JP4564381B2 - Hologram transfer foil and manufacturing method thereof - Google Patents

Description

  The present invention relates to a hologram transfer foil, and more particularly to a hologram transfer foil for transferring a hologram in a desired pattern onto a transfer target and a method for manufacturing the same.

Holograms are, for example, three-dimensional image reproduction and design applications utilizing light interference, anti-counterfeiting applications utilizing the difficulty of forgery, image and information recording / reproduction medium applications, light diffraction, reflection, and scattering. It is an optical article that is used for optical element applications that control the above.
Holograms include holograms such as relief holograms and volume holograms. Relief holograms record and reproduce images and information by forming fine irregularities on the surface. The volume hologram is a hologram formed by recording information in the layer in the thickness direction of the hologram layer and interference fringes corresponding to the wavefront of light from the object in the form of transmittance modulation and refractive index modulation. .

The hologram here is not limited to a three-dimensional image, but also includes an optical element in which a constant continuous pattern or a discontinuous pattern is formed, for example, an antireflection element called a diffraction grating or a moth eye.
Hologram formation methods include recording and forming using the interference phenomenon between the reflected light from the article and the reference light, a method using a computer generated hologram to produce interference fringe data from a digital data related to the object, a diffraction grating, etc. And a method of drawing the pattern with an electron beam.

As a method for applying such a hologram to an article, there is a method using a hologram transfer foil. A conventional hologram transfer foil, for example, a relief type hologram transfer foil, forms a resin layer to be a hologram layer through a release layer on a base film, and forms a hologram relief pattern on the resin layer to form a hologram layer. The reflection layer is provided on the hologram relief pattern, and a heat sealable adhesive layer is further provided.
Such relief-type hologram transfer foil or volume-type hologram transfer foil has good adhesion to the transfer target, and the foil breakage when transferring the hologram to the transfer target in a desired pattern Is required to be good. Further, the transfer target also has a difference in adhesion due to differences in materials such as plastic and paper, and surface characteristics due to surface processing. However, when the adhesive layer is thickened or an adhesive having a low softening temperature is used in order to obtain good adhesiveness to a transfer target having poor adhesiveness, there is a problem that the foil cutting property is lowered.

On the other hand, it is known that an inorganic filler such as silica is contained in the adhesive layer as a means for improving the foil cutting property of the transfer foil (Patent Documents 1 and 2), and such an inorganic filler is added to the hologram transfer foil. It was used. However, when the inorganic filler is contained, there is a problem that the heat seal temperature at the time of transfer becomes high and the hologram layer is easily damaged.
In order to solve such a problem, a hologram transfer foil having a porous adhesive layer having a mat surface is developed (Patent Document 3).
JP-A-4-185498 Japanese Patent Laid-Open No. 9-39391 JP-A-5-155199

However, porous heat-sensitive adhesives have a limited range of material selection, few have a low softening temperature, and have a problem that it is difficult to meet the demand for hologram transfer at a lower heat seal temperature.
The present invention has been made in view of the above circumstances, and is a hologram for transferring a hologram in a desired pattern at a low heat seal temperature to a transfer target having various surface properties such as paper and plastic card. An object of the present invention is to provide a transfer foil and a method for producing the same.

In order to achieve such an object, the hologram transfer foil of the present invention includes a base film, a hologram layer releasably provided on the base film, and an adhesive layer laminated on the hologram layer. And the adhesive layer contains a thermoplastic resin having heat-sealability and hollow resin particles, and the content of the hollow resin particles in the adhesive layer is in the range of 5 to 50% by weight, and the heat The softening temperature of the plastic resin was lower than the softening temperature of the hollow resin particles, and the difference between the softening temperature of the hollow resin particles and the softening temperature of the thermoplastic resin was in the range of 10 to 50 ° C.

As another aspect of the present invention, a release layer is provided between the base film and the hologram layer.
As another aspect of the present invention, the hollow resin particles have an average particle size in the range of 0.05 to 10 μm.
As another aspect of the present invention, the hollow resin particles have a softening temperature in the range of 80 to 150 ° C.
As another aspect of the present invention, the hologram is a relief hologram, or the hologram is a volume hologram.

The method for producing a hologram transfer foil of the present invention includes a step of forming a resin layer to be a hologram layer on a substrate film, forming a hologram relief pattern on the resin layer, and disposing the hologram layer in a peelable manner. A step of providing a reflective layer on the hologram relief pattern of the hologram layer, and applying a coating solution containing a heat-sealable thermoplastic resin, hollow resin particles, water and alcohol onto the reflective layer, and drying at room temperature a step of providing an adhesive layer, was perforated by a softening temperature of the thermoplastic resin is lower than the softening temperature of the hollow resin particles, the softening temperature of the thermoplastic resin and the softening temperature of the hollow resin particles differences ranged der so that construction of the 10 to 50 ° C..

Further, the method for producing a hologram transfer foil of the present invention comprises a step of forming a resin layer to be a hologram layer on a substrate film, forming a volume hologram on the resin layer and disposing the hologram layer in a peelable manner, a thermoplastic resin having heat sealability, hollow resin particles, a coating solution containing water and alcohol was applied to the hologram layer, have a, a step of providing an adhesive layer by cold air blow drying, the heat softening temperature of the thermoplastic resin is lower than the softening temperature of the hollow resin particles, the difference between the softening temperature of the softening temperature and the thermoplastic resin of the hollow resin particles ranged der so that construction of the 10 to 50 ° C..

As another aspect of the present invention, the solid content in the coating solution is in the range of 10 to 60% by weight, and the volume ratio of water to alcohol is in the range of 97: 3 to 70:30. .
In another embodiment of the present invention, a release layer is formed on the base film, and the resin layer is formed on the release layer.

According to the present invention, the hollow resin particles contained in the adhesive layer have extremely good foil breakage at the boundary between the heat-sealed part and the other part. Using a resin with a low softening temperature as a plastic resin, transfer can be performed with a good piece of foil while the heat sealing temperature is lower, and the hollow resin particles also soften during heat sealing and express sealing properties. As a result, the adhesive layer has extremely high adhesiveness, and as a result, the surface is rough, such as paper, and various surfaces such as plastic cards, wrapping paper, and films are difficult to bite into the softened adhesive. It is possible to transfer a hologram in a desired pattern at a low heat seal temperature with respect to a transfer target having the property. Further, even when a resin having a low softening temperature is used as the thermoplastic resin having heat sealability, the hologram transfer foil can be stored in a rolled-up state because blocking hardly occurs.
Further, in the production method of the present invention, an adhesive layer containing hollow resin particles can be formed while imparting an appropriate surface roughness, and a hologram transfer foil that exhibits the above effects can be easily produced. .

