JP2009003195A - Volume hologram transfer foil and volume hologram layered product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a volume hologram transfer foil, capable of manufacturing a volume hologram layered product having a high forgery preventive function. <P>SOLUTION: The above subject is solved by providing the volume hologram transfer foil including: a base material; a volume hologram layer where a volume hologram reproduced by ultraviolet rays is recorded, and which is formed on the base material; and a heat seal layer containing thermoplastic resin, which is formed on the volume hologram layer. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a volume hologram transfer foil used for producing a volume hologram laminate by transferring a volume hologram layer to a transfer target, and a volume hologram laminate.

  A hologram is the one where the wavefront of object light is recorded on the photosensitive material as interference fringes by interfering two lights with the same wavelength (object light and reference light), and the same wavelength as the reference light at the time of interference fringe recording When the light is applied, a diffraction phenomenon occurs due to interference fringes, and the same wavefront as that of the original object light can be reproduced. Holograms are widely used for security applications and the like because they have advantages such as beautiful appearance and relatively difficult replication. In particular, in plastic cards represented by credit cards, cash cards, and the like, hologram-attached cards have been widely used mainly from the viewpoint of preventing duplication and imparting design properties.

  Such holograms can be classified into several types depending on the recording pattern of interference fringes, but typically can be classified into surface relief holograms and volume holograms. Here, the surface relief hologram is a hologram recorded by forming a fine uneven pattern on the surface of the hologram layer. On the other hand, the volume hologram is a hologram recorded by three-dimensionally drawing interference fringes generated by light interference as stripes having different refractive indexes in the thickness direction. Among these, since the volume hologram is a hologram image recorded by the difference in refractive index of the material, it has the advantage that it is difficult to duplicate compared to the relief hologram, so that securities and cards can be used. It is expected to be used as an anti-counterfeiting measure.

  Further, in the case of using a hologram as a design imparting or forgery prevention means, etc., as a method for imparting a hologram to securities, cards, etc., for example, a method of weaving a slit-shaped hologram or a hologram visible from the outside As described above, a method of embedding in a medium is known. Generally, a method of attaching a hologram at a predetermined position is used. Among them, as a simple method, a method of sticking a hologram at a predetermined position by transferring a hologram from a hologram transfer foil in which a hologram is formed on an arbitrary base material has been widely used.

  Here, the hologram transfer foil has a configuration in which a hologram layer in which a hologram is recorded on a base material and a heat seal layer having thermal adhesiveness are laminated in this order, and the heat seal layer The hologram layer has a function of transferring the hologram layer onto the transfer medium. Such a hologram transfer foil is disclosed in Patent Documents 1 and 2, for example.

  By the way, the hologram has been conventionally used for various purposes as an anti-counterfeiting means because it has been difficult to duplicate, but in recent years, a technique for simply duplicating a hologram has begun to spread. It has been pointed out that using a simple hologram is not sufficient as a means for preventing forgery. For this reason, the hologram transfer foil is also required to have a higher anti-counterfeit function and to transfer a hologram with excellent security.

JP 2003-316239 A Japanese Patent Laid-Open No. 2005-3809

  The present invention has been made in view of such a situation, and a main object of the present invention is to provide a volume hologram transfer foil capable of producing a volume hologram laminate excellent in forgery prevention function. is there.

  In order to solve the above-mentioned problems, the present invention provides a base material, a volume hologram layer on which the volume hologram reproduced by ultraviolet rays is recorded, and a thermoplastic film formed on the volume hologram layer. A volume hologram transfer foil characterized by having a heat seal layer containing a resin.

According to the present invention, the volume hologram recorded in the volume hologram layer is reproduced by ultraviolet rays, so that the volume hologram can be visually recognized under normal visible light conditions such as under an indoor fluorescent lamp. Therefore, as long as the volume hologram laminate is used under normal visible light conditions such as indoor fluorescent lamps using the volume hologram transfer foil of the present invention, the presence of the volume hologram layer can be easily made from the outside. It can be made unrecognizable. For this reason, according to the volume hologram transfer foil of the present invention, it is possible to produce a volume hologram laminate in which it is difficult to know from the outside that a volume hologram is used as a forgery prevention means.
For these reasons, according to the present invention, a volume hologram transfer foil capable of producing a volume hologram laminate excellent in the forgery prevention function can be obtained.

In the present invention, it is preferable that a fluorescent light-emitting layer containing a fluorescent material that emits fluorescence when irradiated with ultraviolet rays is formed between the volume hologram layer and the heat seal layer. By forming such a fluorescent light emitting layer, the volume hologram transfer foil of the present invention can be made capable of producing a volume hologram laminate having a more excellent anti-counterfeit function.
Further, by matching the wavelength of the ultraviolet light for reproducing the volume hologram recorded in the volume hologram layer with the wavelength of the ultraviolet light for emitting fluorescence of the fluorescent material, the region where the volume hologram is recorded is described above. Since it is possible to prevent fluorescence from being emitted from the fluorescent light-emitting layer, for example, by recording the volume hologram in a pattern, a volume hologram laminate excellent in design is produced using the volume hologram transfer foil of the present invention. It is also possible to do.

  In the present invention, an ultraviolet absorbing layer that absorbs ultraviolet rays capable of emitting fluorescence of the fluorescent material is preferably formed in a pattern between the base material and the volume hologram layer. . Thereby, since it is possible to prevent the fluorescent material from emitting fluorescence in the region where the ultraviolet absorbing layer is formed, the volume hologram laminate excellent in design using the volume hologram transfer foil of the present invention. It is because it becomes possible to produce.

  Furthermore, in this invention, it is preferable that the peelable protective layer is formed between the said volume hologram layer and the said base material. By forming the peelable protective layer, the adhesiveness between the substrate and the volume hologram layer can be adjusted. As a result, the volume hologram layer is transferred from the volume hologram transfer foil of the present invention. This is because the peelability of the volume hologram layer can be improved when producing the laminate. Further, when the volume hologram laminate is produced using the volume hologram transfer foil of the present invention, the peelable protective layer is transferred together with the volume hologram layer, so that the transferred volume hologram layer is peelable protected. This is because it can be protected by a layer.

  The present invention relates to a transferred body, a heat seal layer formed on the transferred body and containing a thermoplastic resin, and a volume hologram recorded on the heat seal layer and reproduced by ultraviolet rays. A volume hologram laminate, comprising: a hologram layer.

According to the present invention, the volume hologram recorded in the volume hologram layer is reproduced by ultraviolet rays, so that the volume hologram can be visually recognized under normal visible light conditions such as under an indoor fluorescent lamp. Therefore, as long as the volume hologram laminate of the present invention is used under normal visible light conditions such as indoor fluorescent lamps, the presence of the volume hologram layer cannot be easily recognized from the outside. can do. For this reason, according to the present invention, it is possible to produce a volume hologram laminate in which it is difficult to know from the outside that a volume hologram is used as a forgery preventing means.
Therefore, according to the present invention, a volume hologram laminate excellent in the forgery prevention function can be obtained.

