JP2014213469A - Transfer medium and transcript - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transfer medium that is provided with two different kinds of forgery prevention effects by a single transfer medium, and a transcript having different forgery prevention effects on both sides by using the same.SOLUTION: A transfer medium 10 is formed by sequentially laminating a releasing layer 2, a hologram layer 3, a hologram reflection layer 4, a magnetic orientation layer 5 and an adhesive layer 6 on one surface of a base film 1. In the transfer medium 10, the magnetic orientation layer 5 is formed flush with a planar region of the hologram reflection layer 4. Also, a transcript is configured such that a hologram image is formed on one surface and a magnetic orientation pattern image is formed on the other surface, by using the transfer medium 10 and transferring to a transparent substrate.

Description

  The present invention relates to a transfer medium having two different anti-counterfeit effects and a transfer body capable of verifying authenticity from both the front and back sides by transferring it to a transparent transfer target.

  Conventionally, the means for preventing counterfeiting makes it difficult to imitate the article itself, or attaches an article that is difficult to imitate to the article as a real proof so that authenticity can be determined. There is something. For example, the former should be special to the material itself, such as banknotes and stock certificates, by subjecting the product itself to fine printing and watermarking, or using colors that are difficult to reproduce. As a result, counterfeiting by printing technology and counterfeiting by copying machines and scanners are difficult.

  However, recent advances in digital technology have made it possible to easily reproduce even fine printing processes and colors that have been difficult to counterfeit as described above with a color copy or a scanner. As a result, the printing process as a forgery prevention measure is further miniaturized, making duplication and forgery more difficult. However, as the miniaturization progresses in this way, the authenticity cannot be determined at a glance.

  Therefore, the diffraction grating pattern has been widely used as a means for easily authenticating at a glance by attaching an object that is difficult to counterfeit, such as the latter, to an article. Since the diffraction grating pattern is formed by special photographing, technique, and apparatus, it is evaluated that it is difficult to forge. However, once it is recognized by the market, forgery issues have arisen over time.

  Further measures have been proposed for the above problems. For example, in Patent Document 1, a peelable protective layer, a first diffractive structure forming layer, a light reflecting layer, a second diffractive structure forming layer different from the first diffractive structure forming layer, and a light reflecting material are formed on a single substrate. A diffraction structure transfer foil in which a layer and an adhesive layer are laminated has been proposed. In this proposal, in the article provided with the diffractive structure transfer foil, the diffracted light from the first diffractive structure layer can be observed from the peeling protective layer side, while the second diffractive structure is observed from the adhesive side on the back side. The diffracted light from the layer can be observed, and a more reliable anti-counterfeiting effect can be expected as compared with a conventional single diffraction grating.

  However, although the above proposal provides two different anti-counterfeiting effects, both are formed with a diffraction grating pattern, and are essentially the same as those using a conventional single diffraction grating. The problem remains.

JP 2009-134094 A

  An object of the present invention is to supply a transfer medium having two types of anti-counterfeit effects by different means using a single transfer medium, and a transfer body having different anti-counterfeit effects on the front and back using the transfer medium.

In the invention according to claim 1 of the present invention, a release layer, a hologram layer,
A transfer medium in which a hologram reflection layer, a magnetic alignment layer, and an adhesive layer are sequentially laminated,
The transfer medium is characterized in that the magnetic orientation layer is formed in the same plane area as the hologram reflection layer.

  Further, the invention according to claim 2 of the present invention transfers to a transparent substrate using the transfer medium according to claim 1 to form a hologram image on one surface and a magnetic orientation pattern image on the other surface. The transfer body characterized by being made.

  According to the invention of claim 1 of the present invention, the magnetic orientation layer is formed on one surface of the base film in the same manner as the planar area of the hologram reflection layer, so that a single transfer medium can be used. Thus, two image patterns having anti-counterfeiting effects can be formed by different means of the hologram layer provided with the hologram reflection layer as a base and the magnetic orientation pattern.