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Hologram transfer foil]
FIG. 1 is a schematic sectional view showing an embodiment of the hologram transfer foil of the present invention. In FIG. 1, a hologram transfer foil 1 includes a base film 2, and a hologram layer 4, a reflective layer 5, and an adhesive layer 6 that are sequentially laminated on the base film 2 with a release layer 3 interposed therebetween. .

In the hologram transfer foil 1 of the present invention, the adhesive layer 6 contains a thermoplastic resin having heat sealability and hollow resin particles, and the content of the hollow resin particles in the adhesive layer 6 is 5 to 50% by weight, preferably The softening temperature of the thermoplastic resin is not more than the softening temperature of the hollow resin particles.
If the content of the hollow resin particles is less than 5% by weight, the foil cutting property is insufficient, and if the content exceeds 50% by weight, the hollow resin particles are difficult to soften and high sealing properties are obtained. This is not preferable.
The content of the thermoplastic resin and the hollow resin particles in the adhesive layer is measured by scraping the adhesive layer and measuring the weight according to JIS K 7120: 1987 (regarding a general test method for performing thermogravimetric measurement of plastics). It is carried out by obtaining individual blending amounts from the degree of reduction.

  As the material of the hollow resin particles constituting such an adhesive layer 6, a resin having a softening temperature in the range of 80 to 150 ° C., preferably 90 to 130 ° C. can be used. For example, polymethyl methacrylate, Examples thereof include acrylic resins such as acrylic-styrene copolymers, rubber resins such as styrene-butadiene copolymers and polyisoprene. More specifically, polymerizable monomers for synthesizing such resins include monomers having a carboxyl group such as (meth) acrylic acid and crotonic acid, methyl (meth) acrylate, ethyl (meth) acrylate, propyl ( (Meth) acrylate, butyl (meth) acrylate, hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, cyclohexyl (meth) acrylate, octyl (meth) acrylate, ethoxyethyl (meth) acrylate, 2-methoxyethoxyethyl (meth) ) (Meth) acrylic acid ester monomers such as acrylate and 2-hydroxyethyl (meth) acrylate, vinyl monomers such as styrene, α-methylstyrene and vinylpyrrolidone, diene monomers such as butadiene and isoprene, , Vinyl acetate, vinyl chloride, vinylidene chloride, (meth) acrylamide, acrylonitrile, N-methylol (meth) acrylamide, etc., and using a resin obtained by polymerizing these monomers alone or in combination of two or more. Can do. In particular, in order to adjust to a desired softening temperature, it is preferable to use two or more types of copolymers. From the viewpoint of softening temperature and foil breakability, acrylics such as (meth) acrylic acid and methyl (meth) acrylate are preferred. Monomer copolymers and copolymers of these acrylic monomers and styrene are particularly preferred.

Here, (meth) acryl represents acryl and methacryl, and (meth) acrylate represents acrylate and methacrylate.
As the hollow resin particles to be used, those having an average particle size in the range of 0.05 to 10 μm, preferably 0.3 to 5 μm can be used. It may be.
In addition, the measurement of the average particle diameter of the hollow resin particles is, for example, made by Nikkiso Co., Ltd. according to JIS B 9925: 1997 (regarding a light scattering type automatic particle counter for measuring the size and number of particles in a liquid). Measurement is performed using a Microtrac particle size distribution analyzer UPA. The particle size distribution of the hollow resin particles in the adhesive layer is measured by direct observation with an optical microscope.

  Moreover, as a thermoplastic resin, the thermoplastic resin conventionally used as a heat seal agent can be used. For example, rubber systems such as polybutadiene, polyisoprene, polyisobutylene, styrene-butadiene rubber, styrene-isoprene rubber, polymethyl (meth) acrylic acid, polymethyl (meth) acrylate, poly (meth) acrylic acid, polyethyl (meth) acrylate, Acrylic resin systems such as polypropyl (meth) acrylate, polybutyl (meth) acrylate, poly (2-ethylhexyl) (meth) acrylate, polystyrene systems such as polystyrene and acrylic-styrene copolymers, and polyvinyl ether systems such as polyisobutyl ether , Polyolefins such as polyethylene, polypropylene, polybutene, etc., polyvinyl acetate, vinyl chloride-vinyl acetate, polyvinyl alcohol, polyvinylidene chloride, polyvinyl chloride, polyacrylamide, Li-methylolacrylamide, polyester, polyvinyl butyral, polyurethane, polycarbonate resins, silicone resins, acrylic - silicone resin, polyethylene oxide and the like can be used. Examples of the copolymer include copolymers of vinyl acetate and acrylic resin such as vinyl acetate-butyl (meth) acrylate and vinyl acetate-octyl (meth) acrylate, vinyl chloride-butyl (meth) acrylate, vinylidene chloride- Copolymers such as butyl (meth) acrylate, copolymers such as ethylene-butyl (meth) acrylate, ethylene-methyl (meth) acrylate, and the like can be used. Two or more of these resins may be used. From the viewpoint of softening temperature and adhesion, a copolymer of an olefin resin and an acrylic resin, such as ethylene- (meth) acrylic acid, ethylene-methyl (meth) acrylate, or a blend of an olefin resin and an acrylic resin is particularly preferable. .

The hollow resin particles and the thermoplastic resin described above are preferably emulsions dispersed in water and / or alcohol. Such an emulsion is applied and dried to form the adhesive layer 6 as in the production method described later. Can be formed.
In the present invention, the above-mentioned hollow resin particles contained in the adhesive layer 6 improve the foil cutting property of the hologram transfer foil 1, and therefore, the use of a thermoplastic resin having a low softening temperature that causes a reduction in the foil cutting property. It becomes possible.

  The softening temperature of the thermoplastic resin contained in the adhesive layer 6 is equal to or lower than the softening temperature of the hollow resin particles, and when there is a difference between the two, the temperature difference is in the range of 10 to 50 ° C., preferably 20 to 40 ° C. It can be. If the softening temperature of the hollow resin particles is lower than the softening temperature of the thermoplastic resin, good foil breakability cannot be obtained, and if the difference in softening temperature exceeds 50 ° C, the low temperature utilizing the low softening temperature of the thermoplastic resin. The heat sealability at is not obtained.

