JP2008195030A - Personal authentication medium and manufacturing method of personal authentication medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a personal authentication medium having good forging and tampering preventing function. <P>SOLUTION: The personal authentication medium includes a substrate having a fine unevenness arranged in a character and/or design pattern having a height from 0.01 to 100 μm at least on one main face. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to personal authentication media such as securities, gift certificates, ID cards, IC cards, credit cards, cash cards, employee ID cards, and ID cards, and more particularly to personal authentication media having a function of preventing forgery and alteration.

  In recent years, media such as securities, gift certificates, ID cards, IC cards, credit cards, cash cards, employee ID cards, ID cards, etc., which have added value to themselves or prevent counterfeiting have increased. ing.

  It is necessary to prevent unauthorized use of these media such as cards, and there is a need for a forgery / alteration prevention technique that is difficult to forge and that is easy to determine authenticity.

Known forgery / alteration prevention technologies for such media such as cards include holograms, embossing, watermarks, etc., but as forgery / alteration prevention technologies by providing fine irregularities on the surface of media such as cards according to the present invention. Has a bonded ID card having a fine irregularity of 0.05 to 4.0 μm on the card surface and a method for manufacturing the same (for example, see Patent Document 1). Although this ID card defines the surface roughness of the card (JIS-B-0601 centerline average roughness (Ra)), no character and / or pattern pattern is formed, and in the manufacturing method thereof, Since the surface property is provided with irregularities by adding fine particles to the receiving layer, it is impossible to form irregularities with a desired pattern.
JP 2003-246172 A

  An object of the present invention is to obtain a personal authentication medium having a good anti-counterfeiting function.

  The personal authentication medium of the present invention is characterized in that it includes a base material that is arranged in a character and / or pattern pattern and has fine irregularities having a height of 0.01 to 100 μm on at least one main surface.

  The method for producing a personal authentication medium of the present invention provides a press plate on which at least one main surface is arranged in a character and / or pattern pattern and has fine irregularities having a height of 0.01 to 100 μm. The press plate and the base material are brought into contact with each other and pressed to form fine irregularities having a height of 0.01 to 100 μm arranged on the surface of the base material corresponding to the pattern. It is characterized by.

  Since the personal authentication medium according to the present invention has fine irregularities patterned on the surface of the base material, it is difficult to tamper with, and even if tampered, it can be easily confirmed visually. For this reason, the personal authentication medium according to the present invention has a good anti-counterfeit function.

  The personal authentication medium of the present invention includes a base material and a protective layer, and the base material is arranged in a character and / or pattern pattern on at least one main surface and has a height of 0.01 to 100 μm. Have irregularities.

  If the height of the fine irregularities on the surface of the base material is less than 0.01 μm, there is a disadvantage that the visual visibility is lowered, and if it exceeds 100 μm, the printability on the receiving layer of the corresponding part, surface protection There is a disadvantage that the transferability of the film is lowered.

  Moreover, image layers, such as a character, a pattern, a person image, can be provided in the base-material surface, for example.

  FIG. 1 is a schematic sectional view showing an example of a personal authentication medium according to the present invention.

  FIG. 2 shows an enlarged view of the unevenness 2 of FIG.

  As shown in the figure, the personal authentication medium 10 of the present invention includes, for example, a base material 1, fine irregularities 2 formed on at least a part of the surface of the base material 1, and a printed layer 3 provided on the surface of the base material 1. Have

  In the personal authentication medium of the present invention, even if the base material and the protective layer are peeled off and then reapplied, a gap is easily formed in the character and / or pattern portion, and it is difficult to restore it. The gap between the character and / or pattern portion can be easily confirmed by direct visual observation or by visually observing the card surface through a magnifier of about twice or more. Thus, the personal authentication medium of the present invention is easy to determine authenticity. Moreover, since the unevenness | corrugation provided in the personal authentication medium of this invention has a character or a pattern pattern, it is more difficult to return to original than a random unevenness | corrugation, and authenticity determination is easy.

  The said character and / or pattern pattern may be represented by the convex part or the recessed part between convex parts.

  Here, the depth of the concave portion and the height of the convex portion are simply referred to as height.

  The height of the fine irregularities on the substrate surface is preferably 0.1 to 50 μm.

