JP5779854B2 - Volume hologram layer forming composition, volume hologram laminate, and volume hologram layer transfer foil - Google Patents

Description

  The present invention relates to a volume hologram layer forming composition used for forming a volume hologram layer on which a volume hologram is recorded, and a volume hologram having a volume hologram layer created using the volume hologram layer forming composition The present invention relates to a laminate and a volume hologram layer transfer foil.

  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 difficulty in copying. 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 according to 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 interference fringes generated by light interference being drawn three-dimensionally in the thickness direction as fringes having different refractive indexes. Among these, since the volume hologram is a hologram image recorded by the difference in the refractive index of the material, it has the advantage that it is difficult to replicate compared to the relief hologram. Use as anti-counterfeiting means is expected.

  Further, in the case of using a hologram as a design imparting or counterfeiting prevention means, various methods are known as a method for imparting a hologram to securities, cards, etc. depending on the object to which the hologram is imparted. As such a method, for example, a method of weaving a slit-shaped hologram or a method of embedding the hologram in a medium so that it can be visually recognized from the outside is known. Method is used. Among them, as a simpler method, a method of sticking a hologram at a predetermined position by transferring a hologram from a hologram layer transfer foil in which a hologram is formed on an arbitrary base material has been widely used.

  Here, a plurality of materials having different refractive indexes are generally used for the volume hologram, and usually a photopolymerizable material that can be polymerized by irradiation with specific light is used. . For this reason, it is known that the hologram layer in which the volume hologram is recorded tends to have high mechanical strength. Further, the volume hologram has a property that a hologram image is recorded by three-dimensionally arranging the refractive index difference, so that the thickness of the layer on which the hologram is formed is thicker than that of the relief hologram. There is a tendency. For this reason, the volume hologram layer has poor foil cutting properties. When the method of transferring the hologram layer using the hologram layer transfer foil described above is used, if the volume hologram layer is transferred in a predetermined shape, burrs or the like are formed at the end. There have been problems such as the occurrence of a transfer defect due to the occurrence of the above.

  Under such circumstances, Patent Documents 1 and 2 disclose that the hologram layer transfer foil described above is also used for volume holograms by adjusting the elongation at break and the breaking strength of the hologram layer on which the volume hologram is recorded. An example in which the used transfer method can be used is disclosed. However, in order to record a holographic image clearly, recording a clear holographic image and adjusting the elongation at break and rupture strength to predetermined values due to the limited materials that can be used. There is a problem that it is difficult to achieve both.

  Patent Documents 3 and 4 disclose techniques for improving the foil breakability of a hologram layer by forming a cut portion in the entire width of the hologram layer. The technique for forming such a cut portion can be said to be one of effective means for improving transfer defects when the hologram layer is transferred over the entire width. However, when only a part of the hologram layer is transferred in a spot manner, there is a problem that it is difficult to use means for forming such a cut portion.

Japanese Patent Laid-Open No. 3-46687 Japanese Patent Laying-Open No. 2005-070064 JP 2009-274428 A JP 2009-9105 A

  The present invention has been made in view of the above-mentioned problems, and has as its main object to provide a composition for forming a volume hologram layer capable of forming a volume hologram layer having excellent foil cutting properties. It is.

  In order to solve the above-described problems, the present invention forms a volume hologram layer in which a volume hologram is recorded, containing a cationic polymerizable compound having a cationic polymerizable functional group and a radical polymerizable compound having a radical polymerizable functional group. A composition for forming a volume hologram layer for use in order to reduce the breaking strength of the volume hologram layer and contains a cationically polymerizable functional material having a cationically polymerizable functional group A composition for forming a volume hologram layer is provided.

  According to the composition for forming a volume hologram layer of the present invention, in addition to the cationic polymerizable compound and the radical polymerizable compound, the breaking strength of the volume hologram layer can be reduced, and the cationic polymerizable functional group is added. By containing the cation polymerizable functional material having, a volume hologram layer having a low breaking strength and excellent foil breakability can be formed.

  In the volume hologram layer forming composition of the present invention, the cationic polymerizable functional material is preferably a monofunctional compound having a single cationic polymerizable functional group in the molecule. Thereby, in the volume hologram layer formed using the volume hologram layer forming composition of the present invention, the crosslinking density can be lowered, and a volume hologram layer having a lower rupture strength and an excellent foil breakability is formed. Because it can.

  The present invention also provides a volume hologram laminate comprising a cationically polymerizable compound having a cationically polymerizable functional group and a polymer of a radically polymerizable compound having a radically polymerizable functional group and having a volume hologram layer on which a volume hologram is recorded. The volume hologram layer includes a polymer of a cation polymerizable functional material having a cation polymerizable functional group that can reduce the breaking strength of the volume hologram layer. A volume hologram laminate is provided.

  According to the volume hologram laminate of the present invention, the volume hologram layer contains a cationic polymerizable compound having a cationic polymerizable functional group, and a polymer of a radical polymerizable compound having a radical polymerizable functional group, and The breaking strength of the volume hologram layer can be reduced, and the judgment strength of the volume hologram layer can be reduced by containing a polymer of a cationic polymerizable functional material having a cationic polymerizable functional group. For this reason, according to this invention, the volume hologram laminated body excellent in foil tearing property can be obtained.

  Furthermore, the present invention provides a base material, a peelable protective layer formed on the base material, a cationic polymerizable compound having a cationic polymerizable functional group, and a radical polymerizable functional group formed on the peelable protective layer. A volume hologram layer comprising a polymer of a radically polymerizable compound having a group and having a volume hologram recorded thereon, and a heat seal layer formed on the volume hologram layer and containing a thermoplastic resin A transfer foil, wherein the volume hologram layer includes a polymer of a cationic polymerizable functional material that can reduce the breaking strength of the volume hologram layer and has a cationic polymerizable functional group. A volume hologram layer transfer foil is provided.

  According to the volume hologram layer transfer foil of the present invention, the volume hologram layer contains a cationic polymerizable compound having a cationic polymerizable functional group, and a polymer of a radical polymerizable compound having a radical polymerizable functional group, The breaking strength of the volume hologram layer can be lowered, and the judgment strength of the volume hologram layer can be lowered by containing a polymer of a cationic polymerizable functional material having a cationic polymerizable functional group. Therefore, according to the present invention, it is possible to obtain a volume hologram layer transfer foil having excellent foil cutting properties.

