JPH10251999A - Paper for preventing forgery - Google Patents
Paper for preventing forgeryInfo
- Publication number
- JPH10251999A JPH10251999A JP5490397A JP5490397A JPH10251999A JP H10251999 A JPH10251999 A JP H10251999A JP 5490397 A JP5490397 A JP 5490397A JP 5490397 A JP5490397 A JP 5490397A JP H10251999 A JPH10251999 A JP H10251999A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- paper
- thread
- thermochromic
- concealed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000000758 substrate Substances 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 230000002265 prevention Effects 0.000 claims description 8
- 238000002845 discoloration Methods 0.000 claims description 3
- 238000007639 printing Methods 0.000 abstract description 11
- 239000004372 Polyvinyl alcohol Substances 0.000 abstract description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 abstract description 5
- 238000010030 laminating Methods 0.000 abstract description 2
- 239000003232 water-soluble binding agent Substances 0.000 abstract description 2
- 230000001747 exhibiting effect Effects 0.000 abstract 2
- 229920006267 polyester film Polymers 0.000 abstract 1
- 239000013055 pulp slurry Substances 0.000 abstract 1
- 239000002002 slurry Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 67
- 238000000034 method Methods 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 12
- 239000011888 foil Substances 0.000 description 9
- 239000011230 binding agent Substances 0.000 description 7
- 239000000835 fiber Substances 0.000 description 6
- 239000002932 luster Substances 0.000 description 5
- -1 polyethylene terephthalate Polymers 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 239000012209 synthetic fiber Substances 0.000 description 4
- 229920002994 synthetic fiber Polymers 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000007756 gravure coating Methods 0.000 description 2
- 238000007646 gravure printing Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920000058 polyacrylate Polymers 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 239000011122 softwood Substances 0.000 description 2
- KKIJZWOPMWEAIV-UHFFFAOYSA-N 2,2-dimethylpropyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(C)(C)C KKIJZWOPMWEAIV-UHFFFAOYSA-N 0.000 description 1
- YAXXOCZAXKLLCV-UHFFFAOYSA-N 3-dodecyloxolane-2,5-dione Chemical class CCCCCCCCCCCCC1CC(=O)OC1=O YAXXOCZAXKLLCV-UHFFFAOYSA-N 0.000 description 1
- RCVMSMLWRJESQC-UHFFFAOYSA-N 7-[4-(diethylamino)-2-ethoxyphenyl]-7-(1-ethyl-2-methylindol-3-yl)furo[3,4-b]pyridin-5-one Chemical compound CCOC1=CC(N(CC)CC)=CC=C1C1(C=2C3=CC=CC=C3N(CC)C=2C)C2=NC=CC=C2C(=O)O1 RCVMSMLWRJESQC-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 241000609240 Ambelania acida Species 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 240000000797 Hibiscus cannabinus Species 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 240000006240 Linum usitatissimum Species 0.000 description 1
- 235000004431 Linum usitatissimum Nutrition 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 229920000881 Modified starch Polymers 0.000 description 1
- 239000004368 Modified starch Substances 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 229920002873 Polyethylenimine Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical compound O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 240000004308 marijuana Species 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 239000003094 microcapsule Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000019426 modified starch Nutrition 0.000 description 1
- WVJVHUWVQNLPCR-UHFFFAOYSA-N octadecanoyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC(=O)CCCCCCCCCCCCCCCCC WVJVHUWVQNLPCR-UHFFFAOYSA-N 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000013054 paper strength agent Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- ODGAOXROABLFNM-UHFFFAOYSA-N polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Landscapes
- Credit Cards Or The Like (AREA)
- Paper (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、紙幣、株券、債
券、商品券、宝くじ等の有価証券類の偽造防止に関する
もので、さらに詳しくは、電子複写機やカラースキャナ
ー、印刷機等を利用して偽造や改竄をしようとしたとき
にそれらの行為が極めて困難であるようにした偽造防止
用紙に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the prevention of counterfeiting of securities such as banknotes, stock certificates, bonds, gift certificates, lotteries, etc. More specifically, the present invention relates to the use of electronic copiers, color scanners, printing machines and the like. The present invention relates to anti-counterfeiting paper which makes it extremely difficult to perform counterfeiting or tampering.
【０００２】[0002]
【従来の技術】現在、紙は紙幣をはじめ、株券、債券、
商品券、宝くじ等々の財産的価値を有する有価証券類と
して幅広く使用されており、その様な有価証券類に用い
られている用紙には容易に偽造又は変造出来ない様に、
紙自身にすかしを施したり、あるいはマイクロ文字や凹
版、隠し文字、蛍光印刷等の特殊な印刷を施したり、金
属光沢を有する箔やホログラム箔などを転写またはシー
ルで施してあるのが一般的である。2. Description of the Related Art At present, paper includes not only banknotes, but also stocks, bonds,
It is widely used as securities with property value such as gift certificates, lotteries, etc., so that the paper used for such securities cannot be easily forged or altered.
