JP3211217B2 - Thermal recording medium - Google Patents
Thermal recording mediumInfo
- Publication number
- JP3211217B2 JP3211217B2 JP32125391A JP32125391A JP3211217B2 JP 3211217 B2 JP3211217 B2 JP 3211217B2 JP 32125391 A JP32125391 A JP 32125391A JP 32125391 A JP32125391 A JP 32125391A JP 3211217 B2 JP3211217 B2 JP 3211217B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- heat
- recording medium
- sensitive
- metal thin
- 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.)
- Expired - Fee Related
Links
Landscapes
- Credit Cards Or The Like (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、プリペイドカード、通
行券、入場券、切符、ファクシミリ用紙、電子計算機ア
ウトプット用紙等の帳票類に用いられ、加熱することに
よって情報記録される感熱記録媒体に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-sensitive recording medium which is used for forms such as prepaid cards, pass tickets, entrance tickets, tickets, facsimile paper, computer output paper and the like, and which records information by heating. Things.
【０００２】[0002]
【従来の技術】従来から、サーマルヘッドやレーザービ
ーム等による熱エネルギーによって化学的又は物理的な
変化を起こさせて文字、図形等の画像情報記録を行う感
熱記録法には、感熱転写リボン等の副資材を用いて記録
層・受像層を有する媒体側にワックス系のインキ層を転
写し画像を記録する方法と、フルオラン系染料などのロ
イコ染料を発色剤とした感熱記録層を媒体側に設けサー
マルヘッド等により直接化学変化を起こさせて印字する
もので、機械側では副資材を必要としない方法との２つ
の方法がある。2. Description of the Related Art Conventionally, a thermal recording method for recording image information such as characters and figures by causing a chemical or physical change by thermal energy from a thermal head or a laser beam or the like includes a thermal transfer ribbon or the like. A method in which a wax-based ink layer is transferred to a medium having a recording layer and an image-receiving layer using an auxiliary material to record an image, and a heat-sensitive recording layer in which a leuco dye such as a fluoran dye is used as a coloring agent is provided in the medium. Printing is performed by causing a chemical change directly by a thermal head or the like, and there are two methods, a method that does not require auxiliary materials on the machine side.
【０００３】前者は、保存性が高くカラー化が容易等の
利点を生かし広く電子計算機のアウトプットやカラープ
リンター等に利用されている。後者は、比較的低温でも
発色する如く熱感度が優れている点と副資材を使用しな
いため低コストであり機械側でのメンテナンスが不要で
あるという利点から、広くファクシミリやワープロの出
力に用いられている。The former is widely used in the output of electronic computers, color printers, etc., taking advantage of the advantages such as high storage stability and easy colorization. The latter is widely used for facsimile and word processor output, because it has excellent thermal sensitivity such that it develops color even at relatively low temperatures and has the advantage of low cost and no maintenance on the machine side because no auxiliary materials are used. ing.
【０００４】しかしながら前者のロイコサーマル法は、
高い熱感度に起因するカブリや圧力によって比較的容易
に発色してしまう等の欠点やアルコールのような極性を
もつ有機溶媒にふれると容易に発色してしまうという欠
点を持っており、耐薬品性、耐光性、耐水性、耐熱性等
の耐環境性については何れも十分満足できるものはな
く、その用途は、一時的な画像情報の記録に限られるの
が現状である。近年、後者の副資材を使用せずに画像情
報を記録するための方法として金属薄膜層を隠蔽層と
し、それを熱によって溶融、破壊することによって隠蔽
性を失わせ可視記録を行う感熱記録媒体が発案され、こ
れにより耐性面においてロイコサーマル法をはるかにし
のぐ耐環境性をしめす感熱記録媒体が利用されるように
なってきた。[0004] However, the former leucothermal method is
It has the disadvantage that it develops color relatively easily due to fog and pressure caused by high thermal sensitivity, and that it easily develops color when it touches a polar organic solvent such as alcohol. However, none of the environmental resistances such as light resistance, water resistance, heat resistance and the like can be sufficiently satisfied, and their use is currently limited to temporary recording of image information. In recent years, as a method for recording image information without using the latter auxiliary material, a metal thin film layer is used as a concealing layer, which is melted and broken by heat, thereby losing concealing properties to perform visible recording by performing visible recording. The use of a heat-sensitive recording medium having environmental resistance far exceeding that of the leucothermal method in terms of resistance has been used.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、この後
者のタイプの感熱記録媒体の場合、金属を溶融させるに
十分な熱エネルギーをかけなければならず、感熱保護層
に大きな負担がかかる。このため、保護層樹脂が破壊さ
れるとサーマルヘッドに大量のカスが着き、スペーシン
グロスをまねくとともに連続印字機能を失い、目的とす
る画像情報を記録できない状態に陥ってしまうという問
題点が発生している。However, in the case of the latter type of heat-sensitive recording medium, sufficient heat energy must be applied to melt the metal, and a heavy load is imposed on the heat-sensitive protective layer. For this reason, when the resin of the protective layer is destroyed, a large amount of scum adheres to the thermal head, causing a loss of spacing, losing the continuous printing function, and causing a state in which the target image information cannot be recorded. are doing.
