JP2020001181A - Printed matter - Google Patents

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JP2020001181A
JP2020001181A JP2018119908A JP2018119908A JP2020001181A JP 2020001181 A JP2020001181 A JP 2020001181A JP 2018119908 A JP2018119908 A JP 2018119908A JP 2018119908 A JP2018119908 A JP 2018119908A JP 2020001181 A JP2020001181 A JP 2020001181A
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invisible
base material
printed
printed matter
reflection layer
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JP7144212B2 (en
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健一 柿沼
Kenichi Kakinuma
健一 柿沼
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Toppan Infomedia Co Ltd
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Toppan Infomedia Co Ltd
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Abstract

To provide a printed matter that has no limitation in a pigment, a print region and the like for printing of visible information and has a great ability of preventing visual reading of invisible information.SOLUTION: A printed matter 11 has a base material 1, an invisible print part 2 that is printed on the base material 1 and becomes visible by heat or light irradiation, and an irregular reflection layer 3 that covers the base material 1 and the invisible print part 2.SELECTED DRAWING: Figure 1

Description

本発明は、印刷物に関する。   The present invention relates to printed matter.

市場から信頼された高品質の製品の模倣品が流通し、問題となっている。これらの模倣品と正規品とを識別するために、正規に製造されたことを証明する特殊なラベルを貼付する場合がある。図５に示す印刷物１００のように、通常のラベルは、基材１０１の上に、バーコードなどの可視情報が印刷されているだけだが（可視印刷部１０２）、このような特殊なラベルには、正規の製品であることを保証するために、不可視情報が可視印刷部１０２の上に印刷されている（不可視印刷部１０３）。ここで、不可視情報とは、目視では読み取れないが、紫外線の照射などの外的な処理を行うことで読み取りが可能になる情報をいう。しかし、直接不可視情報を印刷した場合、基材１０１（又は可視印刷部１０２）と不可視印刷部１０３の間の微小な段差領域では、それ以外の領域と光の反射の仕方が異なるため、光の加減などによっては、不可視情報を目視で読み取れてしまうという問題があった。   Counterfeit products of high-quality products trusted by the market have become a problem. In order to distinguish these counterfeit products from genuine products, special labels proving that they have been properly manufactured may be attached. As shown in a printed matter 100 shown in FIG. 5, a normal label has only visible information such as a barcode printed on a base material 101 (visible printing section 102). In order to guarantee that the product is a legitimate product, invisible information is printed on the visible printing unit 102 (invisible printing unit 103). Here, the invisible information refers to information that cannot be read visually, but can be read by performing external processing such as irradiation of ultraviolet rays. However, when the invisible information is directly printed, the light reflected by the small step region between the base material 101 (or the visible printing portion 102) and the invisible printing portion 103 is different from the other regions. There is a problem that the invisible information can be visually read depending on the degree of adjustment.

この問題を解決するために、従来様々な取り組みが行われてきた。特許文献１には、図６に示す印刷物２００のように、可視情報を印刷した可視印刷部１０２と不可視情報を印刷した不可視印刷部１０３（透明蛍光インキ）の上に透明なオーバープリント層１０４を設ける技術が開示されている。特許文献２には、透明蛍光インキに含まれる蛍光顔料よりも大きい粒径の顔料で絵柄を印刷し、その絵柄印刷の上に透明蛍光インキを印刷する技術が開示されている。   Various approaches have conventionally been taken to solve this problem. In Patent Document 1, as shown in a printed matter 200 shown in FIG. 6, a transparent overprint layer 104 is formed on a visible printing portion 102 on which visible information is printed and an invisible printing portion 103 (transparent fluorescent ink) on which invisible information is printed. A technique for providing is disclosed. Patent Document 2 discloses a technique in which a pattern is printed with a pigment having a particle size larger than the fluorescent pigment contained in the transparent fluorescent ink, and the transparent fluorescent ink is printed on the pattern print.