  The composition for forming a volume hologram layer of the present invention has an effect that a volume hologram layer having excellent foil cutting properties can be formed. In addition, the volume hologram laminate and the volume hologram layer transfer foil of the present invention have an effect of being excellent in foil cutting properties.

It is a schematic sectional drawing which shows an example of the volume hologram layer transfer foil of this invention. It is a schematic sectional drawing which shows the other example of the volume hologram layer transfer foil of this invention.

The present invention relates to a volume hologram layer forming composition, a volume hologram laminate, and a volume hologram layer transfer foil.
Hereinafter, these inventions will be described in order.

A. First, the volume hologram layer forming composition of the present invention will be described. As described above, the volume hologram layer forming composition of the present invention is used to form a volume hologram layer in which a volume hologram is recorded, and includes a cationically polymerizable compound having a cationically polymerizable functional group, and It contains a radical polymerizable compound having a radical polymerizable functional group, and further comprises a cationic polymerizable functional material having a cationic polymerizable functional group, which can reduce the breaking strength of the volume hologram layer. To do.

  According to the composition for forming a volume hologram layer of the present invention, in addition to the cationic polymerizable compound and the radical polymerizable compound, the breaking strength of the volume hologram layer can be reduced, and the cationic polymerizable functional group is added. By containing the cation polymerizable functional material having, a volume hologram layer having a low breaking strength and excellent foil breakability can be formed.

The composition for forming a volume hologram layer of the present invention contains at least the above cationic polymerizable functional material, cationic polymerizable compound, and radical polymerizable compound, and may have other configurations as necessary. Is.
Hereinafter, each structure used for the composition for volume hologram layer formation of this invention is demonstrated in order.

1. Cationic polymerizable functional material The cationic polymerizable functional material used in the present invention will be described. The cationic polymerizable functional material used in the present invention has a cationic polymerizable functional group, and when the volume hologram layer is formed using the volume hologram layer forming composition of the present invention, the breaking strength of the volume hologram layer Can be reduced. That is, the cationically polymerizable functional material used in the present invention has a function of lowering the breaking strength of the volume hologram layer when it contains a cationically polymerizable functional group and the inclusion thereof does not contain it. It is.

  The cationic polymerizable functional material used in the present invention is particularly limited as long as it has a cationic polymerizable functional group and has a function capable of reducing the breaking strength of the volume hologram layer described above. It is not a thing. The cationic polymerizable functional group possessed by the cationic polymerizable functional material used in the present invention is not particularly limited, but is the same cationic polymerizable functional group as the cationic polymerizable functional group possessed by the cationic polymerizable compound described below. Preferably there is. In addition, since the cationically polymerizable functional material used in the present invention has a function capable of reducing the breaking strength of the volume hologram layer described above, it is usually a different kind from the cationically polymerizable compound described later. Become a material.

  In addition, the cationic polymerizable functional material used in the present invention has a single cationic polymerizable functional group in the molecule as long as it has a function capable of reducing the breaking strength of the volume hologram layer described above. It may be a functional compound, or may be another functional compound having a plurality of cationically polymerizable functional groups in the molecule. Among these, the cationically polymerizable functional material used in the present invention is preferably a monofunctional compound. Since the monofunctional compound is used as the cationic polymerizable functional material, the crosslinking density of the volume hologram layer formed by using the composition for forming a volume hologram layer of the present invention can be reduced. This is because it is possible to form a volume hologram layer that is low and has excellent foil cutting properties.

Furthermore, the cationically polymerizable functional material used in the present invention preferably has a large molecular weight per unit cationically polymerizable functional group. Thereby, the foil cutting property of the volume hologram layer formed using the volume hologram layer forming composition of the present invention can be further improved.
Here, what is preferred as the molecular weight per unit cationically polymerizable functional group is appropriately determined according to the kind of the cationically polymerizable functional group.

  Examples of the cationic polymerizable functional material used in the present invention include, for example, those in which the cationic polymerizable functional group is a glycidyl group, alkyl monoglycidyl ether, allyl glycidyl ether, phenyl glycidyl ether, 2-ethylhexyl glycidyl ether, decyl. Examples thereof include glycidyl ether, p-tert-butylphenyl glycidyl ether, n-butyl glycidyl ether, p-sec-butylphenyl glycidyl ether, and stearyl glycidyl ether. Further, as the cationically polymerizable functional group having an oxetanyl group, 2-ethylhexyloxetane, 3-ethyl-3- (hydroxymethyl) oxetane, 3-ethyl-3-[(phenoxy) methyl] oxetane, 3-ethyl- Although 3- (chloromethyl) oxetane etc. are mentioned, it is not limited to this.

  In addition, the cationically polymerizable functional material used in the present invention may be only one type or two or more types.

  The content of the cationic polymerizable functional material in the volume hologram layer forming composition of the present invention is desired depending on the use of the volume hologram layer formed using the volume hologram layer forming composition of the present invention. There is no particular limitation as long as it is within a range in which a volume hologram layer exhibiting a breaking strength can be formed. The specific content is appropriately determined according to the type of the cationic polymerizable functional material, the cationic polymerizable compound described later, the type of the radical polymerizable compound, and the like, and is not particularly limited. Usually, it is preferably in the range of 0.1% by mass to 30% by mass, and more preferably 1% by mass to 10% by mass with respect to the total volume hologram layer forming composition excluding the solvent component. It is more preferable to be within the range. When the content of the cationic polymerizable functional material is larger than the above range, it is difficult to record a clear volume hologram image when forming the volume hologram layer using the volume hologram layer forming composition of the present invention. This is because there is a case. On the other hand, if the content is less than the above range, the breaking strength of the volume hologram layer formed using the volume hologram layer forming composition of the present invention cannot be sufficiently lowered, and the foil breakage is insufficient. This is because a large volume hologram layer may be formed.

2. Cationic polymerizable compound Next, the cationic polymerizable compound used in the present invention will be described. The cationically polymerizable compound used in the present invention is particularly limited as long as it has a cationically polymerizable functional group and can record a volume hologram layer when used in combination with a radically polymerizable compound described later. It is not a thing. Among these, the cationically polymerizable compound used in the present invention is preferably a liquid compound at room temperature because the polymerization of the radically polymerizable compound is preferably performed in a composition having a relatively low viscosity.