  The present invention has an effect of providing a volume hologram transfer foil capable of producing a volume hologram laminate having a high anti-counterfeit function.

The present invention relates to a volume hologram transfer foil and a volume hologram laminate.
Hereinafter, the volume hologram transfer foil and the volume hologram laminate of the present invention will be described in order.

A. Volume hologram transfer foil First, the volume hologram transfer foil of the present invention will be described. The volume hologram transfer foil of the present invention comprises a base material, a volume hologram layer formed on the base material, on which a volume hologram reproduced by ultraviolet rays is recorded, and formed on the volume hologram layer. It has the heat seal layer to contain.

  Such a volume hologram transfer foil of the present invention will be described with reference to the drawings. FIG. 1 is a schematic sectional view showing an example of the volume hologram transfer foil of the present invention. As illustrated in FIG. 1, a volume hologram transfer foil 10 of the present invention includes a base material 1, a volume hologram layer 2 formed on the base material 1 and recorded with a volume hologram reproduced by ultraviolet rays, and the above It has a heat seal layer 3 formed on the volume hologram layer 2 and containing a thermoplastic resin.

According to the present invention, the volume hologram recorded in the volume hologram layer is reproduced by ultraviolet rays, so that the volume hologram can be visually recognized under normal visible light conditions such as under an indoor fluorescent lamp. Therefore, as long as the volume hologram laminate is used under normal visible light conditions such as indoor fluorescent lamps using the volume hologram transfer foil of the present invention, the presence of the volume hologram layer can be easily made from the outside. It can be made unrecognizable. For this reason, according to the volume hologram transfer foil of the present invention, it is possible to produce a volume hologram laminate in which it is difficult to know from the outside that a volume hologram is used as a forgery prevention means.
For these reasons, according to the present invention, a volume hologram transfer foil capable of producing a volume hologram laminate excellent in the forgery prevention function can be obtained.

The volume hologram transfer foil of the present invention has at least a base material, a volume hologram layer, and a heat seal layer, and other arbitrary configurations may be used as necessary.
Hereafter, each structure used for the volume hologram transfer foil of this invention is demonstrated in order.

1. Volume hologram layer First, the volume hologram layer used in the present invention will be described. The volume hologram layer used in the present invention is recorded with a volume hologram reproduced by ultraviolet rays. When the volume hologram laminate is manufactured using the volume hologram transfer foil of the present invention, the volume hologram layer is transferred to the transfer target. It is what is done.
Hereinafter, such a volume hologram layer will be described in detail.

(1) Volume hologram The volume hologram recorded on the volume hologram layer used in the present invention can be reproduced by ultraviolet rays. Here, since the volume hologram is recorded by three-dimensionally drawing interference fringes generated by light interference in the thickness direction as fringes having different refractive indexes, the volume hologram can be reproduced by ultraviolet rays. Being possible means that the interval between the interference fringes recorded in the volume hologram layer matches the wavelength region of ultraviolet rays. The wavelength at which the volume hologram in the present invention is reproduced can be appropriately determined according to the use of the volume hologram laminate produced using the volume hologram transfer foil of the present invention, and in particular, 100 nm. It is preferably in the range of ˜400 nm, and more preferably in the range of 200 nm to 400 nm.

  In addition, when the fluorescent light emitting layer described later is used for the volume hologram transfer foil of the present invention, the wavelength at which the volume hologram in the present invention is reproduced is the wavelength of ultraviolet light that emits fluorescence when irradiated to the fluorescent light emitting layer. May be the same or different. In the case where these wavelengths are the same, in the volume hologram laminate manufactured using the volume hologram transfer foil of the present invention, in the area where the volume hologram is recorded, the fluorescence emission layer does not emit fluorescence. Therefore, for example, by recording the volume hologram in a pattern, it is possible to produce a volume hologram laminate excellent in design using the volume hologram transfer foil of the present invention. Have.

(2) Constituent material The material constituting the volume hologram layer used in the present invention is not particularly limited as long as it can record a volume hologram that can be reproduced by ultraviolet rays. The material used for the can be arbitrarily used. Examples of such a material include known volume hologram recording materials such as silver salt materials, dichromated gelatin emulsions, photopolymerizable resins, and photocrosslinkable resins. i) a first photosensitive material containing a binder resin, a photopolymerizable compound, and a photopolymerization initiator, or (ii) a cationic polymerizable compound, a radical polymerizable compound, a photo radical polymerization initiator system, and a photo cationic polymerization. A second photosensitive material comprising an initiator system can be suitably used.
Hereinafter, the first photosensitive material and the second photosensitive material will be described in order.

(I) First photosensitive material First, the first photosensitive material will be described. As described above, the first photosensitive material contains a binder resin, a photopolymerizable compound, and a photopolymerization initiator.

(Binder resin)
Examples of the binder resin include at least one copolymerizable monomer group such as poly (meth) acrylic acid ester or a partially hydrolyzed product thereof, polyvinyl acetate or a hydrolyzed product thereof, acrylic acid, and an acrylic acid ester. As a polymerization component, or a mixture thereof, polyisoprene, polybutadiene, polychloroprene, polyvinyl acetal which is a partial acetalization product of polyvinyl alcohol, polyvinyl butyral, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, etc. Or a mixture thereof. Here, when the volume hologram layer is formed, a step of moving the monomer by heating may be performed in order to stabilize the recorded volume hologram. For this reason, it is preferable that the binder resin used in the present invention has a relatively low glass transition temperature and can easily move the monomer.

(Photopolymerizable compound)
As the photopolymerizable compound, there can be used photopolymerization having at least one ethylenically unsaturated bond in one molecule, photocrosslinkable monomer, oligomer, prepolymer and a mixture thereof as described later. . Specific examples include unsaturated carboxylic acids and salts thereof, esters of unsaturated carboxylic acids and aliphatic polyhydric alcohol compounds, amide compounds of unsaturated carboxylic acids and aliphatic polyvalent amine compounds, and the like.

  Here, specific examples of the unsaturated carboxylic acid monomer include acrylic acid, methacrylic acid, itaconic acid, crotonic acid, isocrotonic acid, maleic acid and the like. Specific examples of the ester monomer of the aliphatic polyhydric alcohol compound and the unsaturated carboxylic acid include, for example, acrylic acid esters such as ethylene glycol diacrylate, triethylene glycol diacrylate, and 1,3-butanediol diacrylate. , Tetramethylene glycol diacrylate, propylene glycol diacrylate, neopentyl glycol diacrylate, trimethylolpropane triacrylate, trimethylolpropane tri (acryloyloxypropyl) ether, trimethylolethane triacrylate, and the like.

