (1.3 to 1.4), AlF ₃ (1.6), Al ₂ O ₃ (1.6), GaO (1.7), etc., and a thin film of a single metal or an alloy, such as Al, Fe, Mg, Zn, Au, Ag, Cr, Ni, Cu, Si, etc. . Examples of the low refractive index organic polymer include polyethylene (1.51), polypropylene (1.49), polytetrafluoroethylene (1.35), polymethyl methacrylate (1.49), polystyrene (1. 60). By absorbing at least one kind from these high refractive index materials or 30% to 60% transparent metal thin films and at least one kind from low refractive index materials and alternately laminating them with a predetermined thickness, absorption of visible light of a specific wavelength is achieved. Or it comes to show reflection.
[0023]
Each of the above materials is appropriately selected based on optical properties such as refractive index, reflectance, and transmittance, weather resistance, interlayer adhesion, and the like, and is laminated as a thin film to form a multilayer thin film. A known method can be used as the formation method, and the film thickness, film formation speed, number of layers, or optical film thickness (= n · d, n: refractive index, d: film thickness) can be controlled. The vacuum evaporation method and the sputtering method are used.
[0024]
The adhesive layer 3 is a layer for attaching and fixing the anti-replacement sticker to the adherend, and a pressure-sensitive type that is adhered by pressure or a heat-sensitive type that is applied while applying heat is used.
Examples of the former pressure-sensitive adhesive include natural rubber, isoprene rubber, styrene-butadiene rubber, butyl rubber, and other rubber adhesives, and acrylic adhesives such as ethyl acrylate and butyl acrylate. Any polyester or vinyl resin having a low glass transition point that has adhesiveness at room temperature can be used if it has pressure sensitive adhesiveness. On the other hand, examples of the heat-sensitive adhesive include thermoplastic resins such as acrylic resins, urethane resins, epoxy resins, polyester resins, and vinyl resins, but are not limited thereto. .
[0025]
Examples of the foaming agent include a microcapsule type containing a material that foams inside the polymer resin, a substance that easily vaporizes, and an inorganic or organic compound type that generates gas by heat.
The microcapsule type has a resin binder such as vinyl resin, acrylic resin, and polyester resin for the outer shell layer, and azodicarbonamide, diazoaminobenzene, azodihexahydroxybenzonitrile, 4,4-oxybenzene for the core material. Organic foaming material such as sulfonyl hydrazide, azoisobutyl nitrile, dinitroso pentamethylene tetramine, paratoluene sulfonyl hydrazide, or an inert gas, active gas such as normal-butane or iso-butane, or one or more vaporizable liquids are included. Examples include thermoplastic microcapsules having an average particle diameter of 1 to 100 μm. On the other hand, the compound types are inorganic materials such as sodium bicarbonate, ammonium carbonate, ammonium bicarbonate and ammonium nitrite, nitroso compounds such as DTP and DMDNTA, sulfonic acid hydrazine compounds such as BSH, TSH, DPSDSH and OBSH, ADCA Organic polymer compounds such as (ABFA), AIBN, DAB, barium-azodicarboxylate, trihydrazinotriazine, p-toluenesulfonyl semicarbazide, azo of 4,4-oxybenzenesulfonyl semicarbazide, diazo compounds, etc. It is done.
[0026]
In the case of the foamed adhesive layer 34 in which the adhesive layer 3 itself foams as shown in FIG. 2, the foaming agent is mixed with the adhesive and used. On the other hand, in the type in which the foamed layer 4 is provided as shown in FIGS. 3 and 4, the foaming agent is mixed into a thermoplastic resin as a binder and formed by printing or various coating techniques. The binder material used is polyester resin, polyurethane resin, acrylic resin, cellulose resin, chlorinated propylene resin, vinyl chloride-vinyl acetate copolymer, epoxy resin, polystyrene or polystyrene acrylate, rubber resin And the like.
[0027]
On the other hand, the peeling layer 5 is a layer provided so that the whole or a part is peeled off when the seal is peeled off, and the seal is broken, and is not limited to the configuration example of FIG. Even in this configuration example, it can be provided between the layers as appropriate. The material of the release layer 5 may be any of a thermoplastic resin, a thermosetting resin, an ultraviolet ray, or an electron beam curable resin as long as it is a material that can be peeled between layers. Examples include thermoplastic polyacrylate resins, chlorinated rubber resins, vinyl chloride-vinyl acetate copolymer resins, cellulose resins, chlorinated polypropylene resins, epoxy resins, polyester resins, nitrocellulose resins, styrene. Thermoplastic resins such as acrylate-based resins, polyether-based resins, and polycarbonate-based resins, urethane-based cured resins, thermosetting resins such as melamine-cured resins and epoxy-cured resins, epoxy (meth) acryl, urethane (meth) acrylate, etc. And ultraviolet ray or electron beam curable resin.