  Examples of the cationically polymerizable compound used in the present invention include cyclic ethers represented by epoxy rings and oxetane rings, thioethers, and vinyl ethers. Specific examples include an epoxy ring-containing compound. Examples of such cationically polymerizable compounds include, for example, diglycerol diether, pentaerythritol polydiglycidyl ether, 1,4-bis (2,3-epoxypropoxyperfluoroisopropyl) cyclohexane, sorbitol polyglycidyl ether, 1, 6-hexanediol glycidyl ether, polyethylene glycol diglycidyl ether, phenyl glycidyl ether, polyalkylene glycol diglycidyl ether, bisphenol A diglycidyl ether, glycerin triglycidyl ether, diglycerol triglycidyl ether, diglycidyl hexahydrophthalate, trimethylolpropane Diglycidyl ether, allyl glycidyl ether, cyclohexene oxide, etc. can be exemplified But it is not limited thereto.

  In addition, the cationically polymerizable compound used in the present invention may be only one type or two or more types.

  The content of the cationic polymerizable compound in the composition for forming a volume hologram layer of the present invention is particularly limited as long as the volume hologram can be recorded by using in combination with a radical polymerizable compound described later. Is not to be done. The specific content is appropriately determined according to the type of the cationically polymerizable compound and the radically polymerizable compound described later, and is not particularly limited. It is preferable that it is in the range of 3 mass%-60 mass% with respect to what remove | excluded the solvent component from the composition for the whole, More preferably, it exists in the range of 10 mass%-50 mass%.

3. Next, the radically polymerizable compound used in the present invention will be described. The radically polymerizable compound used in the present invention is not particularly limited as long as it has a radically polymerizable functional group and can be used in combination with the above-described cationically polymerizable compound to record a volume hologram layer. It is not something. Among them, the radically polymerizable compound used in the present invention is preferably one having at least one ethylenically unsaturated double bond in the molecule. 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 compounds having at least one addition-polymerizable ethylenically unsaturated double bond, such as unsaturated carboxylic acids and salts thereof, unsaturated carboxylic acids and aliphatic polyvalent compounds. Examples include esters with polyhydric alcohol compounds and amide bonds of unsaturated carboxylic acids and aliphatic polyvalent amine compounds. Specific examples include an ester monomer of an aliphatic polyhydric alcohol compound and an unsaturated carboxylic acid. More specifically, as the acrylic ester, ethylene glycol diacrylate, triethylene glycol diacrylate, 1,3-butanediol diacrylate, tetramethylene glycol diacrylate, propylene glycol diacrylate, neopentyl glycol diacrylate, trimethylol Propane triacrylate, trimethylolpropane tri (acryloyloxypropyl) ether, trimethylol ethane triacrylate, hexanediol diacrylate, 1,4-cyclohexanediol diacrylate, tetraethylene glycol diacrylate, pentaerythritol diacrylate, pentaerythritol triacrylate , Pentaerythritol tetraacrylate, dipentaerythritol diacrylate Acrylate, dipentaerythritol triacrylate, dipentaerythritol tetraacrylate, dipentaerythritol hexaacrylate, sorbitol triacrylate, sorbitol tetraacrylate, sorbitol pentaacrylate, sorbitol hexaacrylate, tri (acryloyloxyethyl) isocyanurate, polyester acrylate oligomer, 2 -Phenoxyethyl acrylate, 2-phenoxyethyl acrylate, phenol ethoxylate monoacrylate, 2- (p-chlorophenoxy) ethyl acrylate, p-chlorophenyl acrylate, phenyl acrylate, 2-phenylethyl acrylate, bisphenol A (2-acryloxy Ethyl) ether, ethoxylated Sphenol A diacrylate, 2- (1-naphthyloxy) ethyl acrylate, o-biphenyl acrylate, o-biphenyl acrylate, diphenoxyethanol fluorene acrylate, 9,9-bis (4-acryloxydiethoxyphenyl) fluorene, 9 , 9-bis (4-acryloxytriethoxyphenyl) fluorene, 9,9-bis (4-acryloxydipropoxyphenyl) fluorene, 9,9-bis (4-acryloxyethoxy-3-methylphenyl) fluorene, Examples include 9,9-bis (4-acryloxyethoxy-3-ethylphenyl) fluorene and 9,9-bis (4-acryloxyethoxy-3,5-dimethyl) fluorene. In addition, a sulfur-containing acrylic compound disclosed in JP-A-61-72748 can also be used. For example, 4,4′-bis (β-acryloyloxyethylthio) diphenylsulfone, 4,4 ′ -Bis (β-acryloyloxyethylthio) diphenyl ketone, 4,4′-bis (β-acryloyloxyethylthio) -3,3 ′, 5,5′-tetrabromodiphenyl ketone, 2,4-bis (β -Acryloyloxyethylthio) diphenyl ketone, but is not limited thereto. Further, examples of the methacrylic acid ester include compounds in which “acrylate” becomes “methacrylate”, “acryloxy” becomes “methacryloxy”, and “acryloyl” becomes “methacryloyl” among the above acrylate compound names.

  In addition, the radically polymerizable compound used in the present invention may be only one type or two or more types.

  The content of the radical polymerizable compound in the composition for forming a volume hologram layer of the present invention is particularly limited as long as the volume hologram can be recorded by using it together with the above-described cationic polymerizable compound. Is not to be done. The specific content is appropriately determined according to the radical polymerizable compound and the type of the cationic polymerizable compound described above, and is not particularly limited. It is preferable that it is in the range of 3 mass%-60 mass% with respect to what remove | excluded the solvent component from the composition for the whole, More preferably, it exists in the range of 10 mass%-50 mass%.

4). Other compounds In the composition for volume hologram layer formation of this invention, other compounds other than the said cation polymerizable functional material, a cation polymerizable compound, and a radical polymerizable compound may be contained as needed. The other compound used in the present invention is not particularly limited as long as it does not inhibit the effect of the composition for forming a volume hologram layer of the present invention, and a compound having an arbitrary function is appropriately selected and used. Can do. In particular, in the present invention, it is preferable that a photoradical polymerization initiator system and a photocationic polymerization initiator system are usually used as the other compound. By using the radical photopolymerization initiator system and the cationic photopolymerization initiator system, the volume hologram layer on which the volume hologram is recorded is formed using the volume hologram layer forming composition of the present invention. This is because it becomes easy to polymerize the cationic polymerizable compound and the radical polymerizable compound.

