JP2004115938A - Image-forming material and method for producing image-forming material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing an image-forming material, by which the image-forming material having excellent water resistance, excellent surface smoothness and good gloss can efficiently be produced. <P>SOLUTION: This method for producing the image-forming material, comprising coating a substrate with a thermoplastic resin latex-containing liquid containing at least a thermoplastic resin latex to form the coating film, bringing the coating film into contact with the surface of a belt member, and then peeling the formed image-forming material from the belt member, is characterized in that the surface temperature of the belt member on the contacting of the coating film with the surface of the belt member is higher than the lowest film-forming temperature of the thermoplastic resin latex-containing liquid, and that the melt viscosity [preserved elastic modulus (G')] of the coating film on the peeling is ≥0.1 MPa. <P>COPYRIGHT: (C)2004,JPO

Description

【０１４６】
ここで、上記式（１）において、Ｒ^１０は非置換又は置換の好ましくは炭素数１〜８の一価炭化水素基であり、好ましくは炭素数１〜８のアルキル基又は炭素数２〜３のアルケニル基であり、特にメチル基であることが好ましい。ａ，ｅはそれぞれ０又は１、ｂ，ｄはそれぞれ１〜４の整数、ｃは０〜８の整数である。また、ｘは１以上の整数、好ましくは１０〜３０である。
【０１４７】
このような（Ａ）成分としては、下記式（２）で示すものを挙げることができる。
【０１４８】
【化２】

【０１４９】
（Ｂ）成分において、≡ＳｉＨ基を有するオルガノポリシロキサンとしては、ケイ素原子に結合した水素原子を分子中に少なくとも２個有するオルガノハイドロジェンポリシロキサンを挙げることができる。
【０１５０】
また、本発明で用いるフルオロカーボンシロキサンゴム組成物においては、（Ａ）成分のフルオロカーボンポリマーが脂肪族不飽和基を有するものであるときには、硬化剤として上述したオルガノハイドロジェンポリシロキサンを使用することができる。即ち、この場合には、フルオロカーボンシロキサン中の脂肪族不飽和基と、オルガノハイドロジェンポリシロキサン中のケイ素原子に結合した水素原子との間で生ずる付加反応によって硬化物が形成されるものである。
【０１５１】
このようなオルガノハイドロジェンポリシロキサンとしては、付加硬化型のシリコーンゴム組成物に使用される種々のオルガノハイドロジェンポリシロキサンを使用することができる。
【０１５２】
上述したオルガノハイドロジェンポリシロキサンは、一般にその≡ＳｉＨ基の数が、（Ａ）成分のフルオロカーボンシロキサン中の脂肪族不飽和炭化水素基１個に対して、少なくとも１個、特に１〜５個となるような割合で配合することが好適である。
【０１５３】
また、≡ＳｉＨ基を有するフルオロカーボンとしては、上記式（１）の単位又は式（１）においてＲ^１０がジアルキルハイドロジェンシロキシ基であり、かつ末端がジアルキルハイドロジェンシロキシ基又はシリル基等のＳｉＨ基であるものが好ましく、下記式（３）で示すものを挙げることができる。
【０１５４】
【化３】

【０１５５】
（Ｃ）成分の充填剤としては、一般的なシリコーンゴム組成物に使用されている種々の充填剤を用いることができる。例えば、煙霧質シリカ、沈降性シリカ、カーボン粉末、二酸化チタン、酸化アルミニウム、石英粉末、タルク、セリサイト及びベントナイト等の補強性充填剤、アスベスト、ガラス繊維、有機繊維等の繊維質充填剤などを例示することができる。
【０１５６】
（Ｄ）成分の触媒としては、付加反応用触媒として公知とされている塩化白金酸、アルコール変性塩化白金酸、塩化白金酸とオレフィンとの錯体、白金黒又はパラジウムをアルミナ、シリカ、カーボンなどの担体に担持したもの、ロジウムとオレフィンとの錯体、クロロトリス（トリフェニルフォスフィン）ロジウム（ウィルキンソン触媒）、ロジウム（ＩＩＩ）アセチルアセトネートなどのような周期律表第ＶＩＩＩ族元素又はその化合物が例示されるが、これらの錯体はアルコール系、エーテル系、炭化水素などの溶剤に溶解して用いることが好ましい。
【０１５７】
本発明で用いるフルオロカーボンシロキサンゴム組成物においては、耐溶剤性を向上させるという本発明の目的を損なわない範囲において、種々の配合剤を添加することができる。例えば、ジフェニルシランジオール、低重合度の分子鎖末端水酸基封鎖ジメチルポリシロキサン、ヘキサメチルジシラザン等の分散剤、酸化第一鉄、酸化第二鉄、酸化セリウム、オクチル酸鉄等の耐熱性向上剤、顔料等の着色剤等を必要に応じて配合することができる。
【０１５８】
前記本発明の定着用ベルトは、耐熱性樹脂製又は金属製のベルト本体の表面を上記フルオロカーボンシロキサンゴム組成物で被覆し、加熱硬化することによって得られるが、必要に応じて更に、ｍ−キシレンヘキサフロライド、ベンゾトリフロライド等の溶剤で希釈して塗工液とし、スプレーコート、ディップコート及びナイフコート等の一般的なコーティング法によって塗布することができる。また、加熱硬化の温度、時間は適宜選定することができ、通常温度１００〜５００℃、時間５秒〜５時間の範囲でベルト本体の種類及び製造方法などに応じて選択される。