【０００６】本発明は上記従来技術の課題に鑑みてなさ
れたものであり、金属薄膜層を隠蔽層とし、それを熱に
よって溶融、破壊することによって隠蔽性を失なわせ画
像情報記録を行なう感熱記録媒体において、連続印字特
性、耐環境性及び媒体の生産性の著しく向上した感熱記
録媒体を提供することを目的としている。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has a heat sensitive layer in which a metal thin film layer is used as a concealing layer, which is melted and broken by heat to lose concealing properties and record image information. It is an object of the present invention to provide a recording medium having a continuous printing characteristic, environmental resistance, and significantly improved medium productivity.
【０００７】[0007]
【課題を解決するための手段】本発明者等は前記課題に
鑑みて、鋭意研究の結果、本発明の上記目的は、支持体
の少なくとも一方の面上に、支持体側から順次着色層、
金属薄膜層、感熱増感層及び感熱保護層を有し、前記金
属薄膜層を熱により溶融、破壊して画像情報記録を行う
感熱記録媒体において、前記感熱保護層が最低造膜温度
60℃以上の水系のアクリル系及び／又はスチレン−アク
リル共重合エマルジョン樹脂を主成分として含有するこ
とを特徴とする感熱記録媒体、金属薄膜層と感熱保護層
との間に中間樹脂層を有することを特徴とする感熱記録
媒体、又は着色層が磁性材料で着色されたことを特徴と
する感熱記録媒体を提供することにより達成されること
を見出した。Means for Solving the Problems In view of the above problems, the present inventors have conducted intensive studies, and as a result, the object of the present invention is to form a colored layer on at least one surface of a support in order from the support side,
Metal thin film layer has a heat-sensitive sensitizing layer and the heat-sensitive protective layer, the gold
Performs image information recording by melting and breaking the metal thin film layer with heat
In the heat-sensitive recording medium, the heat-sensitive protective layer has a minimum film forming temperature.
A thermosensitive recording medium characterized by containing an aqueous acrylic and / or styrene-acrylic copolymer emulsion resin of 60 ° C. or higher as a main component, and having an intermediate resin layer between a metal thin film layer and a thermosensitive protective layer. It has been found that this can be achieved by providing a heat-sensitive recording medium characterized by the following, or a heat-sensitive recording medium characterized by coloring a colored layer with a magnetic material.
【０００８】以下に本発明を更に詳細に説明する。Hereinafter, the present invention will be described in more detail.
【０００９】本発明の感熱記録媒体の構成としては支持
体上に必要とする色相を付与した着色層、金属薄膜層、
着色層と金属薄膜層との接着性と加熱時に金属の溶融を
容易にさせる感熱増感層、耐熱性をもちサーマルヘッド
の発熱体（正確には発熱体の保護層）に付着しないため
の感熱保護層を順次積層させた記録媒体が挙げられる。
特に、感熱保護層に最低造膜温度（ＭＦＴ）60℃以上
で、好ましくは平均分子量15万以上、ガラス転移点90℃
以上の水係のアクリル系またはスチレン−アクリル共重
合エマルジョン樹脂を主成分として用いて耐熱性や耐候
性の向上、並びに金属との接着性、塗布・加工適性等の
総合的な特性を向上させた構成を提案するものである。The thermosensitive recording medium of the present invention includes a colored layer having a required hue on a support, a metal thin film layer,
Adhesion between coloring layer and metal thin film layer and melting of metal during heating
A recording medium in which a heat-sensitive sensitizing layer for facilitating the heat-sensitive layer and a heat-sensitive protective layer having heat resistance for preventing the thermal head from being attached to the heating element of the thermal head (more precisely, the protective layer for the heating element) may be used .
In particular, the heat-sensitive protective layer has a minimum film formation temperature (MFT) of 60 ° C. or more, preferably an average molecular weight of 150,000 or more, and a glass transition point of 90 ° C.
Using the water-based acrylic or styrene-acrylic copolymer emulsion resin as the main component, improved heat resistance and weather resistance, and improved overall properties such as adhesion to metal and suitability for coating and processing. It proposes a configuration.
【００１０】図１は、本発明の感熱記録媒体の１実施例
の基本的な構成を示す断面図であり支持体１の上層に順
次着色層２、感熱増感層３、金属薄膜層４及び感熱性保
護層５を形成したものである。FIG. 1 is a sectional view showing a basic structure of one embodiment of a heat-sensitive recording medium of the present invention, in which a colored layer 2, a heat-sensitive sensitizing layer 3, a metal thin film layer 4, The heat-sensitive protective layer 5 is formed.
