JPWO2008133113A1 - Authenticity determination method, discriminator and polarizing plate - Google Patents

Authenticity determination method, discriminator and polarizing plate Download PDF

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JPWO2008133113A1
JPWO2008133113A1 JP2009511811A JP2009511811A JPWO2008133113A1 JP WO2008133113 A1 JPWO2008133113 A1 JP WO2008133113A1 JP 2009511811 A JP2009511811 A JP 2009511811A JP 2009511811 A JP2009511811 A JP 2009511811A JP WO2008133113 A1 JPWO2008133113 A1 JP WO2008133113A1
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authenticity determination
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JP5375603B2 (en
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芳吉 蘇本
芳吉 蘇本
伊藤　典之
典之 伊藤
村上　徹
徹 村上
高志 嶋村
高志 嶋村
真理 鈴木
真理 鈴木
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Toppan Inc
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/0005—Adaptation of holography to specific applications
    • G03H1/0011—Adaptation of holography to specific applications for security or authentication
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
    • G03H1/0252—Laminate comprising a hologram layer
    • G03H1/0256—Laminate comprising a hologram layer having specific functional layer
    • 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
    • B42D25/328—Diffraction gratings; Holograms
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2223/00—Optical components
    • G03H2223/14—Diffuser, e.g. lens array, random phase mask
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2250/00—Laminate comprising a hologram layer
    • G03H2250/42—Reflective layer

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Credit Cards Or The Like (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Polarising Elements (AREA)

Abstract

【課題】金属薄膜などの反射性薄膜層を有する偽造防止体の真偽判定において、金属光沢の影響を受けることなく、真偽の判定ができる方法、真偽判定用のツールを提供することを課題とする。【解決手段】少なくとも光反射性薄膜層と、偽造防止機能層とを有するシート状偽造防止構造体の真偽判定を識別器を用いて行う真偽判定方法であって、該シート状偽造防止構造体の真贋を判定するための光拡散性真偽判定層または、該シート状偽造防止構造体の真贋を判定するための真偽判定層と光拡散性層、を有する識別器を用いて真偽判定を行う真偽判定方法であり、該光拡散性真偽判定層または光拡散層のヘイズが５０〜９５％、全光線透過率が５０〜１００％であることを特徴とする真偽判定方法である。【選択図】図４[Object] To provide a method and a tool for authenticity determination that can determine authenticity without being affected by metallic luster in the determination of authenticity of a forgery prevention body having a reflective thin film layer such as a metal thin film. Let it be an issue. A method for determining the authenticity of a sheet-like anti-counterfeit structure having at least a light-reflective thin film layer and a forgery-preventing functional layer using a discriminator, the sheet-like anti-counterfeit structure Using a discriminator having a light diffusing authenticity determination layer for determining the authenticity of the body or a authenticity determining layer for determining the authenticity of the sheet-like forgery prevention structure and a light diffusing layer A method for determining authenticity, wherein the light diffusible authenticity determining layer or the light diffusing layer has a haze of 50 to 95% and a total light transmittance of 50 to 100%. It is. [Selection] Figure 4

Description

本発明は、偽造防止効果に優れた、例えばブランドプロテクションラベルのような偽造防止シート状構造体の真贋を判定するための真偽判定方法及び識別器に関する。   The present invention relates to an authenticity determination method and a discriminator for determining the authenticity of an anti-counterfeit sheet-like structure such as a brand protection label, which has an excellent anti-counterfeit effect.

近年、光の干渉を利用して立体画像や特殊な装飾画像を表現しうる、ホログラムや回折格子等でなる回折構造層は、その同一意匠の複製が困難なことから、セキュリティ用途として多く利用されており、例えば、このホログラム等回折構造層を有するシールを、カード、ビデオカセット、コンパクトディスク、スポーツ用品、ＣＤ−ＲＯＭ等のパッケージ、ブランド品等の表面に貼着し、その有無により物品が真正品か否かの真贋判定の手段として使用している。   In recent years, diffractive structure layers such as holograms and diffraction gratings, which can express stereoscopic images and special decorative images using light interference, are often used for security applications because it is difficult to duplicate the same design. For example, a sticker having a diffractive structure layer such as a hologram is stuck on the surface of a card, a video cassette, a compact disc, a sports equipment, a CD-ROM package, a brand product, etc. It is used as a means for determining whether or not the product is authentic.

また前記ホログラムや回折格子などでなる回折構造層は、その表面にアルミニウムなどの金属蒸着層を蒸着し光輝性を高めることが行われているが、この蒸着には高度の技術が必要となり、また蒸着するための装置も莫大な設備投資を必要とするので、蒸着そのものが偽造防止に大きな効果を有している。   In addition, the diffraction structure layer made of the hologram, diffraction grating, or the like is formed by depositing a metal vapor deposition layer such as aluminum on the surface to enhance the glitter, but this vapor deposition requires a high level of technology. Since the apparatus for vapor deposition also requires enormous capital investment, the vapor deposition itself has a great effect in preventing forgery.

従来、上記のようなホログラムで代表される回折構造層の真贋判定や蒸着層の判定を、通常は目視で行うか、あるいはルーペ等簡単な道具を用いて細部を検証して、より高い確度で行うことができるものであった。   Conventionally, the determination of the authenticity of the diffractive structure layer represented by the hologram as described above and the determination of the vapor-deposited layer are usually performed visually, or the details are verified using a simple tool such as a magnifying glass, with higher accuracy. It was something that could be done.

しかしながら、最近では上記ホログラム等回折構造層自体を偽造したものや蒸着層を偽造したものが出現するようになり、その偽造品は、目視では勿論、ルーペ等で細部を見てもその真贋の判定が難しく、ホログラム等回折構造層や蒸着層のみでは、簡易にかつ確度の高い真贋の判定をすることが困難となるという問題があるようになった。このような背景から、ホログラム等回折構造層や蒸着層に何らかの技術を付加した新たな偽造防止技術の開発が望まれており、種々提案されてきた。   However, recently, forgery of the diffraction structure layer such as the hologram and forgery of the vapor deposition layer have appeared, and the forgery of the forgery can be judged by looking at the details with a magnifying glass. However, it has become difficult to determine the authenticity easily and with high accuracy only by using a diffractive structure layer such as a hologram or a vapor deposition layer. From such a background, development of a new anti-counterfeiting technique in which some technique is added to a diffraction structure layer such as a hologram or a vapor deposition layer is desired, and various proposals have been made.

例えば、特許文献１には、基材上に、目視角度によって色が変化する多層薄膜層（セラミックや金属の薄膜層）を備え、かつその層間に文字等のパターン層を設けてなる偽造防止媒体が開示されている。
これは多層薄膜層の有する、観察する位置によって反射・透過特性が変化し、見える色が異なるカラーシフト（反射光の色変化）の効果が、パターン層の部分により多層薄膜層と異なる色の変化を示すため、目視により偽造・変造・改竄などの不正行為の事実を肉眼により簡単に判定することができるものである。また、偽造防止シール、偽造防止転写箔により商品券などの金券、有価証券等に貼付した場合、そのデザインを損ねることなく、カラーコピー等による不正行為を防止することが可能となると言う効果を有している。For example, Patent Document 1 discloses a forgery prevention medium provided with a multilayer thin film layer (ceramic or metal thin film layer) whose color changes depending on a viewing angle on a base material, and a pattern layer such as a character is provided between the layers. Is disclosed.
This is because the reflection / transmission characteristics of the multilayer thin film layer change depending on the observation position, and the effect of color shift (color change of reflected light) that differs in the visible color is different from the multilayer thin film layer depending on the pattern layer part. Therefore, the fact of fraud such as forgery, alteration, and alteration can be easily determined visually. In addition, when it is attached to money vouchers such as gift certificates, securities, etc. with anti-counterfeiting seals and anti-counterfeiting transfer foil, it has the effect that it is possible to prevent fraudulent acts such as color copying without damaging the design. is doing.

