WO2017131089A1 - 積層体、積層体の製造方法、および、個人認証媒体 - Google Patents
積層体、積層体の製造方法、および、個人認証媒体 Download PDFInfo
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- WO2017131089A1 WO2017131089A1 PCT/JP2017/002735 JP2017002735W WO2017131089A1 WO 2017131089 A1 WO2017131089 A1 WO 2017131089A1 JP 2017002735 W JP2017002735 W JP 2017002735W WO 2017131089 A1 WO2017131089 A1 WO 2017131089A1
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- transfer layer
- transfer
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- polycarbonate
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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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
- B32B37/18—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of discrete sheets or panels only
- B32B37/182—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of discrete sheets or panels only one or more of the layers being plastic
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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
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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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
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
- B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
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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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/04—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the partial melting of at least one layer
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- 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
- B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
- B42D25/23—Identity cards
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B42D25/30—Identification or security features, e.g. for preventing forgery
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/324—Reliefs
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/328—Diffraction gratings; Holograms
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/351—Translucent or partly translucent parts, e.g. windows
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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
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
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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
- B42D25/405—Marking
- B42D25/41—Marking using electromagnetic radiation
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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
- 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
- B42D25/455—Associating two or more layers using heat
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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
- B42D25/46—Associating two or more layers using pressure
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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
- B42D25/465—Associating two or more layers using chemicals or adhesives
- B42D25/47—Associating two or more layers using chemicals or adhesives using adhesives
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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
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2305/00—Condition, form or state of the layers or laminate
- B32B2305/34—Inserts
- B32B2305/347—Security elements
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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
- B32B2307/412—Transparent
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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
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/418—Refractive
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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
- B32B2307/422—Luminescent, fluorescent, phosphorescent
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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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- 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
- B32B2429/00—Carriers for sound or information
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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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/02—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
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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
- B44C1/1729—Hot stamping techniques
Definitions
- the present invention relates to a laminate including a transfer layer and containing polycarbonate, a method for producing the laminate, and a personal authentication medium including the laminate, and particularly to a personal authentication medium such as a card or a passport.
- a laminated integrated product provided in a personal authentication medium such as a card or a passport in other words, a laminated product in which a transfer layer is included is another type of integrated product in which the transfer layer is disposed on the surface of the medium.
- a laminated product in which a transfer layer is included is another type of integrated product in which the transfer layer is disposed on the surface of the medium.
- the production of the laminated integrated product in which the transfer layer is encapsulated conventionally includes the following manufacturing steps.
- First, the transfer layer is generally attached to the first sheet by a transfer process such as hot pressing.
- the second sheet and the first sheet are fused by directly bonding the second sheet onto the first sheet.
- the second sheet and the first sheet are bonded together via an adhesive layer to bond the second sheet and the first sheet.
- the encapsulated transfer layer may be damaged or deformed to such a degree that the function of the transfer layer is problematic due to high temperature and pressure over a long period of time during the lamination and integration process. Therefore, in order to avoid this danger, the encapsulated transfer layer needs to be made of a material having a high melting point or high rigidity so as not to be damaged by the temperature and pressure generated in the lamination and integration process.
- the material of the first sheet and the second sheet is a polycarbonate material having a melting point higher than that of the PVC material or the amorphous copolyester material in the laminated integration process.
- the temperature necessary for stacking and integrating polycarbonate materials having a high melting point reaches 170 ° C. to 200 ° C., and it takes about 1 to 30 minutes to stack and integrate.
- Patent Document 1 proposes a method in which a transfer layer is finely divided into points and lines of 5 mm or less and arranged on a sheet in order to minimize damage to the transfer layer due to the lamination integration process.
- a transfer layer that includes a transfer layer and has a transfer property with respect to a polycarbonate sheet in a laminate including polycarbonate and that has sufficient resistance to high temperatures and high pressures in a lamination integration process is produced. It is very difficult.
- the present invention has been made to solve the above-described problems.
- a first aspect is a transfer layer having a plurality of layers including a transparent reflection layer, wherein the transparent reflection layer has a visible light refractive index of 2.0 or more, and faces a plane in which the transfer layer extends.
- the transparent reflective layer is located in a part of the transfer layer, and at least a part of the transparent reflective layer is located on the inner side of the outline of the transfer layer. Transferring the transfer layer having a visible light refractive index of 1.4 to 1.8 in a portion where the transparent reflective layer is not located, onto the first polycarbonate layer; and transferring the transfer layer to the first polycarbonate layer.
- the first polycarbonate layer and the second polycarbonate layer are laminated and integrated with the transfer layer so as to sandwich the transfer layer between the second polycarbonate layer and the second polycarbonate layer.
- a second aspect is a transfer layer having a plurality of layers including a transparent reflection layer, wherein the transparent reflection layer has a visible light refractive index of 2.0 or more, and faces a plane in which the transfer layer extends.
- the transparent reflective layer is located in a part of the transfer layer, and at least a part of the transparent reflective layer is located on the inner side of the outline of the transfer layer.
- the transfer layer having a visible light refractive index of 1.4 or more and 1.8 or less in a portion where the transparent reflection layer is not provided, and a polycarbonate layer including the transfer layer.
- the cross section along the thickness direction of the laminate includes a first cross section where the transfer layer is not present, a second cross section where the transparent reflective layer is not located in the transfer layer, and the transfer layer. Of these, a third cross section in which a portion where the transparent reflective layer is located is included.
- the first cross section and the third cross section are not adjacent to each other.
- the region having the third cross section has a shape expressing any one of a figure, a character, and a pattern in a plan view facing the plane in which the transfer layer extends.
- the region having the third cross section has at least one acute angle or right angle in a plan view opposed to a plane in which the transfer layer extends.
- the said transfer layer has two or more area
- WHEREIN In planar view facing the plane where the said transfer layer spreads, while the area
- the transfer layer includes an optical relief forming layer having an optical relief structure, and the transparent reflective layer is in contact with at least a part of the optical relief structure.
- either of the layers which comprise the said transfer layer contains the luminescent material which has the largest light emission wavelength in the area
- the light emitting material in a plan view opposite to a plane in which the transfer layer extends, is located in a part of the transfer layer, and the shape of the light emitting material is the shape of the transparent reflective layer. Preferably they are different.
- the eleventh aspect is a personal authentication medium comprising the above laminate.
- the present invention it is possible to minimize damage caused by high temperature and high pressure in the laminated integration process in a laminated body including polycarbonate encapsulating a transfer layer, and to further solve the problems of burrs and chips during transfer.