  The softening temperature in the present invention is measured by using a thermomechanical measuring device (Rigaku Co., Ltd. Thermo plus TMA 8310) while pressing a quartz load rod for penetration against the sample film with a load of 5.0 g. Heating is performed at a rate of 5 ° C./min in a range of −30 ° C. to 200 ° C., a sinking curve of a quartz load rod is obtained, and a softening temperature is obtained as shown in FIG. If the hollow resin particles are difficult to form alone, the hollow resin particles may be melted to form a film, and then the softening temperature may be measured by the above method. Moreover, the same value can be obtained even if measured according to JIS K 7196 (softening temperature test method by thermomechanical analysis of thermoplastic film and sheet).

  In the present invention, a known filler such as silica fine particles, alumina fine particles, colloidal fine particles and the like may be added to the adhesive layer 6 in order to improve the foil breakability. However, since these fine particles are not usually softened by heat during transfer, the content in the adhesive layer 6 is preferably 10% by weight or less from the viewpoint of low-temperature sealing properties.

  The thickness of the adhesive layer 6 can be set in the range of 0.5 to 30 μm, preferably 1 to 10 μm. If the thickness of the adhesive layer 6 is less than 0.5 μm, it is not preferable because the adhesion of a porous material such as paper to the transferred material is lowered or the unevenness of the transferred material is visible. On the other hand, if the thickness of the adhesive layer 6 exceeds 30 μm, the level difference between the hologram foil after transfer and the surface of the transfer object becomes large, and the hologram foil becomes easy to peel off, which is not preferable.

  In the present invention, the surface average roughness Ra of the adhesive layer 6 is preferably in the range of 0.05 to 2.0 μm. If the surface average roughness Ra is too small, the foil cutting property is insufficient, and if the surface average roughness Ra is too large, the adhesion may be lowered or the hologram layer may be damaged during transfer. The surface average roughness Ra in the present invention is measured under the following measurement conditions.

(Measurement conditions for surface average roughness Ra)
By using the tapping mode of an atomic force microscope (AFM), the uneven state of a 50 μm × 50 μm square region is measured, and the surface average roughness in that range is calculated. The atomic force microscope uses a NanoScope 3A dimension system manufactured by Biko Japan.

  As the base film 2 constituting the hologram transfer foil 1 of the present invention, those having dimensional stability, heat resistance, toughness, etc. can be used. For example, polyethylene, ethylene-vinyl acetate copolymer, polyacetic acid Vinyl, polyvinylidene chloride, polyvinyl fluoride, polyvinylidene fluoride, polystyrene, polymethyl methacrylate, nylon (registered trademark), polynorbornene, polyamide, polyimide, polyether sulfone, polyether ether ketone, triacetyl cellulose, polyethylene terephthalate, poly Vinyl chloride, polypropylene, polycarbonate, cellophane, vinylon (registered trademark), acetate, polyvinyl alcohol, ethylene-vinyl alcohol copolymer, tetrafluoroethylene-perfluoroalkyl vinyl ether Coalescence, a resin film such as a polyamide-imide, paper such as condenser paper, it is possible to use these complexes, and the like. The thickness of the base film 2 can be appropriately set in consideration of the material to be used, and can be set, for example, in the range of about 6 to 50 μm.

  The release layer 3 constituting the hologram transfer foil 1 of the present invention is transferred to the transfer target and located on the outermost surface, and improves the peelability during transfer, the foil breakability, and the transferred hologram layer. It functions as a protective layer. Examples of the material of the release layer 3 include polymethacrylate resin, polyvinyl chloride resin, cellulose resin, silicone resin, hydrocarbon-based wax, polystyrene resin, chlorinated rubber, casein, and various surface activity. An agent, a metal oxide, etc. can be mentioned, These can be used by 1 type or in combination of 2 or more types. Moreover, the thickness of the peeling layer 3 can be suitably set, for example in the range of 0.1-10 micrometers.

The hologram in the hologram layer 4 constituting the hologram transfer foil 1 of the present invention is not limited to a three-dimensional image, but also an optical element in which a constant continuous pattern or a discontinuous pattern is formed, for example, an antireflection element called a diffraction grating or a moth eye. included. For example, the hologram layer 4 can be a relief hologram layer or a volume hologram layer.
When the hologram layer 4 is a relief hologram, it is formed using a thermosetting resin, a thermoplastic resin, an ionizing radiation curable resin or the like in order to form a fine uneven pattern, and the thickness is 0.1 to 20 μm. Preferably, it can set in the range of 0.5-10 micrometers.

  Examples of thermosetting resins include unsaturated polyester resins, acrylic urethane resins, epoxy resins, urethane resins, epoxy-modified acrylic resins, epoxy-modified unsaturated polyester resins, alkyd resins, melamine resins, urea resins, phenol resins, and cellulose resins. Organic-inorganic hybrid resins containing metal alkoxide groups capable of sol-gel reaction with organic components, such as diallyl phthalate resin and polyacetal resin. Thermoplastic resins include acrylic resin, acrylamide resin, polystyrene resin, polyester resin, polyolefin, polyamide, polyimide, polyamideimide, polyurethane, nylon (registered trademark), polyvinyl acetate, polyvinyl alcohol, polyvinyl butyral, polycarbonate, silicone. Examples thereof include resins. These resins can be used alone or in combination of two or more kinds, and various isocyanate resins, metal soaps such as cobalt naphthenate and zinc naphthenate, peroxides such as methyl ethyl ketone peroxide, Thermal or ultraviolet curing agents such as benzophenone, acetophenone, anthraquinone, naphthoquinone, azobisisobutyronitrile, and diphenyl sulfide may be blended.

  In addition, as the ionizing radiation curable resin, a monomer, oligomer, polymer, or the like having an ethylenically unsaturated bond can be used. Examples of the monomer include 1,6-hexanediol, neopentyl glycol diacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, and the like. . Examples of the oligomer include epoxy acrylate, urethane acrylate, and polyester acrylate. Examples of the polymer include urethane-modified acrylic resins and epoxy-modified acrylic resins. From the viewpoints of heat resistance and processability, urethane-modified acrylic resins as described in JP-A No. 2000-63459 are preferably used.

Further, as the photocurable resin used for the hologram layer 4, photocurable resins as described in JP-A-61-98751, JP-A-63-23909, and JP-A-63-23910 are disclosed. Resins can be mentioned.
Moreover, in order to form the uneven | corrugated pattern shape of a relief hologram correctly, polymers, such as a non-reactive acrylic resin, polyester resin, a urethane resin, an epoxy resin, can be added.

Moreover, when utilizing photocationic polymerization, an epoxy group-containing monomer, oligomer, polymer, oxetane skeleton-containing compound, and vinyl ethers can be used.
Further, when the ionizing radiation curable resin is cured by light such as ultraviolet rays, a photopolymerization initiator can be added. Depending on the resin, a radical photopolymerization initiator, a cationic photopolymerization initiator, or a combination thereof (hybrid type) can be selected.

