WO2018070484A1 - 転写箔、セキュリティ積層体、および、セキュリティ積層体の製造方法 - Google Patents
転写箔、セキュリティ積層体、および、セキュリティ積層体の製造方法 Download PDFInfo
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- WO2018070484A1 WO2018070484A1 PCT/JP2017/037031 JP2017037031W WO2018070484A1 WO 2018070484 A1 WO2018070484 A1 WO 2018070484A1 JP 2017037031 W JP2017037031 W JP 2017037031W WO 2018070484 A1 WO2018070484 A1 WO 2018070484A1
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- resin
- transfer
- layer
- relief
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N1/00—Printing plates or foils; Materials therefor
- B41N1/003—Printing plates or foils; Materials therefor with ink abhesive means or abhesive forming means, such as abhesive siloxane or fluoro compounds, e.g. for dry lithographic printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/027—Thermal properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/12—Transfer pictures or the like, e.g. decalcomanias
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/40—Manufacture
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/40—Manufacture
- B42D25/45—Associating two or more layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
- B44C1/16—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like
- B44C1/165—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like for decalcomanias; sheet material therefor
- B44C1/17—Dry transfer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
- B44C1/16—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like
- B44C1/165—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like for decalcomanias; sheet material therefor
- B44C1/17—Dry transfer
- B44C1/1712—Decalcomanias applied under heat and pressure, e.g. provided with a heat activable adhesive
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/04—Homopolymers or copolymers of ethene
- C09J123/08—Copolymers of ethene
- C09J123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C09J123/0853—Vinylacetate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J167/00—Adhesives based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Adhesives based on derivatives of such polymers
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/416—Reflective
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/704—Crystalline
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2425/00—Cards, e.g. identity cards, credit cards
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
- C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J201/00—Adhesives based on unspecified macromolecular compounds
Definitions
- the present disclosure relates to a transfer foil, a security laminate including a part of the transfer foil, and a method for manufacturing the security laminate, and relates to authentication certification made of the security laminate.
- an authentication certificate for a card or passport a configuration is known in which a relief layer that expresses an optical effect such as diffraction is sandwiched between two laminates that form the outer shape of the authentication certificate.
- a transfer foil including a relief layer is prepared, and the relief layer is bonded to one laminate material.
- the two laminate materials and the relief layer are pressurized while being heated, thereby fusing the two laminate materials together.
- the security laminated body which integrated the laminated body can be used as authentication certification (for example, refer patent document 1).
- the relief layer located inside the security laminate may be damaged or deformed to the extent that it affects the optical effect of the relief layer compared to the relief layer located on the surface of the security laminate. Therefore, it is required to have a high melting point and high rigidity.
- the relief layer has a lower melting point and lower rigidity in order to increase the accuracy of the contour shape of the relief layer. Therefore, in the relief layer having the above-described high melting point and high rigidity, in the transfer of the relief layer, a part protruding from the outline of the transfer region or a missing part may occur, and the accuracy of the relief layer outline may be reduced. is there.
- the relief layer has the high melting point and the high rigidity as described above, the configuration in which the two laminate materials of the security laminate are bonded by an adhesive, and the relief layer is located on the surface of the security laminate. The same is required in the configuration. Or it is calculated
- the present disclosure relates to a transfer foil, a security laminate, and such a security laminate capable of increasing accuracy in the shape of the contour of a layer formed on a transfer target by transfer without reducing resistance to heat and pressure.
- An object of the present invention is to provide a method for manufacturing a body and to provide an authentication medium comprising a security laminate.
- a transfer foil for solving the above problems includes a film-like support and a layer-like transfer body having a pair of opposing surfaces and having an adhesive layer.
- the first surface of the pair of facing surfaces is in contact with the support body so as to be peelable from the support body, and the adhesive layer is provided so as to include the second surface of the pair of facing surfaces.
- the adhesive layer is a composite and includes a plurality of resin particles made of a first resin and a layered base material made of a second resin and filling a gap between the resin particles.
- the melting point of the second resin is lower than the melting point of the first resin.
- a security laminate for solving the above problems includes a first laminate material, a second laminate material, and the transfer body.
- the transfer body includes the first laminate material and the second laminate material. Located between.
- a manufacturing method of a security laminate for solving the above-mentioned problem is to form a transfer foil comprising a film-like support and a transfer body, the support having a support surface, and the transfer body is Including a close-up phrase layer, wherein the adhesive layer is formed on the support surface, the transfer body is transferred to a first laminate material, and the transfer body is formed by the first laminate material and the second laminate material. Adhering the first laminate material and the second laminate material in a sandwiched state.
- the adhesive layer is a composite, and includes a plurality of resin particles made of a first resin and a layered base material made of a second resin and filling a gap between the resin particles, and the melting point of the second resin is It is lower than the melting point of one resin.
- the layered base material is melted before the resin particles by heating the adhesive layer, so that the layer shape The viscosity of the base material is lower than the viscosity of the resin particles.
- the adhesive layer is pressed, the second resin constituting the layered base material is pushed out from the inside of the transfer region.
- the plurality of resin particles located inside the transfer region come into contact with each other, so that the plurality of resin particles adhere to each other, and at the boundary of the transfer region, for the second resin extruded from the transfer region,
- the plurality of resin particles are prevented from coming into contact with each other, and each resin particle tends to exist as an individual resin particle. And in the part containing several resin particle which exists separately in each contact bonding layer, cohesive failure occurs more easily than the part containing several resin particle mutually adhere
- the adhesive layer will be destroyed starting from the boundary of the transfer region, and the entire transfer member will be destroyed regardless of the melting point and rigidity of the layer included in the transfer member. This improves the accuracy of the shape of the contour of the layer formed on the transfer medium by transfer.
- the first resin is at least one of a modified polyolefin, a crystalline polyester, and an ethylene-vinyl acetate copolymer
- the second resin is an acrylic resin, an amorphous polyester, and It is preferably at least one of vinyl acetate-vinyl chloride copolymer.
- the transfer target is a laminate material included in the security laminate
- an adhesive layer having adhesion to the laminate material can be formed.
- the first resin is preferably a modified polyolefin or crystalline polyester
- the second resin is preferably an acrylic resin
- each of the modified polyolefin and the crystalline polyester has high solubility in a solution of a specific solvent, while having low solubility in a solution of other solvents. Therefore, resin grains are easily formed by using modified polyolefin or crystalline polyester as the first resin. In addition, since each of the modified polyolefin and the crystalline polyester has low compatibility with the acrylic resin, an adhesive layer including a plurality of resin particles and a layered base material is easily formed.
- the first resin is crystalline polyester and the second resin is an acrylic resin.
- the inventor of the present application shows that when the first resin is crystalline polyester and the second resin is an acrylic resin, the accuracy of the shape in the contour is greatly improved in the transferred body transferred to the transferred body. I found it. In this respect, according to the above configuration, the accuracy of the shape of the outline of the transfer body transferred to the transfer body can be greatly increased.
- the first resin is preferably a crystalline resin
- the second resin is preferably an amorphous resin
- the transfer body may include a relief surface having irregularities and a relief layer composed of an ultraviolet curable resin and an organosilicon compound.
- the organosilicon compound forms a siloxane bond in the relief layer, thermal shrinkage of the relief layer is suppressed, and cracks in the relief layer are suppressed.
- the transfer body includes a reflective layer, and the reflective layer covers at least a part of the relief surface and is made of aluminum or zinc sulfide.
- the organosilicon compound may include an amino group. Good.
- the transfer body includes a reflective layer, the reflective layer covers at least a part of the relief surface, and is made of aluminum or titanium dioxide.
- the organosilicon compound includes an acryl group or a methacryl group. May be included.
- the relief layer preferably has a melting point of 180 ° C. or higher. According to the said structure, even if the relief layer which a transcription
- Sectional drawing which shows the structure of the transfer foil in 1st Embodiment which actualized transfer foil.
- the partial expanded sectional view which expands and shows the area
- the partial enlarged plan view which expands and shows the partial structure of the contact bonding layer in transfer foil.
- the graph which shows the relationship between the temperature and viscosity in an example of 1st resin and an example of 2nd resin.
- Process drawing which shows the process of forming a peeling layer in a support body in the manufacturing method of transfer foil.
- Process drawing which shows the process of forming an adhesive layer in a peeling layer in the manufacturing method of transfer foil.
- Process drawing which shows the process of applying heat and pressure to a transfer foil in the state which made the transfer foil contact the to-be-transferred body.
- Process drawing which shows the process of transferring a transfer body to a to-be-transferred body.
- the top view which shows the structure of the contact bonding layer when heat and a pressure are applied to transfer foil.
- the perspective view which shows the structure of the contact bonding layer when a transcription
- the partial enlarged plan view which expands and shows the partial structure of an contact bonding layer.
- Sectional drawing which shows the structure of the transfer foil in 2nd Embodiment which actualized transfer foil.
- the top view which shows the structure of authentication certification. Sectional drawing which shows the structure which follows the II line
- Process drawing which shows the process of forming the precursor layer in 2nd Embodiment which actualized the manufacturing method of the security laminated body.
- Process drawing which shows the process of forming a relief layer.
- Process drawing which shows the process of forming a reflection layer.
- Process drawing which shows the process of transferring a transfer body to a to-be-transferred body.
- Process drawing which shows the process of integrating a to-be-transferred material, an upper side laminate material, a 1st lower side laminate material, and a 2nd lower side laminate material.
- FIGS. 2 shows a cross-sectional structure in which the region A in FIG. 1 is enlarged.
- the transfer foil 10 includes a film-like support 11 and a layer-like transfer body 12.
- the support 11 has a support surface 11S.
- the transfer body 12 is positioned on the support surface 11S in a state where it can be peeled off from the support surface 11S, and includes an adhesive layer 21.
- the adhesive layer 21 includes an adhesive surface 21S on the opposite side of the surface of the transfer body 12 that is in contact with the support surface 11S.
- the support 11 is composed of one support layer
- the transfer body 12 is composed of an adhesive layer 21 and a release layer 22.
- the release layer 22 includes a release surface 22S that contacts the support surface 11S
- the adhesive layer 21 includes an adhesive surface 21S that adheres to the transfer target.
- the adhesion between the layers is configured such that interface failure occurs between the support 11 and the release layer 22.
- the transfer foil 10 includes a film-like support 11 and a layer-like transfer body 12 having a pair of opposed surfaces and having an adhesive layer 21.
- the first surface of the pair of opposing surfaces is in contact with the support 11 so as to be peelable from the support 11.
- Adhesive layer 21 is provided so as to include the second surface of the pair of surfaces.
- the peeling surface 22S is an example of a first surface
- the bonding surface 21S is an example of a second surface.
- the support 11 is not limited to the configuration including only the support layer, and may have an intermediate layer positioned between the support layer and the release layer 22.
- the intermediate layer may be a layer that adjusts the ease of peeling of the transfer body 12 from the support 11.
- the transfer body 12 may have an intermediate layer located between the release layer 22 and the adhesive layer 21.
- the intermediate layer may be a colored layer. In this case, by transferring the transfer body 12 to the transfer body, the transfer body 12 showing information by the color of the intermediate layer can be formed on the transfer body.
- the thickness of the intermediate layer can be 0.5 ⁇ m or more and 5 ⁇ m or less.
- the adhesive layer 21 includes a plurality of resin particles 21a and a layered base material 21b that fills the gaps between the resin particles 21a.
- the adhesive layer 21 is a composite.
- the resin particles 21a are made of a first resin
- the layered base material 21b is made of a second resin having a melting point lower than that of the first resin.
- the first resin is preferably a crystalline resin.
- Examples of the crystalline resin include resins having a crystallinity of 5% or more.
- the second resin is preferably an amorphous resin.
- Non-crystalline resins include those having a crystallinity of less than 5%.
- the adhesive surface 21S of the bonding layer 21 is an uneven surface, and the adhesive surface 21S is composed of an outer surface of a part of the resin grains 21a and an outer surface of the layered base material 21b. Note that all of the plurality of resin particles 21a may be located inside the layered base material 21b. In other words, the entire bonding surface 21S of the adhesive layer 21 may be configured by the layered base material 21b.
