JP2021011067A - Forgery prevention medium - Google Patents
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- JP2021011067A JP2021011067A JP2019126075A JP2019126075A JP2021011067A JP 2021011067 A JP2021011067 A JP 2021011067A JP 2019126075 A JP2019126075 A JP 2019126075A JP 2019126075 A JP2019126075 A JP 2019126075A JP 2021011067 A JP2021011067 A JP 2021011067A
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- 230000002265 prevention Effects 0.000 title abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 16
- 239000010410 layer Substances 0.000 claims description 60
- 238000010438 heat treatment Methods 0.000 claims description 15
- 239000002346 layers by function Substances 0.000 claims description 5
- 239000000976 ink Substances 0.000 description 126
- 238000000034 method Methods 0.000 description 12
- 238000007639 printing Methods 0.000 description 5
- 239000011800 void material Substances 0.000 description 5
- 230000002427 irreversible effect Effects 0.000 description 4
- 239000012790 adhesive layer Substances 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 235000012745 brilliant blue FCF Nutrition 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 125000005587 carbonate group Chemical group 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- MUBZPKHOEPUJKR-UHFFFAOYSA-N oxalic acid group Chemical group C(C(=O)O)(=O)O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Abstract
Description
本発明は、再利用防止機能を備えた偽造防止媒体に関する。 The present invention relates to an anti-counterfeit medium having a reuse prevention function.
物品が偽造されることを防止する方法として、偽造防止媒体を物品に貼付する方法がある。偽造防止媒体としては、偽造防止用機能性インキ、特殊印刷、ホログラム、磁気印刷、ＩＣタグなどを使用した偽造防止ラベルの形態をとることが多い。 As a method of preventing the article from being forged, there is a method of attaching an anti-counterfeit medium to the article. The anti-counterfeit medium often takes the form of an anti-counterfeit label using anti-counterfeit functional ink, special printing, hologram, magnetic printing, IC tag and the like.
しかしながら、偽造防止ラベルが物品に貼付されていたとしても、偽造防止ラベルを真正品から剥がし取り、偽造品に貼り付けると言った不正行為が後を絶たない。 However, even if the anti-counterfeit label is affixed to the article, there is no end to fraudulent acts such as peeling the anti-counterfeit label from the genuine product and attaching it to the counterfeit product.
この様な偽造防止ラベルの不正な再利用を防止する方法としては、以下に挙げる様なものがある。
・ 偽造防止ラベルに切り欠きを設け、無理に剥がそうとすると、切り欠きがきっかけとなって偽造防止ラベルが破損してしまう方法。
・ 偽造防止ラベルの基材を脆性材料にする方法。
・ 偽造防止ラベルを剥がそうとすると表面の基材に“ＶＯＩＤ”などの文字が現れ、物品にインキが付着するタイプの偽造防止ラベルを使用する方法。
・ 有機溶剤溶解染料が含有されていて、ラベル剥がしなど剥離液で剥がそうとした時、前記の染料が印刷部より滲み出すことで不正な再利用を防止する方法。
As a method of preventing such unauthorized reuse of the anti-counterfeit label, there are the following methods.
-A method in which the anti-counterfeit label is damaged if a notch is provided in the anti-counterfeit label and an attempt is made to peel it off forcibly.
-A method of making the base material of the anti-counterfeit label a brittle material.
-A method of using an anti-counterfeit label of the type in which characters such as "VOID" appear on the surface base material when an attempt is made to remove the anti-counterfeit label, and ink adheres to the article.
-A method of preventing unauthorized reuse by containing an organic solvent-dissolving dye and trying to peel it off with a peeling liquid such as label peeling, because the dye oozes out from the printed part.
しかしながら、これらの方法ではドライヤーなどの加熱手段を用いて偽造防止ラベルを加熱することにより、きれいに剥がし取り、再利用する事が可能である。 However, in these methods, the anti-counterfeit label can be peeled off cleanly and reused by heating the anti-counterfeit label using a heating means such as a dryer.