また、特許文献２には、基材の片面にシール用接着剤層が施され、その反対面には（転写用）接着層を介して微細凹凸パターン面に反射性薄膜層を有する回折構造層が転写されており、前記基材と（転写用）接着層の間にパターン状の脆質層が施されている回折構造層付シールが開示されている。
この回折構造層付シールは、本物であれば回折構造層の表面を粘着テープにより粘着剥離するかもしくは板状固形物等によりスクラッチオフした際に、パターン状の抜き部分が現出し、この抜き部分を目視により確認できるか否かに基づいてこのシールの真贋を判定することができる。
この回折構造層は、ホログラム等微細な凹凸パターン面にアルミニウム蒸着でなる反射性薄膜層が積層されているものやリップマンホログラムの層などを用いることができる。Patent Document 2 discloses a diffraction structure layer in which a sealing adhesive layer is applied to one surface of a base material, and a reflective thin film layer is provided on the surface of the fine unevenness via an adhesive layer (for transfer) on the opposite surface. Is disclosed, and a seal with a diffractive structure layer is disclosed in which a pattern-like brittle layer is provided between the base material and the (transfer) adhesive layer.
If this seal with a diffraction structure layer is genuine, when the surface of the diffraction structure layer is adhesively peeled off with an adhesive tape or scratched off with a plate-like solid or the like, a pattern-like punched-out portion appears, and this punched-out portion appears. The authenticity of this seal can be determined on the basis of whether or not it can be visually confirmed.
As the diffractive structure layer, a layer in which a reflective thin film layer formed by aluminum deposition is laminated on a fine uneven pattern surface such as a hologram, a Lippmann hologram layer, or the like can be used.

また、特許文献３には、支持体と、ホログラムパターンを有するホログラム形成層と、反射性薄膜層と、前記反射性薄膜層を覆う第１脆性剥離層及び接着層を順次設たホログラム脆性シールが開示されている。
このホログラム脆性シールは、支持体とホログラムパターンを有するホログラム形成層と、反射性薄膜層と、前記反射性薄膜層を部分的に覆う第１脆性剥離層及び接着層を順次設けると、シール貼着後の外部から第１脆性剥離層の存在の認識が困難であり、かつ故意による剥離に対してホログラムに部分的な脆性破壊を生じ、またホログラム再生画像が第１脆性剥離層の存在による影響を受けることがなく、不正防止性を向上させるという効果を有している。Patent Document 3 discloses a hologram brittle seal in which a support, a hologram forming layer having a hologram pattern, a reflective thin film layer, a first brittle release layer covering the reflective thin film layer, and an adhesive layer are sequentially provided. It is disclosed.
This hologram brittle seal has a support, a hologram forming layer having a hologram pattern, a reflective thin film layer, a first brittle release layer and an adhesive layer partially covering the reflective thin film layer, and a sticking adhesive. It is difficult to recognize the presence of the first brittle release layer from the outside later, and a partial brittle fracture occurs in the hologram against intentional release, and the hologram reproduction image is affected by the presence of the first brittle release layer. It has the effect of improving fraud prevention without being affected.

また、特許文献４には、潜像を付加したＯＶＤ形成媒体の偽造防止方法において、支持体の表面上にＯＶＤ層、潜像形成層が積層して形成されたＯＶＤ形成媒体の潜像形成層に、裸眼による目視では透明で偏光フィルムを用いた目視では可視可能な、配向された潜像部分を設けたＯＶＤ形成媒体について記載されている。   Patent Document 4 discloses a latent image forming layer of an OVD forming medium formed by laminating an OVD layer and a latent image forming layer on a surface of a support in a method for preventing forgery of an OVD forming medium to which a latent image is added. In addition, an OVD forming medium provided with an oriented latent image portion that is transparent when viewed with the naked eye and visible when viewed with a polarizing film is described.

また、特許文献５には、光反射性を有する光学層と、高分子液晶材料を含有し且つ光学層の一方の主面上に設けられた潜像形成層とを有し、潜像形成層は配向状態にある配向部と少なくとも１つの非配向部を有し、それら配向部及び非配向部は直接的な目視観察では識別不可能であり且つ偏光部材を介した目視観察で識別可能な潜像を構成した積層複合体、情報記録媒体、及び偽造防止性付与部材についての記載がある。   Patent Document 5 includes an optical layer having light reflectivity, and a latent image forming layer containing a polymer liquid crystal material and provided on one main surface of the optical layer, and the latent image forming layer. Has an oriented portion in an oriented state and at least one non-oriented portion, and the oriented portion and the non-oriented portion are indistinguishable by direct visual observation and can be discriminated by visual observation through a polarizing member. There is a description of a laminated composite, an information recording medium, and an anti-counterfeiting imparting member constituting an image.

これらの積層複合体、情報記録媒体、偽造防止性付与部材は、円偏光フィルムを介した目視観察では識別可能となる特徴を有している。また前記光反射性を有する光学層を形成する素材として各種金属の蒸着膜が例示されている。   These laminated composites, information recording media, and anti-counterfeiting imparting members have characteristics that can be identified by visual observation through a circularly polarizing film. Examples of materials for forming the optical layer having light reflectivity include vapor deposited films of various metals.

前記特許文献１の偽造防止媒体は、多層薄膜層が金属の薄膜層の場合、文字などのパターン層が、照明光が正反射する目視角度では、強い金属光沢感に影響されて見難くなると言う問題点があることが判った。   The anti-counterfeit medium of Patent Document 1 says that when the multilayer thin film layer is a metal thin film layer, the pattern layer such as letters is difficult to see at a viewing angle where the illumination light is regularly reflected and is affected by a strong metallic luster. It turns out that there is a problem.

また前記特許文献２の回折構造付シールや、特許文献３のホログラム脆性シールは、ホログラム画像が最も輝いて見える目視角度や照明光が正反射する目視角度以外の角度では、脆性破壊を生じて現出するパターン状の抜き部分を見ることができるが、ホログラム画像が最も輝いて見える目視角度や照明光が正反射する目視角度では、脆性破壊を生じて現出するパターン状の抜き部分が、強い金属光沢感に影響されて見難くなると言う問題点があることが判った。   Further, the diffractive structure-attached seal of Patent Document 2 and the hologram brittle seal of Patent Document 3 cause brittle fracture at angles other than the viewing angle at which the hologram image looks most brilliant and the viewing angle at which the illumination light is regularly reflected. You can see the pattern-shaped punched out part, but at the viewing angle where the hologram image looks most brilliant and the viewing angle where the illumination light is regularly reflected, the pattern-shaped punched part that appears after brittle fracture is strong. It was found that there was a problem that it was difficult to see due to the metallic luster.

また前記特許文献４のＯＶＤ形成媒体は、ＯＶＤ層上に形成された潜像形成層を、偏光フィルムを用いて見る際に、ＯＶＤが最も輝いて見える目視角度や照明光が正反射する目視角度では、強い金属光沢感に影響されて潜像形成層が見難くなると言う問題点があることが判った。   In addition, the OVD forming medium of Patent Document 4 has a viewing angle at which the OVD appears to be brightest and a viewing angle at which the illumination light is regularly reflected when the latent image forming layer formed on the OVD layer is viewed using a polarizing film. Then, it has been found that there is a problem that it is difficult to see the latent image forming layer due to the strong metallic gloss.

また前記特許文献５の情報記録媒体は、光学層の一方の主面上に設けられた潜像形成層を、円偏光フィルムを介して目視観察する際に、光学層が最も輝いて見える目視角度や照明光が正反射する目視角度では、強い金属光沢感に影響されて潜像形成層が見難くなると言う問題点があることが判った。   In addition, the information recording medium of Patent Document 5 has a viewing angle at which the optical layer looks most bright when the latent image forming layer provided on one main surface of the optical layer is visually observed through a circularly polarizing film. It has been found that there is a problem that the latent image forming layer becomes difficult to see due to a strong metallic luster at a viewing angle at which the illumination light is regularly reflected.

特開平０９−１５６１９８号公報JP 09-156198 A 特開２００７−０７８８０４号公報Japanese Patent Laid-Open No. 2007-07884 特開平０８−１５２８４２号公報Japanese Patent Laid-Open No. 08-152842 特開２００１−０６３３００号公報JP 2001-063300 A ＷＯ ００７２０５６／Ａ１公報WO 0072056 / A1 Publication

本発明は、前記の問題点を解決するためになされたものであって、金属薄膜などの反射性薄膜層を有する偽造防止体の真偽判定において、金属光沢の影響を受けることなく、真偽の判定ができる方法、真偽判定用のツールを提供することを課題とする。   The present invention has been made in order to solve the above-mentioned problems, and in authenticity determination of an anti-counterfeit body having a reflective thin film layer such as a metal thin film, the authenticity is not affected by the metallic luster. It is an object of the present invention to provide a method for determining whether or not, and a tool for determining authenticity.