  Examples of the methacrylic acid ester include tetramethylene glycol dimethacrylate, triethylene glycol dimethacrylate, neopentyl glycol dimethacrylate, trimethylolpropane trimethacrylate, and trimethylolethane trimethacrylate. Examples of the itaconic acid ester include ethylene glycol diitaconate, propylene glycol diitaconate, and 1,3-butanediol diitaconate. Examples of the crotonic acid ester include ethylene glycol dicrotonate, tetramethylene glycol dicrotonate, pentaerythritol dicrotonate, and sorbitol tetracrotonate. Furthermore, examples of the isocrotonic acid ester include ethylene glycol diisocrotonate, pentaerythritol diisocrotonate, and sorbitol tetraisocrotonate. Furthermore, examples of the maleic ester include ethylene glycol dimaleate, triethylene glycol dimaleate, pentaerythritol dimaleate, and sorbitol tetramaleate.

Examples of the halogenated unsaturated carboxylic acid include 2,2,3,3-tetrafluoropropyl acrylate, 1H, 1H, 2H, 2H-heptadecafluorodecyl acrylate, 2,2,3,3-tetrafluoropropyl methacrylate, and the like. Can be mentioned.
Specific examples of the amide monomer of the unsaturated carboxylic acid and the aliphatic polyvalent amine compound include methylene bisacrylamide, methylene bismethacrylamide, 1,6-hexamethylene bisacrylamide, 1,6-hexamethylene bis. And methacrylamide.

(Photopolymerization initiator)
Examples of the photopolymerization initiator used in the present invention include 1,3-di (t-butyldioxycarbonyl) benzophenone, 3,3 ′, 4,4′-tetrakis (t-butyldioxycarbonyl) benzophenone, Examples thereof include N-phenylglycine, 2,4,6-tris (trichloromethyl) -s-triazine, 3-phenyl-5-isoxazolone, 2-mercaptobenzimidazole, and imidazole dimers. Among them, the photopolymerization initiator used in the present invention is preferably one that is decomposed after hologram recording from the viewpoint of stabilizing the recorded volume hologram. For example, organic peroxides are preferable because they are easily decomposed by irradiation with ultraviolet rays.

(Ii) Second Photosensitive Material Next, the second photosensitive material used in the present invention will be described. As described above, the second photosensitive material contains a cationic polymerizable compound, a radical polymerizable compound, a photo radical polymerization initiator system, and a cationic polymerization initiator system.

  Here, when such a second photosensitive material is used, a method for recording a volume hologram on the volume hologram layer is to irradiate light such as laser light that is photosensitized by a photo radical polymerization initiator system, and then to photo cation. A method of irradiating light having a wavelength different from that of the laser light that the polymerization initiator system is sensitive to will be used.

(Cationically polymerizable compound)
As the cationic polymerizable compound, a liquid compound at room temperature is preferably used because it is preferable that the polymerization of the radical polymerizable compound is performed in a composition having a relatively low viscosity. Examples of such cationically polymerizable compounds include diglycerol diether, pentaerythritol polydiglycidyl ether, 1,4-bis (2,3-epoxypropoxyperfluoroisopropyl) cyclohexane, sorbitol polyglycidyl ether, 1,6- Examples thereof include hexanediol glycidyl ether, polyethylene glycol diglycidyl ether, and phenyl glycidyl ether.

(Radically polymerizable compound)
As the radical polymerizable compound, those having at least one ethylenically unsaturated double bond in the molecule are preferable. The average refractive index of the radical polymerizable compound used in the present invention is preferably larger than the average refractive index of the cationic polymerizable compound, and more preferably 0.02 or more. This is because a volume hologram is formed by the difference in refractive index between the radical polymerizable compound and the cationic polymerizable compound. Therefore, when the average refractive index difference is not more than the above value, the refractive index modulation becomes insufficient. Examples of the radical polymerizable compound used in the present invention include acrylamide, methacrylamide, styrene, 2-bromostyrene, phenyl acrylate, 2-phenoxyethyl acrylate, 2,3-naphthalenedicarboxylic acid (acryloxyethyl) monoester, Examples thereof include methylphenoxyethyl acrylate, nonylphenoxyethyl acrylate, and β-acryloxyethyl hydrogen phthalate.

(Photo radical polymerization initiator system)
As the radical photopolymerization initiator system used in the present invention, any active radical can be generated by the first exposure when the volume hologram is recorded, and the active radical can polymerize the radical polymerizable compound. It is not particularly limited.

(Photocationic polymerization initiator system)
The cationic photopolymerization initiator system used in the present invention has low photosensitivity for the first exposure when a volume hologram is recorded, and is sensitive to post-exposure by irradiating light having a wavelength different from that of the first exposure. The initiator system is not particularly limited as long as it generates a Bronsted acid or a Lewis acid and polymerizes a cationically polymerizable compound. In particular, in the present invention, it is particularly preferable to use a compound that does not polymerize the cationic polymerizable compound during the first exposure.

(Other)
In the second photosensitive material, a binder resin, a thermal polymerization inhibitor, a silane coupling agent, a plasticizer, a colorant, and the like may be used in combination as necessary. The binder resin is used to improve the film formability and film thickness uniformity of the composition before hologram formation, and to stabilize interference fringes formed by polymerization by irradiation with light such as laser light until post-exposure. Used to make it exist. The binder resin only needs to be compatible with the cationic polymerizable compound or the radical polymerizable compound. For example, a copolymer of chlorinated polyethylene, polymethyl methacrylate, methyl methacrylate and other alkyl (meth) acrylates. And a copolymer of vinyl chloride and acrylonitrile, polyvinyl acetate, and the like. The binder resin may have reactivity such as a cation polymerizable group in its side chain or main chain.

(Measurement method of refractive index)
Here, the refractive index of the resin obtained by adding a photocationic polymerization initiator to the cationic polymerizable compound can be measured as follows. That is, a resin obtained by adding a photocationic polymerization initiator to the above cationic polymerizable compound to a surface release-treated PET film (for example, trade name “SP-PET” 50 μm, manufactured by Tosero Co., Ltd.) The coating is applied to a thickness of about 20 μm, thermally dried, and then cured by irradiation with ultraviolet rays. Next, the surface release treated PET film is peeled from the layer of the cationic polymerizable compound + photo cationic polymerization initiator / surface release treatment PET film to produce a single layer of the cationic polymerizable compound + photo cationic polymerization initiator. . Monobromonaphthalene as a refractive index compensation solution using a monolayer of the cationic polymerizable compound + photo cationic polymerization initiator prepared as described above, using a refractive index measuring device (manufactured by Atago Co., Ltd., multiwavelength Abbe refractometer DR-M4). Is used to measure the refractive index at a measurement wavelength of 589 nm.
In addition, also about resin obtained by adding radical photopolymerization initiator to a radically polymerizable compound, a refractive index can be measured by the method similar to the above.

(3) Others The thickness of the volume hologram layer used in the present invention is not particularly limited as long as it is within a range in which a predetermined volume hologram can be recorded, and is appropriately adjusted according to the type of the constituent material described above. can do. In particular, the thickness of the volume hologram layer used in the present invention is preferably in the range of 1 μm to 50 μm, and particularly preferably in the range of 3 μm to 25 μm.

