JPH03159788A - Thermal transfer ink sheet - Google Patents
Thermal transfer ink sheetInfo
- Publication number
- JPH03159788A JPH03159788A JP1297671A JP29767189A JPH03159788A JP H03159788 A JPH03159788 A JP H03159788A JP 1297671 A JP1297671 A JP 1297671A JP 29767189 A JP29767189 A JP 29767189A JP H03159788 A JPH03159788 A JP H03159788A
- Authority
- JP
- Japan
- Prior art keywords
- thermal transfer
- temp
- color
- recording paper
- ink 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
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 19
- 239000003094 microcapsule Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 13
- 229920005989 resin Polymers 0.000 claims abstract description 13
- 239000011347 resin Substances 0.000 claims abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 7
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 6
- 238000004040 coloring Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 239000004986 Cholesteric liquid crystals (ChLC) Substances 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- HVYWMOMLDIMFJA-DPAQBDIFSA-N cholesterol Chemical compound C1C=C2C[C@@H](O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2 HVYWMOMLDIMFJA-DPAQBDIFSA-N 0.000 description 4
- 150000001841 cholesterols Chemical class 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 230000003098 cholesteric effect Effects 0.000 description 2
- 235000012000 cholesterol Nutrition 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000013518 transcription Methods 0.000 description 1
- 230000035897 transcription Effects 0.000 description 1
- 229920006352 transparent thermoplastic Polymers 0.000 description 1
Landscapes
- Recording Measured Values (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
Abstract
Description
【発明の詳細な説明】
〔概 要〕
サーマルヘッドを用いた熱転写記録方式のプリンタやフ
ァクシミリ等に適用される熱転写インクシ一トに関し、
簡単な構造で、転写画像に温度識別機能を持たせると共
に、色相を種々に変化させることができ、且つ転写する
記録紙を前もって黒色に印刷しておく必要のない熱転写
インクシ一トを提供することを目的とし、
温度により色が可逆的に変化する性質を持ち、且つ各々
発色温度と色相の組合及び化学構造の異なる数種類の液
晶と、カーボン粉末とを、加熱により溶融しない透明性
樹脂で包んだマイクロカプセルと、熱可塑性樹脂との混
合物から構戊されるインク層をシート基材上に塗設した
ことを特徴とする熱転写インクシ一トを構或する。[Detailed Description of the Invention] [Summary] Regarding a thermal transfer ink sheet applied to a thermal transfer recording type printer using a thermal head, a facsimile machine, etc., the present invention has a simple structure, provides a temperature identification function to the transferred image, and The purpose of the present invention is to provide a thermal transfer ink sheet that can change the hue in various ways and does not require printing the recording paper to black in advance, and has the property of changing color reversibly depending on temperature. , and an ink composed of a mixture of several types of liquid crystals, each with a different combination of color development temperature and hue, and chemical structure, and carbon powder, which are wrapped in a transparent resin that does not melt when heated, and a thermoplastic resin. The thermal transfer ink sheet is characterized in that the layer is coated on a sheet base material.
本発明は熱転写インクシ一トに関する。本発明の熱転写
インクシ一トはサーマルヘッドを用いた熱転写記録方式
のプリンタやファクシミリ等に適用される。The present invention relates to thermal transfer ink sheets. The thermal transfer ink sheet of the present invention is applied to thermal transfer recording type printers, facsimile machines, etc. using thermal heads.
従来の熱転写インクシ一トの概要図を第６図に示す。図
示のように、従来の熱転写インクシ一ト１０のベースフ
ィルム、即ち基材１１は例えばボリエステルなどの表面
が平滑なプラスティクフィルムからなり、その上に熱溶
融性インク層ｌ２が塗工されている。熱溶融性インクは
ワックス材に色材を混入した固体インクである。上記の
熱転写インクシ一ト１０を記録紙１３上に熱溶融性イン
ク層１２を対応させて重ねた状態で、インクシ一トの基
材１１の面にサーマルヘッドｌ４を押圧し、該サーマル
ヘッドｌ４の発熱素子により前記熱溶融性インク層ｌ２
を選択的に加熱して、該インク層表面で溶融したインク
或分をしみ出させ、記録紙１３上に所定の文字又はパタ
ーンを転写する。A schematic diagram of a conventional thermal transfer ink sheet is shown in FIG. As shown in the figure, the base film of the conventional thermal transfer ink sheet 10, that is, the base material 11, is made of a plastic film with a smooth surface, such as polyester, and a heat-melting ink layer l2 is coated thereon. . Hot-melt ink is a solid ink made by mixing a wax material with a coloring material. With the thermal transfer ink sheet 10 described above stacked on the recording paper 13 with the heat-melting ink layer 12 corresponding to the thermal transfer ink sheet 10, the thermal head l4 is pressed against the surface of the base material 11 of the ink sheet. The heat-melting ink layer l2 is heated by the heating element.
is selectively heated, a portion of the ink melted on the surface of the ink layer oozes out, and predetermined characters or patterns are transferred onto the recording paper 13.