【０１５９】
前記定着ベルトの表面に形成するフルオロカーボンシロキサンゴム層の厚さは特に限定されるものではないが、トナーの剥離性或いはトナー成分のオフセットを防止して画像の良好な定着性を得るために２０〜５００μｍ、特に４０〜２００μｍが好ましい。
【０１６０】
本発明の電子写真用受像シートに画像を形成する方法は、定着ベルトを使用した電子写真方法であれば、上記、特に図１に示した方法に制限されるものではない。通常の電子写真法であれば、いずれも適用することができる。
例えば、本発明の電子写真用受像シートには、カラー画像を好ましく形成することができる。カラー画像の形成は、フルカラー画像を形成し得る電子写真装置を用いて行うことができる。通常の電子写真装置は、受像シート搬送部と、潜像形成部と、潜像形成部に近接して配設されている現像部とがあり、機種によっては、装置本体の中央に潜像形成部と受像シート搬送部に近接してトナー像中間転写部を有している。
【０１６１】
更に、画質の向上を図るための方法として、静電転写或いはバイアスローラ転写に代わって、或いは併用して、粘着転写又は熱支援型の転写方式が知られている。例えば、特開昭６３−１１３５７６号公報及び特開平５−３４１６６６号公報にはその具体的な構造が記載されている。特に熱支援型転写方式の中間転写ベルトを用いた方法は、小粒径のトナーを使用する場合には好ましい。
【０１６２】
本発明の画像形成方法によれば、定着オイルのないオイルレス機を使用しても、受像シート及びトナーの剥離性、或いは受像シート及びトナー成分のオフセットを防止でき、安定した給紙を実現できると共に、これまでにない良好な光沢性を有し、写真感覚に富む、良好な画像を実現できる。
【０１６３】
以上により、前記電子写真受像シートに前記電子写真用トナーによる画像、前記電子写真用カラートナーによるカラー画像が形成される。
【０１６４】
＜感熱材料＞
前記感熱材料としては、例えば、本発明の前記画像形成用材料上に、少なくとも画像形成層としての熱溶融性インク層を設けた構成を有し、感熱ヘッドにより加熱して熱溶融性インク層からインクを感熱転写記録用受像シート上に溶融転写する方式において用いられる感熱転写シートや、本発明の前記画像形成用材料上に、少なくとも熱拡散性色素（昇華性色素）を含有するインク層を設けた構成を有し、感熱ヘッドにより加熱してインク層から熱拡散性色素を感熱転写記録受像シート上に転写する昇華転写方式に用いられる感熱転写シート、本発明の前記画像形成用材料上に、少なくとも熱発色層を設けた構成を有し、感熱ヘッドによる加熱と紫外線による定着の繰り返しにより画像を形成するサーモオートクローム方式（ＴＡ方式）において用いられる感熱材料等が挙げられる。
【０１６５】
＜書き換え可能な表示材料（電子ペーパー）＞
前記書き換え可能な表示材料としては、電子ペーパーが特に好ましい。該電子ペーパーとしては、例えば、本発明の前記画像形成用材料を支持体として用い、エレクトロクロミック素子を利用したＥＣ素子型、電気泳動を利用した電気泳動型、ツイストボール型等が挙げられる。これらの中でも、特に、視野角依存性に優れ、構造が簡易であるため大型化が容易で、材料の選択により多様な色調が得られ、電子の移動を遮断し酸化還元状態を保持するだけで表示状態を静止できるためメモリー性に優れ、しかもその表示状態を維持するのに電力が不要であるので消費電力が低い、等の種々の利点があるため、ＥＣ素子型が最も好ましい。
【０１６６】
＜＜ＥＣ素子型電子ペーパー＞＞
前記ＥＣ素子型電子ペーパーとしては、本発明の前記画像形成用材料上に、少なくとも、エレクトロクロミック着色層を把持する一対の電極からなる構成のＥＣ素子を有するのが好ましい。
【０１６７】
前記エレクトロクロミック着色層としては特に制限はなく、通常公知のエレクトロクロミック色素、電解質等を用いることができる。
【０１６８】
前記エレクトロクロミック色素としては、電気化学的な酸化反応及び還元反応の少なくとも一方により発色又は消色する作用を示す限り特に制限はなく、目的に応じて適宜選択することができ、例えば、有機化合物、金属錯体などが好適に挙げられる。これらは、１種単独で使用してもよいし、２種以上を併用してもよい。
【０１６９】
前記金属錯体としては、例えば、プルシアンブルー、金属−ビピリジル錯体、金属フェナントロリン錯体、金属−フタロシアニン錯体、メタフェリシアニド、これらの誘導体などが挙げられる。
【０１７０】
前記有機材料としては、例えば、（１）ピリジン化合物類、（２）導電性高分子類、（３）スチリル化合物類、（４）ドナー／アクセプター型化合物類、（５）その他有機色素類、などが挙げられる。
【０１７１】
前記（１）ピリジン化合物類としては、例えば、ビオローゲン、ヘプチルビオローゲン（ジヘプチルビオローゲンジブロミド等）、メチレンビスピリジニウム、フェナントロリン、アゾビピリジニウム、２，２−ビピリジニウム錯体、キノリン・イソキノリン、などが挙げられる。
【０１７２】
前記（２）導電性高分子類としては、例えば、ポリピロール、ポリチオフェン、ポリアニリン、ポリフェニレンジアミン、ポリアミノフェノール、ポリビニルカルバゾール、高分子ビオローゲンポリイオンコンプレックス、ＴＴＦ、これらの誘導体などが挙げられる。
【０１７３】
前記（３）スチリル化合物類としては、例えば、２−［２−［４−（ジメチルアミノ）フェニル］エテニル］−３，３−ジメチルインドリノ［２，１−ｂ］オキサゾリジン、２−［４−［４−（ジメチルアミノ）フェニル］−１，３−ブタジエニル］−３，３−ジメチルインドリノ［２，１−ｂ］オキサゾリジン、２−［２−［４−（ジメチルアミノ）フェニル］エテニル］−３，３−ジメチル−５−メチルスルホニルインドリノ［２，１−ｂ］オキサゾリジン、２−［４−［４−（ジメチルアミノ）フェニル］−１，３−ブタジエニル］−３，３−ジメチル−５−スルホニルインドリノ［２，１−ｂ］オキサゾリジン、３，３−ジメチル−２−［２−（９−エチル−３−カルバゾリル）エテニル］インドリノ［２，１−ｂ］オキサゾリジン、２−［２−［４−（アセチルアミノ）フェニル］エテニル］−３，３−ジメチルインドリノ［２，１−ｂ］オキサゾリジン、などが挙げられる。
【０１７４】
前記（４）ドナー／アクセプター型化合物類としては、例えば、テトラシアノキノジメタン、テトラチアフルバレン、などが挙げられる。
【０１７５】
前記（５）その他有機色素類としては、例えば、カルバゾール、メトキシビフェニル、アントラキノン、キノン、ジフェニルアミン、アミノフェノール、Ｔｒｉｓ−アミノフェニルアミン、フェニルアセチレン、シクロペンチル化合物、ベンゾジチオリウム化合物、スクアリウム塩、シアニン、希土類フタロシアニン錯体、ルテニウムジフタロシアニン、メロシアニン、フェナントロリン錯体、ピラゾリン、酸化還元指示薬、ｐＨ指示薬、これらの誘導体、などが挙げられる。