  As the photo radical polymerization initiator system, when the volume hologram layer on which the volume hologram is recorded is formed using the volume hologram layer forming composition of the present invention, an active radical is generated by first exposure, The active radical is not particularly limited as long as it can polymerize a radical polymerizable compound. Moreover, you may use combining the sensitizer which is a component which generally absorbs light, an active radical generating compound, and an acid generating compound. In the case of producing volume holograms for applications where transparency is required, sensitizers in such radical photopolymerization initiator systems often use colored compounds such as dyes to absorb visible laser light. For this, it is preferable to use a sensitizing dye that becomes transparent by being decomposed or structurally changed by a post-process after hologram recording, or by a post-treatment such as heating or ultraviolet irradiation. Examples of the dye that can be made transparent in the post-process or post-treatment include cyanine dyes, merocyanine dyes, coumarin dyes, ketocoumarin dyes, and cyclopentanone dyes. Here, “transparent” means that the region other than the hologram recording portion is visually transparent, or that the transmittance in the visible region (wavelength 400 to 700 nm) is 60% or more.

  Examples of the active radical generating compound include diaryliodonium salts and 2,4,6-substituted-1,3,5-triazines. The use of diaryliodonium salts is particularly preferred when high photosensitivity is required. Specific examples of the diaryl iodonium salts include diphenyl iodonium, 4,4′-dichlorodiphenyl iodonium, 4,4′-dimethoxydiphenyl iodonium, 4,4′-ditertiary butyl diphenyl iodonium, 3,3′-dinitrodiphenyl iodonium. Such as chloride, bromide, tetrafluoroborate, hexafluorophosphate, hexafluoroarsenate, hexafluoroantimonate, trifluoromethanesulfonate, 9,10-dimethoxyanthracene-2-sulfonate, and the like. Specific examples of 2,4,6-substituted-1,3,5-triazines include 2-methyl-4,6-bis (trichloromethyl) -1,3,5-triazine, 2,4,6 -Tris (trichloromethyl) -1,3,5-triazine, 2-phenyl-4,6-bis (trichloromethyl) -1,3,5-triazine, 2,4-bis (trichloromethyl) -6- ( p-methoxyphenylvinyl) -1,3,5-triazine, 2- (4′-methoxy-1′-naphthyl) -4,6-bis (trichloromethyl) -1,3,5-triazine and the like. .

  As the cationic photopolymerization initiator system, when the volume hologram layer on which the volume hologram is recorded is formed using the volume hologram layer forming composition of the present invention, the first exposure is performed when the volume hologram is recorded. Initiator systems that are low in photosensitivity, sensitize to post-exposure after irradiation with light having a wavelength different from that of the first exposure, generate Bronsted acid or Lewis acid, and polymerize a cationically polymerizable compound. There is no particular limitation. 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. Examples of such a cationic photopolymerization initiator system include diaryliodonium salts, triarylsulfonium salts, iron allene complexes, and the like. Preferable diaryliodonium salts include iodonium tetrafluoroborate, hexafluorophosphate, hexafluoroarsenate, hexafluoroantimonate and the like shown in the radical photopolymerization initiator system described above. Preferable triarylsulfonium salts include triphenylsulfonium, 4-tertiarybutyltriphenylsulfonium, and the like.

  In the invention, in addition to the photo radical polymerization initiator system and the photo cation polymerization initiator system, the other resin may include a binder resin, a thermal polymerization inhibitor, a silane coupling agent, a plasticizer, and a coloring agent as necessary. You may use charges together. 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.

5. Volume hologram layer forming composition The volume hologram layer forming composition of the present invention is used for forming a volume hologram layer in which a volume hologram is recorded. Since the composition for forming a volume hologram layer of the present invention contains a cationically polymerizable compound and a radically polymerizable compound, usually, a photoradical polymerization initiator system and a photocationic polymerization initiator system are used in combination. After irradiating light such as laser light that the polymerization initiator system sensitizes to polymerize the radical polymerizable compound, then irradiates light having a wavelength different from that of the laser light that the photocationic polymerization initiator system sensitizes By doing so, a volume hologram layer in which a volume hologram is recorded by a method of polymerizing a cationically polymerizable compound is formed.

B. Volume hologram laminate Next, the volume hologram laminate of the present invention will be described. The volume hologram laminate of the present invention comprises a cationically polymerizable compound having a cationically polymerizable functional group and a polymer of a radically polymerizable compound having a radically polymerizable functional group, and a volume hologram layer on which the volume hologram is recorded. The volume hologram layer includes a polymer of a cationic polymerizable functional material that can reduce the breaking strength of the volume hologram layer and has a cationic polymerizable functional group. Is.

  According to the volume hologram laminate of the present invention, the volume hologram layer contains a cationic polymerizable compound having a cationic polymerizable functional group, and a polymer of a radical polymerizable compound having a radical polymerizable functional group, and The breaking strength of the volume hologram layer can be reduced, and the judgment strength of the volume hologram layer can be reduced by containing a polymer of a cationic polymerizable functional material having a cationic polymerizable functional group. For this reason, according to this invention, the volume hologram laminated body excellent in foil tearing property can be obtained.

The volume hologram laminate of the present invention is characterized by having the volume hologram layer, and can have any configuration except that it has the volume hologram layer.
Hereinafter, such a volume hologram laminate will be described in detail.

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 contains a cationically polymerizable compound having a cationically polymerizable functional group and a polymer of a radically polymerizable compound having a radically polymerizable functional group, on which a volume hologram is recorded. . The volume hologram layer used in the present invention includes a polymer of a cationic polymerizable functional material having a cationic polymerizable functional group, which can reduce the breaking strength of the volume hologram layer. Is. By containing such a polymer of the cationic polymerizable functional material, the breaking strength of the volume hologram layer used in the present invention can be lowered, and as a result, a volume hologram laminate excellent in foil breakability can be obtained. Can do it.

  The volume hologram layer used in the present invention contains a polymer of the above cationic polymerizable functional material, cationic polymerizable compound, and radical polymerizable compound. Here, “cationic polymerizable functional material”, “cationic polymerizable compound”, and “radical polymerizable compound” are the same as those described in the section of “A. Composition for forming volume hologram layer” above. Therefore, the description here is omitted.