この様な加熱手段を用いた不正な再利用を防止する先行技術としては、例えば、偽造防止ラベルの粘着層中に発泡粒子を含有させることで、ドライヤー等でラベルを加熱した場合、粘着層中の発泡粒子が発泡することで、再利用を防止する方法（特許文献１）や、ラベルの粘着剤を、溶剤などに溶解しない難溶性にすることで再利用を防止する方法（特許文献２）が開示されている。 As a prior technique for preventing unauthorized reuse using such a heating means, for example, when the label is heated by a dryer or the like by containing foamed particles in the adhesive layer of the anti-counterfeit label, the adhesive layer is contained. A method of preventing reuse by foaming the foamed particles of the label (Patent Document 1) and a method of preventing reuse by making the label adhesive hardly soluble in a solvent or the like (Patent Document 2). Is disclosed.
しかしながら、これらの方策を施した場合であっても、偽造防止ラベルを貼付した物品の表層ごと削ぎ落すことで、偽造防止ラベルに損傷を与えずに再利用が可能となる。 However, even when these measures are taken, the anti-counterfeit label can be reused without being damaged by scraping off the entire surface layer of the article to which the anti-counterfeit label is attached.
その対策として、温度変化によって可逆的に色変化するインキ層を設けた偽造防止媒体（特許文献３）が開示されている。
この技術は、ラベルを７０℃以上で加熱すると真正性を示す表示が消失し、−２０℃以下に冷却すると、消失した表示が復元されると同時に、潜像として印刷してあった透明状態のインキが発色し、ＶＯＩＤ（無効）という意味の表示が現れることで、再利用防止策となる。
As a countermeasure, an anti-counterfeit medium (Patent Document 3) provided with an ink layer that reversibly changes color with a temperature change is disclosed.
With this technology, when the label is heated above 70 ° C, the display indicating authenticity disappears, and when it is cooled below -20 ° C, the disappeared display is restored, and at the same time, the transparent state printed as a latent image is restored. When the ink develops color and a display meaning VOID (invalid) appears, it becomes a measure to prevent reuse.
しかしながら、この様な特性を備えた示温インキの種類が少ない為、バリエーションに乏しい問題があった。 However, since there are few types of temperature-indicating inks having such characteristics, there is a problem that there are few variations.
上記の事情に鑑み、本発明は、常温以上の温度で色変化するインキ層を用いることにより、加熱されたことを検知可能な偽造防止媒体において、色の種類や色変化する温度の選択肢がより多い偽造防止媒体を提供することを課題とする。 In view of the above circumstances, the present invention provides more options for the type of color and the temperature at which the color changes in the anti-counterfeit medium that can detect that the product has been heated by using an ink layer that changes color at a temperature above room temperature. The challenge is to provide a large number of anti-counterfeit media.
上記の課題を解決する手段として、本発明の請求項１に記載の発明は、基材上にコピーによる偽造を防止する偽造防止機能層と、加熱された事を検知可能な感熱インキ層および感熱インキ層の一部を隠蔽する隠蔽インキ層と、をこの順に備えた偽造防止媒体であって、
感熱インキ層は、少なくとも、常温では透明であり、加熱されると不可逆的に発色する感熱インキ（Ａ）と、常温では隠蔽インキ層と同色であり、加熱されると消色する感熱インキ（Ｂ）と、を備えており、
隠蔽インキ層は、平面視で、感熱インキ（Ａ）の一部および感熱インキ（Ｂ）と重なって備えられていることを特徴とする偽造防止媒体である。
As a means for solving the above problems, the invention according to claim 1 of the present invention includes an anti-counterfeit functional layer for preventing counterfeiting by copying on a substrate, a heat-sensitive ink layer capable of detecting heating, and heat-sensitive. An anti-counterfeit medium provided with a concealing ink layer that conceals a part of the ink layer in this order.
The heat-sensitive ink layer is at least transparent at room temperature and irreversibly develops color when heated, and the heat-sensitive ink (B) which has the same color as the concealing ink layer at room temperature and disappears when heated. ) And,
The concealing ink layer is an anti-counterfeit medium, which is provided so as to overlap with a part of the heat-sensitive ink (A) and the heat-sensitive ink (B) in a plan view.