【００１１】上記支持体１としては、機械的に強靭で柔
軟性や可とう性を有するポリエチレンテレフタレートフ
ィルムやポリカーボネート、ポリ塩化ビニル、その他の
高分子材料からなるプラスチックフィルムや情報記録用
紙・アート紙・コート紙等の紙類、金属板やガラス板等
が必要に応じて用いられる。一般には、厚さ50〜1000μ
m のフィルム状でしかも瞬間的な 250℃以上の高温に耐
えられるような耐熱性のものが感熱記録媒体用の支持体
としては好ましい。The support 1 is a mechanically tough, flexible or flexible polyethylene terephthalate film, a plastic film made of polycarbonate, polyvinyl chloride, or another polymer material, information recording paper, art paper, or the like. Paper such as coated paper, a metal plate, a glass plate, and the like are used as needed. Generally, thickness 50-1000μ
As a support for a thermosensitive recording medium, a film having a heat resistance of at least 250 m.
【００１２】着色層２は、金属調の色相（すなわち光沢
調）からマット調の色相（すなわち白色）等の未記録部
分の色相と区別するための黒、藍、赤、その他の色相を
該支持体に付与する層である。着色層２はグラビアイン
キ、オフセットインキ、スクリーンインキ、各種コーテ
ィング用塗料等を直接印刷・コーティングしたり、転写
箔やラミネートの形で支持体上に貼り合わせたりして付
与することができる。The colored layer 2 supports black, indigo, red, and other hues for distinguishing from unrecorded hues such as a metallic hue (ie, glossy) to a matte hue (ie, white). It is a layer applied to the body. The coloring layer 2 can be applied by directly printing and coating gravure ink, offset ink, screen ink, various coating paints, or the like, or pasting it on a support in the form of a transfer foil or laminate.
【００１３】感熱増感層３は、着色層２と金属薄膜層４
とを接着させ、しかも金属薄膜層の熱破壊を容易にする
ことを目的とした感熱増感機能を有する層であり、ポリ
エステル樹脂、ポリ塩化ビニル樹脂、塩化ビニル−酢酸
ビニル共重合体、ポリビニルブチラール樹脂、ポリメチ
ルメタアクリレート（ＰＭＭＡ）、ポリウレタン樹脂、
エポキシ樹脂等の樹脂を主成分とする中間層である。感
度を向上させる目的においては、一般的に熱可塑性樹脂
を使用することが好ましいが、該感熱増感層より上方に
積み重ねられる層すなわち金属薄膜層４と感熱性保護層
５の加工上の問題や完成した感熱記録媒体の耐溶剤性や
耐薬品性の問題から可塑剤の添加量やイソシアネート等
の硬化剤の添加量を設計思想に基づいて調整しながら添
加するのがよい。The heat-sensitive sensitizing layer 3 comprises a colored layer 2 and a metal thin-film layer 4.
And a layer having a heat-sensitizing function for the purpose of facilitating thermal destruction of the metal thin-film layer.Polyester resin, polyvinyl chloride resin, vinyl chloride-vinyl acetate copolymer, polyvinyl butyral Resin, polymethyl methacrylate (PMMA), polyurethane resin,
An intermediate layer mainly composed of a resin such as an epoxy resin. For the purpose of improving the sensitivity, it is generally preferable to use a thermoplastic resin. However, there is a problem in processing the layers stacked above the heat-sensitized layer, that is, the metal thin film layer 4 and the heat-sensitive protective layer 5, From the viewpoint of the solvent resistance and chemical resistance of the completed heat-sensitive recording medium, it is preferable to add the plasticizer and the curing agent such as isocyanate while adjusting the addition amount based on the design concept.
【００１４】金属薄膜層４としては、Ｓｎ、Ｔｅ、Ｉ
ｎ、Ａｌ、Ｂｉ、Ｚｎ、Ｐｂ等の金属単体あるいはこれ
らの金属の合金、化合物を真空蒸着、スパッタリング、
メッキ、転写、ラミネート等の方法によって形成するこ
とができるが、サーマルヘッド等の熱で容易に溶融させ
るためには、融点が低い方が有利であり、特にＳｎ単体
またはＳｎの合金が使用上好ましい材料である。この金
属薄膜層の厚さは 100〜5000Å程度で記録機能を有する
ものが使用できるが、薄すぎても厚すぎても印字感度は
低下するため好ましくは 500〜1500Åである。As the metal thin film layer 4, Sn, Te, I
n, Al, Bi, Zn, Pb, etc. or a metal or alloy or compound of these metals by vacuum evaporation, sputtering,
Although it can be formed by a method such as plating, transfer, lamination, etc., in order to be easily melted by heat of a thermal head or the like, a lower melting point is advantageous, and in particular, Sn alone or an alloy of Sn is preferable in use. Material. The thickness of the metal thin film layer is about 100 to 5000 ° and has a recording function. However, if the thickness is too thin or too thick, the printing sensitivity is reduced, so that it is preferably 500 to 1500 °.
