JP3817885B2 - Anti-counterfeiting thread and anti-counterfeiting paper - Google Patents
Anti-counterfeiting thread and anti-counterfeiting paper Download PDFInfo
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【０００１】
【発明の属する技術分野】
本発明は、偽造防止用紙用スレッドおよび偽造防止用紙に関するものである。さらに詳しくは、耐ブロッキング性を有するスレッドと、抄紙機で紙層間の所定の位置に該スレッドを挿入し、抄紙した偽造防止用紙に関する。
【０００２】
【従来の技術】
近年、複写技術の進歩によって、有価証券類の偽造が容易となり、大きな社会問題となっているため、紙幣、商品券、小切手、株券、パスポート、身分証明書、カードなどは不正に変造、偽造できないように、各種の偽造防止対策が施されている。
【０００３】
偽造防止対策としては、特開昭４８−７５８０８号、特公昭５２−４８６６０号、特開昭５１−１３０３０８号公報等に記載の、紙層間に糸状物（スレッドと称す）を抄き込んだ、いわゆる糸入り紙と称する偽造防止用紙がある。
【０００４】
紙層間に抄き込むスレッドの形態は、一般的に１０〜１００μｍ程度の厚みで、０．２〜３０ｍｍ程度の巾の糸状あるいはテープ状のものであり、金属蒸着フィルムが一般的に使用されている。近年は、高度な複写機の技術による偽造を防止するため、複製が非常に困難なホログラム、ピクセルグラム、グレーティングイメージ等がクレジットカード、紙幣等に貼付されているが、これらを応用した金属蒸着フィルムもスレッドとして使用される。これらのスレッドを抄き込んだ偽造防止用紙は複写機で複写してもスレッドの金属光沢部分は偽造できず、変造することが困難である。
【０００５】
しかしながら、スレッドを抄き込んだ偽造防止用紙において、紙層とスレッドが強固に接着していないと、スレッドを引っ張ると紙層間から抜けて偽造防止用紙としての価値が損なわれたり、脱落したスレッドが偽造、変造の目的に流出される恐れを生じてしまう。
【０００６】
このような問題を解決する手段として、例えば、抄紙工程においてサイズプレス液に水溶性接着剤を使用したり、特開平７−５６３７７号公報に記載されているように、スレッドに熱可塑性樹脂や水溶性接着剤を塗工して紙層との接着強度を向上させる方法等が挙げられる。しかしながら、サイズプレス液では十分な接着強度が得られないし、スレッドに熱可塑性樹脂や水溶性接着剤を塗工しながら紙層間に抄き込むことは既存の設備では困難である。
【０００７】
また、あらかじめ接着剤層を設けたスレッドを使用する方法では、スレッドを抄き込む前に、巻取内部で重なり合うスレッド同士がブロッキングをおこして偽造防止用紙の製造に支障をきたす場合があるため、スレッドの両面に接着剤層を設けることが困難であった。また、耐ブロッキング性に優れた接着剤を選択しても、スレッド巻取を長期間において使用上障害とならないように保存することは難しい。ちなみに、片面のみに接着剤層を設けたスレッドを使用すると、接着剤層を設けなかった側でスレッドから紙層が浮き上がるなど、偽造防止用紙としての美観がそこなわれてしまうという欠点がある。
【０００８】
【発明が解決しようとする課題】
本発明は、紙層間中に抄き込んで使用する偽造防止用紙用スレッドにおいて、長期間の保存でもブロッキングを起こすことのない優れたスレッドを提供するものである。また本発明は該スレッドを用いた偽造防止用紙を提供するものである。
【０００９】
【課題を解決するための手段】
本発明者らは偽造防止用紙の製造に使用するスレッドに塗布する接着剤について鋭意研究を行った結果、スレッドと紙層との接着強度を低下させることなく、スレッドのブロッキングを極めて効果的に防止できることを見いだし、本発明を完成させるに至った。
【００１０】
すなわち、本発明は、糸状またはテープ状の基材の両面に熱可塑性および／または水再湿性の接着剤層を設けたスレッドを紙層中に抄き込む偽造防止用紙において、該スレッドに設けた表裏接着剤層の少なくとも一方の接着剤層に、接着剤１００重量部に対し１〜１５重量部のソープフリー型ポリエチレンワックス潤滑剤を含有することを特徴とする偽造防止用紙用スレッドである。