特開平７−１９５８１９号公報JP-A-7-195819 特開平７−８９２８３号公報JP-A-7-89283

しかし、特許文献１の技術では、依然として光の加減などによって不可視情報を読み取ることが可能な場合があり、不可視情報の読み取り防止技術としては不十分である。特許文献２の技術も、特許文献１の技術と同様に不可視情報の読み取り防止性能が不十分であることに加え、使用する顔料や不可視情報の印刷領域が限定されるという問題がある。
そこで、本発明では、可視情報を印刷する顔料や印刷領域等に制約が無く目視による不可視情報の読み取りを防止する性能に優れた印刷物を提供することを課題とする。 However, the technique of Patent Document 1 may still be able to read invisible information due to the degree of light, etc., and is insufficient as a technique for preventing reading of invisible information. The technique of Patent Literature 2 also has a problem that, in the same manner as the technique of Patent Literature 1, the performance of preventing invisible information from being read is insufficient, and also the pigment used and the printing area of the invisible information are limited.
In view of the above, an object of the present invention is to provide a printed matter which has no restriction on a pigment for printing visible information, a printing region, and the like, and has an excellent performance of preventing reading of invisible information visually.

前記課題を解決するために、本発明は以下の手段を提案している。
（１）第１の発明に係る印刷物は、基材と、前記基材上に印刷され、熱又は光を照射することにより視認可能となる不可視印刷部と、前記基材及び前記不可視印刷部を覆う乱反射層と、を備える。ここで、乱反射層とは、入射した光を乱反射する機能を有する層をいう。 In order to solve the above problems, the present invention proposes the following means.
(1) The printed matter according to the first invention includes a base material, an invisible printed portion that is printed on the base material and is visible by irradiating heat or light, and the base material and the invisible printed portion. And a diffusely reflecting layer for covering. Here, the irregular reflection layer refers to a layer having a function of irregularly reflecting incident light.

本発明によれば、乱反射層が基材及び不可視印刷部を覆っている。乱反射層に入射する光が乱反射するため、基材と不可視印刷部の段差領域とそれ以外の領域での光の反射状態の違いを小さくし、段差領域を目立ち難くする。そのため、目視により不可視印刷部を確認しにくくなる。
なお、乱反射層を設けることで、基材と不可視印刷部との段差領域も乱反射層に覆われる。例えば、乱反射層のうち、基材を覆う部分と不可視印刷部を覆う部分とで、厚さが異なる場合、乱反射層が前記段差領域における段差を吸収し、乱反射層において前記段差領域を覆う部分に現れる段差を小さくすることができる。この場合には、段差領域を一層確認し難くなる。 According to the present invention, the irregular reflection layer covers the substrate and the invisible printed portion. Since the light incident on the irregular reflection layer is irregularly reflected, the difference in the light reflection state between the step region of the base material and the invisible printed portion and the other region is reduced, and the step region is made inconspicuous. Therefore, it is difficult to visually confirm the invisible printed portion.
By providing the irregular reflection layer, the step region between the base material and the invisible printed portion is also covered with the irregular reflection layer. For example, in the irregular reflection layer, when the thickness is different between the portion covering the base material and the portion covering the invisible printed portion, the irregular reflection layer absorbs the step in the step region, and the irregular reflection layer covers the step region in the irregular reflection layer. Appearing steps can be reduced. In this case, it is more difficult to confirm the step region.

（２）第２の発明に係る印刷物において、（１）の発明の特徴に加え、前記基材上に印刷された可視印刷部を備える。   (2) The printed matter according to the second aspect of the present invention includes, in addition to the features of the invention of (1), a visible print portion printed on the base material.

本発明によれば、乱反射層が基材、可視印刷部及び不可視印刷部又は基材及び可視印刷部を覆っている。乱反射層に入射する光が乱反射するため、基材と不可視印刷部（または可視印刷部と不可視印刷部）の段差領域とそれ以外の領域での光の反射状態の違いを小さくし、段差領域を目立ち難くする。そのため、目視により不可視印刷部を確認しにくくなる。   According to the present invention, the irregular reflection layer covers the base material, the visible print portion and the invisible print portion or the base material and the visible print portion. Since the light incident on the irregular reflection layer is irregularly reflected, the difference in the light reflection state between the step region between the base material and the invisible printing portion (or the visible printing portion and the invisible printing portion) and the other region is reduced, and the step region is reduced. Make it less noticeable. Therefore, it is difficult to visually confirm the invisible printed portion.

（３）第３の発明に係る印刷物において、（１）又は（２）の発明の特徴に加え、前記乱反射層は、透明なベース材と、前記透明なベース材内に配置され光を反射する粒子と、を備える。   (3) In the printed matter according to the third invention, in addition to the features of the invention according to (1) or (2), the irregular reflection layer is disposed in the transparent base material and reflects light. And particles.