- the plurality of resin particles 21 a are randomly located in the adhesive layer 21. In other words, the plurality of resin particles 21 a are positioned in an irregular state in the adhesive layer 21. The gap formed between the plurality of resin particles 21a is filled with the layered base material 21b.
- the plurality of resin particles 21a may include circular resin particles 21a whose cross-sectional shape along the thickness direction is circular, in other words, spherical resin particles 21a.
- the cross-sectional shape along the thickness direction is not limited to this, and the cross-sectional shape along the thickness direction is elliptical.
- the elliptical resin particle 21a or the cross-sectional shape along the thickness direction is a rhombus shape or a partial shape. May include an elliptical resin particle 21a. That is, each resin particle 21a is partly or entirely granular, and the shapes of the plurality of resin particles 21a may include a plurality of different shapes.
- the average diameter of the resin particles 21a is preferably 1 ⁇ m or more and 100 ⁇ m or less.
- the average value of the maximum width in the shape of the resin particles 21a when the resin particles 21a are projected on the surface observed in plan view is 1 ⁇ m or more. It is preferable that it is 100 micrometers or less.
- the adhesive layer 21 includes the plurality of resin particles 21a made of the first resin and the layered base material 21b made of the second resin.
- the first resin is preferably at least one of a modified polyolefin, a crystalline polyester, and an ethylene-vinyl acetate copolymer.
- the second resin is preferably at least one of an acrylic resin, an amorphous polyester, and a vinyl acetate-vinyl chloride copolymer.
- the first resin is preferably a modified polyolefin or crystalline polyester, and the second resin is preferably an acrylic resin.
- Each of the modified polyolefin and the crystalline polyester has a high solubility in a solution of a specific solvent, while having a low solubility in a solution of another solvent. Therefore, resin particles 21a are easily formed by using modified polyolefin or crystalline polyester as the first resin. In addition, since each of the modified polyolefin and the crystalline polyester has low compatibility with the acrylic resin, the adhesive layer 21 including the plurality of resin particles 21a and the layered base material 21b is easily formed.
- M2) is preferably included in the range of 3: 7 to 7: 3. That is, it is preferable that M1 / M2 is included in the range of 3/7 to 7/3.
- the adhesive layer 21 is a layer for attaching the transfer body 12 composed of the adhesive layer 21 and the release layer 22 to the transfer target.
- the thickness of the adhesive layer 21 is preferably 0.5 ⁇ m or more and 20 ⁇ m or less.
- the transfer material is formed of polyvinyl chloride (PVC), amorphous copolyester, and polycarbonate. It is preferable to select the transferred object. These transferred materials can be made into a laminate. Moreover, the transfer foil 10 can also be used for manufacturing bills, tags, labels, seals, and the like. At this time, paper or a plastic film is used as the transfer target.
- a thermoplastic resin can be used for the plastic film. Polyethylene terephthalate (PET) or polyolefin can be used as the thermoplastic resin. Examples of the polyolefin include polypropylene and polyethylene. Moreover, the film which extended
- the transfer foil 10 is 120 in order to prevent the transfer body 12 from being deformed by heat applied to the transfer body 12 when the transfer body 12 is transferred. It is preferable that the transfer is performed at a temperature of 0 ° C. or lower. Further, in order to suppress unintentional sticking of the transfer foil 10 while the transfer foil 10 is stored at room temperature, the adhesive layer 21 preferably exhibits adhesiveness at a transfer temperature of 80 ° C. or higher. Therefore, the melting point of the first resin is preferably 80 ° C. or higher and 120 ° C. or lower.
- the first resin is a modified polyolefin, a crystalline polyester, and an ethylene-vinyl acetate copolymer. Either is preferable.
- These resins are preferable in that they have higher adhesiveness to the above-described resin, which is a material for forming the transfer object, than other resins.
- the second resin is preferably any one of an acrylic resin, an amorphous polyester, and a vinyl acetate-vinyl chloride copolymer. These second resins are preferable in that they have lower adhesiveness than the above-described first resin with respect to the above-described transfer member forming material.
- the acrylic resin and vinyl acetate-vinyl chloride copolymer are generally non-crystalline. Examples of the acrylic resin include polymethyl methacrylate resin, urethane-modified acrylic resin, and epoxy-modified acrylic resin.
- non-crystalline polyester examples include a resin prepared by copolymerizing an aromatic dicarboxylic acid such as terephthalic acid or isophthalic acid with a diol component such as ethylene glycol or diethylene glycol to reduce crystallinity.
- a diol component such as ethylene glycol or diethylene glycol to reduce crystallinity.
- the vinyl acetate-vinyl chloride copolymer examples include those using hard vinyl chloride and soft vinyl chloride.
- the melting point of the second resin is, for example, 40 ° C. or higher and 70 ° C. or lower.
- first resin and the second resin have a difference in adhesive force with respect to the transfer target.
- the adhesive strength of the first resin to the transfer target is preferably 1.5 to 2 times the adhesive strength of the second resin to the transfer target.
- the average diameter of the resin particles 21a or the average value of the maximum width of the resin particles 21a is preferably 1 ⁇ m or more and 100 ⁇ m or less, and more preferably 5 ⁇ m or more and 20 ⁇ m or less.
- the average diameter of the resin particles 21a or the average value of the maximum width of the resin particles 21a is 1 ⁇ m or more, the accuracy of the contour shape of the layer formed by the transfer is easily increased.
- the average diameter of the resin particles 21a or the average value of the maximum width of the resin particles 21a is 100 ⁇ m or less, the resin particles 21a have a large adhesion force due to the large resin particles 21a. It is possible to suppress the lowering and the accuracy of the contour shape of the layer formed by the transfer.
- the ratio (M1: M2) of the mass (M1) of the first resin and the mass (M2) of the second resin is included in the range of 3: 7 to 7: 3. Is preferable, and it is more preferably included in the range of 5: 5 to 7: 3. That is, it is more preferable that M1 / M2 is included in the range of 5/5 to 7/3.
- the mass of the first resin and the mass of the second resin are included in the range of 5: 5 to 7: 3, so that the mass of the first resin is smaller than the mass of the second resin.
- the proportion of the granular first resin in the adhesive layer 21 is increased, so that cohesive failure in the adhesive layer 21 is likely to occur.
- the accuracy in the shape of the contour of the layer formed by transfer is likely to increase.
- the difference ⁇ between the melting point of the first resin and the melting point of the second resin is preferably 50 ° C. or higher and 100 ° C. or lower.
- the difference ⁇ between the melting point of the first resin and the melting point of the second resin is 50 ° C. or more, the effect of the particulate first resin and the layered second resin filling between the particles is easily obtained.
- the difference ⁇ between the melting point of the first resin and the melting point of the second resin is 100 ° C. or less, the first resin is easily melted, so that it is possible to suppress the adhesive force to the transfer target from being lowered.
- the first resin is a crystalline polyester and the second resin is an acrylic resin. More specifically, VYLON GM-920 (VYLON is a registered trademark) manufactured by Toyobo Co., Ltd. can be used as the first resin, and the melting point of VYLON GM-920 is 107 ° C.
- the second resin it is possible to use Dianal BR-102 (Dainal is a registered trademark) manufactured by Mitsubishi Rayon Co., Ltd., and the glass transition temperature of Dianar BR-102 is 20 ° C.
- the ratio of the mass of the first resin to the mass of the second resin is preferably 6: 4, for example.
- Polyester having a certain proportion of crystal state in which molecular chains are regularly arranged is called crystalline polyester.
- the ratio of the crystalline state of the crystalline polyester is at most 30% to 45%, preferably 5% or more.
- Polyester resins that tend to be in a crystalline state have structures such as nylon (PA), polyphenylene sulfide (PPS), polyacetal (POM), polyethylene (PE), polybutylene terephthalate (PBT), and polypropylene (PP).
- PA nylon
- PPS polyphenylene sulfide
- POM polyacetal
- PE polyethylene
- PBT polybutylene terephthalate
- PP polypropylene
- crystalline polyester not all parts have a crystal structure, and non-crystalline components are mixed at a certain ratio, so that a slightly turbid appearance tends to occur due to the difference in the refractive index of light.
- Examples of the crystalline polyester include VYLON GM-920 manufactured by Toyobo Co., Ltd
- the presence or crystallinity of the crystalline state can be determined by measurement with a differential scanning calorimeter (DSC).
- the differential scanning calorimeter (DSC) measures and compares the temperature of the reference material and the temperature of the sample while giving a constant heat to the reference material and the sample, and captures the thermal properties of the sample as a temperature difference. It is a device that measures endothermic reactions and exothermic reactions due to state changes. By measuring an endothermic peak accompanying melting of the crystal using a differential scanning calorimeter (DSC), the presence of the crystalline state in the sample can be confirmed.
- the heat of fusion can be obtained from the area of the endothermic peak, and the crystallinity can be derived from the heat of fusion.
- the melting point of the first resin and the second resin, the first embodiment, the layer used in the second embodiment described later, the resin used in the laminate material, and the material can be measured by a differential scanning calorimeter (DSC).
- FIG. 4 shows the relationship between temperature and viscosity in the first resin and the second resin.
- the first resin is an example of a modified polyolefin
- the second resin is an example of an acrylic resin.
- the second resin Since the melting point of the first resin is higher than the melting point of the second resin, the second resin changes from a solid state to a liquid state by melting at a lower temperature than the first resin. Thereby, compared with the viscosity of 1st resin, the viscosity of 2nd resin falls rapidly from the viscosity in solid to the viscosity in liquid at lower temperature.
- the viscosity of the second resin is lower than the viscosity of the first resin from 30 ° C. to 130 ° C.
- the difference between the viscosity of the second resin and the viscosity of the first resin is significant.
- the viscosity of the second resin is 100 dPa ⁇ s
- the viscosity of the first resin is 1400 dPa ⁇ s
- the viscosity of the first resin is 14 times the viscosity of the second resin.
- the adhesive layer 21 composed of the resin particles 21a and the layered base material 21b can be formed using the compatibility between the first resin and the second resin. That is, the adhesive layer 21 composed of the resin particles 21a and the layered base material 21b can be formed by mixing the first resin and the second resin which are incompatible resins with each other.
- the compatibility of the first resin and the second resin means that the solution in which the first resin is dissolved and the solution in which the second resin is dissolved are mixed in the transparent solution after mixing. It means that the property is the same as the transparency in the solution of each resin. Also, having compatibility means that in a dispersion in which a dispersion in which the first resin is dispersed and a dispersion in which the second resin is dispersed, the transparency in the dispersion after mixing is the dispersion of each resin. It means the same as transparency in.
- having compatibility means that the transparency of the solid obtained by drying the solvent in the mixed solution of the two solutions described above is the same as the transparency of each solution. Yes. Also, having compatibility means that the transparency of the solid obtained by drying the dispersion medium in the dispersion obtained by mixing the two dispersions described above is the same as the transparency of each dispersion. Means.
- a visual turbidity method may be used. It is preferable in terms of simplicity and high reliability. After visually determining that each solution or each dispersion before mixing is transparent, it is determined by visually determining whether the solution or dispersion after mixing is as transparent as before mixing. It can be determined whether two resins are compatible. Further, as an evaluation by measurement, the transmittance of the resin before and after mixing can be measured and compared. A microscope can be used to observe the compatible state.
- the resin layer after forming the resin layer by drying the mixed solution or dispersion, it is possible to visually determine whether the resin layer has the same transparency as the solution or dispersion before mixing. It can be determined whether the resin is compatible. In any case, when the solution or dispersion after mixing or the resin layer is as transparent as the solution or dispersion before mixing, it can be determined that the two resins are compatible. .
- the wavelength of visible light that is, about 500 nm is regarded as the minimum unit. Therefore, when the solution after mixing, the dispersion after mixing, or when these solids are transparent, the solution after mixing, the dispersion after mixing, and the scale above the wavelength of visible light, and It represents that the concentration and composition of these solids are uniform, in other words, compatible. On the other hand, when the solution after mixing, the dispersion after mixing, and these solids are opaque, the concentration and composition of the solution after mixing, the dispersion after mixing, and these solids are not uniform. In other words, it represents incompatibility.