請求項１記載の発明は、少なくとも光反射性薄膜層と、偽造防止機能層とを有するシート状偽造防止構造体の真偽判定を識別器を用いて行う真偽判定方法であって、該シート状偽造防止構造体の真贋を判定するための光拡散性真偽判定層または、該シート状偽造防止構造体の真贋を判定するための真偽判定層と光拡散性層、を有する識別器を用いて真偽判定を行う真偽判定方法であり、該光拡散性真偽判定層または光拡散層のヘイズが５０〜９５％、全光線透過率が５０〜１００％であることを特徴とする真偽判定方法である。   The invention according to claim 1 is an authenticity determination method for performing authenticity determination of a sheet-form anti-counterfeit structure having at least a light-reflective thin film layer and an anti-counterfeit function layer by using a discriminator. A light diffusible authenticity judgment layer for judging the authenticity of the anti-counterfeit structure or a discriminator having an authenticity judgment layer and a light diffusive layer for judging the authenticity of the sheet-like anti-counterfeit structure A true / false determination method for performing authenticity determination using the light diffusive authenticity determination layer or the light diffusion layer having a haze of 50 to 95% and a total light transmittance of 50 to 100%. This is a true / false determination method.

請求項２記載の発明は、前記シート状偽造防止構造体の偽造防止機能層が偏光材料を含む層であり、かつ該識別器の光拡散性真偽判定層または真偽判定層が偏光材料を含む層であることを特徴とする請求項１記載の真偽判定方法である。   According to a second aspect of the present invention, the anti-counterfeit function layer of the sheet-like anti-counterfeit structure is a layer containing a polarizing material, and the light diffusible authenticity determination layer or the authenticity determination layer of the discriminator is made of a polarizing material. The authenticity determination method according to claim 1, wherein the authenticity determination method is a layer that includes the layer.

請求項３記載の発明は、基材上に少なくとも光反射性薄膜層、該基材と光反射性薄膜層の間に脆質パターン層を有するシート状偽造防止構造体の真偽判定を識別器を用いて行う真偽判定方法であって、該シート状偽造防止構造体と粘着シートを貼り合わせ、該粘着テープを剥離することにより脆質パターン状に光拡散層を除去し、光拡散層を有する識別器を用いて真偽判定を行う真偽判定方法であり、該光拡散層のヘイズが５０〜９５％、全光線透過率が５０〜１００％であることを特徴とする真偽判定方法である。   According to a third aspect of the present invention, the authenticity determination of a sheet-form anti-counterfeit structure having at least a light-reflective thin film layer on a substrate and a brittle pattern layer between the substrate and the light-reflective thin film layer is performed. A method for determining whether the sheet is forged or counterfeited by bonding the sheet-form anti-counterfeit structure and the pressure-sensitive adhesive sheet, and removing the light-diffusing layer in a brittle pattern by peeling off the pressure-sensitive adhesive tape. A true / false determination method for performing true / false determination using a discriminator having the light diffusion layer, wherein the light diffusion layer has a haze of 50 to 95% and a total light transmittance of 50 to 100%. It is.

請求項４記載の発明は、前記光拡散性真偽判定層または光拡散層の厚みが２５〜２００μｍの範囲内であることを特徴とする請求項１〜３のいずれかに記載の真偽判定方法である。   The invention according to claim 4 is the true / false judgment according to any one of claims 1 to 3, wherein the thickness of the light diffusible authenticity judging layer or the light diffusing layer is in the range of 25 to 200 μm. Is the method.

請求項５記載の発明は、前記光拡散性真偽判定層または光拡散層の表面における十点平均粗さＲｚが２〜６μｍの範囲内であることを特徴とする請求項１〜４のいずれかに記載の真偽判定方法である。   The invention according to claim 5 is characterized in that a ten-point average roughness Rz on the surface of the light diffusibility authenticity determination layer or the light diffusion layer is in the range of 2 to 6 μm. This is a true / false determination method.

請求項６記載の発明は、前記光拡散性真偽判定層または光拡散層の表面における６０度鏡面光沢度が２０〜５０の範囲内であることを特徴とする請求項１〜５のいずれかに記載の真偽判定方法である。   The invention according to claim 6 is characterized in that the 60-degree specular gloss on the surface of the light diffusibility authenticity determination layer or the light diffusion layer is in the range of 20-50. The authenticity determination method described in 1.

請求項７記載の発明は、少なくとも光反射性薄膜層を有するシート状偽造防止構造体の真偽判定を行うための識別器であって、少なくとも該シート状偽造防止構造体の真贋を判定するための真偽判定層をするための光拡散性真偽判定層または、該シート状偽造防止構造体の真贋を判定するための真偽判定層と光拡散性層、を有し、光拡散性真偽判定層または光拡散層のヘイズが５０〜９５％、全光線透過率が５０〜１００％であることを特徴とする識別器である。   The invention according to claim 7 is a discriminator for performing the authenticity determination of the sheet-form anti-counterfeit structure having at least the light-reflective thin film layer, and at least for determining the authenticity of the sheet-form anti-counterfeit structure A light diffusible authenticity judgment layer for forming a true / false judgment layer, or a true / false judgment layer and a light diffusive layer for judging the authenticity of the sheet-like forgery prevention structure. The discriminator is characterized in that the false judgment layer or the light diffusion layer has a haze of 50 to 95% and a total light transmittance of 50 to 100%.

請求項８記載の発明は、光拡散性真偽判定層または光拡散層の厚みが２５〜２００μｍの範囲内であることを特徴とする請求項７に記載の識別器である。   The invention according to claim 8 is the discriminator according to claim 7, wherein the thickness of the light diffusibility authenticity determination layer or the light diffusion layer is in the range of 25 to 200 μm.

請求項９記載の発明は、前記光拡散性真偽判定層または光拡散層の表面における十点平均粗さＲｚが２〜６μｍの範囲内であることを特徴とする請求項７または８に記載の識別器である。   The invention described in claim 9 is characterized in that the ten-point average roughness Rz on the surface of the light diffusibility authenticity determination layer or the light diffusion layer is in the range of 2 to 6 μm. This is a discriminator.

請求項１０記載の発明は、前記光拡散性真偽判定層または光拡散層の表面における６０度鏡面光沢度が２０〜５０の範囲内であることを特徴とする請求項７〜９のいずれかに記載の識別器である。   The invention according to claim 10 is characterized in that the 60-degree specular gloss on the surface of the light diffusibility authenticity determination layer or the light diffusion layer is in the range of 20-50. It is a discriminator as described in.

請求項１１記載の発明は、光拡散性偏光層または光拡散層と偏光層を有する偏光板であって、光拡散性偏光層または光拡散層のヘイズが５０〜９５％、全光線透過率が５０〜１００％であることを特徴とする偏光板である。   The invention according to claim 11 is a polarizing plate having a light diffusing polarizing layer or a light diffusing layer and a polarizing layer, wherein the light diffusing polarizing layer or the light diffusing layer has a haze of 50 to 95% and a total light transmittance. It is a polarizing plate characterized by being 50 to 100%.

請求項１２記載の発明は、前記光拡散性偏光層または光拡散層の厚みが２５〜２００μｍの範囲内であることを特徴とする請求項１１に記載の偏光板である。   The invention according to claim 12 is the polarizing plate according to claim 11, wherein the light diffusing polarizing layer or the light diffusing layer has a thickness in the range of 25 to 200 μm.

請求項１３記載の発明は、前記光拡散性偏光層または光拡散層の表面における十点平均粗さＲｚが２〜６μｍの範囲内であることを特徴とする請求項１１または１２に記載の偏光板である。   The invention according to claim 13 is the polarization according to claim 11 or 12, wherein the ten-point average roughness Rz on the surface of the light diffusing polarizing layer or the light diffusing layer is in the range of 2 to 6 μm. It is a board.