  0.1. When the thickness is less than μm, the visual visibility tends to be lowered, and when it exceeds 50 μm, the printability of the corresponding portion on the receiving layer tends to be lowered.

  Further, the interval between the fine irregularities on the substrate surface is at least 0.01 mm or more, preferably 0.1 mm to 10 mm. If it is less than 0.01 mm, the press plate manufacturability and the workability during pressing tend to decrease and the visibility tends to decrease. If it exceeds 10 mm, the visibility decreases and tampering and counterfeiting are easy. Tend to be.

  As the receiving layer, a layer having a function of receiving at least one printing layer selected from a melt type thermal transfer printing layer, a sublimation type thermal transfer printing layer, an offset printing layer, an ink jet printing layer, and a hologram printing layer can be used. .

  Also, the method for producing a personal authentication medium of the present invention comprises a press plate in which fine irregularities having a height of 0.01 to 100 μm are formed on at least one main surface and arranged in a character and / or pattern pattern. A step of forming fine irregularities having a height of 0.01 to 100 μm arranged on the surface of the base material corresponding to the above pattern by preparing and pressing the press plate and the base material. including.

  According to the method of the present invention, a part of or all of the surface of the press plate is provided with characters and / or patterns patterned with fine irregularities, and the surface of the personal authentication medium is simply provided for the pressing process. Characters and / or patterns patterned with fine irregularities can be easily formed on a part or all. Moreover, arbitrary characters and / or patterns can be provided on the press plate.

  The said character and / or pattern pattern may be represented using the convex part between a recessed part and a recessed part.

<Press plate>
As the press plate, a known inorganic material such as stainless steel, nickel, aluminum, brass, copper, iron, or a mixture / compound containing them can be used. The thickness of the press plate is preferably 0.5 mm or more, and if it is less than 0.5 mm, the workability and the handleability during pressing tend to be difficult. Practically, it is preferably 1 mm to 30 mm.

<Press plate processing method>
As a processing method for providing a patterned character and / or pattern with fine unevenness on a part or all of the surface of the press plate, this surface is subjected to electron beam processing, YAG laser processing, plasma processing, carbon dioxide laser processing, excimer. Examples of the method include forming a recess by physically and / or chemically engraving using laser processing, chemical polishing, electrolytic processing, photoetching processing, and sand blast processing.

  Alternatively, by forming the convex portions on the surface of the press plate by at least one processing method among known printing techniques such as intaglio printing, letterpress printing, and offset printing, and known vapor deposition processing techniques, A recess may be formed in the surface.

  Furthermore, a known mechanical process such as a sandblasting process, or a sheet having fine irregularities that are meshed or patterned is superimposed on the surface of a press plate provided with fine irregularities of characters and / or pattern patterns. By providing finer irregularities, it is possible to form a composite pattern with a pattern different from the character and / or pattern.

  FIG. 3 schematically shows a cross section of an example of a complex pattern.

  As shown in the figure, when a complex pattern is used, it is more difficult to falsify and the function of preventing forgery and alteration becomes higher.

  The height of the fine irregularities provided on the press plate is preferably in the range of 0.01 to 100 μm. More preferably, it is in the range of 0.1 to 50 μm. If the height of the irregularities is less than 0.01 μm, the press plate manufacturability and the workability during pressing tend to decrease and the visibility tends to decrease. If it exceeds 100 μm, the visibility decreases and tampering occurs. , Tend to be easy to counterfeit. Moreover, when it is in the range of 0.1 to 50 μm, there is an advantage that the productivity of the press plate and the processing quality at the time of pressing are stabilized.

<Hot press processing>
A known hot press working method can be used for the press working.

The hot pressing temperature varies depending on the softening point of the substrate to be processed, but is preferably in the range of 60 to 200 ° C. The time for applying the heat press at that temperature varies depending on the productivity, the softening point of the processed substrate, etc., but is preferably about 1 to 180 minutes. The pressure for applying the hot press is preferably 5 to 100 kg / cm ² .

