JPH05155148A - Reversible thermal recording medium and recording method thereof - Google Patents
Reversible thermal recording medium and recording method thereofInfo
- Publication number
- JPH05155148A JPH05155148A JP34983891A JP34983891A JPH05155148A JP H05155148 A JPH05155148 A JP H05155148A JP 34983891 A JP34983891 A JP 34983891A JP 34983891 A JP34983891 A JP 34983891A JP H05155148 A JPH05155148 A JP H05155148A
- Authority
- JP
- Japan
- Prior art keywords
- reversible thermosensitive
- thermosensitive recording
- layer
- recording medium
- recording layer
- 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
Landscapes
- Heat Sensitive Colour Forming Recording (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、加熱により可逆的に画
像を記録、消去することが可能な可逆性感熱記録媒体及
びその記録方法に関するものであり、ファクシミリ、プ
リンター、カード、ラベル、表示体への応用が可能であ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reversible thermosensitive recording medium capable of reversibly recording and erasing an image by heating and a recording method therefor, such as facsimile, printer, card, label and display. Can be applied to.
【０００２】[0002]
【従来の技術】近年、新たな記録材料として、加熱温度
の違いにより画像の記録、消去を可逆的に行うことがで
き、かつ室温において画像の定着性を有するものが提案
されている。（特開昭５５−１５４１９８号、特開昭６
１−２５７８８３号、特開昭６３−３９３７７号参
照。）該記録材料の記録の原理は、可逆性感熱記録層の
温度による透明度の変化を利用したもので、図７により
この原理を説明すれば、有機高分子樹脂中に分散された
有機低分子物質を主成分とする可逆性感熱記録層は、予
めＴ3以上の温度に加熱しその後Ｔ0以下の温度に冷却す
れば不透明化（白濁）状態で定着する。不透明化した可
逆性感熱記録層をＴ1〜Ｔ2の温度まで加熱すると→
→の経路を経て最大透明度に達し、この状態から冷却
すると→を経て透明状態で定着する。透明化した可
逆性感熱記録層をＴ3以上の温度に加熱すると、→
→を経て最大透明度よりやや不透明化した状態に達
し、その状態から冷却すると→を経て不透明状態で
定着する。2. Description of the Related Art In recent years, as a new recording material, there has been proposed a recording material capable of reversibly recording and erasing an image by a difference in heating temperature and having an image fixing property at room temperature. (JP-A 55-154198, JP-A 6-
See 1-257883 and JP-A-63-39377. ) The recording principle of the recording material utilizes the change in transparency depending on the temperature of the reversible thermosensitive recording layer. The principle of the recording will be explained with reference to FIG. 7. An organic low-molecular substance dispersed in an organic polymer resin is described below. The reversible thermosensitive recording layer containing as a main component is fixed in an opaque (white turbid) state by previously heating to a temperature of T 3 or higher and then cooling to a temperature of T 0 or lower. Heating the opaque reversible thermosensitive recording layer to a temperature of T 1 to T 2 →
The maximum transparency is reached via the → route, and when cooled from this state, the transparent state is fixed via →. When the transparent reversible thermosensitive recording layer is heated to a temperature of T 3 or higher, →
After →, it reaches a state in which it becomes slightly opaque than the maximum transparency, and when cooled from that state, it becomes fixed in an opaque state via →.
【０００３】該記録材料は、ガラス板、ポリエステルフ
ィルム、塩ビフィルム、ナイロンフィルム等の透明支持
体上や着色または金属蒸着した支持体上に可逆性感熱記
録層を設けたものである。この可逆性感熱記録層は、ポ
リエステル樹脂あるいは塩化ビニル系樹脂等の有機高分
子樹脂中に、ベヘン酸、ステアリン酸メチル、ベヘン酸
ドコシル等の高級脂肪酸またはその誘導体等の有機低分
子物質を微小な分散状態で存在させており、これが温度
による透明度の変化をもたらすのである。従来この記録
材料へ、画像情報を印字または消去させるために部分的
または全面に熱履歴を与えて透明部と不透明部とを形成
させる方法として熱ロールや感熱ヘッドが使用されてき
た。しかし、熱ロール定着方式では、熱ロールを常に一
定温度に保つことが難しく、また記録材料以外へ熱が放
射されてエネルギーの面からも無駄が多い。一方、感熱
ヘッドを使用する場合はエネルギーのロスは少ないが、
広い面積を加熱するには時間がかかり過ぎるという問題
があった。The recording material has a reversible thermosensitive recording layer provided on a transparent support such as a glass plate, a polyester film, a vinyl chloride film, a nylon film or a support which is colored or metal-deposited. This reversible thermosensitive recording layer contains organic high molecular weight substances such as behenic acid, methyl stearate, docosyl behenate and higher fatty acids or their derivatives in organic high molecular weight resin such as polyester resin or vinyl chloride resin. It exists in a dispersed state, which causes a change in transparency with temperature. Conventionally, a heat roll or a heat sensitive head has been used as a method for forming a transparent portion and an opaque portion by giving a heat history to a part or the whole surface of this recording material in order to print or erase image information. However, in the heat roll fixing method, it is difficult to always keep the heat roll at a constant temperature, and heat is radiated to other than the recording material, which is wasteful in terms of energy. On the other hand, when using a thermal head, there is little energy loss,
There is a problem that it takes too much time to heat a large area.