2. Next, the heat seal layer used in the present invention will be described. The heat seal layer used in the present invention contains a thermoplastic resin, and when the volume hologram laminate is manufactured using the volume hologram transfer foil of the present invention, the volume hologram layer and the transfer target are bonded. It has a function.
Hereinafter, the heat seal layer used in the present invention will be described in detail.

  The thermoplastic resin used in the present invention is not particularly limited as long as it can adhere the volume hologram layer and the transferred object depending on the type of the transferred object to which the volume hologram layer is transferred from the volume hologram transfer foil of the present invention. It is not particularly limited. Examples of such thermoplastic resins include maleic acid-modified vinyl chloride-vinyl acetate copolymer resins, ethylene-vinyl acetate copolymer resins, vinyl chloride-vinyl acetate copolymer resins, polyamide resins, polyester resins, polyethylene resins, ethylene -Isobutyl acrylate copolymer resin, butyral resin, polyvinyl acetate and its copolymer resin, ionomer resin, acid-modified polyolefin resin, acrylic / methacrylic (meth) acrylic resin, acrylic ester resin, ethylene・ (Meth) acrylic acid copolymer, ethylene / (meth) acrylic ester copolymer, polymethyl methacrylate resin, cellulose resin, polyvinyl ether resin, polyurethane resin, polycarbonate resin, polypropylene resin, epoxy resin, Nord resin, vinyl resin, maleic resin, alkyd resin, polyethylene oxide resin, urea resin, melamine resin, melamine alkyd resin, silicone resin, rubber resin, styrene butadiene styrene block copolymer (SBS), styrene isoprene styrene Examples thereof include a block copolymer (SIS), a styrene ethylene butylene styrene block copolymer (SEBS), and a styrene ethylene propylene styrene block copolymer (SEPS). In the present invention, any of these thermoplastic resins can be suitably used.

  In addition, the thermoplastic resin used for this invention may be only 1 type, or 2 or more types may be sufficient as it.

  The heat seal layer used in the present invention may contain other additives in addition to the thermoplastic resin. Examples of the additive used in the present invention include a dispersant, a filler, a plasticizer, and an antistatic agent.

  The thickness of the heat seal layer used in the present invention is not particularly limited, and the type of volume hologram layer foil, the type of transfer target to which the volume hologram layer is transferred using the volume hologram transfer foil of the present invention, etc. However, it is usually preferably in the range of 0.3 μm to 50 μm, and more preferably in the range of 0.5 μm to 25 μm. This is because if the thickness is less than the above range, the adhesiveness to the transferred object may be insufficient. If it is thicker than the above range, the temperature for heating the heat seal layer becomes too high when transferring the volume hologram layer from the volume hologram transfer foil of the present invention, which may cause damage to the substrate and the like. Because there is.

3. Next, the substrate used in the present invention will be described. The base material used in the present invention has a function of supporting the volume hologram layer and the heat seal layer described above.

  The substrate used in the present invention is not particularly limited as long as it can support the volume hologram layer and the heat seal layer. Specific examples of such a substrate include, for example, a polyethylene film, a polypropylene film, a polyvinyl fluoride film, a polyvinylidene fluoride film, a polyvinyl chloride film, a polyvinylidene chloride film, an ethylene-vinyl alcohol copolymer film, and polyvinyl. Alcohol film, polymethyl methacrylate film, polyethersulfone film, polyetheretherketone film, polyamide film, tetrafluoroethylene-perfluoroalkylvinylether copolymer film, polyester film such as polyethylene terephthalate film, resin film such as polyimide film, etc. Can be mentioned.

  The thickness of the substrate used in the present invention is appropriately selected according to the use and type of the volume hologram laminate produced by the present invention, but is usually 2 μm to 200 μm, preferably 10 μm to 50 μm. Within the range of

4). Arbitrary Configuration The volume hologram transfer foil of the present invention has at least the above-mentioned substrate, volume hologram layer, and heat seal layer, but any other configuration other than these can be used as necessary. The arbitrary structure used for this invention is not specifically limited, According to the use etc. of the volume hologram laminated body manufactured using the volume hologram transfer foil of this invention, it can select suitably and can be used. Among them, as an arbitrary configuration suitably used in the present invention, a fluorescent light-emitting layer that is formed between the heat seal layer and the volume hologram layer and contains a fluorescent material that emits fluorescence when irradiated with ultraviolet rays, Examples include a peelable protective layer formed between the substrate and the volume hologram layer. In addition, when the fluorescent light emitting layer is used, it is further formed as a pattern between the base material and the volume hologram layer as another configuration, and emits fluorescence of the fluorescent material contained in the fluorescent light emitting layer. And an ultraviolet absorbing layer that absorbs ultraviolet rays that can be absorbed.
Hereinafter, each of these components will be described in order.

(1) Peelable protective layer First, the peelable protective layer will be described. The peelable protective layer is formed between the base material and the volume hologram layer.

  The case where a peelable protective layer is used for the volume hologram transfer foil of the present invention will be described with reference to the drawings. FIG. 2 is a schematic sectional view showing an example in which a peelable protective layer is used in the volume hologram transfer foil of the present invention. As illustrated in FIG. 2, a peelable protective layer 4 may be formed between the substrate 1 and the volume hologram layer 2 in the volume hologram transfer foil 10 ′ of the present invention.

By using the peelable protective layer for the volume hologram transfer foil of the present invention, advantageous effects are obtained in the following two points.
First, since the peelable protective layer is used, the adhesive force between the substrate and the volume hologram layer can be adjusted to an arbitrary range. Therefore, the volume hologram layer is removed from the volume hologram transfer foil of the present invention. When transferring, the peelability of the volume hologram layer from the substrate can be improved.
Second, by using the peelable protective layer, the surface of the volume hologram layer is covered with the peelable protective layer when the volume hologram layer is transferred to the transfer object using the volume hologram transfer foil of the present invention. Therefore, the transferred volume hologram layer can be protected by the peelable protective layer.

  Examples of the material used for the peelable protective layer used in the present invention include acrylic and methacrylic resins such as polymethyl acrylate and polymethyl methacrylate, polyvinyl chloride resin, cellulose resin, silicone resin, chlorinated rubber, casein, Examples include various surfactants, metal oxides, or a mixture of two or more.

(2) Fluorescent Light-Emitting Layer Next, the fluorescent light-emitting layer used in the present invention will be described. The fluorescent light emitting layer used in the present invention is formed between the volume hologram layer and the heat seal layer, and contains a fluorescent material that emits fluorescence when irradiated with ultraviolet rays.

  The case where a fluorescent light emitting layer is used for the volume hologram transfer foil of this invention is demonstrated, referring a figure. FIG. 3 is a schematic sectional view showing an example in which a fluorescent light emitting layer is used in the volume hologram transfer foil of the present invention. As illustrated in FIG. 3, the volume hologram transfer foil 10 ″ of the present invention has a fluorescent emission containing a fluorescent material that emits fluorescence when irradiated with ultraviolet rays between the volume hologram layer 2 and the heat seal layer 3. The layer 5 may be formed.