<Protective sheet>
A protective sheet may be provided on the surface of the press plate as necessary in order to prevent generation of surface defects due to foreign matter, dust, and the like. As a material for the protective sheet, a polymer material such as polyethylene, polypropylene, polycarbonate, polyvinyl chloride, polyterephthalate, or the like can be used. The thickness of the protective sheet is preferably 10 to 100 μm. The thickness of the protective sheet is preferably thicker from the viewpoint of productivity such as handling, but is preferably thinner from the viewpoint of unevenness transferability. Can be achieved.

<Base material>
The base material is a support layer alone or a laminate including a support layer and a receiving layer.

  Examples of the support layer include polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinyl acetate-vinyl alcohol copolymer, vinyl chloride-vinyl acetate-maleic acid copolymer, and vinyl chloride-acrylate copolymer. Chlorine-containing polymers such as polymers, polyvinylidene chloride, vinylidene chloride-vinyl chloride copolymers, vinylidene chloride-acrylonitrile copolymers, such as polyethylene terephthalate resins, polybutylene terephthalate resins, or acids such as terephthalic acid or isophthalic acid Polyester resins such as condensation ester resin (for example, PETG (registered trademark) manufactured by Eastman Chemical Co., Ltd.) of the component and an alcohol component such as ethylene glycol or cyclohexanedimethanol, such as polylactic acid resin, starch and modified polyvinyl chloride Natural polymer resins such as oleic alcohol, biodegradable plastic resins such as microbe-produced resins composed of β-hydroxybutyric acid and β-hydroxyvaleric acid, polyamide resins, acrylic resins, silicone resins, etc. These materials can be used alone or in combination, and further in a single layer or laminated.

  In the present invention, a recording material may be provided on the substrate as necessary. As such a recording material, a material capable of recording information electrically, magnetically, or optically can be used. Other recording materials provided in layers may be part or all of the front and back of the medium.

<Receptive layer>
A receiving layer capable of easily receiving direct or indirect thermal transfer printing, sublimation printing, ink jet printing, and hologram printing can be provided on the substrate. By providing the receiving layer, printing defects can be reduced. The receiving layer can be provided on part or all of the front and back of the substrate.

  As the receiving layer, a known resin material can be used. For example, styrenes such as styrene, o-methylstyrene, p-methylstyrene, and 2,4-dimethylstyrene, such as vinylnaphthalenes, ethylene, propylene, isobutylene, Ethylenically unsaturated monoolefins such as butadiene, vinyl esters such as vinyl acetate and vinyl propionate, vinyl halides such as vinyl chloride, vinyl fluoride, vinylidene chloride and vinylidene fluoride, such as methyl acrylate, Alkyl esters of acrylic acid such as ethyl acrylate, propyl acrylate, n-butyl acrylate, isobutyl acrylate, 2-ethylhexyl acrylate, n-octyl acrylate, dodecyl acrylate, and the like, for example, methyl methacrylate, methacrylic acid ethyl Obtained by copolymerizing a resin obtained by polymerizing monomers of alkyl esters of methacrylic acid such as propyl methacrylate, n-butyl methacrylate, isopropyl methacrylate, and isobutyl methacrylate, or by copolymerizing two or more monomers. Resin. Examples of the copolymer resin include styrene-acrylic acid ester copolymer resin, styrene-methacrylic acid ester copolymer resin, and styrene-butadiene copolymer resin. In addition to the vinyl copolymer resin, a polyester resin, a polyurethane resin, an epoxy resin, a petroleum resin, a butyral resin, or the like can be used. A thermosetting resin can also be used in combination with a thermoplastic resin. Examples of the thermosetting resin include silicone resin, epoxy resin, phenoxy resin, urea resin, melamine resin, unsaturated polyester resin, alkyd resin, and the like.

  The thickness of the receiving layer is sufficient to fix the sublimation dye ink, the melt thermal transfer ink and the ink jet printer ink that form the face image and personal information formed on the card substrate as image information, and The thickness is preferably at least 0.1 μm or more so that patterned irregularities can be sufficiently formed. Practically, it is more preferably 1 mm to 50 μm.

<Image layer (printing layer)>
Image layers such as characters, designs, and facial photographs provided on the personal authentication medium of the present invention are formed on a substrate by, for example, melt-type thermal transfer printing, sublimation-type thermal transfer printing, offset printing, inkjet printing, and hologram printing. be able to.

  When a protective layer or the like is provided, for example, a reverse image can be formed in advance on the protective layer and transferred onto the substrate.