In addition, in consideration of releasability, various waxes such as petroleum wax and plant wax, metal salts of higher fatty acids such as stearic acid, mold release agents such as silicone oil, Teflon (registered trademark) powder, polyethylene powder, silicone Organic fillers such as system fine particles and acrylonitrile-based fine particles and inorganic fillers such as silica fine particles can be added to reduce the cohesive force of the layer itself and make it easy to break. The release layer 5 may be provided between the support 1 and the OVD layer 2 or between the OVD layer 2 and the adhesive layer 3 so as to be easily broken when being peeled off.
[0028]
The above description has been made on the anti-sticking sticker of the present invention based on the structure in which the support 1, the OVD layer 2, and the adhesive layer 3 are laminated in the simplest configuration. This configuration is a basic configuration, and it is a well-known counterfeit that allows each layer to be colored or a printed layer provided between the layers to improve design, and to verify ultraviolet / infrared light-emitting inks and infrared absorbing inks. It is also possible to appropriately form a printing layer using a prevention ink and enhance the forgery prevention effect according to the purpose. Further, in order to further prevent peeling, it is possible to add a cut to the seal.
[0029]
【Example】
Hereinafter, embodiments of the present invention will be described specifically and in detail.
[0030]
<Example 1>
First, a release layer 5 having the following composition was applied to a support 1 made of a transparent polyethylene terephthalate (PET) film having a thickness of 25 μm, and a holo layer (OVD effect layer 2a) was applied by a 5 μm gravure method. Next, an OVD relief pattern was formed on the holo layer by a roll embossing method, and then an Al vapor-deposited thin film layer (OVD effect layer 2b) having a thickness of 0.05 μm was provided by using a vacuum vapor deposition method. Then, 20 μm of an adhesive having the following composition was provided as the adhesive layer 3 by a comma coating method, and a release paper was laminated to prepare a repositioning countermeasure seal shown in FIG.
[0031]
[Peeling layer paint]
Acrylic resin …………………………………………… 15 parts methyl ethyl ketone …………………………………… 55 parts toluene …………………………… …………………… 30 copies [0032]
[OVD forming layer paint]
Vinyl chloride-vinyl acetate copolymer …………………… 15 parts urethane resin ……………………………………………… 10 parts methyl ethyl ketone ………………………… ………… 50 parts Toluene …………………………………………………… 25 parts 【0033】
[Adhesive layer paint]
Acrylic adhesive ………………………………………… 50 parts nitroso compound (foaming temperature 90 ° C. with auxiliary agent)… 10 parts ethyl acetate ……………………………… ……………… 40 copies 【0034】
<Example 2>
First, a foam layer 4 is formed on a support 1 made of a transparent polyethylene terephthalate (PET) film having a thickness of 25 μm by applying 2 μm of a foam layer paint having the following composition in a pattern, and a holo layer (OVD forming layer 2a) is formed by a gravure method. Then, after forming an OVD relief pattern by a roll embossing method, an Al vapor-deposited thin film layer (OVD effect layer 2b) having a film thickness of 0.05 μm was provided by using a vacuum vapor deposition method. Thereafter, a pressure-sensitive adhesive having the following composition was provided as an adhesive layer 3 by 20 μm by a comma coating method, a release paper was laminated, and a repositioning countermeasure seal shown in FIG.
[0035]
[Foaming layer paint]
Acrylic resin ……………………………………………… 10 parts nitroso compound (foaming temperature 90 ° C with auxiliary) …… 10 parts methyl ethyl ketone ……………………………… ............ 80 copies [0036]
[OVD forming layer paint]
Vinyl chloride-vinyl acetate copolymer ………………… 15 parts urethane resin ……………………………………………… 10 parts methyl ethyl ketone …………………… ………………… 50 parts Toluene …………………………………………………… 25 parts [0037]
[Adhesive layer paint]
Acrylic adhesive ………………………………………… 60 parts ethyl acetate …………………………………………………… 40 parts 【0038】
<Example 3>
First, a holo layer (OVD formation layer 2a) having the following composition is applied to a support 1 made of a transparent polyethylene terephthalate (PET) film having a thickness of 25 μm by a gravure method and an OVD relief pattern is formed by a roll embossing method. Then, an Al vapor-deposited thin film layer (OVD effect layer 2b) having a film thickness of 0.05 μm was provided by using a vacuum vapor deposition method. Next, after 2 μm of foam layer 4 having the following composition was applied in a pattern, 20 μm of adhesive having the following composition was provided as adhesive layer 3 by a comma coating method, release paper was laminated, and FIG. The anti-sticking sticker shown was made.