  By forming such a fluorescent light emitting layer, the volume hologram transfer foil of the present invention can be made capable of producing a volume hologram laminate having a more excellent anti-counterfeit function. In addition, the region where the volume hologram is recorded by matching the wavelength of the ultraviolet light for reproducing the volume hologram recorded in the volume hologram layer with the wavelength of the ultraviolet light for emitting fluorescence of the fluorescent material. Therefore, for example, by recording the volume hologram in a pattern, it is also possible to produce a volume hologram laminate excellent in design using the volume hologram transfer foil of the present invention. It becomes possible.

  The fluorescent light emitting layer used in the present invention contains a fluorescent material that emits fluorescence when irradiated with ultraviolet rays. The fluorescent material used in the present invention absorbs ultraviolet rays in the wavelength range of the network. If it can emit fluorescence by this, it will not specifically limit. Especially, as for the fluorescent material used for this invention, it is preferable that the wavelength of the ultraviolet-ray which light-emits fluorescence exists in the range of 100 nm-400 nm, and it is more preferable that it exists in the range of 200 nm-400 nm.

  At least one type of fluorescent material used in the present invention is used, but in the present invention, it is preferable to use a plurality of fluorescent materials having different wavelengths of emitted fluorescence, and in particular each color of red, green, and blue is used. It is preferable to use a fluorescent material that develops color. This is because the fluorescent light-emitting layer used in the present invention can be made capable of forming a full-color image with fluorescence.

Examples of the fluorescent material used in the present invention include organic fluorescent dyes and inorganic fluorescent dyes as fluorescent materials used in the present invention.
Examples of the organic fluorescent dye include, for example, diaminostilbene disulfonic acid derivatives, imidazole derivatives, coumarin derivatives, derivatives such as triazole, carbazole, pyridine, naphthalic acid, imidazolone, dyes such as fluorescein and eosin, anthracene, etc. And a compound having a benzene ring. Specifically, as visible and colorless fluorescent dyes, EB-501 (Mitsui Chemicals, Inc., emission color: blue), EG-302 (Mitsui Chemicals, emission color: yellow green), EG -307 (Mitsui Chemicals, Inc., emission color: green), ER-120 (Mitsui Chemicals, emission color: red), ER-122 (Mitsui Chemicals, emission color: red), Ubitex OB (manufactured by Ciba Specialty Chemicals Co., Ltd., emission color: blue), europium-thenoyl trifluoroacetone chelate (Sinloihi Co., Ltd., red-orange) and the like, which are called optical brighteners, can be mentioned.
As the inorganic fluorescent dye, the inorganic fluorescent dye is mainly composed of crystals such as oxides such as Ca, Ba, Mg, and Sr, sulfides, silicates, phosphates, and tungstates. , Eu, Mn, Pb, Fe, Mn, Zn, Ag, Cu, or other metal elements or rare earth elements added as a dopant can be used. Specifically, under the visible light, colorless to white G-300 series (SrAl ₂ O ₄ : Eu, Dy, manufactured by Nemoto Special Chemical, luminescent color: green) and V-300 series (CaAl ₂ O ₄ : Eu, Nd, root special) Chemical emission color: purple).

  Examples of the fluorescent material used in the present invention include thiophene fluorescent dyes, β-quinophthalone fluorescent dyes, coumarin fluorescent dyes, bisstyrylbenzene fluorescent dyes, oxazole fluorescent dyes, and europium complex fluorescent dyes. Can be mentioned. Specific examples of these fluorescent dyes include those described in JP-A No. 2004-122690.

  In addition, it is preferable that the fluorescent light emitting layer used in the present invention usually contains a binder resin in addition to the fluorescent material. Examples of the binder resin used in the present invention include cellulose resins such as ethyl cellulose, ethyl hydroxy cellulose, hydroxypropyl cellulose, methyl cellulose, and cellulose acetate; vinyls such as polyvinyl alcohol, polyvinyl acetate, polyvinyl butyral, polyvinyl acetal, and polyvinyl pyrrolidone. Examples thereof include acrylic resins, acrylic resins such as poly (meth) acrylate and poly (meth) acrylamide, polyurethane resins, polyamide resins, polyester resins, and mixtures of these resins. In the present invention, any of these resins can be suitably used.

(3) Ultraviolet absorbing layer Next, the ultraviolet absorbing layer used in the present invention will be described. The ultraviolet absorbing layer used in the present invention is used in combination when the fluorescent light emitting layer is used, and absorbs ultraviolet light capable of emitting fluorescence of the fluorescent material contained in the fluorescent light emitting layer. is there.

  A case where such an ultraviolet absorbing layer is formed on the volume hologram transfer foil of the present invention will be described with reference to the drawings. FIG. 4 is a schematic view showing an example in which an ultraviolet absorbing layer is formed on the volume hologram transfer foil of the present invention. As illustrated in FIG. 4, when the fluorescent light emitting layer 5 is used for the volume hologram transfer foil 10 ′ ″ of the present invention, it is formed in a pattern between the substrate 1 and the volume hologram layer 2. It is preferable that an ultraviolet absorbing layer 6 that absorbs ultraviolet rays capable of emitting fluorescence of the fluorescent material contained in the fluorescent light emitting layer 5 is used.

  By using such an ultraviolet absorbing layer, it is possible to prevent fluorescence from being emitted from the fluorescent light emitting layer in the region where the ultraviolet absorbing layer is formed. It is also possible to produce a volume hologram laminate excellent in design by using.

  Here, when the peelable protective layer described above is used in the volume hologram transfer foil of the present invention, the ultraviolet absorbing layer is formed between the peelable protective layer and the volume hologram layer.

  As a material used for the ultraviolet absorbing layer used in the present invention, depending on the type of fluorescent material contained in the fluorescent light emitting layer, the wavelength of the ultraviolet light absorbed when the fluorescent material emits fluorescence is the same wavelength. There is no particular limitation as long as it is an ultraviolet absorbing material that can absorb ultraviolet rays. Examples of such UV absorbing materials include organic UV absorbers, reactive UV absorbers, and inorganic UV absorbers.

  Examples of the organic ultraviolet absorber include salicylates, benzophenones, benzotriazoles, substituted acrylonitriles, nickel chelates, hindered amines, phenyl triazines, oxalic anilides, malonic esters, etc. An ultraviolet absorber is mentioned.