【０００４】[0004]
【発明が解決しようとする課題】本発明は上記の従来技
術の問題点を解決し、エネルギーのロスが少なく効率的
に加熱することができる新規な加熱手段を取り入れて記
録、消去が可能な可逆性感熱記録媒体と、その記録方法
を提供することにある。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art and incorporates a novel heating means capable of efficiently heating with less energy loss, which is reversible for recording and erasing. It is to provide a heat-sensitive recording medium and a recording method thereof.
【０００５】[0005]
【課題を解決するための手段】本発明者等は、可逆性感
熱記録媒体の層構成に通電により発熱する層を設けるこ
とにより、上記の目的を達成することができることを見
い出し、本発明に達成するに至った。すなわち、本発明
の第１の可逆性感熱記録媒体は、少なくとも基体、可逆
性感熱記録層及び通電発熱層からなることを特徴とし、
又、第２の可逆性感熱記録媒体は、少なくとも通電によ
り発熱する基体、及び可逆性感熱記録層からなることを
特徴とする可逆性感熱記録媒体である。The inventors of the present invention have found that the above object can be achieved by providing a layer structure of a reversible thermosensitive recording medium with a layer which generates heat upon energization, and achieved the present invention. Came to do. That is, the first reversible thermosensitive recording medium of the present invention is characterized by comprising at least a substrate, a reversible thermosensitive recording layer, and an electric heating layer,
The second reversible thermosensitive recording medium is a reversible thermosensitive recording medium characterized by comprising at least a substrate that generates heat when energized and a reversible thermosensitive recording layer.
【０００６】次に、本発明の可逆性感熱記録媒体の一例
を図１ないし図４に示す模式的断面図を参酌して説明す
る。図１では、基体２の一方の面上に可逆性感熱記録層
３が設けられ、他方の面上に通電発熱層１が設けられて
いる。図２では基体２の面上に可逆性感熱記録層３が設
けられ、その上に通電発熱層１が積層して設けられてい
る。図３では基体２の面上に通電発熱層１が設けられ、
その上に可逆性感熱記録層３が積層して設けられてい
る。また、図４では通電により発熱する基体４の面上に
可逆性感熱記録層３が設けられているものである。Next, an example of the reversible thermosensitive recording medium of the present invention will be described with reference to the schematic sectional views shown in FIGS. In FIG. 1, the reversible thermosensitive recording layer 3 is provided on one surface of the substrate 2, and the electric heating layer 1 is provided on the other surface. In FIG. 2, a reversible thermosensitive recording layer 3 is provided on the surface of a substrate 2, and an electric heating layer 1 is laminated on the reversible thermosensitive recording layer 3. In FIG. 3, the electric heating layer 1 is provided on the surface of the substrate 2,
A reversible thermosensitive recording layer 3 is laminated on the layer. Further, in FIG. 4, the reversible thermosensitive recording layer 3 is provided on the surface of the substrate 4 which generates heat when energized.
【０００７】本発明の可逆性感熱記録媒体を構成する通
電発熱層は、基体や可逆性感熱記録層等の上に全面に設
けてもよいし、帯状、円形や三角形、文字の形等の任意
の形状によるよう図５のように部分的に設けてもよい。
また、通電発熱層は、必ずしも１層だけではなく複数の
層を積層してもよいし、前記層構成を組み合せて、例え
ば基体の一方の面上に通電発熱層を設け、他方の面上に
可逆性感熱記録層を設けて、更に該可逆性感熱記録層の
上に通電発熱層を設けた層構成のように別々の層に設け
ることもできる。The electric heating layer constituting the reversible thermosensitive recording medium of the present invention may be provided on the entire surface of the substrate, the reversible thermosensitive recording layer or the like, or may be in the form of a strip, a circle, a triangle or a letter. 5 may be partially provided as shown in FIG.
