JP5760444B2 - Anti-tamper medium and method for manufacturing tamper-proof medium - Google Patents
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- Thermal Transfer Or Thermal Recording In General (AREA)
Description
本発明は、セキュリティ性を必要とするＩＤ情報を含む媒体とホログラムに代表されるＯＶＤ（Ｏｐｔｉｃａｌ Ｖａｒｉａｂｌｅ Ｄｅｖｉｃｅ）を有する転写箔とからなる改竄防止媒体とその改竄防止媒体の製造方法に関する。 The present invention relates to a falsification preventing medium comprising a medium including ID information requiring security and a transfer foil having an OVD (Optical Variable Device) represented by a hologram, and a method of manufacturing the falsification preventing medium.
旅券や運転免許証など、セキュリティ性を必要とするＩＤ情報を含む媒体には、しばしば印刷技術や転写技術、又はそれ以外の加工技術を用いて偽造及び改竄並びに変造の防止が行われる。その中で光の干渉を用いて立体画像や特殊な装飾画像を表現し得る、ホログラムや回折格子、光学特性の異なる薄膜を重ねることにより、見る角度により色の変化を生じる多層薄膜の様なＯＶＤの加工が施されることが多い。 Forgery, falsification, and alteration prevention are often performed on a medium including ID information that requires security, such as a passport or a driver's license, using printing technology, transfer technology, or other processing technology. OVD like multilayer thin film that changes color depending on viewing angle by overlaying holograms, diffraction gratings, and thin films with different optical properties, which can express stereoscopic images and special decoration images using light interference. Is often applied.
また、偽造及び改竄並びに変造を防止するための技術として、基材の表面を透過して内側にレーザー光を照射し、基材内部を炭化させることで、肖像などの固有の像を基材内部に形成する技術がある。これは主にポリカーボネートやＰＥＴなどのプラスチック基材に対して施され、近年個人を特定し認証するＩＤ情報を含む運転免許証や旅券などのセキュリティが求められる媒体に広く用いられている。 In addition, as a technology to prevent forgery, tampering and alteration, a unique image such as a portrait is created inside the substrate by transmitting the surface of the substrate and irradiating the inside with laser light to carbonize the inside of the substrate. There is technology to form. This is mainly applied to plastic base materials such as polycarbonate and PET, and has been widely used in recent years for media that require security such as driver's licenses and passports that include ID information for identifying and authenticating individuals.
カード積層体の内部のカードコアにレーザー光線照射発色層を設け、カード表面を傷つけることなく、カード内部に印字をおこなうことで、カード表面からの改竄をおこなうことを防止することが提案されている（特許文献１）。 It has been proposed to prevent tampering from the card surface by providing a laser beam irradiation coloring layer on the card core inside the card laminate and printing inside the card without damaging the card surface ( Patent Document 1).
しかしながら、近年印刷技術やホログラムの偽造手法だけでなく、レーザー光を用いた改竄手法も多岐に渡って提案されている。基材の内部を炭化させ、炭化による色変化により像を形成する偽造防止手法があるが、基材を表面から切削し、像を物理的に破壊するといった偽造が可能であり、さらには、レーザー光で発色する顔料が使われているため、追加のレーザー光を照射して像を改竄することが行われてしまうため、偽造防止効果が十分でないとされている。 However, in recent years, not only printing techniques and hologram forgery techniques, but also various tampering techniques using laser light have been proposed. There is an anti-counterfeiting method that carbonizes the inside of the substrate and forms an image by color change due to carbonization, but it is possible to counterfeit by cutting the substrate from the surface and physically destroying the image, and laser Since a pigment that develops color by light is used, the image is altered by irradiating additional laser light, so that the effect of preventing forgery is not sufficient.
本発明は、かかる従来技術における上記偽造及び改竄、並びに変造の問題を解決するものであり、その課題とするところは、レーザー光による追記が不可能であり、改竄を防止できる媒体と、その製造方法を提供することにより、高い偽造防止効果を実現することにある。 The present invention solves the problems of forgery and falsification and alteration in the prior art, and the subject is a medium that cannot be additionally written with a laser beam and can prevent falsification, and its manufacture By providing a method, it is to realize a high anti-counterfeit effect.