本発明によれば、光を透過する透明なベース材を用いているため、例えば、光は乱反射層の中を進み、多数の粒子で複数回反射される。その結果、入射してきた光が乱反射され、目視により不可視印刷部を確認しにくくなる。   According to the present invention, since a transparent base material that transmits light is used, for example, light travels through the irregular reflection layer and is reflected multiple times by a large number of particles. As a result, the incident light is irregularly reflected, making it difficult to visually confirm the invisible printed portion.

（４）第４の発明に係る印刷物において、（１）から（３）いずれか１つの発明の特徴に加え、前記乱反射層は、偏光顔料を備えることを特徴とする。   (4) In the printed matter according to the fourth aspect, in addition to the features of any one of the aspects (1) to (3), the irregular reflection layer includes a polarizing pigment.

本発明によれば、偏光顔料を備えることから、印刷物を見る角度によって、その色調が変化する。そのため、前述の段差領域を目立ち難くする。そのため、目視により不可視印刷部を確認しにくくなる。   According to the present invention, since the polarizing pigment is provided, the color tone of the printed matter changes depending on the viewing angle. Therefore, the above-mentioned step region is made inconspicuous. Therefore, it is difficult to visually confirm the invisible printed portion.

（５）第５の発明に係る印刷物は、（１）から（４）いずれか１つの発明の特徴に加え、基材及び前記不可視印刷部と、前記乱反射層と、の間に配置された透明層を更に備えることを特徴とする。   (5) The printed matter according to the fifth invention is characterized in that, in addition to the features of any one of the inventions (1) to (4), a transparent material disposed between the substrate and the invisible printed portion and the irregular reflection layer. It is characterized by further comprising a layer.

本発明によれば、透明層が基材及び不可視印刷部と、乱反射層と、の間に配置されているため、乱反射層において前記段差領域を覆う部分に現れる段差をより小さくし、段差領域を目立ち難くする。そのため、目視により不可視印刷部を確認しにくくなる。   According to the present invention, since the transparent layer is disposed between the base material and the invisible printed portion, and the irregular reflection layer, a step appearing in a portion covering the step region in the irregular reflection layer is made smaller, and the step region is formed. Make it less noticeable. Therefore, it is difficult to visually confirm the invisible printed portion.

本発明は、可視情報を印刷する顔料や印刷領域等に制約が無く目視による不可視情報の読み取りを防止する性能に優れた印刷物を提供することができる。   ADVANTAGE OF THE INVENTION This invention can provide the printed material excellent in the performance which prevents reading of the invisible information by visual observation without restriction in the pigment which prints visible information, a printing area, etc.

本発明の一実施形態に係る印刷物の模式断面図である。It is a schematic cross section of a printed matter concerning one embodiment of the present invention. 基材の上に可視印刷部を備える本発明の別の実施形態に係る印刷物の模式断面図である。FIG. 4 is a schematic cross-sectional view of a printed matter according to another embodiment of the present invention having a visible printed portion on a base material. 基材及び可視印刷部及び不可視印刷部と乱反射層との間に配置された透明層を備える本発明の別の実施形態に係る印刷物の模式断面図である。FIG. 5 is a schematic cross-sectional view of a printed matter according to another embodiment of the present invention including a transparent layer disposed between a substrate, a visible print portion, an invisible print portion, and a diffuse reflection layer. 不可視印刷部の上に可視印刷部を備える本発明の別の実施形態に係る印刷物の模式断面図である。FIG. 11 is a schematic cross-sectional view of a printed matter according to another embodiment of the present invention, which includes a visible printing part on an invisible printing part. 基材及び可視印刷部の上に直接、不可視印刷部を備える印刷物の模式断面図である。It is a schematic cross section of a printed matter provided with an invisible printing part directly on a base material and a visible printing part. 基材及び可視印刷部及び不可視印刷部を覆うオーバープリント層を備える印刷物の模式断面図である。It is a schematic cross section of a printed matter provided with an overprint layer which covers a base material and a visible printing part and an invisible printing part.