  According to the second aspect of the present invention, a hologram image can be visually recognized from one surface and a magnetic orientation pattern image can be visually recognized from the other surface by transferring to a transparent substrate using the transfer medium. A transcript can be provided. In other words, two types of anti-counterfeiting effect by different means of high-definition optical image anti-counterfeiting hologram image and complicated anti-counterfeiting effect of magnetic pattern due to magnetization orientation, making it easy to visually check for authenticity A transfer body having an anti-counterfeit effect can be provided. In addition, it is not necessary that the transfer target is entirely transparent. For example, if there is a transparent area in a part of the transfer target, the same effect can be obtained by transferring the transfer to that area.

1 is a schematic cross-sectional view showing an embodiment of a transfer medium of the present invention. 1 is a schematic cross-sectional view showing an embodiment of a transfer body of the present invention. The manufacturing process schematic which shows one Embodiment of the transfer medium of this invention.

Hereinafter, the present invention will be described in detail based on the drawings.
As shown in FIG. 1, a transfer medium 10 according to the present invention has a release layer 2, a hologram layer 3, a hologram reflection layer 4, a magnetic orientation layer 5, and an adhesive layer 6 sequentially laminated on one surface of a base film 1. It consists of a structure.

  Further, as shown in FIG. 2, the transfer medium 10 is superposed on the transfer body 7, heated and pressurized from the other surface of the transfer medium, cooled, and then peeled off to peel off the base film 1. A body 20 is obtained.

  For example, when the transfer body 20 is a transparent transfer body, a high-definition pattern of the hologram layer 3 can be visually recognized through the hologram reflection layer 4 when viewed from one surface, and is observed from the other surface. For example, the magnetic alignment layer 5 in which an arbitrary pattern is formed can be visually recognized, and patterns having different forgery prevention effects can be visually recognized on the front and back of the transfer body 20, and the authenticity determination with excellent reliability can be easily made visually.

  The transfer medium 10 is manufactured by a process as shown in FIG. Specifically, the release layer 2 is applied and formed on one surface of the base film 1 in FIG. 3A, and the hologram layer is laminated in FIG. 3B. Next, as shown in FIG. 3 (c), a separately manufactured hologram forming stamper is brought into close contact with the hologram layer 3, and heated and pressed to form a diffraction grating pattern on the hologram layer 3, thereby preventing the first forgery. Gives an effect.

  Next, as shown in FIG. 3D, a metal thin film such as aluminum is formed as the hologram reflection layer 4 on the entire surface of the hologram layer 3 on which the diffraction grating pattern is formed by vapor deposition or the like.

  Next, as shown in FIG. 3E, the magnetic orientation layer 5 is patterned on the hologram reflection layer 4 by a screen printing method or the like, and then, as shown in FIG. Thus, an arbitrary magnetic orientation pattern is formed as a second forgery prevention effect.

  Thereafter, as shown in FIG. 3G, by using the magnetic alignment layer 5 with the magnetic alignment pattern formed as a mask, unnecessary portions of the hologram reflection layer 4 are removed by etching, thereby having a first forgery prevention effect. A magnetic orientation layer 5 having the same anti-counterfeiting effect as the hologram reflection layer 4 having metallic gloss is formed.

  Finally, as shown in FIG. 3 (h), the transfer medium 10 having two different forgery prevention effects can be produced by laminating an adhesive layer on the entire surface.

  The base film 1 according to the present invention is not particularly limited as long as it has physical strength and heat resistance. For example, a polyester film, a polyamide film, a polypropylene film, a cellulose film, and the like can be used. Among them, a polyester film having a low physical strength, heat resistance, smoothness, and few fish eyes is preferable. The thickness of the film is preferably 10 to 50 μm in terms of productivity and cost.