上記の課題を解決するための手段として、請求項１に記載の発明は、少なくともレーザー光により炭化するコア基材と、特定の強度以上の光照射で、発色するか変色する発色層からなり、レーザー光を照射し、前記コア基材層に画像情報や文字情報を記録した画像形成部を形成し、前記発色層を前記画像形成部上に設けたことを特徴とする改竄防止媒体である。
As means for solving the above-mentioned problems, the invention according to claim 1 comprises a core substrate that is carbonized by at least laser light, and a coloring layer that develops or changes color when irradiated with light of a specific intensity or more, An anti-tampering medium characterized in that an image forming portion in which image information and character information are recorded is formed on the core base material layer by irradiating a laser beam, and the coloring layer is provided on the image forming portion.
上記の課題を解決するための手段として、請求項２に記載の発明は、基材がレーザー光を透過する表面基材とレーザー光により炭化するコア基材と裏面基材の少なくとも３層からなる積層基材であり、
且つ発色層が特定の強度以上の光照射で、発色するか変色する層を持つＯＶＤ転写体であることと、
レーザー光を照射し、前記表面基材に影響を与えずに、前記コア基材に画像情報や文字情報を記録した画像形成部を形成し、
前記ＯＶＤ転写体を前記画像形成部上の前記表面基材に設けたことを特徴とする改竄防止媒体である。
As a means for solving the above-mentioned problems, the invention according to claim 2 is composed of at least three layers of a surface base material that transmits laser light, a core base material that is carbonized by laser light, and a back surface base material. A laminated substrate,
And the coloring layer is an OVD transfer body having a layer that develops or changes color when irradiated with light having a specific intensity or higher ,
Irradiating the record Za light, without affecting the surface substrate to form an image forming unit which records image information and character information to the core substrate,
The falsification preventing medium is characterized in that the OVD transfer member is provided on the surface base material on the image forming unit .
上記の課題を解決するための手段として、請求項３に記載の発明は、レーザー光により炭化する前記コア基材にレーザー光を照射して、画像情報や文字情報を記録し画像形成部を形成する工程と、特定の強度以上の光照射で、発色するか変色する層を、レーザー光により炭化する前記コア基材にレーザー光を照射して画像情報や文字情報を前記コア基材に記録する前記工程の後に画像形成部上に設ける工程とからなることを特徴とする請求項１に記載の改竄防止媒体の製造方法である。
As means for solving the above-mentioned problems, the invention according to claim 3 is characterized in that the core base material that is carbonized by laser light is irradiated with laser light to record image information and character information to form an image forming portion. Irradiating the core base material that is carbonized with laser light to record the image information and the character information on the core base material . The method for manufacturing a falsification preventing medium according to claim 1, further comprising a step of providing on the image forming unit after the step .
上記の課題を解決するための手段として、請求項４に記載の発明は、レーザー光を透過する表面基材とレーザー光により炭化するコア基材と裏面基材の少なくとも３層からなる積層基材を作製する工程と、
レーザー光を照射して、表面基材に影響を与えずに積層基材内部のコア基材に画像情報や文字情報を記録し画像形成部を形成する工程と、
特定の強度以上の光照射で、発色するか変色する層を持つＯＶＤ転写体を、レーザー光により炭化する前記コア基材にレーザー光を照射して画像情報や文字情報を前記コア基材に記録する前記工程の後に、画像形成部上の前記表面基材に設ける工程からなることを特徴とする請求項２に記載の改竄防止媒体の製造方法である。
As a means for solving the above-mentioned problems, the invention according to claim 4 is a laminated base material comprising at least three layers of a surface base material that transmits laser light, a core base material that is carbonized by laser light, and a back surface base material. A step of producing
Irradiating laser light, recording image information and character information on the core substrate inside the laminated substrate without affecting the surface substrate, and forming an image forming unit ;
An OVD transfer body having a layer that develops or changes color when irradiated with light of a specific intensity or higher is recorded on the core substrate by irradiating the core substrate carbonized by laser light with laser light. 3. The method for manufacturing a falsification preventing medium according to claim 2, further comprising a step of providing the surface base material on the image forming unit after the step of performing the step.