  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 layer can be formed, and can be appropriately adjusted according to the type of the constituent material described above. it can. 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 more preferably in the range of 3 μm to 25 μm. In the present invention, since the volume hologram layer contains the polymer of the cationic polymerizable functional material, it is possible to obtain a volume hologram layer having good foil breakability regardless of the thickness.

  In the volume hologram layer used in the present invention, the volume hologram layer contains other compounds as required in addition to the cationic polymerizable functional material, the cationic polymerizable compound, and the polymer of the radical polymerizable compound. It may be. As such other compounds, the same compounds as those described in the above section “A. Composition for forming volume hologram layer” can be used.

  The volume hologram layer used in the present invention can be formed by using the volume hologram layer forming composition of the present invention described above. That is, as described above, the volume hologram layer forming composition of the present invention contains a cationic polymerizable functional material, a cationic polymerizable compound, and a radical polymerizable compound. A volume hologram layer used in the present invention can be formed by appropriately polymerizing a cationically polymerizable functional material, a cationically polymerizable compound, and a radically polymerizable compound and recording a volume hologram.

2. Volume hologram laminate The volume hologram laminate of the present invention has the volume hologram layer described above, and can have any configuration except that the volume hologram layer is included. Specific examples of the volume hologram laminate of the present invention include a base film and a volume hologram layer, a hologram film, a hologram label provided with an adhesive layer on the hologram film, a hologram thread obtained by cutting the hologram film into a narrow width, Hologram anti-counterfeit paper with hologram threads, hologram card with hologram film embedded in card, hologram weave name, base material (paper) with hologram film affixed to cloth via adhesive layer Hologram paper label provided with volume hologram layer and adhesive layer, hologram transfer foil provided with base film, peelable protective layer, volume hologram layer and adhesive layer (heat seal layer), Transferred to bankbook, paper, film, etc. and the base film was removed Protective layer, the volume hologram layer of the present invention, the adhesive layer, and the like as the layer structure of the transfer member.

  The volume hologram laminate of the present invention uses, for example, the volume hologram layer transfer foil of the present invention described in detail in the section “C. Volume hologram layer transfer foil” described later. It can be manufactured by transferring the volume hologram layer to a transfer body.

C. Volume Hologram Layer Transfer Foil Next, the volume hologram layer transfer foil used in the present invention will be described. As described above, the volume hologram layer transfer foil of the present invention includes a base material, a peelable protective layer formed on the base material, and a cation having a cationically polymerizable functional group formed on the peelable protective layer. A volume hologram layer containing a polymerizable compound and a polymer of a radical polymerizable compound having a radical polymerizable functional group, in which a volume hologram is recorded, and a heat formed on the volume hologram layer and containing a thermoplastic resin The volume hologram layer includes a polymer of a cation polymerizable functional material having a cation polymerizable functional group that can reduce the breaking strength of the volume hologram layer. It is characterized by this.

  Such a volume hologram layer 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 layer transfer foil of the present invention. As illustrated in FIG. 1, the volume hologram layer transfer foil 10 of the present invention is formed on a base material 11, a peelable protective layer 12 formed on the base material 11, and the peelable protective layer 12. A volume hologram layer 13 containing a volume polymerizable layer containing a cationic polymerizable compound having a cationic polymerizable functional group and a polymer of a radical polymerizable compound having a radical polymerizable functional group, and on the volume hologram layer 13. And a heat seal layer 14 containing a thermoplastic resin. In such an example, the volume hologram layer transfer foil 10 of the present invention can reduce the breaking strength of the volume hologram layer 13 to the volume hologram layer 13 and has a cationic polymerizable functional group. A polymer of a functional material is included.

  According to the volume hologram layer transfer foil of the present invention, the volume hologram layer contains a cationic polymerizable compound having a cationic polymerizable functional group, and a polymer of a radical polymerizable compound having a radical polymerizable functional group, The breaking strength of the volume hologram layer can be lowered, and the judgment strength of the volume hologram layer can be lowered by containing a polymer of a cationic polymerizable functional material having a cationic polymerizable functional group. Therefore, according to the present invention, it is possible to obtain a volume hologram layer transfer foil having excellent foil cutting properties.

The volume hologram layer transfer foil of the present invention is usually used for producing a volume hologram laminate by transferring a volume hologram layer to an arbitrary transfer target. The volume hologram layer transfer foil of the present invention has at least a substrate, a peelable protective layer, a volume hologram layer, and a heat seal layer, and may have any other configuration as necessary. is there.
Hereafter, each structure used for 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 contains a cationically polymerizable compound having a cationically polymerizable functional group and a polymer of a radically polymerizable compound having a radically polymerizable functional group, on which a volume hologram is recorded. . The volume hologram layer used in the present invention includes a polymer of a cationic polymerizable functional material having a cationic polymerizable functional group, which can reduce the breaking strength of the volume hologram layer. Is. By containing such a polymer of the cationic polymerizable functional material, it is possible to reduce the breaking strength of the volume hologram layer used in the present invention, and as a result, obtain a volume hologram layer transfer foil having excellent foil breakability. It can be done.

  The volume hologram layer used in the present invention contains a polymer of the above cationic polymerizable functional material, cationic polymerizable compound, and radical polymerizable compound. Here, “cationic polymerizable functional material”, “cationic polymerizable compound”, and “radical polymerizable compound” are the same as those described in the section of “A. Composition for forming volume hologram layer” above. Therefore, the description here is omitted.

  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 layer can be formed, and can be appropriately adjusted according to the type of the constituent material described above. it can. 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 more preferably in the range of 3 μm to 25 μm. In the present invention, since the volume hologram layer contains the polymer of the cationic polymerizable functional material, it is possible to obtain a volume hologram layer having good foil breakability regardless of the thickness.

  In the volume hologram layer used in the present invention, the volume hologram layer contains other compounds as required in addition to the cationic polymerizable functional material, the cationic polymerizable compound, and the polymer of the radical polymerizable compound. It may be. As such other compounds, the same compounds as those described in the above section “A. Composition for forming volume hologram layer” can be used.

  The volume hologram layer used in the present invention can be formed by using the volume hologram layer forming composition of the present invention described above. That is, as described above, the volume hologram layer forming composition of the present invention contains a cationic polymerizable functional material, a cationic polymerizable compound, and a radical polymerizable compound. A volume hologram layer used in the present invention can be formed by appropriately polymerizing a cationically polymerizable functional material, a cationically polymerizable compound, and a radically polymerizable compound and recording a volume hologram.