また、請求項２に記載の発明は、前記感熱インキ（Ａ）の一部および前記感熱インキ（Ｂ）と、前記隠蔽インキ層とは、毛抜き合わせに備えられていることを特徴とする請求項１に記載の偽造防止媒体である。 The invention according to claim 2 is characterized in that a part of the heat-sensitive ink (A), the heat-sensitive ink (B), and the concealing ink layer are provided for hair removal. The anti-counterfeit medium according to 1.
また、請求項３に記載の発明は、前記感熱インキ（Ａ）の一部が前記隠蔽インキ層の上に備えられており、前記感熱インキ（Ｂ）は前記隠蔽インキ層と毛抜き合わせに備えられていることを特徴とする請求項１に記載の偽造防止媒体である。 Further, in the invention according to claim 3, a part of the heat-sensitive ink (A) is provided on the concealing ink layer, and the heat-sensitive ink (B) is provided for hair removal with the concealing ink layer. The anti-counterfeit medium according to claim 1, characterized in that the ink is used.
本発明の偽造防止媒体によれば、常温では透明であり、加熱された事を検知可能な感熱インキ層および感熱インキ層の一部を隠蔽する隠蔽インキ層を備えている。その感熱インキ層は、常温では透明であり、加熱されると不可逆的に発色する感熱インキ層Ａと、常温では隠蔽インキ層と同色で、加熱されると消色する感熱インキ層Ｂと、備えている。その為、物品に貼付された偽造防止媒体を常温より高温に加熱すると、透明だった感熱インキＡが発色し、隠蔽インキ層と同じ色だった感熱インキＢが消色する。その為、感熱インキＡによる像が現れる。また、毛抜き合わせに備えられている感熱インキＢが消色することにより像が現れる。この様に、本発明の偽造防止媒体においては、加熱で不可逆的に発色する感熱インキと、消色する感熱インキを使用している為、１種の感熱インキを使用する場合と比較して、使用可能な色の範囲を広げることが可能であり、優れた意匠性を備えた偽造防止媒体を提供可能である。 According to the anti-counterfeit medium of the present invention, the anti-counterfeit medium is transparent at room temperature, and includes a heat-sensitive ink layer capable of detecting that it has been heated and a concealing ink layer that hides a part of the heat-sensitive ink layer. The heat-sensitive ink layer includes a heat-sensitive ink layer A that is transparent at room temperature and irreversibly develops color when heated, and a heat-sensitive ink layer B that has the same color as the concealing ink layer at room temperature and disappears when heated. ing. Therefore, when the anti-counterfeit medium attached to the article is heated to a temperature higher than room temperature, the transparent heat-sensitive ink A develops a color, and the heat-sensitive ink B, which has the same color as the concealing ink layer, disappears. Therefore, an image of the thermal ink A appears. Further, an image appears when the heat-sensitive ink B provided for hair removal is decolorized. As described above, in the anti-counterfeit medium of the present invention, since the heat-sensitive ink that irreversibly develops color by heating and the heat-sensitive ink that decolorizes are used, as compared with the case where one kind of heat-sensitive ink is used, It is possible to expand the range of colors that can be used, and it is possible to provide an anti-counterfeit medium having excellent design.
本発明の偽造防止媒体を図１および図２を用いて説明する。
図１は、本発明の偽造防止媒体１０、２０を平面視した説明図である。図１（ａ）は感熱インキ（Ａ）１と感熱インキ（Ｂ）２が、それぞれ発色および消色する前の状態を示している。“ＶＯＩＤ”および“ＩＤ”という文字が隠蔽インキ層４と一部が重なって形成されている。見かけ上は、図１（ｃ）の様に、ホログラムやパール加工による偽造防止層
３の上に隠蔽インキ層３が見えているのみである。図１（ｂ）は、感熱インキ（Ａ）１と感熱インキ（Ｂ）２が、それぞれ発色および消色した後の状態を示しており、“ＶＯＩＤ”および“ＩＤ”という文字が浮かび上がっている。
The anti-counterfeit medium of the present invention will be described with reference to FIGS. 1 and 2.
FIG. 1 is an explanatory view of the anti-counterfeit media 10 and 20 of the present invention in a plan view. FIG. 1A shows the states of the thermal ink (A) 1 and the thermal ink (B) 2 before they are colored and decolorized, respectively. The characters "VOID" and "ID" are formed so as to partially overlap with the concealing ink layer 4. Apparently, as shown in FIG. 1C, only the concealing ink layer 3 is visible on the anti-counterfeiting layer 3 produced by hologram or pearl processing. FIG. 1B shows the state after the thermal ink (A) 1 and the thermal ink (B) 2 have been colored and decolorized, respectively, and the characters “VOID” and “ID” have emerged. ..
