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WO2013146937A1 - Support d'impression filigrané pour prévention des contrefaçons - Google Patents

Support d'impression filigrané pour prévention des contrefaçons Download PDF

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Publication number
WO2013146937A1
WO2013146937A1 PCT/JP2013/059118 JP2013059118W WO2013146937A1 WO 2013146937 A1 WO2013146937 A1 WO 2013146937A1 JP 2013059118 W JP2013059118 W JP 2013059118W WO 2013146937 A1 WO2013146937 A1 WO 2013146937A1
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WO
WIPO (PCT)
Prior art keywords
opacity
antimony
cover sheet
tin oxide
confirmed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2013/059118
Other languages
English (en)
Japanese (ja)
Inventor
文人 小林
正太 川▲崎▼
博昭 島根
渉 吉住
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyodo Printing Co Ltd
Original Assignee
Kyodo Printing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kyodo Printing Co Ltd filed Critical Kyodo Printing Co Ltd
Publication of WO2013146937A1 publication Critical patent/WO2013146937A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • B42D25/333—Watermarks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • 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
    • B42D25/378—Special inks
    • B42D25/382—Special inks absorbing or reflecting infrared light
    • 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
    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
    • D21H21/44—Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
    • D21H21/48—Elements suited for physical verification, e.g. by irradiation
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30—Multi-ply
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • 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
    • B32B2554/00—Paper of special types, e.g. banknotes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/10—Watermarks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/64—Inorganic compounds

Definitions

  • the present invention relates to a watermarked anti-counterfeit print medium.
  • a watermarked print medium may be used.
  • a dandy roll or press roll is used in the paper making process, and a technology for engraving characters and patterns, or a transparent or translucent thin paper is bonded to the printing surface of a plastic sheet having characters and patterns printed thereon,
  • a technique (Patent Document 1) is known in which opaque paper is pasted on the back surface to make a watermark.
  • a paper having a watermark a laminated paper in which a synthetic resin film and paper are bonded together and a code for authenticity determination is printed with a printing ink containing carbon as an infrared absorbing pigment on the bonding surface is known ( Patent Document 2).
  • Patent Document 1 Japanese Utility Model Publication No. 49-14965
  • Patent Document 2 Japanese Patent Laid-Open No. 2-167771
  • Patent Document 1 When forming a watermark using dandy roll, it is necessary to create a watermark type in advance and attach it to the dandy roll, so it is difficult to handle a wide variety of watermark patterns, characters, or figures. It is difficult to determine the authenticity only by examining the state of the watermark.
  • the laminate of Patent Document 1 is obtained by stacking thin paper on a plastic sheet so that characters or patterns printed on the plastic sheet can be seen through. Although it is easy to deal with a wide variety of watermark patterns, characters or figures, since the thin paper is transparent or translucent, the printed characters and patterns can be seen without being transparent to light. For this reason, the laminated body of patent document 1 was not able to be used for the use aiming at forgery prevention.
  • the laminated paper of Patent Document 2 has a problem that since the carbon has a dark color, the code can be easily seen through the paper, and the watermark can be easily visually confirmed, so that it is easily forged. Therefore, in order to prevent counterfeiting, it is necessary to print a dummy pattern with a dye-type black ink having different infrared absorption characteristics around the code, which increases the labor and cost of manufacturing.
  • an object of the present invention is to provide a print medium having a watermark that can be visually confirmed when watermarked with natural light and can be effectively confirmed by means other than visual observation.
  • the present inventors have a printing layer of an ink containing an antimony-doped tin oxide pigment on a core sheet, and both surfaces of the core sheet are bonded with a cover sheet.
  • the watermark (print layer) cannot be confirmed under natural light (visible light) reflection conditions, but it can be confirmed through natural light, and it can be confirmed under infrared irradiation other than visible light.
  • the invention has been completed.
  • the present invention is a laminate having a core sheet, a cover sheet provided on both surfaces of the core sheet, and a printed layer containing an antimony-doped tin oxide pigment on at least one surface of the core sheet.
