JP2020175664A - 紙幣などのポリマーセキュリティ文書作製用の改良ポリマーシート材料、前記改良ポリマー材料の形成方法、及び前記改良ポリマーシート材料を使用して作製されるポリマーセキュリティ文書 - Google Patents
紙幣などのポリマーセキュリティ文書作製用の改良ポリマーシート材料、前記改良ポリマー材料の形成方法、及び前記改良ポリマーシート材料を使用して作製されるポリマーセキュリティ文書 Download PDFInfo
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Abstract
Description
1.ポリマーシート材料であって、その中で光学セキュリティデバイスが、約60μm以上の厚さを有するポリマー又はポリマー基板の対向面の全面又は一部の上に直接形成(例えば鋳造)又は被覆(例えば接着剤で転写)された、任意選択で埋設された集光要素の配列と画像アイコンの配列で構成された集積化構造であり、基板は光学スペーサとして機能するポリマーシート材料。
2.ポリマーシート材料であって、その中で光学セキュリティデバイスは、ポリマー基板の1つの面の全面又は一部の上に直接形成又は被覆された画像アイコンの配列の上に位置する任意選択で埋設された集光要素の配列と、基板の対向面の全面又は一部に被覆され、その面を超えて画像アイコンを反射させる機能を持つ反射(例えば金属)面と、で構成された集積化構造であり、集光要素が画像アイコンの反射に合焦可能であって、画像アイコンの配列を超える長さの焦点距離を有する集光要素の使用を可能とするポリマーシート材料。
3.ポリマーシート材料であって、その中で光学セキュリティデバイスは、ポリマー基板の1つの面の全面又は一部の上に直接形成又は被覆された第1の画像アイコンの配列の上又は上方に位置する、任意選択で埋設された第1の集光要素の配列と、基板の対向面の全面又は一部の上に直接形成又は被覆された第2の同一又は異なる画像アイコンの配列の上又は上方に位置する、任意選択で埋設された第2の集光要素の配列とで構成された集積化構造であるポリマーシート材料。ここで、基板の1つの面上の集光要素(例えば第1の集光要素配列)は、基板の対向面上の画像アイコン(例えば第2の画像アイコン配列)に合焦する。この基板の相対向する両面から投影される像は、同一であっても異なっていてもよいし、同一又は異なる色、及び/又は光学効果(例えば運動又は移動、デプス、フローティング)を有してもよい。
4.ポリマーシート材料であって、その中で光学セキュリティデバイスは、凹型又は凸型の反射集光要素の配列と上層の画像アイコンの配列とで構成され、かつポリマー基板の一面又は対向する両面のいずれかに形成又は転写された被覆構造であるポリマーシート材料。
5.「折り畳まれた」ポリマーシート材料であって、その中で光学セキュリティデバイスは、ポリマー基板の1つの面上の遠隔部に直接形成又は被覆され、任意選択で埋設された集光要素の配列と第1の画像アイコンの配列と、基板の反対面上に(好ましくは第1の画像アイコンの配列に直接対向して)直接形成又は被覆された第2の同一又は異なる画像アイコンの配列と、で構成された、集積化構造である、「折り畳まれた」ポリマーシート材料。好適な実施形態においては、第1と第2の画像アイコン配列は基板上で互いに対向して配置され、集光要素の配列は任意選択で埋設された2つの異なる大きさの集光要素の配列であり、シート材料の集光要素配列を含む部分がこれらの配列を含むシート材料部の直上に配置されると、2つの画像が投影される。この2つの画像は、同一でも異なってもよく、同一又は異なる色及び/又は光学効果を有してもよい。
6.集積光学セキュリティデバイスを有する「二層」ポリマー又はポリマー基板の形態のポリマーシート材料であって、その中に、(i)集光要素配列が二層の間に配置され、かつ一つ又は複数の同一又は異なる画像アイコンの配列が二層基板の1つの面又は対向する両面の全面又は一部の上に形成又は被覆されるか、又は(ii)一つ又は複数の同一又は異なる画像アイコンの配列が二層基板の間に配置され、かつ1つ又は2つの任意選択で埋設された集光要素の配列が二層基板の1つの面又は対向する両面の全面又は一部の上に形成又は被覆される。ここで、画像はシート材料の1つの面又は対向する両面から投影される。画像は同一であっても異なっていてもよいし、同一又は異なる色及び/又は光学効果を有してもよい。
