JP4009495B2 - Anti-counterfeit sheet - Google Patents
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- JP4009495B2 JP4009495B2 JP2002190948A JP2002190948A JP4009495B2 JP 4009495 B2 JP4009495 B2 JP 4009495B2 JP 2002190948 A JP2002190948 A JP 2002190948A JP 2002190948 A JP2002190948 A JP 2002190948A JP 4009495 B2 JP4009495 B2 JP 4009495B2
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Description
【０００１】
【発明の属する技術分野】
本発明は、偽造防止用シートに関するものであり、さらに詳しくは、隠蔽（秘匿）情報（ステルス情報）の偽造防止効果、改竄防止効果が高い領収書、有価証券、各種カードなどのシートに関するものである。
【０００２】
【従来の技術】
従来、紫外線によって発光する蛍光材を含み、一般光の下では無色の蛍光インク（ヒドンインク）を使用し、例えば、カードなどの隠蔽情報記入欄などにこの蛍光インクを用いて画像・文字などを印字すると、印字された画像・文字などは肉眼では見えないが、この潜像にＵＶランプ（俗にいうブラックライト）をもって紫外線を照射すると、蛍光材が発光して画像・文字などを読んだり見たりできる偽造防止用シートが知られている。
【０００３】
【発明が解決しようとする課題】
しかし、従来は蛍光インクを用いて手書きでカードなどのシート面に画像・文字などの隠蔽（秘匿）情報を形成したり、蛍光インクをカードなどのシート面に塗布した後、必要に応じて乾燥して画像・文字などの隠蔽（秘匿）情報を印字形成していたので、手書きの場合は効率が悪く、一方、印刷法の場合は生産性には優れているが、隠蔽（秘匿）情報の大きさや形状の自由度が小さく、所定の大きさや形状のものに限定されるという問題があった。
本発明の目的は、従来の問題に鑑み、隠蔽（秘匿）情報の大きさや形状などを自由に変えることができ、しかも偽造防止効果、改竄防止効果が高く、領収書、有価証券、磁気カード、ＩＣカード、リライトカードなどに適用できる安価な偽造防止用シートを提供することである。
【０００４】
【課題を解決するための手段】
すなわち、前記課題を解決するための、本発明の請求項１の偽造防止用シートは、有色のシート面の所定部に、この有色のシートと識別困難な同色系の有色トナーを用いた隠蔽情報が印字されてなるシートであって、前記有色トナーに、前記有色のシートと識別困難な同色系の有色の蛍光材が含有されており、
少なくとも、前記有色トナーによる隠蔽情報が形成されてなる部位のシート面に、前記有色トナーのバインダ樹脂成分と同一種類のバインダ樹脂成分を含有するとともに、前記有色トナーの有色顔料および／または有色染料と同一種類の有色顔料および／または有色染料を含有してなるトナー受容層が形成され、このトナー受容層の所定部に有色トナーを用いた隠蔽情報が印字されていることを特徴とする。
【０００５】
本発明の偽造防止用シートは、色物シート（色紙など）などの有色のシート面の所定部に、この有色のシートと識別困難な同色系の有色顔料および／または有色染料とバインダ樹脂成分を主成分として含有しかつ、有色のシートと識別困難な同色系の有色の蛍光材を含有する有色トナーを用いて電子写真方式により隠蔽情報が印字されている。電子写真方式により隠蔽情報が印字されるので、隠蔽情報の大きさや形状などを自由に変えることができ、しかも印字された画像・文字などは有色のシートと識別困難な同色系の有色トナーを用いて有色のシート面に印字されているので、視認不能あるいは視認困難となるため、意匠性が損なわれず、この潜像にＵＶランプをもって紫外線を照射すると、蛍光材が発光して隠蔽情報の画像・文字などを容易に読んだり見たりできるので、偽造防止効果、改竄防止効果が高い。
蛍光材も、前記有色のシートと識別困難な同色系の有色の蛍光材を用いると、肉眼では一層見えないかあるいは見え難くなり、偽造防止効果、改竄防止効果が向上する。
シート面に形成されたトナー受容層が、有色トナーのバインダ樹脂成分と同一種類のバインダ樹脂成分を含有してなるため、有色トナーのトナー受容層への定着性が高まり、画像や文字が好適に形成できる。
シート面に形成されたトナー受容層が、有色トナーの発像成分（有色顔料および／または有色染料）と同一種類の発像成分（有色顔料および／または有色染料）を含有してなるため、トナー受容層面に形成された画像や文字は定着性と共に視認性がさらに困難になり、偽造防止効果が一層高まることになる。
【００１２】
【発明の実施の形態】
以下、本発明の実施の形態を詳細に説明する。
図１は、本発明の偽造防止用シートの一例を示す説明図である。
本発明の偽造防止用シート１は、色物シート（色紙など）などの有色のシート（領収書、有価証券、各種カードなど）２面の所定部に、有色のシート２と識別困難な同色系の有色顔料および／または有色染料とバインダ樹脂成分を主成分として含有し、かつ有色のシート２と識別困難な同色系の有色の蛍光材を含有する有色トナーを用いて電子写真方式により隠蔽情報３が印字されている。
隠蔽情報３は電子写真方式により印字されるので、隠蔽情報３の大きさや形状などを自由に変えることができ、しかも印字された画像・文字など３は有色のシート２と識別困難な同色系の有色トナーを用いて有色のシート２面に印字されているので、視認不能かあるいは視認困難となり、したがって隠蔽情報３が印字されていても意匠性が損なわれず、偽造防止効果、改竄防止効果が高い。この潜像３にＵＶランプをもって紫外線を照射すると、蛍光材が発光して画像・文字など３を容易に読んだり見たりできる。
【００１３】
図２は本発明の偽造防止用シートの他の例の断面を示す断面説明図である。