Further, the energization heat generating layer is not necessarily limited to one layer, and a plurality of layers may be laminated. For example, the energization heat generating layer may be provided on one surface of the substrate and the other surface may be formed by combining the above layer configurations. It is also possible to provide the reversible thermosensitive recording layer, and further provide the reversible thermosensitive recording layer in separate layers such as a layer structure in which an electric heating layer is provided.
【０００８】次に、本発明の可逆性感熱記録媒体を構成
する各層について説明する。基体は、その使用形態、目
的により多くのものが使用できる。具体的には紙、合成
樹脂フィルム、不織布、ガラス、及びそれらに着色剤を
内添または被覆したものが挙げられる。本発明の第２の
可逆性感熱記録媒体では通電発熱特性を有している基体
も使用する。該基体は具体的には銅、アルミニウム、
鉄、ステンレス等の金属フォイル、金属繊維紙、カーボ
ン繊維紙、導電性高分子フィルム、金属粉末や金属繊
維、カーボン繊維等を混練りした合成樹脂フィルム等が
挙げられる。またこれらの導電材を図６のように合成樹
脂フィルム等の支持体に埋め込むことによりパターン状
の通電発熱機能を付与することもできる。Next, each layer constituting the reversible thermosensitive recording medium of the present invention will be described. As the substrate, many ones can be used depending on the use form and purpose. Specific examples include paper, synthetic resin film, non-woven fabric, glass, and those in which a coloring agent is internally added or coated. The second reversible thermosensitive recording medium of the present invention also uses a substrate having an electric heating characteristic. The substrate is specifically copper, aluminum,
Examples thereof include metal foils such as iron and stainless steel, metal fiber paper, carbon fiber paper, conductive polymer films, synthetic resin films obtained by kneading metal powder, metal fibers, carbon fibers and the like. Further, by embedding these conductive materials in a support such as a synthetic resin film as shown in FIG. 6, it is possible to impart a pattern-like electric heating function.
【０００９】通電発熱層は、銅、アルミニウム、鉄、ス
テンレス、銀、錫等の金属、および金属化合物、導電性
カーボン、導電性高分子等の粉末、繊維状物、フォイル
状物からなる導電材をエポキシ、ポリイミド等からなる
結着剤と混合し塗工方法等により設けられる。また、金
属材料については蒸着やメッキにより設けることもでき
るし、導電性ガラス等からなる透明電極でもよい。The electric heating layer is made of a metal such as copper, aluminum, iron, stainless steel, silver or tin, and a conductive material made of metal compound, conductive carbon, powder of conductive polymer, fibrous material or foil material. Is mixed with a binder made of epoxy, polyimide, or the like to be provided by a coating method or the like. Further, the metal material may be provided by vapor deposition or plating, or a transparent electrode made of conductive glass or the like may be used.
【００１０】可逆性感熱記録層は、有機高分子樹脂中に
有機低分子物質が分散したものであって、温度により可
逆的に透明度が変化する性質を有する。該有機高分子樹
脂としては、透明性が良く、機械的強度に優れ、成膜性
の良いものが好ましい。その具体例としては、ポリ塩化
ビニル、塩化ビニル−酢酸ビニル共重合体、塩化ビニル
−酢酸ビニル−ビニルアルコール共重合体、塩化ビニル
−酢酸ビニル−マレイン酸共重合体、塩化ビニル−アク
リレート共重合体、ポリ塩化ビニリデン、塩化ビニリデ
ン−塩化ビニル共重合体、塩化ビニリデン−アクリロニ
トリル共重合体、ポリエステル樹脂、ポリアミド樹脂、
アクリル樹脂、シリコーン樹脂等が挙げられる。この中
で特に好ましいものとしては、塩化ビニル−酢酸ビニル
共重合体、塩化ビニル−酢酸ビニル−マレイン酸共重合
体、塩化ビニル−酢酸ビニル−ビニルアルコール共重合
体、ポリエステル樹脂が挙げられる。The reversible thermosensitive recording layer is composed of an organic polymer resin and an organic low molecular weight substance dispersed therein, and has a property that the transparency reversibly changes with temperature. As the organic polymer resin, those having good transparency, excellent mechanical strength and good film forming property are preferable. Specific examples thereof include polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinyl acetate-vinyl alcohol copolymer, vinyl chloride-vinyl acetate-maleic acid copolymer, vinyl chloride-acrylate copolymer. , Polyvinylidene chloride, vinylidene chloride-vinyl chloride copolymer, vinylidene chloride-acrylonitrile copolymer, polyester resin, polyamide resin,
Acrylic resin, silicone resin, etc. are mentioned. Among these, particularly preferred are vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinyl acetate-maleic acid copolymer, vinyl chloride-vinyl acetate-vinyl alcohol copolymer, and polyester resin.