本発明により、レーザー光の照射により積層基材内に形成された像を改竄しようとする場合、ＯＶＤ転写体の発色層がレーザー光により発色や変色するために、改竄の痕跡となって残ってしまう。よってＯＶＤ転写体の発色層を含まない転写箔を有する基材と比較して、偽造及び改竄、並びに変造が困難な改竄防止媒体を得ることができる。 According to the present invention, when an image formed in a laminated substrate by laser light irradiation is to be tampered with, the coloring layer of the OVD transfer body is colored or discolored by the laser beam, and remains as a trace of tampering. End up. Therefore, it is possible to obtain a falsification preventing medium that is difficult to counterfeit, falsify, and tamper as compared to a substrate having a transfer foil that does not include a color developing layer of an OVD transfer body.
以下本発明を実施するための形態を、図面を用いて詳細に説明する。図１は、本発明の改竄防止媒体１の一実施形態を示す断面概念図である。図１に示す様に、本発明の改竄防止媒体１は、少なくとも表面基材２と、コア基材３と、裏面基材４の３層からなり、コア基材３は、表面基材２を通過するレーザー光を照射することにより、表面が炭化し、画像形成部５が印字される。情報が印字された後に、追記を不可能とする発色層９、ＯＶＤ層８、反射層７、接着層６からなるＯＶＤ転写箔１０を転写する構成である。 DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. FIG. 1 is a conceptual cross-sectional view showing an embodiment of a falsification preventing medium 1 of the present invention. As shown in FIG. 1, the anti-tamper medium 1 of the present invention includes at least three layers of a front surface base material 2, a core base material 3, and a back surface base material 4. By irradiating the passing laser beam, the surface is carbonized and the image forming unit 5 is printed. After the information is printed, the OVD transfer foil 10 composed of the coloring layer 9, the OVD layer 8, the reflective layer 7, and the adhesive layer 6 that cannot be additionally written is transferred.
表面基材２はレーザー光を透過するため、レーザー照射による影響はなく、コア基材３はレーザー光により炭化し、画像形成部５を形成でき、画像情報や文字情報を記録することができる。
Since the surface substrate 2 is transmitted through the laser beam is not affected by the laser irradiation, the core material 3 is carbonized by the laser beam, it can form images forming section 5, image information and character information can be recorded .
画像情報や文字情報を記録し、画像形成部５を形成した後に、画像形成部５上の表面基材２に接着層６、反射層７、回折格子層８、発色層９からなる転写箔１０を設けて、改竄防止媒体１が形成される。 After recording image information and character information and forming the image forming portion 5, a transfer foil 10 comprising an adhesive layer 6, a reflective layer 7, a diffraction grating layer 8, and a coloring layer 9 on the surface substrate 2 on the image forming portion 5. Are provided to form the falsification preventing medium 1.
表面基材２は透明で、レーザー光を透過するカードやパスポート製造に用いられるプラスチック素材（ＰＥＴ、ポリカーボネート、ポリプロピレン等）を基材として用いることができる。裏面基材４は表面基材２やコア基材３と同じでも別の材料でもかまわない。 The surface base material 2 is transparent, and a plastic material (PET, polycarbonate, polypropylene, etc.) used for manufacturing a card or passport that transmits laser light can be used as the base material. The back substrate 4 may be the same as or different from the surface substrate 2 and the core substrate 3.
この時、裏面基材４に表面基材２と同じ材料を用いると、裏面からもレーザー光を用いてコア基材３に画像形成部５を設けることができる。 At this time, if the same material as that of the front surface base material 2 is used for the back surface base material 4, the image forming portion 5 can be provided on the core base material 3 using laser light from the back surface.
コア基材３には白色のプラスチック素材（ＰＥＴ、ポリカーボネート、ポリプロピレン等）を用いることができる。この時光発色層を設けても良く、設けることにより低エネルギーのレーザー光での印字が可能となるが、白色剤が混練された白色のプラスチック素材は、レーザー照射により炭化し、黒、黒褐色になり、発色層がなくても良い。 A white plastic material (PET, polycarbonate, polypropylene, etc.) can be used for the core substrate 3. At this time, a photochromic layer may be provided, so that printing with a low-energy laser beam is possible, but the white plastic material kneaded with the white agent is carbonized by laser irradiation and becomes black, black-brown. The coloring layer may be omitted.
