JP4870512B2 - Anti-counterfeit pressure-sensitive adhesive sheet and method for producing the same - Google Patents

Description

  The present invention relates to an anti-counterfeit pressure-sensitive adhesive sheet that can be used to prevent counterfeiting / tampering of documents, photographs, printed matter, seals, paintings, drawings, etc. used for passports, stamps, seal certificates and other certificates, and a method for producing the same. It is about.

  Conventionally, anti-counterfeit sheets are known in which a transparent release agent layer is partially provided on the back surface of a transparent tape base material, and a metal vapor deposition layer and an adhesive layer are sequentially formed on the entire back surface. Yes. Moreover, as disclosed in Patent Document 1, a release agent layer is partially provided on the back surface of the transparent plastic film substrate, and a printed pattern is printed on the back surface and the release agent layer, and further, an adhesive is adhered on the print pattern. What provided the agent layer is known.

  When these anti-counterfeit sheets are peeled off after being applied to the adherend, a part of the release agent layer, metal deposition layer or printed pattern and adhesive layer remain on the adherend surface. It can be confirmed that the prevention sheet has been removed.

  In addition, after peeling off a part of the anti-counterfeit sheet, even if this is pasted again, air is sealed between the base material and the release agent layer, or the metal vapor deposition layer and the printed pattern change. It can be seen that the initial pasting state could not be substantially restored and it was once peeled off.

  However, since these anti-counterfeit sheets require an opaque layer such as a metal vapor deposition layer, they cannot be used for covering and pasting a passport photograph, for example.

  In order to improve this, an adhesive sheet for a passport described in Patent Document 2 has been proposed. This pressure sensitive adhesive sheet for passports partially forms a transparent release agent layer on the back surface of the transparent film substrate, and provides a print surface layer on the back surface of the release agent layer. A transparent pressure-sensitive adhesive layer is applied to the entire surface over the remainder and the above layer.

  However, in this passport pressure-sensitive adhesive sheet, when all the transparent film base material is peeled off and a new transparent film is attached again, it becomes almost the same state as before peeling, and it may be difficult to confirm forgery.

On the other hand, as an anti-counterfeit sheet, a sheet in which a fluorescent release layer is partially provided by printing or the like has been proposed (Patent Document 3). In this anti-counterfeit sheet, the presence or absence of tampering is determined by the fluorescent release layer remaining on the adherend after the sheet is peeled off and fluorescently colored by ultraviolet irradiation.
Japanese Utility Model Publication No. 46-4432 No. 3-7372 Japanese Patent Laid-Open No. 11-38880

  However, the conventional anti-counterfeit sheet provided with a fluorescent release layer has a large color development area, so the presence of the fluorescent release layer can be easily confirmed and it may be noticed that it is for anti-counterfeit. . In addition, with the recent development of printing technology, the printing of the fluorescent release layer can be relatively easily imitated.

  The present invention has been made in view of such a situation, and an object of the present invention is to provide an anti-counterfeit pressure-sensitive adhesive sheet which is difficult to understand for counterfeiting and difficult to counterfeit, and a method for manufacturing the same.

In order to achieve the above object, first, the present invention includes an ultraviolet color forming layer that develops color upon irradiation with ultraviolet rays, and a through-hole that has a pore diameter of 300 μm or less and through which ultraviolet rays can pass. The other portion includes an ultraviolet light passage control layer that shields ultraviolet light, and provides the anti-counterfeit pressure-sensitive adhesive sheet , wherein the ultraviolet light passage control layer is transparent ( Invention 1).

  In this specification, “sheet” includes the concept of film, and “film” includes the concept of sheet.

When the anti-counterfeit pressure-sensitive adhesive sheet according to the invention ( Invention 1) is irradiated with ultraviolet rays, the ultraviolet rays pass through the through holes of the ultraviolet ray passage control layer and reach the ultraviolet coloring layer, and the ultraviolet coloring layer depends on the diameter of the through holes. Color develops with fine dots. If color development is seen with such fine dots, it is confirmed that the anti-counterfeit pressure-sensitive adhesive sheet and the adherend are genuine. Since the diameter of the through hole is as fine as 300 μm or less, the presence of the through hole is difficult to visually confirm, and it is difficult to understand that the anti-counterfeit pressure-sensitive adhesive sheet is for anti-counterfeit. Moreover, it is very difficult to develop fine dots by color printing, and therefore, the anti-counterfeit pressure-sensitive adhesive sheet is difficult to imitate.

In the said invention ( invention 1), it is preferable that the said forgery prevention adhesive sheet is transparent in the state affixed on the to-be-adhered body ( invention 2). Here, “transparent” means that characters, patterns, colors, etc. present on the surface of the adherend are visible through the anti-counterfeit pressure-sensitive adhesive sheet. According to this anti-counterfeit adhesive sheet, the surface of the adherend to which the anti-counterfeit adhesive sheet is affixed can be seen, so this anti-counterfeit adhesive sheet can be used for, for example, a photo of a certificate such as a passport or a notification from a financial institution. It can be used for a sheet that covers the imprint of a mark.

In the said invention (invention 1 and 2), it is preferable that the surface roughness (Rz) of the said forgery prevention adhesive sheet is 3.0 to 6.0 micrometer (invention 3).

According to the said invention ( invention 3 ), since a through-hole becomes difficult to see, it becomes harder to understand that this anti-counterfeit pressure-sensitive adhesive sheet is for anti-counterfeit.

In the said invention ( invention 1-3 ), it is preferable that the through-hole of the said ultraviolet-ray passage control layer is formed in multiple numbers by the predetermined arrangement | sequence ( invention 4 ). Thereby, the authenticity of the anti-counterfeit pressure-sensitive adhesive sheet can be easily confirmed. That is, if the anti-counterfeit pressure-sensitive adhesive sheet (ultraviolet color-developing layer) irradiated with ultraviolet rays is colored with a predetermined dot arrangement, it can be confirmed that the anti-counterfeit pressure-sensitive adhesive sheet is genuine.

Secondly, the present invention is provided with an ultraviolet coloring layer that develops color upon irradiation with ultraviolet rays, and a through-hole that has a pore diameter of 300 μm or less and through which ultraviolet rays can pass, and the portions other than the through-holes block ultraviolet rays. An anti-counterfeit pressure-sensitive adhesive sheet comprising an ultraviolet ray passage control layer, wherein the ultraviolet ray passage control layer is transparent, wherein the through hole is formed in the ultraviolet ray shielding layer for shielding ultraviolet rays, thereby passing the ultraviolet ray Provided is a method for producing an anti-counterfeit pressure-sensitive adhesive sheet comprising a step of forming a control layer ( Invention 6 ).

According to the said invention ( invention 6 ), the forgery prevention adhesive sheet mentioned above can be manufactured easily. As the “ultraviolet coloring layer”, for example, a resin film or a pressure-sensitive adhesive containing a fluorescent agent can be used, and as the “ultraviolet shielding layer”, for example, a resin film or a coating agent containing an ultraviolet absorber. Or an adhesive can be used.

In the said invention ( invention 6 ), it is preferable to form the said through-hole by laser processing ( invention 7 ). According to laser processing, it is possible to easily form fine through holes with a desired arrangement that are difficult to imitate except by laser processing. Further, the processing laser is a very expensive device, and its condition setting is difficult, and it is difficult to form a through-hole having the same shape. Therefore, the anti-counterfeit pressure-sensitive adhesive sheet is difficult to be imitated. .

In the said invention ( invention 1-4 ), the said anti-counterfeit adhesive sheet is equipped with the adhesive layer, the said adhesive layer may make it comprise the said ultraviolet-ray color layer (invention 5), and the said adhesive The agent layer may constitute the ultraviolet ray passage control layer. The anti-counterfeit pressure-sensitive adhesive sheet includes a base material, and the base material may constitute the ultraviolet light passage control layer, or the base material may constitute the ultraviolet color developing layer. Good. Furthermore, the forgery-preventing pressure-sensitive adhesive sheet may be provided with a surface coat layer, and the surface coat layer may constitute the ultraviolet ray passage control layer.