以下、図１〜３を参照し、本発明の実施形態に係る印刷物について説明する。
図１は、本発明の一実施形態に係る印刷物１１の模式断面図である。図１において、印刷物１１は、基材１、不可視印刷部２、乱反射層３を備える。不可視印刷部２は基材１上に印刷され形成される。また図２又は図４は、基材１上に可視印刷部６をさらに備える。この場合、図２のように直接に可視印刷部６が基材１上に印刷されている場合もあれば、図４のように不可視印刷部２の上に可視印刷部６を印刷する場合もある。図１において、乱反射層３が粒子４を備えた例を示しているが、乱反射層３は入射した光を乱反射する機能を有していればよいため、粒子４を備えていなくてもよい（具体的な構成については後述）。図２は、可視印刷部６をさらに備える本発明の別の実施形態に係る印刷物１２の模式図である。可視印刷部６は、可視情報を基材１上に印刷して形成される。可視情報や後述する不可視情報（情報）には、文字、数字、記号、バーコード、２次元コード等の他に、絵や模様なども含まれる。不可視印刷部２、可視印刷部６は、基材１の片側のみに設けられていてもよく、両面に設けられていてもよい。
以下では、特に参照しない限り、図１に係る印刷物１１を説明する。 Hereinafter, a printed matter according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a schematic sectional view of a printed matter 11 according to one embodiment of the present invention. In FIG. 1, a printed material 11 includes a base material 1, an invisible printed portion 2, and a diffuse reflection layer 3. The invisible printing part 2 is formed by printing on the base material 1. 2 or 4 further includes a visible print portion 6 on the base material 1. In this case, the visible printing portion 6 may be printed directly on the base material 1 as shown in FIG. 2, or the visible printing portion 6 may be printed on the invisible printing portion 2 as shown in FIG. is there. FIG. 1 shows an example in which the irregular reflection layer 3 includes the particles 4. However, the irregular reflection layer 3 may have the function of irregularly reflecting incident light, and thus may not include the particles 4 ( The specific configuration will be described later). FIG. 2 is a schematic diagram of a printed matter 12 according to another embodiment of the present invention, further including a visible printing unit 6. The visible printing unit 6 is formed by printing visible information on the base material 1. The visible information and invisible information (information) described below include pictures, patterns, etc., in addition to characters, numbers, symbols, barcodes, two-dimensional codes, and the like. The invisible printing unit 2 and the visible printing unit 6 may be provided on only one side of the base material 1 or may be provided on both sides.
Hereinafter, the printed matter 11 according to FIG. 1 will be described unless otherwise specified.

＜１．基材＞
基材１は、不可視印刷部２（図２に示すように可視印刷部６を備える場合は、不可視印刷部２及び可視印刷部６）を備えることができれば、その材質は限定されない。例えば、基材１には、ポリプロピレン、ポリエチレンテレフタレート、ポリ塩化ビニル等の樹脂フィルムや上質紙、複写印刷用紙、レーヨン紙、コート紙、合成紙、ラミネート紙等の紙材を用いることができる。また、基材１は、不可視印刷部２を備える面とは反対の面に粘着層を備えていてもよい。粘着層を設ける場合は、基材１は粘着層を覆う離型紙をさらに備えていてもよい。基材１は、不可視印刷部２、可視印刷部６の剥離などを防ぐ目的で下地層を備えていてもよい。 <1. Substrate>
The material of the base material 1 is not limited as long as it can be provided with the invisible printing unit 2 (in the case of including the visible printing unit 6 as shown in FIG. 2, the invisible printing unit 2 and the visible printing unit 6). For example, as the base material 1, a resin film such as polypropylene, polyethylene terephthalate, or polyvinyl chloride, or a paper material such as high quality paper, copy printing paper, rayon paper, coated paper, synthetic paper, or laminated paper can be used. Further, the base material 1 may include an adhesive layer on a surface opposite to a surface including the invisible printed portion 2. When an adhesive layer is provided, the substrate 1 may further include a release paper covering the adhesive layer. The substrate 1 may be provided with an underlayer for the purpose of preventing the invisible printed portion 2 and the visible printed portion 6 from peeling off.