2. Next, the substrate used in the present invention will be described. The substrate used in the present invention is not particularly limited as long as it can support the peelable protective layer, the volume hologram layer, and the heat seal layer used in the present invention. Examples of such a base material include 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, a polyvinyl alcohol film, Examples include polymethyl methacrylate film, polyether sulfone film, polyether ether ketone film, polyamide film, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer film, polyester film such as polyethylene terephthalate film, and resin film such as polyimide film. Can do.

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

3. Next, the peelable protective layer used in the present invention will be described. The peelable protective layer used in the present invention is formed between the base material and the volume hologram layer described above. And since the peelable protective layer is formed in such a position, the volume hologram layer transfer foil of this invention can have the following effects.
First, since the adhesive force between the base material and the volume hologram layer can be adjusted to an arbitrary range by using the peelable protective layer, the volume hologram layer is transferred from the volume hologram layer transfer foil of the present invention. In transferring the film, the peelability of the volume hologram layer from the substrate can be improved.
Second, when the peelable protective layer is used, when the volume hologram layer is transferred to the transfer object using the volume hologram layer transfer foil of the present invention, the surface of the volume hologram layer is covered with the peelable protective layer. Since it can be covered, the transferred volume hologram layer can be protected.

  The material used for the peelable protective layer used in the present invention is not particularly limited as long as it can form a peelable protective layer capable of producing the above-described effects. For example, polymethyl acrylate, A mixture of one or more of acrylic and methacrylic resins such as polymethyl methacrylate, polyvinyl chloride resin, cellulose resin, silicone resin, chlorinated rubber, casein, various surfactants, metal oxides, etc. Can be mentioned.

  Further, the thickness of the peelable protective layer used in the present invention is appropriately selected according to the use and type of the volume hologram layer transfer foil of the present invention, but is usually in the range of 0.1 μm to 20 μm. It is preferable that it is in the range of 0.5 μm to 10 μm.

4). Next, the heat seal layer used in the present invention will be described. The heat seal layer used in the present invention is formed on the above-described volume hologram layer and contains a thermoplastic resin, and the volume hologram layer is transferred to a transfer object using the volume hologram layer transfer foil of the present invention. In doing so, it has a function of adhering the volume hologram layer and the transfer object.
Hereinafter, the heat seal layer used in the present invention will be described in detail.

  As the thermoplastic resin used in the present invention, the volume hologram layer and the transfer target can be bonded in accordance with the type of transfer target to which the volume hologram layer is transferred from the volume hologram layer transfer foil of the present invention. There is no particular limitation. Examples of such thermoplastic resins include ethylene-vinyl acetate copolymer resin, vinyl chloride-vinyl acetate copolymer resin, polyamide resin, polyester resin, polyethylene resin, ethylene-isobutyl acrylate copolymer resin, butyral resin, polyacetic acid. Vinyl and its copolymer resins, ionomer resins, acid-modified polyolefin resins, acrylic / methacrylic (meth) acrylic resins, acrylic ester resins, ethylene / (meth) acrylic acid copolymers, ethylene / (Meth) acrylic acid ester copolymer, polymethyl methacrylate resin, cellulose resin, polyvinyl ether resin, polyurethane resin, polycarbonate resin, polypropylene resin, epoxy resin, phenol resin, vinyl resin, maleic acid resin, Al Resin, polyethylene oxide resin, urea resin, melamine resin, melamine alkyd resin, silicone resin, rubber resin, styrene butadiene styrene block copolymer (SBS), styrene isoprene styrene block copolymer (SIS), styrene ethylene Examples include butylene styrene block copolymer (SEBS) and 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 transfer foil or the transfer target to which the volume hologram layer is transferred using the volume hologram layer transfer foil of the present invention is not limited. Although it is appropriately selected depending on the type and the like, it is usually preferably in the range of 1 μm to 50 μm, and more preferably in the range of 1 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. On the other hand, if it is thicker than the above range, the temperature for heating the heat seal layer becomes too high when the volume hologram layer is transferred from the volume hologram layer transfer foil of the present invention, and the substrate or the like may be damaged. Because there is sex.

5. Other Configurations The volume hologram layer transfer foil of the present invention has at least the above-described base material, peelable protective layer, volume hologram layer, and heat seal layer, but has any configuration other than these as necessary. It may be a thing. As an arbitrary configuration used in the present invention, a desired function can be imparted to the volume hologram layer transfer foil of the present invention or the volume hologram laminate produced using the volume hologram layer transfer foil of the present invention. If it is, it will not specifically limit. Among them, an image forming layer can be mentioned as an arbitrary configuration that is preferably used in the present invention.

  The image forming layer used in the present invention is formed between the volume hologram layer and the heat seal layer, and when the volume hologram laminate is manufactured using the volume hologram layer transfer foil of the present invention. The volume hologram laminate that is transferred together with the volume hologram layer to be transferred can be provided with various functions such as design and anti-counterfeiting function.

  A case where an image forming layer is formed on the volume hologram layer 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 an image forming layer is formed on the volume hologram layer transfer foil of the present invention. As illustrated in FIG. 2, an image forming layer 15 may be formed between the volume hologram layer 13 and the heat seal layer 14 in the volume hologram layer transfer foil 10 of the present invention.

As an image forming layer used in the present invention, an image can be imparted to a volume hologram laminate produced by using the volume hologram layer transfer foil of the present invention, thereby imparting designability, anti-counterfeiting function, and the like. If it is, it will not specifically limit. Such an image forming layer is particularly limited as long as a desired image can be imparted according to the use of the volume hologram laminate produced using the volume hologram layer transfer foil of the present invention. It is not a thing but what formed the image with arbitrary materials can be used.
Note that the image forming layer used in the present invention usually forms an image by forming the image forming layer itself in a pattern, and does not draw an image on the image forming layer.

  Here, the image formed by the image forming layer used in the present invention can be a desired image depending on the use of the volume hologram laminate produced using the volume hologram layer transfer foil of the present invention. The “image” includes not only a pattern, a line drawing, a character, a figure, a symbol, etc., but also a mode in which the entire surface is simply colored.