  The release layer 2 serves to facilitate the release from the base film 1 after thermal transfer to the transfer target, and also serves as a protective layer since it becomes the outermost layer after transfer. Resins excellent in heat resistance, scratch resistance, chemical resistance, and transparency are preferable, and thermoplastic resins, thermosetting resins, and ionizing radiation curable resins that are cured by ultraviolet rays or electron beams can be used. . For example, acrylic resin, polyester resin, polyamide imide resin, and the like. These resins can be used alone or in combination.

  For the holographic layer 3 on which the diffraction grating, which is the first anti-counterfeit effect, is formed, a thermoplastic resin, a thermosetting resin, an ionizing radiation curable resin that is cured by ultraviolet rays, an electron beam, or the like can be used. For example, acrylic resins include acrylic resins, epoxy resins, cellulose resins, vinyl resins, and the like. In addition, urethane-based resins, melamine-based resins, phenol-based resins, and the like obtained by adding isocyanate as a crosslinking agent to an acrylic polyol or polyester polyol having a reactive hydroxyl group can be used. Moreover, as ionizing radiation curable resin, epoxy (meth) acrylate, urethane (meth) acrylate, etc. can be used.

  For example, when a resin composition containing an ultraviolet curable resin is used, the hologram layer 3 is coated with the resin composition by a known coating method, and a separately prepared hologram layer forming stamper is stacked on the base film. It is obtained by irradiating with ultraviolet rays from one side and then removing the stamper. The thickness of the hologram layer 3 is preferably 0.1 to 10 μm.

  The hologram reflection layer 4 is for enhancing the diffraction grating pattern formed as the hologram layer 3 in an easy-to-see manner, and is preferably a metal or metal oxide having a high surface reflectance. For example, a single metal such as aluminum, silver, chromium, nickel, copper, tin, or an oxide thereof can be used. Further, as the film formation method, a vacuum deposition method or a sputtering method can be used, and the film thickness is preferably about 1 to 1000 nm.

Next, the magnetic orientation layer 5 on which the magnetic orientation pattern, which is the second anti-counterfeiting effect, is formed by forming a resin composition containing a magnetic material by a known printing method as shown in FIG. Can do. As the printing method, the screen printing method is preferable in consideration of the viscosity of the resin composition and the size of the magnetic material. The film thickness for printing is preferably 1 to 20 μm.

  The said resin composition which comprises the magnetic orientation layer 5 consists of a magnetic body and binder resin. As the magnetic material, for example, Fe, Fe-Si, Fe-Al, Fe-Ni, Fe-Co and the like can be used, and the form thereof may be any of particles, linear, scale-like, The size is preferably 1-10 μm. In particular, if the magnetic material has light reflectivity or light interference, the shape is preferably the scale shape.

  Further, as the binder resin, an ionizing radiation curable resin is preferable, and an ultraviolet curable resin is more preferable. As shown in FIG. 3G, the magnetic alignment layer 5 also functions as a mask when the unnecessary hologram reflection layer 4 is removed by etching. Therefore, an ionizing radiation curable resin excellent in etching resistance is preferable. But there is.

  The magnetic orientation pattern which is the second anti-counterfeit effect is to temporarily form the magnetic pattern by printing (applying) the resin composition and then magnetically orienting the magnetic material in a state where the resin composition is uncured, The magnetic pattern can be fixed by curing while maintaining the state. For example, if the binder resin is an ultraviolet curable resin, it can be instantaneously cured by irradiation with ultraviolet rays. In addition, as a magnetic orientation method, well-known methods, such as a counter magnet and a Helmholtz coil, can be used, for example.

  As the adhesive layer 6, a thermoplastic resin such as a polyester resin, an acrylic resin, a vinyl chloride resin, a rubber resin, a polyamide resin, or a polyvinyl acetate resin can be used, and is selected in consideration of the material of the transfer object 7. Is done. As a method of applying the adhesive forming composition obtained by varnishing the above resin with a solvent, a known gravure coating or roll coating method can be used. The thickness of the adhesive layer 6 after drying is preferably 1 to 20 μm.