It is common to apply watermarks on the paper itself, or to apply special printing such as micro letters, intaglio, hidden letters, or fluorescent printing, or to transfer or seal a foil with metallic luster or hologram foil. It is.
【０００３】これらの有価証券類を偽造する場合は主に
印刷による方法と電子複写機による方法があるが、今日
では電子複写機の解像度が格段に良くなり、電子複写機
さえあれば手軽に本物と見分けがつかないくらいの複写
物が出来ることから、電子複写による偽造が増加してい
る。この場合、マイクロ文字や隠し文字といったパター
ン印刷法ではオリジナルとコピーを見分けることが困難
になっている。[0003] Forgery of these securities is mainly carried out by a printing method or an electronic copying machine. Today, however, the resolution of the electronic copying machine has been remarkably improved. Forgery by electronic copying is increasing because copies can be made indistinguishably. In this case, it is difficult to distinguish the original from the copy by a pattern printing method such as a micro character or a hidden character.
【０００４】[0004]
【発明が解決しようとする課題】そこで、こういった電
子複写機を用いた偽造への対抗手段として金属光沢の鏡
面反射を有する箔やホログラムのスレッドを紙層中に抄
き込んだ偽造防止用紙が複写防止効果が高いとして一部
の商品券などで採用されている。これらの金属光沢を有
する箔やホログラムを複写すると、ほとんど黒く複写さ
れてしまうため一目見て複写物であることがわかるため
である。ところが、これら金属光沢を有する箔やホログ
ラムのスレッドは細幅のため金属光沢を持つ似たような
箔で代替えして貼り付けられると偽造物との区別がしに
くくなるという問題があった。Therefore, as a countermeasure against forgery using such an electronic copying machine, anti-counterfeit paper in which a foil or hologram thread having a specular reflection of metallic luster is formed in a paper layer. Has been adopted in some gift certificates and the like because of its high copy prevention effect. This is because when these foils and holograms having a metallic luster are copied, they are almost blackened, so that they can be seen at a glance as a copy. However, there is a problem that when these foils and hologram threads having a metallic luster are narrow and replaced with similar foils having a metallic luster, it is difficult to distinguish them from counterfeit products.
【０００５】本発明は以上のような問題点に着目してな
されたものであり、その課題とするところは、真偽判定
が確実にできる偽造防止用紙の提供であり、且つ電子複
写機などによる偽造や偽物の箔などでの変造が難しくな
るようにした、偽造防止策を施した用紙の提供である。SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems. An object of the present invention is to provide a forgery prevention sheet capable of reliably determining the authenticity of a copy. It is an object of the present invention to provide forgery-preventing paper that makes it difficult to forge or forge with fake foil.
【０００６】[0006]
【課題を解決するための手段】前記目的を達成するた
め、本発明は、用紙基材中にスレッドを抄き込んだ偽造
防止用紙であって、スレッドが少なくとも熱変色性隠蔽
層とこれに隠蔽され得る被隠蔽層から成り、かつ、スレ
ッドはその熱変色性隠蔽層が熱変色することによりその
隠蔽性が低下した時に用紙表面から被隠蔽層が認識でき
るように部分的に用紙から露出していることを特徴とす
る。In order to achieve the above object, the present invention relates to a forgery-preventing paper in which a thread is formed in a paper base material, wherein the thread has at least a thermochromic concealing layer and a concealing layer. And the thread is partially exposed from the paper so that the opaque layer can be recognized from the paper surface when the opacity of the thermochromic concealing layer is reduced due to thermal discoloration of the opaque layer. It is characterized by being.
【０００７】また、本発明は、用紙基材中にスレッドを
抄き込んだ偽造防止用紙であって、スレッドが、少なく
ともスレッド基材と被隠蔽層とこの被隠蔽層上に設けた
熱変色性隠蔽層とから成り、かつ熱変色性隠蔽層は常温
では有色だが３０℃以上では無色に消色することを特徴
とする。The present invention also relates to a forgery prevention paper in which a thread is formed in a paper substrate, wherein the thread has at least a thread substrate, a concealed layer, and a thermochromic sheet provided on the concealed layer. The thermochromic concealing layer comprises a concealing layer, and is characterized by being colored at room temperature but decoloring colorless at 30 ° C. or more.