図２は、本発明の偽造防止媒体１０、２０の断面を示した説明図である。図２（ａ）は、図１（ａ）の感熱インキ（Ａ）１と隠蔽インキ層４の断面を例示した説明図である。また、図２（ｂ）は、図１（ａ）の感熱インキ（Ｂ）２と隠蔽インキ層４の断面を例示した説明図である。図２（ａ）と（ｂ）は、感熱インキ（Ａ）および感熱インキ（Ｂ）が、隠蔽インキ層４と毛抜き合わせに形成された場合を例示したものである。図２（ｃ）は、感熱インキ（Ａ）が隠蔽インキ層４の上に形成された場合を例示したものである。 FIG. 2 is an explanatory view showing a cross section of the anti-counterfeit media 10 and 20 of the present invention. FIG. 2A is an explanatory view illustrating a cross section of the thermal ink (A) 1 and the concealing ink layer 4 of FIG. 1A. Further, FIG. 2B is an explanatory view illustrating a cross section of the thermal ink (B) 2 and the concealing ink layer 4 of FIG. 1A. FIGS. 2A and 2B exemplify a case where the thermal ink (A) and the thermal ink (B) are formed in tweezers with the concealing ink layer 4. FIG. 2C illustrates a case where the thermal ink (A) is formed on the concealing ink layer 4.
本発明の偽造防止媒体１０は、基材上５にコピーによる偽造を防止する偽造防止機能層３と、加熱された事を検知可能な感熱インキ層および感熱インキ層の一部を隠蔽する隠蔽インキ層４と、をこの順に備えた偽造防止媒体である。 The anti-counterfeit medium 10 of the present invention has an anti-counterfeit functional layer 3 on a base material 5 that prevents counterfeiting due to copying, a heat-sensitive ink layer that can detect that it has been heated, and a concealing ink that conceals a part of the heat-sensitive ink layer. It is an anti-counterfeit medium provided with layers 4 in this order.
感熱インキ層は、少なくとも、常温では透明であり、常温以上に加熱されると不可逆的に発色する感熱インキ（Ａ）１と、常温では隠蔽インキ層４と同色であり、加熱されると消色する感熱インキ（Ｂ）２と、備えている。いずれも市販されている感熱インキを使用可能である。 The heat-sensitive ink layer is transparent at least at room temperature and has the same color as the heat-sensitive ink (A) 1 which is irreversibly colored when heated above room temperature and the concealing ink layer 4 at room temperature, and is decolorized when heated. It is equipped with the heat-sensitive ink (B) 2. In either case, commercially available thermal ink can be used.
隠蔽インキ層４は、平面視で、感熱インキ（Ａ）１の一部および感熱インキ（Ｂ）２と重なって備えられていることが特徴である。 The concealing ink layer 4 is characterized in that it is provided so as to overlap with a part of the thermal ink (A) 1 and the thermal ink (B) 2 in a plan view.
また、感熱インキ（Ａ）１の一部および感熱インキ（Ｂ）２と、隠蔽インキ層４とは、毛抜き合わせに備えられていても良い。 Further, a part of the heat-sensitive ink (A) 1, the heat-sensitive ink (B) 2, and the concealing ink layer 4 may be provided for hair removal.
また、感熱インキ（Ａ）１の一部が隠蔽インキ層４の上に備えられており、感熱インキ（Ｂ）２は隠蔽インキ層４と毛抜き合わせに備えられていても良い。 Further, a part of the heat-sensitive ink (A) 1 may be provided on the concealing ink layer 4, and the heat-sensitive ink (B) 2 may be provided for tweezers with the concealing ink layer 4.