<Other functional layers>
Other functional layers such as a protective layer and a hologram layer can be provided on the substrate on which the image layer is formed.

<Authentication method>
As a true / false judgment method, direct visual inspection is performed. If it cannot be confirmed by direct visual observation, it can be easily confirmed by visually observing the card surface under oblique light using a magnifying glass of about 2 times or more.

Examples Hereinafter, the present invention will be described more specifically with reference to examples.

Example 1
A stainless steel plate having a size of 70 mm × 100 mm and a thickness of 2 mm was prepared, and a letter pattern having a height of 5 μm was cut into a part of one main surface thereof by a photoetching method to obtain a press plate 11.

  FIG. 4 shows a front view of the obtained press plate 11.

  As shown in the figure, the press plate 11 has a character pattern 22 having a height of 5 μm on a part of one main surface of a stainless steel flat plate 21.

  Next, as the support sheet 23, a white polyester film having a thickness of 350 μm is prepared, a receiving layer coating material having the following composition is applied, and the support sheet 23 is coated and dried on the support sheet 23 using a gravure printing method. A receiving layer 24 having a thickness of 10 μm was formed to obtain a main substrate sheet 25.

Receptive layer coating material composition Methyl ethyl ketone 30 parts by weight Toluene 30 parts by weight Polyester urethane resin (trade name: UR-1400, manufactured by Toyobo Co., Ltd.)
30 parts by weight amino-modified silicone oil (trade name: TSF4700, manufactured by Toshiba Silicone Co., Ltd.)
0.2 parts by weight isocyanate (trade name: Coronate 2513, manufactured by Nippon Polyurethane Co., Ltd.)
1 part by weight Polypropylene sheets having a thickness of 20 μm as protective sheets are arranged on both sides of the press plate 11, the base sheet 25 on which the receiving layer 24 created above is formed, PET-G having a thickness of 30 μm, and A white polyester film having a thickness of 350 μm is stacked as the sub-base sheet 26, the press plate 11 is placed on the receiving layer 24 side, and the surface of the sub-base sheet 26 opposite to the main base sheet 25 is 2 mm thick. Using a stainless steel flat plate, pressing was performed at a temperature of 120 ° C. for 10 minutes at a pressure of 12 kg / cm 2 using a hot press machine. The pressed laminated sheet was punched and cut with a predetermined punching blade to produce a card-like laminated sheet of 54.0 mm × 84.6 mm.

  After that, a character information and face image print layer 41 was formed as personal information on the receiving layer 24 by a sublimation printing type card printer, and an ID card 31 to which the personal information was added was manufactured.

  A diagram schematically showing a cross-sectional structure of the ID card 31 is shown in FIG.

  As shown in the figure, this ID card 31 includes a sub-base sheet 26 as a base sheet 28 and a support sheet 23 and a receiving layer 24 formed on the sub-base sheet 26 via PET-G (not shown). Main substrate sheet 25 made of On the receiving layer 24, an uneven character pattern 22 'and a printing layer 41 are provided.

  6 and 7 show modifications of the ID card 31, respectively.

  On the receiving layer 24 of the ID card 31 formed in the same manner, a commercially available hologram sheet 27 was thermally transferred via the character information and face image printing layer 41 to obtain another ID card 32.

  As shown in FIG. 6, the obtained ID card 32 has the same configuration as the ID card 31 shown in FIG. 5 except that the hologram sheet 27 is provided on the receiving layer 24.

  Furthermore, on the receiving layer 24 of the ID card 31 formed in the same manner, a surface protection sheet 29 made of commercially available Nisca was thermally transferred via the character information and face image printing layer 41 to produce an ID card 33.

  As shown in FIG. 7, the obtained ID card 33 has the same configuration as the ID card 31 shown in FIG. 5 except that a protective sheet 29 is provided on the receiving layer 24.

  With respect to the obtained ID cards 31, 32, and 33, it was confirmed from the front that the pressed character pattern was identifiable.

  The height of the uneven character pattern on the receiving layer 24 of the ID card 31 was 1 μm. Further, regarding the ID cards 31, 32, and 33, the heights of the uneven character patterns were measured before the hologram sheet 27 and the surface protection sheet 29 were thermally transferred.