請求項１４記載の発明は、前記光拡散性偏光層または光拡散層の表面における６０度鏡面光沢度が２０〜５０の範囲内であることを特徴とする請求項１１〜１３のいずれかに記載の偏光板である。   The invention according to claim 14 is characterized in that the 60-degree specular gloss on the surface of the light diffusing polarizing layer or the light diffusing layer is in the range of 20-50. It is this polarizing plate.

本発明によれば、金属薄膜などの反射性薄膜層を有する偽造防止体の真偽判定において、目視や通常の真偽判定用ツールとは異なり、金属光沢の影響がなく真偽の判断ができる。   According to the present invention, in authenticity determination of an anti-counterfeit body having a reflective thin film layer such as a metal thin film, unlike a visual or normal authenticity determination tool, it is possible to determine authenticity without being affected by metallic luster. .

本発明の真偽判定の対象となる偽造防止体として、例えば、光反射性薄膜層と偽造防止層を有する偽造防止体が挙げられる。
図１に一例を示す。図１において、基材１上に光反射性薄膜２を設け、その上に高分子液晶を配向させた配向部３と非配向部４をパターン状に有する潜像形成層からなる偽造防止層５を含む偽造防止体が挙げられる。
この偽造防止体は、目視では配向部と非配向部のパターンは認識できないが、偏光板などの真偽判定ツールを通して目視すると、配向部と非配向部のパターンを識別できるものである。Examples of the anti-counterfeit body that is an object of the authenticity determination of the present invention include an anti-counterfeit body having a light reflective thin film layer and an anti-counterfeit layer.
An example is shown in FIG. In FIG. 1, a light-reflective thin film 2 is provided on a substrate 1, and an anti-counterfeit layer 5 comprising a latent image forming layer having an alignment portion 3 and a non-alignment portion 4 in which polymer liquid crystal is aligned on the substrate 1 in a pattern. And anti-counterfeit bodies containing.
This anti-counterfeit body cannot visually recognize the pattern of the oriented portion and the non-oriented portion, but can visually identify the pattern of the oriented portion and the non-oriented portion when viewed through a genuineness determination tool such as a polarizing plate.

また、本発明の真偽判定の対象となる偽造防止体として、光反射性薄膜と回折構造層を有する偽造防止体が挙げられる。また、光反射性薄膜と回折構造層の組合せを用いる代わりに、いわゆるリップマンホログラムの層を設けるようにしてもよい。   Moreover, the forgery prevention body which has a light-reflective thin film and a diffraction structure layer is mentioned as a forgery prevention body used as the object of the authenticity determination of this invention. Instead of using a combination of a light reflective thin film and a diffractive structure layer, a so-called Lippmann hologram layer may be provided.

図２に一例を示す。図２において、基材１と転写用接着層７との間にパターン状の脆質層６が施されており、その上に光反射性薄膜層２、回折構造層８、剥離保護層１０、支持体９を有する。図６は図２の偽造防止体を粘着テープに密着剥離させた後の断面図である。図２において、支持体９側の表面を粘着テープにより密着剥離すると、脆質層６が破壊され、粘着テープの粘着面に回折構造層８とともに貼着され、図６に示すように、基材１上に残った回折構造層８に、光反射性薄膜層２の光反射率と異なった光反射率を有した文字や画像のパターン状の抜き部１１が出現するようになる。このパターン状の抜き部１１の出現が有るか否かで真贋の判定が可能となる。パターン状の脆質層６は、表面からは視認されず、簡便でかつ確度の高い真贋判定に用いられ、回折構造層８自体の偽造防止策にもなるものである。   An example is shown in FIG. In FIG. 2, a pattern-like brittle layer 6 is applied between the substrate 1 and the transfer adhesive layer 7, and a light-reflective thin film layer 2, a diffractive structure layer 8, a peeling protective layer 10, A support 9 is provided. FIG. 6 is a cross-sectional view after the anti-counterfeiting body of FIG. 2 is adhered and peeled from the adhesive tape. In FIG. 2, when the surface on the support 9 side is adhered and peeled off with an adhesive tape, the brittle layer 6 is destroyed and adhered to the adhesive surface of the adhesive tape together with the diffractive structure layer 8, and as shown in FIG. On the diffractive structure layer 8 remaining on the surface, a pattern-like cutout 11 of characters or images having a light reflectance different from that of the light-reflecting thin film layer 2 appears. The authenticity can be determined based on whether or not the pattern-like cutout 11 appears. The pattern-like brittle layer 6 is not visually recognized from the surface, is used for simple and highly accurate authentication determination, and serves as a measure for preventing forgery of the diffraction structure layer 8 itself.

図２の偽造防止体において、基材１としては、物品などに貼着可能な厚みの紙あるいはプラスチックフィルム、金属箔、等が用いられ、例えば、坪量２５ｇ／ｍ２〜２００ｇ／ｍ２程度の上質紙、アート紙、コート紙など、あるいは厚み１０μｍ〜３００μｍ程度のポリエチレンテレフタレートフィルム、延伸ポリプロピレンフィルム、ポリスチレンフィルム、延伸ナイロンフィルム等、あるいは厚み１０μｍ〜３００μｍ程度のアルミニウム等を圧延した金属箔、あるいはこれらの複合体などが挙げられ、その貼着対象物や用途（印刷の有無）などによって適宜選定することができる。但し、本発明は、必ずしも基材（１０）の坪量、厚み、あるいは材料を限定するものではない。In anti-counterfeiting of Figure 2, the base material 1, a paper or plastic film adhered possible thickness such articles, metal foil, etc. may be used, for example, basis weight 25g / m 2 ~200g / m 2 about High-quality paper, art paper, coated paper, or the like, or a polyethylene terephthalate film having a thickness of about 10 μm to 300 μm, a stretched polypropylene film, a polystyrene film, a stretched nylon film, or the like, or a metal foil obtained by rolling aluminum having a thickness of about 10 μm to 300 μm, or the like These composites etc. are mentioned, It can select suitably by the sticking target object, a use (the presence or absence of printing), etc. However, the present invention does not necessarily limit the basis weight, thickness, or material of the substrate (10).

また、基材の裏面にはシール用接着剤層を設けても良い。シール用接着剤層は粘着剤でなる感圧接着剤によるものと一旦加熱して粘着性を付与し貼着する感熱接着剤によるものが好適に使用される。   Moreover, you may provide the adhesive layer for a seal | sticker in the back surface of a base material. As the sealing adhesive layer, a pressure-sensitive adhesive made of a pressure-sensitive adhesive and a heat-sensitive adhesive that is once heated to give tackiness and are stuck are preferably used.

脆質層６の材料としては、基材１や接着層７との接着性の悪いアクリル樹脂、塩化ゴム系樹脂、塩化ビニル−酢酸ビニル共重合体、セルロース系樹脂、塩素化プロピレン樹脂あるいはシリコーン樹脂などの樹脂や、これらにシリコンオイル、脂肪酸アミド、ステアリン酸亜鉛を混入した樹脂、あるいは酸化チタン、酸化珪素、タルク等無機フィラーを多量混入した脆弱な樹脂が挙げられる。なお無機フィラー等を多量混入したものは、透明性が若干劣るため、反射性薄膜層２は、透過性薄膜でないことが好ましい。   Examples of the material for the brittle layer 6 include acrylic resins, chlorinated rubber resins, vinyl chloride-vinyl acetate copolymers, cellulose resins, chlorinated propylene resins, and silicone resins that have poor adhesion to the substrate 1 and the adhesive layer 7. Examples of such a resin include a resin in which silicon oil, fatty acid amide, and zinc stearate are mixed, or a fragile resin in which a large amount of an inorganic filler such as titanium oxide, silicon oxide, and talc is mixed. In addition, since what mixed a large amount of inorganic fillers etc. is slightly inferior in transparency, it is preferable that the reflective thin film layer 2 is not a transparent thin film.

上記脆質層６の材料をインキ化し、例えば、グラビア印刷法、スクリーン印刷法あるいはアニロックスローラを介してインキを版に転移するフレキソ印刷法等でパターン状の脆質層６とする。   The material of the brittle layer 6 is converted into an ink, and the patterned brittle layer 6 is formed by, for example, a gravure printing method, a screen printing method, or a flexographic printing method in which ink is transferred to a plate via an anilox roller.