【００１１】有機低分子物質としては、アルカノール、
アルカンジオール、ハロゲノアルカノール、ハロゲノア
ルカンジオール、アルキルアミン、アルカン、アルケ
ン、アルキン、ハロゲノアルカン、ハロゲノアルケン、
ハロゲノアルキン、シクロアルカン、シクロアルケン、
シクロアルキン、飽和または不飽和モノ又はジカルボン
酸及びそれらのエステル、アミド、又はアンモニウム
塩、飽和又は不飽和ハロゲノ脂肪酸及びそれらのエステ
ル、アミド、又はアンモニウム塩、ハロゲノアリルカル
ボン酸及びそのエステル、アミド又はアンモニウム塩、
チオアルコール、チオカルボン酸重合体及びそのエステ
ル、アミド又はアンモニウム塩、チオアルコールのカル
ボン酸エステル等であって、その炭素数は１０〜５０、
分子量として１００〜８００のものが挙げられる。特に
好ましいものとしては、融点が５０〜１５０℃の範囲に
ある、ラウリン酸、パルミチン酸、ステアリン酸、アラ
キン酸、ベヘン酸等の高級脂肪酸、及びそれらのエステ
ル、アミド及びアンモニウム塩が挙げられる。As the organic low molecular weight substance, alkanol,
Alkanediol, halogenoalkanol, halogenoalkanediol, alkylamine, alkane, alkene, alkyne, halogenoalkane, halogenoalkene,
Halogenoalkyne, cycloalkane, cycloalkene,
Cycloalkynes, saturated or unsaturated mono- or dicarboxylic acids and their esters, amides or ammonium salts, saturated or unsaturated halogeno fatty acids and their esters, amides or ammonium salts, halogenoallylcarboxylic acids and their esters, amides or ammonium salt,
Thioalcohol, thiocarboxylic acid polymer and its ester, amide or ammonium salt, carboxylic acid ester of thioalcohol, etc., having 10 to 50 carbon atoms,
The molecular weight may be 100 to 800. Particularly preferred are higher fatty acids such as lauric acid, palmitic acid, stearic acid, arachidic acid and behenic acid, which have a melting point in the range of 50 to 150 ° C., and their esters, amides and ammonium salts.
【００１２】有機低分子物質は有機高分子樹脂中に分散
するが、その混合比は重量部で有機高分子樹脂１００重
量部に対して有機低分子物質が５〜２００重量部である
のが好ましく、特に１０〜１００重量部の範囲であるの
が好ましい。有機低分子物質の量が５重量部未満の場合
は可逆性感熱記録層の不透明化（白濁化）が充分でな
く、コントラストが得られ難い。また２００重量部より
多いと、可逆性感熱記録層の成膜性が悪化する。可逆性
感熱記録層の厚さは３〜３０μｍの範囲にあるものが好
ましく、５〜１５μｍの範囲にあるものがより好まし
い。厚さが３μｍよりも薄いと可逆性感熱記録層の不透
明化が充分でなく、また３０μｍより厚いと通電発熱層
や感熱ヘッドからの熱伝導性が悪くなり、可逆性感熱記
録層の感度が低下する。上記可逆性感熱記録層は、白
濁、透明のコントラストにより可視画像を得るものであ
るので、コントラストを向上させるために可逆性感熱記
録層の背後に適当な色調の着色層や、アルミニウムの蒸
着層等の金属薄膜を光反射層として設けることも可能で
ある。The organic low molecular weight substance is dispersed in the organic polymer resin, and the mixing ratio thereof is preferably 5 to 200 parts by weight of the organic low molecular weight substance based on 100 parts by weight of the organic polymer resin. The range of 10 to 100 parts by weight is particularly preferable. When the amount of the organic low molecular weight substance is less than 5 parts by weight, the reversible thermosensitive recording layer is not sufficiently opaque (whitened) and it is difficult to obtain contrast. If it is more than 200 parts by weight, the film forming property of the reversible thermosensitive recording layer is deteriorated. The thickness of the reversible thermosensitive recording layer is preferably in the range of 3 to 30 μm, more preferably 5 to 15 μm. If the thickness is less than 3 μm, the reversible thermosensitive recording layer is not sufficiently opaque, and if it is thicker than 30 μm, the thermal conductivity from the energizing heat generating layer or the thermal head is deteriorated and the sensitivity of the reversible thermosensitive recording layer is lowered. To do. Since the reversible thermosensitive recording layer is to obtain a visible image with white turbidity and transparent contrast, a colored layer having an appropriate color tone behind the reversible thermosensitive recording layer for improving the contrast, a vapor deposition layer of aluminum, etc. It is also possible to provide the metal thin film as the light reflection layer.