本発明の偽造防止用シート（カード）１Ａは、図示しないセンターコア材と呼ばれる不透明塩化ビニル樹脂やポリエチレンテレフタレート樹脂などからなる熱可塑性樹脂に透明塩化ビニル樹脂などからなる図示しないオーバーシート材を積層してなる定型サイズの有色のシート（カード基材）２Ａの上面の所定部に（少なくとも、前記有色トナーによる画像や文字が形成されてなる部位のシート面）、この有色のカード基材２Ａと識別困難な同色系の有色のトナー受容層４が形成されており、そしてこの有色のトナー受容層４面の所定部に有色のカード基材２Ａと識別困難な同色系の有色顔料および／または有色染料とバインダ樹脂成分を主成分として含有し、かつ有色のカード基材２Ａと識別困難な同色系の有色の蛍光材を含有する有色トナーを用いて電子写真方式により隠蔽情報３が印字されている。
隠蔽情報３は電子写真方式により印字されるので、隠蔽情報３の大きさや形状などを自由に変えることができ、しかも、印字された画像・文字など３は有色のカード基材２Ａと識別困難な同色系の有色トナーを用いて有色のトナー受容層４面に印字されているので、視認不能かあるいは視認困難となり、したがって、隠蔽情報３が印字されていても意匠性が損なわれず、偽造防止効果、改竄防止効果が高い。この潜像３にＵＶランプをもって紫外線を照射すると、蛍光材が発光して画像・文字など３を容易に読んだり見たりできる。隠蔽情報３は有色のトナー受容層４との接着性が向上し、例えば、こすられても隠蔽情報３が剥がれたりしない。
次に電子写真方式印刷について述べる。
電子写真方式印刷は、一般的には光導電性絶縁体（ホトコンドラムなど）を利用し、コロナ放電などにより光導電性絶縁体上に一様な静電荷を与え、各種の手段によりこの光導電性絶縁体上に光像を照射することによって静電潜像を形成し、次いで、潜像をトナー微粉末を用いて現像可視化し、紙などにトナー画像を転写した後、加圧、加熱、溶剤蒸発、光などの照射などの手段により紙などの記録媒体上にトナー画像を定着させて複写物を得る方法（例えば、米国特許第２２９７６９１号など）や、光導電性絶縁体上に光像を照射する方法などがある。
これらのトナーとしては、従来は天然または合成高分子よりなるバインダー樹脂成分中に発像成分としてカーボンブラックなどの有色顔料ないし有色染料を分散させたものを５〜２０μｍ程度に微粉砕した粒子が用いられている。かかるトナーは通常トナー単体もしくは鉄粉、ガラスビーズなどの担体物質（キャリア）と混合して用いられる。
【００１４】
本発明で用いる有色トナーのバインダー樹脂成分としては、従来トナーのバインダー樹脂成分として用いられている天然および／または合成高分子を挙げることができる。
本発明で用いるバインダー樹脂成分の具体例としては、例えばポリエステル、ポリエチレン、ポリスチレンやスチレン共重合体（例えば、スチレン−アクリル樹脂、スチレン−ブタジエン樹脂など）、アクリレートおよびメタクリレート樹脂、ポリ塩化ビニル樹脂、酢酸ビニル樹脂、塩化ビニル／酢酸ビニル共重合樹脂、塩化ビニル／酢酸ビニル／マレイン酸共重合樹脂、ビニルブチラール樹脂、ポリビニルアルコール樹脂、ポリウレタン樹脂、ポリイミド樹脂、ポリアミド樹脂、ポリエーテル樹脂、エポキシ系樹脂などを挙げることができる。これらは２種以上混合して用いることもできる。
【００１５】
これらの中でも透明な熱可塑性バインダー樹脂成分は本発明において好ましく使用できる。
とりわけバインダ樹脂成分がトナーの発像成分である有色顔料および／または有色染料を透視可能な透明性を有するものは、電子写真方式により印字される隠蔽情報３の色度が向上し、隠蔽情報３が有色のシートと識別困難な同色系の有色となるので、隠蔽情報３が一層視認不能あるいは視認困難となるので本発明においてさらに好ましく使用できる。
【００１６】
本発明で用いる有色トナーの有色顔料および／または有色染料は、本発明で用いる有色のシートと識別困難な同色系のものであればよく、赤、橙、黄、緑、青、藍、紫などあるいはこれらの２種以上の混合色などいずれでもよく、公知の天然品、合成品あるいはこれらの２種以上の混合物を用いることができる。
有色トナー中の有色顔料および／または有色染料の含有量や粒度などは特に限定されず、本発明で用いる有色のシートと識別困難な同色となるようにかつ有色のシートと平滑度や光沢などが違和感がないように設計することが好ましい。
【００１７】
そして、本発明で用いる有色トナーの蛍光材は有機系蛍光材でも無機系蛍光材でもあるいはこれらの２種以上の混合物でもよく、公知の蛍光材を用いることができる。
有機系蛍光材としては、具体的には、ドナー−アクセプター型、シアニン型、非環状あるいは環状ポリエン型などの蛍光染料を挙げることができ、また、スチルベン、４，４’−ジアミノスチルベン、ビフェニル、複素５員環（トリアゾール、オキサゾール、イミダゾールなど）、複素６員環（クマリン、ナフタルイミド、ｓ−トリアジンなど）の誘導体などの蛍光増白剤あるいはこれらの２種以上の混合物を挙げることができる。
【００１８】
無機系蛍光材としては、具体的には、純度の高い亜鉛、カドミウム、カルシウム、バリウム、マグネシウム、アルミニウム、イットリウム、などの金属の酸化物、硫化物、ケイ酸塩、タングステン酸塩、酸素酸塩などを主成分とし、これに微量のマンガン、銀、銅、鉛、ユーロピウムなどの活性化剤および融剤を添加して、高温で焼成したものあるいはこれらの２種以上の混合物を挙げることができる。
【００１９】
また本発明においては、アクリル系樹脂、塩化ビニル系樹脂、アルキド樹脂などの透明性を有する合成樹脂に蛍光染料を配合した蛍光顔料を使用することもできる。
これらの蛍光材の中でも、前記有色のシートと識別困難な同色系の有色の蛍光材は隠蔽情報３が肉眼で見えないかあるいは一層見え難くなり、偽造防止効果、改竄防止効果が向上するので本発明において好ましく使用できる。
【００２０】
本発明で用いる有色トナー中の蛍光材の配合量は特に限定されるものではないが、好ましくは有色トナー１００質量部に対して、蛍光材を０．１〜５質量部、より好ましくは０．２〜４質量部配合することが望ましい。０．１質量部未満では蛍光量が少なく発光を確認できない恐れがあり、５質量部を超えても蛍光量が増えず不経済となる。
【００２１】