また、この脆質層６を覆うように設ける保護層を設けても良い。保護層の材料としては、例えば、水性インキ、油性インキ、ニス、ＯＰニスなどの膜状に加工可能なものを適宜使用してもよいが、本発明では必ずしもこれらに限定するものではない。   Further, a protective layer may be provided so as to cover the brittle layer 6. As a material for the protective layer, for example, water-based inks, oil-based inks, varnishes, OP varnishes and the like that can be processed into a film may be used as appropriate. However, the present invention is not necessarily limited thereto.

また、この脆質層６を覆うように転写される転写用接着層７の材料としては、反射性薄膜層２や脆質層６を変質させたり、冒したりするものでなければ特に限定されるものではない。例えば、ブチルゴム系、天然ゴム系、シリコーン系、ポリイソブチル系等の接着成分と、アルキルメタクリレート、ビニルエステル、アクリルニトリル、スチレン、ビニルモノマー等の凝集成分と、不飽和カルボン酸、ヒドロキシル基含有モノマー、アクリルニトリル等に代表される改質成分や重合開始剤、可塑剤、硬化剤、硬化促進剤、酸化防止剤等の添加剤を必要に応じて添加した接着剤が挙げられる。これらは、グラビアコート法、ロールコート法、リップコート法あるいはコンマコート法等で塗布することで接着層７を形成できる。   The material of the transfer adhesive layer 7 transferred so as to cover the brittle layer 6 is not particularly limited as long as it does not alter or affect the reflective thin film layer 2 or the brittle layer 6. It is not a thing. For example, butyl rubber-based, natural rubber-based, silicone-based, polyisobutyl-based adhesive components, alkyl methacrylate, vinyl ester, acrylonitrile, styrene, vinyl monomer and other aggregating components, unsaturated carboxylic acid, hydroxyl group-containing monomers, Examples thereof include adhesives to which additives such as modifying components represented by acrylonitrile and the like, polymerization initiators, plasticizers, curing agents, curing accelerators, and antioxidants are added as necessary. The adhesive layer 7 can be formed by applying these by a gravure coating method, a roll coating method, a lip coating method or a comma coating method.

また、回折構造形成層８としては、表面にレリーフ型ホログラム等を構成する微細な凹凸パターンが熱成形で形成されるものであればよく、その材料としては、例えば、塩化ビニル−酢酸ビニル共重合体、ウレタン樹脂の他に、ポリカーボネート樹脂、ポリスチレン樹脂、ポリ塩化ビニル樹脂などの熱可塑性樹脂、不飽和ポリエステル樹脂、メラミン樹脂、エポキシ樹脂、ウレタン（メタ）アクリレート、ポリエステル（メタ）アクリレート、エポキシ（メタ）アクリレート、ポリオール（メタ）アクリレート、メラミン（メタ）アクリレート、トリアジン（メタ）アクリレートなどの熱硬化性樹脂あるいはこれらの混合物、さらにはラジカル重合性不飽和基を有する熱成形材料が適用される。   The diffractive structure forming layer 8 may be any material as long as a fine concavo-convex pattern constituting a relief hologram or the like is formed on the surface by thermoforming. Examples of the material include a vinyl chloride-vinyl acetate copolymer. In addition to coalescence and urethane resin, polycarbonate resin, polystyrene resin, polyvinyl chloride resin and other thermoplastic resins, unsaturated polyester resin, melamine resin, epoxy resin, urethane (meth) acrylate, polyester (meth) acrylate, epoxy (meta ) Acrylates, polyol (meth) acrylates, melamine (meth) acrylates, triazine (meth) acrylates and other thermosetting resins or mixtures thereof, and thermoforming materials having radically polymerizable unsaturated groups.

上記微細凹凸パターンとしては、レリーフ型ホログラムあるいは微小なエリアに複数種の単純な回折格子を配置したグレーティングイメージ、ピクセルグラムといった画像でなり、これらのプレス版により上記回折構造形成層８の材料にプレス成形で大量複製される。   The fine concavo-convex pattern is a relief hologram or an image such as a grating image or pixelgram in which a plurality of types of simple diffraction gratings are arranged in a minute area, and these press plates press the material of the diffraction structure forming layer 8. Mass reproduction by molding.

また、上記回折構造形成層８の微細な凹凸パターン面に設ける反射性薄膜層２としては、主に、厚さ１００ｎｍ程度のアルミニウムが真空蒸着法により形成されるものであり、この他に銀、金、スズ、窒化チタンなども使用することが可能である。   Moreover, as the reflective thin film layer 2 provided on the fine concavo-convex pattern surface of the diffraction structure forming layer 8, aluminum having a thickness of about 100 nm is mainly formed by a vacuum deposition method. Gold, tin, titanium nitride, etc. can also be used.

次に本発明に使用する真偽判定用の識別器について説明する。
本発明では、識別器が光拡散性を有するため、前述のような、光反射性の層を有する偽造防止体の真偽判定時に、光反射性の層による光の反射の影響を少なくでき、結果として潜像や、偽造防止判定パターンが認識できるものである。Next, a classifier for authenticity determination used in the present invention will be described.
In the present invention, since the discriminator has light diffusibility, the influence of light reflection by the light reflective layer can be reduced at the time of authenticity determination of the forgery prevention body having the light reflective layer as described above, As a result, the latent image and the forgery prevention determination pattern can be recognized.

図１のような光反射層と偽造防止層を有する偽造防止体の判定に用いる場合、識別器としては、少なくとも真偽判定層と光拡散層を有するもの、または光拡散性能と真偽判定機能を併せ持つ光拡散性真偽判定層を有するものを用いることができる。
偽造防止層が液晶材料を配向させた偏光材料を含む層である場合、真偽判定層としては偏光材料を含む層を用いればよい。すなわち光拡散性偏光層を有する偏光板または光拡散層と偏光層を有する偏光板を識別器として用いることができる。
また、図２のような偽造防止体の判定に用いる場合、識別器としては、少なくとも光拡散層を有するものを用いることができる。When used for determination of an anti-counterfeit body having a light reflection layer and an anti-counterfeit layer as shown in FIG. 1, the discriminator has at least an authenticity determination layer and an optical diffusion layer, or an optical diffusion performance and an authenticity determination function. Those having a light diffusibility authenticity judgment layer having both of the above can be used.
When the anti-counterfeit layer is a layer including a polarizing material in which a liquid crystal material is aligned, a layer including a polarizing material may be used as the authenticity determination layer. That is, a polarizing plate having a light diffusing polarizing layer or a polarizing plate having a light diffusing layer and a polarizing layer can be used as a discriminator.
Moreover, when using it for determination of a forgery prevention body like FIG. 2, what has a light-diffusion layer can be used as a discriminator.

光拡散層としては、グラシン紙、パラフィン紙、硫酸紙、トレーシングペーパーなどの半透明の紙、シリカなどの紛状物を塗工したフィルムや練り込んだフィルム、薄い不織布、薄い織布、羊皮紙（パーチメント）、すりガラス、サンドブラスト法などにより形成したマット状のフィルム、網状シート、表面に光学レンズ特性を有する媒体、等々が使用できる。これらの光拡散性層は公知の方法により設けることができる。また、各種フィルムなどの表面に塗工などによって形成される光拡散性を有する塗工したものを用いても良い。
また、各種フィルムの表面にエンボス加工したものを用いても良い。
光拡散性のフィルムとしては例えば、シリカを練り込んだ光拡散性ポリエステルフィルムが挙げられる。As the light diffusion layer, glassine paper, paraffin paper, sulfuric acid paper, translucent paper such as tracing paper, film coated with a powder such as silica, or kneaded film, thin nonwoven fabric, thin woven fabric, parchment (Parchment), ground glass, a mat-like film formed by a sandblast method, a net-like sheet, a medium having optical lens characteristics on the surface, and the like can be used. These light diffusing layers can be provided by a known method. Moreover, you may use what applied the light diffusibility formed by coating etc. on the surface of various films.
Moreover, you may use what embossed the surface of various films.
Examples of the light diffusing film include a light diffusing polyester film in which silica is kneaded.