  • a watermarked anti-counterfeit print medium in which the relationship between the opacity x (%) and the solid content weight ratio y (wt%) of the antimony-doped tin oxide pigment satisfies the approximate expressions 1 and 2.
  • the opacity x of the cover sheet is preferably 62.7% or more and less than 100%.
  • the solid content weight ratio y of the antimony-doped tin oxide pigment contained in the printed layer is preferably 2.2% by weight or more and 28.3% by weight or less.
  • the present invention is also a laminate comprising a core sheet, cover sheets provided on both surfaces of the core sheet, and a printed layer containing an antimony-doped tin oxide pigment on at least one surface of the core sheet, and visible Provided is a watermarked anti-counterfeit print medium that cannot be confirmed under light (natural light) reflection conditions, but can be confirmed with either reflected light or transmitted light under conditions of transmission of visible light and irradiation of infrared light.
  • the watermarked anti-counterfeit print medium of the present invention is a laminate having a print layer in which a character or pattern is printed on a core sheet as a watermark, and thus can be applied to various character or pattern watermarks.
  • the watermark of the present invention cannot be confirmed at first glance under visible light, but can be confirmed by seeing through visible light, so that it has an anti-counterfeit effect.
  • the watermark pattern or character is printed using infrared absorbing ink, the authenticity can be determined by measuring the infrared absorptivity of the watermark pattern or character.
  • the watermarked anti-counterfeit printing medium includes a core sheet, a cover sheet provided on both sides of the core sheet, and a printed layer containing an antimony-doped tin oxide pigment on at least one side of the core sheet. Is the body. This printed layer cannot be confirmed under the condition of reflecting visible light, but can be confirmed under the condition of transmitting visible light and under irradiation of infrared light.
  • the core sheet and the cover sheet are fixed via an adhesive.
  • the core sheet is not particularly limited, and a synthetic resin film can be used.
  • the synthetic resin film is transparent or colored transparent made of polyester resin such as polyethylene terephthalate and polybutylene terephthalate, polyolefin resin such as polyethylene and polypropylene, acrylic resin, polystyrene resin, polyvinyl chloride resin, polyvinylidene chloride resin, etc. These films may be used, and may be a single-layer film or a multi-layer film made of different or similar resins.
  • the thickness of the core sheet is not particularly limited, but is usually in the range of 10 to 200 ⁇ m.
  • the opacity of the core sheet is more preferably less than or equal to the opacity of the cover sheet.
  • the opacity of the cover sheet is 62.7% or more and less than 100% and the opacity of the core sheet is less than or equal to the opacity of the cover sheet, a printed layer is formed only on one side of the core sheet. Even if it is, it can confirm similarly from both surfaces of a laminated body.
  • the opacity of the core sheet is higher than the opacity of the cover sheet, when the printed layer is formed only on one side of the core sheet, the laminate is formed with the side on which the printed layer is formed facing the eye.
  • the printed layer When watermarked with visible light, the printed layer can be confirmed without problems, but when watermarked from the opposite side, the printed layer cannot be confirmed or the image of what can be confirmed is blurred, and the watermark is the same from both sides of the laminate. Become invisible. Therefore, it is desirable to select the opacity of the core sheet lower than that of the cover sheet. However, when the printing layer is formed on both surfaces of the core sheet, such a problem does not occur, and therefore, the opacity of the core sheet does not need to be lower than the opacity of the cover sheet.
  • the cover sheet is preferably paper with an opacity of 62.7% or more and less than 100%. If the opacity is less than 62.7%, it is not preferable because the printed layer containing the antimony-doped tin oxide pigment in the lower layer can be seen easily even under visible light reflection conditions. Moreover, in order to transmit visible light, it is necessary to be less than 100%. It is desirable that the opacity of the cover sheets disposed on both sides of the core sheet is the same. If different opacity levels are used, the printed pattern will look different, which is not preferable.