- the transfer layer partially having a transparent reflection layer having a visible light refractive index of 2.0 or more is transferred to the first polycarbonate layer, and the transfer layer is sandwiched between the second polycarbonate layers.
- the first polycarbonate layer and the second polycarbonate layer are laminated so as to be integrated with the transfer layer.
- it is in a state before the lamination integration, and the visible light at the interface between the transfer layer and the polycarbonate sheet is obtained after the lamination integration due to the difference in the visible light refractive index at the interface between the transfer layer and the atmosphere.
- the difference in the refractive index of visible light at the interface changes with the difference in refractive index.
- the area where the transparent reflective layer is not located disappears to the extent that it cannot be visually observed, and the area where the transparent reflective layer is located is such that the observer can observe it. Remain.
- the amount of light reflected in the region where the transparent reflective layer is not located is such that it cannot be observed by the observer, while the amount of light reflected in the region where the transparent reflective layer is located. Is such that it can be observed by an observer. Therefore, it is possible to manufacture a laminate having different shapes of the observed transfer layer before and after the lamination integration.
- the transfer layer included in the laminate only the portion that the observer wants to visually recognize can be made visible, and the portion that the observer does not want to visually recognize can be made invisible.
- the portion that is not desired to be left here is a portion that does not include the transparent reflective layer in the transfer layer, and is wrinkled or damaged due to breakage due to high temperature and high pressure in the process of lamination and integration, for example.
- a possible portion or an end portion of the transfer layer where transfer burrs or chipping easily occur, that is, an outline of the transfer layer can be mentioned.
- the transfer layer may be made of a material having a sufficiently high melting point or high rigidity so as not to be damaged by the temperature and pressure generated in the lamination and integration process. It becomes very easy to produce a polycarbonate laminate.
- the laminated body manufactured according to the first aspect includes a first cross section, a second cross section, and a third cross section in the cross section in the thickness direction of the laminated body.
- the first cross section is a cross section in which no transfer layer is present
- the second cross section is a cross section in which a portion where the transparent reflective layer is not located is present in the transfer layer
- the third cross section is a transparent reflective in the transfer layer. It is a cross section in which the part in which a layer is located exists.
- the following advantages can be obtained by adopting a configuration in which the first cross section and the third cross section are not adjacent to each other.
- the configuration in which the first cross section and the third cross section are not adjacent is a configuration in which the transparent reflection layer is not located at the end of the transfer layer.
- the transparent reflective layer is not positioned at the end of the transfer layer, the end of the transfer layer is not visually recognized after lamination and integration, and the observer cannot confirm that the end of the transfer layer is present there.
- the transparent reflective layer so that the end of the transfer layer, which may cause transfer burr and chipping in the transfer process of the transfer foil, is not selectively visible, it occurs in the transfer process.
- the transfer burrs and chips that can be transferred become invisible in the laminated integration process, and it is no longer possible for the observer to confirm that the transfer burrs and chips are generated.
- the third aspect has many advantages in the production of a laminate. That is, it is necessary to pay attention to transfer burrs and burrs in the transfer process because transfer burrs and burrs are not visible even if they occur, that is, observation is impossible. There is no. Therefore, it is possible to use a material having a high melting point or a high rigidity enough to withstand the heat pressure in the lamination integration process as a material constituting the transfer layer.
- a transfer layer including a transparent reflective layer having a shape expressing any one of a figure, a character, and a pattern having an acute angle or a right angle in the laminate. It becomes.
- the sixth aspect it is possible to easily enclose a transfer body in which a plurality of regions are arranged at fine intervals so that the shortest interval is 1 mm or more and 50 mm or less.
- a transfer layer having a width of 0.5 mm or more and 5 mm or less and including a transparent reflection layer having a linear shape, a curved shape, or a dotted line shape can be easily included in the laminate. It becomes.
- the transfer layer has an optical relief structure, and the transparent reflective layer is in contact with at least a part of the transfer layer, so that an optical effect based on the optical relief structure is given to the laminate. It becomes possible to do.
- the polycarbonate laminate to which the optical effect is imparted can impart further design properties and anti-counterfeiting prevention properties.
- any one of the layers constituting the transfer layer includes a light emitting material, so that a predetermined shape can be expressed by light emission by irradiating the laminate with excitation light. Is possible.
- the design is more effectively achieved by having the light emitting material have a shape different from the shape of the transparent reflective layer of the transfer layer, that is, the shape representing any one of the figure, the character, and the pattern. And anti-counterfeiting property can be imparted.
- a personal authentication medium provided with the said laminated body, Comprising: Manufacture of personal authentication media, such as a card or a passport, is easy.
- FIG. 1B is a cross-sectional view showing a cross-sectional configuration in the AA cross section of FIG. 1A.
- FIG. 2 is a cross-sectional view showing a BB cross section of FIG. 1B. It is a top view which shows roughly the planar structure of the polycarbonate laminated body which concerns on 2nd Embodiment.
- FIG. 6A It is a top view which shows roughly the planar structure in the state which irradiated the excitation light using the light to the laminated body which concerns on 4th Embodiment. It is sectional drawing which shows CC cross section of FIG. 6A. It is a top view which shows roughly the planar structure of the polycarbonate laminated body which concerns on 5th Embodiment. It is a top view which shows roughly the planar structure in the state which irradiated the excitation light using the light to the laminated body which concerns on 5th Embodiment. It is sectional drawing which shows the DD cross section of FIG. 8A. It is a top view which shows roughly the planar structure of the personal authentication medium which concerns on 6th Embodiment.
- FIG. 1A is a plan view schematically showing a configuration in a state before stacking integration in the polycarbonate laminate according to the first embodiment
- FIG. 1B is a plan view of the polycarbonate laminate according to the first embodiment. It is a top view which shows roughly the structure in the state after lamination
- 2A is a cross-sectional view showing the AA cross section of FIG. 1A
- FIG. 2B is a cross-sectional view showing the BB cross section of FIG. 1B.
- FIG. 1A shows a state in which a transfer layer 4 is attached to the first polycarbonate layer 1.
- the transfer layer 4 has a first region 2 that is a region where the transparent reflective layer is not located, and a second region that is star-shaped and where the transparent reflective layer is located. It is comprised from the area
- FIG. 1B shows a polycarbonate laminate 8 including the transfer layer 4.