識別器に用いる光拡散性真偽判定層（光拡散性偏光層）または光拡散層のヘイズが５０〜９５％、可視光域における全光線透過率が５０〜１００％であることが好ましい。この範囲であれば、潜像や偽造防止判定パターンを認識できるとともに、反射性薄膜層による光の反射を抑えることができ、容易に真贋の判定ができる。ヘイズが高すぎると潜像や偽造防止判定パターンの認識が困難になり、ヘイズが低すぎると光反射層の光の反射を抑える効果が弱いものとなる。また、全光線透過率が５０％以下であると、潜像や偽造防止判定パターンの認識が困難になる。
なお、全光線透過率及びヘイズは、ＪＩＳ Ｋ ７１０５に準拠して測定した値である。It is preferable that the light diffusibility authenticity determination layer (light diffusable polarizing layer) or the light diffusing layer used in the discriminator has a haze of 50 to 95% and a total light transmittance in the visible light region of 50 to 100%. Within this range, the latent image and anti-counterfeit prevention determination pattern can be recognized, and reflection of light by the reflective thin film layer can be suppressed, so that authenticity can be easily determined. If the haze is too high, it is difficult to recognize the latent image or the anti-counterfeit determination pattern, and if the haze is too low, the effect of suppressing the reflection of light from the light reflecting layer is weak. Further, when the total light transmittance is 50% or less, it is difficult to recognize a latent image or a forgery prevention determination pattern.
The total light transmittance and haze are values measured in accordance with JIS K 7105.

光拡散性真偽判定層（光拡散性偏光層）または光拡散層の厚みが２５〜２００μｍの範囲内であることが好ましい。２５μｍ未満であると、前述のヘイズを達成することが困難である。また、２００μｍより大きいと入射した光の反射が弱くなり、潜像や偽造防止判定パターンの認識が困難となる。
また、より好ましくは、５０〜７５μｍの範囲内である。It is preferable that the thickness of the light diffusing authenticity determination layer (light diffusing polarizing layer) or the light diffusing layer is in the range of 25 to 200 μm. If it is less than 25 μm, it is difficult to achieve the aforementioned haze. On the other hand, if it is larger than 200 μm, the reflection of the incident light becomes weak, and it becomes difficult to recognize the latent image and the forgery prevention determination pattern.
Moreover, More preferably, it exists in the range of 50-75 micrometers.

光拡散性真偽判定層（光拡散性偏光層）または光拡散層の表面における十点平均粗さＲｚが２〜６μｍの範囲内であることが好ましい。２μｍ未満であると表面の光拡散効果が不十分となり、光反射層の光の反射を抑える効果が弱いものとなる。６μｍより大きい場合、光の散乱にムラが出てしまうものとなる。また、より好ましくは３〜５μｍの範囲内である。
また、光拡散性真偽判定層（光拡散性偏光層）または光拡散層の表面における中心線平均粗さＲａは０．１５〜０．３５μｍの範囲内であることが好ましい。０．１５μｍ未満であると表面の光拡散効果が不十分となり、光反射層の光の反射を抑える効果が弱いものとなる。６μｍより大きい場合、光の散乱にムラが出てしまうものとなる。
また、光拡散性真偽判定層（光拡散性偏光層）または光拡散層の表面における凹凸間隔Ｓｍは２００〜４００μｍの範囲内であることが好ましい。
２００μｍ未満であると光が散乱が強く潜像や偽造防止判定パターンの認識が困難となる。４００μｍより大きいと光の散乱が弱く、光反射層の光の反射を抑える効果が弱いものとなる。
なお、表面粗さＲｚ、Ｒａ、凹凸間隔Ｓｍは、ＪＩＳ Ｂ ０６０１（１９９４）に準拠して測定した値である。The ten-point average roughness Rz on the surface of the light diffusibility authenticity determination layer (light diffusible polarizing layer) or the light diffusion layer is preferably in the range of 2 to 6 μm. When the thickness is less than 2 μm, the light diffusion effect on the surface becomes insufficient, and the effect of suppressing the light reflection of the light reflection layer becomes weak. If it is larger than 6 μm, the light scattering will be uneven. More preferably, it is in the range of 3 to 5 μm.
The center line average roughness Ra on the surface of the light diffusibility authenticity determination layer (light diffusible polarizing layer) or the light diffusion layer is preferably in the range of 0.15 to 0.35 μm. When the thickness is less than 0.15 μm, the light diffusion effect on the surface becomes insufficient, and the effect of suppressing the reflection of light by the light reflection layer becomes weak. If it is larger than 6 μm, the light scattering will be uneven.
Moreover, it is preferable that the uneven | corrugated space | interval Sm in the surface of a light diffusibility authenticity determination layer (light diffusable polarizing layer) or a light diffusion layer exists in the range of 200-400 micrometers.
If it is less than 200 μm, the light is strongly scattered and it becomes difficult to recognize the latent image and the forgery prevention determination pattern. If it is larger than 400 μm, light scattering is weak, and the effect of suppressing light reflection of the light reflecting layer is weak.
In addition, surface roughness Rz, Ra, and uneven | corrugated space | interval Sm are the values measured based on JISB0601 (1994).

光拡散性真偽判定層（光拡散性偏光層）または光拡散層の表面における６０度鏡面光沢度が２０〜５０の範囲内であることが好ましい。５０より大きいと光の拡散効果が弱く、光反射層の光の反射を抑える効果が弱いものとなる。また、より好ましくは３５〜４５の範囲内である。
なお、光沢度は、ＪＩＳ Ｚ ８７４１（１９９７）に準拠して測定した値である。It is preferable that the 60-degree specular gloss on the surface of the light-diffusible authenticity determination layer (light-diffusible polarizing layer) or the light-diffusing layer is in the range of 20-50. If it is larger than 50, the light diffusion effect is weak, and the effect of suppressing light reflection of the light reflection layer is weak. More preferably, it is in the range of 35 to 45.
The glossiness is a value measured according to JIS Z 8741 (1997).

本発明の、識別器は、光拡散層を含むシートを適当な大きさに切ってそのまま使用しても良いが、図４に示すように、適当な大きさの紙等の保持体に窓を空け、そこに光拡散層を貼付した構造の識別器としてもよい。   In the discriminator of the present invention, a sheet including a light diffusion layer may be cut into an appropriate size and used as it is. However, as shown in FIG. 4, a window is formed on a holding body such as an appropriate size paper. It is good also as a discriminator of the structure which opened and stuck the light-diffusion layer there.

図５は、本発明の偏光板の一例であり、上図はその正面図を下図はその断面図を示している。この例では、光拡散層は偏光フィルム等の偏光層に貼合され、適当な大きさに切って使用してできる。また、図５の下図に示すように、適当な大きさの紙に等の保持体に窓を空けたものを２枚用意し、中間に光拡散層と偏光層を含む積層体を挟んで紙を貼合した構造の偏光板としてもよい。
この偏光板は識別器として用いることができる。FIG. 5 shows an example of the polarizing plate of the present invention, with the upper figure showing its front view and the lower figure showing its cross-sectional view. In this example, the light diffusion layer is bonded to a polarizing layer such as a polarizing film, and can be used after being cut into an appropriate size. Also, as shown in the lower part of FIG. 5, two sheets of paper having an appropriate size and a holding body such as a window are prepared, and a sheet including a light diffusion layer and a polarizing layer is sandwiched between them. It is good also as a polarizing plate of the structure which bonded.
This polarizing plate can be used as a discriminator.

また、図２、図３に示した偽造防止体に粘着テープを貼り合わせる際、光拡散性の粘着テープを用いても良い。例えば光拡散性のポリエステルフィルムに透明な粘着剤を塗工した識別器としてもよい。なお、長尺状のフィルムを用いて巻いたものとしてもよい。
この光拡散性粘着テープを脆質層の幅の2倍程度の長さに切り取り、その半分を剥離に用い、残りの半分を真偽判定用に用いることができる。Moreover, you may use a light-diffusion adhesive tape when bonding an adhesive tape to the forgery prevention body shown in FIG. 2, FIG. For example, a discriminator in which a transparent adhesive is applied to a light diffusing polyester film may be used. In addition, it is good also as what wound using the elongate film.
This light-diffusing adhesive tape can be cut into a length about twice the width of the brittle layer, half of which can be used for peeling, and the other half can be used for authenticity determination.