  According to the present invention, it is possible to obtain an anti-counterfeit pressure-sensitive adhesive sheet which is difficult to be understood as being for anti-counterfeiting and difficult to counterfeit.

Hereinafter, embodiments of the present invention will be described.
[First Embodiment]
FIG. 1 is a cross-sectional view of an anti-counterfeit pressure-sensitive adhesive sheet according to the first embodiment of the present invention.
As shown in FIG. 1, the anti-counterfeit pressure-sensitive adhesive sheet 1 </ b> A according to the present embodiment is formed by laminating a base material 2 </ b> A, a pressure-sensitive adhesive layer 3 </ b> A, and a release material 4 </ b> A in that order. However, the release material 4A is peeled off when the pressure-sensitive adhesive sheet 1A is used (the same applies hereinafter).

  The base material 2A in the present embodiment constitutes an ultraviolet light passage control layer. That is, a through hole H is formed in the base material 2A, and portions other than the through hole H of the base material 2A shield ultraviolet rays.

  The hole diameter of the through hole H needs to be 300 μm or less, preferably 50 to 300 μm, and particularly preferably 100 to 200 μm. When the hole diameter of the through hole H is 300 μm or less, it is difficult to visually confirm the presence of the through hole H, and it is difficult to understand that the sheet is for forgery prevention. Moreover, such a fine through hole H is difficult to imitate. On the other hand, when the lower limit of the hole diameter of the through hole H is 50 μm or more, the ultraviolet coloring layer by the ultraviolet light that has passed through the through hole H can be sufficiently colored.

  The hole diameter of the through hole H may be constant in the thickness direction of the base material 2A or may change in the thickness direction of the base material 2A, but the hole diameter of the through hole H is the thickness of the base material 2A. When changing in the vertical direction, the hole diameter of the through hole H is preferably gradually reduced from the surface of the base material 2A on the pressure-sensitive adhesive layer 3A side to the surface of the base material 2A. Thus, when the hole diameter of the through-hole H changes, the through-hole H becomes less conspicuous on the surface of the anti-counterfeit pressure-sensitive adhesive sheet 1A.

  A plurality of through holes H are preferably formed in a predetermined arrangement. Thereby, the authenticity of the anti-counterfeit pressure-sensitive adhesive sheet 1A can be easily confirmed. What is necessary is just to set suitably the number of this through-hole H, arrangement | sequence, a hole density, etc. so that the ultraviolet-ray color development layer by ultraviolet irradiation may color with a desired dot pattern. For example, in addition to a lattice pattern or the like, characters such as a product name and a manufacturer name may appear depending on the dot coloring pattern.

  Such a through hole H is preferably formed by laser processing. According to laser processing, fine through-holes H that are difficult to imitate except by laser processing can be easily formed in a desired arrangement. The processing laser is a very expensive device, and its condition setting is difficult, and it is difficult to form the through hole H having the same shape. Therefore, the anti-counterfeit pressure-sensitive adhesive sheet 1A is difficult to be imitated. .

The type of laser used for laser processing is not particularly limited. For example, carbon dioxide (CO ₂ ) laser, TEA-CO ₂ laser, YAG laser, UV-YAG laser, excimer laser, semiconductor laser, YVO ₄ laser A YLF laser or the like can be used.

  The material of the substrate 2A is not particularly limited as long as the through hole H can be formed and can shield ultraviolet rays. However, because the base material 2A and the pressure-sensitive adhesive layer 3A are transparent, the anti-counterfeit pressure-sensitive adhesive sheet 1A is used for a sheet that covers, for example, a photo of a certificate such as a passport or a seal of a notification mark of a financial institution. can do.

  As the base material 2A, for example, a resin film containing an ultraviolet absorber, preferably a transparent resin film containing an ultraviolet absorber can be used.

  Examples of the resin film include polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyvinyl chloride, polystyrene, polyurethane, polycarbonate, polyamide, polyimide, polymethyl methacrylate, polybutene, polybutadiene, and polymethylpentene. , Ethylene vinyl acetate copolymer, ethylene (meth) acrylic acid copolymer, ethylene (meth) acrylic ester copolymer, ABS resin, ionomer resin; polyolefin, polyurethane, polystyrene, polyvinyl chloride, polyester, etc. The film which consists of resin, such as a thermoplastic elastomer to contain, those laminated films, etc. can be used.

  As the ultraviolet absorber, for example, an ultraviolet absorber such as benzophenone, benzotriazole, benzoate, benzoxazinone, triazine, phenyl salicylate, cyanoacrylate, or nickel complex can be used.

  The content of the ultraviolet absorber in the resin film is not particularly limited as long as it is an amount capable of shielding ultraviolet rays, but is usually preferably 0.1 to 5% by mass, particularly preferably 0.2 to 2.5%. It is preferable that it is mass%.

  A commercially available ultraviolet absorbing film can also be used as the resin film containing an ultraviolet absorber. Examples of the ultraviolet absorbing film include T-UV series manufactured by Tochisen, HB series manufactured by Teijin DuPont Films, and Q-37 series manufactured by Toray.

  The surface of the base material 2A (the surface of the anti-counterfeit pressure-sensitive adhesive sheet 1A) is preferably rough so that the through-holes H are more difficult to see, and when the base material 2A is transparent, the transparency It is preferable that the surface is rough enough to prevent damage. Specifically, the surface roughness (Rz) of the substrate 2A is preferably 3.0 μm or more, and particularly preferably 4.0 to 6.0 μm. The surface roughness (Rz: 10-point average roughness) conforms to JIS B0601.

  Thus, when the surface of 2 A of base materials is a rough surface, it is preferable that the minimum of the hole diameter of the through-hole H is 100 micrometers or more, especially 200 micrometers or more. Thereby, it is possible to sufficiently confirm the color of the ultraviolet color developing layer even through the substrate 2A having a rough surface.

  The thickness of the base material 2A is usually 1 to 500 μm, preferably about 3 to 300 μm, but can be appropriately changed according to the application of the anti-counterfeit pressure-sensitive adhesive sheet 1A.

  The pressure-sensitive adhesive layer 3A in the present embodiment constitutes an ultraviolet color forming layer that develops color when irradiated with ultraviolet rays. The pressure-sensitive adhesive layer 3A as the ultraviolet coloring layer can be formed of a pressure-sensitive adhesive to which a fluorescent agent is added. The type of the pressure-sensitive adhesive is not particularly limited, and may be any of acrylic, polyester, polyurethane, rubber, silicone, and the like. The pressure-sensitive adhesive may be any of an emulsion type, a solvent type, or a solventless type, and may be a crosslinked type or a non-crosslinked type.

  The fluorescent agent absorbs ultraviolet rays and emits light (fluorescence). Usually, the fluorescent agent is excited by ultraviolet rays and emits light by causing a fluorescent action (luminescence). The fluorescent agent may be a fluorescent dye or a fluorescent pigment. Examples of the fluorescent agent include, in addition to fluorite raw materials, derivatives such as diaminostilbene, quinazolone, perylene, coumarin, oxazolyl, triazole, carbazole, pyridine, naphthalic acid, imidazolone, fluorescein, mineral oil, thioflavine, eosin, rhodamine , Anthracene, terphenyl and the like.

  The content of the fluorescent agent in the pressure-sensitive adhesive is not particularly limited as long as it is an amount capable of visually recognizing dot-like color development by ultraviolet irradiation from the surface of the anti-counterfeit pressure-sensitive adhesive sheet 1A, but usually 0.1 to 5% by mass. It is preferable that the content is 0.2 to 2.5% by mass.

  The thickness of the pressure-sensitive adhesive layer 3A is usually 1 to 300 μm, preferably about 5 to 100 μm, but can be appropriately changed according to the application of the anti-counterfeit pressure-sensitive adhesive sheet 1A.

  The material of the release material 4A is not particularly limited, for example, a film made of a resin such as polyethylene terephthalate, polypropylene, polyethylene, or a foamed film thereof, paper such as glassine paper, coated paper, laminated paper, A silicone-based, fluorine-based, or long-chain alkyl group-containing carbamate or other release agent can be used.