【０１７６】
これらの中でも、ビオローゲン、ヘプチルビオローゲン（ジヘプチルビオローゲンジブロミド等）などのビオローゲン系色素が好適である。
【０１７７】
前記エレクトロクロミック色素を２種以上併用する場合の組合せとしては、特に制限はなく、目的に応じて適宜選択することができるが、例えば、ビオローゲンとポリアニリンとの組合せ、ポリピロールとポリメチルチオフェンとの組合せ、ポリアニリンとプルシアンブルーとの組合せ、などが挙げられる。
【０１７８】
前記電解質としては、例えば、ヨウ素、臭素、ＬｉＩ、ＮａＩ、ＫＩ、ＣｓＩ、ＣａＩ_２、ＬｉＢｒ、ＮａＢｒ、ＫＢｒ、ＣｓＢｒ、ＣａＢｒ_２等の金属ハロゲン化物、ヨウ化テトラエチルアンモニウム、ヨウ化テトラプロピルアンモニウム、ヨウ化テトラブチルアンモニウム、臭化テトラメチルアンモニウム、臭化テトラエチルアンモニウム、臭化テトラブチルアンモニウム等のアンモニウム化合物のハロゲン化塩、メチルビオロゲンクロリド、ヘキシルビオロゲンブロミド等のアルキルビオロゲン、ハイドロキノン、ナフトハイドロキノン等のポリヒドロキシベンゼン、フェロセン、フェロシアン酸塩等の鉄錯体等の少なくとも１種を用いることができるが、これらに限定されるものではない。
【０１７９】
＜印刷用紙＞
本発明の前記画像形成用材料は、印刷用紙として用いるのも好ましい。この場合、前記基体として紙を用い、基体側を印刷面として用いるのが好ましい。また本発明の画像形成用材料を印刷用紙として用いる場合には、印刷機械によりインク等を塗布する点から、機械強度が高いものが好ましい。
【０１８０】
前記基体として紙を用いる場合、紙に填料、柔軟剤、製紙用内添助剤等を含有させるのが好ましい。填料としては、一般に使用されているものが使用でき、例えば、クレー、焼成クレー、珪藻土、タルク、カオリン、焼成カオリン、デラミカオリン、重質炭酸カルシウム、軽質炭酸カルシウム、炭酸マグネシウム、炭酸バリウム、二酸化チタン、酸化亜鉛、酸化ケイ素、非晶質シリカ、水酸化アルミニウム、水酸化カルシウム、水酸化マグネシウム、水酸化亜鉛等の無機填料、尿素−ホルマリン樹脂、ポリスチレン樹脂、フェノール樹脂、微小中空粒子等の有機填料、などが挙げられる。これらは、１種単独で使用してもよく、２種以上を併用してもよい。
【０１８１】
前記製紙用内添助剤としては、例えば、従来から使用されている各種のノニオン性、カチオン性、アニオン性の歩留まり向上剤、濾水度向上剤、紙力向上剤、内添サイズ剤等が挙げられる。具体的には、硫酸バンド、塩化アルミニウム、アルミン酸ソーダ、塩基性塩化アルミニウム、塩基性ポリ水酸化アルミニウム等の塩基性アルミニウム化合物；硫酸第一鉄、硫酸第二鉄等の多価金属化合物、澱粉、加工澱粉、ポリアクリルアミド、尿素樹脂、メラミン樹脂、エポキシ樹脂、ポリアミド樹脂、ポリアミン樹脂、ポリアミン、ポリエチレンイミン、植物ガム、ポリビニルアルコール、ラテックス、ポリエチレンオキサイド等の水溶性高分子、親水性架橋ポリマー粒子分散物及びこれらの誘導体あるいは変成物等の各種化合物が例示でき、これらの物質は前記製紙用内添助剤としての機能のいくつかを同時に有するものである。
【０１８２】
次に、内添サイズ剤としての機能が著しいものとしては、アルキルケテンダイマー系化合物、アルケニル無水コハク酸系化合物、スチレン−アクリル系化合物、高級脂肪酸系化合物、石油樹脂系サイズ剤やロジン系サイズ剤が挙げられる。
【０１８３】
更に、染料、蛍光増白剤、ｐＨ調整剤、消泡剤、ピッチコントロール剤、スライムコントロール剤等の抄紙用内添剤を用途に応じて適宜添加してもよい。
【０１８４】
前記印刷用紙は、オフセット印刷用紙として特に好適であり、その他にも凸版印刷用紙、グラビア印刷用紙、電子写真用紙として使用することが可能である。
【０１８５】
以上説明した本発明の画像形成用材料の製造方法によれば、耐水性、表面平滑性に優れ、良好な光沢を有する本発明の画像形成用材料を効率的に製造可能である。本発明の画像形成用材料は、各種分野におけるシート材、支持体等として特に好適に使用可能である。
【０１８６】
【実施例】
以下、本発明の実施例について説明するが、本発明はこれらの実施例に何ら限定されるものではない。なお、以下において、「％」及び「部」は、それぞれ「質量％」及び「質量部」を表す。
【０１８７】
（実施例１）
−基体の調製−
広葉樹晒クラフトパルプ（ＬＢＫＰ）をディスクリファイナーで３００ｃｃ（カナダ標準ろ水度、Ｃ．Ｆ．Ｓ．）まで叩解し、繊維長０．５８ｍｍに調整した。このパルプ紙料に対して、パルプの質量に基づいて、以下の割合で添加剤を添加した。
・カチオン澱粉・・・・・・・・・・・・・・・１．２％
・アルキルケテンダイマー（ＡＫＤ）・・・・・・０．５％
・アニオンポリアクリルアミド・・・・・・・・０．３％
・エポキシ化脂肪族アミド（ＥＦＡ）・・・・・・０．２％
・ポリアミドポリアミンエピクロルヒドリン・・０．３％
なお、前記アルキルケテンダイマー（ＡＫＤ）におけるアルキル部分は、ベヘン酸を主体とする脂肪酸に由来しており、前記エポキシ化脂肪族アミド（ＥＦＡ）における脂肪酸部分は、ベヘン酸を主体とする脂肪酸に由来している。
【０１８８】
以上により得たパルプ紙料を、長網抄紙機により坪量１６５ｇ／ｍ^２である原紙を作製した。なお、長網抄紙機の乾燥ゾーンの中間でサイズプレス装置により、ポリビニルアルコール（ＰＶＡ）１．０ｇ／ｍ^２、ＣａＣｌ_２０．８ｇ／ｍ^２付着させた。そして、抄紙工程の最後においてソフトカレンダーを用いて密度を１．０１ｇ／ｃｍ^３に調整した。以上により得た基体（基紙）に対し、受像層を形成する側が金属ロール（表面温度：１４０℃）が接するようにしてこれを通した。以上により基体（厚み：１６０μｍ、表面平滑度（王研式平滑度）＝２６５秒、ステヒキト・サイズ度＝１２７秒、２０度光沢度＝０度、コブサイズ吸水度（ＪＩＳ　Ｚ　８７４１に準拠）（３００秒）＝３３．７ｇ／ｍ^２）を作製した。
【０１８９】
＜耐水性の評価＞
得られた画像形成用材料用支持体に対し、ＪＩＳ　Ｐ　８１４０で規定されるコブサイズ吸水度（３００秒）を測定したところ、３．２ｇ／ｍ^２であった。
尚、耐水性としては、実用上、コブサイズ吸水度（３００秒）で、５ｇ／ｍ^２未満であるのが望ましい。
【０１９０】
−画像形成用材料（支持体１）の作製−