【００１５】感熱保護層５は、本発明の感熱記録媒体の
最も特徴的な部分であり、好ましくは水系のアクリル系
エマルジョンもしくはスチレン−アクリル共重合エマル
ジョンでしかも耐熱性を考慮し最低造膜温度（ＭＦＴ）
が60℃以上で、さらに好ましくは平均分子量15万以上、
又はガラス転移点（Ｔｇ）が90℃以上のものを主成分と
して用いたもので、グラビアコーティングやリバースロ
ールコーティング、ナイフコーティング、ブレードコー
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。一般に、水性の塗工材料は溶剤系塗工材料
に比べて、取り扱いの容易さ・安全性の点で有利であ
り、特にエマルジョン系は塗料が低粘度となるため塗布
・加工適性上で有利であり、コーティング剤や接着剤と
して各種紙加工や各種建装材料、産業資材等に様々な形
で利用されている。本発明において上記のようなアクリ
ル系又はスチレン−アクリル系のエマルジョンを用いる
のは、安定した大きな分子量をもつ粒子を用いることに
よって、塗膜の物理的な強度を与えることができるから
である。また、ガラス転移点や最低造膜温度（ＭＦＴ）
の高いものを用いることによって塗膜に耐熱性を与える
ものである。さらに、水系であるための特徴としては、
このような感熱保護層に必ず必要とされているワックス
等の滑剤の選択の幅が広がり、現在知られているあらゆ
るワックスエマルジョンが使用可能であり、記録媒体の
用途に合わせて選択できる。滑剤には、シリコン系、ス
テアリン酸亜鉛等の金属石鹸、フッ素系等のものも使用
できるが、耐摩擦性と加熱時の塗膜保護性や滑り性能の
点からワックス系の滑剤を用いるのが好ましい。本発明
においては融点が30〜 150℃の範囲のパラフィンワック
ス、マイクロクリスタリンワックス、カルナバワック
ス、ライスワックス、モンタンワックス、低分子ポリエ
チレンワックス、酸化ポリエチレンワックス、低分子ポ
リプロピレンワックス、各種脂肪酸、モノアマイド系、
ビスアマイド系、牛脂系等の各種天然及び合成ワックス
を単独もしくは混合系で添加することができるが、これ
らワックスのうちの多くは水系エマルジョンの形態をと
りやすく、保護層塗料用の添加剤としてエマルジョン同
士の混合は極めて容易にできるため、塗料の製造に有利
である。The heat-sensitive protective layer 5 is the most characteristic part of the heat-sensitive recording medium of the present invention, and is preferably an aqueous acrylic emulsion or a styrene-acryl copolymer emulsion, and has a minimum film forming temperature ( MFT)
At 60 ° C. or higher, more preferably an average molecular weight of 150,000 or higher,
Alternatively, a material having a glass transition point (Tg) of 90 ° C. or higher is used as a main component. Various coating methods such as gravure coating, reverse roll coating, knife coating, and blade coating, and printing methods such as gravure printing and screen printing are used. It is provided with a film thickness of about 1 to 10 μm. In general, water-based coating materials are more advantageous in terms of ease of handling and safety than solvent-based coating materials, and emulsion-based coating materials are particularly advantageous in terms of coating and processing suitability because the coating has a low viscosity. It is used as a coating agent and an adhesive in various forms for various paper processing, various building materials, industrial materials, and the like. In the present invention, the acrylic or styrene-acrylic emulsion as described above is used because the physical strength of the coating film can be given by using stable particles having a large molecular weight. In addition, glass transition point and minimum film formation temperature (MFT)
By using a material having a high heat resistance, the coating film is given heat resistance. Furthermore, as a feature of being water-based,
The range of choice of lubricants such as wax, which is always required for such a heat-sensitive protective layer, is expanded, and any wax emulsion currently known can be used, and can be selected according to the use of the recording medium. As the lubricant, silicon-based, metal soap such as zinc stearate, fluorine-based, and the like can be used, but wax-based lubricant is preferably used from the viewpoint of friction resistance, coating film protection during heating, and sliding performance. preferable. In the present invention, a paraffin wax having a melting point in the range of 30 to 150 ° C., microcrystalline wax, carnauba wax, rice wax, montan wax, low-molecular polyethylene wax, oxidized polyethylene wax, low-molecular polypropylene wax, various fatty acids, monoamides,
Various natural and synthetic waxes such as bisamide and tallow can be added alone or in a mixed system, but most of these waxes are easily formed into an aqueous emulsion, and the emulsions are used as additives for protective layer paints. Can be mixed very easily, which is advantageous for the production of paint.
【００１６】本発明において、最低造膜温度（ＭＦＴ）
とは、エマルジョン塗膜が乾燥した後、一様な連続皮膜
になる最低温度を意味するもので、ＭＦＴ以下の温度で
は白濁した膜しか得られない。In the present invention, the minimum film formation temperature (MFT)
The term means the minimum temperature at which the emulsion coating film becomes a uniform continuous film after drying. At a temperature lower than the MFT, only a cloudy film can be obtained.