転写箔１０については、ホログラム製造に一般的に用いられる接着層６、反射層７、ＯＶＤ層８の形成に用いられる樹脂類及び金属類等を用いることができる。 For the transfer foil 10, resins and metals used for forming the adhesive layer 6, the reflective layer 7, and the OVD layer 8 that are generally used for hologram production can be used.
接着層６は、ポリエステル樹脂、アクリル樹脂、塩化ビニル樹脂、ポリアミド樹脂、ポリ酢酸ビニル樹脂、ゴム系樹脂、エチレン−酢酸ビニル共重合樹脂、塩化ビニル酢酸共重合樹脂等の熱可塑性樹脂が使用できる。膜厚は１〜２０μｍが好ましい。 For the adhesive layer 6, thermoplastic resins such as polyester resin, acrylic resin, vinyl chloride resin, polyamide resin, polyvinyl acetate resin, rubber resin, ethylene-vinyl acetate copolymer resin, vinyl chloride acetate copolymer resin can be used. The film thickness is preferably 1 to 20 μm.
反射層７にはアルミニウム、金、銀、銅及びこれらの金属を含む合金や、ＴｉＯ２、Ｓｉ２Ｏ３、ＳｉＯ、Ｆｅ２Ｏ３、ＺｎＳ等の金属酸化物や硫化物を使用することができ、厚みとしては１００Å〜１０００Åが好ましい。 The reflective layer 7 may be made of aluminum, gold, silver, copper, an alloy containing these metals, or a metal oxide or sulfide such as TiO 2 , Si 2 O 3 , SiO, Fe 2 O 3 , or ZnS. The thickness is preferably 100 to 1000 mm.
ＯＶＤ層は熱可塑性樹脂、熱硬化性樹脂、紫外線あるいは電子線硬化性樹脂等が使用できる。例えば、熱可塑性樹脂では、アクリル系樹脂、エポキシ系樹脂、セルロース系樹脂、ビニル系樹脂等が挙げられる。 For the OVD layer, a thermoplastic resin, a thermosetting resin, an ultraviolet ray, an electron beam curable resin, or the like can be used. For example, acrylic resins include acrylic resins, epoxy resins, cellulose resins, vinyl resins, and the like.
また、反応性水酸基を有するアクリルポリオールやポリエステルポリオール等にポリイソシアネートを架橋剤として添加して架橋させたウレタン樹脂、メラミン系樹脂、フェノール系樹脂等が使用できる。また、紫外線あるいは電子線硬化性樹脂としては、エポキシ（メタ）アクリル、ウレタン（メタ）アクリレート等が使用でき、その厚さとしては０．５〜５．０μｍが好ましい。 In addition, urethane resins, melamine resins, phenol resins, and the like obtained by adding polyisocyanate as a crosslinking agent to an acrylic polyol or polyester polyol having a reactive hydroxyl group and crosslinking can be used. Further, as the ultraviolet ray or electron beam curable resin, epoxy (meth) acryl, urethane (meth) acrylate, or the like can be used, and the thickness is preferably 0.5 to 5.0 μm.
ＯＶＤ層の一例としては、回折格子が用いられる。回折格子は回折格子パターン記録した金属版を用い、ウレタン系樹脂を用い、ＰＥＴ基材上に溶剤にウレタン系樹脂を溶解させて調製した回折格子層形成塗液をコーテイングにより塗工し、乾燥を行って得られた回折格子形成層に加熱エンボスにより回折格子パターンを転写して形成される。 As an example of the OVD layer, a diffraction grating is used. The diffraction grating uses a metal plate recorded with a diffraction grating pattern, uses a urethane resin, coats a coating solution for forming a diffraction grating layer prepared by dissolving a urethane resin in a solvent on a PET base material, and dries. The diffraction grating pattern is formed by transferring the diffraction grating pattern to the diffraction grating forming layer obtained by heat embossing.
多層薄膜方式のＯＶＤとしては、屈折率の異なるＴｉＯ２、Ｓｉ２Ｏ３、ＳｉＯ、Ｆｅ２Ｏ３、ＺｎＳ、などの低高屈折率材を組合せ多層化したものであり、蒸着等の真空薄膜形成法のより作製され、見る角度によって反射色相が変化する。 The OVD of the multilayer thin film method is a multilayered combination of low and high refractive index materials such as TiO 2 , Si 2 O 3 , SiO, Fe 2 O 3 , ZnS, etc. having different refractive indexes. The reflection hue changes depending on the viewing angle.