  • the opacity is a value defined in JIS 8149 (ISO 2469), which is a numerical value obtained by quantifying the state in which the printed pattern on the underlay cannot be seen through a single blank sheet. The higher the value, the less visible it is. Represents. Generally, it is measured with a Hunter white meter.
  • the printing layer formed with the ink containing an antimony dope tin oxide pigment is provided in the one or both surfaces of the core sheet.
  • the print layer is a pattern and / or characters printed on the core sheet. And both surfaces of the core sheet which has a printing layer are bonded together with the cover sheet, and a printing layer will be covered with a cover sheet.
  • the antimony-doped tin oxide pigment is obtained by mixing an antimony oxide powder and a tin oxide powder with water, drying, and further pulverizing the powder obtained by adjusting the average particle diameter.
  • Antimony-doped tin oxide pigments may be used. Examples thereof include TDL (manufactured by JEMCO), T1 (manufactured by Mitsubishi Materials Corporation), and the like.
  • the printed layer contains resins and additives (such as antifoaming agents, dispersants, fillers, slip agents, anti-settling agents) that adjust the concentration of antimony-doped tin oxide pigments.
  • resins and additives such as antifoaming agents, dispersants, fillers, slip agents, anti-settling agents
  • the resin include vinyl resin, acrylic resin, polyester resin, polyamide resin, amino resin, epoxy resin, urethane resin, alkyd resin, and cyclohexanone resin.
  • the solid content weight ratio y (wt%) of the antimony-doped tin oxide pigment in the printing layer (weight of antimony-doped tin oxide pigment / weight of antimony-doped tin oxide pigment + resin weight)
  • solid content weight ratio y satisfies the following approximate expression 1 in relation to the opacity x (%) of the cover sheet.
  • This condition is a range where the print layer can be watermarked, although the print layer cannot be confirmed under the reflection condition of visible light, but can be confirmed in a state of being watermarked in visible light (under transmitted light).
  • the print layer Under the condition of Y> 0.6992x-41.6043, the printed layer can be seen without seeing through visible light. Under the condition of Y ⁇ 0.3320x-18.5943, the printed layer cannot be confirmed even when watermarked with visible light.
  • the opacity of the cover sheet is 62.6634% or more, and the solid content of the antimony-doped tin oxide pigment It can be understood that the weight ratio is 2.2099% by weight or more.
  • the upper limit of the opacity x is 100%, but the paper has less than 100%. If the opacity x of the cover sheet is 100%, the upper limit of the solid content weight ratio y of the antimony-doped tin oxide pigment is 28.3157% by weight from the left side of the approximate expression 1.
  • the approximate expression 1 is obtained by applying the least square method based on experimental data.
  • the range of the opacity x of the cover sheet is 62.7% or more and less than 100%. Further, the range of the solid content weight ratio of the antimony-doped tin oxide pigment may be not less than 2.2 wt% and not more than 28.3 wt%.
  • the opacity x of the cover sheet is 62.7% or more and less than 100%; if the solid content weight ratio of the antimony-doped tin oxide pigment is in the range of 2.2% by weight or more and 28.3% by weight or less, the printed layer is under the reflection condition of visible light Although it cannot be confirmed, it can be set as a watermarked anti-counterfeit print medium that can be confirmed in the state of being watermarked in light (under transmitted light).
  • the antimony-doped tin oxide pigment is a pigment having an infrared absorption effect.
  • the infrared absorption effect may be lost. is there.
  • the infrared absorption effect may not be lost. found.
  • the printed layer cannot be confirmed under visible light reflection conditions, but can be confirmed in a state of being watermarked in light (under transmitted light) and can be confirmed under infrared irradiation.
  • the print layer of the print medium satisfying the approximate expression 2 cannot be confirmed under the reflection condition of visible light, but can be confirmed in a state of being watermarked with light (under transmitted light) and under infrared irradiation.
  • this printing medium is irradiated with infrared rays and the transmitted light or reflected light is observed with an apparatus capable of visualizing infrared rays such as an infrared camera, the printed layer looks black and clear, and the portion where the printed layer does not exist looks white. This is because the antimony-doped tin oxide pigment contained in the printing layer absorbs infrared rays, and the portion where no printing layer exists does not absorb infrared rays.