  The thickness of the release material 4A is usually about 10 to 250 μm, preferably about 20 to 200 μm.

  In the anti-counterfeit pressure-sensitive adhesive sheet 1A, for example, (1) the through-hole H is formed in the substrate 2A, while the pressure-sensitive adhesive layer 3A is formed on the release treatment surface of the release material 4A, and the through-hole is formed in the pressure-sensitive adhesive layer 3A. A method of laminating the base material 2A on which H has been formed, or (2) after forming the pressure-sensitive adhesive layer 3A on the release treatment surface of the release material 4A and laminating the base material 2A on the pressure-sensitive adhesive layer 3A, It can manufacture by the method of forming the through-hole H in this. The method (1) is preferable in that there is no risk of forming a hole in the pressure-sensitive adhesive layer 3A by mistake.

  As described above, the through hole H is preferably formed by laser processing. The through hole H formed by laser processing may have a tapered taper. In the case of the method (1), the base material is formed such that the smaller the diameter of the through hole H is on the surface side of the base material 2A. 2A is preferably laminated on the pressure-sensitive adhesive layer 3A.

  In order to form the pressure-sensitive adhesive layer 3A on the release material 4A, a coating agent containing a pressure-sensitive adhesive and a fluorescent agent constituting the pressure-sensitive adhesive layer 3A and optionally a solvent is prepared, and a roll coater, knife coater, roll What is necessary is just to apply | coat and dry to the peeling process surface of 4 A of peeling materials with coating machines, such as a knife coater, an air knife coater, a die coater, a bar coater, a gravure coater, a curtain coater.

  In order to use the anti-counterfeit pressure-sensitive adhesive sheet 1A described above, the release material 4A is peeled from the pressure-sensitive adhesive layer 3A, and the exposed adhesive surface of the pressure-sensitive adhesive layer 3A is an adherend that is subject to anti-counterfeiting, for example, Affixed to documents, photos, printed materials, seals, paintings, drawings, etc. used for passports, stamps, seal certificates and other certificates.

  In order to confirm the authenticity of the adherend (anti-counterfeit pressure-sensitive adhesive sheet 1A), the anti-counterfeit pressure-sensitive adhesive sheet 1A may be irradiated with ultraviolet rays. At this time, if the anti-counterfeit pressure-sensitive adhesive sheet 1A is genuine, the ultraviolet light passes through the through hole H of the base material 2A which is an ultraviolet light passage control layer and reaches the pressure-sensitive adhesive layer 3A which is an ultraviolet color developing layer, and the pressure-sensitive adhesive layer 3A. Are fine dots corresponding to the through-holes H, and color develops in a predetermined pattern. If color is seen in such a fine dot pattern, it is confirmed that the anti-counterfeit pressure-sensitive adhesive sheet 1A and the adherend are genuine.

  The wavelength of the ultraviolet rays to be irradiated may be appropriately selected so that a fine dot coloring pattern can be seen according to the materials of the ultraviolet coloring layer and the ultraviolet passage control layer.

  Since the through hole H is fine and difficult to visually confirm, the anti-counterfeit pressure-sensitive adhesive sheet 1 </ b> A looks like a cover sheet without any change. Therefore, it is difficult to notice that the anti-counterfeit pressure-sensitive adhesive sheet 1A is for anti-counterfeit. Moreover, the through hole H is fine, and it is very difficult to form a fine dot color development pattern corresponding to the through hole H by printing.

[Second Embodiment]
FIG. 2 is a cross-sectional view of an anti-counterfeit pressure-sensitive adhesive sheet according to the second embodiment of the present invention.
As shown in FIG. 2, the anti-counterfeit pressure-sensitive adhesive sheet 1 </ b> B according to the present embodiment has a pressure-sensitive adhesive layer 3 </ b> B and a release material 4 </ b> B laminated in this order on one surface of the base material 2 </ b> B, and the other side of the base material 2 </ b> B. The surface coat layer 5B is laminated on this surface.

  The pressure-sensitive adhesive layer 3B and the release material 4B are the same as the pressure-sensitive adhesive layer 3A and the release material 4A in the first embodiment, and also in this embodiment, the pressure-sensitive adhesive layer 3B constitutes an ultraviolet coloring layer. On the other hand, in the present embodiment, the surface coat layer 5B constitutes an ultraviolet ray passage control layer.

  A through hole H is formed in the surface coat layer 5B, and portions other than the through hole H of the surface coat layer 5B shield ultraviolet rays. The diameter, number, arrangement, hole density, and the like of the through holes H and the formation method are the same as those of the through holes H in the first embodiment.

  The surface coat layer 5B in the present embodiment is a layer containing an ultraviolet absorber, and may be composed only of the ultraviolet absorber, or may be formed by dispersing the ultraviolet absorber in a desired film forming material. Good. In addition, various additives may be blended in the surface coat layer 5B for purposes other than ultraviolet absorption.

  As the ultraviolet absorber, those exemplified in the first embodiment can be used. Examples of the film forming material include thermosetting or energy ray curable resins such as polyester, polyurethane, and acrylic acid copolymer. Examples of the additive include a hard coat agent, an antifouling agent, and an antistatic agent.

  The thickness of the surface coat layer 5B is usually about 1 to 30 μm, preferably about 3 to 20 μm, but can be appropriately changed according to the purpose of the surface coat layer 5B.

  The base material 2B in the present embodiment is a normal base material, and therefore, a resin film in which the through hole H is not formed and does not contain an ultraviolet absorber can be used for the base material 2B. As a resin film, the thing similar to the resin film (it does not contain a ultraviolet absorber) which comprises 2 A of base materials in 1st Embodiment can be used.

  Here, the distance (in this embodiment, the thickness of the base material 2B) between the pressure-sensitive adhesive layer 3B, which is an ultraviolet coloring layer, and the surface coat layer 5B, which is an ultraviolet light passage control layer, is 500 μm or less. Particularly preferably, it is preferably 200 μm or less. By setting the distance between the two layers within the above range, the ultraviolet ray that has passed through the through hole H reaches the ultraviolet ray coloring layer without diffusing in the middle, so that the ultraviolet ray coloring layer is colored with fine dots. Can be recognized visually.

  The anti-counterfeit pressure-sensitive adhesive sheet 1B has, for example, (1) a surface coat layer 5B formed on a base material 2B, and through-holes H are formed in the surface coat layer 5B. Layer 3B is formed, and the base material 2B on which the surface coat layer 5B is formed is laminated on the pressure-sensitive adhesive layer 3B, or (2) the pressure-sensitive adhesive layer 3B is formed on the release treatment surface of the release material 4B. After the base material 2B is laminated on the pressure-sensitive adhesive layer 3B and the surface coat layer 5B is further formed on the base material 2B, it can be manufactured by a method of forming a through hole H in the surface coat layer 5B. Method (1) is preferable in that there is no risk of forming a hole in the pressure-sensitive adhesive layer 3B by mistake.

  In order to form the surface coat layer 5B on the substrate 2B, a coating agent containing a component (containing at least an ultraviolet absorber) constituting the surface coat layer 5B and optionally a solvent is prepared, and a roll coater, What is necessary is just to apply | coat and dry on the surface of the base material 2B with coating machines, such as a knife coater, a roll knife coater, an air knife coater, a die coater, a bar coater, a gravure coater, a curtain coater.

  The through hole H is preferably formed by laser processing as in the first embodiment. In addition, in this embodiment, although the through-hole H penetrates the surface coat layer 5B, it may reach the middle of the base material 2B or may penetrate the base material 2B.

  The anti-counterfeit pressure-sensitive adhesive sheet 1B according to this embodiment can be used in the same manner as the anti-counterfeit pressure-sensitive adhesive sheet 1A according to the first embodiment. When this anti-counterfeit pressure-sensitive adhesive sheet 1B is irradiated with ultraviolet rays, the ultraviolet rays pass through the through-holes H of the surface coat layer 5B, which is an ultraviolet light passage control layer, and reach the pressure-sensitive adhesive layer 3B, which is an ultraviolet-color developing layer, through the substrate 2B. Thus, the pressure-sensitive adhesive layer 3B is colored with fine dots corresponding to the through holes H and in a predetermined pattern. If color is seen in such a fine dot pattern, it is confirmed that the anti-counterfeit pressure-sensitive adhesive sheet 1B and the adherend are genuine.