  The height of the character pattern was measured using a surfcoder SE1700 manufactured by Kosaka Laboratory.

  The obtained results are shown in Table 1 below.

  The printed layer of the ID card 31 was peeled off, and another content was printed. When observed with a magnifying glass of 10 times with the naked eye, there was no pressed character pattern as it should be and tampering could be easily confirmed. .

  Further, the hologram sheet 27 of the ID card 32 and the surface protection sheet 29 of the ID card 33 are peeled off from the receiving layer 24 and pasted to the original position and observed with a magnifying glass 10 times visually. It was confirmed that peeling occurred.

Example 2
A stainless steel flat plate having a thickness of 4 mm is prepared, and a press plate 41 having an uneven character pattern with a height of 15 μm on its surface is formed on one main surface by a vacuum deposition method through a stainless negative plate. Obtained.

  In FIG. 8, the front view of the obtained press board 12 is shown.

  As shown in the figure, the press plate 12 has a character pattern 52 having a height of 15 μm on almost one surface excluding the outer edge portion of one main surface of the stainless steel flat plate 51.

  Next, as the support sheet 23, a white polyester film having a thickness of 350 μm is prepared, a receiving layer coating material having the same composition as in Example 1 is applied, and the support sheet 23 is coated on the support sheet 23 using a gravure printing method. By drying, a receiving layer 24 having a thickness of 10 μm was formed, and a main base sheet 25 was obtained.

As a protective sheet, a polyester film having a thickness of 30 μm is disposed on both sides of the press plate 51, a base sheet 25 on which the receiving layer 24 formed above is formed, PET-G having a thickness of 30 μm, and a sub base sheet 26, a white polyester film having a thickness of 350 μm is stacked, the press plate 12 is disposed on the receiving layer 24 side, and a surface of the sub-base material sheet 26 opposite to the main base material sheet 25 has a thickness of 2 mm. A stainless steel flat plate was placed and pressed at a temperature of 110 ° C. for 6 minutes at a pressure of 25 kg / cm ² with a hot press.

  The pressed laminated sheet was punched out in the same manner as in Example 1, and punched and cut with a predetermined punching blade to produce an ID card of 54.0 mm × 84.6 mm.

  Thereafter, a character information and face image printing layer 41 was formed as personal information on the receiving layer 24 by a sublimation printing type card printer, and an ID card 34 to which the personal information was added was manufactured.

  A diagram schematically showing a cross-sectional structure of the ID card 34 is shown in FIG.

  As shown in the figure, this ID card 34 includes a sub-base sheet 26 and a support sheet 23 and a receiving layer 24 formed on the sub-base sheet 26 via a PET-G (not shown) as a base sheet 28. Main substrate sheet 25 made of On the receiving layer 24, an uneven character pattern 52 'and a printing layer 41 are provided.

  The ID card 34 is the same as that shown in FIG. 5 except that an uneven character pattern 52 'is provided instead of the uneven character pattern 22'.

  10 and 11 show modifications of the ID card 34, respectively.

  A commercially available hologram sheet 27 was thermally transferred onto the receiving layer 24 of the ID card 34 formed in the same manner through a printed layer of character information and a face image to obtain another ID card 35.

  As shown in FIG. 10, the obtained ID card 32 has the same configuration as the ID card 34 shown in FIG. 9 except that the hologram sheet 27 is provided on the receiving layer 24.

  Further, on the receiving layer 24 of the ID card 34 formed in the same manner, a surface protective sheet 29 made of commercially available Nisca was thermally transferred via the character information and face image printing layer 41 to produce an ID card 36.

  As shown in FIG. 11, the obtained ID card 35 has the same configuration as the ID card 34 shown in FIG. 9 except that a protective sheet 29 on the receiving layer 24 is provided.

  With respect to the obtained ID cards 34, 35, and 36, it was confirmed from the front that the pressed character pattern was identifiable.

  The height of the uneven character pattern on the receiving layer 24 of the ID card 34 was 7 μm. Further, regarding the ID cards 34, 35, and 36, when the heights of the uneven character patterns were measured before the hologram sheet 27 and the surface protective sheet 29 were thermally transferred, respectively, they were similarly 7 μm.

