JPH03284988A - Reversible recording medium - Google Patents
Reversible recording mediumInfo
- Publication number
- JPH03284988A JPH03284988A JP2086215A JP8621590A JPH03284988A JP H03284988 A JPH03284988 A JP H03284988A JP 2086215 A JP2086215 A JP 2086215A JP 8621590 A JP8621590 A JP 8621590A JP H03284988 A JPH03284988 A JP H03284988A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- recording medium
- precursor
- resin
- polymer liquid
- 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
- 230000002441 reversible effect Effects 0.000 title claims abstract description 11
- 239000005264 High molar mass liquid crystal Substances 0.000 claims abstract description 25
- 229920005989 resin Polymers 0.000 claims abstract description 24
- 239000011347 resin Substances 0.000 claims abstract description 23
- 239000002243 precursor Substances 0.000 claims abstract description 18
- 239000002245 particle Substances 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- 230000009477 glass transition Effects 0.000 claims description 3
- 230000000379 polymerizing effect Effects 0.000 claims 1
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 15
- 239000000758 substrate Substances 0.000 abstract description 7
- 239000011159 matrix material Substances 0.000 abstract description 6
- 238000010894 electron beam technology Methods 0.000 abstract description 5
- 239000013078 crystal Substances 0.000 abstract description 2
- 239000000178 monomer Substances 0.000 abstract description 2
- 238000006116 polymerization reaction Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 239000000975 dye Substances 0.000 description 10
- 239000011521 glass Substances 0.000 description 10
- 230000005684 electric field Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- INQDDHNZXOAFFD-UHFFFAOYSA-N 2-[2-(2-prop-2-enoyloxyethoxy)ethoxy]ethyl prop-2-enoate Chemical compound C=CC(=O)OCCOCCOCCOC(=O)C=C INQDDHNZXOAFFD-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
- -1 acrylic ester Chemical class 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- MYWOJODOMFBVCB-UHFFFAOYSA-N 1,2,6-trimethylphenanthrene Chemical compound CC1=CC=C2C3=CC(C)=CC=C3C=CC2=C1C MYWOJODOMFBVCB-UHFFFAOYSA-N 0.000 description 1
- OYKPJMYWPYIXGG-UHFFFAOYSA-N 2,2-dimethylbutane;prop-2-enoic acid Chemical compound OC(=O)C=C.OC(=O)C=C.OC(=O)C=C.CCC(C)(C)C OYKPJMYWPYIXGG-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- WLPATYNQCGVFFH-UHFFFAOYSA-N 2-phenylbenzonitrile Chemical group N#CC1=CC=CC=C1C1=CC=CC=C1 WLPATYNQCGVFFH-UHFFFAOYSA-N 0.000 description 1
- PUFNCAACUKXZTR-UHFFFAOYSA-N 4-[2-(4-pentylphenyl)phenyl]benzonitrile Chemical group C1=CC(CCCCC)=CC=C1C1=CC=CC=C1C1=CC=C(C#N)C=C1 PUFNCAACUKXZTR-UHFFFAOYSA-N 0.000 description 1
- JUDXBRVLWDGRBC-UHFFFAOYSA-N [2-(hydroxymethyl)-3-(2-methylprop-2-enoyloxy)-2-(2-methylprop-2-enoyloxymethyl)propyl] 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCC(CO)(COC(=O)C(C)=C)COC(=O)C(C)=C JUDXBRVLWDGRBC-UHFFFAOYSA-N 0.000 description 1
- HVVWZTWDBSEWIH-UHFFFAOYSA-N [2-(hydroxymethyl)-3-prop-2-enoyloxy-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(CO)(COC(=O)C=C)COC(=O)C=C HVVWZTWDBSEWIH-UHFFFAOYSA-N 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- CDOSHBSSFJOMGT-UHFFFAOYSA-N linalool Chemical compound CC(C)=CCCC(C)(O)C=C CDOSHBSSFJOMGT-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229920002601 oligoester Polymers 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 150000007519 polyprotic acids Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- ANRHNWWPFJCPAZ-UHFFFAOYSA-M thionine Chemical compound [Cl-].C1=CC(N)=CC2=[S+]C3=CC(N)=CC=C3N=C21 ANRHNWWPFJCPAZ-UHFFFAOYSA-M 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、高分子液晶を用い熱的および光電気的効果を
利用して書換えを可能とした記録媒体に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a recording medium that uses polymeric liquid crystal and is rewritable using thermal and photoelectric effects.