得られた原紙裏面に、下記組成の熱可塑性樹脂ラテックス含有液（最低造膜温度（ＭＦＴ）＝３５℃）を６４ｇ／ｍ^２、バーコーターにて塗布し塗布膜を形成した。５０℃にて風乾した後、原紙表面に、同様にして熱可塑性樹脂ラテックス含有液を６４ｇ／ｍ^２塗布し塗布膜を形成して５０℃にて風乾した。その後表面をベルト側に配し、図１に示すような冷却剥離式の後処理機（エンドレスプレス）により処理した。この処理において、塗布膜及びベルト部材の表面を接触させる際のベルト部材の表面温度は１４５℃であった。また、剥離の際の塗布膜における表面温度は４５℃、このときの溶融粘度（保存弾性率（Ｇ’））は１ＭＰａ以上（３．５ＭＰａ）であった。
別途、塗布膜及びベルト部材の表面を接触させる際の塗布膜における表面温度を測定したところ、最大１１０℃まで加熱されていることが解った。この加熱最大温度における塗布膜の溶融粘度（保存弾性率（Ｇ’））は、０．３ＭＰａであった。
【０１９１】
＜熱可塑性樹脂ラテックス含有液の組成＞
・熱可塑性樹脂ラテックス（ダイセル化学社製アクアブリッド４６３５；アクリル樹脂、ソープフリー、固形分３５％、Ｔｇ＝６０℃、最低造膜温度（ＭＦＴ）＝３０℃）・・・・・・・・・・・・・・・・・・・・・１００ｇ
・アニオン界面活性剤（ＡＯＴ）・・・・・・・・・・・・・・・０．２５ｇ
・白色顔料分散物・・・・・・・・・・・・・・・・・・・・・・１０ｇ
（酸化チタン４０％、クラレ社製ＰＶＡ−２０５、５％、アニオン界面活性剤若干量含有）
・蛍光像白剤分散物・・・・・・・・・・・・・・・・・・・・・１ｇ
（チバガイギ社製、ＵＶＴＥＸ−ＯＢ、４６％、ノニオン及びアニオン界面活性剤若干量含有。）
【０１９２】
図２に示す冷却剥離式のベルト式処理機（エンドレスプレス）において、処理部１は、ベルト２と、加熱ローラ３と、加圧ローラ４と、テンションローラ５と、クリーニングローラ６と、冷却装置７と、搬送ローラ８とを備えている。
【０１９３】
ベルト２の内側には、ベルト２と一対のテンションローラ５とが配置されている。ベルト２は、加熱ローラ３と、加熱ローラ３と離れた位置に配された一対のテンションローラ５とにより、回転可能に張設されている。加圧ローラ４は、ベルト２と当接して加熱ローラ３と対向して配置されている。加圧ローラ４とベルト２との間は、加圧ローラ４と加熱ローラ３とにより加圧されており、ニップ部が形成されている。冷却装置７は、ベルト２の内側であって、ベルト２の回転方向における、上流側に位置する加熱ローラ３と下流側に位置するテンションローラ５との間に配置されている。
前記搬送ローラ８は、ベルト２を介して冷却装置７と対向するようにして２個配置されている。ここでは、２個の搬送ローラの間隔は、前記ニップ部と搬送ローラ８の１つとの距離、テンションローラ５と搬送ローラ８の他の１つとの距離と、略同じ長さである。クリーニングローラ６は、ベルト２を介して、加熱ローラ３における加圧ローラ４と対向する側とは反対側と対向して配置されている。前記クリーニングローラ６とベルト２との間は、クリーニングローラ６と加熱ローラ３とにより加圧されている。加熱ローラ３と、加圧ローラ４と、テンションローラ５と、クリーニングローラ６と、搬送ローラ８とは、互いに連動して回転し、ベルト２を回転させることができる。
前記処理部１において、ベルト２表面は、信越化学工業社製ＳＩＦＦＬにてコートされており、表面粗さ（算術平均粗さ（Ｒａ））は０．８μｍであった。
また、ローラ間の圧力（ニップ圧）は７．５ｋｇ／ｃｍ^２であった。
【０１９４】
＜表面平滑性・光沢度の評価＞
得られた画像形成用材料（支持体）に対し、ＪＩＳ　Ｚ　８７４１に基づいて２０度光沢度を測定したところ、３５度であった。
【０１９５】
＜耐水性の評価＞
得られた画像形成用材料用支持体に対し、ＪＩＳ　Ｐ　８１４０で規定されるコブサイズ吸水度（３００秒）を測定したところ、３．２ｇ／ｍ^２であった。なお、コブサイズ吸水度（３００秒）は、純水を試料と３００秒間接触させた際の吸水量を測定した値である。
【０１９６】
−受像層の作製・電子写真受像シートの作製−
下記組成の成分を混合・攪拌して、受像層用塗布液を調製した。得られた受像層用塗布液を、前記画像形成用材料（支持体）上にバーコーターを用いてポリエステル樹脂が５ｇ／ｍ^２になるように塗布し、電子写真受像シートを作製した。
【０１９７】
−−受像層用塗布液の組成−−
・ポリエステル樹脂水分散物・・・・・・・・・１００．０ｇ
（固形分３０％、ＫＺＡ−７０４９，ユニチカ製）
・アニオン界面活性剤（ＡＯＴ）・・・・・・・・・・・０．５ｇ
・ポリエチレンオキサイド増粘剤・・・・・・・・・・・３ｇ
・カルナバワックス分散物（固形分３０質量％）・・・・５ｇ
・イオン交換水・・・・・・・・・・・・・・８０ｍｌ
【０１９８】
＜カラー画像形成＞
製造した電子写真受像シートに対し、以下のようにしてカラー画像形成を行った。
カラー画像形成装置として、電子写真プリンタ（富士ゼロックス（株）製；ＤｏｃｕＣｅｎｔｒｅ　Ｃｏｌｏｒ　４００ＣＰ）を用いた。尚、該電子写真プリンタは、定着部を、図３に示すベルト定着器に代えて使用した。この電子写真プリンタを用いて、２３℃、５５％ＲＨの条件下、白地から最大濃度（黒）まで、段階的に濃度を変化させた灰色の長方形画像及び青色の長方形画像を形成した。そして、これらの画像形成後に、図３に示すベルト定着器により、画像形成面を上向きにして定着を行った。
【０１９９】
前記カラー画像形成装置は、静電潜像担持体と、静電潜像形成手段と、現像手段と、転写手段と、定着手段とを備えている。前記静電潜像形成手段は帯電器と露光器とを有し、前記現像手段はシアントナー、イエロートナー、マゼンタトナー、及びブラックトナーの各トナー用現像器を有し、前記転写手段は中間転写ベルトを有し、前記定着手段は前述した、図２に示す定着部を有する。
【０２００】
前記カラー画像形成装置においては、前記静電潜像形成手段により、長方形画像の静電潜像が形成される。前記現像手段により、シアン、イエロー、マゼンタ、ブラックの各色の電子写真用トナーを用いて前記長方形画像の静電潜像が現像されて、段階的に濃度を変化させた灰色の長方形画像及び青色の長方形画像が形成された。前記転写手段により、前記段階的に濃度を変化させた灰色の長方形画像及び青色の長方形画像が上記電子写真受像シートに転写される。前記定着手段により、上記電子写真受像シートに転写された、段階的に濃度を変化させた灰色の長方形画像及び青色の長方形画像が定着された。その結果、該電子写真受像シート上に、段階的に濃度を変化させた灰色の長方形画像及び青色の長方形画像が形成された。
【０２０１】