【００１３】本発明では、可逆性感熱記録層の耐薬品性
をさらに向上させるため、及び感熱ヘッドとのマッチン
グ性を向上させるために、可逆性感熱記録層上に保護層
を、又中間層を介して保護層を設けることができる。こ
の中間層や保護層は、ポリメタクリレート樹脂、シリコ
ーン樹脂、アクリル樹脂、アルキッド樹脂等の熱可塑性
又は熱硬化性の樹脂や、ウレタン−アクリレート樹脂、
エポキシ−アクリレート樹脂等の紫外線硬化性又は電子
線硬化性樹脂中に、ワックスやシリコンオイル等の滑材
や無機又は有機系フィラーを含有したものである。ま
た、可逆性感熱記録層上に部分的に印刷層を形成しても
よく、その際印刷層の色を鮮やかにするために、印刷層
を形成する部分に予め白色層を設けておいてもよい。本
発明の可逆性感熱記録媒体は、その実施に当たって磁気
記録層と組み合わせることができる。すなわち基体の背
面に磁気記録層を設けたり、基体の同一面上に磁気記録
層、磁気記録層の着色を隠ぺいする層、感熱発色層を順
次積層するものである。In the present invention, in order to further improve the chemical resistance of the reversible thermosensitive recording layer and to improve the matching property with the thermosensitive head, a protective layer and an intermediate layer are provided on the reversible thermosensitive recording layer. A protective layer can be provided via the. The intermediate layer and the protective layer are thermoplastic or thermosetting resins such as polymethacrylate resin, silicone resin, acrylic resin, alkyd resin, urethane-acrylate resin,
An ultraviolet curable or electron beam curable resin such as an epoxy-acrylate resin contains a lubricant such as wax or silicon oil and an inorganic or organic filler. Further, a printing layer may be partially formed on the reversible thermosensitive recording layer, and in this case, in order to make the color of the printing layer vivid, a white layer may be provided in advance in the portion where the printing layer is formed. Good. The reversible thermosensitive recording medium of the present invention can be combined with a magnetic recording layer in its implementation. That is, a magnetic recording layer is provided on the back surface of the substrate, or a magnetic recording layer, a layer for hiding the coloring of the magnetic recording layer, and a thermosensitive coloring layer are sequentially laminated on the same surface of the substrate.
【００１４】次に本発明の記録方法を説明する。本発明
の記録方法は、前記において詳述した可逆性感熱記録媒
体において、通電発熱層あるいは通電により発熱する基
体への通電を制御して、可逆性感熱記録層を不透明化あ
るいは透明化する可逆性感熱記録媒体の記録方法であ
る。また、通電発熱層あるいは通電により発熱する基体
への通電と、外部からの加熱とを制御して、可逆性感熱
記録層を不透明化あるいは透明化する可逆性感熱記録媒
体の記録方法である。本発明の記録方法は、通電発熱層
に電流を通じて（通電）、該電流の量や印加時間を制御
して該通電発熱層にジュール熱を発生させ通電発熱層を
加熱し、該通電発熱層に隣接した可逆性感熱記録層を加
熱して該可逆性感熱記録層を不透明化あるいは透明化せ
しめて記録するものである。Next, the recording method of the present invention will be described. In the recording method of the present invention, in the reversible thermosensitive recording medium described in detail above, the reversible thermosensitive recording layer is made opaque or transparent by controlling the energization to the energized heating layer or the substrate that generates heat by energization. This is a recording method for a thermal recording medium. Further, it is a recording method for a reversible thermosensitive recording medium in which the reversible thermosensitive recording layer is made opaque or transparent by controlling energization to an energized heat generating layer or a substrate which generates heat by energization and external heating. In the recording method of the present invention, an electric current is passed through the electric heating layer (energization), Joule heat is generated in the electric heating layer by controlling the amount and application time of the electric current to heat the electric heating layer, and the heating layer is heated. An adjacent reversible thermosensitive recording layer is heated to make the reversible thermosensitive recording layer opaque or transparent for recording.