［従来の技術］
従来、常温下において結晶状態を示す膜状高分子液晶を
２枚の電極によって挟持した構造をもつ可逆的な記録媒
体が特開昭５８−１２５２４７号公報等に開示されてい
る。この種の記録媒体は、第２図に示すように、ガラス
等の基板θωの上に、透明電極００）、高分子液晶」滲
、対向電極（１））をこの順に積層したものであって、
情報の記録時には上記電極００） （Ｉ＋１の間に電場
を印加した状態で高分子液晶側に対してレーザ照射等に
よって局所的な加熱を行いガラス転移点以上の温度とす
ることでホメ第１−ロピソク状態とし、加熱部のみを透
明とする。[Prior Art] Conventionally, a reversible recording medium having a structure in which a film-like polymer liquid crystal that exhibits a crystalline state at room temperature is sandwiched between two electrodes has been disclosed in Japanese Patent Application Laid-Open No. 125247/1983. . As shown in Fig. 2, this type of recording medium has a transparent electrode 00), a polymer liquid crystal, and a counter electrode (1)) laminated in this order on a substrate θω made of glass or the like. ,
When recording information, the above electrode 00) (with an electric field applied between I+1, the polymer liquid crystal side is locally heated by laser irradiation, etc. to bring the temperature above the glass transition point. It is in a closed state and only the heating part is transparent.
印加電場を維持したまま冷却を行うことでホメオ（−ロ
ピノク状態は電場を印加しない状態でも維持される。情
報の消去時は記録時と同様の光照射を行い電場印加を行
わずに冷却することで結晶相へ変化さ・ｌる。しかし、
膜状の記録面を有するために透明部分と不透明部分の遷
移領域は広くなり、境界が不明瞭で記録密度が低く且つ
透明部分と不透明部分の濃度差が少ないという問題点が
ある。By cooling while maintaining the applied electric field, the homeo(-ropinok state) is maintained even when no electric field is applied.When erasing information, light irradiation is performed in the same way as when recording, and cooling is performed without applying an electric field. It changes to a crystalline phase.However,
Since it has a film-like recording surface, the transition area between the transparent and opaque areas is wide, resulting in an unclear boundary, low recording density, and a problem that the difference in density between the transparent and opaque areas is small.
［発明が解決しようとする課題］
以上のように、従来技術においては記録面が連続的な膜
状であることに起因する記録情報の不明瞭さという問題
点があった。[Problems to be Solved by the Invention] As described above, the conventional technology has a problem in that the recorded information is unclear due to the recording surface being in the form of a continuous film.
〔課題を解決するための手段］
すなわち、本発明は、等方的転移温度がガラス転移温度
より高い結晶状態の高分子液晶を主体とする光熱記録体
が正および負電極に挟持されてなる可逆的記録媒体であ
って、上記光熱記録体が粒状に樹脂中に分散されてなる
ことを特徴とする可逆的記録媒体である。[Means for Solving the Problems] That is, the present invention provides a reversible recording medium in which a photothermal recording material mainly composed of a polymeric liquid crystal in a crystalline state with an isotropic transition temperature higher than a glass transition temperature is sandwiched between positive and negative electrodes. The present invention is a reversible recording medium characterized in that the photothermal recording medium is dispersed in a resin in the form of particles.
言いかえると、本発明は、結晶状態にある高分子液晶を
主体とする光熱記録媒体を微小な粒状とし、樹脂中に分
散させてなる構造を有し上記光熱記録媒体を正負電極に
挟持させてなる可逆的記録媒体であり、本発明において
は、光熱記録媒体が結晶相状態の高分子液晶と色素から
なる混合物であっても良い。In other words, the present invention has a structure in which a photothermal recording medium mainly composed of polymeric liquid crystal in a crystalline state is made into minute particles and dispersed in a resin, and the photothermal recording medium is sandwiched between positive and negative electrodes. In the present invention, the photothermal recording medium may be a mixture of a polymer liquid crystal in a crystal phase state and a dye.