  • the authenticity of the print medium can be determined by irradiating infrared rays and inspecting the pattern and / or characters of the print layer.
  • it is an apparatus which can measure the intensity
  • a printed layer can be confirmed under infrared irradiation. This makes it possible to determine the authenticity of the print medium.
  • “can be confirmed under infrared irradiation” means a result based on the observation of 10 persons, and all of them can confirm the shape of the pattern of the printed layer in black under infrared irradiation.
  • a method described later is applied as an observation method under infrared irradiation.
  • the printing medium satisfying the approximate expression 1 and the approximate expression 2 has a higher anti-counterfeit effect because it is difficult to identify that the print layer absorbs infrared rays in a state where visible light is watermarked (under transmitted light).
  • the approximate expression 2 is obtained by applying the least square method based on the experimental data.
  • the watermarked anti-counterfeit printing medium of this embodiment uses an ink composition containing an antimony-doped tin oxide pigment, forms a printing layer on one or both sides of the core sheet, and then bonds the core sheet and the cover sheet with an adhesive. Can be manufactured together.
  • the printing layer can be formed on the core sheet by using a conventionally known printing method such as gravure printing, silk screen printing, flexographic printing, offset printing, and ink jet printing.
  • the ink composition comprises an antimony-doped tin oxide pigment, medium and a solvent.
  • the medium contains the above-mentioned resin, and the solvent is for adjusting the viscosity of the ink composition, and uses an organic solvent according to the characteristics of the core sheet or cover sheet to be printed and the printing method. can do.
  • the solid content weight ratio y of the antimony-doped tin oxide pigment may be adjusted so as to satisfy the conditions of the approximate expression 1 and the approximate expression 2 at 2.2 wt% or more and 28.3 wt% or less. .
  • the opacity x of the cover sheet is 62.7% or more and less than 100%.
  • the adhesive is not particularly limited, but preferably does not contain a colorant, and may be any adhesive that can bond the core sheet and the cover sheet.
  • the conditions under which the watermark of the printing medium was established were examined by changing the solid content weight ratio of the antimony-doped tin oxide pigment and the opacity of the cover sheet.
  • the ink composition consists of antimony-doped tin oxide pigment (T1, manufactured by Mitsubishi Materials Corporation), medium (vinyl ink H-type halftone, manufactured by Jujo Chemical Co., Ltd.), and solvent (vinyl standard solvent, Jujo Chemical Co., Ltd.). )) (0.2 parts by weight relative to 1 part by weight of the medium)) and a solid content weight ratio of antimony-doped tin oxide in the print layer of the print medium is 9.1 to 28.6. %.
  • OK quality paper and OK Prince quality paper (both manufactured by Oji Paper Co., Ltd.) shown in Table 1 were used.
  • the opacity of the cover sheet was measured according to JIS8149.
  • Silk screen printing (10 ⁇ m film thickness after drying) using an ink composition on one side of a polyester film (NF-PET50, manufactured by Lintec Corporation, thickness 50 ⁇ m, opacity less than 30%) Cover sheets were bonded to both surfaces using a spray paste 55 manufactured by Sumitomo 3M Co. to obtain a laminate.
  • samples of various laminates were prepared by changing the solid content weight ratio of antimony-doped tin oxide within a range of 9.1 to 28.6%.
  • the conditions under which the watermark was established were examined by the following methods (1) and (2).
  • (1) Determination of conditions under which the printed layer under the cover sheet cannot be confirmed under visible light reflection conditions The laminate was placed on a standard type color stand (part number: 123060, manufactured by Ayase Digital Create), and it was judged from both sides whether the printed layer could be seen through the cover sheet with the fluorescent lamp lit. Judgment is performed by 10 observers, and when all 10 persons can see the printed layer from at least one side of the front and back, it is judged as “can be confirmed”, and in other cases, “cannot be confirmed”. It was judged.