  Examples of the reactive ultraviolet absorber include the above organic ultraviolet absorbers, for example, an addition polymerizable double bond such as a vinyl group, an acryloyl group, and a methacryloyl group, or an alcoholic hydroxyl group, an amino group, a carboxyl group, an epoxy group, and an isocyanate. A group into which a group or the like has been introduced is reacted and fixed to a resin binder. As a method for reaction fixation, a copolymer is obtained by radical polymerization of a resin component of a conventionally known monomer, oligomer, or reactive polymer and a reactive ultraviolet absorber having an addition polymerizable double bond as described above. be able to. When the reactive ultraviolet absorber has a hydroxyl group, an amino group, a carboxyl group, an ethoxy group, or an isocyanate group, a thermoplastic resin having reactivity with the above reactive group is used, and a catalyst is used as necessary. The reactive ultraviolet absorber can be reactively fixed to the thermoplastic resin by heat or the like.

  Examples of the inorganic ultraviolet absorber include fine particles of zinc oxide, titanium oxide, cerium oxide, and iron oxide, which can be used by being dispersed in a binder in a timely manner.

(4) Others In addition to the above, as an optional configuration used in the present invention, for example, the adhesiveness between the volume hologram layer and the heat seal layer, or the adhesiveness between the volume hologram layer and the peelable protective layer is used. The primer layer used in order to improve can be mentioned. Examples of such a primer layer include polyurethane, polyester, polyvinyl chloride resin, polyvinyl acetate resin, vinyl chloride-vinyl acetate copolymer, acrylic resin, polyvinyl alcohol resin, polyvinyl acetal resin, ethylene and acetic acid. Examples include those using a copolymer with vinyl or acrylic acid, an epoxy resin, or the like.

  In the present invention, as an arbitrary configuration, a barrier layer may be formed between the volume hologram layer and the heat seal layer. Depending on the combination of the photosensitive material used for the volume hologram layer and the thermoplastic resin used for the heat seal layer, the low molecular weight component may be transferred from the volume hologram layer to other layers over time. This is because the reproduction wavelength of the volume hologram recorded on the layer may shift to the blue side (short wavelength side), but such a problem can be solved by providing a barrier layer.

  The material used for the barrier layer is not particularly limited as long as it can exhibit a desired barrier property, but a transparent organic resin material is usually used. As the transparent organic resin material used in the present invention, for example, a solvent-free trifunctional or higher functional group, preferably a hexafunctional or higher functional ionizing radiation curable epoxy-modified acrylate resin that reacts with ionizing radiation such as ultraviolet rays or electron beams, Examples include urethane-modified acrylate resins and acrylic-modified polyester resins.

5). Production Method of Volume Hologram Transfer Foil As a production method of the volume hologram transfer foil of the present invention, for example, a method of sequentially laminating a volume hologram layer and a heat seal layer on a substrate can be used. Since such a method is generally the same as a known method for producing a volume hologram transfer foil, a detailed description thereof is omitted here.

B. Volume hologram laminate Next, the volume hologram laminate of the present invention will be described. The volume hologram laminate of the present invention is a volume hologram that is formed on a transfer target, a heat seal layer that is formed on the transfer target and contains a thermoplastic resin, and is formed on the heat seal layer and reproduced by ultraviolet rays. A volume hologram layer on which is recorded.

  Such a volume hologram laminate of the present invention will be described with reference to the drawings. FIG. 5 is a schematic sectional view showing an example of the volume hologram laminate of the present invention. As illustrated in FIG. 5, the volume hologram laminate 20 of the present invention includes a transfer target 21, a heat seal layer 3 formed on the transfer target 21 and containing a thermoplastic resin, and the heat seal layer. 3 and a volume hologram layer 2 on which a volume hologram reproduced by ultraviolet rays is recorded.

According to the present invention, the volume hologram recorded in the volume hologram layer is reproduced by ultraviolet rays, so that the volume hologram can be visually recognized under normal visible light conditions such as under an indoor fluorescent lamp. Therefore, as long as the volume hologram laminate of the present invention is used under normal visible light conditions such as indoor fluorescent lamps, the presence of the volume hologram layer cannot be easily recognized from the outside. can do. For this reason, according to the present invention, it is possible to produce a volume hologram laminate in which it is difficult to know from the outside that a volume hologram is used as a forgery preventing means.
Therefore, according to the present invention, a volume hologram laminate excellent in the forgery prevention function can be obtained.

The volume hologram laminate of the present invention has at least the transfer target, a heat seal layer, and a volume hologram layer, and any other configuration may be used as necessary.
Hereafter, each structure used for the volume hologram laminated body of this invention is demonstrated in order.

  The heat seal layer and the volume hologram layer used in the present invention are the same as those described in the above section “A. Volume hologram transfer foil”, and thus the description thereof is omitted here.

1. Transfer object First, the transfer object used in the present invention will be described. The transfer medium used in the present invention is not particularly limited as long as it can be adhered to the volume hologram layer via the heat seal layer, and the use of the volume hologram laminate of the present invention is not limited. It can be arbitrarily selected according to the use. Examples of such a member to be transferred include various cards such as paper used for passports, booklets and gift certificates, ID cards, films, cloths, metals, and glass.

2. Arbitrary Configuration The volume hologram laminate of the present invention has at least the transfer target body, the volume hologram layer, and the heat seal layer, but the present invention uses any other configuration other than these as necessary. Can do. The arbitrary structure used for this invention is not specifically limited, According to the use etc. of the volume hologram laminated body of this invention, it can select suitably and can be used. Among them, as an arbitrary configuration suitably used in the present invention, a fluorescent light-emitting layer that is formed between the heat seal layer and the volume hologram layer and contains a fluorescent material that emits fluorescence when irradiated with ultraviolet rays, A peelable protective layer formed on the volume hologram layer can be mentioned. In addition, when the fluorescent light emitting layer is used, it absorbs ultraviolet rays that are further formed in a pattern on the volume hologram layer as the other configuration and can emit fluorescence of the fluorescent material. An ultraviolet absorption layer can be mentioned.
Hereinafter, each of these components will be described in order.

(1) Peelable protective layer First, the peelable protective layer will be described. The peelable protective layer is formed on the volume hologram layer.

  The case where a peelable protective layer is used in the volume hologram laminate of the present invention will be described with reference to the drawings. FIG. 6 is a schematic cross-sectional view showing an example where a peelable protective layer is used in the volume hologram laminate of the present invention. As illustrated in FIG. 6, in the volume hologram laminate 20 ′ of the present invention, the peelable protective layer 4 may be formed on the volume hologram layer 2.

  The details of the peelable protective layer used in the present invention are the same as those described in the above section “A. Volume hologram transfer foil”, and thus the description thereof is omitted here.

(2) Fluorescent Light-Emitting Layer Next, the fluorescent light-emitting layer used in the present invention will be described. The fluorescent light emitting layer used in the present invention is formed between the volume hologram layer and the heat seal layer, and contains a fluorescent material that emits fluorescence when irradiated with ultraviolet rays.

  A case where such a fluorescent light emitting layer is used in the volume hologram laminate of the present invention will be described with reference to the drawings. FIG. 7 is a schematic sectional view showing an example in which a fluorescent light emitting layer is used in the volume hologram laminate of the present invention. As illustrated in FIG. 7, the volume hologram laminate 20 ″ of the present invention has a fluorescent emission containing a fluorescent material that emits fluorescence when irradiated with ultraviolet rays between the volume hologram layer 2 and the heat seal layer 3. The layer 5 may be formed.