- the transfer layer 4 is composed of a first region 2 where the transparent reflective layer is not located and a second region 3 having a star shape and where the transparent reflective layer is located. ing.
- the entire second region 3 is located on the inner side of the contour of the first region 2, in other words, the contour of the transfer layer 4, in a plan view facing the plane in which the polycarbonate laminate 8 extends.
- the difference from the configuration shown in FIG. 1A is that the first region 2 is not observed and only the second region 3 is observable. That is, the transfer layer 4 can no longer be observed to have an elliptical shape, and it can only be confirmed to have a star shape.
- the outline of the transfer layer 4 cannot actually be observed, but the original circular shape is indicated by a broken line. In the following, the interface that cannot be actually observed is shown by a broken line for convenience.
- the transfer layer 4 is attached to the upper surface of the first polycarbonate layer 1. Further, in the transfer layer 4, a peeling protective layer 5, a partially provided transparent reflective layer 6, and an adhesive layer 7 are laminated in this order. Of the transfer layer 4, the surface included in the adhesive layer 7 other than the surface in contact with the first polycarbonate layer 1 is exposed to the atmosphere.
- the transfer layer 4 is located on the surface of the first polycarbonate layer 1.
- the transfer layer 4 includes a peel protection layer 5, a transparent reflection layer 6, and an adhesive layer 7.
- the adhesive layer 7 is positioned on the surface of the first polycarbonate layer 1, and the adhesive layer 7, the transparent reflective layer 6, and the peeling protection layer 5 are laminated in this order in the direction away from the surface of the first polycarbonate layer 1. Yes.
- the transparent reflective layer 6 is located only in a part of the peeling protection layer 5 in a plan view facing the plane in which the first polycarbonate layer 1 extends.
- the transfer layer 4 is attached to the upper surface of the first polycarbonate layer 1 using a transfer foil including the transfer layer 4.
- the transfer foil includes a base material and a transfer layer 4 formed on the surface of the base material in a state where peeling from the surface is possible.
- the polycarbonate laminate 8 of FIG. 2B has a structure in which a second polycarbonate layer 12 is laminated on top of the first polycarbonate layer 1 and the transfer layer 4 and the transfer layer 4 is included in the configuration of FIG.
- stacking integration process with and pressure is shown.
- the first polycarbonate layer 1 and the second polycarbonate layer 12 are laminated with the transfer layer 4 in a state where the first polycarbonate layer 1 and the second polycarbonate layer 12 having the transfer layer 4 are laminated. It is the process of integrating.
- the transfer layer 4 is completely encased by the first polycarbonate layer 1 and the second polycarbonate layer 12, and there is no interface at which the transfer layer 4 is exposed to the atmosphere.
- the polycarbonate laminate 8 includes the first polycarbonate layer 1, the second polycarbonate layer 12, and the transfer layer 4.
- the transfer layer 4 is located on a part of the surface of the first polycarbonate layer 1.
- the second polycarbonate layer 12 covers the transfer layer 4 and a portion of the surface of the first polycarbonate layer 1 where the transfer layer 4 is not located.
- the thickness of the first polycarbonate layer 1 is preferably 50 ⁇ m or more and 500 ⁇ m or less.
- the thickness of the first polycarbonate layer 1 is 50 ⁇ m or more, the physical strength as a sheet is sufficient and easy to handle, and when an information display layer is provided by printing or the like, wrinkles are not easily generated.
- the thickness of the first polycarbonate layer 1 is 500 ⁇ m or less, it is possible to reduce the influence of thickness variation and deflection of the sheet itself during processing.
- a more preferable thickness of the transparent sheet is 75 ⁇ m or more and 200 ⁇ m or less.
- the visible light refractive index in the atmosphere is 1, and the visible light refractive index of polycarbonate is 1.6. Further, the visible light refractive index of the peeling protective layer 5 and the adhesive layer 7 constituting the transfer layer 4 is 1.4 or more and 1.8 or less as will be described later. Therefore, the refractive index difference at the interface of the transfer layer 4 exposed to the atmosphere is 0.4 or more. Therefore, when the transfer layer 4 is visually observed, it can be recognized that the transfer layer 4 exists there. In other words, it can be recognized that the transfer layer 4 exists in a portion where the transfer layer 4 is located in the space.
- the interface refractive index difference that can be identified by the human eye is generally assumed to be 0.2 or more. Accordingly, if the difference in refractive index is 0.2 or more, reflected light or scattered light generated by the difference in refractive index at the interface can be recognized, and humans can confirm that the interface exists there. In other words, a human can visually recognize that an interface exists in a portion where the interface is located in space. Conversely, when the refractive index difference is 0.2 or less, a human cannot confirm that an interface exists there. In other words, it cannot be visually recognized that the interface exists in a portion where the interface is located in the space.
- peel protection layer 5 examples include the following materials. That is, the material for forming the peel protection layer 5 has a visible light refractive index and transparency close to the visible light refractive index and transparency of polycarbonate, and is sufficiently resistant to heat and pressure in the laminated integration process. And materials having high toughness, high heat resistance, and high molecular weight.
- nitrocellulose (1.46 to 1.51) having high toughness melamine (1.6) having a visible light refractive index close to the visible light refractive index in polycarbonate, polyarylate (1.61), an epoxy having a thermally stable benzene ring (1.5 to 1.61), a cycloolefin copolymer having a thermally stable cyclic olefin structure (1.53), and the like preferable.
- the material for forming the peel protection layer 5 is a material that is in close contact with the polycarbonate in a high temperature state during the lamination integration process, preferably PMMA (1.49 to 1.5), urethane (1.43), acetic acid.
- Examples include vinyl (1.46), polyethylene (1.53), polypropylene (1.49), and polyester (1.6).
- the visible light refractive index of each material is described in parentheses following the material name described above.
- the transparent reflective layer 6 Of the layer structure of the transfer layer 4, the transparent reflective layer 6 that is partially provided, that is, the transparent reflective layer 6 that is located at a part of the peel protective layer 5 in a plan view facing the plane in which the peel protective layer 5 spreads.
- materials that can be used include inorganic compounds. Examples of the inorganic compound include ZnS (2.3 to 2.4) and TiO 2 (2.5 to 2.7).
- the visible light refractive index of each material is described in parentheses following the material name. However, these are examples of the material for forming the transparent reflective layer 6, and the material for forming the transparent reflective layer 6 is not limited thereto.