ここで、定着部１’においては、まず、前記段階的に濃度を変化させた灰色の長方形画像及び青色の長方形画像が受像層１０ａ’上に形成され、転写された電子写真受像シート１０’が、前記ニップ部に搬送されてきて、該ニップ部を通過する。電子写真受像シート１０’における受像層１０ａ’は、ベルト２’側に位置されている。
電子写真受像シート１０’における受像層表面に形成された前記灰色及び青色の長方形画像を構成する電子写真用トナーは、前記ニップ部を通過する際、加熱ローラ３’と加圧ローラ４’とによる押圧力によって、受像層１０ａ’にプレスされつつ、加熱ローラ３’からの熱によって溶融されて受像層１０ａ’に定着される。このとき、受像層１０ａ’における樹脂も溶融するので、溶融した前記電子写真用トナーと受像層１０ａ’とは、互いに強固に一体化した状態となる。次に、前記ニップ部を通過した電子写真受像シート１０’は、受像層１０ａ’及び前記灰色及び青色の長方形画像を構成する電子写真用トナーが溶融したままベルト２’の表面に張り付いた状態で冷却装置７側に搬送される。そして、電子写真受像シート１０’は、受像層１０ａ’が設けられていない裏面が搬送ローラ８’によってテンションローラ５’側に搬送される。このとき、電子写真受像シート１０’における受像層１０ａ’及び前記灰色及び青色の長方形画像を構成する電子写真用トナーは、冷却装置７によりベルト２’ごと冷却され、互いに一体化した状態で固化される。電子写真受像シート１０’は、テンションローラ５’が回転する位置でベルト２’から剥離される。
以上により、電子写真受像シート１０’における受像層１０ａ’の表面に、前記灰色及び青色の長方形画像を形成した。この受像層１０ａ’の表面は、ベルト２’の表面により平滑化されている。
【０２０２】
なお、電子写真受像シート１０’が剥離されたベルト２’は、次のテンションローラ５’により加熱ローラ３’側に回転され、加熱ローラ３’のところで、加熱ローラ３’と対向して配置されたクリーニングローラ６’により、その表面に付着している前記電子写真用トナー等の汚れが除去される。そして、クリーニングローラ６’により汚れが除去されたベルト２’は、次の定着処理が行われる。
【０２０３】
定着ベルト基材として、ポリイミド製のベース層上に東レ・ダウコーニング・シリコーン社製　シリコーンゴム用プライマーであるＤＹ３９−１１５を塗布後、風乾３０分の後、シリコーンゴム前駆体であるＤＹ３５−７９６ＡＢ　１００部とｎ−ヘキサン　３０部により調整した塗布液を浸漬塗布により塗膜を形成し、１２０℃で１０分の一次加硫を行い、シリコーンゴム４０μｍを得た。
このシリコーンゴム層上に、信越化学工業社製　フルオロカーボンシロキサンゴム前駆体であるＳＩＦＥＬ６１０　１００部とフッ素系溶媒（ｍ−キシレンヘキサフロライド、パーフロロアルカン、パーフロロ（２−ブチルテトラヒドロフラン）の混合溶剤）　２０部により調整した塗布液を浸漬塗布により塗膜を形成した後、１２０℃で１０分の一次加硫、１８０℃で４時間の二次加硫を行い、フルオロカーボンシロキサンゴムが２０μｍの膜厚を有する定着ベルトを用いた。
【０２０４】
＜カラー画像の評価＞
＜＜白地部光沢度の評価＞＞
カラー画像を形成した後、白地部における２０度光沢度を、前述と同様にして測定した。結果を表１に示す。
【０２０５】
＜＜うねり感の評価＞＞
カラー画像を形成した後の電子写真受像シートにおけるうねり感を、下記評価基準に従い目視にて評価した。結果を表１に示す。
【０２０６】
−うねり感の評価基準−
・○：画像形成に起因するうねりが全く観察されない。
・△：画像形成に起因するうねりがやや観察されるものの、実用上全く問題無いレベルである。
・×：画像形成に起因するうねりが顕著に観察される。
【０２０７】
＜＜定着温度付近におけるブリスタ発生の評価＞＞
カラー画像を形成している際の定着温度付近（１１０℃、１２０℃、１３０℃）におけるブリスタ発生の有無を以下の評価基準により評価した。結果を表１に示す。
・○：気泡がまったく見られない。
・△：１０倍以上拡大すると気泡が確認できる。
・×：気泡が目視される。
【０２０８】
（比較例１）
−基体の調製−
実施例１における「基体の調製」と同様にして基体を調製した。
−画像形成用材料（支持体２）の作製−
裏面にルチル型二酸化チタンを３．０ｇ／ｃｍ^２含む高密度ポリエチレン（ＭＩ＝１０ｇ／１０分、密度０．９５０ｇ／ｃｍ^３）を押し出しコーティング法（３１０℃）により押し出し、厚み０．３０ｍｍの裏面ポリエチレン層を形成した。次いで、前記基体の表面に、高密度ポリエチレン（ＭＩ＝８ｇ／１０分、密度０．９５０ｇ／ｃｍ^３）と低密度ポリエチレン（ＭＩ＝７ｇ／１０分、密度０．９２３ｇ／ｃｍ^３）との１／１（質量比）のブレンド物（アナターゼ型二酸化チタンを３．０ｇ／ｍ^２含むもの）を押し出しコーティング法により同様に押し出し、厚み０．０３０ｍｍの表面ポリエチレン層を形成して画像形成用材料（支持体２）（２０度光沢度＝８度、コブサイズ吸水度（３００秒）＝０．５ｇ／ｍ^２）を作製した。
実施例１と同様にして評価を行った。結果を表１に示す。
【０２０９】
（実施例２）
実施例１の「熱可塑性樹脂ラテックス含有液の調製」において、熱可塑性ラテックスを、試作品Ａ（アクリル樹脂、ソープフリー、固形分３５％、Ｔｇ＝５５℃、ＭＦＴ＝３０℃）に変えたほかは、実施例１と同様にして画像形成用材料（支持体３）（２０度光沢度＝６０度、コブサイズ吸水度（３００秒）＝０．９ｇ／ｍ^２）を作製した。なお、熱可塑性樹脂ラテックス含有液の最低造膜温度は２０℃であり、剥離の際の塗布膜における溶融粘度（貯蔵弾性率（Ｇ’））（４５℃）は１ＭＰａ以上（２．４ＭＰａ）であった。
別途、塗布膜及びベルト部材の表面を接触させる際の塗布膜における表面温度を測定したところ、最大１１０℃まで加熱されていることが解った。この加熱最大温度における塗布膜の溶融粘度（保存弾性率（Ｇ’））は、０．０８ＭＰａであった。
また実施例１と同様にして電子写真受像シートを作製し、カラー画像を形成し、評価を行った。結果を表１に示す。
【０２１０】
（実施例３）
実施例１の「熱可塑性樹脂ラテックス含有液の調製」において、熱可塑性ラテックスを、試作品Ｂ（アクリル樹脂、ソープフリー、固形分３５％、Ｔｇ＝４７℃、ＭＦＴ＝２５℃）に変えたほかは、実施例１と同様にして画像形成用材料（支持体４）（２０度光沢度＝１７度、コブサイズ吸水度（３００秒）＝１．４ｇ／ｍ^２）を作製した。なお、熱可塑性樹脂ラテックス含有液の最低造膜温度は１５℃であり、剥離の際の塗布膜における溶融粘度（貯蔵弾性率（Ｇ’））（４５℃）は０．７ＭＰａであった。
別途、塗布膜及びベルト部材の表面を接触させる際の塗布膜における表面温度を測定したところ、最大１１０℃まで加熱されていることが解った。この加熱最大温度における塗布膜の溶融粘度（保存弾性率（Ｇ’））は、０．０１ＭＰａであった。