本発明で用いる有色トナーには、さらに所望に応じて慣用されている添加成分、例えば、帯電制御剤、粘着付与剤、粘度調整剤、酸化防止剤、紫外線吸収剤、安定剤、滑剤などを少量含有させることができる。
【００２２】
本発明で用いる有色トナーのバインダー樹脂成分の種類や分子量、有色トナー中のバインダー樹脂成分や有色顔料および／または有色染料の含有量などは、本発明の偽造防止用シートの特性、デザインや使用する電子写真方式に合わせるなどして最適に調整されるものであり、特に限定されるものではない。しかし有色トナー中のバインダー樹脂成分の含有量は、通常５０〜９５質量％である。
【００２３】
本発明で用いる有色トナーは、従来公知の方法で製造できる。すなわち、バインダー樹脂成分、有色顔料および／または有色染料、蛍光材および要すれば帯電制御剤などを、例えば加圧ニーダ、ロールミル、エクストルーダなどにより溶融混練して均一に分散し、例えばジェットミルなどにより微粉砕して、風力分級機などの分級機により分級して所望のトナーを得ることができる。本発明で用いる有色トナーの粒子径は、従来公知のトナーの粒子径と同じでよく、具体的には約３〜２０μｍ程度、好ましくは１０μｍ前後である。
【００２４】
本発明で用いる有色のシートの素材としては、ガラス繊維、アルミナ繊維、ポリエステル繊維、ポリアミド繊維などの無機または有機繊維からなる織布、不織布、マット、紙（例えば、上質紙、中質紙、合成紙、各種再生紙、アート紙、コート紙、ミラーコート紙、コンデンサー紙、パラフィン紙、その他の紙の他に、それにオーバーコート層（保護層）をもつ用紙など）あるいはこれらを組み合わせたもの、あるいはこれらに樹脂ワニスを含浸させて成形した複合シート、ポリアミド系樹脂シート、ポリエステル系樹脂シート、ポリオレフィン系樹脂シート、ポリイミド系樹脂シート、エチレン・ビニルアルコール共重合体シート、ポリビニルアルコール系樹脂シート、ポリ塩化ビニル系樹脂シート、ポリ塩化ビニリデン系樹脂シート、ポリスチレン系樹脂シート、ポリカーボネート系樹脂シート、アクリロニトリルブタジエンスチレン共重合系樹脂シート、ポリエーテルスルホン系樹脂シートなどのプラスチックシート、あるいはこれらにコロナ放電処理、プラズマ処理、紫外線照射処理、電子線照射処理、フレームプラズマ処理およびオゾン処理などの表面処理を施したもの、などの公知のものから選択して用いることができる。
【００２５】
有色のシート面にこの有色のシートと識別困難な同色系の有色のトナー受容層を形成する方法や手段などは特に限定されるものではない。しかし、前記有色顔料および／または有色顔料を含む紫外線硬化型塗料からなる塗工液を用いて有色のシート面に塗工して有色のトナー受容層を形成する方法は、有色のシート面への塗工が容易で、公知の方法で有色のシート面に塗工後、必要に応じて乾燥し、紫外線照射して有色のトナー受容層を容易に形成できる上、有色トナーの定着性を一層向上できるので好ましく使用できる。
有色トナーの有色顔料および／または有色顔料と同一種類の有色顔料および／または有色顔料を配合した紫外線硬化型塗料からなる塗工液を用いて有色のトナー受容層を形成すれば、有色のシートと有色トナー受容層の識別が一層困難となるので好ましい。
【００２６】
有色のトナー受容層を形成するための紫外線硬化型塗料は、紫外線照射によって生じるバインダ樹脂成分の重合反応による樹脂形成に伴う硬化手段を応用した、従来公知の紫外線硬化型塗料に基づくものであり、光重合性オリゴマ（プレポリマ）および／または光重合性モノマ、光重合開始剤を必須成分として含み、他に必要に応じて帯電防止剤、光重合促進剤、安定剤、ワックスなどの各種添加剤を含むことができる。
【００２７】
そして、さらに、この紫外線硬化型塗料が、本発明で用いる有色トナーを構成するバインダ樹脂成分と同種のバインダ樹脂成分を含有すると、加熱溶融時に有色トナーと有色のトナー受容層４との相溶融性が非常に高くなり、有色トナーの定着性が著しく向上する。紫外線硬化型塗料に含有されるバインダ樹脂成分の含有形態は、バインダ樹脂成分を光重合反応で形成する光重合性オリゴマないしモノマの状態で存在させたり、有色トナーを構成するバインダ樹脂成分を微細粒子状に粉砕し、これを塗料中に分散させたり、あるいはこれらを共存させるものである。
そして、特に好ましくは、スチレンアクリル系熱可塑性樹脂成分もしくはエポキシアクリル系熱可塑性樹脂成分を重合形成する光重合性オリゴマないし光重合性モノマあるいはこの樹脂成分の微細粒子である。これらの樹脂成分を含有した有色のトナー受容層４を設けた場合には、その他の樹脂のものに比べ、有色トナーの定着性が格段に優れる。
【００２８】
紫外線硬化型塗料中におけるバインダ樹脂成分の含有率は、５０質量％以下であると所定の有色トナー定着性が得られない一方、９５質量％を超えると印刷インクとしての適性が損なわれるため、その含有率は５０〜９５質量％であることが好ましく、さらに好ましくは６０〜９０質量％、特に好ましくは７０〜８０質量％が望ましい。
紫外線硬化型塗料中における有色顔料および／または有色顔料の含有率は特に限定されるものではないが、有色のトナー受容層が有色のシートと識別困難となるように調整することが肝要である。
【００２９】
また、光重合性モノマの量が多いと有色のトナー受容層４の硬度が高くなりすぎてシート面への定着や擦れによる剥離が生じるため、所望の硬度が得られるように適宜調整するものである。さらに、バインダ樹脂成分の微細粒子を含有させる場合は、その含有率が高いと印刷インクとしての適性が低下するため、その含有率は２０質量％以下が好ましい。
【００３０】
光重合開始剤としては、従来公知のラジカル重合タイプのものでよく、例えば、ベンゾエーテル類、アセトフェノン類、ケタール類、チオキサントン類が挙げられ、具体的には、４，４ビスジメチルアミノベンゾフェノン、１−ヒドロキシシクロヘキシルフェニルケトン、２，２−ジメトキシ−２−フェニルアセトフェノン、２−ヒドロキシ−２−メチル−１−フェニルプロパン−１−オン、オルベンゾイル安息香酸メチルエステルなどがある。
【００３１】