  The printed layer of the ID card 34 was peeled off, and another content was printed. When observed with a magnifying glass of 10 times with the naked eye, there was no pressed character pattern as it should be, and tampering could be easily confirmed. .

  Further, when the hologram sheet 27 of the ID card 35 and the surface protection sheet 29 of the ID card 36 are peeled off from the receiving layer 24 and attached to the original position and observed with a magnifying glass 10 times visually, there is a gap in the character pattern portion. It was confirmed that peeling occurred.

Example 3
Two stainless steel flat plates with a thickness of 3 mm were prepared, and two press plates 13 were formed on each main surface by stacking 30 μm-thick polypropylene sheets processed into a mesh shape with a height of 30 μm by pressing. Obtained.

  FIG. 12 shows a front view of the obtained press plate 13.

  As shown in the drawing, the press plate 13 has a mesh pattern 54 having a height of 30 μm on almost one main surface of the stainless steel flat plate 53.

  Next, in producing the ID card, a polyvinyl chloride (PVC) having a thickness of 350 μm was prepared as the main base sheet 43.

Polypropylene sheets with a thickness of 60 μm are arranged on both sides of the press plate 13 as protective sheets, and a white polyester film with a thickness of 350 μm is stacked as the main base sheet 43, PET-G with a thickness of 30 μm, and the sub base sheet 26. The two press plates 13 are respectively arranged on both the main base material sheet 43 surface and the sub base material sheet 26 surface, and at a temperature of 100 ° C. at a pressure of 40 kg / cm ² by a hot press machine. Pressed for 3 minutes.

  The pressed laminated sheet was punched out in the same manner as in Example 1, and punched and cut with a predetermined punching blade to produce an ID card of 54.0 mm × 84.6 mm.

  Thereafter, a character information and face image print layer 41 was formed as personal information on the surface of the main base sheet 43 by a sublimation printing type card printer, and an ID card 37 to which the personal information was added was manufactured.

  A diagram schematically showing a cross-sectional structure of the ID card 37 is shown in FIG.

  As shown in the figure, the ID card 37 includes, as a base sheet 44, a sub base sheet 26 and a main base sheet 43 formed on the sub base sheet 26 via a PET-G (not shown). . An uneven mesh pattern 54 ′ is provided on the surface of the main base material sheet 43 and the surface of the sub base material sheet 26. A print layer 41 is provided on the surface of the main base material sheet 43.

  14 and 15 show modifications of the ID card 37, respectively.

  On the main substrate sheet 43 of the ID card 37 formed in the same manner, the commercially available hologram sheet 27 was thermally transferred via the character information and face image printing layer 41 to obtain another ID card 38.

  The obtained ID card 38 has the same configuration as the ID card 37 shown in FIG. 13 except that the hologram sheet 27 is provided on the main base sheet 43 as shown in FIG.

  Further, the surface protection sheet 29 made of commercially available Nisca is thermally transferred onto the main base material sheet 43 of the ID card 37 formed in the same manner through the print layer 41 of the character information and face image, and the ID card 39 is manufactured. did.

  As shown in FIG. 15, the obtained ID card 39 has the same configuration as the ID card 37 shown in FIG. 13 except that the protective sheet 29 is provided on the main base sheet 43.

  With respect to the obtained ID cards 37, 38, and 39, it was confirmed visually from the front that the pressed mesh pattern was identifiable.

  The height of the mesh pattern on the main base sheet 43 of the ID card 37 was 10 μm. Further, regarding the ID cards 37, 38, and 39, the height of the mesh pattern was measured before the hologram sheet 27 and the surface protection sheet 29 were thermally transferred.

  The height of the character pattern was measured using a surfcoder SE1700 manufactured by Kosaka Laboratory.

  The obtained results are shown in Table 1 below.

  The printed layer of the ID card 37 was peeled off, another content was printed, and observed visually and with a magnifier of 10 times. As a result, there was no original pressed character pattern, and tampering could be easily confirmed. .

  Furthermore, when the hologram sheet 27 of the ID card 38 and the surface protection sheet 29 of the ID card 39 are peeled off from the base material sheet 43 and attached to the original position and observed visually and with a magnifier of 10 times, It was confirmed that a gap was generated and the film was peeled off.