【００１１】
また、本発明は、上記の偽造防止用紙用スレッドを紙層間に抄き込んだことを特徴とする偽造防止用紙である。
【００１２】
【発明の実施の形態】
本発明のスレッドは広幅のスレッド基材に接着剤を塗布、乾燥してから所定の幅にスリット加工してボビンに巻き取られたものであり、一度に大量のスレッド巻取製造することが生産効率上好ましい。従って、本発明のスレッドは偽造防止用紙の抄造に使用するまで、通常１週間から６ヶ月間程度巻取の状態で保存される。
【００１３】
また、本発明に使用されるスレッドは巻取の状態で保存されるため、巻取内部のような加圧条件でも、重なり合うスレッドの接着剤層同士がブロッキングを起こさないことが必要である。
【００１４】
このような長期間の保存でもスレッドがブロッキングを起こさないために、本発明は、スレッドの接着剤層に潤滑剤を含有させ、接着剤最表面の接着性を低下させることにより著しくブロッキングを改善させるものである。
【００１５】
すなわち、スレッドに設ける表裏接着剤層の少なくとも一方の接着剤層に予め潤滑剤を含有させることにより、スレッドに接着剤塗工後、該潤滑剤が表面に偏在し、最表面の接着性が低下することで接着剤層同士のブロッキングを抑制できるものである。
【００１６】
接着剤同士がブロッキングを起こさないための潤滑剤の添加量は、接着剤１００重量部に対して１〜１５重量部、好ましくは３〜１０重量部である。ちなみに、添加量が１重量部に満たないと本発明の所望とするブロッキングに対する効果が得られず、また、１５重量部を越えると経済上好ましくないばかりか、紙層との接着強度が低下するため好ましくない。
【００１８】
潤滑剤としては、乳化剤を含有しないソープフリー型のものが紙層との接着強度を低下させないため好ましく、さらに、ポリエチレンワックスは特に耐ブロッキングの効果が優れるため好ましい。
【００１９】
本発明に使用するスレッド用接着剤の樹脂は、特に限定されないが、アクリル系樹脂、スチレン−ブタジエン系樹脂、スチレン−イソプレン系樹脂、ポリエステル系樹脂、エチレン−酢酸ビニル系樹脂、酢酸ビニル−ビニルアルコール系樹脂等、一般にヒートシール接着剤として使用できる公知、公用の樹脂組成物であるが、エチレン−酢酸ビニル系樹脂、ポリエステル系樹脂、塩化ビニル−酢酸ビニル系樹脂、オレフィン系樹脂、アクリル系樹脂またはアクリル−スチレン系樹脂が特に好ましく用いられる。
【００２０】
これらの樹脂はそのまま接着剤として使用してもよいし、複数の樹脂を混合して使用してもよい。また必要に応じて、各種公知の染料や顔料、消泡剤や濡れ剤等の界面活性剤、ブロッキング防止剤、増粘剤等の助剤を添加してもよい。
【００２１】
接着剤の塗布方法は、ハケ塗り、スプレー塗布、ロールコーター、マイヤーバーコーター、グラビアロールコーター、ブレードコーター、エアーナイフコーター等の各種塗布装置によって行われ、乾燥は上記の塗布装置に組み合わせた従来の方法で行われる。なお、塗布量は乾燥重量で０．５〜１５ｇ／ｍ2程度が好ましいが、これより少ないと十分な接着強度が得られず、多いと接着機能が飽和し経済上好ましくない。
【００２２】
本発明で使用するスレッド基材は特に限定されないが、薄くて強度にも優れる厚さ１０〜１００μｍ程度のＰＥＴフィルムが一般によく使用される。ＰＥＴフィルムには偽造防止や装飾的な目的から金属蒸着や、文字、図柄等の印刷、ホログラム、グレーティングイメージ等の光学的な特殊処理等を施したり、磁気記録層を設けて情報を付与したりすることもできる。なお、スレッド基材は接着剤を塗布、乾燥後に所定の巾にスリット加工し、スレッドとして使用される。
【００２３】
こうして得られたスレッドを、各種のワイヤーパートを組み合わせた公知の多層抄き抄紙機の抄き合わせ工程で紙層間に挿入し、必要に応じて抄紙途中で各種表面サイズ等をサイズプレス装置等で塗工し、ドライヤーで乾燥して目的とする偽造防止用紙を得る。また、得られた偽造防止用紙にマシンカレンダーやスーパーカレンダー処理を施したり、各種塗工装置で表面に顔料塗被層、感熱記録層、熱転写受像層等を設けてもよい。
【００２４】
本発明で得られた偽造防止用紙は、通常さらに所望の印刷および断裁等を行い、紙幣や商品券、磁気記録層を設けて切符やプリペイドカード等として使用される。
【００２５】
【実施例】