なお、上記実施形態の説明は、本発明を説明するためのものであって、特許請求の範囲に記載の発明を限定し、或は範囲を減縮するものではない。又、本発明の各部構成は上記実施形態に限らず、特許請求の範囲に記載の技術的範囲内で種々の変形が可能である。
【００３２】
【発明の効果】
本発明の請求項１の偽造防止用シートは、色物シート（色紙など）などの有色のシート面の所定部に、この有色のシートと識別困難な同色系の有色顔料および／または有色染料とバインダ樹脂成分を主成分として含有しかつ有色のシートと識別困難な同色系の有色の蛍光材を含有する有色トナーを用いて電子写真方式により隠蔽情報が印字されているので、隠蔽情報の大きさや形状などを自由に変えることができ、しかも印字された画像・文字などは有色のシートと識別困難な同色系の有色トナーを用いて有色のシート面に印字されているので、視認不能かあるいは視認困難となり、したがって意匠性が損なわれず、この潜像にＵＶランプをもって紫外線を照射すると、蛍光材が発光して画像・文字などを容易に読んだり見たりでき、偽造防止効果、改竄防止効果が高く、領収書、有価証券、磁気カード、ＩＣカード、リライトカードなどに適用できるという顕著な効果を奏する。
蛍光材も、前記有色のシートと識別困難な同色系の有色の蛍光材を用いると、肉眼では一層見えないかあるいは見え難くなり、偽造防止効果、改竄防止効果が向上する。
シート面に形成されたトナー受容層が、有色トナーのバインダ樹脂成分と同一種類のバインダ樹脂成分を含有してなるため、有色トナーのトナー受容層への定着性が高まり、画像や文字が好適に形成できるという顕著な効果を奏する。
シート面に形成されたトナー受容層が、有色トナーの発像成分（有色顔料および／または有色染料）と同一種類の発像成分（有色顔料および／または有色染料）を含有してなるため、トナー受容層面に形成された画像や文字は定着性と共に視認性がさらに困難になり、偽造防止効果が一層高まるという顕著な効果を奏する。
【図面の簡単な説明】
【図１】本発明の偽造防止用シートの一例を示す説明図である。
【図２】本発明の偽造防止用シートの他の例の断面を示す断面説明図である。
【符号の説明】
１ 偽造防止用シート
１Ａ 偽造防止用シート（カード）
２ 有色のシート
２Ａ 有色のシート（カード基材）
３ 文字
４ 有色のトナー受容層[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an anti-counterfeit sheet, and more particularly, to an anti-counterfeiting (confidential) information (stealth information) anti-counterfeiting effect, an anti-counterfeiting receipt, securities, various cards, and the like. is there.
[0002]
[Prior art]
Conventionally, it contains fluorescent material that emits light by ultraviolet rays, and under normal light, colorless fluorescent ink (hidden ink) is used. For example, images and characters are printed using this fluorescent ink in concealment information entry fields such as cards. Then, the printed images / characters cannot be seen with the naked eye, but when this latent image is irradiated with ultraviolet rays with a UV lamp (commonly known as black light), the fluorescent material emits light and the images / characters can be read or viewed. Anti-counterfeit sheets that can be made are known.
[0003]
[Problems to be solved by the invention]
Conventionally, however, concealment information such as images and characters is formed on the sheet surface of a card or the like by hand using fluorescent ink, or the fluorescent ink is applied to the sheet surface of a card or the like and then dried as necessary. Since the concealment (confidential) information such as images and characters is printed, the efficiency is low for handwriting, while the printing method is excellent in productivity, but the concealment (confidential) information There is a problem that the degree of freedom in size and shape is small and the size and shape are limited to those of a predetermined size and shape.