【００１７】また、本発明の感熱記録媒体には金属薄膜
層と感熱保護層の間に耐酸性や耐アルカリ性の向上のた
めに中間樹脂層を有することが好ましい。このような中
間樹脂層は例えばポリエステル、塩酢ビ系樹脂等からな
り、グラビア法、リバースロール法、ブレード法等によ
り 0.5〜 2.0μm の厚みで設けられる。Further, the heat-sensitive recording medium of the present invention preferably has an intermediate resin layer between the metal thin film layer and the heat-sensitive protective layer for improving acid resistance and alkali resistance. Such an intermediate resin layer is made of, for example, polyester, polyvinyl chloride-based resin, or the like, and is provided with a thickness of 0.5 to 2.0 μm by a gravure method, a reverse roll method, a blade method, or the like.
【００１８】本発明に用いられる画像情報記録方法とし
ては例えばサーマルヘッドによる加熱による印字方法等
がある。The image information recording method used in the present invention includes, for example, a printing method by heating with a thermal head.
【００１９】[0019]
【作用】本発明による感熱記録媒体は、金属薄膜を有す
る熱破壊型の記録媒体において、本発明の層構成を有
し、尚かつその保護層の主成分となる樹脂材料として水
系のアクリル系もしくはスチレン−アクリル系エマルジ
ョンを用いたことによって、保護層の耐熱性を十分考慮
した点と保護層塗料中のワックスや顔料等の添加剤の選
択を容易にし、又、良好な塗布・加工適性をもつ材料系
によって、連続印字適性と耐性をもつことが可能とな
り、従来のＵＶ硬化型のアクリル系樹脂や溶剤系の蒸発
乾燥型や２液反応型の耐熱樹脂による保護層を用いた感
熱記録媒体に比べ機能的に上回るものが得られる。The heat-sensitive recording medium according to the present invention is a heat-destructible recording medium having a metal thin film, which has a layer structure according to the present invention, and has a water-based acrylic or a resin as a main component of the protective layer. The use of styrene-acrylic emulsion facilitates the selection of additives such as wax and pigment in the protective layer paint, taking into account the heat resistance of the protective layer, and has good coating and processing suitability. Depending on the material system, it is possible to have continuous printing suitability and durability, and it can be used for thermal recording media using a protective layer made of conventional UV-curable acrylic resin, solvent-based evaporative drying type, or two-component reaction type heat-resistant resin. A functionally superior product is obtained.
【００２０】[0020]
【実施例】以下、本発明について実施例を挙げて詳しく
述べる。EXAMPLES Hereinafter, the present invention will be described in detail with reference to examples.
【００２１】実施例１ 本発明の感熱記録媒体の実施例１として図１に示す構成
のものを以下に説明する。Embodiment 1 A thermosensitive recording medium according to the present invention having a structure shown in FIG. 1 will be described below as Embodiment 1 of the present invention.
【００２２】厚さ 188μm の乳白色のポリエチレンテレ
フタレートフィルムからなる支持体１上に以下の層構成
からなる感熱記録媒体を形成した。A thermosensitive recording medium having the following layer structure was formed on a support 1 made of a milky white polyethylene terephthalate film having a thickness of 188 μm.
【００２３】着色層２としては、下記組成の着色塗料を
グラビア法により、乾燥温度 110℃、塗布厚３μm で塗
布した。 As the coloring layer 2, a coloring paint having the following composition was applied by a gravure method at a drying temperature of 110 ° C. and a coating thickness of 3 μm.
【００２４】感熱増感層３として、下記組成の樹脂塗料
をグラビア法によって、乾燥温度 110℃、塗布厚 1.5μ
m で塗布した。 As the heat-sensitive layer 3, a resin coating having the following composition was dried by a gravure method at a drying temperature of 110 ° C. and a coating thickness of 1.5 μm.
m.
【００２５】金属薄膜層４として、真空蒸着法によって
Ｓｎの表面上の抵抗率が１Ω／口になるような管理方法
で膜厚約1000Åの隠蔽層を形成した。As the metal thin film layer 4, a concealing layer having a thickness of about 1000 ° was formed by a vacuum deposition method by a control method such that the resistivity on the surface of Sn was 1 Ω / port.
【００２６】感熱保護層５として、下記組成のエマルジ
ョン塗料をグラビア法によって、乾燥温度 120℃、塗布
厚 1.5μm で塗布した。 As the heat-sensitive protective layer 5, an emulsion paint having the following composition was applied by a gravure method at a drying temperature of 120 ° C. and a coating thickness of 1.5 μm.
【００２７】比較例１ 実施例１において感熱性保護層５として下記の組成の溶
剤可溶型樹脂を用いて、乾燥温度 110℃、塗布厚 1.5μ
m で塗布した。 Comparative Example 1 In Example 1, a solvent-soluble resin having the following composition was used as the heat-sensitive protective layer 5 at a drying temperature of 110 ° C. and a coating thickness of 1.5 μm.
m.
【００２８】実施例２ 本発明の感熱記録媒体の実施例２として図２に示す構成
のものを以下に説明する。Embodiment 2 A thermosensitive recording medium of the present invention having the structure shown in FIG. 2 will be described below as Embodiment 2 of the present invention.