  • Table 2 shows the maximum value of the solid content weight ratio of the antimony-doped tin oxide pigment determined that the printed layer cannot be confirmed for each opacity of the cover sheet as “upper limit value”.
  • the solid content weight ratio of the antimony-doped tin oxide pigment is less than or equal to this upper limit, the printed layer cannot be confirmed under visible light reflection conditions, but the solid content weight ratio of the antimony-doped tin oxide pigment is higher than this upper limit. In this case, it is determined that the print layer can be confirmed.
  • the opacity of the cover sheet was 82.6% to 99.9%
  • the upper limit value of the solid content weight ratio of the antimony-doped tin oxide pigment was distributed in the range of 16.7 to 28.6% by weight.
  • Table 3 shows the minimum value of the solid content weight ratio of the antimony-doped tin oxide pigment determined to be able to confirm the printed layer by transmitting the laminate with visible light for each opacity of the cover sheet.
  • the solid content weight ratio of the antimony-doped tin oxide pigment is not less than this lower limit value, the printed layer can be confirmed in a visible light transmission state, but when the solid content weight ratio of the antimony-doped tin oxide pigment is lower than this lower limit value. It is determined that the print layer cannot be confirmed.
  • the opacity of the cover sheet was 81.9% to 99.9%, the lower limit of the solid content weight ratio of the antimony-doped tin oxide pigment was distributed in the range of 9.1 to 14.3% by weight.
  • FIG. 1 shows a straight line representing an approximate expression obtained using the least square method from the results of the opacity of the cover sheet and the solid content weight ratio of the antimony-doped tin oxide pigment shown in Tables 2 and 3.
  • the region above the straight line of reference numeral 1 is a range in which the printed layer can be easily confirmed under the visible light reflection condition.
  • the region below the straight line of reference numeral 2 is a range that cannot be confirmed even when the print layer transmits visible light.
  • the layered body in the region between the straight line 1 and the straight line 2 that is, in the range of 0.6992x ⁇ 41.6043 ⁇ y ⁇ 0.3320x ⁇ 18.55943 (which is approximate expression 1) is
  • the printed layer cannot be confirmed under visible light reflection conditions, but the printed layer can be confirmed when transmitted through visible light.
  • the straight line 1 and the straight line 2 are straight lines representing approximate expressions obtained by the least square method using the lower limit value or the upper limit value obtained in this example.
  • the lower limit value or the upper limit value shown in Table 3 is not necessarily distributed on each straight line, but is distributed with a certain width.
  • Example 1 For the laminate obtained in Example 1, the conditions under which the printed layer covered with the cover sheet could be confirmed under infrared irradiation were examined.
  • the layered product Place the layered product on the stand of the standard type color viewing table (product number: 123060, manufactured by Ayase Digital Create), irradiate the layered product with infrared light in the wavelength range of 800 to 1000 nm without turning on the fluorescent lamp, and infrared camera (YASHICA Observation was performed in the infrared night mode of EZ Digital F537IR, manufactured by EXE MODE Co., Ltd., and it was determined whether the print layer could be confirmed.
  • the infrared light source was installed in the infrared camera, and the distance between the sample and the infrared camera was 5 cm.
  • the determination is performed by 10 observers, and infrared rays are absorbed by the print layer, and the image of the print layer is black, and the portion where the print layer is not formed is imaged white, so that all 10 people are printed layers.
  • the shape of the print layer it was judged as “can be confirmed”, and when even one person could not see the shape of the printed layer, it was judged as “cannot be confirmed”.
  • Table 4 shows the minimum solid content weight ratio (lower limit value) of the antimony-doped tin oxide pigment that can confirm the printed layer by irradiating the laminate with infrared rays for each opacity of the cover sheet.
  • the lower limit of the solid content weight ratio of the antimony-doped tin oxide pigment was in the range of 9.1 to 21.1% by weight.
  • FIG. 2 shows a straight line representing an approximate expression obtained from the results of Table 4.
  • a region above the reference numeral 3 is a range in which infrared absorption can be determined.