以下に実施例を示して本発明をより具体的に説明するが、もちろんのこと、本発明はこれによって限定されるものではない。なお、実施例における「部」は特に指定しない限り「固形重量部」のことを示す。
【００２６】
実施例１
〔スレッドの作製〕
基材として、厚さ１２μｍのアルミ蒸着ＰＥＴフィルム（商標；Ｇ１３０２Ｅ−１２／ダイヤホイルヘキスト社製）のＰＥＴフィルム面側に、ガラス転移温度約２５℃のアクリル系接着剤（商標；ＮｉｐｏｌＬＸ−８１４／日本ゼオン株式会社製）を乾燥重量で２ｇ／ｍ2、アルミ蒸着面にガラス転移温度約３２℃のポリエステル系接着剤（商標；プラスコートＲＺ−６４８／瓦応化学工業社製）１００部に潤滑剤として、ポリエチレンワックス（ソープフリー型 商標；スリップエイドＳＬ−１４０／サンノプコ社製）を１０部配合したものを乾燥重量で３．０ｇ／ｍ2となるように、グラビアロールコーターで塗布乾燥させた。ついで、マイクロスリッターで１ｍｍ巾にスリット後、ボビンに巻き取り、スレッドを得た。
【００２７】
〔偽造防止用紙の製造〕
二槽のシリンダーバットを備えた円網抄紙機の、一槽目の円網シリンダーの同一円周表面上にあらかじめ１ｃｍ×１ｃｍの形のテープを１ｃｍ間隔で貼り付けて網目を塞いでおき、第一紙層として１ｃｍおきに１ｃｍ×１ｃｍの穴が空いた紙層を形成するようにした。二槽目の円網シリンダーには細工を施さず、無地の第二紙層を形成するようにした。また、スレッド巻き出し装置を第一槽目と第二槽目の円網シリンダー間に設置し、スレッドが第一紙層の穴と重なる位置に、第二紙層とアルミ蒸着面側が接する向きで挿入されるようにした。なお、この抄紙機で抄造される湿潤紙（水分約５０％）は、１２本のシリンダードライヤー（表面温度約７０〜１００℃）で乾燥後、マシンカレンダー処理される。上記抄紙機により、作成したスレッドを使用して、スレッドが片面で露出と埋没を繰り返したタイプの偽造防止用紙を得た。
【００２８】
実施例２
実施例１において、ポリエチレンワックス（ソープフリー型 商標；スリップエイドＳＬ−１４０／サンノプコ社製）の配合量を２部に変更した以外は、実施例１と同様にして偽造防止用紙を得た。
【００２９】
実施例３
実施例１において、ポリエチレンワックスを水溶性シリコーン（ソープフリー型商標；ＹＦ−３８４２／東芝シリコーン社製）の配合量を１０部に変更した以外は、実施例１と同様にして偽造防止用紙を得た。
【００３０】
実施例４
実施例１において、ソープフリー型潤滑剤ポリエチレンワックス（商標；スリップエイドＳＬ−１４０／サンノプコ社製）を潤滑剤ポリエチレンワックス（商標；ノプコートＰＥＭ−１７／サンノプコ社製）の配合量を１０部に変更した以外は、実施例１と同様にして偽造防止用紙を得た。
【００３１】
比較例１
実施例１において、ソープフリー型潤滑剤であるポリエチレンワックスを無配合に変更した以外は、実施例１と同様にして偽造防止用紙を得た。
【００３２】
比較例２
実施例１において、ポリエチレンワックス（ソープフリー型 商標；スリップエイドＳＬ−１４０／サンノプコ社製）の配合量を２０部に変更した以外は、実施例１と同様にして偽造防止用紙を得た。
【００３３】
「評価」
〔ブロッキング〕
スレッドを６ヶ月間巻取状態で保存後、巻き出しながら紙層間に抄き込み、スレッドの繰り出し易さを目視評価と製造状況から、下記の基準で判断した。
◎：スレッド巻取にはブロッキングが全く見られない。
○：スレッド巻取に若干のブロッキングが見られるが、問題なく製造できる。
△：繰り出しがやや不安定で、長時間の操業ではスレッド切れが発生する。
×：ブロッキングがひどく、スレッドが頻繁に切れるため、製造に適さない。
【００３４】
〔接着強度〕
得られた各偽造防止用紙のスレッドを１８０°の角度、０．１ｍ／分の速度で引き剥がし、紙層との接着強度を下記の基準で判断した。
◎：スレッド露出部分の接着強度が１５ｇｆ／１ｍｍ以上あり、紙層との接着強度に極めて優れる。
○：スレッド露出部分の接着強度が１０〜１５ｇｆ／１ｍｍであり、問題なく使用できる。
△：スレッド露出部分の接着強度が５〜１０ｇｆ／１ｍｍであり、実用上やや問題がある。
×：スレッド露出部分の接着強度が５ｇｆ／１ｍｍ未満で、使用できない。
【００３５】
【表１】
【発明の効果】