＜２．不可視印刷部＞
不可視印刷部２は、不可視情報が印刷された部分をいう。不可視印刷部２が不可視性（透明性）を有することで、目視により不可視印刷部２を確認しにくくなる。透明性が高いほど不可視印刷部２が確認しにくくなるため、不可視印刷部２は高い透明性を有することが好ましい。不可視印刷部２は、熱又は光を照射することにより視認可能となるインキで形成することができる。特に、不可視印刷部２は、紫外線や赤外線等の可視領域外の波長の光を照射することで視認可能となる蛍光インキを用いて形成することが好ましい。ここで、蛍光インキとは、紫外線や赤外線などにより蛍光を発する材料を樹脂中に分散させインキ化したものをいう。蛍光インキで形成した不可視印刷部２に紫外線又は赤外線を照射することで、蛍光インキに含有される蛍光を発する材料が励起されて所定の波長の光を発する。この光を所定の装置を利用して検出し、不可視情報を読み取ることができる。蛍光性を有する材料としては、酸化亜鉛などの無機材料の他に、アントラセン等の有機材料を用いることができる。なお、熱によって、視認可能となるインキとしては、例えばパイロットインキ製ＨＡメタモや特開2001-105732記載のインキなどを用いることができる。このようなインキで形成した不可視印刷部２は、加熱によって発色するため、不可視情報を読み取ることができる。 <2. Invisible printing section>
The invisible printing unit 2 refers to a portion where the invisible information is printed. When the invisible printing unit 2 has invisibility (transparency), it becomes difficult to visually check the invisible printing unit 2. The higher the transparency, the more difficult it is for the invisible printing unit 2 to be confirmed. Therefore, the invisible printing unit 2 preferably has high transparency. The invisible printing portion 2 can be formed of ink that can be viewed by irradiating heat or light. In particular, it is preferable that the invisible printing portion 2 is formed using a fluorescent ink that can be viewed by irradiating light having a wavelength outside the visible region, such as ultraviolet light or infrared light. Here, the term “fluorescent ink” refers to an ink obtained by dispersing a material that emits fluorescence by ultraviolet light or infrared light in a resin to form an ink. By irradiating the invisible printing portion 2 formed of the fluorescent ink with ultraviolet light or infrared light, the material emitting fluorescence contained in the fluorescent ink is excited to emit light of a predetermined wavelength. This light can be detected using a predetermined device, and invisible information can be read. As a material having fluorescence, an organic material such as anthracene can be used in addition to an inorganic material such as zinc oxide. As the ink that can be visually recognized by heat, for example, HA Metamo manufactured by Pilot Ink or the ink described in JP-A-2001-105732 can be used. The invisible printing section 2 formed of such an ink develops color by heating, so that invisible information can be read.

＜３．乱反射層＞
乱反射層３は、入射してきた光を乱反射する機能を有する。乱反射層３を基材１及び不可視印刷部２（図２では基材１及び可視印刷部６及び不可視印刷部２）の上に設けることで、印刷物１１に入射する光を乱反射して、基材１と不可視印刷部２の段差領域とそれ以外の領域での光の反射状態の違いを小さくし、段差領域を目立ち難くする。その結果、目視により不可視印刷部２を確認しにくくなる。乱反射層３は、紫外線などの外的な処理で不可視印刷部２を可視化した際に、不可視印刷部２を目視で確認できる程度の透明性を有することが好ましい。乱反射層３の形成方法としては、最表層をエッチングして微細な凹凸を形成する方法や粒子が分散したインキを印刷して形成する方法などがあるが、特に方法は限定されない。不可視印刷部２の読み取り防止性能が低下しない範囲であれば、乱反射層３は、基材１の全面を完全に覆っていなくてもよく、基材の全域にわたって点状に存在し、実質的に覆っていてもよい。 <3. Diffuse reflection layer>
The irregular reflection layer 3 has a function of irregularly reflecting incident light. By providing the irregular reflection layer 3 on the base material 1 and the invisible printing portion 2 (the base material 1 and the visible printing portion 6 and the invisible printing portion 2 in FIG. 2), light incident on the printed matter 11 is irregularly reflected, and 1 and the difference in the light reflection state between the stepped region of the invisible printing unit 2 and the other region is reduced, so that the stepped region is less noticeable. As a result, it becomes difficult to visually confirm the invisible printing unit 2. It is preferable that the irregular reflection layer 3 has such transparency that the invisible printed portion 2 can be visually confirmed when the invisible printed portion 2 is visualized by external processing such as ultraviolet rays. Examples of the method of forming the irregular reflection layer 3 include a method of forming fine irregularities by etching the outermost layer and a method of printing and forming an ink in which particles are dispersed, but the method is not particularly limited. As long as the reading prevention performance of the invisible printing portion 2 is not reduced, the irregular reflection layer 3 may not completely cover the entire surface of the substrate 1, and may be present in a dotted manner over the entire region of the substrate, and may be substantially formed. May be covered.