[Third Embodiment]
FIG. 3 is a cross-sectional view of an anti-counterfeit pressure-sensitive adhesive sheet according to the third embodiment of the present invention.
As shown in FIG. 3, the anti-counterfeit pressure-sensitive adhesive sheet 1 </ b> C according to this embodiment has a pressure-sensitive adhesive layer 3 </ b> C and a release material 4 </ b> C laminated in this order on one surface of the base material 2 </ b> C, and the other side of the base material 2 </ b> C. The second pressure-sensitive adhesive layer 7C and the semi-transparent layer 6C are laminated in this order on the surface.

  The pressure-sensitive adhesive layer 3C and the release material 4C are the same as the pressure-sensitive adhesive layer 3A and the release material 4A in the first embodiment, and also in this embodiment, the pressure-sensitive adhesive layer 3C constitutes an ultraviolet coloring layer. Further, the base material 2C is the same as the base material 2B in the second embodiment. On the other hand, in the present embodiment, the second pressure-sensitive adhesive layer 7C constitutes an ultraviolet ray passage control layer.

  Through holes H are formed in the semitransparent layer 6C and the second pressure-sensitive adhesive layer 7C, and portions other than the through-holes H of the second pressure-sensitive adhesive layer 7C shield ultraviolet rays. The diameter, number, arrangement, hole density, and the like of the through holes H and the formation method are the same as those of the through holes H in the first embodiment.

  The second pressure-sensitive adhesive layer 7C can be formed of a pressure-sensitive adhesive to which an ultraviolet absorber is added. The kind of adhesive is not specifically limited, The thing similar to the adhesive of 3 A of adhesive layers in 1st Embodiment can be illustrated. Moreover, as an ultraviolet absorber, what was illustrated in 1st Embodiment can be used, and the addition amount is the same as that of the content in 2 A of base materials of 1st Embodiment.

  The thickness of the second pressure-sensitive adhesive layer 7C is usually 1 to 300 μm, preferably about 5 to 100 μm.

  The semi-transparent layer 6C is a layer that is semi-transparent so that the through-hole H is more difficult to see, and is constituted by, for example, a resin film having a rough surface or a resin film in which fine particles are mixed. Can do.

  The resin film having a rough surface preferably has a surface roughness (Rz) of 3.0 μm or more, particularly 4.0 to 6.0 μm. The kind (material) of the resin film can be exemplified by the same material as the base material 2A in the first embodiment.

  The thickness of the semitransparent layer 6C is usually about 1 to 500 μm, preferably about 3 to 300 μm.

  The anti-counterfeit pressure-sensitive adhesive sheet 1C has, for example, (1) the second pressure-sensitive adhesive layer 7C laminated on the back surface of the semi-transparent layer 6C (the opposite surface when the surface of the semi-transparent layer 6C is rough). The laminated body is prepared, and the through-hole H penetrating the translucent layer 6C and the second pressure-sensitive adhesive layer 7C is formed, while the pressure-sensitive adhesive layer 3C is formed on the release treatment surface of the release material 4C, and the pressure-sensitive adhesive layer A method of laminating the base material 2C on 3C and further applying the second pressure-sensitive adhesive layer 7C on the base material 2C, or (2) the back surface of the semitransparent layer 6C (the surface of the semitransparent layer 6C becomes rough) If the adhesive layer 3C is formed on the release treatment surface of the release material 4C, the laminate having the second adhesive layer 7C laminated on the opposite surface) is formed. After laminating the material 2C and further pasting the second pressure-sensitive adhesive layer 7C on the base material 2C, the translucent layer 6C and It can be prepared by methods such as forming a through-hole H penetrating the second adhesive layer 7C. Method (1) is preferred in that there is no risk of forming holes in the pressure-sensitive adhesive layer 3C by mistake.

  In order to laminate the second pressure-sensitive adhesive layer 7C on the back surface of the semitransparent layer 6C, a coating agent containing the pressure-sensitive adhesive and the ultraviolet absorber constituting the second pressure-sensitive adhesive layer 7C and, if desired, a solvent is prepared. Then, it is applied to the back surface of the semi-transparent layer 6C with a coating machine such as a roll coater, knife coater, roll knife coater, air knife coater, die coater, bar coater, gravure coater, curtain coater, etc. and dried, or the release material is peeled off. After apply | coating to a process surface and making it dry, what is necessary is just to stick together on the back surface of the semi-transparent layer 6C.

  The through hole H is preferably formed by laser processing as in the first embodiment. In the present embodiment, the through hole H penetrates the semi-transparent layer 6C and the second pressure-sensitive adhesive layer 7C, but it may reach the middle of the base material 2C or may penetrate the base material 2C.

  The anti-counterfeit pressure-sensitive adhesive sheet 1C according to this embodiment can be used in the same manner as the anti-counterfeit pressure-sensitive adhesive sheet 1A according to the first embodiment. When this forgery-preventing pressure-sensitive adhesive sheet 1C is irradiated with ultraviolet rays, the ultraviolet rays pass through the through-holes H of the semitransparent layer 6C and the second pressure-sensitive adhesive layer 7C (ultraviolet passage control layer) and pass through the substrate 2C. The pressure-sensitive adhesive layer 3C is reached, and the pressure-sensitive adhesive layer 3C is colored with fine dots corresponding to the through holes H and in a predetermined pattern. If color development is observed with such a fine dot pattern, it is confirmed that the anti-counterfeit pressure-sensitive adhesive sheet 1C and the adherend are genuine.

  In the anti-counterfeit pressure-sensitive adhesive sheet 1C according to this embodiment, a base material (transparent resin film; second base material) similar to the base material 2C may be used instead of the translucent layer 6C. (This is referred to as “anti-counterfeit pressure-sensitive adhesive sheet 1C ′”). When the second base material is provided in this way, the surface of the base material 2C can be protected from rubbing, chemicals, etc. when there is printing or the like on the surface of the base material 2C (hereinafter referred to as the second base material). The same applies to the anti-counterfeit pressure-sensitive adhesive sheet provided with a base material).

  However, in the above case, the through hole H is preferably formed only in the second pressure-sensitive adhesive layer 7C. Thus, when the through-hole H does not exist on the surface of the anti-counterfeit pressure-sensitive adhesive sheet 1C ′, the through-hole H becomes more difficult to see, and it is more noticeable that the anti-counterfeit pressure-sensitive adhesive sheet 1C ′ is for anti-counterfeit. (It will be the same in the anti-counterfeit pressure-sensitive adhesive sheet having no through-holes on the surface).

[Fourth Embodiment]
FIG. 4 is a cross-sectional view of an anti-counterfeit pressure-sensitive adhesive sheet according to the fourth embodiment of the present invention.
As shown in FIG. 4, the anti-counterfeit pressure-sensitive adhesive sheet 1 </ b> D according to the present embodiment has a pressure-sensitive adhesive layer 3 </ b> D and a release material 4 </ b> D laminated in that order on one surface of the base material 2 </ b> D, and the other side of the base material 2 </ b> D. The second pressure-sensitive adhesive layer 7D and the second base material 8D are laminated in this order on the surface.

  The pressure-sensitive adhesive layer 3D and the release material 4D are the same as the pressure-sensitive adhesive layer 3A and the release material 4A in the first embodiment, and also in this embodiment, the pressure-sensitive adhesive layer 3D constitutes an ultraviolet coloring layer. Further, the base material 2D is the same as the base material 2B in the second embodiment, and the second pressure-sensitive adhesive layer 7D does not contain an ultraviolet absorber, and the second pressure-sensitive adhesive layer in the third embodiment. The same as 7C. Furthermore, the second base material 8D is the same as the base material 2A in the first embodiment, and in this embodiment, the second base material 8D constitutes an ultraviolet ray passage control layer.