上記の様な従来の熱転写インクシ一ト１０を適用すると
、温度による転写像表面の色の変化がないために、転写
画像に温度識別機能を持たせることが出来なかった。When the conventional thermal transfer ink sheet 10 as described above is applied, it is not possible to provide the transferred image with a temperature identification function because there is no change in color on the surface of the transferred image due to temperature.
そこで、本発明は、簡単な構造で、転写画像に温度識別
機能を持たせると共に、色相を種々に変化させることが
でき、且つ転写する起録紙を前もって黒色に印刷してお
く必要のない熱転写インクシ一トを提供することを目的
とする。Therefore, the present invention is a thermal transfer method that has a simple structure, provides a temperature identification function to the transferred image, can vary the hue, and does not require printing the recording paper to be transferred black in advance. The purpose is to provide ink sheets.
〔課題を解決するための手段〕
本発明は上記問題を解決するため，第２図に示す構或の
液晶マイクロカプセルをインク層に含有する第１図に示
す様な熱転写インクシ一トを適用して転写を行う。即ち
、本発明の熱転写インクシ一トは、温度により色が可逆
的に変化する性質を持ち、且つ各々発色温度と色相の組
合及び化学構造の異なる数種類の液晶３２と、カーボン
粉末３３とを、加熱により溶融しない透明性樹脂３１で
包んだマイクロカプセル２３と、熱可塑性樹脂２４との
混合物から構或されるインク層２２をシート基材上２１
上に塗設したことを特徴とする。[Means for Solving the Problems] In order to solve the above problems, the present invention applies a thermal transfer ink sheet as shown in FIG. 1 containing liquid crystal microcapsules having the structure shown in FIG. 2 in the ink layer. Perform the transcription. That is, the thermal transfer ink sheet of the present invention has several types of liquid crystals 32 whose colors change reversibly depending on temperature, and which have different combinations of coloring temperatures and hues and chemical structures, and carbon powder 33, which are heated. An ink layer 22 composed of a mixture of microcapsules 23 wrapped in a transparent resin 31 that does not melt and a thermoplastic resin 24 is placed on the sheet base material 21.
It is characterized by being coated on top.
第３図に示すように、本発明の熱転写インクシート２０
を、インク層２２側を記録紙ｌ３に向けて、この記録紙
１３に重ね合わせてプラテンローラ等の支持体１５に押
しつけ、インクシ一ト２０の基材２１側よりサーマルヘ
ッド１４上の複数の発熱部を印字情報に基づいて選択的
に発熱させると、インク層２２中の熱可塑性透明樹脂２
４が溶融して流動することにより液晶マイクロカプセル
２３が記録紙１３に転写される。液晶マイクロカプセル
２３中の数種類の液晶３２は各々温度変化でラセンのピ
ッチの変化を起こすため散乱する光の波長が変わって変
色する。従って、印字パターンに従い液晶マイクロカプ
セル２３が記録紙ｌ３上に転写されていく。数種類の液
晶３２は各々発色温度と色相の組合及び化学構造が異な
るので、呈色温度範囲が広く、また、カーボン粉末３３
を混入しているので、転写の際記録紙ｌ３の表面を前も
って黒色に印刷しておかなくてもよい。As shown in FIG. 3, a thermal transfer ink sheet 20 of the present invention
is superimposed on the recording paper 13 with the ink layer 22 side facing the recording paper l3 and pressed against a support 15 such as a platen roller. When the parts are selectively heated based on the printed information, the thermoplastic transparent resin 2 in the ink layer 22
The liquid crystal microcapsules 23 are transferred onto the recording paper 13 by melting and flowing the liquid crystal microcapsules 4 . Each of the several types of liquid crystals 32 in the liquid crystal microcapsules 23 causes a change in helical pitch due to a temperature change, so the wavelength of the scattered light changes and the color changes. Therefore, the liquid crystal microcapsules 23 are transferred onto the recording paper l3 according to the print pattern. Several types of liquid crystals 32 have different coloring temperatures, hue combinations, and chemical structures, so the coloring temperature range is wide, and the carbon powder 33
, it is not necessary to print the surface of the recording paper l3 in black in advance during transfer.