また実施例１と同様にして電子写真受像シートを作製し、カラー画像を形成し、評価を行った。結果を表１に示す。
【０２１１】
（比較例２）
実施例１の「熱可塑性樹脂ラテックス含有液の調製」において、熱可塑性樹脂ラテックスを、熱可塑性樹脂ラテックス（ポリエステル樹脂ラテックス、Ｔｇ＝４８℃、数平均分子量７０００）に変えたほかは、実施例１と同様にして画像形成用材料（支持体６）（２０度光沢度＝７２度、コブサイズ吸水度（３００秒）＝１１．８ｇ／ｍ^２）を作製した。なお、熱可塑性樹脂ラテックス含有液の最低造膜温度は１１５℃であり、剥離の際の塗布膜における溶融粘度（貯蔵弾性率（Ｇ’））（４５℃）は１ＭＰａ以上（４．１ＭＰａ）であった。
別途、塗布膜及びベルト部材の表面を接触させる際の塗布膜における表面温度を測定したところ、最大１１０℃まで加熱されていることが解った。この加熱最大温度における塗布膜の溶融粘度（保存弾性率（Ｇ’））は、０．１２ＭＰａであった。
また、実施例１と同様にして電子写真受像シートを作製し、カラー画像を形成し、評価を行った。結果を表１に示す。
【０２１２】
【表１】

【０２１３】
【発明の効果】
本発明によると、前記従来における諸問題を解決し、特に、耐水性、表面平滑性に優れ、良好な光沢を有する画像形成用材料を効率的に製造可能な画像形成用材料の製造方法、及び、該画像形成用材料の製造方法により製造され、耐水性、表面平滑性に優れ、良好な光沢を有し、各種分野におけるシート材、支持体等として好適に使用可能な画像形成用材料を提供することができる。
【図面の簡単な説明】
【図１】図１は、本発明の定着ベルト方式の電子写真装置の一例を示す概略図である。
【図２】図２は、本発明において、ベルト後処理機（エンドレスプレス）による定着処理を示す概略説明図である。
【図３】図３は、実施例で用いたカラー画像形成装置の定着処理部を示す概略図である。
【符号の説明】
１　　　　　処理部
１’　　　　定着部
２　　　　　ベルト
２’　　　　定着ベルト
３　　　　　加熱ローラ
３’　　　　加熱ローラ
４　　　　　加圧ローラ
４’　　　　加圧ローラ
５　　　　　テンションローラ
５’　　　　テンションローラ
６　　　　　クリーニングローラ
６’　　　　クリーニングローラ
７　　　　　冷却装置
８　　　　　搬送ローラ
８’　　　　搬送ローラ
１０　　　　電子写真受像シート
１０’　　　電子写真受像シート
１０ａ　　　受像層
１０ａ’　　受像層
１２　　　　トナー
１３　　　　定着ベルト
１４　　　　加熱ローラ
１５　　　　加圧ローラ
１６　　　　冷却装置
１７　　　　テンションローラ[0001]
BACKGROUND OF THE INVENTION
The present invention is produced by a method for producing an image forming material that can efficiently produce an image forming material having excellent water resistance and surface smoothness and good gloss, and a method for producing the image forming material. The present invention relates to an image forming material.
[0002]
[Prior art]
Conventionally, image formation by electrophotography has been widely performed. Although plain paper has been used for image formation by the electrophotographic method, recently, with the spread and development of the formation technology of multicolor images and full color images by the electrophotographic method, high-quality multicolor to full color The development of electrophotographic image-receiving sheets capable of forming such images has been actively conducted.
[0003]
In general, this electrophotographic image-receiving sheet has the same image, texture (high gloss, uniformity, thickness, waist, feeling of touch, etc.), handling properties (light resistance, dark storage stability, water resistance, Adhesion resistance, scratch resistance, curl resistance, tearability at the time of disposal, etc.), and more excellent properties than silver halide photographic prints, such as double-sided output, backside writing, etc. It is required to be usable as paper, and various proposals have been made.
[0004]