  The anti-counterfeit pressure-sensitive adhesive sheet 1D has, for example, (1) a through hole H is formed in the second base material 8D, and the second pressure-sensitive adhesive layer 7D is laminated on one surface thereof, or the second base material 8D and the second base material 8D A laminate with two pressure-sensitive adhesive layers 7D is prepared, and through holes H are formed in the second base material 8D, while a pressure-sensitive adhesive layer 3D is formed on the release treatment surface of the release material 4D, and the pressure-sensitive adhesive layer 3D. A method of laminating the base material 2D on the base material 2D and further attaching the second pressure-sensitive adhesive layer 7D on the base material 2D, or (2) a laminate of the second base material 8D and the second pressure-sensitive adhesive layer 7D. On the other hand, the pressure-sensitive adhesive layer 3D is formed on the release-treated surface of the release material 4D, the base material 2D is laminated on the pressure-sensitive adhesive layer 3D, and the second pressure-sensitive adhesive layer 7D is pasted on the base material 2D. Then, it can manufacture by the method of forming the through-hole H which penetrates 2nd base material 8D.

  The through hole H is preferably formed by laser processing as in the first embodiment. In the present embodiment, the through hole H penetrates the second base material 8D, but it may reach the middle of the second pressure-sensitive adhesive layer 7D or the base material 2D, or the second pressure-sensitive adhesive layer 7D or the like. You may penetrate the base material 2D.

  The anti-counterfeit pressure-sensitive adhesive sheet 1D according to this embodiment can be used in the same manner as the anti-counterfeit pressure-sensitive adhesive sheet 1A according to the first embodiment. When this anti-counterfeit pressure-sensitive adhesive sheet 1D is irradiated with ultraviolet rays, the ultraviolet rays pass through the through holes H of the second base material 8D, which is an ultraviolet light passage control layer, and pass through the second pressure-sensitive adhesive layer 7D and the base material 2D. The pressure-sensitive adhesive layer 3D, which is a color-developing layer, is reached, and the pressure-sensitive adhesive layer 3D is colored with fine dots corresponding to the through holes H and in a predetermined pattern. If color development is seen with such a fine dot pattern, it is confirmed that the anti-counterfeit pressure-sensitive adhesive sheet 1D and the adherend are genuine.

[Fifth Embodiment]
FIG. 5 is a cross-sectional view of an anti-counterfeit pressure-sensitive adhesive sheet according to the fifth embodiment of the present invention.
As shown in FIG. 5, the anti-counterfeit pressure-sensitive adhesive sheet 1 </ b> E according to the present embodiment has a pressure-sensitive adhesive layer 3 </ b> E and a release material 4 </ b> E laminated in that order on one surface of the base material 2 </ b> E, and the other side of the base material 2 </ b> E. The second pressure-sensitive adhesive layer 7E, the second base material 8E, and the surface coat layer 5E are laminated in this order on the surface.

  The pressure-sensitive adhesive layer 3E and the release material 4E are the same as the pressure-sensitive adhesive layer 3A and the release material 4A in the first embodiment. In this embodiment, the pressure-sensitive adhesive layer 3E also constitutes an ultraviolet coloring layer. The base material 2E and the second base material 8E are both the same as the base material 2B in the second embodiment, and the second pressure-sensitive adhesive layer 7E is the second pressure-sensitive adhesive in the fourth embodiment. Similar to layer 7D. Furthermore, the surface coat layer 5E is the same as the surface coat layer 5B in the second embodiment, and in this embodiment, the surface coat layer 5E constitutes an ultraviolet ray passage control layer.

  A through-hole H is formed in the surface coat layer 5E, and portions other than the through-hole H of the surface coat layer 5E shield ultraviolet rays. The diameter, number, arrangement, hole density, and the like of the through holes H and the formation method are the same as those of the through holes H in the first embodiment.

  The anti-counterfeit pressure-sensitive adhesive sheet 1E has, for example, (1) a laminate in which the second pressure-sensitive adhesive layer 7E is laminated on one surface of the second substrate 8E and the surface coat layer 5E is laminated on the other surface, While the through-hole H is formed in the surface coat layer 5E, the pressure-sensitive adhesive layer 3E is formed on the release treatment surface of the release material 4E, and the base material 2E is laminated on the pressure-sensitive adhesive layer 3E. (2) While producing the laminated body which laminated | stacked the 2nd adhesive layer 7E on one side of the 2nd base material 8E, and the surface coat layer 5E on the other side After forming the pressure-sensitive adhesive layer 3E on the release treatment surface of the release material 4E, laminating the base material 2E on the pressure-sensitive adhesive layer 3E, and further sticking the second pressure-sensitive adhesive layer 7E on the base material 2E, A method of forming a through hole H penetrating the coat layer 5E, or (3) a second substrate 8E and a second pressure-sensitive adhesive layer 7 On the other hand, the pressure-sensitive adhesive layer 3E is formed on the release treatment surface of the release material 4E, the base material 2E is laminated on the pressure-sensitive adhesive layer 3E, and the second pressure-sensitive adhesive is further formed on the base material 2E. After the layer 7E is pasted, the surface coating layer 5E can be formed on the surface of the second substrate 8E, and the through hole H can be formed in the surface coating layer 5E.

  The through hole H is preferably formed by laser processing as in the first embodiment. In the present embodiment, the through hole H penetrates the surface coat layer 5E, but it may reach the middle of the second base material 8E, the second adhesive layer 7E, or the base material 2E, or the second base material 8E. You may penetrate the base material 8E, the second pressure-sensitive adhesive layer 7E, or the base material 2E.

  The anti-counterfeit pressure-sensitive adhesive sheet 1E according to this embodiment can be used in the same manner as the anti-counterfeit pressure-sensitive adhesive sheet 1A according to the first embodiment. When this anti-counterfeit pressure-sensitive adhesive sheet 1E is irradiated with ultraviolet rays, the ultraviolet rays pass through the through-holes H of the surface coat layer 5E which is an ultraviolet ray passage control layer, and the second base material 8E, the second pressure-sensitive adhesive layer 7E and the base material The pressure-sensitive adhesive layer 3E, which is an ultraviolet color developing layer, is reached through 2E, and the pressure-sensitive adhesive layer 3E develops color with fine dots corresponding to the through holes H and in a predetermined pattern. If color development is seen in such a fine dot pattern, it is confirmed that the anti-counterfeit pressure-sensitive adhesive sheet 1E and the adherend are genuine.

  Here, in the anti-counterfeit pressure-sensitive adhesive sheets 1B to 1E (including the anti-counterfeit pressure-sensitive adhesive sheet 1C ′) according to the second to fifth embodiments, the pressure-sensitive adhesive layers 3B to 3E constitute an ultraviolet color forming layer. However, instead of the pressure-sensitive adhesive layers 3B to 3E, the base materials 2B to 2E may constitute an ultraviolet coloring layer. In this case, the pressure-sensitive adhesive layers 3B to 3E can be formed in the same manner as the second pressure-sensitive adhesive layer 7D in the fourth embodiment.

  As a base material constituting the ultraviolet coloring layer, for example, a resin film containing a fluorescent agent, preferably a transparent resin film containing a fluorescent agent can be used. As a kind of fluorescent agent and a kind of resin of a resin film, what was mentioned in 1st Embodiment can be illustrated.

  When such an anti-counterfeit pressure-sensitive adhesive sheet is irradiated with ultraviolet rays, the ultraviolet rays reach the base material which is the ultraviolet color developing layer through the ultraviolet light passage control layer, and the base material is a fine dot corresponding to the through hole H, The color develops with this pattern.

[Sixth Embodiment]
FIG. 6 is a cross-sectional view of an anti-counterfeit pressure-sensitive adhesive sheet according to the sixth embodiment of the present invention.
As shown in FIG. 6, the anti-counterfeit pressure-sensitive adhesive sheet 1F according to the present embodiment has a pressure-sensitive adhesive layer 3F and a release material 4F laminated in this order on one surface of the base material 2F, and the other side of the base material 2F. The second pressure-sensitive adhesive layer 7F and the second base material 8F are laminated in this order on the surface.