  By forming such a fluorescent light emitting layer, the volume hologram laminate of the present invention can be made more excellent in anti-counterfeiting function. In addition, the region where the volume hologram is recorded is obtained from the fluorescent material by matching the wavelength of the ultraviolet light for reproducing the volume hologram recorded in the volume hologram layer with the wavelength of the ultraviolet light for emitting fluorescence of the fluorescent material. Since fluorescence can be prevented from being emitted, the volume hologram laminate of the present invention can be made excellent in design by recording the volume hologram in a pattern, for example.

  The details of the fluorescent light emitting layer used in the present invention are the same as those described in the above section “A. Volume hologram transfer foil”, and thus the description thereof is omitted here.

(3) Ultraviolet absorbing layer Next, the ultraviolet absorbing layer used in the present invention will be described. The ultraviolet absorbing layer used in the present invention is used in combination when the fluorescent light emitting layer is used, and absorbs ultraviolet light capable of emitting fluorescence of the fluorescent material contained in the fluorescent light emitting layer. is there.

  A case where such an ultraviolet absorbing layer is formed on the volume hologram laminate of the present invention will be described with reference to the drawings. FIG. 8 is a schematic view showing an example in which an ultraviolet absorbing layer is formed on the volume hologram laminate of the present invention. As illustrated in FIG. 8, when the fluorescent light emitting layer 5 is used in the volume hologram laminate 20 ′ ″ of the present invention, the fluorescent light emitting layer 5 is formed in a pattern on the volume hologram layer 2. It is preferable to use an ultraviolet absorbing layer 6 that absorbs ultraviolet rays capable of emitting fluorescence of the fluorescent material contained in the fluorescent material.

  Since such an ultraviolet absorbing layer is used, it is possible to prevent fluorescence from being emitted from the fluorescent light emitting layer in the region where the ultraviolet absorbing layer is formed. Can be made more excellent in design.

  Here, when the peelable protective layer described above is used in the volume hologram laminate of the present invention, the ultraviolet absorbing layer is formed between the peelable protective layer and the volume hologram layer.

  The details of the fluorescent light emitting layer used in the present invention are the same as those described in the above section “A. Volume hologram transfer foil”, and thus the description thereof is omitted here.

(4) Others As an optional configuration used in the present invention, in addition to the above, the primer layer and the barrier layer described in the section “A. Volume hologram transfer foil” can be used.

3. Volume hologram laminate Since the volume hologram laminate of the present invention has the above-mentioned transfer target, a heat seal layer, and a volume hologram layer, in addition to various information recorded in advance on the transfer target, a volume hologram Information such as an image based on is further added.
The volume hologram laminate of the present invention will be specifically described with reference to the drawings. FIG. 10 is a schematic diagram showing a specific example of the volume hologram laminate of the present invention and the transfer target used in the present invention. As illustrated in FIG. 10 (a), as the transfer object used in the present invention, one in which all kinds of information such as face image information, character information, and graphic information are recorded in advance can be used. As illustrated in FIG. 10B, the volume hologram laminate of the present invention further records information by transferring the volume hologram transfer foil to the transfer target illustrated in FIG. 10A. It becomes a thing.
FIG. 11 is a schematic view showing an example in which an ultraviolet absorbing layer is used in the volume hologram laminate of the present invention. As illustrated in FIG. 11, when an ultraviolet absorbing layer is used in the volume hologram laminate of the present invention, the ultraviolet absorbing layer is formed so that the ultraviolet absorbing layer does not overlap with the fluorescent light emitting layer image.

4). Production Method of Volume Hologram Laminate The volume hologram laminate of the present invention can be produced by a generally known method. As a specific example of the method for producing the volume hologram laminate of the present invention, for example, the volume hologram transfer foil according to the present invention is used, and the transfer object is bonded to the heat seal layer of the volume hologram transfer foil. The method which consists of an adhesion | attachment process and the base material peeling process which peels the base material of the said volume hologram transfer foil can be mentioned.

  A method for manufacturing such a volume hologram laminate will be described with reference to the drawings. FIG. 9 is a schematic view showing an example of the method for producing a volume hologram laminate of the present invention. As illustrated in FIG. 9, the volume hologram laminate of the present embodiment uses the volume hologram transfer foil 10 according to the present invention (FIG. 9A), and the heat seal layer of the volume hologram transfer foil 10. 3 to be transferred member bonding step (FIG. 9B) for bonding the transfer member 21 onto 3, and a substrate peeling step for peeling the substrate 1 of the volume hologram transfer foil 10 (FIG. 9C), It is characterized by having.

  The method for adhering the transfer object onto the heat seal layer in the transfer object adhering step is not particularly limited as long as the heat seal layer can be adhered to a predetermined position of the transfer object. Usually, a method of adhering the transfer object by heating the heat seal layer is used. The means for heating the heat seal layer in this step is not particularly limited as long as only a desired region can be heated to a predetermined temperature. Examples of the method include a method using a heating roller, a hot press, a hot stamp, and the like. Any of these heating means can be suitably used in this step.

  In addition, the method for peeling the substrate in the substrate peeling step is not particularly limited as long as the method can peel the substrate only in the region bonded to the transfer target. Usually, a method is used in which the volume hologram transfer foil is peeled off by physically separating it from the transfer target.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical scope of the invention.

1. Example 1
(First laminate)
A PET film (trade name Lumirror T60 (50 μm): manufactured by Toray Industries, Inc.) is prepared as a first film, and a volume hologram recording material having the following composition is gravure as a hologram forming material so as to have a dry film thickness of 10 μm. Coating was performed with a coat, and a surface release treatment PET film (trade name: SP-PET (50 μm), manufactured by Tosero Co., Ltd.) was laminated on the coated surface to prepare a first laminate.

<Composition of volume hologram recording material>
Binder resin (methyl methacrylate copolymer) 35 parts by weight Binder resin (polyvinyl acetate resin) 20 parts by weight Hexaarylbisimidazole derivative 6 parts by weight 2-phenoxyethyl acrylate 37 parts by weight Solvent (methyl ethyl ketone / methanol = 1/1) 200 parts by weight

(Volume hologram recording)
First film / layer of volume hologram recording material / surface release treatment A laminate of PET film was recorded by recording a volume hologram using a laser beam having a wavelength of 363.8 nm (using Coherent's InnovaSaber). . After recording, the laminate was heated in an atmosphere of 100 ° C. for 50 minutes.

(Coating of heat seal layer)
From the first film / volume hologram layer / surface release-treated PET film prepared above, a material having the following composition was formed on the volume hologram layer that was exposed by peeling the surface release-treated PET film, It was coated with a gravure coat so as to be 4 μm, and a surface release treatment PET film (trade name: SP-PET (50 μm), manufactured by Tosero Co., Ltd.) was laminated on the coated surface to prepare a transfer foil.