The image forming layer used in the present invention preferably has a thickness in the range of 0.1 μm to 50 μm, and more preferably in the range of 0.5 μm to 20 μm. When the thickness is thicker than the above range, an uneven shape resulting from the formation of the image forming layer is formed on the surface of the volume hologram laminate manufactured using the volume hologram layer transfer foil of the present invention. Because there is a possibility. Further, if it is thinner than the above range, the storage stability of the image formed in the image forming layer may be impaired.
The image forming layer in the present invention may be formed so as to be embedded in the heat seal layer (see FIG. 2).

Examples of the image forming layer used in the present invention include, for example, a fluorescent image forming layer formed of a fluorescent material that emits fluorescence by absorbing ultraviolet rays, and an optical variable material whose color changes depending on the viewing angle. An optical variable image forming layer can be mentioned. In the present invention, any of these image forming layers can be suitably used. Here, the use of the fluorescent image forming layer makes it possible to prevent the presence of the image forming layer from being easily seen from the outside. Therefore, the volume hologram layer transfer foil of the present invention is used to prevent forgery. There exists an advantage that the volume hologram laminated body excellent in the function can be manufactured. Since the image produced with the optically variable material cannot be duplicated with ordinary ink, the optically variable image forming layer is used so that the volume hologram laminate is further excellent in anti-counterfeiting function. Can be manufactured.
Hereinafter, the optically variable image forming layer and the fluorescent image forming layer used in the present invention will be described in detail.

(Optical variable image forming layer)
First, the optically variable image forming layer used in the present invention will be described. The optically variable image forming layer used in the present invention is formed of an optically variable material. The optically variable material used in the present invention is not particularly limited as long as it can express a desired color. As an example of such an optically variable material, for example, a material capable of expressing the same color as the volume hologram image recorded on the volume hologram layer when viewed from a predetermined angle can be cited. By using such an optically variable material, the image of the image forming layer and the volume hologram image of the volume hologram layer can be made the same color image when viewed from a predetermined angle. By forming the volume hologram image in the hologram layer and the image in the optical variable image forming layer so as to overlap, it becomes possible to prevent the volume hologram from being viewed at a specific angle, and to further improve the security. Will be able to.

  Examples of the optically variable material used in the present invention include pearl pigments, polarizing inks, liquid crystal inks, and retroreflective inks. In the present invention, only one type of these optically variable materials may be used, or two or more types may be used.

Examples of the pearl pigment include pearl essence extracted from seafood, basic lead carbonate, lead acid arsenate, bismuth oxychloride, and mica coated with a metal oxide. In the present invention, any of these pearl pigments can be suitably used, but among these, mica coated with a metal oxide is preferable from the viewpoint of safety. Here, titanium oxide and iron oxide are preferably used as the metal oxide because of its gloss and refractive index.
Further, the pearl pigment used in the present invention may be further colored with a pigment, a dye or the like.

  The polarizing ink and the liquid crystal ink mean an ink obtained by mixing a polarizing cholesteric polymer liquid crystal pigment, a binder, a dispersant, and the like. The polarizing cholesteric polymer liquid crystal pigment is applied to a support while a mixed solution of a crosslinkable liquid crystal polyorganosiloxane and a polymerization initiator is aligned by shearing force, etc., and then crosslinked by ultraviolet irradiation or heating to form a crosslinked liquid crystal layer. It can be obtained by peeling from the support and pulverizing with a mill or the like.

  The retroreflective ink is an ink in which particles serving as a reflecting mirror such as glass beads are dispersed in a binder. Such an ink may be used by mixing with other pigment materials such as mica, aluminum powder, and colored pearl pigment.

(Fluorescent image forming layer)
Next, the fluorescent image forming layer used in the present invention will be described. The fluorescent image forming layer used in the present invention is formed of a fluorescent material that emits fluorescence by absorbing ultraviolet rays. The fluorescent material used in the present invention is not particularly limited as long as it can emit fluorescence having a desired wavelength by absorbing ultraviolet rays.

  At least one type of fluorescent material used in the present invention is used. In this step, 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 it is possible to form a full-color image with fluorescence on the image forming layer used in the present invention.

Examples of the fluorescent material used in the present invention include organic fluorescent dyes and inorganic fluorescent dyes.
Examples of the organic fluorescent dye include diaminostilbene disulfonic acid derivatives, imidazole derivatives, coumarin derivatives, derivatives of triazole, carbazole, pyridine, naphthalic acid, imidazolone, dyes such as fluorescein, 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 fluorescent 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 image forming 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.

  In addition to the image forming layer, as an optional configuration used in the present invention, for example, the adhesion between the volume hologram layer and the heat seal layer, or the adhesion between the volume hologram layer and the peelable protective layer is improved. The primer layer used for making it 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.

6). Method for Producing Volume Hologram Layer Transfer Foil The volume hologram layer transfer foil of the present invention can be produced, for example, by sequentially laminating a peelable protective layer, a volume hologram layer, and a heat seal layer on one side of a substrate. About the method of forming each layer on a base material, since a well-known method can generally be used as a method of manufacturing a volume hologram layer transfer foil, description here is abbreviate | omitted. The volume hologram layer can be easily formed by using the volume hologram layer forming composition according to the present invention.

7). Use of Volume Hologram Layer Transfer Foil The volume hologram layer transfer foil of the present invention is a volume hologram laminate having a structure in which a volume hologram layer is bonded to a transfer target body by transferring the volume hologram layer to the transfer target body. Used for manufacturing.

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

  Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples.