【００１５】本発明の記録方法では、外部からの加熱と
は感熱ヘッドや熱ペン、熱ロール等のことをいうが特に
これに限定されるものではない。本発明の記録方法で
は、可逆性感熱記録媒体内部の通電発熱層からの加熱と
外部からの加熱とを両方使い可逆性感熱記録層を不透明
化あるいは透明化することができる。すなわち２つの加
熱手段をそれぞれ可逆性感熱記録層への不透明化と透明
化とに使い分けることもできるし、外部からの加熱に伴
う可逆性感熱記録媒体表面の損傷を少なくするために同
時に両方の加熱をおこなうことも可能である。In the recording method of the present invention, the external heating means a thermal head, a thermal pen, a thermal roll, etc., but is not particularly limited thereto. In the recording method of the present invention, it is possible to make the reversible thermosensitive recording layer opaque or transparent by using both the heating from the electric heating layer inside the reversible thermosensitive recording medium and the heating from the outside. That is, the two heating means can be separately used for making the reversible thermosensitive recording layer opaque and transparent, and to reduce damage to the surface of the reversible thermosensitive recording medium due to heating from the outside, both heating can be performed at the same time. It is also possible to do.
【００１６】[0016]
【実施例】以下に本発明の実施例を述べる。 実施例１ 厚さ５０μｍの透明なポリエステルフィルムの片面に、
エポキシ樹脂にカーボン繊維を混入した塗料を塗布し、
硬化させて通電発熱層を設けた。該通電発熱層の塗布厚
は２０μｍで、表面抵抗は１０3Ω／ｃｍであった。一
方、ポリエステルフィルムの反対面には下記処方の塗料
を乾燥後の塗布厚が１５μｍとなるように塗布し可逆性
感熱記録層を形成した。 Ｎ−ステアリルエルカ酸アミド ２０重量部 塩化ビニル−酢酸ビニル−ビニルアルコール共重合体 ８０重量部 テトラヒドロフラン ８００重量部 さらにこの可逆性感熱記録層上に、オフセット印刷法
で、紫外線硬化型ウレタン−アクリル系樹脂を印刷して
膜厚１μｍの保護層を形成し、本発明の可逆性感熱記録
媒体を得た。この可逆性感熱記録媒体の可逆性感熱記録
層側から６本／ｍｍの感熱ヘッドで０．５ｍｊ／ｄｏｔ
の印可エネルギーで印字を行ったところ明瞭な白濁画像
が得られた。さらにこれを、通電発熱層に通電して可逆
性感熱記録層表面が約９０℃になるように加熱したとこ
ろ、先の白濁画像が完全に消失し全体が透明状態になっ
た。この白濁、透明化は何回でも繰り返し可能であっ
た。EXAMPLES Examples of the present invention will be described below. Example 1 On one surface of a transparent polyester film having a thickness of 50 μm,
Apply paint mixed with carbon fiber to epoxy resin,
It was cured to provide an electric heating layer. The coating thickness of the electric heating layer was 20 μm, and the surface resistance was 10 3 Ω / cm. On the other hand, a reversible thermosensitive recording layer was formed on the opposite surface of the polyester film by applying a coating composition having the following formulation so that the coating thickness after drying was 15 μm. N-stearyl erucic acid amide 20 parts by weight Vinyl chloride-vinyl acetate-vinyl alcohol copolymer 80 parts by weight Tetrahydrofuran 800 parts by weight Further, on this reversible thermosensitive recording layer, an ultraviolet-curable urethane-acrylic resin was applied by offset printing. Was printed to form a protective layer having a film thickness of 1 μm to obtain a reversible thermosensitive recording medium of the present invention. 0.5 mj / dot with a thermal head of 6 lines / mm from the reversible thermosensitive recording layer side of this reversible thermosensitive recording medium.
When printing was performed with the applied energy of, a clear white turbid image was obtained. When this was further heated by heating the current-carrying heat-generating layer so that the surface of the reversible thermosensitive recording layer was heated to about 90 ° C., the above-mentioned cloudy image disappeared completely and the whole became transparent. This cloudiness and transparency could be repeated any number of times.