- the compatibility of the two resins can be adjusted with reference to the average molecular weight, crystallinity, polarity, and solubility parameter of each resin.
- a resin having a high average molecular weight has a low dissolution rate
- a resin having a low average molecular weight has a high dissolution rate.
- the longer the molecular chain in other words, the greater the average molecular weight, the greater the attractive force between polymer molecules. Therefore, the higher the average molecular weight of the polymer molecule, the more difficult it is to disperse the polymer molecule in the solvent by untangling the molecular chain using the solvent molecule.
- the attractive force between polymer molecules increases as the surface where the two polymer molecules contact each other is larger. That is, the higher the orientation of the polymer molecules, in other words, the higher the crystallinity of the polymer molecules, the greater the attractive force between the polymer molecules. Therefore, in the case of a chain polymer resin, the higher the average molecular weight, in other words, the degree of polymerization, and the greater the proportion of the crystalline part contained in the chain polymer resin, the less likely the polymer resin will dissolve in the solvent. . If the first resin is an amorphous resin, it is difficult to dissolve in the solvent, and if the second resin is an amorphous resin, the first resin is easily soluble in the solvent. As a result, the amorphous first resin is likely to be granular, while the second resin is likely to be a layered base material.
- one reason for determining the compatibility between the two resins is the affinity between the solvent molecules and the resin.
- a polar polymer resin tends to be soluble in a polar solvent and difficult to dissolve in a non-polar solvent, whereas a non-polar polymer resin is easily soluble in a non-polar solvent and becomes a polar solvent. It tends to be difficult to melt.
- a solubility parameter (SP value) ⁇ is known as a factor for determining the strength of such affinity.
- the solubility parameter ⁇ is expressed by the following formula (1). In principle, the smaller the difference between the solubility parameter ⁇ value in the polymer resin and the solubility parameter ⁇ value in the solvent molecule, the solubility of the polymer resin in the solvent. Sexuality increases.
- ⁇ E is the evaporation energy and V is the molar volume.
- the values of the solubility parameter ⁇ in the resin and the solubility parameter ⁇ in the solvent are listed below.
- the value written in the drum after the name of the resin or solvent is the value of the solubility parameter ⁇ in each resin or solvent.
- Examples of the resin include polyvinyl acetate (9.1), acrylic resin (9.2), polyvinyl chloride (9.3), nitrocellulose (10.1), cellulose acetate (11), and cellulose diacetate (11 4) and the solubility parameter ⁇ in each of polystyrene (8.6-9.7) is known.
- solvent examples include cyclohexane (8.2), butyl acetate (8.5), toluene (8.9), ethyl acetate (9.1), methyl ethyl ketone (9.3), tetrahydrofuran (9.5), and acetone.
- solubility parameter ⁇ in each of (10), ethyl alcohol (12.7), and water (23.4) is known.
- a resin having a solubility parameter ⁇ having a small difference from the solubility parameter ⁇ of the solvent may be selected.
- a resin having a solubility parameter ⁇ having a large difference from the solubility parameter ⁇ of the solvent may be selected.
- the plurality of resin particles 21a formed from the first resin, the second resin, and the plurality of resins An adhesive layer 21 composed of a layered base material 21b filling a gap between the grains 21a can be formed.
- other methods can be used for forming the adhesive layer 21.
- each of the first resin and the second resin may have fluorescence.
- Fluorescence can be realized by adding a fluorescent material or having a fluorescent molecular structure in the molecule.
- Fluorescent materials include fluorescent pigments and fluorescent dyes. Thereby, the transfer state can be easily inspected by applying excitation light to the adhesive layer 21.
- the support 11 supports the transfer body 12 before being transferred to the transfer target.
- a plastic film can be used for the support 11, in other words, the support layer.
- a plastic film forming material polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polypropylene (PP), or the like can be used.
- PET polyethylene terephthalate
- PEN polyethylene naphthalate
- PP polypropylene
- the support 11, in other words, the support layer is typically a monolithic layer.
- the film forming material is preferably a material that is not easily deformed or altered by heat or pressure applied to the support 11 when the transfer body 12 is formed.
- paper, synthetic paper, plastic multilayer paper, resin-impregnated paper, and the like can be used in addition to the plastic film.
- the thickness of the support 11 is preferably 4 ⁇ m or more, and more preferably 12 ⁇ m or more and 50 ⁇ m or less. If the thickness of the support 11 is 4 ⁇ m or more, it is possible to prevent the support 11 from being difficult to handle because the physical strength of the support 11 is sufficient.
- the release layer 22 is a layer for positioning the transfer body 12 on the support surface 11 ⁇ / b> S of the support 11 in a state where the release from the support 11 is possible.
- the release layer 22 is prevented from being damaged by an external factor after being peeled from the support 11 and the transfer body 12 is transferred to the transfer target.
- Resin and lubricant can be used as the material for forming the release layer 22.
- a thermoplastic resin, a thermosetting resin, an ultraviolet curable resin, an electron beam curable resin, or the like can be used as the resin.
- an acrylic resin, a polyester resin, a polyamide resin, or the like can be used as the resin for forming the release layer 22.
- waxes such as polyethylene powder, paraffin wax, silicone, and carnauba wax can be used.
- the thickness of the release layer 22 is preferably 0.5 ⁇ m or more and 5 ⁇ m or less.
- the melting point of the release layer is typically 120 ° C. or higher and 150 ° C. or lower.
- the forming material of the release layer 22 may include a coloring material.
- the colorant include pigments and dyes.
- the pigment may be a pigment that emits fluorescence or phosphorescence.
- an inorganic pigment and an organic pigment are used for the pigment.
- the release layer 22 has a color, and the transfer body 12 that shows information by the color can be formed on the transfer body.
- the peeling layer 22 may contain a coloring material as a whole, or may have a coloring region containing a coloring material in part. There may be one colored region or two or more colored regions. The colored region can also indicate information by its contour shape. Further, two or more colored regions having different colors may be provided in the release layer 22.
- Paper or a plastic film can be used as a transfer target to which the transfer member of the transfer foil 10 is transferred.
- Plastic film forming materials include polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polypropylene (PP), polyvinyl chloride (PVC), amorphous copolyester (PET-G), and polycarbonate (PC). Etc. can be used.
- the thickness of the transfer object is preferably 50 ⁇ m or more and 500 ⁇ m or less, and more preferably 75 ⁇ m or more and 400 ⁇ m or less.
- the manufacturing method of the security laminate includes forming the transfer foil 10 by forming the transfer body 12 including the adhesive layer 21 on the support surface 11S of the film-like support 11, and transferring the transfer body 12 of the transfer foil 10 first. 1 transferring to a laminate material.
- the formation of the transfer foil 10 is lower than the first resin, and the adhesive layer 21 includes an adhesive surface 21S opposite to the surface in contact with the support surface 11S, and includes a plurality of resin particles 21a including the first resin. It includes forming the adhesive layer 21 so that the adhesive layer 21 includes a layered base material 21b that includes a second resin having a melting point and fills the gaps between the resin grains 21a.
- the manufacturing method of the security laminate is to form the transfer foil 10 including the layered support 11 and the transfer body 12, and the support 11 has the support surface 11S, and the transfer body 12 is bonded.
- the adhesive layer 21 includes being formed on the support surface 11S.
- the method for manufacturing the security laminate includes transferring the transfer body 12 to the first laminate material, and sandwiching the transfer body 12 between the first laminate material and the second laminate material. Adhering the laminate material.
- the adhesive layer 21 includes a plurality of resin particles made of the first resin and a layered base material 21b made of the second resin and filling the gaps between the resin particles 21a.
- the melting point of the second resin is that of the first resin. Below the melting point.
- the adhesive layer 21 is a composite.
- the support 11 is prepared, and the release layer 22 is formed on the support surface 11 ⁇ / b> S of the support 11.
- Printing or coating is used to form the release layer 22.
- gravure printing can be used, and as coating, gravure coating, microgravure coating, die coating, and the like can be used.
- an intermediate layer can be formed.
- the adhesive layer 21 having the adhesive surface 21 ⁇ / b> S is formed on the surface of the release layer 22 opposite to the release surface 22 ⁇ / b> S in contact with the support surface 11 ⁇ / b> S of the support 11.
- printing or coating is used for the formation of the adhesive layer 21.
- printing gravure printing, flexographic printing, screen printing, offset printing, and the like can be used.
- coating gravure coating, micro gravure coating, lip coating and the like can be used. Thereby, the transfer foil 10 having the support 11 and the transfer body 12 can be obtained.
- a transfer target 31 that is an example of a first laminate material is prepared.
- the transfer body 31 has a transfer surface 31S to which the transfer body 12 of the transfer foil 10 is transferred. Heat and pressure are applied from the support 11 of the transfer foil 10 toward the transfer body 12 in a state in which the transfer surface 31S of the transfer body 31 is in contact with the adhesive surface 21S of the adhesive layer 21.
- the hot stamp H is brought into contact with the surface of the support 11 opposite to the support surface 11S, and heat and force in the direction from the support 11 to the transfer body 12 are applied to the transfer foil 10 by the hot stamp H. .
- heat and pressure are applied to a portion of the transfer foil 10 that overlaps with the hot stamp H in a plan view facing the transfer surface 31S of the transfer body 31.
- a portion of the transfer foil 10 to which heat and pressure are applied is the transfer target 10T, and a portion of the adhesive layer 21 included in the transfer target 10T is a transfer region 21T.
- the transfer body 12 may include information for authenticating the owner of the security laminate 30 by having a shape indicating an image or a character.
- the transfer target 31 may include information for authenticating the owner of the security laminate 30.
- FIG. 11 shows a planar structure in which the region B in FIG. 9 is enlarged.
- the second resin having a reduced viscosity is pushed out from the inside of the transfer region 21T, while the resin particles 21a formed of the first resin. Remains inside the transfer region 21T.
- the ratio of the second resin outside the edge of the transfer region 21T is larger than the ratio of the second resin inside the transfer region 21T.
- the second resin is pushed out of the transfer region 21T, the plurality of resin particles 21a come into contact with each other, and heat and pressure are applied to the plurality of resin particles 21a.
- the plurality of resin particles 21a adhere to each other.
- the plurality of resin particles 21a located inside the transfer region 21T form a film-like lump 21c, and the film-like lump 21c expresses an adhesive force to the transfer target 31 in the transfer region 21T.
- the low-viscosity second resin extruded from the transfer region 21T is located outside the edge of the transfer region 21T.
- the plurality of resin particles 21a are unlikely to contact each other outside the edge of the transfer region 21T. Therefore, the plurality of resin particles 21a located in the vicinity of the transfer region 21T can be prevented from adhering to each other due to heat and pressure applied to the transfer region 21T. That is, each resin particle 21a is in a state of being separated from the other resin particles 21a and kept in a granular shape.
- the breaking strength inside the transfer region 21T and the breaking strength outside the edge of the transfer region 21T are greatly different. In other words, cohesive failure does not easily occur inside the transfer region 21T, but cohesive failure tends to occur outside the transfer region 21T.
- the layer transferred to the transfer medium causes flash and shading.
- the flash is an extra portion that protrudes outward from the contour of the transfer region
- the hook is a portion that is recessed inward from the contour of the transfer region. In other words, the accuracy of the shape of the contour of the layer transferred to the transfer medium is lowered.
- the adhesive layer 21 composed of the plurality of resin particles 21a and the layered base material 21b, for the reasons described above, it is assumed that the frequency of occurrence of burrs and burrs is reduced and burrs and burrs are temporarily generated Also, these sizes can be made smaller. In other words, it is possible to improve the accuracy of the shape of the outline of the layer transferred to the transfer target.
- Example 1 A PET film having a thickness of 25 ⁇ m (manufactured by Toray Industries, Inc., Lumirror 25T60) (Lumorer is a registered trademark) is prepared as a support, and using a gravure, a release layer ink having the following composition is formed to a thickness of 1 ⁇ m. And applied to the support surface of the support.