[Example]
1. Production of Volume Hologram Transfer Foil (1) First Laminate A PET film (Lumirror T60 (50 μm): manufactured by Toray Industries, Inc.) is prepared as a first film, and a volume hologram layer forming composition having the following composition is prepared: It was coated with a gravure coat so as to have a dry film thickness of 7 μm, and a surface release treatment PET film (“SP-PET” 50 μm, manufactured by Tosero Co., Ltd.) was laminated on the coated surface to prepare a first laminate. .
<Composition of volume hologram layer forming composition>
-Epoxy group-containing acrylic resin; Blemmer CP-50M (manufactured by NOF Corporation)
(Weight average molecular weight 10,000, epoxy equivalent 310 g / eq.) 35% by weight
・ 1,6-hexanediol diglycidyl ether (Denacol EX-212; manufactured by Nagase ChemteX Corporation) 25% by weight
・ Diphenoxyethanol full orange acrylate (BPEFA; manufactured by Osaka Gas Chemical Co., Ltd.) 35% by weight
・ Diaryliodonium salt (PI2074; Rhodia) 4% by weight
・ 2,5-bis (4-diethylaminobenzylidene) cyclopentanone 1% by weight
・ Methyl isobutyl ketone 100% by weight
1-butanol 100% by weight
・ Monofunctional epoxy monomer YED111AN (manufactured by Japan Epoxy Resin Co.) alkyl monoglycidyl ether 3 parts by weight

(2) Second laminate of substrate / protective layer A PET film (Lumirror T60 (50 μm): manufactured by Toray Industries, Inc.) is prepared as a second film, and a peelable protective layer forming composition having the following composition is prepared. The peelable protective layer was formed by coating with a gravure coat so that the dry film thickness was 1 μm.
<Composition of composition for forming peelable protective layer>
・ 97 parts by weight of polymethyl methacrylate resin (molecular weight: 35000) ・ 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

(3) Recording of Volume Hologram A Lippmann hologram was photographed and recorded on the first film / composition layer for volume hologram layer formation / surface release treatment PET film using a laser beam having a wavelength of 532 nm. After recording, this laminate was heated in an atmosphere of 100 ° C. for 10 minutes, and after heating, the surface release-treated PET film was peeled off and exposed to the volume hologram layer forming composition layer, and the second film / peeling The laminate of the protective protective layer is laminated so that the protective protective layer side is in contact with each other, and is passed through a pair of heated rollers at 80 ° C. that are nipped, so that the first film / volume hologram layer / peelable protective layer / second film Then, the volume hologram layer forming composition layer was fixed by irradiating the entire surface with ultraviolet rays having an irradiation dose of 2500 mJ / cm 2 using a high pressure mercury lamp.

(4) Coating of heat seal layer The first film / volume hologram layer / peelable protective layer / second film prepared as described above is peeled off and the heat seal having the following composition is formed on the volume hologram layer. A heat seal layer was formed by coating the layer forming composition with a gravure coat so as to have a dry film thickness of 4 μm.
<Composition of coating liquid for forming heat seal layer>
Polyester resin (Byron 550, manufactured by TOYOBO, Tg: -15 ° C, molecular weight 280
00) 20 parts by weight / solvent (methyl ethyl ketone / toluene = 1/1 (weight ratio)) 80 parts by weight

(4) Transfer Evaluation The volume hologram transfer foil before storage was transferred to a vinyl chloride card using a commercially available hot stamp machine at a transfer temperature of 150 ° C. and a pressure of 0.8 MPa. When a 5 cm square stamping die was used and the inside of the notch of the transfer foil was hot stamped, it was possible to transfer it into a 5 cm square shape. Further, the same hot stamp transfer evaluation was performed on a forgery prevention paper having a thickness of 125 μm and a weight of 104 g / m 2. It was possible to transfer it neatly into a 5 cm square shape, and almost no burrs were observed.

[Comparative example]
A volume hologram layer transfer foil was prepared in the same manner as in Example 1 except that the composition for forming a volume hologram layer did not contain a monofunctional epoxy monomer YED111AN (manufactured by Japan Epoxy Resin) alkyl monoglycidyl ether. When the transfer evaluation was performed in the same manner as in Example 1, neither the transfer to the vinyl chloride card nor the transfer to the anti-counterfeit paper caused a burr of about 1 mm at the transfer region boundary, and could not be transferred cleanly. .

DESCRIPTION OF SYMBOLS 10 ... Volume hologram layer transfer foil 11 ... Base material 12 ... Peelable protective layer 13 ... Volume hologram layer 14 ... Heat seal layer 15 ... Image formation layer

Claims (3)

A volume hologram layer containing a cationic polymerizable compound having a cationic polymerizable functional group, a radical polymerizable compound having a radical polymerizable functional group, and a binder resin, and used for forming a volume hologram layer on which a volume hologram is recorded A forming composition comprising:
Containing a cationically polymerizable functional material having a cationically polymerizable functional group capable of reducing the breaking strength of the volume hologram layer;
The cationic polymerizable functional material is contained within a range of 1% by mass to 10% by mass with respect to the whole composition for volume hologram layer formation excluding the solvent component,
The cationic polymerizable compound is contained within a range of 10% by mass to 50% by mass with respect to the whole volume hologram layer forming composition excluding the solvent component ,
The cationically polymerizable functional material, wherein the monofunctional compound der Rukoto having a single of the cationic polymerizable functional group in the molecule, the volume hologram layer forming composition. Polymers of cationically polymerizable compound having a cationic polymerizable functional group, polymerization of the radical polymerizable compound having a radical polymerizable functional group, and a binder resin, the volume hologram comprises a volume hologram layer having a volume hologram is recorded A laminate,
The volume hologram layer includes a polymer of a cationic polymerizable functional material capable of reducing the breaking strength of the volume hologram layer and having a cationic polymerizable functional group ,
The polymer of the cationic polymerizable functional material is contained within a range of 1% by mass to 10% by mass with respect to the volume hologram layer,
The polymer of the cationic polymerizable compound is contained within a range of 10% by mass to 50% by mass with respect to the volume hologram layer,
The cationically polymerizable functional material, wherein the monofunctional compound der Rukoto having a single of the cationic polymerizable functional group in the molecule, the volume hologram laminate. A substrate;
A peelable protective layer formed on the substrate;
Wherein formed on the peelable protective layer, a polymer of a cationic polymerizable compound having a cationic polymerizable functional group, and polymers of a radically polymerizable compound having a radical polymerizable functional group, and a binder resin, a volume hologram A volume hologram layer on which is recorded,
A heat seal layer formed on the volume hologram layer and containing a thermoplastic resin;
A volume hologram layer transfer foil having
The volume hologram layer includes a polymer of a cationic polymerizable functional material capable of reducing the breaking strength of the volume hologram layer and having a cationic polymerizable functional group ,
The polymer of the cationic polymerizable functional material is contained within a range of 1% by mass to 10% by mass with respect to the volume hologram layer,
The polymer of the cationic polymerizable compound is contained within a range of 10% by mass to 50% by mass with respect to the volume hologram layer,
The cationically polymerizable functional material, wherein the monofunctional compound der Rukoto having a single of the cationic polymerizable functional group in the molecule, the volume hologram layer transfer foil.

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