表１の結果から明らかなように、本発明のスレッドは耐ブロッキング性に極めて優れ、しかもスレッドの接着強度に優れた偽造防止用紙を製造することができる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an anti-counterfeit thread and an anti-counterfeit paper. More specifically, the present invention relates to a thread having anti-blocking property and a forgery-preventing paper in which the thread is inserted at a predetermined position between paper layers by a paper machine.
[0002]
[Prior art]
In recent years, advances in copying technology have facilitated the forgery of securities, which has become a major social problem, so banknotes, gift certificates, checks, stock certificates, passports, identification cards, cards, etc. cannot be illegally altered or forged. Thus, various anti-counterfeiting measures are taken.
[0003]
As a countermeasure against forgery, a thread (called a thread) is incorporated between paper layers described in JP-A-48-75808, JP-B-52-48660, JP-A-51-130308, and the like. There is anti-counterfeit paper called so-called threaded paper.
[0004]
The form of the thread to be laid between the paper layers is generally about 10 to 100 μm in thickness and is about 0.2 to 30 mm wide in the form of a thread or tape, and a metal vapor deposition film is generally used. Yes. In recent years, holograms, pixelgrams, grating images, etc., which are very difficult to duplicate, have been affixed to credit cards, banknotes, etc. to prevent counterfeiting by advanced copier technology. Is also used as a thread. The anti-counterfeit paper in which these threads are engraved cannot be counterfeited because the metallic luster portion of the threads cannot be counterfeited even if copied with a copying machine.
[0005]
However, if the paper layer and the thread are not firmly bonded to each other in the anti-counterfeit paper with the thread, the value of the anti-counterfeit paper may be lost by pulling the thread and the anti-counterfeit paper may be lost. There is a risk of being leaked for the purpose of counterfeiting and alteration.