  Examples of the photo radical polymerization initiator include benzoin compounds such as benzoin, benzoin methyl ether, and benzoin ethyl ether, anthraquinone compounds such as anthraquinone and methylanthraquinone, acetophenone, diethoxyacetophenone, benzophenone, hydroxyacetophenone, and 1-hydroxycyclohexyl. Examples include phenyl ketone compounds such as phenyl ketone, α-aminoacetophenone, 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one, benzyldimethyl ketal, thioxanthone, acylphosphine oxide, Michler's ketone, and the like. be able to.

As a photocationic polymerization initiator when using a compound capable of photocationic polymerization, aromatic diazonium salts, aromatic iodonium salts, aromatic sulfonium salts, aromatic phosphonium salts, mixed ligand metal salts, etc. should be used. Can do.
In the case of so-called hybrid type materials that use both radical photopolymerization and cationic photopolymerization, each polymerization initiator can be mixed and used, and a fragrance that has the function of initiating polymerization of both with a single initiator. Group iodonium salts, aromatic sulfonium salts, and the like can be used.

Furthermore, a release agent can be added to the hologram layer 4 in order to facilitate the formation of the concavo-convex pattern of the hologram. Examples of the release agent include known release agents and surfactants, for example, solid waxes such as polyethylene wax and amide wax, fluorine compounds, fluorine polymers, phosphate esters, silicone oils, and silicone resins.
Moreover, in order to make the uneven shape of the relief accurate, or to impart hardness and heat resistance, inorganic oxide fine particles such as silica, titania and alumina, metal alkoxide, metal alkoxide oligomer and the like can be added.
Furthermore, a polymerization inhibitor, an antioxidant, a sensitizer, an ultraviolet absorber, a stabilizer, a plasticizer, an antifoaming agent, and the like can be added to the hologram layer 4.

When the hologram layer 4 is a volume hologram, it can be formed using silver salt, dichromated gelatin, photocrosslinking material, photopolymer (photopolymerizable material), etc. It is preferable to use a photopolymer capable of producing a volume hologram.
The photopolymer contains, as main components, a binder resin, a photopolymerizable compound serving as a refractive index modulation component, a photopolymerization initiator, and a sensitizing dye added as necessary.

  As the binder resin, various thermoplastic resins, thermosetting resins, and photocurable resins can be used. For example, acrylic resins such as polymethyl methacrylate, vinyl acetate resins, polyvinyl butyral resins, polyacetal resins, polydimethyl resins. Examples thereof include siloxane resins such as siloxane, urethane resins, bisphenol A type epoxy resins, and organic-inorganic hybrid resins containing metal alkoxide groups capable of sol-gel reaction with organic components. These resins can be used alone or in combination.

As the photopolymerizable compound, a photo radical polymerizable compound, a photo cation polymerizable compound, or a photo anion polymerizable compound can be used. From the wide selectivity of materials, a photo radical polymerizable compound, a photo cation polymerizable compound are used. Is preferably used. For example, photo-radically polymerizable compounds such as fluorene skeleton-containing diacrylate and dimethacrylate, biphenyl skeleton-containing diacrylate and dimethacrylate, bisphenol skeleton-containing diacrylate and dimethacrylate, polyalkylene glycol diacrylate and dimethacrylate, and phenyl group skeleton-containing acrylate And photocationically polymerizable compounds such as alicyclic epoxy, 1,6-hexanediol diglycidyl ether, polyalkylene glycol diglycidyl ether, and oxetane skeleton-containing compound. These compounds can be used alone or in combination.
A photoinitiator can be selected according to the photopolymerizable compound to be used.

As radical photopolymerization initiators, 1,3-di (t-butyldioxycarbonyl) benzophenone, 3,3 ′, 4,4′-tetrakis (t-butyldioxycarbonyl) benzophenone, N-phenylglycine, 2 , 4,6-tris (trichloromethyl) -s-triazine, 3-phenyl-5-isoxazolone, 2-mercaptobenzimidazole, imidazole dimers and the like.
Examples of the photocationic polymerization agent when using a compound capable of photocationic polymerization include aromatic diazonium salts, aromatic iodonium salts, aromatic sulfonium salts, aromatic phosphonium salts, mixed ligand metal salts such as (η ⁶ -Benzene) (η ⁵ -cyclopentadienyl) iron (II), silanol-aluminum complex and the like.

In the case of a so-called hybrid material that uses both radical photopolymerization and cationic photopolymerization, each polymerization initiator can be mixed and used, and the function of starting both polymerizations with a single initiator Aromatic iodonium salts, aromatic sulfonium salts, and the like can be used.
The photopolymerization initiator is preferably decomposed after hologram recording from the viewpoint of stabilizing the volume hologram to be recorded.

  Sensitizing dyes include thiopyrylium salt dyes, merocyanine dyes, quinoline dyes, styrylquinoline dyes, ketocoumarin dyes, thioxanthene dyes, xanthene dyes, oxonol dyes, cyanine dyes, rhodamine dyes, pyrylium Examples thereof include salt dyes, cyclopentanone dyes, and cyclohexanone dyes. The visible light sensitizing dye is preferably one that becomes colorless by post-processing after volume hologram recording, decomposition by heating or ultraviolet irradiation, etc., when high transparency like an optical dye is required.

The thickness of the volume hologram layer as described above can be appropriately set in the range of, for example, 1 to 100 μm, preferably 3 to 40 μm.
In addition, it is preferable to use the resin material used for said hologram layer 4 whose glass transition temperature is higher than the heat seal temperature at the time of transcription | transfer.

  The reflection layer 5 constituting the hologram transfer foil 1 of the present invention uses a metal thin film that reflects light when the transfer foil hologram is formed as a reflection type, and when the hologram is a transmission type, the hologram A hologram effect thin film that expresses a hologram in combination with the layer 4 and that does not conceal the lower layer is used. When the hologram layer 4 is a volume hologram, the reflection layer 5 is not necessary.

  Examples of the metal thin film used for the reflection hologram include Cr, Ti, Fe, Co, Ni, Cu, Zn, Ag, Au, Ge, Al, Mg, Sb, Pb, Pd, Cd, Bi, Sn, A metal such as Se, In, Ga, or Rb, or an oxide, nitride, or sulfide thereof can be used alone or in combination of two or more. Among the above metal thin films, Al, Cr, Ni, Ag, and Au are particularly preferable. The thickness of such a metal thin film can be appropriately set in the range of 10 to 10,000 mm, preferably 200 to 2000 mm.