【００２９】厚さ 200μm の白色合成紙のユポＦＰＧ 2
00（王子由化合成紙製）からなる支持体１上に以下の層
構成からなる感熱記録媒体を形成した。Yupo FPG 2 of 200 μm thick white synthetic paper
A thermosensitive recording medium having the following layer constitution was formed on a support 1 made of 00 (made by Oji Yuka Synthetic Paper).
【００３０】着色層２としては、実施例１と同様の材料
を用いて、３μm の着色層を形成した。As the colored layer 2, a 3 μm colored layer was formed using the same material as in Example 1.
【００３１】感熱増感層３としては、下記樹脂塗料をグ
ラビア法によって、乾燥温度 110℃、塗布厚 1.5μm で
塗布したのち、60℃、48時間エージングを行った。 As the heat-sensitive sensitizing layer 3, the following resin coating was applied by a gravure method at a drying temperature of 110 ° C. and a coating thickness of 1.5 μm, and then aged at 60 ° C. for 48 hours.
【００３２】金属薄膜層４として、実施例１と同様にＳ
ｎの薄膜層を形成した。As the metal thin film layer 4, S
n thin film layers were formed.
【００３３】中間樹脂層６として、下記組成の樹脂塗料
をグラビア法によって、乾燥温度 110℃、塗布厚 1.0μ
m で塗布した。 As the intermediate resin layer 6, a resin paint having the following composition was dried by a gravure method at a drying temperature of 110 ° C. and a coating thickness of 1.0 μm.
m.
【００３４】感熱保護層５として、下記組成のエマルジ
ョン塗料をグラビア法によって、乾燥温度 120℃、塗布
厚 1.0μm で塗布した。 As a heat-sensitive protective layer 5, an emulsion paint having the following composition was applied by a gravure method at a drying temperature of 120 ° C. and a coating thickness of 1.0 μm.
【００３５】比較例２ 実施例２におけると同様の基体１、着色層２、感熱増感
層３及び金属薄膜層４を設けた後に、耐熱性保護層５と
して下記組成の紫外線硬化型樹脂を主成分として用い、
塗布厚 1.5μm で塗布して、 110℃で乾燥した後、160m
Ｗ／cmの空冷水銀紫外線ランプによって硬化させて感熱
記録媒体を得た。 Comparative Example 2 After providing the same base 1, colored layer 2, heat-sensitive sensitizing layer 3 and metal thin film layer 4 as in Example 2, the heat-resistant protective layer 5 was mainly composed of an ultraviolet-curable resin having the following composition. Used as an ingredient,
After applying at a coating thickness of 1.5 μm and drying at 110 ° C,
The composition was cured by a W / cm air-cooled mercury ultraviolet lamp to obtain a thermosensitive recording medium.
【００３６】実施例３ 本発明の感熱記録媒体の実施例３として図３に示す構成
のものを以下に説明する。Embodiment 3 A thermosensitive recording medium according to Embodiment 3 of the present invention having the structure shown in FIG. 3 will be described below.
【００３７】厚さ 188μm の乳白色のポリエチレンテレ
フタレートフィルムからなる支持体１上に以下の層構成
からなる感熱記録媒体を形成した。A thermosensitive recording medium having the following layer structure was formed on a support 1 made of a milky white polyethylene terephthalate film having a thickness of 188 μm.
【００３８】着色層２としては、下記組成の着色磁気塗
料をグラビア法により、塗布厚12μm で塗布し、約3000
ガウスの水平磁界中で磁場配向をかけた後に、乾燥温度
110℃で約３分間乾燥させた。 As the colored layer 2, a colored magnetic paint having the following composition is applied by a gravure method to a coating thickness of 12 μm,
After applying a magnetic field orientation in a Gaussian horizontal magnetic field, the drying temperature
Dry at 110 ° C. for about 3 minutes.
【００３９】感熱増感層３として、下記樹脂塗料をグラ
ビア法によって、乾燥温度 110℃、塗布厚 1.5μm で塗
布した。 As the heat-sensitive sensitizing layer 3, the following resin paint was applied by a gravure method at a drying temperature of 110 ° C. and a coating thickness of 1.5 μm.
【００４０】金属薄膜層４として、真空蒸着法によって
Ｓｎの表面上の抵抗率が 0.7Ω／口になるような管理方
法で膜厚約1500Åの隠蔽層を形成した。As the metal thin film layer 4, a concealing layer having a thickness of about 1500 ° was formed by a vacuum evaporation method by a control method such that the resistivity on the surface of Sn was 0.7Ω / port.
【００４１】感熱保護層５として、下記組成のエマルジ
ョン塗料をグラビア法によって、乾燥温度 120℃、塗布
厚 1.5μm で塗布した。 As the heat-sensitive protective layer 5, an emulsion paint having the following composition was applied by a gravure method at a drying temperature of 120 ° C. and a coating thickness of 1.5 μm.
【００４２】上記実施例１，２，３及び比較例１，２に
よって製造された感熱記録媒体を以下に示すような方法
で評価を行った結果を表１に示す。Table 1 shows the evaluation results of the thermal recording media manufactured in Examples 1, 2, 3 and Comparative Examples 1 and 2 by the following method.