[0006]
As a means for solving such a problem, for example, a water-soluble adhesive is used in a size press solution in a paper making process, or a thermoplastic resin or a water-soluble material is used in a thread as described in JP-A-7-56377. For example, a method of improving the adhesive strength with a paper layer by applying a functional adhesive. However, sufficient adhesive strength cannot be obtained with a size press liquid, and it is difficult to make paper between paper layers while applying a thermoplastic resin or a water-soluble adhesive to threads.
[0007]
In addition, in the method of using a thread provided with an adhesive layer in advance, before making the thread, the threads that overlap inside the winding may block each other, which may interfere with the production of anti-counterfeit paper. It was difficult to provide an adhesive layer on both sides of the thread. Further, even when an adhesive having excellent blocking resistance is selected, it is difficult to store the thread winding so as not to hinder the use for a long period of time. Incidentally, when a thread having an adhesive layer only on one side is used, there is a disadvantage that the paper layer is lifted from the thread on the side where the adhesive layer is not provided, and the aesthetic appearance of the anti-counterfeit paper is lost.
[0008]
[Problems to be solved by the invention]
The present invention provides a thread for anti-counterfeit paper that is used by being engraved between paper layers, and does not cause blocking even when stored for a long period of time. The present invention also provides forgery prevention paper using the thread.
[0009]
[Means for Solving the Problems]
As a result of earnest research on the adhesive applied to the thread used for manufacturing the anti-counterfeit paper, the present inventors have prevented the thread blocking extremely effectively without reducing the adhesive strength between the thread and the paper layer. The inventors have found what can be done and have completed the present invention.
[0010]
That is, the present invention provides an anti-counterfeit paper in which a thread provided with a thermoplastic and / or water rewet adhesive layer on both sides of a thread-like or tape-like substrate is formed in the paper layer. The anti-counterfeit paper thread is characterized in that at least one of the front and back adhesive layers contains 1 to 15 parts by weight of a soap-free polyethylene wax lubricant with respect to 100 parts by weight of the adhesive.
[0011]
The present invention is also a forgery-preventing paper characterized in that the thread for forgery-preventing paper is formed between paper layers.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The thread of the present invention is produced by applying an adhesive to a wide thread base material, drying it, slitting it to a predetermined width and winding it on a bobbin. It is preferable in terms of efficiency. Therefore, the thread of the present invention is usually stored in a wound state for about 1 week to 6 months until it is used for papermaking of anti-counterfeit paper.
[0013]
Moreover, since the thread | sled used for this invention is preserve | saved in the state of winding, it is necessary for the adhesive layers of an overlapping thread | sled to not raise | generate blocking even under pressurization conditions like the inside of winding.
[0014]
In order to prevent the thread from blocking even during such long-term storage, the present invention significantly improves blocking by including a lubricant in the adhesive layer of the thread and reducing the adhesiveness of the outermost surface of the adhesive. Is.
[0015]
That is, by including a lubricant in advance in at least one of the front and back adhesive layers provided on the thread, the lubricant is unevenly distributed on the surface after the adhesive is applied to the thread, and the adhesion of the outermost surface is reduced. By doing so, blocking of the adhesive layers can be suppressed.
[0016]
The addition amount of the lubricant for preventing the adhesives from blocking each other is 1 to 15 parts by weight, preferably 3 to 10 parts by weight with respect to 100 parts by weight of the adhesive. Incidentally, if the addition amount is less than 1 part by weight, the desired blocking effect of the present invention cannot be obtained, and if it exceeds 15 parts by weight, it is not economically preferable and the adhesive strength with the paper layer is lowered. Therefore, it is not preferable.
[0018]
The or lubricants, preferably for those soap-free type containing no emulsifier does not decrease the bonding strength between the paper layer, further, the polyethylene wax is preferable because particularly excellent effect of blocking resistance.