- the adhesive layer ink having the following composition was applied to the release layer with a thickness of 4 ⁇ m using a gravure.
- the first resin for forming the resin grains was made of crystalline polyester
- the second resin for forming the layered base material was made of an acrylic resin.
- the ratio of the mass of the first resin to the mass of the second resin was 1: 9.
- the average value of the maximum width in the resin grains was 10 ⁇ m.
- the ink for adhesive layers was obtained by mixing the dispersion liquid in which the some resin particle comprised from 1st resin disperse
- [Ink for adhesive layer] [Resin grain] Crystalline polyester (Toyobo Co., Ltd., VYLON GM-920) Methyl ethyl ketone (Toyo Ink Co., Ltd., VC102) [Layered base material] Acrylic resin (Mitsubishi Rayon Co., Ltd., Dianar BR-102) Toluene (Toyo Ink Co., Ltd., PD102)
- Example 2 A transfer foil of Example 2 was obtained using the same method as Example 1 except that the ratio of the mass of the first resin to the mass of the second resin in the adhesive layer was changed to 3: 7.
- Example 3 A transfer foil of Example 3 was obtained using the same method as Example 1 except that the ratio of the mass of the first resin to the mass of the second resin in the adhesive layer was changed to 5: 5.
- Example 4 A transfer foil of Example 4 was obtained using the same method as Example 1 except that the ratio of the mass of the first resin to the mass of the second resin in the adhesive layer was changed to 7: 3.
- Example 5 A transfer foil of Example 5 was obtained using the same method as Example 1 except that the ratio of the mass of the first resin and the mass of the second resin in the adhesive layer was changed to 9: 1.
- Comparative Example 1 A transfer foil of Comparative Example 1 was obtained using the same method as in Example 1 except that a crystalline adhesive layer (same as in Example 1) was used as the resin and a layered adhesive layer was formed.
- Comparative Example 2 A transfer foil of Comparative Example 2 was obtained using the same method as Example 1 except that a layered adhesive layer was formed using only an acrylic resin (same as Example 1) as the resin.
- Comparative Example 3 A transfer foil of Comparative Example 3 using the same method as Example 1 except that a layered adhesive layer was formed using only urethane resin (Nipporan 5196 manufactured by Tosoh Corporation) (Nipporan is a registered trademark) as a resin. Got.
- the adhesive layer ink having the following composition was used as the adhesive layer ink.
- a transfer object having a thickness of 100 ⁇ m (manufactured by SABIC, LEXAN SD8B94) (LEXAN is a registered trademark) was prepared, and the transfer body of each transfer foil was transferred using a hot stamp transfer machine. At this time, the transfer temperature was set to 120 ° C., the pressure was set to 200 kg / cm 2 , and the transfer time was set to 1 second.
- the adhesive layer 21 having adhesiveness to the laminate material can be formed.
- the ratio of the mass of the first resin to the mass of the second resin in the adhesive layer 21 is from 3: 7 to 7 : 3, the accuracy of the shape of the contour of the transfer body 12 transferred to the transfer body 31 can be greatly increased.
- a second embodiment of the transfer foil, the security laminate, and the method for manufacturing the security laminate will be described with reference to FIGS.
- the second embodiment is different from the first embodiment in that the transfer foil has a relief layer and a reflective layer. Therefore, in the following, such differences will be described in detail, and in the second embodiment, the same reference numerals are given to configurations common to the first embodiment, and detailed description thereof will be omitted.
- the structure of the transfer foil, the structure of the security laminate, the material for forming each layer constituting the security laminate, the method for producing an authentication certificate comprising the security laminate, and the test example will be described in order.
- the configuration of the transfer foil will be described with reference to FIG.
- the transfer foil 40 includes a support 11 and a transfer body 41.
- the transfer body 41 includes an adhesive layer 21 and a release layer 22, and further includes a relief layer 51 and a reflective layer 52.
- the release layer 22, the relief layer 51, the reflective layer 52, and the adhesive layer 21 are stacked in this order.
- the relief layer 51 includes a relief surface 51S having irregularities and is composed of an ultraviolet curable resin and an organosilicon compound.
- the ratio (M3: M4) of the mass (M3) of the ultraviolet curable resin and the mass (M4) of the organosilicon compound is preferably included in the range of 3: 7 to 9: 1. That is, it is preferable that M3 / M4 is included in the range of 3/7 to 9/1.
- the reflective layer 52 covers the entire relief surface 51S, but it is only necessary to cover at least a part of the relief surface 51S.
- the material for forming the reflective layer 52 is preferably aluminum, zinc sulfide, or titanium dioxide.
- the organosilicon compound preferably contains an amino group.
- the material for forming the reflective layer 52 is aluminum or titanium dioxide, the organosilicon compound preferably contains an acryl group or a methacryl group.
- the ratio (M3: M4) of the mass (M3) of the ultraviolet curable resin and the mass (M4) of the organosilicon compound may be included in the range of 3: 7 to 7: 3. preferable. That is, it is preferable that M3 / M4 is included in the range of 3/7 to 7/3.
- the melting point of the relief layer 51 is preferably 180 ° C. or higher.
- the reflective layer 52 may be omitted. Even in such a configuration, it is sufficient that the relief layer 51 and the adhesive layer 21 have different refractive indexes, and light is reflected on the relief surface 51S of the relief layer 51 by the difference in refractive index between the two layers. Can be generated.
- the authentication certificate 60 is composed of a security laminate.
- the authentication certificate 60 is typically a card as shown in FIG. Another form is a booklet page consisting of a security stack. Examples of the card authentication certificate 60 include an ID card, a credit card, a license card, and a point card.
- the booklet includes passports and visas.
- the authentication certificate 60 can be used as a page where booklet authentication information is recorded.
- the authentication certificate 60 includes a plurality of information.
- the information included in the authentication certificate 60 includes a name 60A of the authentication certificate 60, an image 60B, and a character string 60C.
- the authentication certificate 60 includes the transfer body 41 of the transfer foil 40 described above.
- Image 60B is a face image of the owner of authentication certificate 60.
- the character string 60C is personal information of the owner of the authentication certificate 60, and includes, for example, nationality, name, date of birth, and personal number.
- the character string 60C includes a type 60C1 in personal information and unique information 60C2 unique to the owner of the authentication certificate 60.
- the image 60B included in the authentication certificate 60 may be an image other than the face image of the owner, and the character string 60C may be information different from the personal information described above.
- the authentication certificate 60 includes a transfer target 61 that is an example of a first laminate material, and an upper laminate material 62 that is an example of a second laminate material.
- the authentication certificate 60 also includes a transfer body 41 positioned between the transfer body 61 and the upper laminate material 62.
- the authentication certificate 60 includes a first lower laminate material 63 and a second lower laminate material 64.
- the first lower laminate material 63, the second lower laminate material 64, the transfer object 61, and the upper laminate material 62 are stacked in this order.
- the first lower laminate material 63, the transfer target 61, and the upper laminate material 62 are, for example, transparent, and the second lower laminate material 64 is, for example, white.
- the transfer body 41 is positioned on the transfer surface 61S of the transfer body 61, and the entire transfer body 41 is covered with the upper laminate material 62.
- the transfer target 61 has a characteristic of being discolored by irradiation with a laser beam, and includes an irradiated region 61a that is a portion discolored by irradiation with the laser beam.
- the surface in contact with the transfer body 61 is a print surface 64S, and the print surface 64S has a print 65 formed using a printing method.
- the name 60A of the authentication certificate 60 and the type 60C1 in the personal information in the character string 60C are information included in the print 65.
- the unique information 60C2 in the image 60B and the character string 60C is information included in the irradiated region 61a.
- the relief layer 51 is a layer having a relief surface 51S including a relief structure having an optical effect.
- An ultraviolet curable resin can be used as a material for forming the relief layer.
- examples of the ultraviolet light-curable resin include monomers, oligomers, and polymers having an ethylenically unsaturated bond or an ethylenically unsaturated group.
- Monomers include 1,6-hexanediol, neopentyl glycol diacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, and dipentaerythritol hexaacrylate.
- Examples of the oligomer include epoxy acrylate, urethane acrylate, and polyester acrylate.
- Examples of the polymer include a urethane-modified acrylic resin and an epoxy-modified acrylic resin.
- thermoplastic resin examples include an acrylic resin, an epoxy resin, a cellulose resin, and a vinyl resin.
- thermosetting resin examples include a urethane resin, a melamine resin, an epoxy resin, and a phenol resin.
- the forming material of the relief layer 51 preferably contains an ultraviolet curable resin among the above-described resins.
- the material for forming the relief layer 51 preferably includes at least one ultraviolet curable resin selected from the group consisting of a monomer, a polyfunctional monomer, and a polyfunctional oligomer.
- the forming material of the relief layer 51 contains an organosilicon compound.
- the organosilicon compound has a functional group that is reactive to an organic substance in one molecule and binds to the organic substance, and a functional group that is reactive to an inorganic substance and binds to the inorganic substance. Is preferred.
- the ratio of the mass of the ultraviolet curable resin to the mass of the organosilicon compound is preferably included in the range of 3: 7 to 9: 1.
- a layer formed using the ultraviolet curable resin can be imparted with high heat resistance relatively easily.
- a layer formed using the ultraviolet curable resin can be given high heat resistance, and at the same time, is often given high rigidity and high toughness. . Therefore, when the layer formed using the ultraviolet curable resin is transferred to the transfer target body together with the adhesive layer as a part of the transfer body, the above-described flash and overburden are likely to occur, and among the layers formed by transfer, The accuracy in the contour shape of the layer containing the ultraviolet curable resin tends to be low.
- the volume of the ultraviolet curable resin When the ultraviolet curable resin is cured, the volume of the ultraviolet curable resin generally shrinks not a little. Such shrinkage is caused by the portion of the relief layer 51 that is uncured after the irradiation of the ultraviolet rays, the transferred object 61, the upper laminate material 62, the first lower laminate material 63, and the second lower laminate material 64. It is also caused by curing by heat and pressure applied in the integration process. The volume shrinkage in the relief layer 51 tends to cause the relief layer 51 to break.
- organosilicon compounds an organosilicon compound having a functional group that reacts with an organic substance to bind to the organic substance and a functional group that reacts with the inorganic substance to bind to the inorganic substance in one molecule is called a silane coupling agent. It is.
- the silane coupling agent contains silicon, a functional group having reactivity with organic substances, and a functional group having reactivity with inorganic substances in one molecule.
- the functional group having reactivity with an organic substance include an amino group, an epoxy group, a methacryl group, a vinyl group, and a mercapto group.
- the functional group having reactivity with the inorganic substance is a hydrolyzable atomic group and includes, for example, oxygen and hydrocarbons. In one molecule of the silane coupling agent, these two functional groups are each bonded to silicon.
- the organosilicon compounds are bonded to each other by a silanol dehydration condensation reaction after hydrolysis to form a siloxane bond.
- the siloxane bond Compared with the carbon-carbon bond which is the main skeleton of the polymer constituting the plastic, the siloxane bond has a high bond energy and is stable.
- the siloxane bond is easy to rotate in the siloxane bond because the bond distance is longer and the electron density is lower than the carbon-carbon bond, and the rotational energy of the siloxane bond is almost zero.
- the flexibility of the siloxane bond is very high.
- the ultraviolet curable resin is maintained while maintaining the high heat resistance of the ultraviolet curable resin. It is possible to reduce the rigidity and toughness of the resin and to reduce the shrinkage due to the curing of the ultraviolet curable resin.
- the ratio of the mass of the ultraviolet curable resin to the mass of the organosilicon compound is preferably included in the range of 3: 7 to 9: 1.
- the mass of the organosilicon compound is 70% or less, the ratio of the ultraviolet curable resin in the relief layer 51 is reduced, so that the rigidity and toughness are lowered, thereby suppressing the occurrence of cracks in the relief layer 51.
- the above-described ultraviolet curable resin having high heat resistance often tends to have low adhesion to the forming material of the reflective layer 52 in a state after curing.
- the ultraviolet curable resin that tends to have high adhesion to the forming material of the reflective layer 52 has low heat resistance, and therefore, the transfer body 61, the upper laminate material 62, and the first lower laminate material 63. It is difficult to have sufficient resistance to heat and pressure applied in the process of integrating the second lower laminate material 64.