【００１７】実施例２ 厚さ１００μｍの透明なポリエチレンテレフタレートフ
ィルムの片面に実施例１と同様の可逆性感熱記録層を設
け、さらにその上にアルファベットのＡの形状を有する
ネサガラスの透明電極からなる通電発熱層を設けて、本
発明の可逆性感熱記録媒体を得た。そして、該透明電極
に通電し、通電する電流、時間を制御することにより、
明瞭な白濁、透明状態を上記形状に繰り返し形成するこ
とが出来た。Example 2 A reversible thermosensitive recording layer similar to that in Example 1 was provided on one side of a transparent polyethylene terephthalate film having a thickness of 100 μm, and further a current was formed by a transparent electrode made of Nesa glass having the shape of letter A on it. By providing a heat generating layer, a reversible thermosensitive recording medium of the present invention was obtained. Then, by energizing the transparent electrode and controlling the energizing current and time,
It was possible to repeatedly form a clear opaque and transparent state in the above shape.
【００１８】実施例３ 厚さ１８８μｍの乳白ポリエチレンテレフタレートフィ
ルムの片面に実施例１の通電発熱層、可逆性感熱記録層
及び保護層を順次積層し、本発明の可逆性感熱記録媒体
を得た。なお、可逆性感熱記録層及び保護層には、通電
発熱層に通電出来るように両端に未塗布部を残すように
した。実施例１に準じて感熱ヘッド及び通電による白
濁、透明化をおこなったところ何回でも繰り返し可能で
あった。Example 3 A reversible thermosensitive recording medium of the present invention was obtained by successively laminating the current-generating heat generating layer, the reversible thermosensitive recording layer and the protective layer of Example 1 on one surface of a milky-white polyethylene terephthalate film having a thickness of 188 μm. In the reversible thermosensitive recording layer and the protective layer, uncoated portions were left at both ends so that the energization heating layer could be energized. According to Example 1, white turbidity and transparency were obtained by applying a thermal head and energization, and it was possible to repeat any number of times.
【００１９】実施例４ 厚さ２００μｍのアラミド繊維とカーボン繊維との混抄
紙上にフタロシアニン系の青色顔料からなる着色層を設
け、さらにその上に実施例１の可逆性感熱記録層及び保
護層を形成し、本発明の可逆性感熱記録媒体を得た。実
施例１に準じて感熱ヘッド及び通電による白濁、透明化
をおこなったところ何回でも繰り返し可能であった。Example 4 A colored layer made of a phthalocyanine-based blue pigment was provided on a mixed paper of aramid fiber and carbon fiber having a thickness of 200 μm, and the reversible thermosensitive recording layer and the protective layer of Example 1 were further provided thereon. A reversible thermosensitive recording medium of the present invention was obtained. According to Example 1, white turbidity and transparency were obtained by applying a thermal head and energization, and it was possible to repeat any number of times.
【００２０】[0020]
【発明の効果】上記の如く本発明は、通電発熱層への通
電により可逆性感熱記録層を加熱させて白濁、透明化を
おこなうため従来の外部からの加熱方法に比べてエネル
ギーのロスが少なく効率的に加熱することができる。ま
た、感熱ヘッドや熱ロール等の外部加熱装置をかならず
しも必要としないため、装置を簡略化することができ
る。INDUSTRIAL APPLICABILITY As described above, according to the present invention, the reversible thermosensitive recording layer is heated by energizing the energizing heat generating layer to cause clouding and transparency, so that energy loss is less than that of the conventional external heating method. It can be heated efficiently. Moreover, since an external heating device such as a thermal head or a heat roll is not always required, the device can be simplified.
【図１】本発明の可逆性感熱記録媒体の一例の模式的断
面図である。FIG. 1 is a schematic sectional view of an example of a reversible thermosensitive recording medium of the present invention.
【図２】本発明の可逆性感熱記録媒体の一例の模式的断
面図である。FIG. 2 is a schematic cross-sectional view of an example of the reversible thermosensitive recording medium of the present invention.
【図３】本発明の可逆性感熱記録媒体の一例の模式的断
面図である。FIG. 3 is a schematic cross-sectional view of an example of the reversible thermosensitive recording medium of the present invention.
【図４】本発明の可逆性感熱記録媒体の一例の模式的断
面図である。FIG. 4 is a schematic sectional view of an example of the reversible thermosensitive recording medium of the present invention.
【図５】本発明の可逆性感熱記録媒体の一例の模式的断
面図である。FIG. 5 is a schematic cross-sectional view of an example of the reversible thermosensitive recording medium of the present invention.
【図６】本発明の可逆性感熱記録媒体の一例の模式的断
面図である。FIG. 6 is a schematic cross-sectional view of an example of the reversible thermosensitive recording medium of the present invention.
【図７】本発明で用いる可逆的記録の原理の説明図であ
る。FIG. 7 is an explanatory diagram of the principle of reversible recording used in the present invention.