【０００８】また、本発明は、熱変色性隠蔽層は常温で
は明度値が６以下で、３０℃以上では明度値が８以上で
あることを特徴とする。Further, the present invention is characterized in that the thermochromic hiding layer has a lightness value of 6 or less at room temperature and a lightness value of 8 or more at 30 ° C. or more.
【０００９】また、本発明は、スレッド基材が透明であ
ることを特徴とする。また、本発明は、被隠蔽層が金属
層であることを特徴とする。また、本発明は、被隠蔽層
がホログラムであることを特徴とする。また、本発明
は、被隠蔽層が回折格子であることを特徴とする。Further, the present invention is characterized in that the thread base material is transparent. Further, the invention is characterized in that the concealed layer is a metal layer. Further, the invention is characterized in that the concealed layer is a hologram. Further, the invention is characterized in that the concealed layer is a diffraction grating.
【００１０】以下、本発明を図面を参照にして説明す
る。Hereinafter, the present invention will be described with reference to the drawings.
【００１１】図１は本発明の一例を示す平面図であり、
図２は図１のＡ−Ａ線における断面説明図である。FIG. 1 is a plan view showing an example of the present invention.
FIG. 2 is an explanatory sectional view taken along line AA of FIG.
【００１２】図面からも理解できるように、本発明に係
る偽造防止用紙１０は、基本的には、用紙基材１中にス
レッド９を抄き込んだ構成になっている。このスレッド
９は少なくとも熱変色性隠蔽層５とこれに隠蔽され得る
被隠蔽層４から成り、かつスレッド９はその熱変色性隠
蔽層５が熱変色することによりその隠蔽性が低下した時
に用紙表面から被隠蔽層４が認識できるように部分的に
用紙から露出している。As can be understood from the drawings, the anti-counterfeit paper 10 according to the present invention basically has a configuration in which the thread 9 is formed in the paper base material 1. The thread 9 comprises at least a thermochromic concealing layer 5 and a concealed layer 4 which can be concealed by the thermochromic concealing layer 5, and the thread 9 is used when the opacity is reduced due to the thermochromic concealing layer 5 being thermally discolored. Is partially exposed from the paper so that the concealed layer 4 can be recognized.
【００１３】図１においては、スレッド９の一部が用紙
表面から露出している状態を示している。この露出部８
の熱変色性隠蔽層が熱変色してその隠蔽性が低下すると
その下に位置する被隠蔽層が用紙１の表面から目視で確
認できるようになっている。７はスレッド９の抄き込み
部を示しており、用紙基材１中に埋設されている。FIG. 1 shows a state in which a part of the thread 9 is exposed from the surface of the sheet. This exposed part 8
When the heat discoloration concealing layer is discolored by heat and its concealing property decreases, the concealed layer located thereunder can be visually confirmed from the surface of the paper 1. Reference numeral 7 denotes a threading portion of the thread 9, which is embedded in the paper substrate 1.
【００１４】スレッド９は、前記したように、少なくと
も熱変色性隠蔽層５とこれに隠蔽される被隠蔽層４を有
するものであるが、図示の例では、図２からも分かるよ
うに、まず、スレッド基材２上に被隠蔽層４と熱変色性
隠蔽層５とが順次積層されている。As described above, the thread 9 has at least the thermochromic concealing layer 5 and the concealed layer 4 concealed by the thermochromic concealing layer 5. In the illustrated example, as shown in FIG. The concealed layer 4 and the thermochromic concealment layer 5 are sequentially laminated on the thread base material 2.
【００１５】次に、この積層体の上下には更に結着剤層
３，６が積層されている。この結着剤層３，６は、用紙
抄造時にスレッド９に植物繊維等に対する結合力を付与
するために設けるものである。Next, binder layers 3 and 6 are further laminated on the upper and lower sides of the laminate. The binder layers 3 and 6 are provided to give the thread 9 a binding force to plant fibers and the like during papermaking.
【００１６】これらの層は具体的には、澱粉系、メチル
セルロース系、カルボキシル化セルロース系、ヒドロキ
シエチルセルロース系、ＰＶＡ系、ポリビニルピロリド
ン系、ビニルエチルエーテル−無水マレイン酸共重合体
系、ポリアクリル酸系、ポリエチレンオキサイド系等か
ら成り、グラビアコーティング等の各種コーティング
法、グラビア印刷、スクリーン印刷等の印刷法によって
１〜１０μｍ程度の膜厚で設けられる。These layers are specifically starch-based, methylcellulose-based, carboxylated cellulose-based, hydroxyethylcellulose-based, PVA-based, polyvinylpyrrolidone-based, vinylethylether-maleic anhydride copolymer-based, polyacrylic acid-based, It is made of polyethylene oxide or the like, and is provided with a film thickness of about 1 to 10 μm by various coating methods such as gravure coating and the like, and printing methods such as gravure printing and screen printing.