For example, a technique has been proposed in which a water-repellent coating agent is applied to the surface of printed paper and endless pressing is performed under predetermined conditions to impart water resistance and gloss (see Patent Document 1). However, the gloss of the printed material as in Patent Document 1 has a small amount of latex and the gloss of the latex gives a glossy gloss, but the smooth feeling required for high-quality image material applications can be obtained. It is not a thing. Further, in Patent Document 1, it is not assumed that a function is applied by applying a liquid on an image forming material in a subsequent process, and water resistance cannot be obtained unless a special water repellent is used. There are drawbacks.
[0005]
Also, fixing electrophotography by the same method as endless press processing (cooling and peeling belt fixing; heating and pressurizing between belt and roller, cooling the glossy surface in contact with the belt and then peeling) Techniques have been proposed for obtaining a glossy surface by performing (see Patent Documents 2 to 5). However, even in these proposals, it is not assumed that a function is applied by applying a liquid on the image forming material in a subsequent process, and there is a possibility that an adverse effect on smoothness due to the penetration of the coating liquid may occur. There is a problem that the smoothness required for high-quality image material applications cannot be obtained.
[0006]
[Patent Document 1]
JP 2001-49595 A
[Patent Document 2]
JP 2001-75409 A
[Patent Document 3]
JP-A-4-344680
[Patent Document 4]
Japanese Patent Laid-Open No. 4-199171
[Patent Document 5]
JP 2000-56602 A
[0007]
[Problems to be solved by the invention]
An object of the present invention is to solve the conventional problems and achieve the following objects. That is, the present invention provides a method for producing an image forming material capable of efficiently producing an image forming material having excellent water resistance and surface smoothness and good gloss, and a method for producing the image forming material. An object of the present invention is to provide an image forming material that is manufactured, has excellent water resistance and surface smoothness, has good gloss, and can be suitably used as a sheet material, a support and the like in various fields.
[0008]
[Means for Solving the Problems]
Means for solving the problems are as follows. That is,
<1> A thermoplastic resin latex-containing liquid containing at least a thermoplastic resin latex is applied onto a substrate to form a coating film, and the coating film is brought into contact with the surface of the belt member, and then peeled from the belt member. The surface temperature of the belt member when the coating film and the surface of the belt member are brought into contact with each other is not less than the minimum film-forming temperature in the thermoplastic resin latex-containing liquid. In addition, the present invention provides a method for producing an image forming material, wherein the melt viscosity (storage modulus (G ′)) of the coating film upon peeling is 0.1 MPa or more.