乱反射層３は、透明なベース材５と光を反射する粒子４を備えていることが好ましい。透明なベース材５と光を反射する粒子４を備える乱反射層３の場合、光を反射する粒子４の化学組成、形状、比率を変えることで、乱反射層３の透明性と乱反射性能を調整することが可能となる。そのため、基材１や可視印刷部６の色や厚み等に応じて、乱反射層３の特性を調整することで、より不可視印刷部２を確認しにくくすることができる。   The irregular reflection layer 3 preferably includes a transparent base material 5 and particles 4 that reflect light. In the case of the irregular reflection layer 3 including the transparent base material 5 and the light reflecting particles 4, the transparency and the irregular reflection performance of the irregular reflection layer 3 are adjusted by changing the chemical composition, shape and ratio of the light reflecting particles 4. It becomes possible. Therefore, by adjusting the characteristics of the irregular reflection layer 3 according to the color and thickness of the base material 1 and the visible printing portion 6, the invisible printing portion 2 can be made more difficult to confirm.

透明なベース材５は、透明性を有する材料であれば特に限定されず、例えば、ポリスチレン、ポリカーボネート、アクリル樹脂等を用いることができる。乱反射層３の耐候性、耐摩耗性を向上するために、不可視印刷部２の読み取り防止性能を阻害しない範囲でベース材５は添加物を含有することができる。   The transparent base material 5 is not particularly limited as long as it is a material having transparency. For example, polystyrene, polycarbonate, acrylic resin, or the like can be used. In order to improve the weather resistance and abrasion resistance of the irregular reflection layer 3, the base material 5 can contain additives as long as the readability of the invisible printed portion 2 is not impaired.

透明なベース材５中に配置される粒子４としては、光を反射する機能を有していればよく、アルミニウム、マイカなどを用いることができる。粒子４の形状は、球状の他、鱗片状、棒状など非球状であってもよく、基材１や可視印刷部６の材質や色調に応じ適宜選択できる。粒子４の表面は、樹脂中での分散性を向上するために、修飾されていてもよい。   The particles 4 disposed in the transparent base member 5 only need to have a function of reflecting light, and aluminum, mica, or the like can be used. The shape of the particles 4 may be non-spherical, such as flake-like or rod-like, in addition to the spherical shape, and can be appropriately selected according to the material and color tone of the base material 1 and the visible printing portion 6. The surface of the particles 4 may be modified in order to improve dispersibility in the resin.

乱反射層３は、偏光顔料を備えることが好ましい。ここで、偏光顔料（パール顔料）は、光の角度によって、色調が変わる顔料（粒子）をいい、例えば二酸化チタンで被覆された薄板状雲母粒子などをいう。乱反射層３が偏光顔料を備えることで、印刷物１１を見る角度で印刷物１１の色調が変化することになる。そのため、不可視印刷部２と基材１（又は可視印刷部６）との段差がさらに目立ちにくくなる。乱反射層３には、偏光顔料以外にも乱反射性能を向上させる目的で光を反射する粒子を併せて用いてもよい。偏光顔料は複数種類を併せて使用してもよい。偏光顔料を備える乱反射層３は、偏光顔料を含むインキによって印刷して形成しても、偏光顔料を含有するラミネートフィルムをラミネートすることで形成してもよい。   The irregular reflection layer 3 preferably includes a polarizing pigment. Here, the polarizing pigment (pearl pigment) refers to a pigment (particle) whose color tone changes depending on the angle of light, for example, lamellar mica particles coated with titanium dioxide. When the irregular reflection layer 3 includes the polarizing pigment, the color tone of the printed matter 11 changes depending on the angle at which the printed matter 11 is viewed. For this reason, the step between the invisible printing portion 2 and the base material 1 (or the visible printing portion 6) becomes less noticeable. In addition to the polarizing pigment, particles that reflect light may be used in the irregular reflection layer 3 for the purpose of improving the irregular reflection performance. A plurality of types of polarizing pigments may be used in combination. The irregular reflection layer 3 provided with a polarizing pigment may be formed by printing with an ink containing a polarizing pigment, or may be formed by laminating a laminate film containing a polarizing pigment.