  In addition, the hologram effect thin film used in the transmission hologram is not particularly limited as long as it is light-transmissive so that the hologram effect can be exhibited. For example, a transparent material having a refractive index different from that of the resin constituting the hologram layer 4 can be used. In this case, the refractive index of the hologram effect thin film may be larger or smaller than the refractive index of the hologram layer 4, and the difference in refractive index is 0.1 or more, preferably 0.5 or more.

  In addition, as the hologram effect thin film, a film made of a resin having a refractive index different from that of the hologram layer, a film containing a fluorine compound, metal oxide, metal fine particles, metal oxide fine particles, or the like, a colloidal solution of metal fine particles or metal oxide fine particles is used. The thin film prepared in this manner, a film made of a hydrolyzed polycondensate of an organometallic compound such as a metal alkoxide, and the like can be used.

  In the embodiment of the hologram transfer foil of the present invention described above, the hologram layer 4 is disposed on the base film 2 with the release layer 3 interposed therebetween, but the surface of the base film 2 has suitable peelability. In some cases, or when the resin itself forming the hologram layer has suitable peelability, the hologram layer 4 may be disposed on the base film 2 without the release layer 3 interposed.

  The hologram transfer foil of the present invention can be transferred by heating and pressurizing, and a transfer system such as a heat stamp type or a roll type can be used as the transfer device. Examples of the transfer object of the hologram transfer foil of the present invention include paper, synthetic paper, plastic and metal films and sheets, plastic plates, glass plates, and the like. Examples of the plastic include a vinyl chloride resin, an acrylic resin, a polystyrene resin, a polyester resin such as polyethylene terephthalate, and a polycarbonate resin. In addition, for the purpose of utilizing the design property of the hologram, a wrapping paper, a packaging film, a premium card, a magazine, a book, or the like may be used as a transfer target. Also, utilizing the fact that holograms are difficult to counterfeit, a medium for authenticity that requires high anti-counterfeiting properties, such as bank savings cards, passbooks, credit cards, identification cards, examination cards, passports, Bills, gift certificates, stock certificates, boarding tickets, air tickets, prepaid cards such as transportation and public telephones, and the like may be used as the transfer target. Or luxury watches, precious metals, jewelry, world-renowned luxury products that are said to be so-called brand goods, and products that are subject to counterfeiting, tags attached to them, music software, video software, computer software, game software, etc. Articles such as recording media on which these are recorded and cases thereof can also be cited as the transfer target. In addition, information can be recorded on the hologram layer as necessary.

Further, as a transfer object of the hologram transfer foil of the present invention, an optical element having an optical function or controlling reflected light, such as a reflection plate, an antireflection plate, a polarizing plate, a light guide plate, etc. Examples thereof include members installed inside or on the surface of display windows of instruments, mobile phones and the like.
The transfer of the hologram transfer foil of the present invention may be either a transfer to a part of the transfer target or a transfer to the entire surface. In the case of transfer to a part, transfer of a complicated pattern or characters, etc. Transfer may be performed using a mold.

  FIG. 3 is a diagram showing a transfer example using the above-described hologram transfer foil 1 of the present invention. As shown in FIG. 3, the hologram transfer foil 1 of the present invention is placed on the transfer target 11 so that the adhesive layer 6 is in contact, and is thermocompression-bonded from the base film 2 side by a heat stamp 21 having a desired pattern. Then, heat sealing is performed, and then the hologram transfer foil 1 is peeled off. At the time of this peeling, the boundary between the heat-sealed part and the other part (shown by the chain line in FIG. 3) due to the hollow resin particles contained in the adhesive layer 6 and the appropriate surface roughness of the adhesive layer 6. A favorable foil breakage occurs at the location), and the release layer 3, hologram layer 4, reflection layer 5, and adhesive layer 6 in the area pressed by the heat stamp 21 are transferred to the transfer body 11. Moreover, in the area | region pressed with the heat stamp 21, since the hollow resin particle also softens and expresses sealing performance, the adhesiveness of the adhesive bond layer 6 becomes extremely high.

[Method for producing hologram transfer foil]
Next, the method for producing a hologram transfer foil of the present invention will be described using the hologram transfer foil 1 shown in FIG. 1 as an example.
In the production method of the present invention, a release layer 3 is formed on a base film 2, a resin layer to be a hologram layer 4 is formed on the release layer 3, and a hologram relief pattern is formed on the resin layer to form a hologram layer 4, a step of providing the reflective layer 5 on the hologram relief pattern of the hologram layer 4, and a step of providing the adhesive layer 6 on the reflective layer 5.

  The formation of the release layer 3 on the base film 2 is performed by using the material used for the release layer 3 as necessary with acetone, methyl ethyl ketone, cyclohexanone, benzene, toluene, xylene, ethyl acetate, methanol, ethanol, isopropanol, A coating solution is prepared by mixing with a solvent such as 1-butanol. The coating liquid is formed by a known coating method, for example, gravure coating method, roll coating method, curtain coating method, flow coating method, lip coating method, doctor blade coating method, comma coating method, die coating method, spin coating method, etc. The release layer 3 can be formed by coating on the film 2. In addition, after application | coating, if necessary, it dries at 50-180 degreeC, for example, volatilizes a solvent, and if necessary, it can dry again and the peeling layer 3 can be formed.

  In addition, the hologram layer 4 is formed by first using the material used for the hologram layer 4 as necessary with acetone, methyl ethyl ketone, cyclohexanone, benzene, toluene, xylene, ethyl acetate, methanol, ethanol, isopropanol, 1-butanol. A coating solution is prepared by mixing with a solvent such as the above. This coating solution is peeled off by a known coating method such as gravure coating method, roll coating method, curtain coating method, flow coating method, lip coating method, doctor blade coating method, comma coating method, die coating method, spin coating method, etc. 3 is applied to form a resin layer. In addition, after application | coating, as needed, it can dry at 50-180 degreeC, for example, and a solvent is volatilized, If necessary, it can dry again and a resin layer can be formed.

  In the formation of the relief-type hologram layer 4, a hologram or diffraction grating produced using a laser beam or an electron beam is used as an original, and this original is brought into close contact with an uncured resin layer. The hologram layer 4 is formed by curing with ionizing radiation such as an electron beam or heat. Alternatively, a nickel stamper produced by electroforming using the above master as a mother mold, a stamper, a thermosetting resin, or a photocurable resin composition that has a concavo-convex pattern replicated by hot pressing using a thermoplastic resin. A resin stamper made by pouring into a concavo-convex pattern and curing is adhered to an uncured resin layer, and in that state, the resin layer is cured by ionizing radiation such as ultraviolet rays and electron beams, or by heat. Layer 4 is formed.