  • the straight line 3 represents an approximate expression obtained by the least square method using the lower limit value obtained in this embodiment, and the lower limit value is always on each straight line. It is not distributed but distributed with a certain distance.
  • FIG. 3 also shows the straight lines of approximate expression 1 and approximate expression 2.
  • the area below the straight line of reference numeral 1 and the area above each of the straight lines of reference numerals 2 and 3 indicates that “the printed layer cannot be confirmed under visible light reflection conditions, but visible light It is the range that can be confirmed under the condition of passing through and under infrared irradiation.
  • the upper limit value of the solid content weight ratio y of the antimony-doped tin oxide pigment is 28.3157% by weight from the left side of the approximate expression 1 when the opacity x of the cover sheet is 100% (see FIG. Corresponds to a solid content ratio value of 1 corresponding to 100% transparency). Therefore, in the present invention, “the range in which the printed layer cannot be confirmed under visible light reflection conditions but can be confirmed under visible light transmission conditions and under infrared irradiation” has an opacity x of the cover sheet of 62. 7% or more and less than 100%, and the solid content weight ratio y of the antimony-doped tin oxide pigment is 2.2% by weight or more and 28.3% by weight or less.
  • Carbon black Mitsubishi Chemical Corporation
  • medium vinyl ink H-type halftone, manufactured by Jujo Chemical Co., Ltd.
  • solvent vinyl standard solvent, Jujo Chemical ( Co., Ltd.
  • the ink composition was prepared so that the weight ratio of carbon black contained in the printed layer of the laminate was 0.15 to 3.0%. Moreover, the same OK fine paper and OK Prince fine paper as Example 1 were used for the cover sheet.
  • Example 2 The same conditions as in Example 1 were used, and it was determined whether the print layer could be confirmed by changing the solid weight ratio of carbon black when using a cover sheet of each opacity.
  • the opacity of the cover sheet was 91% or less, the hue of carbon black was so dark that even if the density was reduced, the printed layer could be seen and did not form a watermark.
  • Table 5 shows the upper and lower limits of the solid content weight ratio of carbon black in a laminate using a cover sheet having an opacity of 91% or more. Moreover, the straight line showing the approximate expression calculated
  • Reference numeral 12 is a straight line representing an approximate expression obtained from the lower limit of the opacity of the cover sheet and the solid weight ratio of carbon black in Table 5. In the region below the straight line of reference numeral 12, the solid weight ratio of the carbon black is too small, so that the color of the print layer becomes light and the print layer cannot be confirmed even under visible light transmission conditions.
  • Reference numeral 13 in FIG. 5 is a straight line representing an approximate expression obtained from the lower limit of the solid content weight ratio of the carbon black and the opacity with which the printed layer can be confirmed under infrared irradiation in Table 6.
  • the area above the reference numeral 13 is a range in which the printed layer can be confirmed under infrared irradiation.
  • the amount of carbon black (solid content weight ratio) is too small, the color of the print layer is light and the print layer cannot be confirmed under infrared irradiation.
  • FIG. 6 shows the straight line in FIG. 4 and the straight line in FIG. 5 together. Unlike FIG. 3, in FIG. 6, there is no coexistence of a region where the range where the watermark is formed and the range where the print layer can be confirmed under infrared irradiation. In other words, when carbon black is used as an infrared absorbing material, the printed layer cannot be confirmed under visible light reflection conditions, but the printed layer can be confirmed under visible light transmission conditions and under infrared irradiation. It can be seen that a print medium for use cannot be obtained.
  • Sample No. 1 The opacity of the core sheet is lower than the opacity of the cover sheet (80%) and the lower limit (about 62%) at which the watermark under visible light and the printed layer under infrared irradiation can be confirmed.
  • Sample number 2 The opacity of the core sheet is higher than the opacity of the cover sheet (80%) and the lower limit (about 62%) at which the watermark under visible light and the printed layer under infrared irradiation can be confirmed.