＜実施例１＞
以下に図２の態様の実施例を示す。
市販の粘着加工済みタック紙（７３ｇ／ｍ２）に銀ペーストインキを酸化重合乾燥樹脂凸版印刷法で厚み約２μｍの脆質層をパターン状に形成した。次いでホログラム転写箔（商品名：「Ｒ１２１Ｆ１６ホログラム転写箔」、凸版印刷（株）製）をホットスタンプ（１３０℃、０．３秒）により厚み約１．５μｍの光沢セキュリティ層を加え偽造防止体を得た。<Example 1>
Examples of the embodiment shown in FIG. 2 are shown below.
A brittle layer having a thickness of about 2 μm was formed in a pattern on a commercially available tack-processed tack paper (73 g / m 2 ) using a silver paste ink by an oxidation polymerization dry resin letterpress printing method. Next, a hologram transfer foil (trade name: “R121F16 hologram transfer foil”, manufactured by Toppan Printing Co., Ltd.) is added with a gloss security layer having a thickness of about 1.5 μm by hot stamping (130 ° C., 0.3 seconds) to form a forgery prevention body. Obtained.

上記方法で作成した偽造防止体の真贋判定を粘着テープにより行った。
まず、光沢セキュリティ部に部分的に露出した脆質パターン部分を目視観察したところ、ホログラムの輝きや金属蒸着層の正反射照明光の影響で、明確に脆質パターンを確認出来なかった。
次に紙材に窓を空け、そこに光拡散性層を貼付した構造の識別器を用いて真偽判定を行った。
光拡散層としては、表１に示すものを用いた。The authenticity of the anti-counterfeit body prepared by the above method was determined with an adhesive tape.
First, when the brittle pattern part partially exposed to the glossy security part was visually observed, the brittle pattern could not be clearly confirmed due to the brightness of the hologram and the influence of the regular reflection illumination light of the metal deposition layer.
Next, an authenticity judgment was performed using a discriminator having a structure in which a window was opened in a paper material and a light diffusing layer was attached thereto.
As the light diffusion layer, those shown in Table 1 were used.

評価は以下のようにして行った。
光反射性薄膜層の光反射率と異なった光反射率を有した文字や画像を露出させ、この上に光を透過するシート状物や光を拡散するシート状物を置いて、文字や画像がどのように見えるのか、目視角度を変化させて観察した。
ブランク（シート状物を置かない場合）と比較して、非常に効果が大きいものを◎、ブランクより効果があるものを○、ブランクと同等のものをＢ、効果が見られないかブランクより劣るものを×の４段階評価で行った。また同時にシート状物のヘイズと全光線透過率の測定も行った。その結果を表１に示す。図７は、表１を図に表したものである。Evaluation was performed as follows.
A character or image having a light reflectivity different from that of the light reflective thin film layer is exposed, and a sheet or light diffusing sheet is placed on the character or image. Was observed by changing the viewing angle.
Compared with a blank (when no sheet-like material is placed), ◎ is very effective, ○ is more effective than the blank, B is equivalent to the blank, B is not effective or inferior to the blank The thing was evaluated by four-step evaluation of x. At the same time, the haze and total light transmittance of the sheet were measured. The results are shown in Table 1. FIG. 7 shows Table 1 as a diagram.

Figure 2008133113
Figure 2008133113

表１及び図７で明らかのように、識別器のヘイズは５０〜９５％、全光線透過率は５０〜１００％である光拡散層を用いた器具でパターン部を観察したところ、ホログラムの輝きや金属蒸着層正反射照明光特有のギラギラ感が緩和されて、パターン部分が光拡散性状物質を使用した器具を使用前の時と比較してはるかに明確に観察できた。   As apparent from Table 1 and FIG. 7, when the pattern portion was observed with an instrument using a light diffusion layer having a haze of 50 to 95% and a total light transmittance of 50 to 100%, the brightness of the hologram In addition, the glaring sensation peculiar to the specular reflection illumination light of the metal vapor deposition layer was alleviated, and the device using the light diffusing material in the pattern portion could be observed much more clearly than before.

＜実施例２＞
厚み５０μｍポリエステルフィルムの一方の表面に、鏡面反射層として真空蒸着法により厚み６０ｎｍのアルミ蒸着層を形成した。次にこの表面に、高分子液晶２０質量部、ＭＥＫ８０質量部よりなる潜像形勢用塗料を用いてグラビア印刷により潜像形成層を形成した。なお、その乾燥温度は６０℃であり、塗布厚みは０．５μｍであった。その後潜像形成層上に、オフセット印刷法により、アクリル樹脂系アンカーメジウムを約１μｍの厚みに印刷塗工し、さらにその上に、オフセット印刷法によりアクリル樹脂系トップコートニスを約２μｍの厚みに印刷塗工することにより保護層を形成した。次いで保護層側からホットスタンプ（１２０℃、０．２秒）により潜像形成層に所定のパターンで熱圧を加え、配向部を形成した。<Example 2>
An aluminum vapor deposition layer having a thickness of 60 nm was formed as a specular reflection layer on one surface of a 50 μm thick polyester film by a vacuum vapor deposition method. Next, a latent image forming layer was formed on the surface by gravure printing using a latent image forming paint comprising 20 parts by mass of polymer liquid crystal and 80 parts by mass of MEK. The drying temperature was 60 ° C., and the coating thickness was 0.5 μm. Thereafter, an acrylic resin-based anchor medium is printed on the latent image forming layer by an offset printing method to a thickness of about 1 μm, and further, an acrylic resin-based topcoat varnish is formed to a thickness of about 2 μm by the offset printing method. A protective layer was formed by printing. Next, hot pressure (120 ° C., 0.2 seconds) was applied to the latent image forming layer in a predetermined pattern from the protective layer side to form an alignment portion.

上記方法で潜像を形成した情報記録媒体を目視観察したところ、潜像を識別することはできず、単に金属蒸着した媒体にしか見えなかった。光拡散性のない偏光フィルムを介して情報記録媒体を目視観察したところ、やや反射層の光の反射が邪魔になるものの、潜像を可視像として観察できた。
次に光拡散性層として表１におけるトレーシングフィルムＡを用い、偏光フィルムと光拡散性層を貼合した検証器で情報記録媒体を目視観察したところ、金属蒸着層特有のギラギラ感が緩和されて、潜像を可視像として偏光フィルム単独の時と比較してはるかに明瞭に観察できた。なお用いた光拡散性層のヘイズは９２．５%で全光線透過率は７１．３%であった。When the information recording medium on which the latent image was formed by the above-mentioned method was visually observed, the latent image could not be identified, and could only be seen as a metal-deposited medium. When the information recording medium was visually observed through a polarizing film having no light diffusibility, the latent image could be observed as a visible image although the reflection of light from the reflective layer was somewhat disturbed.
Next, when the tracing film A in Table 1 was used as the light diffusive layer and the information recording medium was visually observed with a verifier in which the polarizing film and the light diffusible layer were bonded, the glare sensation peculiar to the metal deposition layer was alleviated. As a result, the latent image was observed as a visible image much more clearly than when the polarizing film alone was used. The light diffusing layer used had a haze of 92.5% and a total light transmittance of 71.3%.

真偽判定の対象となる偽造防止体の一例を示す断面図である。It is sectional drawing which shows an example of the forgery prevention body used as the object of authenticity determination. 真偽判定の対象となる偽造防止体の一例を示す断面図である。It is sectional drawing which shows an example of the forgery prevention body used as the object of authenticity determination. 真偽判定の対象となる偽造防止体の一例を示す断面図である。It is sectional drawing which shows an example of the forgery prevention body used as the object of authenticity determination. 本発明の識別器又は偏光板の一例を示す概略図である。It is the schematic which shows an example of the discriminator or polarizing plate of this invention. 本発明の識別器又は偏光板の一例を示す概略図である。It is the schematic which shows an example of the discriminator or polarizing plate of this invention. 表１を図式化したグラフ図である。FIG. 3 is a graph diagrammatically showing Table 1.