- the above-described organosilicon compound can enhance the adhesion between the ultraviolet curable resin and the material for forming the reflective layer 52 by the functional group contained in the organosilicon compound.
- the material for forming the reflective layer 52 is aluminum or zinc sulfide
- the adhesion between the relief layer 51 and the reflective layer 52 can be enhanced by the amino group containing the amino group.
- the material for forming the reflective layer 52 is aluminum or titanium dioxide
- the adhesion between the relief layer 51 and the reflective layer 52 can be increased by the organic silicon compound containing an acryl group or a methacryl group.
- the ratio (M3: M4) of the mass (M3) of the ultraviolet curable resin to the mass (M4) of the treeed silicon compound is included in the range of 3: 7 to 7: 3. Is preferred. That is, it is preferable that M3 / M4 is included in the range of 3/7 to 7/3.
- the adhesion between the reflective layer 52 and the relief layer 51 is improved by the mass of the organosilicon compound being 30% or more. Can be increased. Thereby, it is possible to satisfy both the suppression of the destruction of the relief layer 51 and the enhancement of the adhesion between the relief layer 51 and the reflection layer 52.
- the melting point of the relief layer 51 is preferably 180 ° C. or higher, and more preferably 200 ° C. or higher.
- the relief layer 51 may not have a melting point.
- the heat and pressure applied in the process of integrating the transferred object 61, the upper laminate material 62, the first lower laminate material 63, and the second lower laminate material 64 Sufficient resistance.
- the melting point is 200 ° C. or higher, in the step of integrating the transfer body 61, the upper laminate material 62, the first lower laminate material 63, and the second lower laminate material 64, the relief surface 51S is integrated. Damage and deformation are more reliably suppressed.
- the relief surface 51S includes fine unevenness, and the unevenness causes light to diffract, suppresses light reflection, emits isotropic or anisotropic diffused light, and converges or diverges light. What is necessary is just to be comprised so that it may have a shape which has either the property as a lens, or the property which selectively reflects only predetermined polarized light.
- the relief surface 51S may include two or more unevennesses having shapes having different properties from each other.
- the thickness of the relief layer 51 can be 1 ⁇ m or more and 25 ⁇ m or less.
- the unevenness of the relief surface 51S has a property of diffracting light by providing a region having a diffraction grating structure with a pitch of 0.5 to 2 ⁇ m and a depth of 0.05 to 0.5 ⁇ m, for example.
- the unevenness has a property of suppressing light reflection by a moth-eye structure or a deep lattice structure, for example, with a pitch of 0.1 ⁇ m to 0.5 ⁇ m and a depth of 0.25 ⁇ m to 0.75 ⁇ m.
- the unevenness isotropic It has the property of emitting diffuse or anisotropic diffused light.
- the height or depth (b) is 0.1 ⁇ m or more and 10 ⁇ m or less, and the ratio of the height or depth (b) to the pitch (a), that is, the aspect ratio (b / a) is 0.3 or more.
- the unevenness has a property as a lens for converging or diverging light.
- the unevenness can selectively reflect only predetermined polarized light.
- the relief layer 51 may include one of the above-described structures, may include one type of structure as a plurality of regions, or may include a plurality of types of structures as a plurality of regions.
- the second resin has a low melting point and easily increases the fluidity by heating, so that the adhesive layer tends to adhere along the unevenness of the relief surface 51S.
- the relief surface 51S may have a region without unevenness. A region having no unevenness has a property that it is difficult for stress to concentrate when an external force for peeling the adhesive layer is generated, and it is difficult to peel off. Therefore, an anchor effect that prevents the transfer region from peeling off can be expected in a region where the relief surface 51S is not uneven.
- the optical effect of the relief surface 51S may be recognized visually or may be detected by a device. According to the relief surface 51S, forgery or falsification of the authentication certificate 60 including the relief layer 51 can be suppressed, or the design can be improved.
- the reflective layer 52 is a layer for increasing the optical effect of the relief structure formed on the relief surface 51S to such an extent that it can be easily visually recognized.
- the material for forming the reflective layer 52 is preferably aluminum, zinc sulfide, or titanium dioxide.
- aluminum is preferable because it is inexpensive, can provide a highly glossy opaque film, and is easy to handle.
- Zinc sulfide and titanium dioxide are preferable in that they have a high refractive index in visible light, so that the reflectance in visible light is easily increased and processing is easy.
- the reflective layer is a single layer or a multilayer.
- the reflective layer is generally formed by one or many depositions, CVD, and sputtering.
- the thickness of the reflective layer 52 can be 10 nm or more and 500 nm or less.
- the reflective layer 52 may be located on the entire relief surface 51S or may be located on a part of the relief surface 51S.
- the reflective layer 52 preferably has a shape showing a specific character or pattern in a plan view facing the relief surface 51S.
- various kinds of resins include an energy absorber that absorbs a laser beam, a heat-sensitive color change material, that is, a material having a characteristic of changing from a first color to a second color by heat.
- the material added to can be used.
- various resins PET, PEN, PP, PVC, PET-G, PC, and the like can be used.
- LEXAN SD8B94 manufactured by SABIC can be used as the transfer object 61.
- the thickness of the transfer body 61 is preferably 50 ⁇ m or more and 500 ⁇ m or less, and more preferably 75 ⁇ m or more and 400 ⁇ m or less.
- a plastic film can be used for the upper laminate material 62, the first lower laminate material 63, and the second lower laminate material 64.
- PET, PEN, PP, PVC, PET-G, PC, or the like can be used as a material for forming each laminate material.
- a plastic film formed from any one of PVC, PET-G, and PC is usually used as a laminating material for various cards or a laminating material for a passport.
- These plastic films are preferable in that they can be easily integrated by heat or pressure.
- the thickness of each laminate material is preferably 50 ⁇ m or more and 500 ⁇ m or less, and more preferably 75 ⁇ m or more and 400 ⁇ m or less.
- the thickness of each laminate material is 50 ⁇ m or more, it is suppressed that the physical strength of each laminate material is insufficient, thereby suppressing the difficulty of handling each laminate material, and printing. When forming 65, wrinkles are less likely to occur in the laminate material.
- the thickness of each laminate material is 500 ⁇ m or less, it is possible to suppress variations and deflections in the thickness of each laminate material from affecting the accuracy of processing in each process for manufacturing the certification certificate 60.
- the melting point of each laminate material is preferably 120 ° C. or higher and 250 ° C. or lower.
- the laminate material described above is also used for the security laminate 30 of the first embodiment.
- the print 65 has a function of giving the above-described various information to the authentication certificate 60.
- the print 65 may have a color, and the print 65 only needs to have a shape corresponding to information desired to be given to the authentication certificate 60.
- the printing 65 is formed using ink, for example.
- ink for forming the print 65 offset ink, letterpress ink, gravure ink, and the like can be used according to the printing method.
- resin ink, oil-based ink, water-based ink, etc. can be used for ink according to an ink composition.
- an oxidation polymerization type ink, a penetrating drying type ink, an evaporation drying type ink, an ultraviolet curable ink, or the like can be used according to the drying method.
- the print 65 can be shaped according to information using halftone dots and lines.
- the print 65 can be formed by gravure printing, offset printing, gravure offset printing, screen printing, flexographic printing, or the like.
- a functional ink may be used as the ink.
- the printing 65 can be used depending on the angle at which light is illuminated on the printing 65 or the angle at which the printing 65 is visually recognized.
- the color changes As the functional ink, an optical change ink (Optical / Variable / Ink), a color shift ink, a pearl ink, or the like can be used.
- the printing 65 may be formed by an electrophotographic method using toner.
- a toner is prepared in which particles having colors such as graphite and pigment are attached to charged plastic particles.
- the toner is transferred to the substrate by using static electricity of the plastic particles. By heating the transferred toner, the toner is fixed on the substrate. Thereby, the print 65 can be formed.
- the transfer body 41 including the adhesive layer 21 is formed on the support surface 11S of the film-like support body 11 to form the transfer foil 40, and the transfer body 41 of the transfer foil 40 is first used.
- a transfer body 61 which is an example of a laminate material.
- the transfer body 41 is sandwiched between the transfer body 61 and the upper laminate material 62 by superimposing the upper laminate material 62, which is an example of the second laminate material, on the transfer body 61. And adhering the transfer body 61 and the upper laminate material 62 to each other.
- Forming the transfer foil 40 includes forming the adhesive layer 21.
- the adhesive layer 21 includes an adhesive surface 21S opposite to the surface in contact with the support surface 11S, and a plurality of resin particles 21a including the first resin are lower than the first resin.
- the adhesive layer 21 is formed so that the adhesive layer 21 includes a layered base material 21b having a layer shape that includes a second resin having a melting point and fills a gap between the resin grains 21a.
- the surface opposite to the release surface 22S of the release layer 22 is formed.
- a precursor layer 51A of the relief layer 51 is formed.
- Printing or coating is used to form the precursor layer 51A.
- gravure printing can be used.
- coating gravure coating, microgravure coating, or the like can be used.
- the thickness of 51 A of precursor layers can be 1 micrometer or more and 25 micrometers or less.
- a stamper for forming the relief surface 51 ⁇ / b> S is pressed against the surface of the precursor layer 51 ⁇ / b> A before curing on the surface opposite to the surface in contact with the release layer 22. Then, the precursor layer 51A is irradiated with ultraviolet rays in a state where the stamper is pressed against the precursor layer 51A or after the stamper is separated from the precursor layer 51A. Thereby, the relief layer 51 having the relief surface 51S can be obtained.
- the reflective layer 52 is formed on the entire relief surface 51S.
- a vacuum deposition method, a sputtering method, or the like can be used as a method for forming the reflective layer 52.
- the reflective layer 52 located on a part of the relief surface 51S can be formed using the following method. A soluble resin is applied to a portion of the relief surface 51S where the reflective layer 52 is not positioned, and then a reflective layer is formed on the entire relief surface 51S. Next, by removing the soluble resin and the reflective layer formed on the soluble resin by washing, the reflective layer can be formed on a part of the relief surface 51S.
- the material for forming the reflective layer is aluminum
- an acid-resistant resin or an acid-resistant resin is formed on the portion of the aluminum thin film that is positioned on the relief surface 51S.
- the reflective layer can be positioned on a part of the relief surface 51S by etching the aluminum thin film with acid or alkali.
- a resin whose solubility is changed by light exposure is applied to the entire relief surface 51S. Then, the resin is exposed to the portion of the relief surface 51S where the reflective layer is located using a mask. Next, the reflective layer can be positioned on a part of the relief surface 51S by etching the reflective layer and washing the resin remaining on the reflective layer.
- the transfer surface of the transfer body 61 is transferred in the same manner as in the first embodiment.
- the transfer body 41 of the transfer foil 40 is transferred to 61S.
- an upper laminate material 62, a first lower laminate material 63, and a second lower laminate material 64 are prepared. Then, the transfer body 61 including the transfer body 41 is sandwiched between the upper laminate material 62 and the second lower laminate material 64, and the first lower laminate material 63 is in contact with the second lower laminate material 64. The transfer body 61, the upper laminate material 62, the first lower laminate material 63, and the second lower laminate material 64 are laminated. As a result, the transfer target 61, the upper laminate material 62, the first lower laminate material 63, and the second lower laminate material 64 are fused together. That is, the transfer body 61 and the upper laminate material 62 are fused while the transfer body 41 is sandwiched between the transfer body 61 and the upper laminate material 62. As a result, the authentication certificate 60 described above with reference to FIG. 14 can be obtained. As described above, the authentication certificate 60 for the page of the card or booklet can be obtained.
- the transfer object 61, the upper laminate material 62, the first lower laminate material 63, and the second lower laminate material 64 the transfer object 61 and the upper laminate material 62 and the transferred object 61 and the first laminate material 62, respectively.
- An adhesive may be positioned between the lower laminate material 64 and between the second lower laminate material 64 and the first lower laminate material 63. That is, the transfer target 61, the upper laminate material 62, the first lower laminate material 63, and the second lower laminate material 64 may be integrated by bonding using an adhesive.