【００４３】（１）連続印字特性 サーマルヘッドにより、パルス幅５ｍsec 、印字エネル
ギー1.1mＪ／ドット、瞬間表面温度 280℃の条件で40ｇ
／cmの圧力をかけて印字したときの連続印字が可能（す
なわちカスレが発生するまでの）な印字量による判定。 ○：５０００パス以上 △：３０００パス程度(1) Continuous printing characteristics 40 g under the conditions of a pulse width of 5 msec, a printing energy of 1.1 mJ / dot, and an instantaneous surface temperature of 280 ° C., using a thermal head.
Judgment based on the amount of printing that enables continuous printing when printing is performed with a pressure of / cm (that is, until blurring occurs). ○: 5000 passes or more △: About 3000 passes
【００４４】（２）コントラスト（視認性） 上記印字条件で印字した場合の、印字濃度と地肌濃度の
差（ΔＯＤ）で評価した。 ○：０．９以上 ×：０．７以下(2) Contrast (Visibility) Evaluation was made based on the difference (ΔOD) between the print density and the background density when printing was performed under the above printing conditions. ：: 0.9 or more ×: 0.7 or less
【００４５】（３）耐酸性 ５％の酢酸に６時間浸漬させ、金属薄膜の腐食や樹脂層
の分解等による地肌濃度変化を観察した。 ○：全く腐食されない △：やや腐食される（１mmφ以下のスポット抜けが２０
個以下）(3) Acid resistance The substrate was immersed in 5% acetic acid for 6 hours, and changes in background density due to corrosion of the metal thin film and decomposition of the resin layer were observed. ：: Not corroded at all △: Slightly corroded (20 spots less than 1 mmφ
Or less)
【００４６】（４）耐アルカリ性 ５％炭酸ナトリウム水溶液に６時間浸漬させ、金属薄膜
の腐食や樹脂層の分解等による地肌濃度変化を観察し
た。○は腐食されないものを表わす。(4) Alkali Resistance The substrate was immersed in a 5% aqueous solution of sodium carbonate for 6 hours, and changes in the background density due to corrosion of the metal thin film and decomposition of the resin layer were observed. ○ indicates that it is not corroded.
【００４７】（５）耐塩水性 ５％食塩水に５日間浸漬させ、金属薄膜の腐食や樹脂層
の分解等による地肌濃度変化を観察した。 ○：全く腐食されない ×：腐食される（１mmφ以上の抜けが２０個以上）(5) Salt water resistance The sample was immersed in a 5% saline solution for 5 days, and changes in background density due to corrosion of the metal thin film and decomposition of the resin layer were observed. ：: Not corroded at all ×: Corroded (20 holes or more with 1 mmφ or more)
【００４８】本発明の実施例は、特に連続印字特性を考
慮したものであり、表１に示すように、比較例に比べて
５倍以上の連続印字が可能であった。また比較例１は熱
可塑性樹脂上の金属蒸着面上に有機溶剤系の保護層用塗
料を塗布した際に溶剤の浸透がひどく、地肌濃度が高く
なりコントラストの低下をまねいた。また、比較例２は
保護層に紫外線硬化型塗料を用いたが、ピンホールや塗
膜欠陥が多く、耐性面で満足できなかった。In the examples of the present invention, continuous printing characteristics were particularly taken into consideration. As shown in Table 1, continuous printing was possible at least 5 times as compared with the comparative example. Further, in Comparative Example 1, when an organic solvent-based coating material for a protective layer was applied on the metal-deposited surface on the thermoplastic resin, the penetration of the solvent was severe, the background density was increased, and the contrast was lowered. In Comparative Example 2, an ultraviolet-curable coating material was used for the protective layer, but there were many pinholes and coating film defects, and the durability was not satisfactory.
【００４９】[0049]
【表１】 [Table 1]
【００５０】[0050]
【発明の効果】本発明によって製造された感熱記録媒体
は、通常の保管や携帯において充分な耐候性を保持しな
がら、サーマルヘッド等による印字の際に保護層が充分
な耐熱性・耐候性を持っており、連続印字が可能で、機
械のメンテナンスを極力少なくすることが可能であり、
しかもエマルジョン塗料を用いることによる安全性や材
料コスト、収率等の生産上のメリットも有する。The thermal recording medium manufactured according to the present invention has sufficient heat resistance and weather resistance during printing with a thermal head or the like, while maintaining sufficient weather resistance in ordinary storage or carrying. And continuous printing is possible, minimizing machine maintenance.
In addition, the use of emulsion paints has production advantages such as safety, material cost, and yield.
【図１】実施例１の本発明の感熱記録媒体の基本的構成
を示す断面図。FIG. 1 is a cross-sectional view showing a basic configuration of a thermosensitive recording medium according to the present invention of Example 1.
【図２】実施例２の本発明の感熱記録媒体の基本的構成
を示す断面図。FIG. 2 is a cross-sectional view illustrating a basic configuration of a thermosensitive recording medium according to a second embodiment of the present invention.