  The transfer object 7 according to the present invention is mainly a resin molded product such as a polyester resin, an acrylic resin, and a vinyl chloride resin, a film, a sheet, and the like, but can also be applied to a paper product. If the transfer object 7 is transparent, two different forgery prevention effects can be confirmed from the front and back by transferring the transfer medium of the present invention, and authenticity verification can be performed with higher reliability. Therefore, it is not necessary for the transfer target to be entirely transparent, and if there is a transparent area in a part of the transfer target, the same effect can be obtained by transferring the transfer to that area. For example, it is possible to cope with a part of the colored molded product made of the resin being transparent or a paper with a watermark.

Hereinafter, the present invention will be described specifically by way of examples.
On one side of a 16 μm thick PET (polyethylene terephthalate) film, a release layer forming composition made of an acrylic resin is applied by a gravure coating method so that the film thickness after drying is 1 μm, dried and peeled off A layer was formed.

  Next, the composition for forming a hologram layer containing an ultraviolet curable resin on the release layer was applied and dried by a gravure coating method so that the thickness after drying was 1 μm. Thereafter, separately prepared hologram layer forming stampers were superposed, and ultraviolet rays were irradiated from the other side of the PET film to form a hologram layer.

  Next, aluminum was deposited on the entire surface of the hologram layer by a vacuum deposition method to form a hologram reflection layer having a thickness of 50 nm.

Thereafter, a composition for forming a magnetic alignment layer (varnish) comprising the following composition on the hologram reflective layer:
Was used to form a pattern by a screen printing method.
<Composition for forming magnetic orientation layer>
・ Magnetic substance: 8 parts by weight of scaly light interference magnetic pigment ・ Binder resin: 40 parts by weight of acrylic oligomer ・ Photoinitiator: 2 parts by weight of Irgacure 184 ・ Solvent: 50 parts by weight of cyclohexanone

  Next, the pattern shape obtained above is magnetically oriented in an uncured state to temporarily form a magnetic pattern, and further, the magnetic pattern is fixed by irradiating with ultraviolet rays while maintaining the state, and the magnetic orientation is fixed. A layer was formed.

  Next, etching with an alkaline solution was performed using the magnetic alignment layer as a mask to remove unnecessary aluminum other than aluminum (hologram reflection layer) immediately below the magnetic alignment layer.

  Next, a vinyl chloride adhesive was applied to the entire surface of one surface of the PET film by a gravure coating method so that the film thickness after drying was 2 μm, and an adhesive layer was formed to prepare a transfer medium.

The transfer medium was superposed on a transparent PP (polypropylene) substrate and pressed with a rubber roll heated to 200 ° C. to prepare a transfer body.
When the obtained transfer body was observed from the transfer side (surface), the hologram image was clearly visible by the hologram reflection layer of the aluminum thin film. When observed from the back side, the magnetic pattern was clearly visible in the same shape as the hologram reflection layer.

  By using the transfer medium of the present invention to transfer a part of the article with a transparent region, different forgery prevention effects can be imparted on the front and back sides, and the authenticity of the article can be easily judged with high reliability visually. Can be obtained.

DESCRIPTION OF SYMBOLS 1 ... Base film 2 ... Release layer 3 ... Hologram layer 4 ... Hologram reflective layer 5 ... Magnetic orientation layer 6 ... Adhesive layer 7 ... Transfer object 10 ... Transfer medium 20... Transfer body

Claims (2)

A transfer medium in which a release layer, a hologram layer, a hologram reflection layer, a magnetic orientation layer, a colored ink layer, and an adhesive layer are sequentially laminated on one surface of a base film,
The transfer medium, wherein the magnetic orientation layer is formed in the same area as the planar area of the hologram reflection layer.   A transfer body, wherein the transfer medium according to claim 1 is transferred to a transparent substrate to form a hologram image on one surface and a magnetic orientation pattern image on the other surface.

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