＜４．透明層＞
図３は、基材１と可視印刷部６と不可視印刷部２と、乱反射層３と、の間に配置された透明層７を更に備える本発明に係る印刷物１３の模式断面図である。図３のように、透明層７が基材１（又は可視印刷部６）と不可視印刷部２を覆っているため、前記段差領域７ａにおいて透明層７の高さは滑らかに変化する。そのため、基材１と不可視印刷部２との段差（又は可視印刷部６と不可視印刷部２との段差）に由来し印刷物１３の最表層に現れる段差が小さくなる。その結果、目視により不可視印刷部２を確認しにくくなる。透明層７は、印刷やラミネート等によって形成することができ、材質は、ポリカーボネート、アクリルなど透明な材料であれば特に限定されない。 <4. Transparent layer>
FIG. 3 is a schematic cross-sectional view of a printed matter 13 according to the present invention further including a transparent layer 7 disposed between the base material 1, the visible print portion 6, the invisible print portion 2, and the irregular reflection layer 3. As shown in FIG. 3, since the transparent layer 7 covers the base material 1 (or the visible printing portion 6) and the invisible printing portion 2, the height of the transparent layer 7 changes smoothly in the step region 7a. Therefore, the step that appears in the outermost layer of the printed matter 13 due to the step between the base material 1 and the invisible printing section 2 (or the step between the visible printing section 6 and the invisible printing section 2) is reduced. As a result, it becomes difficult to visually confirm the invisible printing unit 2. The transparent layer 7 can be formed by printing, lamination, or the like, and the material is not particularly limited as long as it is a transparent material such as polycarbonate or acrylic.

図４は、不可視印刷部２の上に可視印刷部６を備える別の実施形態に係る印刷物１４の模式図である。本実施形態の場合、可視印刷部６は不可視印刷部２の上に印刷され形成される。本発明の印刷物１４において、基材１及び乱反射層３及び可視印刷部６は赤外線又は紫外線を透過し、不可視印刷部２は、赤外線又は紫外線を透過しないことが好ましい。本発明の印刷部１４に対し、赤外線又は紫外線を照射すると不可視印刷部２では赤外線又は紫外線が透過しないが、それ以外の部分では透過するため、印刷物１４を透過した赤外線又は紫外線をセンサー等で可視化することで不可視情報が視認可能となる。本発明の印刷物１４では、乱反射層３が基材１と可視印刷部６との上に設けられているため、印刷物１４に入射する光を乱反射して、可視印刷部６の段差領域６ａとそれ以外の領域の反射状態の違いを小さくし、段差領域６ａを目立ち難くする。その結果、不可視印刷部２に印刷された不可視情報を目視により確認しにくくなる。   FIG. 4 is a schematic diagram of a printed matter 14 according to another embodiment including the visible printing unit 6 on the invisible printing unit 2. In the case of the present embodiment, the visible printing unit 6 is printed and formed on the invisible printing unit 2. In the printed matter 14 of the present invention, it is preferable that the substrate 1, the irregular reflection layer 3, and the visible printing portion 6 transmit infrared rays or ultraviolet rays, and the invisible printing portion 2 does not transmit infrared rays or ultraviolet rays. When the printing section 14 of the present invention is irradiated with infrared rays or ultraviolet rays, the invisible printing section 2 does not transmit the infrared rays or ultraviolet rays, but transmits the infrared rays or ultraviolet rays in the other portions. By doing so, the invisible information becomes visible. In the printed matter 14 of the present invention, since the irregular reflection layer 3 is provided on the base material 1 and the visible printing part 6, the light incident on the printed matter 14 is irregularly reflected, and the step region 6a of the visible printing part 6 and the The difference in the reflection state in the other region is reduced, and the step region 6a is less noticeable. As a result, it becomes difficult to visually confirm the invisible information printed on the invisible printing unit 2.

以上説明したように、本実施形態に係る印刷物１１〜１４を用いれば、乱反射層３に入射する光が乱反射するため、基材１と不可視印刷部２の段差領域とそれ以外の領域での光の反射状態の違いを小さくし、段差領域を目立たなくすることができる。そのため、目視により不可視印刷部２を確認しにくくすることが可能となる。   As described above, when the printed materials 11 to 14 according to the present embodiment are used, the light incident on the irregular reflection layer 3 is irregularly reflected, so that the light in the step region of the base material 1 and the invisible printing portion 2 and in the other regions Can be made small, and the step region can be made inconspicuous. Therefore, it is possible to make it difficult to visually confirm the invisible printing unit 2.