In view of the conventional problems, the object of the present invention is to freely change the size and shape of concealment (confidential) information, and has a high anti-counterfeiting effect and anti-falsification effect, such as receipts, securities, magnetic cards, An object is to provide an inexpensive anti-counterfeit sheet that can be applied to an IC card, a rewrite card, or the like.
[0004]
[Means for Solving the Problems]
In other words, the anti-counterfeit sheet according to
At least a binder resin component of the same type as the binder resin component of the colored toner is contained on the sheet surface of the portion where the concealment information by the colored toner is formed, and the colored pigment and / or the colored dye of the colored toner A toner receiving layer containing the same type of colored pigment and / or colored dye is formed, and concealment information using the colored toner is printed on a predetermined portion of the toner receiving layer .
[0005]
In the anti-counterfeit sheet of the present invention, a colored pigment and / or a colored dye and a binder resin component, which are difficult to distinguish from the colored sheet, are formed on a predetermined portion of a colored sheet surface such as a colored sheet (colored paper). Concealment information is printed by an electrophotographic method using a colored toner containing a fluorescent material of the same color that is contained as a main component and difficult to distinguish from a colored sheet . Since the concealment information is printed by the electrophotographic method, the size and shape of the concealment information can be freely changed, and the printed images and characters use the same color toner that is difficult to distinguish from the colored sheet. Since it is printed on a colored sheet surface, it becomes invisible or difficult to see, so the design is not impaired. When this latent image is irradiated with ultraviolet rays with a UV lamp, the fluorescent material emits light and the image of the concealment information Since characters can be easily read and viewed, it is highly effective in preventing counterfeiting and tampering.
If a fluorescent material of the same color system that is difficult to distinguish from the colored sheet is used as the fluorescent material, the fluorescent material becomes invisible or difficult to see with the naked eye, and the anti-counterfeit effect and the anti-falsification effect are improved.
Since the toner receiving layer formed on the sheet surface contains the same kind of binder resin component as that of the colored toner, the fixing property of the colored toner to the toner receiving layer is improved, and images and characters are preferably used. Can be formed.