本発明にあイる請求項（２）の光熱記録媒体の製法を以
下に述べる。The method for manufacturing the photothermal recording medium according to claim (2) of the present invention will be described below.
高分子化すると高分子液晶となる性質を持つ高分子液晶
の前駆体と、紫外線または電子線硬化型の樹脂オリゴマ
ーもしくは七ツマ−またはそれらの混合物と、さらに記
録時のレーザ等の光の波長に吸収スペクトルを持つ色素
を前駆体の透明点より僅かに高い温度に保って溶体を作
る。溶体をデイピング等の方法で基板上に皮膜とした後
、ゆっくりと冷却して前駆体がネマチック相を呈する温
度で一定に保持すると、前駆体と樹脂の熔解性が低下し
て前駆体がサブミクロンオーダーの粒状物質として樹脂
中に析出してくる。この状態で紫外線または電子線を照
射し、樹脂の架橋反応を生しさせることによってマトリ
ックスを形成させ、同時に粒状の前駆体も高分子化され
粒内に色素を含有する粒状光熱記録媒体を形成する。A polymer liquid crystal precursor that has the property of becoming a polymer liquid crystal when polymerized, an ultraviolet or electron beam-curable resin oligomer or a 7-mer, or a mixture thereof, and a wavelength of light such as a laser during recording. A solution is created by holding a dye with an absorption spectrum at a temperature slightly higher than the clearing point of the precursor. After the solution is formed into a film on the substrate by a method such as dipping, if it is slowly cooled and held at a constant temperature at which the precursor exhibits a nematic phase, the solubility of the precursor and resin decreases and the precursor becomes submicron. It precipitates into the resin as particulate matter of the order of magnitude. In this state, ultraviolet rays or electron beams are irradiated to cause a crosslinking reaction of the resin to form a matrix, and at the same time, the granular precursor is also polymerized to form a granular photothermal recording medium containing dye inside the granules. .
常温では高分子化された液晶と樹脂の屈折率に差がある
ので光りの散乱によりヘイズ率で８０程度の白濁した皮
膜が得られる。高分子液晶はガラス温度を有するのでガ
ラス温度以上の透明状態例えばホメオトロピックなネマ
チック相あるいは等吉相からガラス温度以下に急冷する
か、ホメオトロピ、り相を保つように電場を印加しなが
らガラス温度以下にすると透明な状態を固定化できる。At room temperature, there is a difference in refractive index between the polymerized liquid crystal and the resin, so a cloudy film with a haze factor of about 80 is obtained due to light scattering. Polymer liquid crystals have a glass temperature, so they can be rapidly cooled from a transparent state above the glass temperature, such as a homeotropic nematic phase or an isotonic phase, to below the glass temperature, or cooled below the glass temperature while applying an electric field to maintain the homeotropic or nematic phase. Then, the transparent state can be fixed.
逆に電場を印加せずに透明状態からゆっくりガラス温度
以下にすると白濁状態が形成出来る。Conversely, if the temperature is slowly lowered from a transparent state to below the glass temperature without applying an electric field, a cloudy state can be formed.
上記製法は高分子液晶と樹脂成分の相互熔解性が低い場
合に有効であるが、高分子液晶自身が樹脂成分と透明点
以上の温度で熔解する場合には前駆体を使う必要はない
。単に高分子液晶と樹脂のの混合物を液晶の透明点以上
の温度に保って紫外線または電子線を照射し、樹脂の架
橋反応を生しさせることによってマトリックスを形成さ
せ、粒状の高分子液晶を析出させることも可能である。The above production method is effective when the mutual solubility of the polymeric liquid crystal and the resin component is low, but when the polymeric liquid crystal itself melts with the resin component at a temperature above the clearing point, there is no need to use a precursor. Simply maintain a mixture of polymer liquid crystal and resin at a temperature above the clearing point of the liquid crystal and irradiate it with ultraviolet rays or electron beams to cause a crosslinking reaction in the resin, forming a matrix and precipitating granular polymer liquid crystals. It is also possible to do so.