Example 4
A rectangular stainless steel flat plate having a thickness of 2 mm as in Example 1 is prepared.

  Next, a flat aluminum flat plate having a size of 90 mm × 90 mm, whose long side is shorter than the stainless steel flat plate, was laminated and fixed near the center of the stainless steel flat plate so that both short sides thereof were exposed. Then, only the part which does not have the aluminum flat plate of a stainless steel flat plate was sandblasted, and the press board 14 was obtained.

  In FIG. 16, the front view showing the obtained press board 14 is shown.

  As shown in the figure, this press plate 14 has a height of 3 μm in the form of a strip of 15 mm width × 80 mm length whose longitudinal direction is parallel to the short side in the vicinity of the opposing short side of one main surface of the flat plate 55 made of stainless steel. The mesh pattern 56 is provided.

  The ID card 61 is similar to the third embodiment and its modification except that the press plate 14 is used instead of the press plate 13 and the thickness of the protective sheet disposed on both sides of the press plate 14 is 20 μm instead of 60 μm. 62, 63 were obtained.

  FIGS. 17 to 19 are diagrams schematically showing cross sections of examples of the ID cards 61, 62, and 63, respectively.

  Further, the height of the mesh pattern on the main base sheet 43 of the ID card 61 was 0.1 μm. Further, regarding the ID cards 61, 62, and 63, when the height of the mesh pattern was measured before the hologram sheet 27 and the surface protection sheet 29 were thermally transferred, respectively, they were 0.1 μm.

  The height of the character pattern was measured using a surfcoder SE1700 manufactured by Kosaka Laboratory.

  The obtained results are shown in Table 1 below.

  The printed layer of the ID card 61 is peeled off, another content is printed, and when observed visually and with a 10-fold magnifier, the original pressed character pattern disappears and tampering can be easily confirmed. It was.

  Further, the hologram sheet 27 of the ID card 62 and the surface protection sheet 29 of the ID card 63 are peeled off from the base material sheet 43 and pasted on the original position and observed visually and with a 10-fold magnifier. It was confirmed that a gap was generated and the film was peeled off.

Comparative Example 1
A comparative example will be described below.

As a press plate, a stainless steel flat plate with a thickness of 2 mm was used, and the press was performed at a temperature of 120 ° C. for 10 minutes at a pressure of 12 kg / cm ² with a hot press machine, as in Example 1 and its modifications. ID cards 64, 65, and 66 were manufactured.

  Schematic diagrams showing cross sections of the obtained ID cards 64, 65, 66 are shown in FIGS. 20, 21, and 22, respectively.

  As for the ID cards 64, 65, and 66, since the flat plate made of stainless steel was used, the unevenness was not formed.

  23 to 27, front views of the ID cards 31, 34, 37, 61, and 64 obtained in Examples 1 to 4 and Comparative Example 1 are shown.

In the figure, 22 ′, 52 ′, 54 ′, and 56 ′ each indicate a fine concavo-convex pattern, and 101 ′, 102 ′, 103 ′, and 104 ′ are respectively circled regions 101, The figure which expanded 102, 103, and 104 is shown.

Schematic sectional view showing an example of a personal authentication medium according to the present invention The figure which expanded the unevenness | corrugation 2 of FIG. A diagram schematically showing a cross section of an example of a complex pattern The figure which represents typically the cross section of an example of the press board used for this invention The figure which represents typically the cross section of an example of the ID card which concerns on this invention The figure which represents typically the cross section of an example of the ID card which concerns on this invention The figure which represents typically the cross section of an example of the ID card which concerns on this invention The figure which represents typically an example cross section of the press board used for this invention The figure which represents typically the cross section of an example of the ID card which concerns on this invention The figure which represents typically the cross section of an example of the ID card which concerns on this invention The figure which represents typically the cross section of an example of the ID card which concerns on this invention The figure which represents typically an example cross section of the press board used for this invention The figure which represents typically the cross section of an example of the ID card which concerns on this invention The figure which represents typically the cross section of an example of the ID card which concerns on this invention The figure which represents typically the cross section of an example of the ID card which concerns on this invention The figure which represents typically an example cross section of the press board used for this invention The figure which represents typically the cross section of an example of the ID card which concerns on this invention The figure which represents typically the cross section of an example of the ID card which concerns on this invention The figure which represents typically the cross section of an example of the ID card which concerns on this invention The figure which represents typically the cross section of the ID card which concerns on the comparative example 1 The figure which represents typically the cross section of the ID card which concerns on the comparative example 1 The figure which represents typically the cross section of the ID card which concerns on the comparative example 1 The front view which represents typically an example of the ID card which concerns on this invention The front view which represents typically an example of the ID card which concerns on this invention The front view which represents typically an example of the ID card which concerns on this invention The front view which represents typically an example of the ID card which concerns on this invention Front view schematically showing an example of an ID card according to Comparative Example 1.