【図３】実施例３の本発明の感熱記録媒体の基本的構成
を示す断面図。FIG. 3 is a sectional view showing a basic configuration of a thermosensitive recording medium according to the present invention of Example 3.
１ 支持体 ２ 着色層 ２′磁気着色層 ３ 感熱増感層 ４ 金属薄膜層 ５ 感熱保護層 ６ 中間樹脂層 Reference Signs List 1 support 2 colored layer 2 'magnetic colored layer 3 heat-sensitive sensitizing layer 4 metal thin film layer 5 heat-sensitive protective layer 6 intermediate resin layer
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平１−214488（ＪＰ，Ａ) 特開 平１−214489（ＪＰ，Ａ) 実開 平３−70977（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B42D 15/00 301 - 15/10 551 B41M 5/40 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-1-214488 (JP, A) JP-A 1-214489 (JP, A) JP-A-3-70977 (JP, U) (58) Survey Field (Int.Cl. 7 , DB name) B42D 15/00 301-15/10 551 B41M 5/40
Claims (3)
体側から順次着色層、金属薄膜層、感熱増感層及び感熱
保護層を有し、前記金属薄膜層を熱により溶融、破壊し
て画像情報記録を行う感熱記録媒体において、前記感熱
保護層が最低造膜温度60℃以上の水系のアクリル系及び
／又はスチレン−アクリル共重合エマルジョン樹脂を主
成分として含有することを特徴とする感熱記録媒体。A colored layer, a metal thin film layer, a heat-sensitive sensitizing layer, and a heat-sensitive protective layer are sequentially formed on at least one surface of the support from the support side, and the metal thin film layer is melted and broken by heat.
In the thermosensitive recording medium to perform image recording Te, the heat-sensitive protective layer is minimum film temperature 60 ° C. or more aqueous acrylic and / or styrene - thermal, characterized in that it contains as a main component an acrylic copolymer emulsion resin recoding media.
脂層を有することを特徴とする請求項１記載の感熱記録
媒体。2. The heat-sensitive recording medium according to claim 1, further comprising an intermediate resin layer between the metal thin film layer and the heat-sensitive protective layer.
徴とする請求項１記載の感熱記録媒体。3. The thermosensitive recording medium according to claim 1, wherein the coloring layer is colored with a magnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32125391A JP3211217B2 (en) | 1991-11-08 | 1991-11-08 | Thermal recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32125391A JP3211217B2 (en) | 1991-11-08 | 1991-11-08 | Thermal recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05131786A JPH05131786A (en) | 1993-05-28 |
| JP3211217B2 true JP3211217B2 (en) | 2001-09-25 |
Family
ID=18130518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32125391A Expired - Fee Related JP3211217B2 (en) | 1991-11-08 | 1991-11-08 | Thermal recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3211217B2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01214488A (en) * | 1988-02-22 | 1989-08-28 | Dainippon Printing Co Ltd | Card body |
| JPH01214489A (en) * | 1988-02-22 | 1989-08-28 | Dainippon Printing Co Ltd | Card body |
| JPH0370977U (en) * | 1989-07-06 | 1991-07-17 |
-
1991
- 1991-11-08 JP JP32125391A patent/JP3211217B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05131786A (en) | 1993-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4623580A (en) | Thermal transfer recording medium | |
| US5019452A (en) | Thermal transfer material | |
| WO2018159698A1 (en) | Heat-sensitive transfer recording medium | |
| EP1642743B1 (en) | Low energy thermal transfer recording medium and method | |
| US6514646B1 (en) | Balanced architecture for adhesive image media | |
| JP3211217B2 (en) | Thermal recording medium | |
| JPH08258415A (en) | Thermosensible recording medium | |
| US4833021A (en) | Non-impact electrothermic recording material | |
| JP2722466B2 (en) | Thermal transfer recording material | |
| US4774128A (en) | Thermal transfer recording medium | |
| JPH0890915A (en) | Thermal recording medium | |
| JP3218656B2 (en) | Thermal recording medium | |
| JPH08234665A (en) | Transparent adhesive label and thermal-transfer ribbon-integrated transparent adhesive label | |
| JPH07266725A (en) | Thermal recording medium | |
| JPH06255242A (en) | Bat sensitive recording medium | |
| JP2592805B2 (en) | Matte thermal transfer media | |
| JP2995066B2 (en) | Ink ribbon for thermal transfer recording | |
| JPH05229249A (en) | Thermosensitive recording medium | |
| JP2741469B2 (en) | Thermal recording medium | |
| JP4416065B2 (en) | Thermal recording medium | |
| JP2726928B2 (en) | Resin-type thermal transfer recording material | |
| JPH06106844A (en) | Heat-sensitive recording medium | |
| JPH0776178A (en) | Thermal transfer sheet | |
| JP2620266B2 (en) | Thermal transfer media | |
| JPH05229272A (en) | Thermal transfer material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080719 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090719 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100719 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110719 Year of fee payment: 10 |
|
| LAPS | Cancellation because of no payment of annual fees |