<Composition of heat seal layer forming material>
・ Polyester resin (trade name: Byron 550, manufactured by TOYOBO, Tg: −15 ° C., molecular weight 28000) 20 parts by weight. Solvent (methyl ethyl ketone / toluene = 1/1 (weight ratio)) 80 parts by weight

2. Example 2
(Formation of fluorescent light emitting layer)
The volume hologram was recorded in the same manner as in Example 1 until recording. Next, from the first film / volume hologram layer / surface release-treated PET film, a material having the following composition was formed on the volume hologram layer exposed by peeling the surface release-treated PET film to a dry film thickness of 4 μm. It was coated with a gravure coat so that

<Composition of fluorescent light emitting layer forming material>
-Organic blue fluorescent agent (trade name: Ubitex OB, manufactured by Ciba Specialty Chemicals): 1 part by weight-Vinyl chloride-vinyl acetate copolymer resin solution (# 1000 AKT, manufactured by Denki Kagaku Kogyo Co., Ltd.): 100 parts by weight

  The heat seal layer forming material of Example 1 was formed in the same manner as in Example 1 on the fluorescent light emitting layer of the film prepared above, and a transfer foil was prepared.

3. Example 3
(Substrate / peelable protective layer / ultraviolet absorption layer second laminate)
A PET film (trade name Lumirror T60 (50 μm): manufactured by Toray Industries, Inc.) was prepared as a second film, and a peelable protective layer having the following composition was applied with a gravure coat so as to have a dry film thickness of 1 μm. On top of this, a UV absorbing layer was applied in a pattern by gravure coating so as to have a dry film thickness of 1 μm.

<Composition of material for forming peelable protective layer>
Polyethylene methacrylate resin (molecular weight: 1,000,000) 97 parts by weight Polyethylene wax (molecular weight: 10,000, average particle size: 5 μm) 3 parts by weight Solvent (methyl ethyl ketone / toluene = 1/1 (weight ratio)) 400 parts by weight <Composition of UV absorbing layer forming material>
・ Polymethyl methacrylate resin (molecular weight; 1,000,000) 97 parts by weight ・ Polyethylene wax (molecular weight: 10,000, average particle size: 5 μm) 3 parts by weight ・ Benzophenone-modified polymethyl methacrylate 15 parts by weight ・ Solvent (methyl ethyl ketone / toluene = 1 / 1 (weight ratio)) 400 parts by weight

  Moreover, it produced similarly to Example 1 until recording of the volume hologram. Next, the surface release-treated PET film is peeled and overlapped with the volume hologram recording material layer exposed so that the second film / peelable protective layer / ultraviolet absorption layer surface side of the ultraviolet absorption layer is in contact with the nip. The laminate of the first film / volume hologram layer / ultraviolet ray absorbing layer / peelable protective layer / second film was obtained by passing between the heated roller pair at 80 ° C. After recording, the laminate was heated in an atmosphere of 100 ° C. for 50 minutes.

(Formation of fluorescent light emitting layer)
Fluorescent light emitting layer formation of Example 2 on the layer of volume hologram which peeled and exposed the 1st film from 1st film / volume hologram layer / ultraviolet absorption layer / peelable protective layer / second film The material was applied by gravure coating so that the dry film thickness was 4 μm.

(Coating of heat seal layer)
On the fluorescent light emitting layer of the fluorescent light emitting layer / volume hologram layer / ultraviolet ray absorbing layer / peelable protective layer / second film prepared above, the heat seal layer forming material described in Example 1 was formed with a dry film thickness of 4 μm. In this way, a gravure coat was applied, and a surface release treatment PET film (trade name: SP-PET (50 μm) manufactured by Tosero Co., Ltd.) was laminated on the coated surface to prepare a transfer foil.

4). Example 4
The volume hologram laminate of Examples 1 to 3 was transferred to a gift certificate using a hot stamp machine manufactured by Navitas Co., Ltd. at a transfer temperature of 150 ° C. and a pressure of 0.8 Mpa, and the first film was peeled off to peel off the volume hologram laminate. Got the body.

5). Example 5
The volume hologram laminate of Examples 1 to 3 was transferred onto a polyvinyl chloride card on which face information and character information had been transferred in advance by sublimation transfer, using a hot stamping machine manufactured by Navitas Co., Ltd., a transfer temperature of 150 ° C., and a pressure of 0.8 Mpa. Then, the first film was peeled off to obtain a volume hologram laminate.

It is a schematic sectional drawing which shows an example of the volume hologram transfer foil of this invention. It is a schematic sectional drawing which shows the other example of the volume hologram transfer foil of this invention. It is a schematic sectional drawing which shows the other example of the volume hologram transfer foil of this invention. It is a schematic sectional drawing which shows the other example of the volume hologram transfer foil of this invention. It is a schematic sectional drawing which shows an example of the volume hologram laminated body of this invention. It is a schematic sectional drawing which shows the other example of the volume hologram laminated body of this invention. It is a schematic sectional drawing which shows the other example of the volume hologram laminated body of this invention. It is a schematic sectional drawing which shows the other example of the volume hologram laminated body of this invention. It is a schematic sectional drawing which shows an example of the manufacturing method of the volume hologram laminated body of this invention. It is the schematic which shows the specific example of the to-be-transferred body used for this invention, and the volume hologram laminated body of this invention. It is the schematic which shows the specific example of the volume hologram laminated body of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Base material 2 ... Volume hologram layer 3 ... Heat seal layer 4 ... Peelable protective layer 5 ... Fluorescence emission layer 6 ... Ultraviolet absorption layer 10, 10 ', 10'',10''' ... Volume hologram transfer foil 20, 20 ', 20'',20''' ... Volume hologram laminate 21 ... Transferee

Claims (6)

  A substrate, a volume hologram layer on which a volume hologram reproduced by ultraviolet rays is recorded, and a heat seal layer formed on the volume hologram layer and containing a thermoplastic resin. Volume hologram transfer foil characterized by   The fluorescent light-emitting layer containing a fluorescent material that emits fluorescence when irradiated with ultraviolet rays is formed between the volume hologram layer and the heat seal layer. Volume hologram transfer foil.   The ultraviolet absorbing layer that absorbs ultraviolet rays capable of emitting fluorescence of the fluorescent material is formed in a pattern between the base material and the volume hologram layer. The volume hologram transfer foil described in 1.   The volume hologram transfer foil according to claim 1, wherein a peelable protective layer is formed between the volume hologram layer and the substrate.   The volume hologram transfer foil according to claim 3, wherein a peelable protective layer is formed between the ultraviolet absorbing layer and the substrate.   A transferred body, a heat seal layer formed on the transferred body and containing a thermoplastic resin, a volume hologram layer formed on the heat seal layer and recorded with a volume hologram reproduced by ultraviolet rays, A volume hologram laminate, comprising:

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