１ 通電発熱層 ２ 基体 ３ 可逆性感熱記録層 ４ 通電により発熱する基体 ５ 導電材 ６ 合成樹脂フィルム DESCRIPTION OF SYMBOLS 1 Electric heating layer 2 Substrate 3 Reversible thermosensitive recording layer 4 Substrate that generates heat by energization 5 Conductive material 6 Synthetic resin film
───────────────────────────────────────────────────── フロントページの続き (72)発明者 飯田 勉 静岡県静岡市用宗巴町３番１号 株式会社 巴川製紙所技術研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsutomu Iida 3-1, Sobamachi, Shizuoka City, Shizuoka Prefecture
Claims (6)
通電発熱層からなることを特徴とする可逆性感熱記録媒
体。1. A reversible thermosensitive recording medium comprising at least a substrate, a reversible thermosensitive recording layer, and an electric heating layer.
び可逆性感熱記録層からなることを特徴とする可逆性感
熱記録媒体。2. A reversible thermosensitive recording medium comprising at least a substrate which generates heat when energized and a reversible thermosensitive recording layer.
通電発熱層からなる可逆性感熱記録媒体を構成する該通
電発熱層への通電を制御して、可逆性感熱記録層を不透
明化あるいは透明化することを特徴とする可逆性感熱記
録媒体の記録方法。3. The reversible thermosensitive recording layer is made opaque or transparent by controlling energization to the energized heat generating layer constituting a reversible thermosensitive recording medium comprising at least a substrate, a reversible thermosensitive recording layer and an energized heat generating layer. A recording method for a reversible thermosensitive recording medium, comprising:
び可逆性感熱記録層からなる可逆性感熱記録媒体を構成
する該基体への通電を制御して、可逆性感熱記録層を不
透明化あるいは透明化することを特徴とする可逆性感熱
記録媒体の記録方法。4. A reversible thermosensitive recording layer is made opaque or transparent by controlling energization to the substrate constituting a reversible thermosensitive recording medium consisting of a substrate that generates heat at least when energized and a reversible thermosensitive recording layer. A recording method for a reversible thermosensitive recording medium, which is characterized in that
通電発熱層からなる可逆性感熱記録媒体を構成する該通
電発熱層への通電と外部からの加熱とを制御して、可逆
性感熱記録層を不透明化あるいは透明化することを特徴
とする可逆性感熱記録媒体の記録方法。5. A reversible thermosensitive recording layer by controlling energization and heating from the outside of the reversible thermosensitive recording medium, which constitutes a reversible thermosensitive recording medium comprising at least a substrate, a reversible thermosensitive recording layer and an electrothermal recording layer. A recording method for a reversible thermosensitive recording medium, characterized in that the recording medium is made opaque or transparent.
び可逆性感熱記録層からなる可逆性感熱記録媒体を構成
する該基体への通電と外部からの加熱とを制御して、可
逆性感熱記録層を不透明化あるいは透明化することを特
徴とする可逆性感熱記録媒体の記録方法。6. A reversible thermosensitive recording layer is formed by controlling energization and external heating of the substrate constituting a reversible thermosensitive recording medium comprising at least a substrate that generates heat upon energization and a reversible thermosensitive recording layer. A recording method for a reversible thermosensitive recording medium, which is characterized by making it opaque or transparent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34983891A JPH05155148A (en) | 1991-12-10 | 1991-12-10 | Reversible thermal recording medium and recording method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34983891A JPH05155148A (en) | 1991-12-10 | 1991-12-10 | Reversible thermal recording medium and recording method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05155148A true JPH05155148A (en) | 1993-06-22 |
Family
ID=18406458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34983891A Pending JPH05155148A (en) | 1991-12-10 | 1991-12-10 | Reversible thermal recording medium and recording method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05155148A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62108093A (en) * | 1985-11-07 | 1987-05-19 | Canon Inc | Thermal recording material |
| JPH01133792A (en) * | 1987-11-18 | 1989-05-25 | Ricoh Co Ltd | Apparatus for forming image for projection |
| JPH03197086A (en) * | 1989-12-26 | 1991-08-28 | Ricoh Co Ltd | Recording medium |
-
1991
- 1991-12-10 JP JP34983891A patent/JPH05155148A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62108093A (en) * | 1985-11-07 | 1987-05-19 | Canon Inc | Thermal recording material |
| JPH01133792A (en) * | 1987-11-18 | 1989-05-25 | Ricoh Co Ltd | Apparatus for forming image for projection |
| JPH03197086A (en) * | 1989-12-26 | 1991-08-28 | Ricoh Co Ltd | Recording medium |
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