- the transfer body 41 After transferring the transfer body 41 to the transfer body 61 and integrating the transfer body 61, the upper laminate material 62, the first lower laminate material 63, and the second lower laminate material 64, the transfer body 41
- the irradiated region 61a can be formed by irradiating 61 with a laser beam. Further, before the transfer body 61, the upper laminate material 62, the first lower laminate material 63, and the second lower laminate material 64 are integrated, printing is performed on the printing surface 64S of the second lower laminate material 64. 65 can be formed.
- a metal cylindrical plate for forming a relief surface was pressed against the precursor layer to perform roll forming.
- the press pressure was set to 2 kg / cm 2
- the press temperature was set to 240 ° C.
- the press speed was set to 10 m / min.
- the relief layer was formed by irradiating the precursor layer with ultraviolet light having a wavelength of 365 nm after the roll forming and curing the ultraviolet curable resin.
- the transfer foil of Test Example 1 was obtained by forming an adhesive layer on the relief surface of the relief layer using the same method as in Example 3.
- UV curable resin having ethylenically unsaturated group Organosilicon compound (Shin-Etsu Chemical Co., Ltd., KBM-503) Methyl ethyl ketone (Toyo Ink Co., Ltd., VC102)
- the transfer body provided in the transfer foil was transferred to the transfer target (same as Example 1) under the same conditions as in Example 1. Then, an upper laminate material having a thickness of 100 ⁇ m (SABIC, LEXAN SD8B14), a first lower laminate material having a thickness of 100 ⁇ m (the same as the upper laminate material), and a second lower laminate having a thickness of 400 ⁇ m. A material (manufactured by SABIC, LEXAN SD8B24) was prepared.
- Test Example 2 A security laminate of Test Example 2 was obtained using the same method as Test Example 1 except that the ratio of the mass of the ultraviolet curable resin to the mass of the organosilicon compound in the relief layer was changed to 7: 3.
- Test Example 3 A security laminate of Test Example 3 was obtained using the same method as Test Example 1 except that the ratio of the mass of the ultraviolet curable resin to the mass of the organosilicon compound in the relief layer was changed to 5: 5.
- Test Example 4 A security laminate of Test Example 4 was obtained using the same method as Test Example 1, except that the ratio of the mass of the ultraviolet curable resin to the mass of the organosilicon compound in the relief layer was changed to 3: 7.
- Test Example 5 A security laminate of Test Example 5 was obtained using the same method as Test Example 1 except that no organosilicon compound was used as the relief layer forming material.
- Test Example 6 A security laminate of Test Example 6 was obtained using the same method as Test Example 1 except that an ultraviolet curable resin was not used as the material for forming the relief layer.
- Test Example 7 A security laminate of Test Example 7 was obtained using the same method as Test Example 1 except that the ratio of the mass of the ultraviolet curable resin to the mass of the organosilicon compound in the relief layer was changed to 1: 9.
- Test Example 8 A security laminate of Test Example 8 was obtained using the same method as Test Example 1 except that the relief layer was formed using a thermoplastic resin. In Test Example 8, an ink having the following composition was used as the relief layer ink.
- High molecular methacrylic (PMMA) resin Mitsubishi Rayon Co., Ltd., Dynal BR88
- Low viscosity nitrocellulose Asahi Kasei Kogyo Co., Ltd., BTH1 / 2
- Cyclohexanone Toyo Ink Co., Ltd., S705
- Methyl ethyl ketone Toyo Ink Co., Ltd., VC102
- the relief layer of Test Example 5 does not contain an organosilicon compound, in the step of integrating the transferred material, the upper laminate material, the first lower laminate material, and the second lower laminate material. It is considered that the relief layer was cracked by the shrinkage of the relief layer.
- the relief layer of Test Example 7 since the mass of the ultraviolet curable resin is small, it is considered that cracks occurred in the relief layer due to a decrease in rigidity and toughness of the relief layer.
- Test Example 8 since the heat resistance of the relief layer is low, in the step of integrating the transferred material, the upper laminate material, the first lower laminate material, and the second lower laminate material, It was observed that it was melted. In Test Example 6, it was recognized that the transfer foil, and hence the security laminate, could not be formed because the relief layer was not cured.
- Test Example 9 After forming a release layer and a relief layer in the same manner as in Test Example 3 except that an organosilicon compound containing an acrylic group (CH 2 ⁇ CH—CO—) (KBM-5103, manufactured by Shin-Etsu Chemical Co., Ltd.) is used. Then, a reflective layer having a thickness of 600 mm was formed on the relief surface of the relief layer using a vacuum deposition method. And the transfer foil of Test Example 9 was obtained by forming an adhesive layer on the reflective layer. In addition, the formation material of the reflective layer was any one of aluminum, titanium dioxide, and zinc sulfide, and three types of transfer foils having different reflective layer formation materials were obtained.
- Test Example 10 Test Example using the same method as Test Example 9 except that an organosilicon compound containing a methacryl group (CH 2 ⁇ C (CH 3 ) —CO—) (KBM-503, manufactured by Shin-Etsu Chemical Co., Ltd.) was used. Ten transfer foils were obtained.
- organosilicon compound containing a methacryl group CH 2 ⁇ C (CH 3 ) —CO—
- Test Example 11 A transfer foil of Test Example 11 was obtained using the same method as Test Example 9 except that an organosilicon compound containing an amino group (—NH 2 ) (KBM-903, manufactured by Shin-Etsu Chemical Co., Ltd.) was used.
- Test Example 12 A transfer foil of Test Example 12 was obtained using the same method as Test Example 9 except that an organosilicon compound to which no functional group was added (same as Test Example 1) was used.
- Test Example 13 The transfer foil of Test Example 13 using the same method as Test Example 9 except that an organosilicon compound containing an epoxy group represented by the following structural formula (1) (KBE-403, manufactured by Shin-Etsu Chemical Co., Ltd.) was used. Got.
- organosilicon compound containing an epoxy group represented by the following structural formula (1) KBE-403, manufactured by Shin-Etsu Chemical Co., Ltd.
- Test Example 14 A transfer foil of Test Example 14 was obtained using the same method as Test Example 9 except that an organosilicon compound containing a mercapto group (—SH) (KBM-803, manufactured by Shin-Etsu Chemical Co., Ltd.) was used.
- organosilicon compound containing a mercapto group (—SH) KBM-803, manufactured by Shin-Etsu Chemical Co., Ltd.
- Test Example 15 The transfer foil of Test Example 15 was prepared using the same method as Test Example 9 except that an organosilicon compound containing an isocyanic group (—N ⁇ C ⁇ O) (KBE-9007 manufactured by Shin-Etsu Chemical Co., Ltd.) was used. Obtained.
- Test Example 16 The transfer foil of Test Example 16 was obtained using the same method as Test Example 9 except that an organosilicon compound containing a vinyl group (CH 2 ⁇ CH—) (KBM-1003, manufactured by Shin-Etsu Chemical Co., Ltd.) was used. It was.
- Test Example 17 Using the same method as in Test Example 9 except that an organosilicon compound containing silyl group ((CH 3 ) 3 —Si—) (manufactured by EVONIK INDUSTRIES, DYNASYLAN HMDS) (DYNASYLAN is a registered trademark) was used. A transfer foil was obtained.
- organosilicon compound containing silyl group ((CH 3 ) 3 —Si—) (manufactured by EVONIK INDUSTRIES, DYNASYLAN HMDS) (DYNASYLAN is a registered trademark) was used. A transfer foil was obtained.
- a transfer body (same as Example 1) was prepared, and the transfer body included in each transfer foil of Test Example 9 to Test Example 17 was transferred to the transfer body under the same conditions as in Example 1.
- Table 3 in the transfer foil of Test Example 12, when the material for forming the reflective layer was either aluminum or zinc sulfide, most of the reflective layer was peeled off from the relief layer (x), while When the forming material was titanium dioxide, it was recognized that a part of the reflective layer was peeled off from the relief layer ( ⁇ ).
- each of the transfer foils of Test Example 9 and Test Example 10 when the material for forming the reflective layer is either aluminum or titanium dioxide, the reflective layer does not peel off from the relief layer (O), When the material for forming the reflective layer was zinc sulfide, it was found that most of the reflective layer was peeled off (x) from the relief layer. In the transfer foil of Test Example 11, when the reflective layer forming material is either aluminum or zinc sulfide, the reflective layer does not peel off from the relief layer (O), while the reflective layer forming material is titanium dioxide. In some cases, it was observed that a part of the reflective layer was peeled off ( ⁇ ).
- the reflective layer is a transfer target that is transferred to the transfer target body together with the adhesive layer.
- the transfer foils of Test Example 13 to Test Example 17 it is possible to improve the accuracy of the shape of the contour in the layer formed on the transfer object by transfer and including the adhesive layer and the reflective layer.
- organosilicon organosilicon The adhesion between the relief layer and the adhesive layer can be enhanced by the functional group contained in the compound. Thereby, the accuracy of the shape in the contour can be increased in a layer formed on the transfer medium by transfer and including the adhesive layer, the reflective layer, and the relief layer.
- Test Example 18 using the same method as Test Example 9 except that the ratio of the mass of the ultraviolet curable resin to the mass of the organosilicon compound in the relief layer was changed to 7: 3 and the reflective layer was formed of aluminum. A transfer foil was obtained.
- Test Example 19 A transfer foil of Test Example 19 was obtained using the same method as Test Example 18 except that the ratio of the mass of the ultraviolet curable resin to the mass of the organosilicon compound in the relief layer was changed to 5: 5.
- Test Example 20 A transfer foil of Test Example 20 was obtained using the same method as Test Example 18 except that the ratio of the mass of the ultraviolet curable resin to the mass of the organosilicon compound in the relief layer was changed to 3: 7.
- Test Example 21 A transfer foil of Test Example 21 was obtained using the same method as Test Example 18 except that the ratio of the mass of the ultraviolet curable resin to the mass of the organosilicon compound in the relief layer was changed to 1: 9.
- Test Example 22 A transfer foil of Test Example 22 was obtained using the same method as in Test Example 18 except that no organosilicon compound was used as the relief layer forming material.
- Test Example 23 A transfer foil of Test Example 23 was obtained using the same method as Test Example 18 except that an ultraviolet curable resin was not used as the relief layer forming material.
- Test Example 24 A transfer foil of Test Example 24 was obtained using the same method as Test Example 18 except that the ratio of the mass of the ultraviolet curable resin to the mass of the organosilicon compound in the relief layer was changed to 9: 1.
- Test Example 25 A transfer foil of Test Example 25 was obtained using the same method as Test Example 18 except that a thermoplastic resin was used as the material for forming the relief layer.
- a transfer body (same as in Example 1) was prepared, and each transfer body of Test Example 18 to Test Example 25 was transferred to the transfer body under the same conditions as in Example 1.
- Table 4 shows, in each transfer foil of Test Example 18 to Test Example 21 and Test Example 25, it was recognized that the reflective layer did not peel from the relief layer. In contrast, in each of the transfer foils of Test Example 22 and Test Example 24, it was confirmed that the reflective layer peeled from the relief layer. In Test Example 23, it was confirmed that the transfer foil could not be formed because the relief layer was not cured.
- the ratio between the mass of the ultraviolet curable resin and the mass of the organosilicon compound is included in the range of 1: 9 to 7: 3, thereby improving the adhesion between the relief layer and the reflective layer. It was recognized that However, as shown in Table 2, when the ratio of the mass of the ultraviolet curable resin to the mass of the organosilicon compound is 1: 9, it is recognized that the relief layer is cracked. Therefore, the ratio of the mass of the ultraviolet curable resin to the mass of the organosilicon compound is included in the range of 3: 7 to 7: 3, thereby suppressing cracks in the relief layer and reducing the relief layer and the reflective layer. It is possible to achieve both improvement in adhesion.
- the functional group contained in the organosilicon compound is an acrylic group, and the material for forming the reflective layer is not limited to aluminum, and the functional group contained in the organosilicon compound and the material for forming the reflective layer are in the following combinations: Even in this case, the same tendency as described above was observed in the ratio between the mass of the ultraviolet curable resin and the mass of the organosilicon compound.