- Such a transparent reflective layer shows an image of the back surface (the opposite side of the observer) of the transfer layer 4 at an angle where the reflected light or diffracted light is not observed, while the angle at which the reflected light or diffracted light is emitted. Then, the image by a transparent reflective layer can be observed.
- the transfer layer 4 since the transfer layer 4 has a visible light refractive index and transparency close to the visible light refractive index and transparency of the polycarbonate, the transfer layer 4 causes an image of the back surface of the transfer layer 4 (opposite to the observer) to be formed. It will not be difficult to see.
- the transparent reflection layer 6 is formed on the surface of the peel protection layer 5.
- Vapor deposition using a vapor deposition mask can be used as a method of partially providing the transparent reflective layer 6 on the surface of the peel protection layer 5, that is, a method of forming a part of the surface of the peel protection layer 5.
- a vapor deposition film is formed on the entire surface of the peel protection layer 5, and then the ink is formed. It is possible to use a method of washing away.
- Adhesive layer As a material that can be used for the adhesive layer 7 constituting the transfer layer 4, a material having a visible light refractive index of 1.4 or more and 1.8 or less can be used. As a material for forming the adhesive layer 7, PMMA (1.49 to 1.5), urethane (1.43), vinyl acetate (1.46), polypropylene (1.49), and polyester (1.6) Etc.
- the visible light refractive index of each material is described in the parenthesis following the material name mentioned above.
- the polycarbonate laminate 8 is formed.
- the transparent reflective layer 6 having a visible light refractive index of 2.0 or more, the peeling protective layer 5 or the adhesive layer 7 having a visible light refractive index of 1.4 or more and 1.8 or less adjacent to the transparent reflective layer 6; There is no change in the difference in refractive index at the interface. Therefore, when the polycarbonate laminate 8 is visually observed, the portion where the transparent reflective layer 6 is located can be observed.
- the polycarbonate laminate 8 includes a first cross section 13, a second cross section 14, and a third cross section 15 as cross sections along the thickness direction of the polycarbonate laminate 8. That is, the first cross section 13 is a cross section where the transfer layer 4 is not present, the second cross section 14 is a cross section where the first region 2 of the transfer layer 4 is present, and the third cross section 15 is the second region 3 of the transfer layer 4. It is a cross section where there exists.
- the transparent reflective layer 6 is disposed on the release protective layer 5 so that the first cross section 13 and the third cross section 15 are not adjacent to each other in the entire transfer layer 4.
- the transfer layer 4 does not have a first cross section in contact with the third cross section as a cross section along the thickness direction of the transfer layer 4.
- the entire transparent reflective layer 6 is located on the inner side of the outline of the transfer layer 4 in a plan view facing the plane in which the transfer layer 4 spreads. This eliminates the need to pay attention to the occurrence of transfer burrs and chips generated at the interface of the transfer layer 4 in the transfer process.
- the transparent reflective layer 6 is located on the inner side of the outline of the transfer layer 4 in a plan view facing the plane in which the transfer layer 4 spreads. Thereby, in the part located inside the outline of the transfer layer 4 among the outlines of the transparent reflective layer 6, it is possible to prevent the occurrence of burrs and chips due to the transfer. Therefore, regarding the portion of the outline of the transparent reflective layer 6 located inside the outline of the transfer layer 4, it is not necessary to consider transfer burr and chipping.
- FIG. 3A to FIG. 3C are plan views schematically showing a configuration in a state after lamination integration in the polycarbonate laminate according to the second embodiment.
- a first cross-sectional area 9 having a first cross section a second cross-sectional area 10 having a second cross section, and a third cross-sectional area 11 having a third cross section are shown.
- the third cross-sectional area 11 having the third cross section has a star shape in a plan view opposite to the plane in which the polycarbonate laminate 8 spreads.
- the third cross-sectional region 11 has a shape representing “A”, which is one of the alphabet letters, in a plan view facing the plane in which the polycarbonate laminate 8 spreads.
- the third cross-sectional region 11 is provided in a pattern pattern having a plurality of donut shapes in a plan view facing the plane in which the polycarbonate laminate 8 spreads.
- the third cross-sectional region 11 has a pattern shape composed of elements having four annular shapes in a plan view facing the plane in which the polycarbonate laminate 8 spreads.
- the third cross-sectional area 11 having a predetermined shape is located inside the transfer layer 4, and the transfer burr and chip in the outline of the transfer layer 4 are Due to the difference in the visible light refractive index of each layer provided in the polycarbonate laminate 8, it is difficult to visually recognize. Therefore, according to the polycarbonate laminate 8, the transfer layer 4 makes it possible to easily realize figures, characters, and pattern shapes, more specifically, figures, characters, and pattern shapes having acute angles and right angles.
- FIG. 4 is a plan view schematically showing a configuration in a state after lamination integration in the polycarbonate laminate according to the third embodiment.
- a first cross-sectional area 9 having a first cross section a second cross-sectional area 10 having a second cross section, and a third cross-sectional area 11 having a third cross section are shown.
- the third cross-sectional area 11 having the third cross-section is composed of a plurality of third cross-sectional elements.
- the first element 11A has a rod shape
- the two first elements 11A are positioned at a minute interval
- the second element 11B has a curved figure
- the third element 11C is a broken line
- the fourth element 11D has a dotted line shape.
- the first element 11A has a rod shape extending along one extending direction, and the two first elements 11A are arranged at intervals in the arrangement direction orthogonal to the extending direction.
- the distance between the first element 11A and the first element 11A is not less than 1 mm and not more than 50 mm.
- the width of the first element 11A along the arrangement direction is not less than 0.5 mm and not more than 5 mm.
- the second element 11B has a curved shape extending along the extending direction, and the second element 11B has a plurality of bent portions arranged in the extending direction.
- the width of the second element 11B along the arrangement direction is not less than 0.5 mm and not more than 5 mm, similarly to the first element 11A.
- the third element 11C has a rod shape extending along the extending direction, and the length along the extending direction of the third element 11C is shorter than the length along the extending direction of the first element 11A.
- the four third elements 11C are arranged at equal intervals in the extending direction. In the extending direction, the distance between the third element 11C and the third element 11C is 1 mm or more and 50 mm or less.
- the width of the third element 11C along the arrangement direction is not less than 0.5 mm and not more than 5 mm, similarly to the first element 11A.
- the fourth element 11D has a substantially square shape, and the length of the fourth element 11D is shorter than the length of the third element 11C in the extending direction.