【００１７】一方、スレッド９は前記した構成である
が、スレッド基材２としては、例えば、透明性に優れ、
機械的に強く柔軟性や可とう性を有するポリエチレンテ
レフタレートやポリ塩化ビニル、ポリアクリレート等の
高分子材料からなるフィルム状のプラスチックが必要に
応じて用いられる。フィルムでは一般的には、厚さ１５
〜５００μｍで、この場合あまり厚いと印刷用紙として
の意匠性を損なうので、スレッド基材として適用する時
の厚さとしては１５〜５０μｍのものが好ましい。On the other hand, although the thread 9 has the above-described configuration, the thread base material 2 has, for example, excellent transparency,
A film-like plastic made of a polymer material such as polyethylene terephthalate, polyvinyl chloride, or polyacrylate, which is mechanically strong and has flexibility and flexibility, is used as needed. Films generally have a thickness of 15
In this case, if the thickness is too large, the design property as a printing paper is impaired. Therefore, the thickness when applied as a thread base material is preferably 15 to 50 μm.
【００１８】被隠蔽層４は、オフセット印刷法やスクリ
ーン印刷法などによる文字や絵柄層の他、金属箔やホロ
グラム等が適用できる。As the concealed layer 4, a metal foil, a hologram, or the like can be applied in addition to a character or picture layer formed by an offset printing method or a screen printing method.
【００１９】一方、この被隠蔽層４を隠蔽しておくため
に設ける熱変色性隠蔽層５は、熱変色性材料を混合した
示温インキにより、印刷やコーティング方法等により形
成すればよい。On the other hand, the thermochromic concealing layer 5 provided for concealing the concealed layer 4 may be formed by printing, coating, or the like, using a temperature indicating ink mixed with a thermochromic material.
【００２０】熱変色性隠蔽層５を前記した被隠蔽層４上
に設けると、例えば、体温などで３０℃以上に熱変色性
隠蔽層５を加温した際にその部分が無色化したり明度値
が上がることにより、隠蔽性が低下し、下部に隠蔽され
ていた被隠蔽層４が現出することになる。この被隠蔽層
４の現出は、用紙の真偽判定に対して有効に作用する。When the thermochromic concealing layer 5 is provided on the concealed layer 4 described above, for example, when the thermochromic concealing layer 5 is heated to 30 ° C. or more at body temperature or the like, the portion becomes colorless or has a lightness value. Is increased, the concealing property is reduced, and the concealed layer 4 concealed at the lower portion appears. The appearance of the concealed layer 4 effectively acts on the authenticity determination of the sheet.
【００２１】前記した熱変色性材料としては、例えば、
電子供与性化合物と電子受容性化合物と両者の呈色反応
を可逆的に生起させる有機化合物媒体とを主体とするも
のが適用される。この発色状態の色濃度の明度値は６以
下で、消色状態の無色の明度値は８以上であることが好
ましい。この熱変色性材料は無色のポリビニルアルコー
ル系水溶性バインダーに添加して示温インキとし、熱変
色性隠蔽層５の形成に用いれば良い。As the thermochromic material described above, for example,
A compound mainly composed of an electron-donating compound, an electron-accepting compound, and an organic compound medium which reversibly causes a color reaction between both compounds is applied. It is preferable that the lightness value of the color density in the color-developed state is 6 or less, and the colorless lightness value in the decolored state is 8 or more. This thermochromic material may be added to a colorless polyvinyl alcohol-based water-soluble binder to form a thermochromic ink and used for forming the thermochromic concealing layer 5.
【００２２】一方、用紙基材１は、針葉樹や広葉樹、イ
ネ、エスパルト、バガス、麻、亜麻、ケナフ、カンナビ
ス等のパルプ繊維と、ポリエチレンテレフタレート、ポ
リプロピレン、ポリアクリレート、ポリ塩化ビニル等の
プラスチックから作られた合成繊維などを原料として作
られる。この際、上記スレッドのすき込みには、針金あ
るいは薄板（金属その他）を切り抜いて作った型をワイ
ヤーパート上に固定したものを漉き網として使い、この
部分にスレッドをあてて、これが隠れる様にすき込む方
法が採用できる。On the other hand, the paper substrate 1 is made of pulp fibers such as softwood, hardwood, rice, esparto, bagasse, hemp, flax, kenaf and cannabis, and plastics such as polyethylene terephthalate, polypropylene, polyacrylate and polyvinyl chloride. It is made from synthetic fibers and the like. At this time, the thread is cut into a wire net using a wire or a mold made by cutting a thin plate (metal or other material). The thread is applied to this part so that the thread is hidden. A method of inserting can be adopted.