  The anti-counterfeit pressure-sensitive adhesive sheet 1F is formed by applying the second base material 8F to the surface of the anti-counterfeit pressure-sensitive adhesive sheet 1A according to the first embodiment (the surface of the base material 2A) via the second pressure-sensitive adhesive layer 7F. It is laminated and has the same configuration as the anti-counterfeit pressure-sensitive adhesive sheet 1A according to the first embodiment except for the second pressure-sensitive adhesive layer 7F and the second base material 8F. That is, also in the present embodiment, the pressure-sensitive adhesive layer 3F constitutes an ultraviolet color forming layer, and the substrate 2F constitutes an ultraviolet ray passage control layer.

  The second pressure-sensitive adhesive layer 7F is the same as the second pressure-sensitive adhesive layer 7D in the fourth embodiment, and the second base material 8F is the same as the base material 2B in the second embodiment. By sticking the second base material 8F to the base material 2F via the second pressure-sensitive adhesive layer 7F, the through holes H formed in the base material 2F are more difficult to see.

  The anti-counterfeit pressure-sensitive adhesive sheet 1F, for example, manufactures a laminate (pre-counterfeit prevention pressure-sensitive adhesive sheet) similar to the anti-counterfeit pressure-sensitive adhesive sheet 1A according to the first embodiment, while the second base material 8F and the first A laminate with the second pressure-sensitive adhesive layer 7F can be produced and manufactured by a method of sticking the second pressure-sensitive adhesive layer 7F on the surface of the pre-counterfeiting pressure-sensitive adhesive sheet (surface of the base material 2F). .

  The anti-counterfeit adhesive sheet 1F according to the present embodiment can be used in the same manner as the anti-counterfeit adhesive sheet 1A according to the first embodiment. When this anti-counterfeit pressure-sensitive adhesive sheet 1F is irradiated with ultraviolet rays, the ultraviolet rays pass through the through holes H of the base material 2F which is an ultraviolet light passage control layer via the second base material 8F and the second pressure-sensitive adhesive layer 7F. The pressure-sensitive adhesive layer 3F, which is an ultraviolet coloring layer, reaches the pressure-sensitive adhesive layer 3F, and the color of the pressure-sensitive adhesive layer 3F is developed with fine dots corresponding to the through holes H and in a predetermined pattern. If color is seen in such a fine dot pattern, it is confirmed that the anti-counterfeit pressure-sensitive adhesive sheet 1F and the adherend are genuine.

[Seventh Embodiment]
FIG. 7 is a cross-sectional view of an anti-counterfeit pressure-sensitive adhesive sheet according to the seventh embodiment of the present invention.
As shown in FIG. 7, the anti-counterfeit pressure-sensitive adhesive sheet 1G according to the present embodiment has a pressure-sensitive adhesive layer 3G and a release material 4G laminated on one surface of a base material 2G in that order, and the other side of the base material 2G. The second pressure-sensitive adhesive layer 7G and the second base material 8G are laminated on the surface in that order.

  The release material 4G is the same as the release material 4A in the first embodiment, and the pressure-sensitive adhesive layer 3G is the same as the pressure-sensitive adhesive layer 3A in the first embodiment except that it does not contain a fluorescent agent. These are the same as the base material 2A in the first embodiment. That is, in this embodiment, the base material 2G constitutes an ultraviolet ray passage control layer.

  The second pressure-sensitive adhesive layer 7G is the same as the pressure-sensitive adhesive layer 3A in the first embodiment. That is, in the present embodiment, the second pressure-sensitive adhesive layer 7G constitutes an ultraviolet color developing layer. The second substrate 8G is the same as the substrate 2B in the second embodiment.

  The anti-counterfeit pressure-sensitive adhesive sheet 1G has, for example, (1) a laminate of a second base material 8G and a second pressure-sensitive adhesive layer 7G, and a through-hole H formed in the base material 2G. A pressure-sensitive adhesive layer 3G is formed on the 4G peeling surface, the base material 2G having through holes H formed thereon is laminated on the pressure-sensitive adhesive layer 3G, and the second pressure-sensitive adhesive layer 7G is further formed on the base material 2G. Or (2) A laminate of the second substrate 8G and the second adhesive layer 7G is produced, while the adhesive layer 3G is formed on the release treatment surface of the release material 4G, and the adhesive Manufactured by laminating the base material 2G on the adhesive layer 3G, forming a through hole H in the base material 2G, and further attaching the second adhesive layer 7G on the base material 2G on which the through hole H is formed. can do.

  The anti-counterfeit pressure-sensitive adhesive sheet 1G according to this embodiment can be used in the same manner as the anti-counterfeit pressure-sensitive adhesive sheet 1A according to the first embodiment. When this forgery-preventing pressure-sensitive adhesive sheet 1G is irradiated with ultraviolet rays, the ultraviolet rays pass through the second base material 8G and the second pressure-sensitive adhesive layer 7G, which is an ultraviolet color developing layer, and further penetrate through the base material 2G, which is an ultraviolet light passage control layer. Pass through hole H. At this time, the second pressure-sensitive adhesive layer 7G, which is an ultraviolet color developing layer, develops overall color by irradiation with ultraviolet rays, but the portion corresponding to the through hole H of the substrate 2G is a fine dot and has a predetermined pattern. The color develops more strongly. The reason for this is not necessarily clear, but the portion other than the through-hole H absorbs light, and the reflected light is less than the portion of the through-hole H, so that the luminance of the through-hole H becomes higher. It is believed that there is. If strong color development is seen in the fine dot pattern as described above, it is confirmed that the anti-counterfeit pressure-sensitive adhesive sheet 1G and the adherend are genuine.

  In the anti-counterfeit pressure-sensitive adhesive sheet 1G, the second pressure-sensitive adhesive layer 7G constitutes an ultraviolet color developing layer. Instead of the second pressure-sensitive adhesive layer 7G, the second base material 8G is colored with ultraviolet light. You may make it comprise a layer. In this case, a resin film containing a fluorescent agent can be used as the second base material 8G.

  The embodiment described above is described for facilitating understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

  For example, the anti-counterfeit pressure-sensitive adhesive sheets 1A to 1G according to the above embodiment are provided with the release materials 4A to 4G, but the present invention is not limited to this, and the release materials 4A to 4G may be omitted. Good.

  Further, in the anti-counterfeit pressure-sensitive adhesive sheets 1A to 4G, another anti-tampering function (once the anti-counterfeit pressure-sensitive adhesive sheet is once peeled off) is applied to the base material, the pressure-sensitive adhesive layer, or a layer provided between them. A function that makes it possible or clear that it has been removed may be provided. For example, an anti-tampering function can be imparted by forming a base material or a pressure-sensitive adhesive layer with a brittle material or by subjecting a separately provided layer to partial (for example, character type) peeling treatment. .

  EXAMPLES Hereinafter, although an Example etc. demonstrate this invention further more concretely, the scope of the present invention is not limited to these Examples etc.

[Example 1]
A polyethylene terephthalate film (made by Toray Industries, Lumirror 38 Q-37, containing an ultraviolet absorber, thickness: 38 μm, surface roughness (Rz): 0.4 μm) as a base material was irradiated with CO ₂ laser light. (Used by Sumitomo Heavy Industries, Ltd., SLR-210T), a plurality of through-holes penetrating the base material were formed in a lattice shape with a vertical and horizontal pitch of 2 mm, and this was used as an ultraviolet ray passage control layer. The hole diameter of the through hole was 110 μm.

  On the other hand, 100 parts by mass of an acrylic solvent-based pressure-sensitive adhesive (manufactured by Lintec Corporation, PAT1) and 0.5 part by mass of a fluorescent agent (manufactured by Nippon Fluorescent Chemical Co., Ltd., Tokushu Koutai O-AN) It was applied to the release-treated surface of the release-treated release material (manufactured by Lintec, 8LK Ao, thickness: 90 μm) with a knife coater so that the thickness after drying was 20 μm, and dried at 90 ° C. for 1 minute. .

  The base material as the ultraviolet light passage control layer was pressure-bonded to the pressure-sensitive adhesive layer as the ultraviolet color forming layer thus formed, to obtain a forgery prevention pressure-sensitive adhesive sheet (see FIG. 1).