- the plurality of fourth elements 11D are arranged at equal intervals along the extending direction. In the extending direction, the distance between the fourth element 11D and the fourth element 11D is not less than 1 mm and not more than 50 mm, similarly to the third element 11C.
- the width of the fourth element 11D along the arrangement direction is not less than 0.5 mm and not more than 5 mm, similarly to the first element 11A.
- the polycarbonate laminate 16 of the present embodiment it is possible to arrange a plurality of figures, that is, a plurality of elements at minute intervals so that the shortest distance between two elements is 1 mm or more and 50 mm or less. It is.
- a straight line, a curved line, a broken line, or a dotted line with a width of 0.5 mm to 5 mm can be easily realized.
- Such a shape is difficult to realize in the prior art in terms of both the transferability of the transfer foil and the resistance to heat pressure by the lamination integration process.
- the shortest distance between the elements is preferably 1 mm or more and 50 mm or less, as described above, and is 2 mm or more and 10 mm or less. It is more preferable.
- the interval is less than 1 mm, it is difficult to visually confirm that the transparent reflective layer 6 is provided with an interval between them, and it appears that they are connected, so that the visual effect is reduced.
- the interval is larger than 50 mm, it becomes easy to obtain a figure that can be sufficiently realized even by the conventional technique, and it becomes difficult to obtain the advantage of the polycarbonate laminate 16 of the present embodiment.
- the width of the straight line, curve, broken line, and dotted line in other words, the width of each element is preferably 0.5 mm or more and 5 mm or less, and more preferably 1 mm or more and 3 mm or less.
- the width of the element is less than 0.5 mm, it is difficult to visually confirm that the transparent reflection layer has a linear shape, so that the visual effect is reduced.
- the width of the element is larger than 5 mm, it becomes easy to obtain a figure that can be sufficiently realized by the conventional technique, and it is difficult to obtain the advantage of the polycarbonate laminate 16 of the present embodiment.
- FIG. 5 is a cross-sectional view schematically showing a cross-sectional structure of the polycarbonate laminate 20.
- the transfer layer 19 has an optical relief forming layer 17 having an optical relief structure 18, and is partially provided.
- the transparent reflection layer 6 is different in that it is in contact with the optical relief structure 18.
- optical relief forming layer 17 examples of materials that can be used for the optical relief forming layer 17 include urethane, acrylic, cellulose resin, and ultraviolet curable resin.
- the visible light refractive index of these resins is 1.4 or more and 1.8 or less.
- the optical relief structure 18 included in the optical relief forming layer 17 has a concavo-convex shape for expressing optical effects such as diffraction.
- the optical relief structure 18 has an uneven shape having a function of suppressing reflection of light incident on the optical relief structure 18, an uneven shape having a function of scattering isotropically or anisotropically, and converges or diverges light.
- Either a concavo-convex shape having a function as a lens or a concavo-convex shape having a function of selectively reflecting only predetermined polarized light may be used.
- the transfer layer 19 has the optical relief structure 18, and the transparent reflective layer 6 is provided in contact with at least a part thereof.
- the transparent reflective layer 6 may be located in the entire optical relief structure 18.
- the transfer layer 19 can impart optical effects such as an optical diffraction effect, a reflection suppression effect, an isotropic or anisotropic scattering, a lens effect, and a polarization selective reflection to the polycarbonate laminate 20. It is.
- the polycarbonate laminate 20 to which the optical effect is imparted can retain further design properties and performance for preventing counterfeiting and tampering as compared with a configuration to which the optical effect is not imparted.
- the optical relief structure 18 can also have a concavo-convex shape that expresses only one of the optical effects described above, and may have a concavo-convex shape in which a plurality of optical effects are combined.
- the partially provided transparent reflective layer 6 may include a plurality of regions, and the optical relief structure 18 may have a concavo-convex shape having different optical effects for each region.
- FIG. 6A is a plan view showing a state in which the polycarbonate laminate 25 is not irradiated with the excitation light emitted from the light in the polycarbonate laminate according to the fourth embodiment, and FIG. It is a top view which shows the state irradiated with the excitation light which emitted.
- FIG. 6A shows a polycarbonate laminate 25 composed of a first cross-sectional area 9 having a first cross section, a second cross-sectional area 10 having a second cross section, and a third cross-sectional area 11 having a third cross section.
- FIG. 6B shows a state in which excitation light such as ultraviolet light is applied to the polycarbonate laminate 25 by the light 21.
- excitation light such as ultraviolet light
- the second cross-sectional area 10 and the third cross-sectional area 11 of the polycarbonate laminate 25 emit light, that is, the second cross-sectional area 10 and the third cross-sectional area 11 emit light. It can be observed that the region 22 is formed.
- FIG. 7 is a cross-sectional view showing the CC cross section of FIG. 6A.
- the polycarbonate laminate 25 is different in that the transfer layer 24 includes a light emitting material layer 23.
- the transfer layer 24 of the polycarbonate laminate 25 includes a peeling protective layer 5, a light emitting material layer 23, a transparent reflective layer 6, and an adhesive layer 7.
- the light emitting material layer 23 is located on the entire surface of the peel protective layer 5, and the transparent reflective layer 6 is a part of the surface of the light emitting material layer 23 opposite to the surface in contact with the peel protective layer 5. Is located.
- the adhesive layer 7 covers a portion of the transparent reflective layer 6 and the light emitting material layer 23 where the transparent reflective layer 6 is not located.
- the light emitting material layer is a layer containing a light emitting material that absorbs excitation light such as ultraviolet rays and has a maximum light emission wavelength in a visible light region or the like that is a region different from the peak wavelength of the excitation light.
- Materials that can be used as light-emitting materials include diaminostilbene disulfonic acid derivatives, imidazole derivatives, coumarin derivatives, derivatives such as triazole, carbazole, pyridine, naphthalic acid, imidazolone, dyes such as fluorescein and eosin, and benzene rings such as anthracene.
- the luminescent materials include EB-501 (Mitsui Chemicals, Inc., emission color: blue), EG-302 (Mitsui Chemicals, emission color: yellow green), EG-307 ( Examples include Mitsui Chemicals, Inc., emission color: green, ER-120 (Mitsui Chemicals, emission color: red), ER-122 (Mitsui Chemicals, emission color: red), etc. Can do.
- an inorganic material can be used as the light emitting material.