Explanation of symbols

  1, 28, 44 ... base material 10, 31, 34, 37, 61, 64 ... personal authentication medium, 11, 12, 13, 14 ... press plate, 22'52'54'56 '... fine irregularities, 23 ... support layer 41 ... printing layer, 24 ... receiving layer,

Claims (15)

  A personal authentication medium, comprising a base material arranged in a character and / or pattern pattern and having fine irregularities having a height of 0.01 to 100 μm on at least one main surface.   The personal authentication medium according to claim 1, wherein the height is 0.1 to 50 μm.   The substrate has a support layer and a receiving layer, and the receiving layer is at least one selected from a melt type thermal transfer printing layer, a sublimation type thermal transfer printing layer, an offset printing layer, an inkjet printing layer, and a hologram printing layer. The personal authentication medium according to claim 1, wherein the personal authentication medium has a function of receiving a print layer.   The fine irregularities are arranged in a character and / or pattern pattern, and are pressed using a press plate on which fine irregularities having a height of 0.01 to 100 μm are formed. The personal authentication medium according to any one of 1 to 3.   The unevenness of the press plate is physically formed using at least one processing method selected from electron beam processing, YAG laser processing, plasma processing, carbon dioxide laser processing, excimer laser processing, chemical polishing, electrolytic processing, and photoetching processing. The personal authentication medium according to claim 4, wherein the personal authentication medium is formed by mechanical and / or chemical engraving.   The unevenness of the press plate is formed by forming the unevenness physically and / or chemically using at least one processing method selected from intaglio printing, relief printing, offset printing, and vapor deposition processing technology. The personal authentication medium according to claim 4, wherein the personal authentication medium is formed as follows.   The fine irregularities are formed by pressing a mesh or a sheet having a pattern different from the character and / or pattern on the surface of the press plate, thereby performing the character and / or pattern pattern, The personal authentication medium according to any one of claims 4 to 6, wherein the personal authentication medium has a composite pattern of a pattern different from the character and / or pattern pattern.   7. The substrate according to any one of claims 4 to 6, wherein the substrate is provided with fine unevenness on the fine uneven surface by a pattern different from the character and / or pattern pattern by machining. The personal authentication medium described in 1.   The personal authentication medium according to claim 8, wherein the machining is sandblasting.   Prepare a press plate on which at least one main surface is arranged in a letter and / or pattern pattern and on which fine irregularities having a height of 0.01 to 100 μm are formed, and the press plate and the substrate are brought into contact with each other A method for producing a personal authentication medium, characterized in that fine irregularities having a height of 0.01 to 100 μm are formed on the surface of the substrate by press working.   The unevenness of the press plate is physically formed using at least one processing method selected from electron beam processing, YAG laser processing, plasma processing, carbon dioxide laser processing, excimer laser processing, chemical polishing, electrolytic processing, and photoetching processing. The method according to claim 10, wherein the method is formed by mechanical and / or chemical engraving.   The unevenness of the press plate is formed by forming the unevenness physically and / or chemically using at least one processing method selected from intaglio printing, relief printing, offset printing, and vapor deposition processing technology. The method according to claim 10, wherein the method is formed.   On the surface of the press plate, a mesh or a sheet having a pattern different from the character and / or pattern is stacked and pressed, and the fine irregularities are formed on the character and / or pattern and the character. The method according to any one of claims 10 to 12, wherein the pattern is combined with a pattern different from the pattern.   The method according to any one of claims 10 to 13, wherein finer irregularities are provided on the surface of the fine irregularities on the surface of the press plate by machining.   The method according to claim 14, wherein the machining is sandblasting.

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