［発明の詳細な
説明の実施例を示す第１図に基いて、説明すると、ガラ
ス等の透明基板の片面に、透明電極０［Ｉ）、記録媒体
層θ湯、対向電極（ＩＩ）をこの順に積層したものであ
って、記録媒体Ｎｏ３）は、粒状の高分子液晶圓を分散
さ−Ｕた樹脂マトリックス０２）からなる。[Based on FIG. 1 which shows an embodiment of the detailed description of the invention, to explain, a transparent electrode 0[I], a recording medium layer θ, and a counter electrode (II) are placed on one side of a transparent substrate such as glass. The recording medium No. 3) is made of a resin matrix 02) in which granular polymeric liquid crystal circles are dispersed.
本発明に用いる高分子液晶の前駆体は次の一般式、
ＣＨ２＝ＣＨ
Ｃ−〇−Ｒ
で表されるアクリル酸エステルであり液晶性を示すもの
である。式中、Ｒは、具体的には、４−シアノ−４°−
ｎ−ペンチルオキシビフェニル基、４−シアノ−４−〇
−へキシルオキシビフェニル基、４−シアノ−４−ｎ−
へブチルオキシビフェニル基、４−シアノ−４−ｎ−オ
クチルオキソビフェニル基、４−シアノ−４” −ｎ−
ペンクオキシフェニル基、４−シアノ−４° −ｎ−へ
キサオキソビフェニル基、４−シアノ−４“ −ｎヘプ
クオキシビフェニル基、４−シアノ−４０−オクタオキ
シビフェニル基、４−シアノ４゛−ｎ−ペンチルターフ
ェニル基、をあげることができる。The polymer liquid crystal precursor used in the present invention is an acrylic ester represented by the following general formula, CH2=CH C--R, and exhibits liquid crystallinity. In the formula, R is specifically 4-cyano-4°-
n-pentyloxybiphenyl group, 4-cyano-4-〇-hexyloxybiphenyl group, 4-cyano-4-n-
Hebutyloxybiphenyl group, 4-cyano-4-n-octyloxobiphenyl group, 4-cyano-4''-n-
Penkoxyphenyl group, 4-cyano-4°-n-hexoxobiphenyl group, 4-cyano-4"-n-hexoxybiphenyl group, 4-cyano-40-octaoxybiphenyl group, 4-cyano 4" -n-pentylterphenyl group.
高分子媒体を構成する紫外線または電子線の照射、ある
いは熱による重合可能なオリゴマーまたは七ツマ−とし
ては、具体的にはペンタエリスルトールトリアクリレー
ト、ペンタエリスリト−ルトリメタクリレート、ペンタ
エリスリトールテトラアクリレート、ペンタエリスリト
ールテトラメタクリレート、トリメチルプロパントリア
クリレート、ヘキサンジオール−１，６−シメタクリレ
ート、トリエチレングリコールジアクリレート、あるい
はこれらの混合物等をあげることができる。Examples of oligomers or septamers that can be polymerized by ultraviolet rays or electron beam irradiation or heat, which constitute the polymeric medium, include pentaerythritol triacrylate, pentaerythritol trimethacrylate, pentaerythritol tetraacrylate, Examples include pentaerythritol tetramethacrylate, trimethylpropane triacrylate, hexanediol-1,6-cymethacrylate, triethylene glycol diacrylate, and mixtures thereof.