- Inorganic materials include mainly oxides such as Ca, Ba, Mg, Zn, and Cd, crystals such as sulfides, silicates, phosphates, and tungstates, and Mn, Zn, A pigment obtained by adding a metal element such as Ag, Cu, Sb, and Pb or a rare earth element such as a lanthanoid as an activator and baking it can be used. More specifically, inorganic materials include ZnO: Zn, Br (PO) Cl: Eu, ZnGcO: Mn, YO: Eu, Y (P, V) O: Bu, YOSi: Eu, and ZnGcO: Mn etc. can be mentioned.
- the transfer layer 24 may have the light emitting material layer 23, and the peeling protective layer 5 or the adhesive layer 7 constituting the transfer layer 24 contains the light emitting material. May be.
- the polycarbonate laminate 25 has the light emitting region 22, and a predetermined shape can be expressed by light emission of the light emitting region 22.
- the authenticity of the product can be accurately determined.
- the authenticity of the polycarbonate laminate 25 can be determined by the light emitting region provided in the transfer layer 24.
- the design of the polycarbonate laminate 25 can be further improved.
- FIG. 8A is a plan view showing a state in which the polycarbonate laminate 27 is not irradiated with the excitation light emitted by the light in the polycarbonate laminate according to the fifth embodiment, and FIG. It is a top view which shows the state irradiated with the excitation light which emitted.
- the light emitting region 22 that emits light when irradiated with excitation light includes the second cross-sectional region 10 and the third cross-section. The difference is that the region 11 is partially provided in these regions, not the entire region 11.
- the light emitting region 22 is different from the star shape of the third cross-sectional region 11 and has a shape that expresses a pattern, specifically, a vertical stripe pattern. That is, the light emitting region 22 is composed of a plurality of light emitting elements, each light emitting element has a linear shape extending along one direction, and the plurality of light emitting elements are arranged at intervals in a direction orthogonal to one direction. It is out.
- the light emitting region 22 is formed in a different form from the second region 3 where the transparent reflective layer is located. Moreover, since the transparent reflective layer is used, when the light emitting region 22 is caused to emit light by irradiation with excitation light, a pattern different from the transparent reflective layer can be verified. Further, the light emitting area 22 may be a pattern in which characters and codes such as country codes, individual numbers, alphabets, and particularly identification information are recorded. A security pattern such as a geometric pattern can also be used.
- FIG. 9 is a cross-sectional view showing a DD cross section of FIG. 8A.
- the polycarbonate laminate 27 is different in that the transfer layer 26 partially includes the light emitting material layer 23.
- the transfer layer 26 includes a peeling protective layer 5, a light emitting material layer 23, a transparent reflective layer 6, and an adhesive layer 7.
- the light emitting material layer 23 includes a plurality of light emitting elements 23a.
- the light emitting elements 23a extend along one direction and are arranged at equal intervals in a direction orthogonal to the one direction.
- the light emitting material layer 23 is partially positioned on the transfer layer 26 in a plan view facing the plane in which the transfer layer 26 spreads.
- the shape expressed by the light emitting material layer 23 by light emission that is, a vertical stripe pattern
- the shape of the transparent reflective layer 6, that is, a star shape are different from each other.
- FIG. 10 is a plan view schematically showing a planar structure of a personal authentication medium in a sixth embodiment in which a polycarbonate laminate is embodied as a personal authentication medium.
- the personal authentication medium 29 is a card-shaped personal authentication medium in which the transfer layer 30 is included.
- the personal authentication medium 29 is provided with a self-portrait and text information of the owner of the personal authentication medium 29 by printing 28.
- the personal authentication medium 29 includes a first cross-sectional area 9, a second cross-sectional area 10, and a third cross-sectional area 11.
- the first cross-sectional area 9 and the third cross-sectional area 11 are not adjacent to each other.
- the third cross-sectional area 11 has a shape that represents the sun. That is, the third cross-sectional area 11 is a first element having a circular shape and a plurality of second elements having a triangular shape, and a plurality of third cross-sectional regions 11 are located outside the first element along the circumferential direction of the first element.
- the second element In the third cross-sectional area 11, the second element has an acute angle.
- the personal authentication medium 29 such as a card made of a polycarbonate laminate is easier to manufacture than conventional ones, and is provided with a novel design and high performance for preventing forgery and tampering.
- the print 28 can be formed so as to overlap the transfer layer 4 and the transparent reflection layer. In this case, the visibility of the print layer including the print 28 is not lowered, and if the print layer is to be tampered with, the transfer layer 4 is damaged, and therefore tampering can be detected.
- individual information can be formed by a laser.
- This laser printing can also be formed so as to overlap the transfer layer 4 and the transparent reflection layer. In this case, the visibility of the laser print does not decrease as in the case of the print 28, and if the laser print is tampered with, the transfer layer 4 is damaged, so that the tamper can be detected.
- Printing 28 and laser printing can be formed on the back surface of the transfer layer (opposite the viewer). With such a configuration, tampering becomes more difficult.
- part means mass part
- ratio means mass ratio
- a polycarbonate laminate 8 was produced with the configuration described above with reference to FIGS. 1A, 1B, 2A, and 2B.
- a PET film having a thickness of 25 ⁇ m was prepared as a transfer foil holding sheet which is an example of a substrate.
- the ink for peeling protection layer was apply
- the peeling protective layer 5 is coated with a 4 ⁇ m thick adhesive layer ink using a gravure printing method. And the transparent reflective layer 6. This obtained the transfer foil of the Example.
- PET film Limalar manufactured by Toray Industries, Inc.
- Liilar is a registered trademark
- ⁇ Ink for peeling protective layer Polyarylate resin (Tg 220 ° C., refractive index 1.61, tensile modulus 1900 MPa) 12 parts Polyethylene wax 0.1 part Cyclohexanone 40 parts Toluene 50 parts ⁇ Transparent reflective layer 6> Sulfur sulfide (ZnS) thickness 500mm ⁇ Ink for adhesive layer> Polyester resin 20 parts Methyl ethyl ketone 40 parts Toluene 50 parts
- a part of the transfer foil was transferred to the first polycarbonate layer 1 using a hot stamp transfer machine.
- the transfer temperature was set to 120 ° C.
- the transfer time was set to 1 second.
- a polycarbonate sheet manufactured by Bayer, Makofol ID6-2
- Makofol is a registered trademark
- the transfer layer 4 was sandwiched between the first polycarbonate layer 1 to which the transfer layer 4 was transferred and the second polycarbonate layer 12, and lamination and integration were performed so as to enclose the transfer layer 4.
- the second polycarbonate layer 12 a polycarbonate sheet (manufactured by Bayer, Makofol ID6-2) having a thickness of 100 ⁇ m was used.