  In addition, after forming a solid resin layer at room temperature, the stamper prepared from the hologram master or the master is in close contact with the uncured resin layer (heat-adhered as necessary), and after peeling the master or stamper, The resin layer may be cured by ultraviolet rays, electron beams, heat, or the like to form the hologram layer 4.

  When the hologram layer 4 is a volume hologram layer 4, the volume hologram 4 is not directly formed on the base film 2 or the release layer 3 provided on the base film 2. The hologram transfer foil is preferably produced as follows. That is, first, the volume hologram 4 is formed on the temporary substrate as described above to produce a volume hologram forming film. Next, the hologram layer 4 is laminated on the release layer 3 provided on the base film 2, and then the temporary base material is peeled off. Next, the adhesive layer 6 can be formed on the hologram layer 4 as follows to obtain the hologram transfer foil 1 of the present invention. Note that after transferring the hologram layer 4 onto the release layer 3, the hologram layer 4 may be sufficiently cured by heating, ultraviolet irradiation, or the like.

  In the formation of the volume hologram layer 4 described above, the volume hologram is formed as described above on the resin layer formed on the temporary base material. However, when the resin layer formed on the temporary substrate has adhesiveness. May be protected by covering the resin layer with a protective film until just before the hologram formation. Such a protective film can be used by appropriately selecting from those mentioned as the base film. Then, visible laser light, for example, visible laser such as argon ion laser (wavelength 458 nm, 488 nm, 514.5 nm), krypton ion laser (wavelength 647.1 nm), helium ion laser (wavelength 633 nm), YAG laser (wavelength 532 nm), etc. Alternatively, a volume hologram is recorded on the resin layer using ionizing radiation such as ultraviolet light or electron beam.

  As the volume hologram recording method, any conventionally known method may be used. For example, a volume hologram can be recorded by attaching an original plate to a photosensitive resin layer and performing interference exposure using ionizing radiation such as visible light, ultraviolet light, or electron beam from the transparent temporary substrate side. it can.

Further, in order to promote the refractive index modulation and complete the polymerization reaction, after the interference exposure, it is possible to appropriately perform a process such as full exposure with ultraviolet rays or heating.
In the step of providing the reflective layer 5 on the relief pattern of the relief-type hologram layer 4, known methods such as vacuum deposition, sputtering, reactive sputtering, ion plating, electroplating, and coating can be used.

In the step of providing the adhesive layer 6 on the reflective layer 5, a coating solution (preferably in an emulsion state) containing a heat-sealable thermoplastic resin, hollow resin particles, water and alcohol is applied on the reflective layer 5. Then, the adhesive layer 6 is formed by drying at room temperature, for example, drying at a temperature of 15 to 35 ° C. and an air volume of 10 to 100 m ³ / min, and drying again as necessary. The above-mentioned materials can be used for the thermoplastic resin and hollow resin particles to be used. The solid content in the coating solution can be 10 to 60% by weight, preferably 20 to 50% by weight. Examples of the alcohol used include methanol, ethanol, propanol, isopropanol, n-butanol, and isobutanol. The volume ratio of water and alcohol in the coating solution is preferably set in the range of 97: 3 to 70:30. When the amount of alcohol deviates from the above range, it becomes difficult to obtain an appropriate surface roughness by normal temperature air drying.
The thermoplastic resin and the hollow resin particles to be used have respective weights, for example, Mettler-Toledo K. et al. K. A basic electronic balance AB-S series is weighed and blended in a desired range.

By applying the coating liquid as described above onto the reflective layer 5 and drying at normal temperature by blowing with air, the formed adhesive layer 6 has fine irregularities on the surface. This room temperature air drying is performed under conditions such as the air flow and the air blowing direction according to the coating liquid used so that the adhesive layer 6 has an appropriate surface roughness (for example, Ra is in the range of 0.05 to 2.0 μm). Can be set.
In addition, the formation of the adhesive layer on the hologram layer in the case of the volume hologram can be performed in the same manner as the formation of the adhesive layer 6 described above. In order to further improve the adhesion between the hologram layer and the adhesive layer, a primer layer may be interposed.

Next, the present invention will be described in more detail by showing more specific examples.
[Example 1]
On one side of a 25 μm thick polyethylene terephthalate film (Lumirror T-60 manufactured by Toray Industries, Inc.), a coating solution for release layer (Haklinis 45-3 manufactured by Showa Ink Industry Co., Ltd.) was applied at 30 m / The film was applied at a rate of minutes, and then dried at 100 ° C. to volatilize the solvent, thereby forming a release layer (film thickness of about 1 μm).

Next, the hologram layer coating liquid A having the following composition is applied onto the release layer at a speed of 30 m / min by the gravure coating method, dried at 100 ° C. to volatilize the solvent, and the hologram layer A forming resin layer (film thickness of about 3 μm) was formed.
(Composition of coating liquid A for hologram layer)
・ Photocurable resin: 100 parts by weight (Mitsubishi Chemical Corporation Iupimer UV LZ065S)
-Photopolymerization initiator: 5 parts by weight (Irgacure 907 manufactured by Ciba Specialty Chemicals)
・ Methyl ethyl ketone: 300 parts by weight

Next, hologram replication was performed as follows to form a hologram layer.
First, a hologram master was produced using laser light, and this hologram master was mounted on an embossing roller of a continuous replication device. Subsequently, the base film on which the resin layer is formed as described above is installed on the paper feeding side of the continuous duplicating apparatus, and is supplied to the embossing roller at a speed of 20 m / min, the press pressure is 1 × 10 ⁵ Pa, the roll temperature. The uneven | corrugated pattern was formed in the resin layer by crimping | bonding at 140 degreeC. Subsequently, the resin layer was cured by irradiating ultraviolet rays generated from a high-pressure mercury lamp, and a relief was formed to form a hologram layer.

Next, an aluminum layer having a thickness of 500 mm was formed on the hologram layer by a vacuum deposition method to obtain a reflective layer.
Next, a coating solution for the adhesive layer having the following composition is applied on the reflective layer at a speed of 30 m / min by the gravure coating method, followed by drying at room temperature and blowing (25 ° C., air volume 50 m ³ / min). (Film thickness of about 2 μm) was formed. The coating liquid for the adhesive layer was adjusted so that the solid content was 30%. The content of the hollow resin particles in the adhesive layer was 17% by weight.