Since the toner receiving layer formed on the sheet surface contains the same kind of image forming component (colored pigment and / or colored dye) as the image forming component (colored pigment and / or colored dye) of the colored toner, the toner The image and characters formed on the receiving layer surface become more difficult to see together with the fixability, and the forgery prevention effect is further enhanced.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is an explanatory diagram showing an example of the anti-counterfeit sheet according to the present invention.
The
Since the
[0013]
FIG. 2 is a cross-sectional explanatory view showing a cross section of another example of the anti-counterfeit sheet of the present invention.
The anti-counterfeit sheet (card) 1A of the present invention is formed by laminating an unillustrated oversheet material made of a transparent vinyl chloride resin or the like on a thermoplastic resin made of opaque vinyl chloride resin or polyethylene terephthalate resin called a center core material not shown. A colored sheet (card base material) 2A having a standard size formed on the upper surface of the colored sheet (card base material) 2A (at least on the sheet surface where the image or character is formed with the colored toner) is distinguished from the colored
Since the
Next, electrophotographic printing will be described.
Electrophotographic printing generally uses a photoconductive insulator (such as a photocon drum), gives a uniform static charge on the photoconductive insulator by corona discharge, etc., and this photoconductive property is obtained by various means. An electrostatic latent image is formed by irradiating a light image on an insulator, then the latent image is developed and visualized using a fine toner powder, and the toner image is transferred to paper or the like, followed by pressurization, heating, solvent A method of obtaining a copy by fixing a toner image on a recording medium such as paper by means of evaporation, light irradiation or the like (for example, US Pat. No. 2,297,691), or a light image on a photoconductive insulator There is a method of irradiation.
As these toners, conventionally, particles obtained by dispersing a colored pigment or colored dye such as carbon black as an image forming component in a binder resin component made of a natural or synthetic polymer are finely pulverized to about 5 to 20 μm. It has been. Such toner is usually used alone or mixed with a carrier substance (carrier) such as iron powder or glass beads.
[0014]
Examples of the binder resin component of the colored toner used in the present invention include natural and / or synthetic polymers conventionally used as the binder resin component of the toner.
Specific examples of the binder resin component used in the present invention include, for example, polyester, polyethylene, polystyrene, styrene copolymers (for example, styrene-acrylic resin, styrene-butadiene resin, etc.), acrylate and methacrylate resins, polyvinyl chloride resin, acetic acid. Vinyl resin, vinyl chloride / vinyl acetate copolymer resin, vinyl chloride / vinyl acetate / maleic acid copolymer resin, vinyl butyral resin, polyvinyl alcohol resin, polyurethane resin, polyimide resin, polyamide resin, polyether resin, epoxy resin, etc. Can be mentioned. These may be used in combination of two or more.
[0015]
Among these, a transparent thermoplastic binder resin component can be preferably used in the present invention.
In particular, when the colored pigment and / or colored dye whose binder resin component is an image forming component of toner is transparent, the chromaticity of the
[0016]
The colored pigment and / or colored dye of the colored toner used in the present invention may be of the same color system that is difficult to distinguish from the colored sheet used in the present invention, such as red, orange, yellow, green, blue, indigo, purple, etc. Alternatively, any of these two or more mixed colors may be used, and known natural products, synthetic products, or a mixture of two or more of these may be used.
The content and particle size of the colored pigment and / or colored dye in the colored toner are not particularly limited, and the color sheet and the smoothness, gloss, etc. are similar to the colored sheet used in the present invention and difficult to distinguish. It is preferable to design so that there is no sense of incongruity.
[0017]
The fluorescent material of the color toner used in the present invention may be an organic fluorescent material, an inorganic fluorescent material, or a mixture of two or more of these, and a known fluorescent material can be used.
Specific examples of organic fluorescent materials include donor-acceptor type, cyanine type, non-cyclic or cyclic polyene type fluorescent dyes, and stilbene, 4,4′-diaminostilbene, biphenyl, Examples thereof include fluorescent whitening agents such as hetero 5-membered rings (triazole, oxazole, imidazole, etc.), hetero 6-membered rings (coumarin, naphthalimide, s-triazine, etc.), and mixtures of two or more thereof.
[0018]
Specific examples of inorganic fluorescent materials include high-purity zinc, cadmium, calcium, barium, magnesium, aluminum, yttrium, and other metal oxides, sulfides, silicates, tungstates, and oxyacid salts. As a main component, a trace amount of an activator such as manganese, silver, copper, lead, europium and a flux added thereto, and firing at a high temperature, or a mixture of two or more of these can be mentioned. .
[0019]
In the present invention, a fluorescent pigment in which a fluorescent dye is blended with a synthetic resin having transparency such as an acrylic resin, a vinyl chloride resin, and an alkyd resin can also be used.