[0039]
[OVD forming layer paint]
Vinyl chloride-vinyl acetate copolymer ………………… 15 parts urethane resin ……………………………………………… 10 parts methyl ethyl ketone …………………… ………………… 50 parts Toluene …………………………………………………… 25 parts 【0040】
[Foaming layer paint]
Acrylic resin ……………………………………………… 10 parts nitroso compound (foaming temperature 90 ° C with auxiliary) …… 10 parts methyl ethyl ketone ……………………………… ............ 80 copies [0041]
[Adhesive layer paint]
Acrylic adhesive ………………………………………… 60 parts ethyl acetate …………………………………………………… 40 parts 【0042】
<Comparative example>
After producing a sheet on which the OVD layer 2 was formed by the same method as in Example 1, an adhesive having the following composition was provided with a thickness of 20 μm by a comma coating method, release paper was laminated, and an OVD seal was produced. Next, half punching and scrap removal were performed to obtain an OVD seal of a comparative example.
[0043]
[Adhesive layer paint]
Acrylic adhesive ………………………………………… 55 parts ethyl acetate ………………………………………… 55 parts 【0044】
The sticking countermeasure seals of Examples 1 to 3 obtained as described above and the OVD seal of Comparative Example 1 were each put on a corrugated cardboard serving as an adherend, placed on a hot plate, and sealed while being heated. Tried to remove.
The results are shown in Table 1 below.
[0045]
[Table 1]

[0046]
In any of the examples, the seal could not be removed even when a release agent was used.
[0047]
【The invention's effect】
As described above, when the anti-replacement seal of the present invention is applied with heat to soften and peel off the adhesive layer, the foam layer foams and the OVD layer is destroyed. Therefore, it is possible to prevent re-applying by heat, and even if an illegal act of removing the seal and reused is performed, the illegal act can be easily detected.
[Brief description of the drawings]
FIG. 1A is a cross-sectional view of Example 1 before heating.
B is a cross-sectional view after heating in Example 1. FIG.
FIG. 2A is a cross-sectional view of Example 2 before heating.
B is a cross-sectional view after heating in Example 2. FIG.
3A is a cross-sectional view of Example 3 before heating. FIG.
B is a sectional view of Example 3 after heating.
FIG. 4 is a sectional view showing a first basic configuration example of the seal of the present invention.
FIG. 5 is a sectional view showing a second basic configuration example of the seal of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Support body 2 ... OVD layer 2a ... OVD formation layer 2b ... OVD effect layer 3 ... Adhesive layer 34 ... Foam adhesive layer 4 ... Foam layer 5 ... Release layer

Claims (4)

On the support using the polymer resin material, at least a display body layer is laminated on the side close to the support and an adhesive layer is laminated on the side far from the support, and the adhesive layer is pasted through the adhesive layer. A seal that is completely or partially destroyed when it is peeled off
An anti-replacement seal, wherein the adhesive layer is foamed by heating. A display layer is laminated on a support using a polymer resin material, at least on the side close to the support, and an adhesive layer is laminated on the side far from the support, and is pasted via the adhesive layer. A seal that is completely or partially destroyed when it is peeled off
A foam layer which is foamed by heating is provided on the entire surface or a part of the seal between at least one of the support and the display body layer or between the display body layer and the adhesive layer. An anti-sticking sticker characterized by. The re-sticking countermeasure seal according to claim 1, wherein the display body layer is an OVD layer using OVD. A method of anti-reposition measures for preventing re-installation or discovering that re-application has been performed using the anti-re-installation seal according to any one of claims 1 to 3,
When the anti-replacement sticker attached to the article through the adhesive layer is heated, the expansion due to the foaming occurs, and the anti-replacement seal is completely or partially broken, An anti-replacement method, characterized in that the anti-replacement seal is formed by forming a trace peeled off by heating.

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