- the organosilicon compound contains an acrylic group and the reflective layer forming material is titanium dioxide
- the organosilicon compound contains a methacrylic group
- the reflective layer forming material is either aluminum or titanium dioxide.
- a similar tendency was also observed in these cases.
- the same tendency was also observed when the organosilicon compound contained an amino group and the reflective layer was formed of either aluminum or zinc sulfide.
- the effects listed below can be obtained.
- the organosilicon compound forms a siloxane bond in the relief layer 51, and the heat of the relief layer 51 A siloxane bond is contained in the relief layer 51 to such an extent that shrinkage is suppressed. Therefore, the thermal contraction of the relief layer 51 is suppressed, and the occurrence of cracks in the relief layer 51 is suppressed.
- the forming material of the reflective layer 52 is either aluminum or zinc sulfide, and the ultraviolet curable resin and the organosilicon compound are contained in an appropriate range.
- the adhesion between the layer 51 and the reflective layer 52 is improved. Therefore, it is possible to prevent the reflective layer 52 from being peeled off from the relief layer 51 when the transfer body 41 is transferred.
- the organosilicon compound contains either an acryl group or a methacryl group
- the material for forming the reflective layer 52 is either aluminum or titanium dioxide
- the mass of the ultraviolet curable resin and the organosilicon compound is:
- the relief layer 51 has a melting point of 180 ° C. or higher, even when the relief layer 51 included in the transfer body 41 is heated or pressurized when the authentication certificate 60 is manufactured, the relief layer 51 Damage and deformation can be suppressed.
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Abstract
Description
上記構成によれば、セキュリティ認証積層体を製造するときに、転写体が含むレリーフ層が加熱されたり加圧されたりしても、レリーフ層が損傷したり変形したりすることが抑えられる。
図1から図11を参照して、転写箔、セキュリティ積層体、および、セキュリティ積層体の製造方法を具体化した第1実施形態を説明する。以下では、転写箔の構成、転写箔が有する各層の形成材料、セキュリティ積層体の製造方法、および、転写箔の作用を順番に説明する。なお、図2、図3、図9から図11では、接着層が含む樹脂粒と層状母材とを区別しやすくする便宜上、樹脂粒にドットを付している。
図1から図3を参照して、転写箔の構成を説明する。なお、図2には、図1における領域Aを拡大した断面構造が示されている。
図4を参照して、転写箔10が有する各層の形成材料を説明する。
[接着層]
上述したように、接着層21は、第1樹脂からなる複数の樹脂粒21aと、第2樹脂からなる層状母材21bとを備えている。第1樹脂は、変性ポリオレフィン、結晶性ポリエステル、および、エチレン‐酢酸ビニル共重合体の少なくとも1つであることが好ましい。第2樹脂は、アクリル樹脂、非結晶性ポリエステル、および、酢酸ビニル‐塩化ビニル共重合体の少なくとも1つであることが好ましい。
支持体11は、被転写体に転写される前の転写体12を支持する。支持体11、言い換えれば支持層には、プラスチックフィルムを用いることができる。プラスチックフィルムの形成材料には、ポリエチレンテレフタレート(PET)、ポリエチレンナフタレート(PEN)、および、ポリプロピレン(PP)などを用いることができる。支持体11、言い換えれば支持層は、典型的には、モノリシックな層である。なお、フィルムの形成材料は、転写体12を形成するときに支持体11に掛かる熱や圧力などによって変形したり変質したりしにくい材料であることが好ましい。支持体11には、プラスチックフィルムの他に、紙、合成紙、プラスチック複層紙、および、樹脂含浸紙などを用いることができる。
剥離層22は、支持体11からの剥離が可能な状態で転写体12を支持体11の支持面11Sに位置させるための層である。剥離層22は、支持体11から剥離され、かつ、転写体12が被転写体に転写された後、外的な要因によって接着層21が損傷することを抑える。
転写箔10の転写体が転写される被転写体には、紙やプラスチックフィルムを用いることができる。プラスチックフィルムの形成材料には、ポリエチレンテレフタレート(PET)、ポリエチレンナフタレート(PEN)、ポリプロピレン(PP)、ポリ塩化ビニル(PVC)、非晶性コポリエステル(PET‐G)、および、ポリカーボネート(PC)などを用いることができる。被転写体の厚さは、50μm以上500μm以下であることが好ましく、75μm以上400μm以下であることがより好ましい。
図5から図8を参照して、セキュリティ積層体の製造方法を説明する。
セキュリティ積層体の製造方法は、フィルム状の支持体11の支持面11Sに接着層21を含む転写体12を形成することによって転写箔10を形成することと、転写箔10の転写体12を第1ラミネート材に転写することと、を含む。
図9から図11を参照して、転写箔10の作用を説明する。以下では、転写箔10の作用として、転写箔10における転写対象10Tを被転写体31に転写するときの接着層21の作用を説明する。なお、図9および図10では、説明の便宜上、接着層21のみを示している。また、図11には、図9における領域Bを拡大した平面構造が示されている。
[実施例1]
25μmの厚さを有するPETフィルム(東レ(株)製、ルミラー25T60)(ルミラーは登録商標)を支持体として準備し、グラビアを用いて、以下に示す組成の剥離層用インキを1μmの厚さで支持体の支持面に塗布した。
高分子メタクリル(PMMA)樹脂
(三菱レイヨン(株)製、ダイヤナールBR100) 10部
メチルエチルケトン(東洋インキ(株)製、VC102) 90部
[樹脂粒]
結晶性ポリエステル(東洋紡(株)製、VYLON GM-920)
メチルエチルケトン(東洋インキ(株)製、VC102)
[層状母材]
アクリル樹脂(三菱レイヨン(株)製、ダイヤナール BR-102)
トルエン(東洋インキ(株)製、PD102)
接着層における第1樹脂の質量と第2樹脂の質量との比を3:7に変更した以外は、実施例1と同じ方法を用いて実施例2の転写箔を得た。
接着層における第1樹脂の質量と第2樹脂の質量との比を5:5に変更した以外は、実施例1と同じ方法を用いて実施例3の転写箔を得た。
接着層における第1樹脂の質量と第2樹脂の質量との比を7:3に変更した以外は、実施例1と同じ方法を用いて実施例4の転写箔を得た。
接着層における第1樹脂の質量と第2樹脂の質量との比を9:1に変更した以外は、実施例1と同じ方法を用いて実施例5の転写箔を得た。
樹脂として結晶性ポリエステル(実施例1と同じ)のみを用いて層状である接着層を形成した以外は、実施例1と同じ方法を用いて比較例1の転写箔を得た。
樹脂としてアクリル樹脂(実施例1と同じ)のみを用いて層状である接着層を形成した以外は、実施例1と同じ方法を用いて比較例2の転写箔を得た。
樹脂としてウレタン樹脂(東ソー(株)製、ニッポラン5196)(ニッポランは登録商標)のみを用いて層状である接着層を形成した以外は、実施例1と同じ方法を用いて比較例3の転写箔を得た。なお、接着層用インキとして以下の組成の接着層用インキを用いた。
ウレタン樹脂(東ソー(株)製、ニッポラン5196) 20部
メチルエチルケトン(東洋インキ(株)製、VC102) 50部
トルエン(東洋インキ(株)製、PD102) 50部
100μmの厚さを有する被転写体(SABIC社製、LEXAN SD8B94)(LEXANは登録商標)を準備し、ホットスタンプ転写機を用いて各転写箔の転写体を転写した。このとき、転写温度を120℃に設定し、圧力を200Kg/cm2に設定し、転写時間を1秒間に設定した。
(1)凝集破壊の起こりやすさの差異のために、転写領域21Tの境界を基点とする接着層21の破壊が起こりやすくなり、ひいては、転写体12が含む層の融点や剛性に関わらず、転写体12全体の破壊が起こりやすくなる。そのため、被転写体31に転写によって形成された層の輪郭の形状における精度が高められる。
図12から図19を参照して、転写箔、セキュリティ積層体、および、セキュリティ積層体の製造方法の第2実施形態を説明する。第2実施形態では、第1実施形態と比べて、転写箔がレリーフ層と反射層とを有する点が異なっている。そのため、以下では、こうした相違点を詳しく説明し、第2実施形態において第1実施形態と共通する構成には同じ符号を付すことによって、その詳しい説明を省略する。なお、以下では、転写箔の構成、セキュリティ積層体の構成、セキュリティ積層体を構成する各層の形成材料、セキュリティ積層体からなる認証証明の製造方法、および、試験例を順番に説明する。
図12を参照して転写箔の構成を説明する。
転写箔40は、支持体11と転写体41とを備えている。転写体41は、第1実施形態の転写箔10と同様、接着層21と剥離層22とを備え、さらに、レリーフ層51と反射層52とを備えている。転写体41において、剥離層22、レリーフ層51、反射層52、および、接着層21がこの順に積み重なっている。
図13および図14を参照して、認証証明の構成を説明する。なお、図14では、認証証明を構成する各層を図示する便宜上、各層の幅に対して厚さが誇張されている。
認証証明60が有する各層のうち、第1実施形態と共通する接着層21、および、剥離層22、中間層、支持体以外の層について、その形成材料を説明する。また、以下のラミネート材は、第1実施形態でも共通して用いることができる。
レリーフ層51は、光学的な効果を有するレリーフ構造を含むレリーフ面51Sを有する層である。
反射層52は、レリーフ面51Sに形成されたレリーフ構造による光学的な効果を容易に視認できる程度に大きくするための層である。反射層52の形成材料は、上述したように、アルミニウム、硫化亜鉛、および、二酸化チタンのいずれかであることが好ましい。このうち、アルミニウムは、安価であり、高光沢の不透明な膜を得ることができ、かつ、取り扱いが容易である点で好ましい。硫化亜鉛および二酸化チタンは、可視光における屈折率が高く、そのため可視光での反射率を高くしやく、かつ、加工が容易である点で好ましい。反射層は、単層または多層である。反射層は、一般的に一回または多数回の蒸着、CVD、スパッタにより形成される。反射層52の厚さは、10nm以上500nm以下とすることができる。
被転写体61の形成材料には、レーザー光線を吸収するエネルギー吸収体や、感熱性の変色材料、すなわち、熱によって第1の色から第2の色に変わる特性を有した材料が、各種の樹脂に添加された材料を用いることができる。各種の樹脂には、PET、PEN、PP、PVC、PET‐G、および、PCなどを用いることができる。被転写体61には、例えば、SABIC社製のLEXAN SD8B94を用いることができる。
上側ラミネート材62、第1下側ラミネート材63、および、第2下側ラミネート材64には、プラスチックフィルムを用いることができる。各ラミネート材の形成材料には、PET、PEN、PP、PVC、PET‐G、および、PCなどを用いることができる。このうち、PVC、PET‐G、および、PCのいずれかから形成されるプラスチックフィルムは、通常、各種カードのラミネート材やパスポートのラミネート材として用いられる。これらのプラスチックフィルムは、熱や圧力によって一体化させる加工が容易である点で好ましい。