【００２３】スレッドの用紙基材１中への抄き込みは、
上述の方法に限定されるものではなく、例えば抄き合わ
せ法などにより、スレッド９が部分的に用紙から露出す
る様にしてやればよい。The incorporation of the thread into the paper substrate 1 is as follows.
The method is not limited to the above-described method, and the thread 9 may be partially exposed from the sheet by, for example, a laminating method.
【００２４】用紙基材には、不透明性を付与したり、筆
記性等を付与する目的で製紙用添加剤を添加してもよ
い。例えば、てん料としてはクレイ、タルク、炭酸カル
シウム、二酸化チタン等があり、サイズ剤としてはロジ
ン、アルキル・ケテン・ダイマー、無水ステアリン酸、
アルケニル無水こはく酸、ワックス等があり、紙力増強
剤には変性デンプン、ポリビニルアルコール、ポリアク
リルアミド、尿素−ホルムアルデヒド、メラミン−ホル
ムアルデヒド、ポリエチレンイミン等があり、これらの
材料をそれぞれ抄紙時に加え、長網抄紙機や円網抄紙機
を用いて抄造する。To the paper base material, a papermaking additive may be added for the purpose of imparting opacity or providing writability. For example, fillers include clay, talc, calcium carbonate, and titanium dioxide, and sizing agents include rosin, alkyl ketene dimer, stearic anhydride,
There are alkenyl succinic anhydrides, waxes, etc., and paper strength agents include modified starch, polyvinyl alcohol, polyacrylamide, urea-formaldehyde, melamine-formaldehyde, polyethyleneimine, etc. The paper is made using a paper machine or a round paper machine.
【００２５】抄紙方法は、通常の植物繊維紙の製造に用
いられる方法でよく、原料濃度０．５〜１０％好ましく
は１〜２％の水希薄原料で十分に膨潤させた繊維をよく
混練しスダレ・網目状のワイヤー等に流して並べ、搾水
後加温により水分を蒸発させて作る。この時、原料のセ
ルロースの水酸基間の水素結合で繊維が強く結ばれ、用
紙基材に強度が付与される。The paper-making method may be a method used in the production of ordinary plant fiber paper. The fiber sufficiently swelled with a water-diluted raw material having a raw material concentration of 0.5 to 10%, preferably 1 to 2% is kneaded well. It is made by spilling it on a slender, mesh-like wire, etc., squeezing water, and evaporating water by heating. At this time, the fibers are strongly bound by the hydrogen bond between the hydroxyl groups of the cellulose as the raw material, and the strength is given to the paper substrate.
【００２６】また、植物繊維以外の例えば合成繊維を混
入した用紙の場合は合成繊維間に水素結合などの結合力
を持たないため結着剤を必要とすることが多いので、合
成繊維比率と結着剤量は、用紙の強度を落とさない程度
に適宜決めて用いることが望ましい。Further, in the case of paper mixed with synthetic fibers other than vegetable fibers, for example, a binding agent is often required since there is no binding force such as hydrogen bonding between the synthetic fibers, so that the synthetic fiber ratio and It is desirable that the amount of the adhesive is appropriately determined and used so as not to lower the strength of the sheet.
【００２７】[0027]
【作用】上述したように、本発明の用紙は、金属層やホ
ログラム層上もしくは印刷層等の被隠蔽層上に熱変色性
隠蔽層を積層したことより、真偽判定の際、指などで触
り３０℃以上に加温すると熱変色性隠蔽層が有色から無
色にあるいは隠蔽性が低下することにより、熱変色性隠
蔽層の下に隠れて見えなかった金属光沢や印刷文字が見
えるようになり、偽造防止用紙としての機能を更に強化
しつつ、真偽判定を確実なものとした。As described above, the paper of the present invention has a thermochromic concealing layer laminated on a metal layer, a hologram layer, or a concealed layer such as a printed layer. When the touch is heated to 30 ° C. or more, the thermochromic concealing layer changes from colored to colorless or has a reduced concealing property, so that metallic gloss and printed characters hidden under the thermochromic concealing layer become invisible. In addition, the authenticity judgment was made sure while further strengthening the function as the forgery prevention paper.