（基材）
基材５としては、上質紙やコート紙やＰＥＴシートなどを想定する事が出来るが、印刷が可能なものであればどのようなものでもかまわない。ただし、本発明の偽造防止媒体１０、２０は加熱によって再利用防止機能を発現させる場合もあるため、感熱インキ層が変色する程度の加熱では変形しないような基材が望ましい。
(Base material)
As the base material 5, high-quality paper, coated paper, PET sheet, or the like can be assumed, but any printable material may be used. However, since the anti-counterfeit media 10 and 20 of the present invention may exhibit the reuse prevention function by heating, it is desirable that the base material is not deformed by heating to the extent that the heat-sensitive ink layer is discolored.
（偽造防止機能層）
偽造防止機能層３としては、各種偽造防止媒体を使用することが出来る。たとえばパールインキなど特殊な見た目を示すインキや、ＵＶライト等で発光する蛍光インキに代表されるようなＯＶＩ（ＯＰＴＩＣＡＬ ＶＡＲＩＡＢＬＥ ＩＮＫ）やホログラムに代表されるＯＶＤ（ＯＰＴＩＣＡＬ ＶＡＲＩＡＢＬＥ ＤＥＶＩＣＥ）などである。機械検知用の偽造防止機能層としては、特定の波長の赤外線を吸収するインキなどを使用することができる。また細紋印刷や、マイクロ文字、凹版印刷など、印刷方式による偽造防止機能もあわせて使用可能である。また偽造防止機能層は１種類に限るものではなく、複数組み合わせたり、多層構成になっていてもかまわないし、基材の全面を覆う必要も無く、部分的に設けられていたり、層構成の順番が異なっていてもかまわない。
(Forgery prevention function layer)
As the anti-counterfeit functional layer 3, various anti-counterfeit media can be used. For example, there are inks having a special appearance such as pearl ink, OVI (OPTICAL VARIABLE INK) represented by fluorescent inks that emit light by UV light, and OVD (OPTICAL VARIABLE DEVICE) represented by holograms. As the anti-counterfeiting functional layer for machine detection, ink or the like that absorbs infrared rays of a specific wavelength can be used. In addition, anti-counterfeiting functions such as fine pattern printing, microprinting, and intaglio printing can also be used. Further, the anti-counterfeit function layer is not limited to one type, and may be combined or formed in multiple layers, and it is not necessary to cover the entire surface of the base material, and the layers may be partially provided or in the order of the layer structure. Can be different.
（隠蔽インキ層）
本発明の偽造防止媒体１０、２０で使用する隠蔽インキ層４としては、カーボンブラック等を含まない混色の墨インキや、濃色のインキなどを好適に使用することができる。
(Concealed ink layer)
As the concealing ink layer 4 used in the anti-counterfeit media 10 and 20 of the present invention, a mixed color ink that does not contain carbon black or the like, a dark ink, or the like can be preferably used.
（感熱インキ（Ａ））
加熱によって不可逆的な色変化を起こす感熱インキ（Ａ）１としては、コバルト、ニッケル、鉄、銅、クロム、マンガンなどの塩類と、これらの組成中にアミン、アンモニウム塩、炭酸基、しゅう酸基などを含む顔料を使用した不可逆性示温材料を顔料として作製したインキを使用することができる。
(Thermal ink (A))
The heat-sensitive ink (A) 1 that causes an irreversible color change by heating includes salts such as cobalt, nickel, iron, copper, chromium, and manganese, and amine, ammonium salt, carbonate group, and oxalic acid group in these compositions. An ink prepared by using an irreversible temperature indicating material using a pigment containing the above as a pigment can be used.
（感熱インキ（Ｂ））
加熱によって可逆的な色変化を起こす感熱インキ（Ｂ）２としては、すでに様々な材料が開発されて公知となっている。最も広く知られているのはロイコ染料と呈色剤を混合したもので、一定温度以上になると染料と呈色剤が結びついて発色するものである。消色に関しては単に温度を下げるだけで消える場合や、適切な温度で一定時間加熱することにより消える場合など各種方式がある。また最近では市販のボールペンなどでも加熱によって消色させることができるフリクションインキ（（株）パイロットコーポレーションの登録商標）を使用したものがあり、このようなタイプのインキも同様にロイコ染料を応用したもので、本発明において使用することができる。また、このような可逆的に色変化するインキは赤外域での吸収がないものが多いが、赤外域にも吸収がある材料も開発されており、利用することができる。
(Thermal ink (B))
Various materials have already been developed and are known as the heat-sensitive ink (B) 2 that causes a reversible color change by heating. The most widely known is a mixture of a leuco dye and a color-developing agent, and when the temperature exceeds a certain level, the dye and the color-developing agent combine to develop a color. Regarding decolorization, there are various methods such as a case where the color disappears by simply lowering the temperature, and a case where the color disappears by heating at an appropriate temperature for a certain period of time. Recently, there are some commercially available ballpoint pens that use friction ink (a registered trademark of Pilot Corporation) that can be decolorized by heating, and these types of ink also apply leuco dye. It can be used in the present invention. In addition, many of these reversibly color-changing inks do not absorb in the infrared region, but materials that also absorb in the infrared region have been developed and can be used.