なお、本発明の技術的範囲は前記実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲において種々の変更を加えることが可能である。
例えば、乱反射層３の上に耐摩耗性を向上するための耐摩耗層を形成してもよい。
その他、本発明の趣旨に逸脱しない範囲で、前記実施形態における構成要素を周知の構成要素に置き換えることは適宜可能であり、また、前記した変形例を適宜組み合わせてもよい。 Note that the technical scope of the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention.
For example, a wear resistant layer for improving wear resistance may be formed on the irregular reflection layer 3.
In addition, it is possible to appropriately replace the components in the above-described embodiment with well-known components without departing from the spirit of the present invention, and the above-described modifications may be appropriately combined.

本発明の印刷物は、製品の真偽を識別するための印刷物を扱う産業に利用することができる。   The printed matter of the present invention can be used in an industry that handles printed matter for identifying the authenticity of a product.

１：基材
２：不可視印刷部
３：乱反射層
４：粒子
５：透明なベース材
６：可視印刷部
７：透明層
１１：印刷物
１２：印刷物
１３：印刷物
１４：印刷物 1: base material 2: invisible printed portion 3: irregularly reflective layer 4: particle 5: transparent base material 6: visible printed portion 7: transparent layer 11: printed matter 12: printed matter 13: printed matter 14: printed matter

Claims (5)

基材と、
前記基材上に印刷され、熱又は光を照射することにより視認可能となる不可視印刷部と、
前記基材及び前記不可視印刷部を覆う乱反射層と、
を備える印刷物。 A substrate,
An invisible printing portion that is printed on the base material and becomes visible by irradiating heat or light,
A diffuse reflection layer covering the base material and the invisible printed portion,
Printed matter provided with. 前記基材上に印刷された可視印刷部を備える請求項１記載の印刷物。   The printed matter according to claim 1, further comprising a visible print portion printed on the base material. 前記乱反射層は、透明なベース材と、前記ベース材内に配置され光を反射する粒子と、を備える請求項１又は２記載の印刷物。   The printed matter according to claim 1, wherein the irregular reflection layer includes a transparent base material and light-reflecting particles disposed in the base material. 前記乱反射層は、偏光顔料を備える請求項１乃至３いずれか１項に記載の印刷物。   The printed matter according to any one of claims 1 to 3, wherein the irregular reflection layer includes a polarizing pigment. 前記基材及び前記不可視印刷部と、前記乱反射層と、の間に配置された透明層を
更に備える請求項１乃至４いずれか１項に記載の印刷物。 The printed matter according to any one of claims 1 to 4, further comprising a transparent layer disposed between the substrate and the invisible printed portion and the irregular reflection layer.
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WO2023080016A1 (en) * 2021-11-04 2023-05-11 日東電工株式会社 Optical multilayer body and system

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JP2007062356A (en) * 2005-08-01 2007-03-15 Kyodo Printing Co Ltd Forgery preventive printed matter
JP2008162184A (en) * 2006-12-28 2008-07-17 Dainippon Printing Co Ltd Forgery-proof printing medium and genuineness judging method of forgery-proof printing medium
JP2014127140A (en) * 2012-12-27 2014-07-07 Dainippon Printing Co Ltd Information recording matter

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JPS58134782A (en) * 1982-02-05 1983-08-11 Kyodo Printing Co Ltd Reference print
JPH07195819A (en) * 1993-12-30 1995-08-01 Casio Comput Co Ltd Invisible printing method and invisible printed matter
US20040029137A1 (en) * 2000-07-28 2004-02-12 Sebastien De Lamberterie Secure optically readable adhesive or coating liquid product, method for marking products with a liquid ink and uses of said product
JP2007062356A (en) * 2005-08-01 2007-03-15 Kyodo Printing Co Ltd Forgery preventive printed matter
JP2008162184A (en) * 2006-12-28 2008-07-17 Dainippon Printing Co Ltd Forgery-proof printing medium and genuineness judging method of forgery-proof printing medium
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023080016A1 (en) * 2021-11-04 2023-05-11 日東電工株式会社 Optical multilayer body and system

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