[Example 2]
A polyethylene terephthalate film as a base material (manufactured by Toray Industries, Lumirror 50T-60, thickness: 50 μm, surface roughness (Rz): 0.4 μm) on one side, an ultraviolet absorber (on the other hand, manufactured by Yushi Kogyo Co., Ltd., ULS- A coating agent obtained by diluting 1933D) with ethyl acetate was applied by a bar coater so that the thickness after drying was 3 μm, and dried at 80 ° C. for 1 minute.

The surface coat layer thus formed (surface roughness (Rz): 2.0 μm) is irradiated with CO ₂ laser light in the same manner as in Example 1 to form a plurality of through-holes. Was used as an ultraviolet ray passage control layer. The hole diameter of the through hole was 110 μm.

  On the other hand, a laminate of a release material and a pressure-sensitive adhesive layer (ultraviolet color-developing layer) was prepared in the same manner as in Example 1, and the base material on which the ultraviolet light passage control layer was formed was pressure bonded to the pressure-sensitive adhesive layer. A pressure-sensitive adhesive sheet for prevention was obtained (see FIG. 2).

Example 3
In the same manner as in Example 1, a laminate of the release material and the pressure-sensitive adhesive layer (ultraviolet color developing layer; first pressure-sensitive adhesive layer) was prepared, and a polyethylene terephthalate film (first base material) was formed on the pressure-sensitive adhesive layer. Toray Industries, Inc., Lumirror 50T-60, thickness: 50 μm) was pressure-bonded.

  On the other hand, 100 parts by mass of an acrylic solvent-based pressure-sensitive adhesive (manufactured by Lintec Corporation, PAT1) and 2.0 parts by mass of an ultraviolet absorber (Shiraishi Calcium Co., Ltd., Siasorb UV-24) were mixed and peeled on one side. The release treatment surface of the release material (manufactured by Lintec, 8LK Ao, thickness 90 μm) was applied with a knife coater so that the thickness after drying was 20 μm, and dried at 90 ° C. for 1 minute.

  In the second pressure-sensitive adhesive layer thus formed, a semi-transparent layer of polyethylene terephthalate film (manufactured by Panac Industry Co., Ltd., PET S mat 38, thickness: 38 μm, surface roughness (Rz): 5.0 μm) The back surface (the opposite surface of the rough surface) was pressure bonded.

A plurality of through-holes are formed by irradiating the laminated body from the translucent layer side of the obtained laminated body with CO ₂ laser light in the same manner as in Example 1, and the second pressure-sensitive adhesive layer is used as an ultraviolet light passage control layer. It was. The diameter of the through hole was 200 μm.

  The release material was peeled from the laminate, and the exposed second pressure-sensitive adhesive layer (ultraviolet ray passage control layer) was pressure-bonded to the base material to obtain an anti-counterfeit pressure-sensitive adhesive sheet (see FIG. 3).

Example 4
In the same manner as in Example 1, a laminate of the release material and the pressure-sensitive adhesive layer (ultraviolet color developing layer; first pressure-sensitive adhesive layer) was prepared, and a polyethylene terephthalate film (first base material) was formed on the pressure-sensitive adhesive layer. Toray Industries, Inc., Lumirror 50T-60, thickness: 50 μm) was pressure-bonded.

  On the other hand, an acrylic solvent-type adhesive (Lintec Corp., PAT1) is applied to the exfoliated surface of a release material (Lintec Corp., 8LK Ao, thickness 90 μm) on one side, and the thickness after drying is 20 μm. Then, it was applied with a knife coater and dried at 90 ° C. for 1 minute.

  On the second pressure-sensitive adhesive layer thus formed, a polyethylene terephthalate film (Toray Co., Ltd., Lumirror 38 Q-37, containing UV absorber, thickness: 38 μm, surface roughness (Rz ): 0.4 μm).

The obtained the laminated body from the second substrate side of the laminate, Example 1 was irradiated with CO ₂ laser beam through holes and a plurality formed in the same manner as ultraviolet passage control the second base member Layered. The hole diameter of the through hole was 110 μm.

  The release material was peeled from the laminate, and the exposed second pressure-sensitive adhesive layer was pressure-bonded to the first base material to obtain a forgery-preventing pressure-sensitive adhesive sheet (see FIG. 4).

Example 5
A laminate of the release material and the pressure-sensitive adhesive layer (ultraviolet color-developing layer) was prepared in the same manner as in Example 1, and a polyethylene terephthalate film (Lumirror 50T, manufactured by Toray Industries, Inc.) was used as the first base material on the pressure-sensitive adhesive layer. 60, thickness: 50 μm).

  On the other hand, an acrylic solvent-type adhesive (Lintec Corp., PAT1) is applied to the exfoliated surface of a release material (Lintec Corp., 8LK Ao, thickness 90 μm) on one side, and the thickness after drying is 20 μm. Then, it was applied with a knife coater and dried at 90 ° C. for 1 minute.

  A polyethylene terephthalate film as a second base material (manufactured by Toray Industries, Lumirror 50T-60, thickness: 50 μm, surface roughness (Rz): 0.4 μm) is formed on the second pressure-sensitive adhesive layer thus formed. Was crimped.

  Then, on the surface of the second base material, a coating agent obtained by diluting an ultraviolet absorber (manufactured by Yushi Kogyo Co., Ltd., ULS-1933D) with ethyl acetate is applied so that the thickness after drying becomes 3 μm. And dried at 80 ° C. for 1 minute.

The surface coat layer thus formed (surface roughness (Rz): 2.0 μm) is irradiated with CO ₂ laser light in the same manner as in Example 1 to form a plurality of through-holes. Was used as an ultraviolet ray passage control layer. The hole diameter of the through hole was 110 μm.

  The release material was peeled from the laminate, and the exposed second pressure-sensitive adhesive layer was pressure-bonded to the first base material to obtain an anti-counterfeit pressure-sensitive adhesive sheet (see FIG. 5).

Example 6
In the same manner as in Example 1, a forgery-preventing pressure-sensitive adhesive sheet (pre-counterfeit-proof pressure-sensitive adhesive sheet) was produced. On the other hand, on one side of a polyethylene terephthalate film (Toray Industries, Lumirror 50T-60, thickness: 50 μm, surface roughness (Rz): 0.4 μm) as a second substrate, an acrylic solvent-type adhesive (Lintec) PAT1) manufactured by the company was applied with a knife coater so that the thickness after drying was 20 μm, and dried at 90 ° C. for 1 minute.

  The thus formed second pressure-sensitive adhesive layer was pressure-bonded to the base material (ultraviolet ray passage control layer) of the pre-counterfeit prevention pressure-sensitive adhesive sheet to obtain the anti-counterfeit pressure-sensitive adhesive sheet of this example (see FIG. 6). ).

Example 7
Same as Example 1 for polyethylene terephthalate film (Lumirror 38 Q-37, manufactured by Toray Industries, Inc., thickness: 38 μm, containing UV absorber, surface roughness (Rz): 0.4 μm) as the first substrate A plurality of through holes were formed by irradiating with CO ₂ laser light, and the first base material was used as an ultraviolet ray passage control layer. The hole diameter of the through hole was 110 μm.

  Acrylic solvent adhesive (PIN1 manufactured by Lintec Co., Ltd.) is applied to the release treatment surface of a release material (Lintec Co., Ltd., 8LK Ao, thickness: 90 μm) on one side, and the thickness after drying is 20 μm. It was applied by means of a knife coater and dried at 90 ° C. for 1 minute. The first base material as the ultraviolet ray passage control layer was pressure-bonded to the first pressure-sensitive adhesive layer thus formed.

  On the other hand, 100 parts by mass of an acrylic solvent-based pressure-sensitive adhesive (manufactured by Lintec Corporation, PAT1) and 0.5 part by mass of a fluorescent agent (manufactured by Nippon Fluorescent Chemical Co., Ltd., Tokushu Koutai O-AN) The release treatment surface of the release material (Lintec Corporation, 8LK Ao, thickness 90 μm) subjected to the release treatment was coated with a knife coater so that the thickness after drying was 20 μm, and dried at 90 ° C. for 1 minute.