Among these fluorescent materials, the colored fluorescent material of the same color system that is difficult to distinguish from the colored sheet makes the
[0020]
The blending amount of the fluorescent material in the color toner used in the present invention is not particularly limited, but it is preferably 0.1 to 5 parts by mass, more preferably 0.1 to 5 parts by mass with respect to 100 parts by mass of the color toner. It is desirable to blend 2 to 4 parts by mass. If the amount is less than 0.1 parts by mass, the amount of fluorescence is small and light emission may not be confirmed. If the amount exceeds 5 parts by mass, the amount of fluorescence does not increase, which is uneconomical.
[0021]
The colored toner used in the present invention further contains a small amount of additive components commonly used as desired, for example, charge control agents, tackifiers, viscosity modifiers, antioxidants, ultraviolet absorbers, stabilizers, lubricants and the like. It can be included.
[0022]
The type and molecular weight of the binder resin component of the colored toner used in the present invention, the content of the binder resin component, the colored pigment and / or the colored dye in the colored toner, and the like, the characteristics, design and use of the anti-counterfeit sheet of the present invention It is optimally adjusted according to the electrophotographic method and is not particularly limited. However, the content of the binder resin component in the colored toner is usually 50 to 95% by mass.
[0023]
The colored toner used in the present invention can be produced by a conventionally known method. That is, a binder resin component, a colored pigment and / or a colored dye, a fluorescent material and, if necessary, a charge control agent are melted and kneaded with a pressure kneader, a roll mill, an extruder, etc., and dispersed uniformly, for example, with a jet mill, etc. The desired toner can be obtained by pulverizing and classifying with a classifier such as an air classifier. The particle diameter of the colored toner used in the present invention may be the same as the particle diameter of a conventionally known toner, specifically about 3 to 20 μm, preferably about 10 μm.
[0024]
Colored sheets used in the present invention include woven fabrics, nonwoven fabrics, mats, and papers (for example, high-quality papers, medium-quality papers, synthetic papers) made of inorganic or organic fibers such as glass fibers, alumina fibers, polyester fibers, and polyamide fibers. Paper, various recycled paper, art paper, coated paper, mirror coated paper, condenser paper, paraffin paper, other paper, paper with an overcoat layer (protective layer) or a combination thereof, or Composite sheets formed by impregnating them with resin varnish, polyamide resin sheets, polyester resin sheets, polyolefin resin sheets, polyimide resin sheets, ethylene / vinyl alcohol copolymer sheets, polyvinyl alcohol resin sheets, polychlorinated resins Vinyl resin sheet, polyvinylidene chloride resin sheet, Plastic sheet such as styrene resin sheet, polycarbonate resin sheet, acrylonitrile butadiene styrene copolymer resin sheet, polyethersulfone resin sheet, or corona discharge treatment, plasma treatment, ultraviolet irradiation treatment, electron beam irradiation treatment, frame It can be used by selecting from known ones such as those subjected to surface treatment such as plasma treatment and ozone treatment.
[0025]
There are no particular limitations on the method or means for forming a colored toner-receiving layer of the same color system that is difficult to distinguish from the colored sheet on the colored sheet surface. However, a method for forming a colored toner receiving layer by coating a colored sheet surface using a coating liquid comprising an ultraviolet curable paint containing the colored pigment and / or the colored pigment is provided on the colored sheet surface. Easy to apply, and after applying to the colored sheet surface by a known method, it can be dried as necessary, and the colored toner-receiving layer can be easily formed by irradiating with ultraviolet rays. Since it can be used, it can be preferably used.
If a colored toner-receiving layer is formed using a coating liquid composed of an ultraviolet curable paint containing a colored pigment and / or a colored pigment of the same type as the colored pigment and / or colored pigment, This is preferable because it is more difficult to identify the colored toner receiving layer.
[0026]
The ultraviolet curable coating for forming a colored toner-receiving layer is based on a conventionally known ultraviolet curable coating that applies a curing means accompanying resin formation by a polymerization reaction of a binder resin component generated by ultraviolet irradiation, Contains photopolymerizable oligomers (prepolymers) and / or photopolymerizable monomers and photopolymerization initiators as essential components. In addition, various additives such as antistatic agents, photopolymerization accelerators, stabilizers and waxes are added as necessary. Can be included.
[0027]
Further, when this ultraviolet curable coating material contains the same kind of binder resin component as the binder resin component constituting the colored toner used in the present invention, the phase meltability of the colored toner and the colored toner receiving layer 4 during heat melting. Becomes very high, and the fixability of the colored toner is remarkably improved. The content of the binder resin component contained in the UV curable paint is such that the binder resin component is present in the form of a photopolymerizable oligomer or monomer formed by a photopolymerization reaction, or the binder resin component constituting the colored toner is finely divided. And are dispersed in the paint or coexisted with them.
Particularly preferred is a photopolymerizable oligomer or photopolymerizable monomer or a fine particle of this resin component which forms a styrene acrylic thermoplastic resin component or an epoxy acrylic thermoplastic resin component. When the colored toner receiving layer 4 containing these resin components is provided, the fixing property of the colored toner is remarkably superior to those of other resins.