次に、本発明の偽造防止媒体の実施例について説明する。 Next, examples of the anti-counterfeit medium of the present invention will be described.
＜実施例１＞
基材として、厚さ５０μｍのＰＥＴ（ポリエチレンテレフタレート）フィルムを用意した。
<Example 1>
As a base material, a PET (polyethylene terephthalate) film having a thickness of 50 μm was prepared.
次に、このＰＥＴフィルムの片面にエンボスホログラムシートを、接着剤層を介して貼り合わせた。 Next, an embossed hologram sheet was attached to one side of the PET film via an adhesive layer.
次に、不可逆的感熱インキとして、８０℃に加熱することで、無色から不可逆的に発色する感熱性インキ（感熱インキ（Ａ））としてサーマフレックスシリーズ（長瀬産業（株）製）のＢＬＵＥ１を使用し、可逆的感熱インキ（感熱インキ（Ｂ））として、ロイコ染料を使用した感熱インキ（メタモカラー、パイロットインキ（株）製）を使用して、エンボスホログラムシートの上に、それぞれ図１（ａ）に示した様な感熱インキ（Ａ）１と感熱インキ（Ｂ）２のインキパターンを印刷した。感熱インキ（Ａ）は、加熱前は透明であるが、８０℃以上に加熱すると発色する。感熱インキ（Ｂ）は、加熱前は色がついているが、８０℃以上に加熱すると消色する。 Next, as an irreversible heat-sensitive ink, BLUE1 of Thermaflex series (manufactured by Nagase Sangyo Co., Ltd.) is used as a heat-sensitive ink (heat-sensitive ink (A)) that develops irreversible color from colorless when heated to 80 ° C. Then, as a reversible heat-sensitive ink (heat-sensitive ink (B)), a heat-sensitive ink using leuco dye (Metamocolor, manufactured by Pilot Ink Co., Ltd.) was used, and FIG. The ink patterns of the heat-sensitive ink (A) 1 and the heat-sensitive ink (B) 2 as shown in) were printed. The thermal ink (A) is transparent before heating, but develops color when heated to 80 ° C. or higher. The heat-sensitive ink (B) is colored before heating, but disappears when heated to 80 ° C. or higher.
次に、図１（ａ）に示した様に、感熱インキ（Ａ）１のパターンの一部と毛抜き合わせにして隠蔽インキ層４を印刷し、乾燥した。同様に、感熱インキ（Ｂ）２のパターンと毛抜き合わせにして隠蔽インキ層４を印刷し、乾燥した。隠蔽インキとしては、感熱インキ（Ｂ）２と色合わせをしたインキを使用した。印刷には、平版オフセット印刷を使用した。 Next, as shown in FIG. 1A, the concealing ink layer 4 was printed by removing hair from a part of the pattern of the thermal ink (A) 1 and dried. Similarly, the concealing ink layer 4 was printed by tweezers with the pattern of the thermal ink (B) 2 and dried. As the concealing ink, an ink color-matched with the thermal ink (B) 2 was used. Planographic offset printing was used for printing.