  A polyethylene terephthalate film as a second base material (manufactured by Toray Industries Inc., Lumirror 50T-60, thickness: 50 μm, surface roughness (Rz) is applied to the second pressure-sensitive adhesive layer as the ultraviolet coloring layer thus formed. : 0.4 μm).

  The release material is peeled off from the second pressure-sensitive adhesive layer of the obtained laminate, and the exposed second pressure-sensitive adhesive layer (ultraviolet color-developing layer) is pressure-bonded to the first base material (ultraviolet passage control layer) to prevent forgery. A pressure-sensitive adhesive sheet was obtained (see FIG. 7).

Example 8
In Example 3, instead of the polyethylene terephthalate film which is a translucent layer, a transparent polyethylene terephthalate film which is a second substrate (manufactured by Toray Industries, Inc., Lumirror 50T-60, thickness: 38 μm, surface roughness (Rz): 0.4 μm) and an anti-counterfeit pressure-sensitive adhesive sheet was prepared in the same manner as in Example 3 except that through holes (hole diameter: 110 μm) were formed only in the second pressure-sensitive adhesive layer.

Example 9
In Example 8, instead of the polyethylene terephthalate film (Lumirror 50T-60 manufactured by Toray Industries, Inc.) as the first base material, an ultraviolet-colorable urethane film (Lintec Co., Auro Rainbow C-180-R, thickness) : 50 μm) and an anti-counterfeit pressure-sensitive adhesive sheet was prepared in the same manner as in Example 8 except that an acrylic solvent-type pressure-sensitive adhesive (PIN1 manufactured by Lintec Corporation) was used as the material for the first pressure-sensitive adhesive layer. .

Example 10
In Example 4, instead of the polyethylene terephthalate film (Lumirror 50T-60 manufactured by Toray Industries, Inc.) as the first base material, an ultraviolet-coloring urethane film (Lintec Co., Auro Rainbow C-180-R, thickness) : 50 μm) and an anti-counterfeit pressure-sensitive adhesive sheet was prepared in the same manner as in Example 4 except that an acrylic solvent-type pressure-sensitive adhesive (PIN1 manufactured by Lintec Corporation) was used as the material for the first pressure-sensitive adhesive layer. .

[Comparative Example 1]
An anti-counterfeit pressure-sensitive adhesive sheet was prepared in the same manner as in Example 1 except that the diameter of the through hole was 400 μm.

[Test example]
The release material was peeled off from the anti-counterfeit pressure-sensitive adhesive sheet (10 cm × 10 cm) obtained in the examples, and the anti-counterfeit pressure-sensitive adhesive sheet was attached to a high-quality printed paper. Then, through hole appearance inspection, authenticity inspection, and transparency inspection were performed as follows.

(1) Through hole appearance inspection The anti-counterfeit pressure-sensitive adhesive sheet affixed to the high-quality paper was inspected by the naked eye under the indoor fluorescent lamp to see if the through hole was visible. The distance from the eyes to the adhesive sheet was about 30 cm, and the angle at which the adhesive sheet was viewed was variously changed. A case where the through-hole was not seen at all was represented by 1, a case where the through-hole was hardly seen was represented by 2, a case where the through-hole was hardly seen was represented by 3, and a case where the through-hole was seen was represented by 4. The results are shown in Table 1.

(2) True / False Inspection Whether or not the anti-counterfeit pressure-sensitive adhesive sheet affixed to the fine paper was irradiated with ultraviolet light by a black light (manufactured by ASONE, SLUV-4), and color development was observed in a fine dot pattern. I was inspected. A fine dot pattern in which color development was seen is represented by 1, and one in which color development was not seen is represented by 2. The results are shown in Table 1.

(3) Transparency inspection It was inspected whether the printing under the anti-counterfeiting adhesive sheet affixed to the fine paper was visible. The case where printing was seen is represented by 1, and the case where printing was not seen is represented by 2. The results are shown in Table 1.

  As can be seen from Table 1, according to the anti-counterfeit pressure-sensitive adhesive sheet obtained in the examples, the authenticity of the anti-counterfeit pressure-sensitive adhesive sheet can be confirmed. In addition, the anti-counterfeit pressure-sensitive adhesive sheet obtained in the examples is difficult to understand for anti-counterfeit, and is also excellent in transparency.

  The anti-counterfeit pressure-sensitive adhesive sheet of the present invention can be used for the prevention of counterfeiting / falsification of documents, photographs, printed matter, seals, pictures, drawings, and the like used for passports, certificate papers, seal certificates, and other certificates.

It is sectional drawing of the adhesive sheet for forgery prevention which concerns on the 1st Embodiment of this invention. It is sectional drawing of the adhesive sheet for forgery prevention which concerns on the 2nd Embodiment of this invention. It is sectional drawing of the adhesive sheet for forgery prevention which concerns on the 3rd Embodiment of this invention. It is sectional drawing of the adhesive sheet for forgery prevention which concerns on the 4th Embodiment of this invention. It is sectional drawing of the adhesive sheet for forgery prevention which concerns on the 5th Embodiment of this invention. It is sectional drawing of the adhesive sheet for forgery prevention which concerns on the 6th Embodiment of this invention. It is sectional drawing of the adhesive sheet for forgery prevention which concerns on the 7th Embodiment of this invention.

Explanation of symbols

1A, 1B, 1C, 1D, 1E, 1F, 1G ... Anti-counterfeit adhesive sheets 2A, 2B, 2C, 2D, 2E, 2F, 2G ... Base materials 3A, 3B, 3C, 3D, 3E, 3F, 3G ... Adhesive Agent layers 4A, 4B, 4C, 4D, 4E, 4F, 4G ... release materials 5B, 5E, 5F ... surface coat layer 6C ... translucent layer 7C, 7D, 7E, 7F, 7G ... second adhesive layer 8D, 8E, 8F, 8G ... 2nd base material 9F ... 3rd base material 10F ... 3rd adhesive layer H ... Through-hole

Claims (7)

An ultraviolet coloring layer that develops color upon irradiation with ultraviolet rays;
A through hole having a hole diameter of 300 μm or less and allowing ultraviolet light to pass therethrough is formed, and a portion other than the through hole includes an ultraviolet light passage control layer that blocks ultraviolet light,
The anti-counterfeit pressure-sensitive adhesive sheet, wherein the ultraviolet ray passage control layer is transparent.   The anti-counterfeit pressure-sensitive adhesive sheet according to claim 1, wherein the anti-counterfeit pressure-sensitive adhesive sheet is transparent when attached to an adherend. The anti-counterfeit pressure-sensitive adhesive sheet according to claim 1 or 2, wherein the anti-counterfeit pressure-sensitive adhesive sheet has a surface roughness (Rz) of 3.0 µm or more and 6.0 µm or less .   The anti-counterfeit pressure-sensitive adhesive sheet according to any one of claims 1 to 3, wherein a plurality of through holes of the ultraviolet ray passage control layer are formed in a predetermined arrangement.   The anti-counterfeit pressure-sensitive adhesive sheet according to any one of claims 1 to 4, wherein the anti-counterfeit pressure-sensitive adhesive sheet includes a pressure-sensitive adhesive layer, and the pressure-sensitive adhesive layer constitutes the ultraviolet coloring layer. An ultraviolet coloring layer that develops color when irradiated with ultraviolet rays and a through-hole that has a pore diameter of 300 μm or less and through which ultraviolet rays can pass are formed, and a portion other than the through-holes includes an ultraviolet passage control layer that blocks ultraviolet rays. The method for producing an anti-counterfeit pressure-sensitive adhesive sheet, wherein the ultraviolet ray passage control layer is transparent,
The manufacturing method of the adhesive sheet for forgery prevention characterized by including the process of forming the said through-hole with respect to the ultraviolet-ray shielding layer which shields an ultraviolet-ray, and setting it as the said ultraviolet-ray passage control layer. The method for producing an anti-counterfeit pressure-sensitive adhesive sheet according to claim 6, wherein the through hole is formed by laser processing.

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