本発明に係る改竄防止媒体１を製造するために、表面基材２と、コア基材３と、裏面基材４の３層からなる積層基材にレーザー光を照射し、コア基材２を炭化させて画像情報や文字情報である画像形成部５を記録し、発色層を含むホログラムからなるＯＶＤ転写箔１０を転写したカード状の改竄防止媒体１を用意した。 In order to manufacture the falsification preventing medium 1 according to the present invention, the laminated base material composed of three layers of the front surface base material 2, the core base material 3, and the back surface base material 4 is irradiated with laser light. A card-shaped falsification preventing medium 1 was prepared by recording the image forming unit 5 which is carbonized and recording image information and character information, and transferring an OVD transfer foil 10 made of a hologram including a coloring layer.
コア基材３には白色のポリカーボネート樹脂シートを用い、表面基材２と裏面基材４には無色のポリカーボネート樹脂シートを用い、２枚の透明なポリカーボネート樹脂シートの間に挟む構成とした。 A white polycarbonate resin sheet was used for the core substrate 3, and a colorless polycarbonate resin sheet was used for the front substrate 2 and the back substrate 4, and the structure was sandwiched between two transparent polycarbonate resin sheets.
作製した積層基材にレーザー光を照射し、白色のポリカーボネートからなるコア基材３
が炭化して黒色画像からなる画像形成部５を形成した。この時透明な表面基材２に着色や変形は生じない。
The produced laminated base material is irradiated with laser light, and the core base material 3 made of white polycarbonate
Was carbonized to form an image forming portion 5 consisting of a black image. At this time, the transparent surface base material 2 is not colored or deformed.
印字された画像形成部５上にはホログラムからなるＯＶＤ転写箔１０を転写した。ホログラムからなるＯＶＤ転写箔１０はウレタン系樹脂を用い回折格子を加熱エンボスにより形成しＯＶＤ層８を得た。反射層７にはＺｎＳからなる薄膜を真空蒸着により設け、接着層６には塩化ビニルと酢酸ビニルの共重合系樹脂を用いた。さらに発色層９を積層して作製した。発色層９にはレーザー発色インキ（東洋インキ製Ｅｌｂｉｍａ-Ｚ１１７）を用い、転写箔上にコーテイングにより塗布した。この時、発色層９を予め転写箔構成に含めることも可能であり、含めておく方がスポット転写後に加刷するより、発色層９を予め転写箔構成に含め一体にする方が歩留まり効率等が良い。 An OVD transfer foil 10 made of a hologram was transferred onto the printed image forming unit 5. The OVD transfer foil 10 made of a hologram was made of urethane resin and a diffraction grating was formed by heating embossing to obtain an OVD layer 8. A thin film made of ZnS was provided on the reflective layer 7 by vacuum deposition, and a vinyl chloride / vinyl acetate copolymer resin was used for the adhesive layer 6. Further, a coloring layer 9 was laminated to produce. A laser coloring ink (Elbima-Z117 manufactured by Toyo Ink) was used for the coloring layer 9 and applied onto the transfer foil by coating. At this time, the coloring layer 9 can be included in the transfer foil configuration in advance, and it is better to include the coloring layer 9 in the transfer foil configuration in advance than the printing after spot transfer. Is good.
引き続き作製した発色層９を持つ改竄防止媒体１の改竄検証をおこなった。ホログラムからなるＯＶＤ転写箔１０を転写した後、ＯＶＤ転写箔１０の上からレーザー光を照射して基材中の像に追記改竄を施した。その結果、レーザー発色インキからなる発色層１０が変色した部分が生じ、改竄したことが分かる。 Subsequently, falsification verification of the falsification preventing medium 1 having the coloring layer 9 produced was performed. After transferring the OVD transfer foil 10 made of a hologram, the image in the base material was additionally falsified by irradiating a laser beam on the OVD transfer foil 10. As a result, it can be seen that the colored layer 10 made of laser colored ink has been discolored and has been altered.