【００２８】[0028]
【発明の実施の形態】以下、本発明の実施例を、図面に
従って説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００２９】（実施例１）実施例１として図１と図２を
参照に以下に説明する。厚さ１５μｍのポリエチレンテ
レフタレートフィルムからなるスレッド基材２上に、
「本物」の文字をグラビア印刷法にて印刷し、被隠蔽層
４を形成した。次に、その上に、３−（４−ジエチルア
ミノ−２−エトキシフェニル）−３−（１−エチル−２
−メチルインドール−３−イル）−４−アザフタリド
１．５部、ビスフェノ−ルＡ６部、ステアリン酸ネオペ
ンチル５０部の相容体からなる熱変色性組成物をエポキ
シ樹脂／アミン系硬化剤の界面重合法によるマイクロカ
プセル化で得られた平均粒径８μｍのマイクロカプセル
形態で、発色時の明度値が３．２、消色時の明度値が
８．７である熱変色性材料とアクリル酸エステルとから
なる熱変色性材料で、厚み約４０μｍの熱変色性隠蔽層
５を形成した。次に、この様にして得られた積層体の上
面と下面に、厚さ２μｍの水溶性ＰＶＡ系バインダーを
グラビアコーティング法にてコーティングし、結着層
３，６を順次積層した。そしてこの積層体を直線状の細
巾にスリットしてスレッド９を得た。しかる後に、針葉
樹パルプを水中で叩解後、手漉き装置を用いてワイヤー
で抄いて直線状に前記スレッドが漉き込まれる様に脱水
後乾燥させて用紙１０（１２０ｇ／ｍ2 ）を作製した。Embodiment 1 Embodiment 1 will be described below with reference to FIGS. 1 and 2. FIG. On a thread substrate 2 made of a polyethylene terephthalate film having a thickness of 15 μm,
The letters “real” were printed by a gravure printing method to form the concealed layer 4. Next, 3- (4-diethylamino-2-ethoxyphenyl) -3- (1-ethyl-2
-Methylindol-3-yl) -4-azaphthalide (1.5 parts), bisphenol A (6 parts), neopentyl stearate (50 parts), a thermochromic composition comprising an epoxy resin / amine-based curing agent A thermochromic material having a lightness value of 3.2 at the time of color development and a lightness value of 8.7 at the time of color erasing, in the form of microcapsules having an average particle size of 8 μm obtained by microencapsulation according to a legal method; A thermochromic concealing layer 5 having a thickness of about 40 μm was formed using a thermochromic material composed of Next, a water-soluble PVA-based binder having a thickness of 2 μm was coated on the upper and lower surfaces of the thus obtained laminate by a gravure coating method, and the binder layers 3 and 6 were sequentially laminated. The laminate was slit into a linear narrow width to obtain a thread 9. After that, the softwood pulp was beaten in water, then it was made with a wire using a hand making device, dehydrated and dried so that the thread was formed in a straight line, thereby producing paper 10 (120 g / m 2 ).
【００３０】（実施例２）実施例１の印刷層からなる被
隠蔽層の代わりに、光の干渉を用いて立体画像や特殊な
装飾画像を表現し得るホログラム層を被隠蔽層とし、そ
の他は実施例１と同様の構成とし、偽造防止用紙を作製
した。Example 2 Instead of the concealed layer consisting of the printed layer of Example 1, a hologram layer capable of expressing a three-dimensional image or a special decorative image using light interference is used as the concealed layer. The same configuration as in Example 1 was used, and anti-counterfeit paper was produced.
【００３１】（比較例１）比較例として、図３と図４に
示す構成の用紙１１を作製した。図４は図３のＢ−Ｂ線
における断面説明図である。この用紙１１は、本発明の
用紙１０と同様に、用紙基材１２中にスレッド１７が抄
き込んである。しかし、スレッド１７の構成が本発明の
ものと異なっている。(Comparative Example 1) As a comparative example, a sheet 11 having the structure shown in FIGS. 3 and 4 was prepared. FIG. 4 is an explanatory sectional view taken along line BB in FIG. The paper 11 has a thread 17 machined in a paper base material 12 as in the paper 10 of the present invention. However, the configuration of the thread 17 is different from that of the present invention.
【００３２】即ち、図面にも示す様に、比較例における
スレッド１７はスレッド基材１３の一方の面に、印刷層
１４が積層されており、かつこの積層体の上下面には結
着剤層１５，１６がそれぞれ積層されている。要する
に、このスレッド１７は印刷層１４を必要に応じて隠蔽
させておくための熱変色性隠蔽層を具備していない。図
３中、１８はスレッド露出部、１９はスレッド抄き込み
部をそれぞれ示している。That is, as shown in the drawing, the thread 17 in the comparative example has a printing layer 14 laminated on one surface of a thread base material 13 and a binder layer on the upper and lower surfaces of the laminate. 15 and 16 are respectively laminated. In short, the thread 17 does not have a thermochromic hiding layer for hiding the printing layer 14 as needed. In FIG. 3, reference numeral 18 denotes a thread exposure part, and 19 denotes a thread making part.