7.ポリマーシート材料であって、その中で光学セキュリティデバイスは、ポリマー基板の1つの面上に形成又は転写された第1の画像アイコンの配列とその下の屈折/反射混合型集光要素と、基板の対向面上に形成又は転写された第2の画像アイコンの配列とで構成された集積又は被覆構造であり、屈折/反射混合型集光要素は透過光で画像を形成し、かつ反射光で異なる画像を形成する手段を提供するポリマーシート材料。
8.ポリマーシート材料であって、その中で光学セキュリティデバイスは、薄いスペーサで離間され、かつポリマー基板の1つ面又は対向する両面上に形成又は転写された任意選択で埋設された集光要素の配列と画像アイコンの配列とで構成される被覆構造物であるポリマーシート材料。
キャリアフィルム(例えばUV透過性キャリアフィルム)に接着された「レンズモールド」層を有する微細構造担持剥離ライナーを形成するステップであって、「レンズモールド」層をネガ型レンズ形状の複数の空隙を有する硬化性樹脂で形成し、ネガ型レンズ形状はポジ型レンズ形状(すなわちポジ型レンズモールド)を有する固体表面に樹脂を押し当ててUV硬化させて作製するステップと、
複数の空隙に光学機能性UV硬化液体ポリマー(例えばアクリル化ポリエステル)を充填し、ニップローラで加圧して過剰の液体ポリマーを除去し、同時にUV硬化ポリマーをキュアすなわち硬化させてレンズモールドから持ち上げられるように液体ポリマーをUV放射に曝すステップと、
硬化性樹脂材料を剥離ライナー(例えば機能性剥離コーティングを有する平滑すなわち構造のないキャリア基板)の表面に被覆し、その表面を固体アイコンモールドに押し付けて硬化させて硬化性樹脂材料表面内に空隙の形で画像アイコンの一つ又は複数の配列を形成するステップと、
空隙に硬化性樹脂材料とのコントラストを与える材料を充填して、充填画像アイコン層を形成するステップと、
一つ又は複数の接着層(例えばタックフリー熱活性化接着剤層)を転写可能層に被覆するステップと、が含まれる。
(A)各レンズ配列が次のa〜cの内の一つ又は複数を有する、基板の各側の非埋設型すなわち開放型のレンズ配列(図4a参照)の使用。
a.異なる回転角(好ましくはモアレ効果を最小化するように設計された回転角)(すなわち、他方のレンズ配列の回転角とは異なる回転角)を有するレンズ配列。典型的には、1〜2度又はもう少し大きな角度でいかなるモアレ効果も十分に縮小されて、レンズ上に見えるモアレ効果のサイズは所望の合成画像に比べて非常に小さくなる。必要があれば角度はさらに調節可能である。ただし、角度をあまり大きくすると新規のモアレ画像が発生する。
b.異なる格子構造又はレンズパターン(例えば、円形、三角形、正方形、又は六角形のレンズアレイパターン)(すなわち、他方のレンズ配列の格子構造とは異なる格子構造)。例えば配列28の頂部レンズは六角形グリッド上に配置され、配列32の底部レンズは長方形又は正方形グリッド上に配置されるというようにする。
c.異なるピッチ(すなわち他方のレンズ配列のピッチとは異なるピッチ)。
(B)各レンズ配列が次のa〜cの内の一つ又は複数を有する、基板の各側の埋設型すなわち封止型のレンズ配列(図4a参照)の使用。
a.異なる回転角(好ましくはモアレ効果を最小化するように設計された回転角)(すなわち、他方のレンズ配列の回転角とは異なる回転角)を有するレンズ配列。典型的には、1〜2度又はもう少し大きな角度でいかなるモアレ効果も十分に縮小されて、レンズ上に見えるモアレ効果のサイズは所望の合成画像に比べて非常に小さくなる。必要があれば角度はさらに調節可能である。ただし、角度をあまり大きくすると新規のモアレ画像が発生する。
b.異なる格子構造又はレンズパターン(例えば、円形、三角形、正方形、又は六角形のレンズアレイパターン)(すなわち、他方のレンズ配列の格子構造とは異なる格子構造)。例えば配列28の頂部レンズは六角形グリッド上に配置され、配列32の底部レンズは長方形又は正方形グリッド上に配置されるというようにする。
c.異なるピッチ(すなわち他方のレンズ配列のピッチとは異なるピッチ)。
硬化性樹脂材料を剥離ライナー(例えば機能性剥離コーティングを有する平滑すなわち構造のないキャリア基板)の表面に被覆し、その表面を固体アイコンモールドに押し付けて硬化させて硬化性樹脂材料表面内の空隙の形で画像アイコンの一つ又は複数の配列を形成するステップと、