符号の説明Explanation of symbols

１・・・・基材
２・・・・光反射性薄膜層
３・・・・配向部
４・・・・非配向部
５・・・・偽造防止層
６・・・・脆質層
７・・・・転写用接着層
８・・・・回折構造層
９・・・・支持体
１０・・・剥離保護層
１１・・・パターン状抜き部
１２・・・光拡散層
１３・・・保持体
１４・・・偏光層DESCRIPTION OF SYMBOLS 1 ... Base material 2 ... Light reflective thin film layer 3 ... Orientation part 4 ... Non-orientation part 5 ... Anti-counterfeiting layer 6 ... Brittle layer 7 ... ... Transfer adhesive layer 8 ... Diffraction structure layer 9 ... Support 10 ... Peeling protection layer 11 ... Pattern-shaped extraction part 12 ... Light diffusion layer 13 ... Holding body 14 ... Polarizing layer

Claims (14)

少なくとも光反射性薄膜層と、偽造防止機能層とを有するシート状偽造防止構造体の真偽判定を識別器を用いて行う真偽判定方法であって、
該シート状偽造防止構造体の真贋を判定するための光拡散性真偽判定層または、
該シート状偽造防止構造体の真贋を判定するための真偽判定層と光拡散性層、を有する識別器を用いて真偽判定を行う真偽判定方法であり、
該光拡散性真偽判定層または光拡散層のヘイズが５０〜９５％、全光線透過率が５０〜１００％であることを特徴とする真偽判定方法。A true / false determination method that uses a discriminator to determine the authenticity of a sheet-form anti-counterfeit structure having at least a light-reflective thin film layer and an anti-counterfeit functional layer,
A light diffusing authenticity determination layer for determining the authenticity of the sheet-like forgery prevention structure, or
A true / false determination method for performing authenticity determination using a discriminator having a true / false determination layer and a light diffusing layer for determining the authenticity of the sheet-like forgery prevention structure,
A true / false determining method, wherein the light diffusibility authenticity determining layer or the light diffusing layer has a haze of 50 to 95% and a total light transmittance of 50 to 100%. 前記シート状偽造防止構造体の偽造防止機能層が偏光材料を含む層であり、かつ該識別器の光拡散性真偽判定層または真偽判定層が偏光材料を含む層であることを特徴とする請求項１記載の真偽判定方法。   The anti-counterfeiting functional layer of the sheet-like anti-counterfeit structure is a layer containing a polarizing material, and the light diffusing authenticity determination layer or the authenticity determining layer of the discriminator is a layer containing a polarizing material, The authenticity determination method according to claim 1. 基材上に少なくとも光反射性薄膜層、該基材と光反射性薄膜層の間に脆質パターン層を有するシート状偽造防止構造体の真偽判定を識別器を用いて行う真偽判定方法であって、
該シート状偽造防止構造体と粘着シートを貼り合わせ、
該粘着テープを剥離することにより脆質パターン状に光拡散層を除去し、
光拡散層を有する識別器を用いて真偽判定を行う真偽判定方法であり、
該光拡散層のヘイズが５０〜９５％、全光線透過率が５０〜１００％であることを特徴とする真偽判定方法。Authenticity determination method for determining authenticity of a sheet-form anti-counterfeit structure having at least a light-reflective thin film layer on a substrate and a brittle pattern layer between the substrate and the light-reflective thin film layer using a discriminator Because
Bonding the sheet-like forgery prevention structure and the adhesive sheet,
By removing the adhesive tape, the light diffusion layer is removed in a brittle pattern,
It is a true / false determination method for performing authenticity determination using a discriminator having a light diffusion layer,
A method for determining authenticity, wherein the light diffusion layer has a haze of 50 to 95% and a total light transmittance of 50 to 100%. 前記光拡散性真偽判定層または光拡散層の厚みが２５〜２００μｍの範囲内であることを特徴とする請求項１〜３のいずれかに記載の真偽判定方法。   The authenticity determination method according to any one of claims 1 to 3, wherein a thickness of the light diffusable authenticity determination layer or the light diffusion layer is in a range of 25 to 200 µm. 前記光拡散性真偽判定層または光拡散層の表面における十点平均粗さＲｚが２〜６μｍの範囲内であることを特徴とする請求項１〜４のいずれかに記載の真偽判定方法。   The authenticity determination method according to any one of claims 1 to 4, wherein a ten-point average roughness Rz on the surface of the light diffusibility authenticity determination layer or the light diffusion layer is in a range of 2 to 6 µm. . 前記光拡散性真偽判定層または光拡散層の表面における６０度鏡面光沢度が２０〜５０の範囲内であることを特徴とする請求項１〜５のいずれかに記載の真偽判定方法。   The authenticity determination method according to any one of claims 1 to 5, wherein a 60 degree specular gloss on the surface of the light diffusibility authenticity determination layer or the light diffusion layer is in a range of 20-50. 少なくとも光反射性薄膜層を有するシート状偽造防止構造体の真偽判定を行うための識別器であって、
少なくとも該シート状偽造防止構造体の真贋を判定するための真偽判定層をするための光拡散性真偽判定層または、該シート状偽造防止構造体の真贋を判定するための真偽判定層と光拡散性層、を有し、
光拡散性真偽判定層または光拡散層のヘイズが５０〜９５％、全光線透過率が５０〜１００％であることを特徴とする識別器。An identifier for performing authenticity determination of a sheet-like forgery prevention structure having at least a light-reflective thin film layer,
At least a light diffusible authenticity determination layer for determining the authenticity of the sheet-like anti-counterfeit structure, or an authenticity determination layer for determining authenticity of the anti-sheet anti-counterfeit structure And a light diffusing layer,
A discriminator characterized in that the light diffusibility authenticity determination layer or the light diffusion layer has a haze of 50 to 95% and a total light transmittance of 50 to 100%. 光拡散性真偽判定層または光拡散層の厚みが２５〜２００μｍの範囲内であることを特徴とする請求項７に記載の識別器。   The discriminator according to claim 7, wherein the thickness of the light diffusing authenticity determination layer or the light diffusing layer is in the range of 25 to 200 µm. 前記光拡散性真偽判定層または光拡散層の表面における十点平均粗さＲｚが２〜６μｍの範囲内であることを特徴とする請求項７または８に記載の識別器。   The discriminator according to claim 7 or 8, wherein a ten-point average roughness Rz on a surface of the light diffusibility authenticity determination layer or the light diffusion layer is in a range of 2 to 6 µm. 前記光拡散性真偽判定層または光拡散層の表面における６０度鏡面光沢度が２０〜５０の範囲内であることを特徴とする請求項７〜９のいずれかに記載の識別器。   The discriminator according to any one of claims 7 to 9, wherein a 60-degree specular gloss on the surface of the light diffusibility authenticity determination layer or the light diffusion layer is in a range of 20 to 50. 光拡散性偏光層または光拡散層と偏光層を有する偏光板であって、
光拡散性偏光層または光拡散層のヘイズが５０〜９５％、全光線透過率が５０〜１００％であることを特徴とする偏光板。A polarizing plate having a light diffusing polarizing layer or a light diffusing layer and a polarizing layer,
A polarizing plate, wherein the light diffusing polarizing layer or the light diffusing layer has a haze of 50 to 95% and a total light transmittance of 50 to 100%. 前記光拡散性偏光層または光拡散層の厚みが２５〜２００μｍの範囲内であることを特徴とする請求項１１に記載の偏光板。   The polarizing plate according to claim 11, wherein the light diffusing polarizing layer or the light diffusing layer has a thickness in a range of 25 to 200 μm. 前記光拡散性偏光層または光拡散層の表面における十点平均粗さＲｚが２〜６μｍの範囲内であることを特徴とする請求項１１または１２に記載の偏光板。   The polarizing plate according to claim 11 or 12, wherein a ten-point average roughness Rz on the surface of the light diffusing polarizing layer or the light diffusing layer is in a range of 2 to 6 µm. 前記光拡散性偏光層または光拡散層の表面における６０度鏡面光沢度が２０〜５０の範囲内であることを特徴とする請求項１１〜１３のいずれかに記載の偏光板。   The polarizing plate according to claim 11, wherein the light diffusing polarizing layer or the surface of the light diffusing layer has a 60-degree specular gloss in a range of 20 to 50.
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