[0019]
The resin for the thread adhesive used in the present invention is not particularly limited, but acrylic resin, styrene-butadiene resin, styrene-isoprene resin, polyester resin, ethylene-vinyl acetate resin, vinyl acetate-vinyl alcohol. It is a publicly known and publicly used resin composition that can be generally used as a heat seal adhesive, such as an ethylene-based resin, but an ethylene-vinyl acetate resin, a polyester resin, a vinyl chloride-vinyl acetate resin, an olefin resin, an acrylic resin, or An acrylic-styrene resin is particularly preferably used.
[0020]
These resins may be used as an adhesive as they are, or a plurality of resins may be mixed and used. Moreover, you may add adjuvants, such as surfactant, such as various well-known dyes and pigments, an antifoamer, and a wetting agent, an antiblocking agent, and a thickener, as needed.
[0021]
The adhesive is applied by various coating devices such as brush coating, spray coating, roll coater, Meyer bar coater, gravure roll coater, blade coater, air knife coater, etc., and drying is performed by a conventional combination with the above coating device. Done in the way. The coating amount is preferably about 0.5 to 15 g / m 2 in terms of dry weight, but if it is less than this, sufficient adhesion strength cannot be obtained, and if it is more, the adhesion function is saturated, which is not economically preferable.
[0022]
The thread substrate used in the present invention is not particularly limited, but a thin PET film having a thickness of about 10 to 100 μm and excellent in strength is generally used. PET film is subjected to special metal processing such as metal vapor deposition, printing of letters and designs, holograms, grating images, etc. for anti-counterfeiting and decorative purposes, or information is provided by providing a magnetic recording layer. You can also The thread base material is used as a thread by applying an adhesive and slitting it to a predetermined width after drying.
[0023]
The thread obtained in this way is inserted between the paper layers in the making process of a known multi-layer paper machine combining various wire parts, and various surface sizes etc. can be adjusted in the middle of paper making using a size press machine, etc. Apply and dry with a dryer to obtain the desired anti-counterfeit paper. The obtained anti-counterfeit paper may be subjected to machine calendering or super calendering, or may be provided with a pigment coating layer, a thermal recording layer, a thermal transfer image receiving layer, or the like on the surface with various coating apparatuses.
[0024]
The anti-counterfeit paper obtained in the present invention is usually further printed and cut as desired, and is used as a ticket, prepaid card or the like by providing a bill, a gift certificate, or a magnetic recording layer.
[0025]
【Example】
Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited thereto. In the examples, “parts” means “solid weight parts” unless otherwise specified.
[0026]
Example 1
[Production of thread]
As a substrate, an acrylic adhesive (trademark; Nipol LX-814 /) having a glass transition temperature of about 25 ° C. on the PET film surface side of a 12 μm thick aluminum vapor-deposited PET film (trademark; G1302E-12 / manufactured by Diafoil Hoechst). Nippon Zeon Co., Ltd.) is lubricated to 100 parts of a polyester adhesive (trademark; Plus Coat RZ-648 / manufactured by Keno Chemical Co., Ltd.) with a dry weight of 2 g / m 2 and a glass transition temperature of about 32 ° C. on the aluminum deposition surface. As an agent, 10 parts of polyethylene wax (soap free type trademark; slip aid SL-140 / manufactured by San Nopco) was applied and dried with a gravure roll coater so that the dry weight was 3.0 g / m 2 . . Then, after slitting to a width of 1 mm with a micro slitter, it was wound around a bobbin to obtain a thread.
[0027]
[Manufacture of anti-counterfeit paper]
In a circular paper machine equipped with two tank bats, a 1 cm x 1 cm tape was applied in advance at the intervals of 1 cm on the same circumferential surface of the first tank cylinder to close the mesh. As one paper layer, a paper layer having a 1 cm × 1 cm hole was formed every 1 cm. The second tank cylinder was not crafted and a plain second paper layer was formed. In addition, a thread unwinding device is installed between the first and second tank cylinders so that the second paper layer is in contact with the aluminum vapor deposition surface side at the position where the thread overlaps the hole in the first paper layer. It was inserted. The wet paper (water content of about 50%) made by this paper machine is dried with 12 cylinder dryers (surface temperature of about 70 to 100 ° C.) and machine calendered. By using the produced thread, the forgery prevention paper of the type in which the thread was repeatedly exposed and buried on one side was obtained by the paper machine.