以下、添付図面を参照して本発明の実施例を詳細に説明
する。Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
第１図は本発明に関わる熱転写インクシ一トの概略断面
図である。図において、２１は例えば５μｍの厚さのポ
リエチレンテレフタートフィルム（ＰＥＴ）からなるシ
ート状の基材、２２は例えば９μｍの厚さのインク層で
ある。該インク層２２は第２図に示すようなマイクロカ
プセル２３と例えば酢酸ビニル樹脂等の透明性熱可塑性
樹脂（熱変形温度４０℃〉 ２４の重量比４：６の混合
物である。該マイクロカプセル２３は外皮３１がサーマ
ルヘッドｌ４による加熱によっては溶けない、例えばフ
ェノール樹脂．などの透明性高融点樹脂（熱変形温度１
３０℃）であり、内容物は、例えば第４図に示すような
構造を有する複数種の混合液晶或分３２、例えば混合コ
レステリック液晶と、カーボン粉末３３との混合物であ
る。コレステリック液晶としては、コレステロール（構
造図を第４図に示す）の水酸基（−ＤＨ）をハロゲンで
置換したものとコレステロールと脂肪酸、炭酸とのエス
テル化合物などコレステロール誘導体や分子内に不斉炭
素を有し、かつ液晶構造を形或するのに都合のよい幾何
学的な分子の形を持つ化合物などがあり、その主なもの
を第５図に示した。FIG. 1 is a schematic cross-sectional view of a thermal transfer ink sheet according to the present invention. In the figure, 21 is a sheet-like base material made of polyethylene tereftate film (PET) with a thickness of, for example, 5 μm, and 22 is an ink layer with a thickness of, for example, 9 μm. The ink layer 22 is a mixture of microcapsules 23 as shown in FIG. 2 and a transparent thermoplastic resin such as vinyl acetate resin (heat deformation temperature 40° C.) 24 in a weight ratio of 4:6.The microcapsules 23 The outer skin 31 does not melt when heated by the thermal head l4, for example, transparent high melting point resin such as phenol resin (heat distortion temperature 1).
30° C.), and the contents are a mixture of a plurality of types of mixed liquid crystals 32 having a structure as shown in FIG. 4, for example, mixed cholesteric liquid crystals, and carbon powder 33. Cholesteric liquid crystals include cholesterol derivatives such as those in which the hydroxyl group (-DH) of cholesterol (the structural diagram is shown in Figure 4) is replaced with a halogen, ester compounds of cholesterol, fatty acids, and carbonic acid, and cholesterol derivatives that have asymmetric carbon atoms in the molecule. However, there are compounds that have a geometrical molecular shape that is convenient for forming a liquid crystal structure, and the main ones are shown in FIG.
即ち、第５図において、（ａ）はコレステロール誘導体
の構造例を示し、（ｂ）はコレステリック環を持たない
コレステリック液晶の構造例を示す。That is, in FIG. 5, (a) shows an example of the structure of a cholesterol derivative, and (b) shows an example of the structure of a cholesteric liquid crystal having no cholesteric ring.
このようなインク層２２を基材２ｌ上に塗工する手段と
しては、外皮（透明性樹脂）３１を形威しているフェノ
ール樹脂が一般溶剤に抵抗を示すのに対し、酢酸ビニル
樹脂は多くの溶剤に溶けるため、例えば溶剤としてアセ
トンを用いたソルベントコーティング法を用いる。As a means of coating such an ink layer 22 on the base material 2l, phenol resin, which forms the outer skin (transparent resin) 31, shows resistance to general solvents, while vinyl acetate resin is often used. Therefore, for example, a solvent coating method using acetone as a solvent is used.
上記のような構或の熱転写インクシ一ト２０を第３図に
示す様にサーマルプリンタに配設された記録紙１３にイ
ンク層２２面を対向させて装着し、サーマルヘッド１４
を押圧した状態で、印加電力をＬＯＷ／ｍｍ’ 、印字
パルス幅を４ｍｓとした印字条件で転写記録を行う。The thermal transfer ink sheet 20 having the above structure is mounted on the recording paper 13 disposed in a thermal printer as shown in FIG.
While pressed, transfer recording is performed under printing conditions in which the applied power is LOW/mm' and the printing pulse width is 4 ms.
この熱転写インクシ一ト２０と記録紙１３を該インクシ
ートの基材２１側を外側（サーマルヘッド１４側）にし
て重ね合わせてプラテンローラ等の支持体１５に押しつ
けサーマルヘッド１４上の複数の発熱部を印字情報に基
づいて選択的に発熱させると、インク層２２中の熱可塑
性透明樹脂２４が溶融して流動することにより液晶マイ
クロカプセル２３が記録紙ｌ３に転写される。This thermal transfer ink sheet 20 and the recording paper 13 are stacked with the base material 21 side of the ink sheet on the outside (the thermal head 14 side) and pressed against a support 15 such as a platen roller, so that a plurality of heat generating parts on the thermal head 14 are pressed. When selectively generates heat based on printed information, the thermoplastic transparent resin 24 in the ink layer 22 melts and flows, thereby transferring the liquid crystal microcapsules 23 onto the recording paper l3.