本発明に用いる材料の高分子媒体の含有量は、液晶：高
分子媒体の重量比で１＝２から４；１までの範囲をとる
ことが可能であり、好ましくはｌ：１から３：ｌの範囲
である。The content of the polymeric medium in the material used in the present invention can range from 1=2 to 4:1 in weight ratio of liquid crystal to polymeric medium, preferably from 1:1 to 3:1. is within the range of
液晶と混合される色素としてはシアニン系色素をあげる
ことができる０本発明に用いる色素の量は、液晶二色素
の重量比で約１：１００から１）０までの範囲をとるこ
とが可能であり、好ましくはｌ：５０から１：１０の範
囲である。Examples of the dye to be mixed with the liquid crystal include cyanine dyes.The amount of the dye used in the present invention can range from about 1:100 to 1:0 in weight ratio of the liquid crystal two dyes. The ratio is preferably from 1:50 to 1:10.
本発明の高分子媒体に使用するオリゴマーまたはモノマ
ーには、所望に応して公知の重合開始剤を用いてもよい
。For the oligomer or monomer used in the polymeric medium of the present invention, a known polymerization initiator may be used, if desired.
［作用］
微小な粒状の光熱記録媒体とすることで単一の粒状光熱
記録媒体中では温度は均一となるため記録媒体中の透明
、不透明部分は明瞭に分離されその遷移領域もたかだか
１粒子分の領域に納まる。[Function] Since the temperature is uniform within a single granular photothermal recording medium, the transparent and opaque portions of the recording medium are clearly separated, and the transition area is at most one grain size. It falls within the range of
したがって、記録情報が、明瞭に識別しやすくなる。濃
度差も樹脂部分と粒状の高分子液晶の屈折率の差で決ま
る散乱が加わり、高分子液晶だけからなるフィルムより
大幅に増加する。また高分子液晶と混合する色素によっ
て、マトリックスを形成する樹脂を破壊する波長および
強度のレーザ等の光を必ずしも使用する必要がなくなり
、また波長、強度の選択が可能である。さらに、膜状の
光熱記録媒体に比べ、使用する液晶の量は少なく、安価
に製造することができる。Therefore, recorded information becomes easier to clearly identify. The concentration difference is also significantly increased compared to a film made only of polymer liquid crystals due to the addition of scattering determined by the difference in refractive index between the resin portion and the granular polymer liquid crystal. Furthermore, the dye mixed with the polymeric liquid crystal eliminates the need to necessarily use light such as a laser with a wavelength and intensity that destroys the resin forming the matrix, and the wavelength and intensity can be selected. Furthermore, compared to a film-like photothermal recording medium, the amount of liquid crystal used is small and can be manufactured at low cost.
［発明の効果］
樹脂中に分散する粒状高分子液晶を記録に用いるため、
レーザ等の照射による加熱部位は照射部より外部に発散
することがなく透明、不透明部は明瞭に分離できる。そ
の結果、記録する情報の正確さが確保される。また、高
分子液晶に添加した色素によって照射する光の波長、強
度に対し選択性を得ることができる。さらに使用する高
分子液晶は樹脂中に分散されない場合と比較して少量で
あるため安価に製造ができる。[Effect of the invention] Since granular polymer liquid crystals dispersed in resin are used for recording,
The heated area caused by laser irradiation does not radiate outward from the irradiated area, and the transparent and opaque areas can be clearly separated. As a result, the accuracy of recorded information is ensured. Furthermore, the dye added to the polymeric liquid crystal can provide selectivity to the wavelength and intensity of the irradiated light. Furthermore, since the amount of polymer liquid crystal used is small compared to the case where it is not dispersed in the resin, it can be manufactured at low cost.
［実施例］
本発明は、高分子液晶を用いて熱的、光電気的効果を利
用して書換えを可能とした記録媒体を実現したもので、
以下にこの効果を実施例について説明する。[Example] The present invention realizes a recording medium that can be rewritten using thermal and photoelectric effects using polymer liquid crystal.
This effect will be explained below with reference to examples.