- the temperature was set to 200 ° C.
- the pressure was set to 80 N / cm 2
- the time was set to 25 minutes.
- the transfer layer 4 since the high melting point and high rigidity polyarylate resin is used as the peeling protective layer 5 included in the transfer layer 4, it is recognized that the transfer layer 4 is not damaged even by the temperature and pressure generated in the lamination integration process. It was. Further, the transfer layer 4 was transferred to generate a large number of transfer burrs in the transfer layer 4, and it was recognized that the transfer layer 4 had a shape significantly different from the horizontally long elliptical shape. However, it was recognized that no transfer burr was observed after the first polycarbonate layer 1 and the second polycarbonate layer 12 were laminated and integrated.
- the polycarbonate laminate containing the transfer layer can be used for personal authentication media and information recording media for cards and passports.
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Abstract
Description
図1Aは、第1の実施形態に係るポリカーボネート積層体において、積層一体化前の状態における構成を概略的に示す平面図であり、図1Bは、第1の実施形態に係るポリカーボネート積層体において、積層一体化後の状態における構成を概略的に示す平面図である。また、図2Aは、図1AのA-A断面を示す断面図であり、図2Bは、図1BのB-B断面を示す断面図である。
第一のポリカーボネート層1の厚さは、50μm以上500μm以下であることが好ましい。第一のポリカーボネート層1の厚さが50μm以上であると、シートとしての物理的強度が十分となり取り扱い易く、印刷などによって情報表示層を設ける際にシワなどが発生し難い。一方、第一のポリカーボネート層1の厚さが500μm以下であると、加工の際に、シート自体が有する厚みのバラツキやたわみの影響を小さくすることができる。透明シートのより好ましい厚さは、75μm以上200μm以下である。
転写層4を構成する1つの層である剥離保護層5に用いることが可能な材料としては、以下の材料を挙げることができる。すなわち、剥離保護層5の形成材料には、ポリカーボネートが有する可視光屈折率と透過性とに近い可視光屈折率と透明性を有し、積層一体化プロセスにおける熱や圧力に対して十分な耐性を持つような強靭性、高耐熱性、および、高分子量を有した材料を挙げることができる。
転写層4の層構成のうち、部分的に設けられる透明反射層6、すなわち、剥離保護層5が広がる平面と対向する平面視において、剥離保護層5の一部に位置する透明反射層6に用いることが可能な材料として、無機化合物が挙げられる。無機化合物としては、ZnS(2.3以上2.4以下)およびTiO2(2.5以上2.7以下)などが挙げられる。なお、材料名に続く括弧内には、各材料の可視光屈折率が記載されている。但し、これらは透明反射層6の形成材料の一例であり、透明反射層6の形成材料は、これらに限定されるものではない。
透明反射層6は、剥離保護層5が有する表面に形成される。透明反射層6を剥離保護層5の表面に部分的に設ける方法、すなわち、剥離保護層5の表面の一部に形成する方法には、蒸着マスクを用いた蒸着を用いることが可能である。また、透明反射層6を設ける方法には、予め剥離保護層5の表面に水溶解性インキを部分的に設けた後、剥離保護層5の表面の全体に蒸着膜を形成し、その後にインキを洗い流す方法を用いることが可能である。
転写層4を構成する接着層7に用いることが可能な材料として、可視光屈折率が1.4以上1.8以下である材料を用いることができる。接着層7の形成材料として、PMMA(1.49以上1.5以下)、ウレタン(1.43)、酢酸ビニル(1.46)、ポリプロピレン(1.49)、および、ポリエステル(1.6)などが挙げられる。
以上のような構成によって、ポリカーボネート積層体8が形成される。
図3Aから図3Cは、第2の実施形態に係るポリカーボネート積層体において、積層一体化後の状態における構成を概略的に示す平面図である。図3Aから図3Cの各々では、第1断面を有する第1断面領域9、第2断面を有する第2断面領域10、更に第3断面を有する第3断面領域11が示されている。
図4は、第3の実施形態に係るポリカーボネート積層体において、積層一体化後の状態における構成を概略的に示す平面図である。図4におけるポリカーボネート積層体16では、第1断面を有する第1断面領域9、第2断面を有する第2断面領域10、および、第3断面を有する第3断面領域11が示されている。更に、第3断面を有する第3断面領域11が、複数の第3断面要素から構成されている。
光学レリーフ形成層17に用いることが可能な材料として、例えば、ウレタン、アクリル、セルロース樹脂、および、紫外線硬化型樹脂などが挙げられる。これら樹脂の可視光屈折率は、1.4以上1.8以下である。但し、これらは光学レリーフ形成層17の形成材料の一例であり、光学レリーフ形成層17の形成材料は、必ずしもこれらに限定されるものではない。
光学レリーフ形成層17が有する光学レリーフ構造18は、回折などの光学効果を発現させるための凹凸形状である。光学レリーフ構造18は、光学レリーフ構造18に入射した光の反射を抑制する機能を有した凹凸形状、等方的又は異方的に散乱させる機能を有した凹凸形状、光を収束させる又は発散させるレンズとしての機能を有した凹凸形状、および、所定の偏光のみを選択的に反射する機能を有した凹凸形状のいずれかでもよい。
図6Aは、第4の実施形態に係るポリカーボネート積層体において、ポリカーボネート積層体25にライトが射出する励起光が照射されていない状態を示す平面図であり、図6Bは、ポリカーボネート積層体25にライトが射出した励起光が照射された状態を示す平面図である。
ここで、発光材料層について説明する。発光材料層は、紫外線などの励起光を吸収し、励起光のピーク波長とは異なる領域である可視光領域などに最大発光波長を有するような発光材料が含有された層である。発光材料として使用可能な材料には、ジアミノスチルベンジスルホン酸誘導体、イミダゾール誘導体、クマリン誘導体、トリアゾール、カルバゾール、ピリジン、ナフタル酸、イミダゾロンなどの誘導体、フルオレセイン、エオシンなどの色素、および、アントラセンなどのベンゼン環を持つ有機系化合物などが挙げられる。
図8Aは、第5の実施形態に係るポリカーボネート積層体において、ポリカーボネート積層体27にライトが射出する励起光が照射されていない状態を示す平面図であり、図8Bは、ポリカーボネート積層体27にライトが射出した励起光が照射された状態を示す平面図である。