Thereby, the hologram transfer foil of the present invention was obtained.
(Coating solution composition for adhesive layer)
・ Thermoplastic heat seal emulsion: 50 parts by weight (in terms of solid content)
(Aquatex AC-3100 manufactured by Chuo Rika Kogyo Co., Ltd.)
・ Hollow resin particle-containing emulsion: 10 parts by weight (in terms of solid content)
(Nipol-CMH5055 manufactured by Nippon Zeon Co., Ltd.)
・ Isopropanol: 15 parts by weight

Here, the softening temperature of the solid content (thermoplastic resin) of the thermoplastic heat seal emulsion and the softening temperature of the solid content (hollow resin particles) of the emulsion containing hollow resin particles were measured under the following conditions. As a result, the softening temperature of the thermoplastic resin was 80 ° C., and the softening temperature of the hollow resin particles was 100 ° C.
(Measurement conditions for softening temperature)
Using a thermo mechanical analyzer (TMA), a quartz load rod for penetration was pressed against the specimen film with a load of 5.0 g, and the temperature rising rate was 5
Heat in the range of -30 ° C to 200 ° C at ° C / min, obtain the sink curve of the quartz load rod, and obtain the softening temperature as shown in FIG.

[Example 2]
A hologram transfer foil of the present invention was obtained in the same manner as in Example 1 except that the coating liquid B having the following composition was used as the coating liquid for the hologram layer.
(Composition of coating liquid B for hologram layer)
-Urethane-modified reactive acrylic resin: 100 parts by weight-Dipentaerythritol hexaacrylate: 30 parts by weight-Silicone oil: 3 parts by weight (KF-7312F manufactured by Shin-Etsu Chemical Co., Ltd.)
-Photopolymerization initiator: 5 parts by weight (Irgacure 907 manufactured by Ciba Specialty Chemicals)
・ Methyl ethyl ketone: 300 parts by weight

  In addition, said urethane-modified reactive acrylic resin was manufactured as follows. That is, a 2-liter four-necked flask equipped with a condenser, a dropping funnel, and a thermometer was charged with 40 g of toluene and 40 g of methyl ethyl ketone together with an azo initiator, and 22.4 g of 2-hydroxyethyl methacrylate and 53.4 g of methyl methacrylate. A mixture of 7.4 g of methacrylic acid, 13.9 g of isobornyl methacrylate, 30 g of toluene and 20 g of methyl ethyl ketone was allowed to react at a temperature of 100 to 110 ° C. for 8 hours while dropping dropwise over about 2 hours through a dropping funnel. And cooled to room temperature. To this was added 27.8 g of 2-isocyanatoethyl methacrylate (Karenz MOI manufactured by Showa Denko KK), 20 g of propylene glycol monomethyl ether acetate and 20 g of methyl ethyl ketone, and an addition reaction was carried out using dibutyltin laurate as a catalyst.

[Example 3]
As a temporary substrate, a polyethylene terephthalate (Lumirror T-60 manufactured by Toray Industries, Inc.) film having a thickness of 25 μm was prepared. The film was applied at a rate of / min and dried at 100 ° C. to evaporate the solvent, thereby forming a resin layer (film thickness of about 5 μm ) for forming the hologram layer. Further, on this resin layer, a polyethylene terephthalate (Lumirror T-60 manufactured by Toray Industries, Inc.) film having a thickness of 50 μm was laminated as a protective film to prepare a volume hologram forming film.

(Composition of coating liquid C for hologram layer)
・ Polymethyl methacrylate: 100 parts by weight • 9,9-bis (4-acryloxydiethoxyphenyl) fluorene: 5 parts by weight • 1,6-hexanediol diglycidyl ether: 70 parts by weight • Diphenyliodonium hexafluoroantimonate: 5 parts by weight-3,9-diethyl-3'-carboxymethyl-2,2'-thiocarbocyanine iodonium salt
... 1 part by weight-Methyl ethyl ketone ... 30 parts by weight-Methanol ... 30 parts by weight

  Next, the protective film of the volume hologram forming film was peeled off, and the volume hologram forming film was laminated so that the resin layer was in contact with the volume hologram original plate prepared in advance. Next, exposure was performed by irradiating an argon laser (wavelength: 514 nm) from the temporary substrate side, and then exposure was performed using a high-pressure mercury lamp, and the volume hologram layer was formed by peeling from the hologram master.

On the other hand, in the same manner as in Example 1, a release layer was formed on one surface of a 25 μm thick polyethylene terephthalate (Lumirror T-60 manufactured by Toray Industries, Inc.) film. A volume hologram forming film was laminated on the release layer so that the volume hologram layer was in contact with the release layer. In this state, the volume hologram layer was cured by further heating and ultraviolet irradiation.
Next, the temporary base material was peeled off, and an adhesive layer (film thickness of about 2 μm ) was formed on the exposed volume hologram layer in the same manner as in Example 1. Thereby, the hologram transfer foil of the present invention was obtained.

[Comparative Example 1]
Except that the emulsion containing the hollow resin particles constituting the coating solution for the adhesive layer of Example 1 was replaced with the same weight of thermoplastic heat seal emulsion (Aquatex AC-3100 manufactured by Chuo Rika Kogyo Co., Ltd.) A hologram transfer foil was prepared in the same manner as in Example 1.

[Comparative Example 2]
Except that the hollow resin particle-containing emulsion constituting the coating solution for the adhesive layer of Example 1 was changed to colloidal silica (Snowtex PS-SO manufactured by Nissan Chemical Industries, Ltd.), the same as in Example 1. A hologram transfer foil was prepared.

[Evaluation of hologram transfer foil]
(Evaluation of transferability)
The hologram transfer foil produced as described above was superposed on the paper as the transfer target so that the adhesive layer was in contact, and pressure-bonded by a heat stamp from the transfer foil side at 110 ° C. and 3.0 MPa. Thereafter, the hologram transfer foil was peeled off, and the transferred hologram was evaluated according to the following criteria. The results are shown in Table 1 below.
Evaluation criteria ○: The shape of the heat stamp is faithfully reproduced.
X: Burr, chipping or the like occurs, and the shape of the heat stamp is not reproduced.

(Evaluation of hologram appearance)
The hologram was transferred under the same conditions as the transferability evaluation, and the transferred hologram was visually observed and evaluated according to the following criteria. The results are shown in Table 1 below.
Evaluation criteria ○: There is no change in the color and brightness of the hologram as compared with before transfer, and there is no occurrence of scratches.
X: Any of the color of the hologram, change in luminance, and generation of scratches are observed.

(Evaluation of adhesion)
The hologram is transferred under the same conditions as the transferability evaluation, and an adhesive tape (cellophane tape manufactured by Nichiban Co., Ltd.) is firmly attached to the transferred hologram. The results are shown in Table 1 below.
Evaluation criteria ○: The hologram cannot be removed from the transferred object, or the transferred object and the hologram
Can be removed in one piece (destruction occurs in the paper to be transferred).
X: Only a hologram can be taken from the transfer target.