この様にして作製した印刷物は、図１（ｃ）に示した様に、偽造防止機能層（ホログラムシート）３上に隠蔽インキ層４しか視認することができなかった。感熱インキ（Ａ）１は無色透明であるためであり、また、感熱インキ（Ｂ）２は、隠蔽インキ層４と毛抜き合わせに印刷されていて、両者は同色であるため、視認することができなかった。しかしながら、オーブンに入れ、８０℃に加熱すると、図１（ｂ）に示した様に、感熱インキ（Ａ）１が発色し、“ＶＯＩＤ”というパターンが現れた。また、感熱インキ（Ｂ）２は消色するため、隠蔽インキ層４が色抜けした形で“ＩＤ”というパターンが現れた。 In the printed matter produced in this manner, as shown in FIG. 1 (c), only the concealing ink layer 4 could be visually recognized on the anti-counterfeit function layer (hologram sheet) 3. This is because the heat-sensitive ink (A) 1 is colorless and transparent, and the heat-sensitive ink (B) 2 is printed on the concealing ink layer 4 and the tweezers, and both are the same color, so that they can be visually recognized. There wasn't. However, when the ink was placed in an oven and heated to 80 ° C., the thermal ink (A) 1 developed a color and a pattern of "VOID" appeared as shown in FIG. 1 (b). Further, since the heat-sensitive ink (B) 2 is decolorized, a pattern called "ID" appears in a form in which the concealing ink layer 4 is out of color.
以上の様にして、本発明の偽造防止媒体は、常温では視認できなかったパターンが、８０℃に加熱する事によって視認可能なパターンとして浮かび上がる偽造防止媒体を得ることができた。 As described above, as the anti-counterfeit medium of the present invention, it was possible to obtain an anti-counterfeit medium in which a pattern that could not be visually recognized at room temperature emerges as a visible pattern by heating to 80 ° C.
以上、本発明の偽造防止媒体について説明した。本発明の偽造防止媒体においては、感熱インキとして、常温では透明で、加熱すると不可逆的に発色する感熱インキと、常温では隠蔽インキ層と同色であり、加熱すると消色するインキを使用して、いずれも加熱された事を検知可能とするものである。この様に２種類の感熱インキを使用している為、色のバリエーションが広がる。特に、消色インキとしては、色のバリエーションが広いため、意匠性が高い偽造防止媒体を提供可能である。また、２種類の感熱インキを使用することにより、色変化を起こす温度領域の幅も広げることが可能となる。 The anti-counterfeit medium of the present invention has been described above. In the anti-counterfeit medium of the present invention, as the heat-sensitive ink, a heat-sensitive ink that is transparent at room temperature and irreversibly develops color when heated and an ink that has the same color as the concealing ink layer at room temperature and disappears when heated are used. In each case, it is possible to detect that the ink has been heated. Since two types of heat-sensitive inks are used in this way, color variations are widened. In particular, as the decolorizing ink, since there are a wide variety of colors, it is possible to provide an anti-counterfeit medium with high design. Further, by using two kinds of heat-sensitive inks, it is possible to widen the width of the temperature range in which the color changes.
１・・・感熱インキ（Ａ）
２・・・感熱インキ（Ｂ）
３・・・偽造防止機能層
４・・・隠蔽インキ層
５・・・基材
１０、２０・・・偽造防止媒体
1 ... Thermal ink (A)
2 ... Thermal ink (B)
3 ... Anti-counterfeit function layer 4 ... Concealment ink layer 5 ... Base materials 10, 20 ... Anti-counterfeit medium
Claims (3)
感熱インキ層は、少なくとも、常温では透明であり、加熱されると不可逆的に発色する感熱インキ（Ａ）と、常温では隠蔽インキ層と同色であり、加熱されると消色する感熱インキ（Ｂ）と、を備えており、
隠蔽インキ層は、平面視で、感熱インキ（Ａ）の一部および感熱インキ（Ｂ）と重なって備えられていることを特徴とする偽造防止媒体。 An anti-counterfeiting functional layer for preventing counterfeiting due to copying, a heat-sensitive ink layer capable of detecting heating, and a concealing ink layer for concealing a part of the heat-sensitive ink layer are provided on the base material in this order. It ’s a medium,
The heat-sensitive ink layer is at least transparent at room temperature and irreversibly develops color when heated, and the heat-sensitive ink (B) which has the same color as the concealing ink layer at room temperature and disappears when heated. ) And,
The concealing ink layer is an anti-counterfeit medium, which is provided so as to overlap with a part of the heat-sensitive ink (A) and the heat-sensitive ink (B) in a plan view.
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