【００３３】（比較例２）一方、別の比較例として図５
と図６に示す構成の用紙２１を作製した。図６は図５の
Ｃ−Ｃ線における断面説明図である。この用紙２１にお
けるスレッド２５は抄き込みによるものではなく、用紙
基材２２の表面に金属箔２３と接着層２４とから成るス
レッドを部分的に貼り込んだものである。Comparative Example 2 On the other hand, as another comparative example, FIG.
And paper 21 having the configuration shown in FIG. FIG. 6 is an explanatory sectional view taken along line CC of FIG. The thread 25 of the paper 21 is not formed by paper-making, but is formed by partially attaching a thread made of a metal foil 23 and an adhesive layer 24 to the surface of a paper base material 22.
【００３４】[0034]
【発明の効果】実施例１と比較例１の用紙を比較する
と、実施例では真偽判定の際、スレッド部分を指で触り
３０℃以上に加温すると熱変色性隠蔽層が無色に変化す
ることによって「本物」の文字（被隠蔽層）が見えるよ
うになり、本物であることが容易に判定できるが、比較
例１ではスレッドの一部分が紙中に抄き込んであること
だけで真偽判定をしなければならないので真偽が分かり
づらい。また、実施例１と比較例１の用紙を電子複写機
で複写した場合、実施例１の用紙では先の比較と同様の
方法で容易に複写物と本物とを判別できるが、比較例１
の用紙では見た目には精巧な複写物となってしまう。実
施例２と比較例２の用紙との比較では、一目見ただけで
は比較例２は僞物と分かりづらく本物と似たような印象
となっているが、実施例２の用紙では、指などで３０℃
以上に加温すると熱変色性隠蔽層が無色に変化すること
によって熱変色性隠蔽層の下のホログラム層が（被隠蔽
層）が見えるようになり真偽判定が簡単確実である。When the paper of Example 1 is compared with the paper of Comparative Example 1, the thermochromic concealment layer changes to colorless when the thread portion is touched with a finger and heated to 30 ° C. or more when authenticity is determined. As a result, the characters of "real" (the concealed layer) become visible, and it can be easily determined that the characters are real. However, in Comparative Example 1, the genuineness is true only because a part of the thread is embedded in the paper. It is difficult to tell the truth because you have to judge. When the sheets of Example 1 and Comparative Example 1 are copied by an electronic copying machine, the copy of Example 1 can be easily distinguished from the copy by the same method as in the previous comparison.
With this paper, it looks like an elaborate copy. In comparison between the paper of Example 2 and the paper of Comparative Example 2, at first glance, Comparative Example 2 is hard to recognize as a fake and has an impression similar to the real paper. At 30 ° C
By heating as described above, the thermochromic concealing layer changes to colorless, so that the hologram layer below the thermochromic concealing layer (the concealed layer) can be seen, and the authenticity determination is simple and reliable.
【００３５】[0035]
【図１】本発明の一実施例に係る平面図である。FIG. 1 is a plan view according to an embodiment of the present invention.
【図２】図１のＡ−Ａ線における断面説明図である。FIG. 2 is an explanatory sectional view taken along line AA of FIG. 1;
【図３】本発明の比較例に係る平面図である。FIG. 3 is a plan view according to a comparative example of the present invention.
【図４】図３のＢ−Ｂ線における断面説明図である。FIG. 4 is an explanatory sectional view taken along line BB of FIG. 3;
【図５】本発明の更に他の比較例に係る断面説明図であ
る。FIG. 5 is an explanatory cross-sectional view according to still another comparative example of the present invention.
【図６】図５のＣ−Ｃ線における断面説明図である。FIG. 6 is an explanatory sectional view taken along line CC of FIG. 5;
１，１２，２２‥‥用紙基材 ２，１３‥‥スレッド基材 ３，６，１５，１６‥‥結着剤層 ４‥‥被隠蔽層 ５‥‥熱変色性隠蔽層 ７，１９‥‥スレッド抄き込み部 ８，１８‥‥スレッド露出部 ９，１７，２５‥‥スレッド １０‥‥偽造防止用紙 1,12,22 {Paper base 2,13} Thread base 3,6,15,16 {Binder layer 4} Hidden layer 5 {Thermochromic hiding layer 7,19} Thread making part 8,18 Thread exposure part 9,17,25 Thread 10 Forgery prevention paper
Claims (7)
止用紙において、スレッドが少なくとも熱変色性隠蔽層
とこれに隠蔽され得る被隠蔽層から成り、かつスレッド
はその熱変色性隠蔽層が熱変色することによりその隠蔽
性が低下した時に用紙表面から被隠蔽層が認識できるよ
うに部分的に用紙から露出していることを特徴とする偽
造防止用紙。An anti-counterfeit paper in which threads are formed in a paper substrate, wherein the threads comprise at least a thermochromic concealing layer and a concealable layer which can be concealed by the thermochromic concealing layer, and the thread comprises the thermochromic concealing layer. Wherein the opaque layer is partially exposed from the paper so that the concealable layer can be recognized from the surface of the paper when its concealing property is reduced due to thermal discoloration.