実施例
シアノビフェニル系高分子液晶の前駆体（式ｌ）にオリ
ゴエステルアクリレート（東亜合成化学工業製：商品名
Ｍ８０３０）（式２）
および一般式（式３）で表せられるアクリレート（東曲
合成化学工業製；商品名Ｍ３１５）（Ａ、アクリル酸、
Ｘ：多価アルコール、Ｙ：多塩基酸を表し、ｍ＝０〜２
である。）
の重量比１：１〜１：１．５の混合体を加え、さらに半
導体レーザ（波長７８０ ｎｍ）による記録、消去を可
能とするため、赤外吸収色素（三井東圧製：商品名ＰＡ
−１００６）を添加し温度を１）０度に保って−様な溶
体とした。なお付は加えれば１式１で表される前駆体は
高分子化すると次の−ｔＣ式で表されるガラス温度が５
５度、ｉ３明点が１０６度の高分子液晶となることが判
明している。Example A precursor of a cyanobiphenyl polymer liquid crystal (formula 1) was added to an oligoester acrylate (manufactured by Toagosei Chemical Industry Co., Ltd., trade name M8030) (formula 2) and an acrylate represented by the general formula (formula 3) (Tokyoku Gosei Chemical Co., Ltd.) Industrially manufactured; trade name M315) (A, acrylic acid,
X: polyhydric alcohol, Y: polybasic acid, m = 0 to 2
It is. ) in a weight ratio of 1:1 to 1:1.5, and in order to enable recording and erasing with a semiconductor laser (wavelength: 780 nm), an infrared absorbing dye (manufactured by Mitsui Toatsu: trade name PA) was added.
-1006) was added and the temperature was kept at 1) 0 degrees to form a --like solution. In addition, when the precursor represented by formula 1 is made into a polymer, the glass temperature represented by the following -tC formula increases to 5.
It has been found that the polymer liquid crystal has an i3 bright point of 106 degrees and an i3 bright point of 106 degrees.
０
この溶体にあらかしめ１２００オングストローム厚のイ
ンジウム−スズ酸化物透明電極を蒸着したガラス基板を
デインピングして約２０μｍの厚さの皮膜を形成した。0 A glass substrate on which a 1200 angstrom thick indium-tin oxide transparent electrode was deposited was deimped into this solution to form a film about 20 μm thick.
約７０度のオーブンに入れ１時間程度保持すると樹脂中
に前駆体がネマチック相として析出して白濁した皮膜が
形成された。これに樹脂部分の架橋反応と前駆体の高分
子化が完了するまで紫外線を照射した。さらに皮膜上に
アルミニウムを０．２μｍ厚に真空蒸着し対向電極とし
た。When placed in an oven at about 70 degrees Celsius and kept for about one hour, the precursor precipitated in the resin as a nematic phase, forming a cloudy film. This was irradiated with ultraviolet rays until the crosslinking reaction of the resin portion and polymerization of the precursor were completed. Furthermore, aluminum was vacuum-deposited on the film to a thickness of 0.2 μm to form a counter electrode.
こうして得られた皮膜にレーザー光を照射して局所的に
透明状態を形成した場合にも、オーブン等に入れて全体
を透明にした場合にも、約１００■ｐ−ρの交流を印加
したまま室温まで冷却したところ透明状態が維持され、
電圧を印加せずに冷却すると強く白濁した状態が得られ
可逆性のある記録媒体として有効であることが確認され
た。Whether the film obtained in this way is irradiated with laser light to form a locally transparent state, or placed in an oven etc. to make the entire film transparent, an alternating current of approximately 100 μp-ρ is applied. When cooled to room temperature, it remained transparent,
When cooled without applying a voltage, a strongly cloudy state was obtained, confirming that it is effective as a reversible recording medium.
第１図は、本発明の可逆的記録媒体の一実施例を示す断
面図であり、第２図は、従来の記録媒体の一例を示す断
面図である。
ｌ Ｏ・
１
１２ ・
３
４
１６ ・
・ガラス基板上の透明電極
・対向電極
・樹脂マトリックス
・記録媒体層
・高分子液晶
・基板FIG. 1 is a sectional view showing an embodiment of a reversible recording medium of the present invention, and FIG. 2 is a sectional view showing an example of a conventional recording medium. l O・ 1 12 ・ 3 4 16 ・ ・Transparent electrode on glass substrate・Counter electrode・Resin matrix・Recording medium layer・Polymer liquid crystal・Substrate
Claims (3)
態の高分子液晶を主体とする光熱記録体が正および負電
極に挟持されてなる可逆的記録媒体であって、上記光熱
記録体が粒状に樹脂中に分散されてなることを特徴とす
る可逆的記録媒体。(1) A reversible recording medium comprising a photothermal recording material mainly composed of a polymer liquid crystal in a crystalline state with an isotropic transition temperature higher than the glass transition temperature, which is sandwiched between positive and negative electrodes, wherein the photothermal recording material is sandwiched between positive and negative electrodes. A reversible recording medium characterized by being dispersed in a resin in the form of particles.