(Evaluation of water resistance)
Transfer the hologram under the same conditions as the transferability evaluation, immerse the transferred object together with the transferred hologram in room temperature water for 48 hours, observe the presence or absence of peeling of the hologram from the transferred object, and evaluate according to the following criteria The results are shown in Table 1 below.
Evaluation criteria ○: There is no peeling of the hologram from the transfer target.
X: Separation of the hologram from the transfer target occurs.

As shown in Table 1, it is confirmed that the hologram transfer foils of the present invention (Examples 1 to 3) all have excellent transferability, and the transferred hologram has good appearance, adhesion, and water resistance. It was.
On the other hand, the hologram transfer foil of Comparative Example 1 had poor transferability and the appearance of the transferred hologram was poor. Further, the hologram transfer foil of Comparative Example 2 had poor transferability and poor adhesion to the transferred hologram foil.

[Example 4]
Table 2 below shows the same procedure as in Example 1 except that the amount of the hollow resin particle-containing emulsion constituting the coating solution for the adhesive layer of Example 1 was changed and the transfer temperature was 120 ° C. As described above, five types of hologram transfer foils (Samples 1 to 5) in which the content of the hollow resin particles in the adhesive layer was changed were prepared.
The transferability, hologram appearance, adhesion and heat resistance of the hologram transfer foils (samples 1 to 5) produced as described above were evaluated by the same methods as described above, and the results are shown in Table 2 below.

As shown in Table 2, the samples 2 to 4 in which the content of the hollow resin particles contained in the adhesive layer is in the range of 5 to 50% by weight are all excellent in transferability, and the transferred hologram is good. It was confirmed that it had excellent appearance, adhesion and water resistance.
However, the sample 1 in which the content of the hollow resin particles contained in the adhesive layer is less than 5% by weight has poor transferability, and the sample 5 in which the content of the hollow resin particles exceeds 50% by weight The film was not good, and the film thickness was uneven.
[Example 5]
In the same manner as in Example 3, a volume hologram layer was formed, this volume hologram layer was transferred onto a release layer and cured, and then an adhesive layer was formed on the volume hologram layer. This adhesive layer was the same as in Example 1 except that the amount of the hollow resin particle-containing emulsion constituting the coating solution for the adhesive layer of Example 1 was changed and the transfer temperature was 120 ° C. As shown in Table 3 below, the content of the hollow resin particles in the adhesive layer was changed. This produced five types of hologram transfer foils (Samples 1 to 5).
The transferability, hologram appearance, adhesion, and heat resistance of the hologram transfer foils (samples 1 to 5) produced as described above were evaluated by the same methods as described above, and the results are shown in Table 3 below.

As shown in Table 3, the samples 2 to 4 in which the content of the hollow resin particles contained in the adhesive layer is in the range of 5 to 50% by weight are all excellent in transferability, and the transferred hologram is good. It was confirmed that it had excellent appearance, adhesion and water resistance.
However, the sample 1 in which the content of the hollow resin particles contained in the adhesive layer is less than 5% by weight has poor transferability, and the sample 5 in which the content of the hollow resin particles exceeds 50% by weight The film was not good, and the film thickness was uneven.

  The present invention can be applied to a hologram transfer foil for transferring a hologram foil to a material to be transferred of various materials.

It is a schematic sectional drawing which shows one Embodiment of the hologram transfer foil of this invention. It is a figure for demonstrating the measurement of the softening temperature of the adhesive bond layer in this invention. It is a figure which shows the example of transcription | transfer using the hologram transfer foil of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Hologram transfer foil 2 ... Base film 3 ... Release layer 4 ... Hologram layer 5 ... Reflective layer 6 ... Adhesive layer 11 ... Transfer object

Claims (10)

A thermoplastic resin having at least a base film, a hologram layer releasably provided on the base film, and an adhesive layer laminated on the hologram layer, wherein the adhesive layer has heat sealability The hollow resin particles in the adhesive layer have a content of 5 to 50% by weight, and the softening temperature of the thermoplastic resin is lower than the softening temperature of the hollow resin particles. The hologram transfer foil , wherein the difference between the softening temperature of the resin particles and the softening temperature of the thermoplastic resin is in the range of 10 to 50 ° C.   The hologram transfer foil according to claim 1, further comprising a release layer between the base film and the hologram layer.   3. The hologram transfer foil according to claim 1, wherein an average particle diameter of the hollow resin particles is in a range of 0.05 to 10 μm. Hologram transfer foil according to any one of claims 1 to 3, wherein the softening temperature of the hollow resin particles is in the range of 80 to 150 ° C.. The hologram transfer foil according to any one of claims 1 to 4 , wherein the hologram is a relief hologram. The hologram transfer foil according to any one of claims 1 to 4 , wherein the hologram is a volume hologram. Forming a resin layer to be a hologram layer on a substrate film, forming a hologram relief pattern on the resin layer and disposing the hologram layer in a peelable manner;
Providing a reflective layer on the hologram relief pattern of the hologram layer;
A thermoplastic resin having heat sealability, hollow resin particles, a coating solution containing water and alcohol was applied onto the reflective layer, have a, a step of providing an adhesive layer by cold air blow drying, the heat softening temperature of the thermoplastic resin is lower than the softening temperature of the hollow resin particles, a hologram, characterized in range der Rukoto differences 10 to 50 ° C. and the softening temperature of the softening temperature and the thermoplastic resin of the hollow resin particles A method for producing a transfer foil. Forming a resin layer to be a hologram layer on a substrate film, forming a volume hologram on the resin layer and disposing the hologram layer in a peelable manner;
A thermoplastic resin having heat sealability, hollow resin particles, a coating solution containing water and alcohol was applied to the hologram layer, have a, a step of providing an adhesive layer by cold air blow drying, the heat softening temperature of the thermoplastic resin is lower than the softening temperature of the hollow resin particles, a hologram, characterized in range der Rukoto differences 10 to 50 ° C. and the softening temperature of the softening temperature and the thermoplastic resin of the hollow resin particles A method for producing a transfer foil. Wherein the range of the solids content from 10 to 60 wt% in the coating solution, water and an alcohol volume ratio of 97: 3 to 70: in the range of 30 to claim 7 or claim 8, characterized in A method for producing the hologram transfer foil according to claim. The release layer is formed on the base film, the manufacturing method of the hologram transfer foil according to any one of claims 7 to 9, characterized in that to form the resin layer on the release layer.

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