隠蔽層とこの被隠蔽層上に設けた熱変色性隠蔽層とから
成り、かつ熱変色性隠蔽層は常温では有色だが３０℃以
上では無色に消色することを特徴とする請求項１に記載
の偽造防止用紙。2. The thread comprises at least a thread base material, a concealed layer and a thermochromic concealing layer provided on the concealed layer, and the thermochromic concealing layer is colored at room temperature but colorless at 30 ° C. or more. The forgery prevention paper according to claim 1, wherein the paper is erased.
で、３０℃以上では明度値８以上であることを特徴とす
る請求項２に記載の偽造防止用紙。3. The forgery prevention paper according to claim 2, wherein the thermochromic concealing layer has a lightness value of 6 or less at room temperature and a lightness value of 8 or more at 30 ° C. or more.
る請求項１または２に記載の偽造防止用紙。4. The anti-counterfeit paper according to claim 1, wherein the thread base material is transparent.
請求項１または２に記載の偽造防止用紙。5. The anti-counterfeit paper according to claim 1, wherein the concealed layer is a metal layer.
する請求項１または２に記載の偽造防止用紙。6. The anti-counterfeit paper according to claim 1, wherein the concealed layer is a hologram.
る請求項１または２に記載の偽造防止用紙。7. The anti-counterfeit paper according to claim 1, wherein the concealed layer is a diffraction grating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5490397A JPH10251999A (en) | 1997-03-10 | 1997-03-10 | Paper for preventing forgery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5490397A JPH10251999A (en) | 1997-03-10 | 1997-03-10 | Paper for preventing forgery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10251999A true JPH10251999A (en) | 1998-09-22 |
Family
ID=12983576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5490397A Pending JPH10251999A (en) | 1997-03-10 | 1997-03-10 | Paper for preventing forgery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10251999A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6495295B1 (en) * | 1999-01-19 | 2002-12-17 | Dai Nippon Printing Co., Ltd. | Hologram transfer film |
| WO2007007784A1 (en) * | 2005-07-12 | 2007-01-18 | Toppan Printing Co., Ltd. | Thread and production method therefor, forgery preventing form using thread, and forgery preventing printed matter, and forgery judging method using them |
| CN103321105A (en) * | 2013-05-14 | 2013-09-25 | 珠海经济特区红塔仁恒纸业有限公司 | Thermosensitive color-changing anti-counterfeiting coating white cardboard and producing method thereof |
| JP2018203933A (en) * | 2017-06-07 | 2018-12-27 | 三菱鉛筆株式会社 | Aqueous ink composition for writing instrument |
-
1997
- 1997-03-10 JP JP5490397A patent/JPH10251999A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6495295B1 (en) * | 1999-01-19 | 2002-12-17 | Dai Nippon Printing Co., Ltd. | Hologram transfer film |
| US7141336B2 (en) | 1999-01-19 | 2006-11-28 | Dai Nippon Printing Co., Ltd. | Hologram transfer film |
| WO2007007784A1 (en) * | 2005-07-12 | 2007-01-18 | Toppan Printing Co., Ltd. | Thread and production method therefor, forgery preventing form using thread, and forgery preventing printed matter, and forgery judging method using them |
| JP4973495B2 (en) * | 2005-07-12 | 2012-07-11 | 凸版印刷株式会社 | Anti-counterfeit paper, anti-counterfeit printed matter, and methods for determining their authenticity |
| US8573651B2 (en) | 2005-07-12 | 2013-11-05 | Toppan Printing Co., Ltd. | Thread and method of manufacturing the same, counterfeit preventive paper using thread, counterfeit preventive printed material, and method of judging authenticity utilizing them |
| CN103321105A (en) * | 2013-05-14 | 2013-09-25 | 珠海经济特区红塔仁恒纸业有限公司 | Thermosensitive color-changing anti-counterfeiting coating white cardboard and producing method thereof |
| JP2018203933A (en) * | 2017-06-07 | 2018-12-27 | 三菱鉛筆株式会社 | Aqueous ink composition for writing instrument |
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