  • Sample number 3 The opacity of the core sheet is lower than the opacity of the cover sheet (80%) and higher than the lower limit (about 62%) at which the watermark can be confirmed under visible light and the printed layer under infrared irradiation. .
  • Example 9 shows the results of the infrared absorption determination performed at.
  • ⁇ indicates that “the watermark was confirmed from both sides in the visible light transmission state” or “the infrared absorbing layer was confirmed from both sides under infrared irradiation”, and the ⁇ indicates “from one side The watermark has been confirmed.

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  • Manufacturing & Machinery (AREA)
  • General Chemical & Material Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Printing Methods (AREA)
  • Credit Cards Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Paper (AREA)
PCT/JP2013/059118 2012-03-28 2013-03-27 Support d'impression filigrané pour prévention des contrefaçons Ceased WO2013146937A1 (fr)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015068280A1 (fr) * 2013-11-08 2015-05-14 共同印刷株式会社 Encre d'héliogravure absorbant les infrarouges
WO2015068276A1 (fr) * 2013-11-08 2015-05-14 共同印刷株式会社 Encre pour l'impression flexographique absorbant le rayonnement infrarouge
WO2015068283A1 (fr) * 2013-11-08 2015-05-14 共同印刷株式会社 Encre pour impression offset absorbant dans l'infrarouge
WO2015068292A1 (fr) * 2013-11-08 2015-05-14 共同印刷株式会社 Article imprimé
WO2015068290A1 (fr) * 2013-11-08 2015-05-14 共同印刷株式会社 Encre pour impression en creux absorbant les infrarouges
WO2015068291A1 (fr) * 2013-11-08 2015-05-14 共同印刷株式会社 Article imprimé
WO2015068281A1 (fr) * 2013-11-08 2015-05-14 共同印刷株式会社 Encre pour sérigraphie à absorption dans l'infrarouge
WO2015068282A1 (fr) * 2013-11-08 2015-05-14 共同印刷株式会社 Encre pour l'impression par jet d'encre absorbant le rayonnement infrarouge
WO2015068289A1 (fr) * 2013-11-08 2015-05-14 共同印刷株式会社 Encre pour impression typographique absorbant les infrarouges

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6125176U (ja) * 1984-07-19 1986-02-14 凸版印刷株式会社 カ−ド
JP2009137088A (ja) * 2007-12-05 2009-06-25 Kyodo Printing Co Ltd 印刷物及び赤外線吸収インキを用いた印刷方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6125176U (ja) * 1984-07-19 1986-02-14 凸版印刷株式会社 カ−ド
JP2009137088A (ja) * 2007-12-05 2009-06-25 Kyodo Printing Co Ltd 印刷物及び赤外線吸収インキを用いた印刷方法

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015068280A1 (fr) * 2013-11-08 2015-05-14 共同印刷株式会社 Encre d'héliogravure absorbant les infrarouges
WO2015068276A1 (fr) * 2013-11-08 2015-05-14 共同印刷株式会社 Encre pour l'impression flexographique absorbant le rayonnement infrarouge
WO2015068283A1 (fr) * 2013-11-08 2015-05-14 共同印刷株式会社 Encre pour impression offset absorbant dans l'infrarouge
WO2015068292A1 (fr) * 2013-11-08 2015-05-14 共同印刷株式会社 Article imprimé
WO2015068290A1 (fr) * 2013-11-08 2015-05-14 共同印刷株式会社 Encre pour impression en creux absorbant les infrarouges
WO2015068291A1 (fr) * 2013-11-08 2015-05-14 共同印刷株式会社 Article imprimé
WO2015068281A1 (fr) * 2013-11-08 2015-05-14 共同印刷株式会社 Encre pour sérigraphie à absorption dans l'infrarouge
WO2015068282A1 (fr) * 2013-11-08 2015-05-14 共同印刷株式会社 Encre pour l'impression par jet d'encre absorbant le rayonnement infrarouge
WO2015068289A1 (fr) * 2013-11-08 2015-05-14 共同印刷株式会社 Encre pour impression typographique absorbant les infrarouges

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