本発明に係る改竄防止媒体１と比較するために、実施形態にて示した積層媒体を用意し、レーザー光を照射し、白色のポリカーボネートからなるコア基材３が炭化し、黒色画像からなる画像形成部５を形成した。その上に発色層を含まないホログラム転写箔を転写したカードを用意した。 In order to compare with the falsification preventing medium 1 according to the present invention, the laminated medium shown in the embodiment is prepared, laser light is irradiated, the core substrate 3 made of white polycarbonate is carbonized, and the image is made of a black image. A forming portion 5 was formed. A card was prepared by transferring a hologram transfer foil containing no color developing layer thereon.
発色層を含まないホログラム転写箔を転写したカードに、ホログラム転写箔上からレーザー光を照射してコア基材３に追加印字を施した。発色層９を含まないホログラム転写箔には、発色や変色がなく、印字情報に追加が可能で改竄をおこなうことが可能であることがわかった。 Additional printing was performed on the core base material 3 by irradiating a laser beam onto the card on which the hologram transfer foil containing no coloring layer was transferred. It was found that the hologram transfer foil that does not include the coloring layer 9 has no coloring or discoloration, can be added to the printing information, and can be tampered with.
本発明の改竄防止媒体１は、ＩＤ情報を印字記録した媒体に、発色層９を持つＯＶＤ転写箔１０を転写することにより、その後の追加印字を不可能とすることができ、改竄を防止するものであり、旅券や運転免許証などのセキュリティが必要で、偽造及び改竄並びに変造防止求められる用途への使用が可能である。 The falsification preventing medium 1 of the present invention can make subsequent additional printing impossible by transferring the OVD transfer foil 10 having the coloring layer 9 to the medium on which the ID information is printed and recorded, thereby preventing falsification. It requires security such as passports and driver's licenses, and can be used for applications that require counterfeiting, falsification, and alteration prevention.
１・・・改竄防止媒体
２・・・表面基材
３・・・コア基材
４・・・裏面基材
５・・・像形成部
６・・・接着層
７・・・反射層
８・・・ＯＶＤ層
９・・・発色層
１０・・・ＯＶＤ転写箔
DESCRIPTION OF SYMBOLS 1 ... Anti-falsification medium 2 ... Front surface base material 3 ... Core base material 4 ... Back surface base material 5 ... Image formation part 6 ... Adhesive layer 7 ... Reflective layer 8 ... -OVD layer 9 ... coloring layer 10 ... OVD transfer foil
Claims (4)
且つ発色層が特定の強度以上の光照射で、発色するか変色する層を持つＯＶＤ転写体であることと、
レーザー光を照射し、前記表面基材に影響を与えずに、前記コア基材に画像情報や文字情報を記録した画像形成部を形成し、
前記ＯＶＤ転写体を前記画像形成部上の前記表面基材に設けたことを特徴とする改竄防止媒体。 The base material is a laminated base material composed of at least three layers of a front surface base material that transmits laser light, a core base material carbonized by laser light, and a back surface base material,
And the coloring layer is an OVD transfer body having a layer that develops or changes color when irradiated with light having a specific intensity or higher ,
Irradiating the record Za light, without affecting the surface substrate to form an image forming unit which records image information and character information to the core substrate,
An anti-tamper medium characterized in that the OVD transfer member is provided on the surface base material on the image forming unit .
レーザー光を照射して、表面基材に影響を与えずに積層基材内部のコア基材に画像情報や文字情報を記録し画像形成部を形成する工程と、
特定の強度以上の光照射で、発色するか変色する層を持つＯＶＤ転写体を、レーザー光により炭化する前記コア基材にレーザー光を照射して画像情報や文字情報を前記コア基材に記録する前記工程の後に、画像形成部上の前記表面基材に設ける工程からなることを特徴とする請求項２に記載の改竄防止媒体の製造方法。 A step of producing a laminated substrate composed of at least three layers of a surface substrate that transmits laser light, a core substrate that is carbonized by laser light, and a back substrate;
Irradiating laser light, recording image information and character information on the core substrate inside the laminated substrate without affecting the surface substrate, and forming an image forming unit ;
An OVD transfer body having a layer that develops or changes color when irradiated with light of a specific intensity or higher is recorded on the core substrate by irradiating the core substrate carbonized by laser light with laser light. 3. The method for manufacturing a falsification preventing medium according to claim 2, further comprising a step of providing the surface base material on the image forming unit after the step of performing.
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