[0028]
Example 2
In Example 1, forgery prevention paper was obtained in the same manner as in Example 1 except that the blending amount of polyethylene wax (soap-free type trademark; slip aid SL-140 / San Nopco) was changed to 2 parts.
[0029]
Example 3
In Example 1, forgery prevention paper was obtained in the same manner as in Example 1 except that the amount of water-soluble silicone (soap-free trademark: YF-3842 / manufactured by Toshiba Silicone) was changed to 10 parts in polyethylene wax. It was.
[0030]
Example 4
In Example 1, soap-free lubricant polyethylene wax (trademark: slip aid SL-140 / manufactured by San Nopco) was changed to 10 parts of lubricant polyethylene wax (trademark: Nopcoat PEM-17 / manufactured by San Nopco). Except for the above, forgery prevention paper was obtained in the same manner as in Example 1.
[0031]
Comparative Example 1
In Example 1, forgery prevention paper was obtained in the same manner as in Example 1 except that polyethylene wax as a soap-free lubricant was changed to no blend.
[0032]
Comparative Example 2
Forgery prevention paper was obtained in the same manner as in Example 1 except that the blending amount of polyethylene wax (soap-free type trademark; slip aid SL-140 / manufactured by San Nopco) was changed to 20 parts.
[0033]
"Evaluation"
〔blocking〕
After storing the thread in the wound state for 6 months, the thread was drawn into the paper layer while being unwound, and the ease of feeding the thread was judged based on the following criteria from the visual evaluation and the production status.
A: No blocking is seen in thread winding.
○: Slight blocking is observed in thread winding, but it can be produced without any problem.
Δ: Feeding out is somewhat unstable, and thread breakage occurs during long-time operation.
X: Since blocking is severe and a thread | sled cuts frequently, it is not suitable for manufacture.
[0034]
[Adhesive strength]
The thread of each anti-counterfeit paper thus obtained was peeled off at an angle of 180 ° and a speed of 0.1 m / min, and the adhesive strength with the paper layer was judged according to the following criteria.
A: The adhesive strength of the exposed thread portion is 15 gf / 1 mm or more, and the adhesive strength with the paper layer is extremely excellent.
◯: The adhesive strength of the exposed thread portion is 10 to 15 gf / 1 mm, and can be used without any problem.
Δ: Adhesive strength of the exposed thread portion is 5 to 10 gf / 1 mm, which is somewhat problematic in practical use.
X: The adhesive strength of the exposed thread portion is less than 5 gf / 1 mm, and cannot be used.
[0035]
[Table 1]
【The invention's effect】
As is apparent from the results in Table 1, the thread of the present invention is extremely excellent in blocking resistance, and it is possible to produce anti-counterfeit paper excellent in thread adhesive strength.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02825298A JP3817885B2 (en) | 1998-02-10 | 1998-02-10 | Anti-counterfeiting thread and anti-counterfeiting paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02825298A JP3817885B2 (en) | 1998-02-10 | 1998-02-10 | Anti-counterfeiting thread and anti-counterfeiting paper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11222797A JPH11222797A (en) | 1999-08-17 |
| JP3817885B2 true JP3817885B2 (en) | 2006-09-06 |
Family
ID=12243391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02825298A Expired - Lifetime JP3817885B2 (en) | 1998-02-10 | 1998-02-10 | Anti-counterfeiting thread and anti-counterfeiting paper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3817885B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4843869B2 (en) * | 2001-05-30 | 2011-12-21 | 王子製紙株式会社 | Anti-counterfeiting thread and anti-counterfeiting paper |
| JP4649603B2 (en) * | 2001-06-29 | 2011-03-16 | 独立行政法人 国立印刷局 | Multi-layered paper, its manufacturing method, and multi-layer paper-making apparatus |
-
1998
- 1998-02-10 JP JP02825298A patent/JP3817885B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11222797A (en) | 1999-08-17 |
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