空隙に硬化性樹脂材料とのコントラストを与える材料を充填して、充填画像アイコン層を形成するステップと、
硬化性樹脂材料を充填された画像アイコン層表面に被覆し、その樹脂をネガ型のレンズ形状(すなわちネガ型レンズモールド)を有する固体表面に押し付けて硬化させて硬化性樹脂材料表面上に一つ又は複数の集光要素の配列を形成するステップと、
集光要素に金属又は他の反射材料のコンフォーマルコーティングを被覆して、反射集光要素の一つ又は複数の配列を形成するステップと、
一つ又は複数の反射集光要素の配列に一つ又は複数の保護コーティング層を任意選択で被覆するステップと、
その任意選択で保護コーティングされた一つ又は複数の反射集光要素の配列に対して一つ又は複数の接着剤層(例えばタックフリー熱活性化接着剤層)を被覆するステップと、を含む。
Claims (5)
- 約60μm以上の厚さを有するポリマー又はポリマー基板(12)と、一つ又は複数の合成画像を投影する集積された一つ又は複数の光学セキュリティデバイスとで構成され、前記一つ又は複数の光学セキュリティデバイスは前記基板(12)の全部または一部に集積された改良ポリマーシート材料(10)であって、
前記一つ又は複数の集積光学セキュリティデバイスは、前記基板上の一つ又は複数の透明窓と一つ又は複数の不透明領域とに整列され、前記基板の上側表面上の第1の画像アイコン配列の下に位置する、薄く金属被覆された屈折/反射混合型集光要素(52)の配列と、前記基板の下側表面上で前記第1の画像アイコン配列と前記薄く金属被覆された屈折/反射混合型集光要素配列(52)の直下に位置する第2の画像アイコン配列と、で構成され、
一つ又は複数の不透明領域は前記第2の画像アイコン上に配置され、
反射光及び透過光のもとで前記改良ポリマーシート材料によって一つ又は複数の合成画像が投影され、
前記一つ又は複数の不透明領域は反射光像を可能とし、
前記一つ又は複数の透明窓は、反射光像に勝る透過光像を可能とする、
改良ポリマーシート材料。 - 前記一つ又は複数の集積光学セキュリティデバイスは、前記基板(12)の一部のみに位置し、前記基板(12)の残部は、不透明化コーティングを用いて覆われている
請求項1に記載の改良ポリマーシート材料。 - 前記画像アイコンは、周囲又は下層の材料とは屈折率の異なる材料、染色された材料、金属、又は色素物質によって充填又はコーティングされた、前記基板(12)上又は基板(12)内の空隙又は凹部で形成され、
前記空隙又は凹部のそれぞれは、全深さが約0.5μmから約8μmであって、全幅が約0.5μm以上であり、
前記ポリマー又はポリマー基板は光学スペーサとして機能する、
請求項1に記載の改良ポリマーシート材料。 - 請求項3に記載の改良ポリマーシート材料を形成する方法であって、
剥離ライナーの表面に硬化性樹脂材料を塗布し、前記表面を固体アイコンモールドに押し付けて硬化させて前記硬化性樹脂材料の表面内の空隙の形で画像アイコンの一つ又は複数の配列を形成するステップと、
前記空隙に前記硬化性樹脂材料とのコントラストを与える材料を充填して、充填画像アイコン層を形成するステップと、
前記充填画像アイコン層に硬化性樹脂材料を塗布してネガ型レンズ形状をした固体表面に押し付けて硬化させて前記硬化性樹脂材料の表面に集光要素の一または複数の配列を形成するステップと、
集光要素に金属又は他の反射材料のコンフォーマルコーティングを被覆して、反射集光要素の一つ又は複数の配列を形成するステップと、
前記反射集光要素の一または複数の配列に一又は複数の接着層を塗布するステップであって、前記ステップにおいては、得られたフィルム様構造体は、ポリマー又はポリマー基板(12)に接触され、且つ熱及び圧力を加えることにより剥離ライナーは完全に剥離され、前記基板(12)の一方の面に転写された製品が残存して前記基板(12)が請求項1または3に記載の画像アイコンと集光要素と透明窓と不透明領域とを有するステップと、
を有する請求項3に記載の改良ポリマーシート材料を形成する方法。 - 請求項1に記載の改良ポリマーシート材料(10)を用いて作製されたポリマーセキュリティ文書。
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