また、幾何学的な彩文柄のようなセキュリティ柄を用いることもできる。
図10は、ポリカーボネート積層体を個人認証媒体として具体化した第6の実施形態における個人認証媒体の平面構造を概略的に示す平面図である。個人認証媒体29は、転写層30が内包化されたカード形状の個人認証媒体である。個人認証媒体29には、印刷28によって、個人認証媒体29の保有者の自画像や文字情報が設けられている。また、個人認証媒体29は、第1断面領域9、第2断面領域10、および、第3断面領域11で構成されている。
以下、具体的な実施例を挙げて詳細に説明する。なお、以下の例において、「部」は、質量部を意味し、「比」は、質量比を意味する。
PETフィルム (東レ(株)製、ルミラー)(ルミラーは登録商標)
<剥離保護層用インキ>
ポリアリレート樹脂
(Tg220℃ 屈折率1.61 引張弾性率1900MPa) 12部
ポリエチレンワックス 0.1部
シクロヘキサノン 40部
トルエン 50部
<透明反射層6>
硫化硫黄(ZnS) 厚さ500Å
<接着層用インキ>
ポリエステル樹脂 20部
メチルエチルケトン 40部
トルエン 50部
2…第1領域
3…第2領域
4、19、24、26、30…転写層
5…剥離保護層
6…透明反射層
7…接着層
8、16、20、25、27…ポリカーボネート積層体
9…第1断面領域
10…第2断面領域
11…第3断面領域
11A…第1要素
11B…第2要素
11C…第3要素
11D…第4要素
12…第二のポリカーボネート層
13…第1断面
14…第2断面
15…第3断面
17…光学レリーフ形成層
18…光学レリーフ構造
21…ライト
22…発光領域
23…発光材料層
23a…発光要素
28…印刷
29…個人認証媒体
Claims (11)
- 透明反射層を含む複数の層を有した転写層であって、前記透明反射層の可視光屈折率が2.0以上であり、且つ、前記転写層が広がる平面と対向する平面視において、前記透明反射層が前記転写層の一部に位置するとともに、前記透明反射層の少なくとも一部が、前記転写層の輪郭よりも内側に位置し、前記転写層のうち、前記透明反射層が位置しない部分における可視光屈折率が1.4以上1.8以下である前記転写層を第一のポリカーボネート層上に転写することと、
前記転写層を前記第一のポリカーボネート層と第二のポリカーボネート層との間に挟持し、前記転写層を内包するように前記第一のポリカーボネート層と前記第二のポリカーボネート層とを積層して前記転写層と一体化することと、を備える
積層体の製造方法。 - 透明反射層を含む複数の層を有した転写層であって、前記透明反射層の可視光屈折率が2.0以上であり、且つ、前記転写層が広がる平面と対向する平面視において、前記透明反射層が前記転写層の一部に位置するとともに、前記透明反射層の少なくとも一部が、前記転写層の輪郭よりも内側に位置し、前記転写層のうち、前記透明反射層が位置しない部分における可視光屈折率が1.4以上1.8以下である前記転写層と、
前記転写層を内包するポリカーボネート層と、を備える積層体において、
前記積層体の厚さ方向に沿う断面には、
前記転写層が存在しない第1断面と、
前記転写層のうち、前記透明反射層が位置しない部分が存在する第2断面と、
前記転写層のうち、前記透明反射層が位置している部分が存在する第3断面が含まれる
積層体。 - 前記第1断面と前記第3断面とが隣接していない
請求項2に記載の積層体。 - 前記転写層が広がる平面と対向する平面視において、前記第3断面を有する領域が、図形、文字、および、パターンのいずれかを表現する形状を有する
請求項2又は請求項3に記載の積層体。 - 前記転写層が広がる平面と対向する平面視において、前記第3断面を有する領域が、少なくとも1つの鋭角又は直角を有する
請求項4に記載の積層体。 - 前記転写層は、前記透明反射層を有する領域を複数有し、
前記透明反射層を有する領域の少なくとも2つにおける最短間隔が1mm以上50mm以下である
請求項2から請求項5のいずれかに記載の積層体。 - 前記転写層が広がる平面と対向する平面視において、前記第3断面を有する領域が、0.5mm以上5mm以下の幅を有するとともに、直線状、曲線状、又は、点線状を有している
請求項2から請求項6のいずれかに記載の積層体。 - 前記転写層が光学レリーフ構造を有する光学レリーフ形成層を備え、
前記光学レリーフ構造の少なくとも一部に前記透明反射層が接している
請求項2から請求項7のいずれかに記載の積層体。 - 前記転写層を構成する層のうちのいずれかが、励起光のピーク波長と異なる波長の領域に最大発光波長を有する発光材料を含む
請求項2から請求項8のいずれかに記載の積層体。 - 前記転写層が広がる平面と対向する平面視において、前記転写層の一部に前記発光材料が位置し、且つ、発光材料の有する形状が、前記透明反射層の有する形状と異なる
請求項9に記載の積層体。 - 請求項2から請求項10のいずれかに記載の積層体を備える個人認証媒体。
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DE112017000519.1T DE112017000519T5 (de) | 2016-01-27 | 2017-01-26 | Schichtstoff, verfahren zur herstellung eines schichtstoffs und persönlichesauthentifizierungsmedium |
KR1020187023929A KR102533304B1 (ko) | 2016-01-27 | 2017-01-26 | 적층체, 적층체의 제조 방법, 및 개인 인증 매체 |
EP21208141.8A EP3978245A1 (en) | 2016-01-27 | 2017-01-26 | Laminate, method for producing laminate, and personal authentication medium |
JP2017563815A JP6787346B2 (ja) | 2016-01-27 | 2017-01-26 | 積層体、積層体の製造方法、および、個人認証媒体 |
EP17744319.9A EP3412456B1 (en) | 2016-01-27 | 2017-01-26 | Laminate, method for producing laminate, and personal authentication medium |
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WO2019139051A1 (ja) * | 2018-01-09 | 2019-07-18 | 凸版印刷株式会社 | 積層体、証明証、および、積層体の製造方法 |
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TW201731696A (zh) | 2017-09-16 |
US10471694B2 (en) | 2019-11-12 |
CN108602339A (zh) | 2018-09-28 |
JP6787346B2 (ja) | 2020-11-18 |
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EP3412456A4 (en) | 2019-07-24 |
EP3412456B1 (en) | 2022-07-06 |
CN108602339B (zh) | 2020-06-26 |
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US20180326710A1 (en) | 2018-11-15 |
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