印刷65は、認証証明60に上述した各種の情報を付与する機能を有する。印刷65は、色を有してよく、また、印刷65は、認証証明60に付与したい情報に応じた形状を有していればよい。
図15から図19を参照して、認証証明の製造方法を説明する。なお、以下では、図示の便宜上、認証証明60が有する印刷65、および、被転写体61の被照射領域61aを省略している。
[試験例1]
実施例1と同様の方法で剥離層を形成した後、グラビアを用いて、以下に示す組成を有したレリーフ層用インキを1μmの厚さで剥離層に塗布することによって、前駆層を形成した。レリーフ層用インキにおいて、すなわちレリーフ層において、紫外線硬化性樹脂の質量と有機ケイ素化合物の質量との比を9:1とした。
エチレン性不飽和基を有する紫外線硬化性樹脂
有機ケイ素化合物(信越化学工業(株)製、KBM-503)
メチルエチルケトン(東洋インキ(株)製、VC102)
レリーフ層における紫外線硬化性樹脂の質量と有機ケイ素化合物の質量との比を7:3に変更した以外は、試験例1と同じ方法を用いて試験例2のセキュリティ積層体を得た。
レリーフ層における紫外線硬化性樹脂の質量と有機ケイ素化合物の質量との比を5:5に変更した以外は、試験例1と同じ方法を用いて試験例3のセキュリティ積層体を得た。
レリーフ層における紫外線硬化性樹脂の質量と有機ケイ素化合物の質量との比を3:7に変更した以外は、試験例1と同じ方法を用いて試験例4のセキュリティ積層体を得た。
レリーフ層の形成材料として有機ケイ素化合物を用いない以外は、試験例1と同じ方法を用いて試験例5のセキュリティ積層体を得た。
レリーフ層の形成材料として紫外線硬化性樹脂を用いない以外は、試験例1と同じ方法を用いて試験例6のセキュリティ積層体を得た。
レリーフ層における紫外線硬化性樹脂の質量と有機ケイ素化合物の質量との比を1:9に変更した以外は、試験例1と同じ方法を用いて試験例7のセキュリティ積層体を得た。
熱可塑性樹脂を用いてレリーフ層を形成する以外は、試験例1と同じ方法を用いて試験例8のセキュリティ積層体を得た。なお、試験例8では、レリーフ層用インキとして以下の組成のインキを用いた。
高分子メタクリル(PMMA)樹脂
(三菱レイヨン(株)製、ダイヤナールBR88) 10部
低粘性ニトロセルロース(旭化成工業(株)製、BTH1/2) 5部
シクロヘキサノン(東洋インキ(株)製、S705) 10部
メチルエチルケトン(東洋インキ(株)製、VC102) 80部
表2が示すように、試験例1から試験例4の各々のセキュリティ積層体では、レリーフ層にひび割れが生じていないことが認められた。これに対して、試験例5および試験例7の各々のセキュリティ積層体では、レリーフ層にひび割れが生じていることが認められた。
アクリル基(CH2=CH-CO-)を含む有機ケイ素化合物(信越化学工業(株)製、KBM-5103)を用いる以外は、試験例3と同じ方法で剥離層およびレリーフ層を形成した後、真空蒸着法を用いてレリーフ層のレリーフ面に600Åの厚さの反射層を形成した。そして、反射層の上に接着層を形成することによって、試験例9の転写箔を得た。なお、反射層の形成材料をアルミニウム、二酸化チタン、および、硫化亜鉛のいずれかとし、反射層の形成材料が異なる3種の転写箔を得た。
メタクリル基(CH2=C(CH3)-CO-)を含む有機ケイ素化合物(信越化学工業(株)製、KBM-503)を用いた以外は、試験例9と同じ方法を用いて試験例10の転写箔を得た。
アミノ基(-NH2)を含む有機ケイ素化合物(信越化学工業(株)製、KBM-903)を用いた以外は、試験例9と同じ方法を用いて試験例11の転写箔を得た。
官能基が付加されていない有機ケイ素化合物(試験例1と同じ)を用いた以外は、試験例9と同じ方法を用いて試験例12の転写箔を得た。
以下の構造式(1)で示すエポキシ基を含む有機ケイ素化合物(信越化学工業(株)製、KBM-403)を用いた以外は、試験例9と同じ方法を用いて試験例13の転写箔を得た。
メルカプト基(-SH)を含む有機ケイ素化合物(信越化学工業(株)製、KBM-803)を用いた以外は、試験例9と同じ方法を用いて試験例14の転写箔を得た。
イソシア基(-N=C=O)を含む有機ケイ素化合物(信越化学工業(株)製、KBE-9007)を用いた以外は、試験例9と同じ方法を用いて試験例15の転写箔を得た。
ビニル基(CH2=CH-)を含む有機ケイ素化合物(信越化学工業(株)製、KBM-1003)を用いた以外は、試験例9と同じ方法を用いて試験例16の転写箔を得た。
シリル基((CH3)3-Si-)を含む有機ケイ素化合物(EVONIK INDUSTRIES製、DYNASYLAN HMDS)(DYNASYLANは登録商標)を用いた以外は、試験例9と同じ方法を用いて試験例17の転写箔を得た。
被転写体(実施例1と同じ)を準備し、実施例1と同じ条件で試験例9から試験例17の各々の転写箔が備える転写体を被転写体に転写した。表3が示すように、試験例12の転写箔では、反射層の形成材料がアルミニウムおよび硫化亜鉛のいずれかであるときには、反射層のほとんどがレリーフ層から剥がれる(×)一方で、反射層の形成材料が二酸化チタンであるときには、反射層の一部がレリーフ層から剥がれる(△)ことが認められた。
レリーフ層における紫外線硬化性樹脂の質量と有機ケイ素化合物の質量との比を7:3に変更し、反射層の形成材料をアルミニウムとする以外は、試験例9と同じ方法を用いて試験例18の転写箔を得た。
レリーフ層における紫外線硬化性樹脂の質量と有機ケイ素化合物の質量との比を5:5に変更した以外は、試験例18と同じ方法を用いて試験例19の転写箔を得た。
レリーフ層における紫外線硬化性樹脂の質量と有機ケイ素化合物の質量との比を3:7に変更した以外は、試験例18と同じ方法を用いて試験例20の転写箔を得た。
レリーフ層における紫外線硬化性樹脂の質量と有機ケイ素化合物の質量との比を1:9に変更した以外は、試験例18と同じ方法を用いて試験例21の転写箔を得た。
レリーフ層の形成材料として有機ケイ素化合物を用いない以外は、試験例18と同じ方法を用いて試験例22の転写箔を得た。
レリーフ層の形成材料として紫外線硬化性樹脂を用いない以外は、試験例18と同じ方法を用いて試験例23の転写箔を得た。
レリーフ層における紫外線硬化性樹脂の質量と有機ケイ素化合物の質量との比を9:1に変更した以外は、試験例18と同じ方法を用いて試験例24の転写箔を得た。
レリーフ層の形成材料として熱可塑性樹脂を用いた以外は、試験例18と同じ方法を用いて試験例25の転写箔を得た。
被転写体(実施例1と同じ)を準備し、実施例1と同じ条件で試験例18から試験例25の各々の転写体を被転写体に転写した。表4が示すように、試験例18から試験例21、および、試験例25の各々の転写箔では、レリーフ層から反射層が剥離しないことが認められた。これに対して、試験例22および試験例24の各々の転写箔では、レリーフ層から反射層が剥離することが認められた。なお、試験例23では、レリーフ層が硬化しないために、転写箔を形成することができないことが認められた。
(4)レリーフ層51において、紫外線硬化性樹脂と有機ケイ素化合物とが、適切な範囲に含まれれば、レリーフ層51内において有機ケイ素化合物同士がシロキサン結合を形成し、また、レリーフ層51の熱収縮を抑える程度にシロキサン結合がレリーフ層51に含まれる。そのため、レリーフ層51の熱収縮が抑えられ、レリーフ層51にひびが生じることが抑えられる。
Claims (11)
- フィルム状の支持体と、
一対の対向面を有し、接着層を有する層状の転写体と、を備え、
前記一対の対向面のうち第1の面は、前記支持体から剥離可能に前記支持体に接しており、前記一対の対向面のうち第2の面を含むように前記接着層が設けられており、
前記接着層はコンポジットであり、第1樹脂からなる複数の樹脂粒と、第2樹脂からなり、前記樹脂粒の間の隙間を埋める層状母材と、を含み、前記第2樹脂の融点は前記第1樹脂の融点よりも低い
転写箔。 - 前記第1樹脂は、変性ポリオレフィン、結晶性ポリエステル、および、エチレン‐酢酸ビニル共重合体の少なくとも1つであり、
前記第2樹脂は、アクリル樹脂、非結晶性ポリエステル、および、酢酸ビニル‐塩化ビニル共重合体の少なくとも1つである
請求項1に記載の転写箔。 - 前記第1樹脂は、変性ポリオレフィンまたは結晶性ポリエステルであり、
前記第2樹脂は、アクリル樹脂である
請求項2に記載の転写箔。 - 前記第1樹脂は、結晶性ポリエステルであり、
前記第2樹脂は、アクリル樹脂である
請求項2に記載の転写箔。 - 前記第1樹脂は、第1樹脂は、結晶性の樹脂であり、
前記第2樹脂は、非結晶性の樹脂である
請求項1から4のいずれか一項に記載の転写箔。 - 前記転写体は、凹凸を有したレリーフ面を含むとともに、紫外線硬化性樹脂と有機ケイ素化合物とから構成されるレリーフ層を含む
請求項1から5のいずれか一項に記載の転写箔。 - 前記転写体は、反射層を備え、
前記反射層は、前記レリーフ面の少なくとも一部を覆うとともに、アルミニウムまたは硫化亜鉛から構成され、
前記有機ケイ素化合物が、アミノ基を含む
請求項6に記載の転写箔。 - 前記転写体は、反射層を備え、
前記反射層は、前記レリーフ面の少なくとも一部を覆うとともに、アルミニウムまたは二酸化チタンから構成され、
前記有機ケイ素化合物は、アクリル基またはメタクリル基を含む
請求項6に記載の転写箔。 - 前記レリーフ層の融点が、180℃以上である
請求項6から8のいずれか一項に記載の転写箔。 - 第1ラミネート材と、
第2ラミネート材と、
請求項1から9のいずれか一項に記載の転写体と、を備え、
前記転写体は、前記第1ラミネート材と前記第2ラミネート材との間に位置する
セキュリティ積層体。 - フィルム状の支持体と転写体とを備える転写箔を形成することであって、前記支持体は支持面を有し、前記転写体は接着層を含み、前記接着層は前記支持面に形成されることと、
前記転写体を第1ラミネート材に転写することと、
前記第1ラミネート材と第2ラミネート材とによって前記転写体を挟んだ状態で、前記第1ラミネート材と前記第2ラミネート材とを接着することと、を含み、
前記接着層はコンポジットであり、第1樹脂からなる複数の樹脂粒と、第2樹脂からなり、前記樹脂粒の間の隙間を埋める層状母材とを含み、前記第2樹脂の融点は前記第1樹脂の融点よりも低い
セキュリティ積層体の製造方法。
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JP2018545054A JP7044068B2 (ja) | 2016-10-12 | 2017-10-12 | 転写箔、セキュリティ積層体、および、セキュリティ積層体の製造方法 |
EP17860615.8A EP3527405B1 (en) | 2016-10-12 | 2017-10-12 | Transfer foil, security laminate, and security laminate production method |
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JP2020097167A (ja) * | 2018-12-18 | 2020-06-25 | 凸版印刷株式会社 | ホットスタンピング箔および積層体の製造方法 |
WO2020209331A1 (ja) * | 2019-04-09 | 2020-10-15 | 凸版印刷株式会社 | 光学構造体、転写箔、物品、および光学構造体の製造方法 |
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KR102414809B1 (ko) * | 2016-10-12 | 2022-06-29 | 도판 인사츠 가부시키가이샤 | 전사박, 시큐리티 적층체, 및 시큐리티 적층체의 제조 방법 |
JP2019055581A (ja) * | 2017-09-21 | 2019-04-11 | エンゼルプレイングカード株式会社 | 装飾付き印刷物 |
KR20230003250A (ko) * | 2020-05-13 | 2023-01-05 | 다이니폰 인사츠 가부시키가이샤 | 열전사 시트, 및 상기 열전사 시트와 중간 전사 매체의 조합 |
FR3141639B1 (fr) * | 2022-11-03 | 2024-09-20 | Surys | Dispositif optique de sécurité |
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JPWO2018070484A1 (ja) | 2019-09-12 |
EP3527405A1 (en) | 2019-08-21 |
US20190232612A1 (en) | 2019-08-01 |
EP3527405B1 (en) | 2022-10-26 |
KR20190068554A (ko) | 2019-06-18 |
KR102414809B1 (ko) | 2022-06-29 |
JP7044068B2 (ja) | 2022-03-30 |
US10675840B2 (en) | 2020-06-09 |
EP3527405A4 (en) | 2019-10-23 |
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