上記のように本発明の熱転写インクシ一トによれば、液
晶マイクロカプセル２３中の液晶３２が化学構造の異な
る数種類の液晶から構或されているため、呈色温度範囲
がかなり広くなり、混合比を工夫することにより温度を
低温から高温に変化させた場合に色相が赤色から順次橙
，黄，緑．．．紫に変化させることができる。そのため
、異なる色調のカラー記録に使用できる他、温度計や体
温計、各種工業用検査等に対して、より幅広い適用が可
能となる。更に、マイクロカプセル２３内にカーボン粉
末３３を添加しているため，転写する前に記録紙１３表
面に黒色を前もって印刷しておかなくても良好な映像を
得ることが出来るようになる。As described above, according to the thermal transfer ink sheet of the present invention, since the liquid crystal 32 in the liquid crystal microcapsule 23 is composed of several types of liquid crystals with different chemical structures, the coloring temperature range is considerably wide, and the mixing ratio is By devising this, when the temperature is changed from low to high temperature, the hue changes sequentially from red to orange, yellow, and green. ．． ．． It can be changed to purple. Therefore, in addition to being able to be used for color recording of different tones, it can also be widely applied to thermometers, thermometers, various industrial inspections, etc. Furthermore, since carbon powder 33 is added to the microcapsules 23, good images can be obtained without printing black on the surface of the recording paper 13 before transfer.
第１図は本発明の熱転写記録インクシ一トを説明するた
めの要部断面図、第２図は第１図に示した本発明の熱転
写インクシ一トに含まれるマイクロカプセルの詳細断面
図、第３図は本発明における熱転写インクシ一トを適用
して熱転写記録を行う状態を示す図、第４図は本発明の
熱転写インクシー゜トにおけるマイクロカプセルの内容
物であるコレステリック液晶の構造図、第５図（ａ）は
コレステロール誘導体の構造例、第５図わ）はコレステ
リック環を持たないコレステリック液晶の構造例をそれ
ぞれ示し、第６図は従来の熱転写記録インクシ一トの概
略断面図である。
１３・・・記録紙、
１４・・・サーマルヘッド、
ｌ５・・・支持体くプラテン）、
２０・・・熱転写インクシート、
２１・・・基材、
２２・・・インク層、
２３・・・マイクロカプセル、
４・・・熱可塑性樹脂、
ｌ・・・透明性樹脂、
２・・・液晶或分、
３・・・カーボン粉末。FIG. 1 is a cross-sectional view of essential parts for explaining the thermal transfer recording ink sheet of the present invention, and FIG. 2 is a detailed cross-sectional view of microcapsules included in the thermal transfer ink sheet of the present invention shown in FIG. 3 is a diagram showing a state in which thermal transfer recording is performed using the thermal transfer ink sheet of the present invention, FIG. 4 is a structural diagram of cholesteric liquid crystal that is the content of microcapsules in the thermal transfer ink sheet of the present invention, and FIG. FIG. 5(a) shows an example of the structure of a cholesterol derivative, FIG. 5(a) shows an example of the structure of a cholesteric liquid crystal without a cholesteric ring, and FIG. 6 is a schematic cross-sectional view of a conventional thermal transfer recording ink sheet. DESCRIPTION OF SYMBOLS 13... Recording paper, 14... Thermal head, 15... Support platen), 20... Thermal transfer ink sheet, 21... Base material, 22... Ink layer, 23... Microcapsule, 4... Thermoplastic resin, l... Transparent resin, 2... Liquid crystal, 3... Carbon powder.
Claims (1)
各々発色温度と色相の組合及び化学構造の異なる数種類
の液晶（３２）と、カーボン粉末（３３）とを、加熱に
より溶融しない透明性樹脂（３１）で包んだマイクロカ
プセル（２３）と、熱可塑性樹脂（２４）との混合物と
から構成されるインク層（２２）をシート基材上（２１
）上に塗設したことを特徴とする熱転写インクシート。1. Several types of liquid crystals (32) that have the property of reversibly changing color depending on temperature and each having a different combination of coloring temperature and hue and chemical structure and carbon powder (33) have transparency that does not melt when heated. An ink layer (22) composed of a mixture of microcapsules (23) wrapped in a resin (31) and a thermoplastic resin (24) is placed on a sheet base material (21).
) A thermal transfer ink sheet characterized by being coated on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1297671A JPH03159788A (en) | 1989-11-17 | 1989-11-17 | Thermal transfer ink sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1297671A JPH03159788A (en) | 1989-11-17 | 1989-11-17 | Thermal transfer ink sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03159788A true JPH03159788A (en) | 1991-07-09 |
Family
ID=17849630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1297671A Pending JPH03159788A (en) | 1989-11-17 | 1989-11-17 | Thermal transfer ink sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03159788A (en) |
-
1989
- 1989-11-17 JP JP1297671A patent/JPH03159788A/en active Pending
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