樹脂中に粒状に分散させた後、高分子化されたものであ
ることを特徴とする請求項（１）記載の可逆的記録媒体
。(2) The reversible polymer liquid crystal according to claim (1), wherein the polymer liquid crystal in a crystalline state is obtained by dispersing a precursor of the polymer liquid crystal into particles in a resin and then polymerizing the polymer liquid crystal. recoding media.
合物であることを特徴とする請求項（１）記載の可逆的
記録媒体。(3) The reversible recording medium according to claim (1), wherein the photothermal recording medium is a mixture of a crystalline polymer liquid crystal and a dye.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2086215A JPH03284988A (en) | 1990-03-31 | 1990-03-31 | Reversible recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2086215A JPH03284988A (en) | 1990-03-31 | 1990-03-31 | Reversible recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03284988A true JPH03284988A (en) | 1991-12-16 |
Family
ID=13880559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2086215A Pending JPH03284988A (en) | 1990-03-31 | 1990-03-31 | Reversible recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03284988A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5891357A (en) * | 1995-09-27 | 1999-04-06 | Fuji Xerox Co., Ltd. | Optical element and method of manufacturing the same, and macromolecular liquid crystal for an optical element |
| JP2016065224A (en) * | 2014-09-23 | 2016-04-28 | ザ・ボーイング・カンパニーＴｈｅ Ｂｏｅｉｎｇ Ｃｏｍｐａｎｙ | Nanoparticles for improving dimensional stability of resins |
| US10465051B2 (en) | 2014-09-23 | 2019-11-05 | The Boeing Company | Composition having mechanical property gradients at locations of polymer nanoparticles |
| US10472472B2 (en) | 2014-09-23 | 2019-11-12 | The Boeing Company | Placement of modifier material in resin-rich pockets to mitigate microcracking in a composite structure |
| US10662302B2 (en) | 2014-09-23 | 2020-05-26 | The Boeing Company | Polymer nanoparticles for improved distortion capability in composites |
| US10995187B2 (en) | 2014-09-23 | 2021-05-04 | The Boeing Company | Composite structure having nanoparticles for performance enhancement |
-
1990
- 1990-03-31 JP JP2086215A patent/JPH03284988A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5891357A (en) * | 1995-09-27 | 1999-04-06 | Fuji Xerox Co., Ltd. | Optical element and method of manufacturing the same, and macromolecular liquid crystal for an optical element |
| JP2016065224A (en) * | 2014-09-23 | 2016-04-28 | ザ・ボーイング・カンパニーＴｈｅ Ｂｏｅｉｎｇ Ｃｏｍｐａｎｙ | Nanoparticles for improving dimensional stability of resins |
| US10465051B2 (en) | 2014-09-23 | 2019-11-05 | The Boeing Company | Composition having mechanical property gradients at locations of polymer nanoparticles |
| US10472472B2 (en) | 2014-09-23 | 2019-11-12 | The Boeing Company | Placement of modifier material in resin-rich pockets to mitigate microcracking in a composite structure |
| US10662302B2 (en) | 2014-09-23 | 2020-05-26 | The Boeing Company | Polymer nanoparticles for improved distortion capability in composites |
| US10808123B2 (en) | 2014-09-23 | 2020-10-20 | The Boeing Company | Nanoparticles for improving the dimensional stability of resins |
| US10995187B2 (en) | 2014-09-23 | 2021-05-04 | The Boeing Company | Composite structure having nanoparticles for performance enhancement |
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