[0028]
When the content of the binder resin component in the ultraviolet curable coating is 50% by mass or less, a predetermined color toner fixing property cannot be obtained. On the other hand, when it exceeds 95% by mass, the suitability as a printing ink is impaired. The content is preferably 50 to 95% by mass, more preferably 60 to 90% by mass, and particularly preferably 70 to 80% by mass.
The content of the colored pigment and / or colored pigment in the ultraviolet curable coating is not particularly limited, but it is important to adjust the colored toner receiving layer so that it is difficult to distinguish it from the colored sheet.
[0029]
Further, when the amount of the photopolymerizable monomer is large, the colored toner receiving layer 4 becomes too hard, and the sheet is fixed to the sheet surface or peeled off by rubbing. Therefore, it is appropriately adjusted so as to obtain a desired hardness. is there. Furthermore, when the fine particles of the binder resin component are contained, if the content is high, suitability as a printing ink is lowered. Therefore, the content is preferably 20% by mass or less.
[0030]
The photopolymerization initiator may be of a conventionally known radical polymerization type, and examples thereof include benzoethers, acetophenones, ketals, and thioxanthones. Specifically, 4,4 bisdimethylaminobenzophenone, 1 -Hydroxycyclohexyl phenyl ketone, 2,2-dimethoxy-2-phenylacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, olbenzoylbenzoic acid methyl ester and the like.
[0031]
The description of the above embodiment is for explaining the present invention, and does not limit the invention described in the claims or reduce the scope. Moreover, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim.
[0032]
【The invention's effect】
The anti-counterfeit sheet according to
If a fluorescent material of the same color system that is difficult to distinguish from the colored sheet is used as the fluorescent material, the fluorescent material becomes invisible or difficult to see with the naked eye, and the anti-counterfeit effect and the anti-falsification effect are improved.
Since the toner receiving layer formed on the sheet surface contains the same kind of binder resin component as that of the colored toner, the fixing property of the colored toner to the toner receiving layer is improved, and images and characters are preferably used. There is a remarkable effect that it can be formed.
Since the toner receiving layer formed on the sheet surface contains the same kind of image forming component (colored pigment and / or colored dye) as the image forming component (colored pigment and / or colored dye) of the colored toner, the toner images and characters formed on the receptive layer side visibility becomes more difficult with fixability, that Sosu a remarkable effect that the anti-fake effect is further enhanced.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing an example of an anti-counterfeit sheet according to the present invention.
FIG. 2 is a cross-sectional explanatory view showing a cross section of another example of the anti-counterfeit sheet according to the present invention.
[Explanation of symbols]
1 Anti-counterfeit sheet 1A Anti-counterfeit sheet (card)
2
3 Character 4 Colored toner receiving layer
Claims (1)
少なくとも、前記有色トナーによる隠蔽情報が形成されてなる部位のシート面に、前記有色トナーのバインダ樹脂成分と同一種類のバインダ樹脂成分を含有するとともに、前記有色トナーの有色顔料および／または有色染料と同一種類の有色顔料および／または有色染料を含有してなるトナー受容層が形成され、このトナー受容層の所定部に有色トナーを用いた隠蔽情報が印字されていることを特徴とする偽造防止用シート。A concealing information using a colored toner of the same color system that is difficult to distinguish from the colored sheet is printed on a predetermined portion of the colored sheet surface, and the colored toner is difficult to distinguish from the colored sheet. fluorescer same color system colored are contained,
At least a binder resin component of the same type as the binder resin component of the colored toner is contained on the sheet surface of the portion where the concealment information by the colored toner is formed, and the colored pigment and / or the colored dye of the colored toner Forgery prevention characterized in that a toner receiving layer containing the same kind of colored pigment and / or colored dye is formed, and concealing information using colored toner is printed on a predetermined portion of the toner receiving layer Sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002190948A JP4009495B2 (en) | 2002-06-28 | 2002-06-28 | Anti-counterfeit sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002190948A JP4009495B2 (en) | 2002-06-28 | 2002-06-28 | Anti-counterfeit sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2004037563A JP2004037563A (en) | 2004-02-05 |
| JP4009495B2 true JP4009495B2 (en) | 2007-11-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002190948A Expired - Fee Related JP4009495B2 (en) | 2002-06-28 | 2002-06-28 | Anti-counterfeit sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4009495B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4844800B2 (en) * | 2005-03-22 | 2011-12-28 | Ｄｉｃ株式会社 | Fluorescent pattern forming method, article having fluorescent pattern, laminate, magnetic recording medium, and transfer laminate for forming fluorescent pattern |
| US8962228B2 (en) | 2008-09-19 | 2015-02-24 | Xerox Corporation | Low melt color toners with fluorescence agents |
| US8257897B2 (en) * | 2008-09-19 | 2012-09-04 | Xerox Corporation | Toners with fluorescence agent and toner sets including the toners |
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2002
- 2002-06-28 JP JP2002190948A patent/JP4009495B2/en not_active Expired - Fee Related
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| JP2004037563A (en) | 2004-02-05 |
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