<2> The method for producing an image forming material according to <1>, wherein the belt member is a belt in a cooling and peeling type belt processing machine.
<3> The method for producing an image forming material according to <1> or <2>, wherein the surface roughness (Oken smoothness) of the substrate is 210 seconds or more.
<4> The method for producing an image forming material according to any one of <1> to <3>, wherein a melting temperature in the coating film is 120 ° C. or higher.
<5> The thermoplastic resin latex-containing liquid according to any one of <1> to <4>, including a compound that causes at least one of decomposition, evaporation, and sublimation at a temperature of 120 ° C. or higher. This is a method for producing an image forming material.
<6> The method for producing an image forming material according to any one of <1> to <5>, wherein pressure is applied when the coating film and the surface of the belt member are brought into contact with each other.
<7> The method for producing an image forming material according to any one of <1> to <6>, wherein the surface temperature of the belt member when the coating film is brought into contact with the surface of the belt member is 80 to 200 ° C. is there.
<8> The method for producing an image forming material according to any one of <1> to <7>, wherein the temperature of the coating film at the time of peeling is 0 to 100 ° C.
<9> The method for producing an image forming material according to any one of <1> to <8>, wherein the belt member has a surface roughness (arithmetic average roughness (Ra)) of 20 μm or less.
<10> The method for producing an image forming material according to any one of <1> to <9>, wherein the belt member is an endless belt.
<11> The method for producing an image forming material according to any one of <1> to <10>, wherein a layer made of a fluorocarbon siloxane rubber having a uniform thickness is provided on a surface of the belt member.
<12> The above <1> to <10>, wherein the belt member has a silicone rubber layer having a uniform thickness on the surface, and a fluorocarbon siloxane rubber layer is provided on the surface of the silicone rubber layer. A method for producing an image forming material according to any one of the above.
<13> The method for producing an image forming material according to <11> or <12>, wherein the fluorocarbon siloxane rubber has a perfluoroalkyl ether group and / or a perfluoroalkyl group in a main chain.
<14> The method for producing an image forming material according to any one of <1> to <13>, wherein a value of a contact angle of water representing wettability on the surface of the belt member is 50 ° or more.
<15> The method for producing an image forming material according to any one of <1> to <14>, wherein the substrate is paper.
<16> An image forming material produced by the method for producing an image forming material according to any one of <1> to <15>.
<17> The image forming material according to <16>, wherein the surface glossiness is 45 or more at 20 ° glossiness.
<18> Cobb size water absorption of 20 g / m ² The image forming material according to <16> or <17>, which is the following.
<19> The image forming material according to any one of <16> to <18>, which is used as a support.
<20> The image forming material according to any one of <16> to <19>, further including an image forming layer.
<21> The image forming material according to any one of <16> to <20>, which is used in at least one of an electrophotographic material, a heat-sensitive material, an inkjet image receiving material, a silver salt photographic material, electronic paper, and printing paper. Material.
[0009]
In the method for producing an image forming material according to the present invention, a predetermined thermoplastic resin latex-containing liquid is applied onto a substrate to form a coating film, the coating film is brought into contact with the surface of a belt member, and then the belt. Peel from the member. The surface temperature of the belt member at the time of contacting is equal to or higher than the minimum film forming temperature in the thermoplastic resin latex-containing liquid, and the melt viscosity (storage elastic modulus (G ′)) of the coating film at the time of peeling is It is 0.1 MPa or more. As a result, an image forming material excellent in water resistance and surface smoothness, having good gloss, and suitable as a sheet material, a support or the like in various fields can be obtained.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
<Method for producing image forming material>
In the method for producing an image forming material of the present invention, a predetermined thermoplastic resin latex-containing liquid is applied on a substrate to form a coating film, and after the coating film is brought into contact with the surface of the belt member, Peeling from the belt member.
Further, in the method for producing an image forming material of the present invention, the surface temperature of the belt member at the time of contacting is equal to or higher than the minimum film forming temperature in the thermoplastic resin latex-containing liquid, and at the time of peeling. The melt viscosity (storage elastic modulus (G ′)) of the coating film is 0.1 MPa or more.
[0011]
-Substrate-
The substrate is not particularly limited as long as it can withstand the fixing temperature and can satisfy the requirements in terms of smoothness, whiteness, slipperiness, friction, antistatic properties, dents after fixing, and the like. Depending on the purpose, it can be appropriately selected. In general, Photographic Society of Japan “Basics of Photographic Engineering—Silver Salt Photography”, published by Corona Inc. (Showa 54) (223) to (240) ) And a photographic support such as a synthetic polymer (film).
[0012]
Specific examples of the substrate include synthetic paper (polyolefin-based, polystyrene-based synthetic paper), high-quality paper, art paper, (double-sided) coated paper, (double-sided) cast-coated paper, synthetic resin pulp such as polyethylene, and natural pulp. Paper made of paper, such as mixed paper, Yankee paper, baryta paper, wallpaper, backing paper, synthetic resin or emulsion impregnated paper, synthetic rubber latex impregnated paper, synthetic resin internal paper, paperboard, cellulose fiber paper, polyolefin , Various plastic films or sheets such as polyvinyl chloride, polyethylene terephthalate, polystyrene methacrylate, polyethylene naphthalate, polycarbonate polyvinyl chloride, polystyrene, polypropylene, polyimide, celluloses (for example, triacetyl cellulose), etc. Treatment to impart color reflective film or sheet was subjected to (e.g., processing such as to contain a pigment such as titanium oxide into the film), cloth, metal, glasses, and the like.
These may be used individually by 1 type and may use 2 or more types together as a laminated body.
[0013]
Examples of the substrate further include JP-A-62-253159, pages (29) to (31), JP-A-1-61236, pages (14) to (17), JP-A-63-331648, Examples include the substrates described in Kaihei 2-22651, 3-56955, US Pat. No. 5,001,033, and the like.
[0014]
The substrate preferably has high surface smoothness. Specifically, the surface roughness (Oken smoothness) is preferably 210 seconds or more, and more preferably 250 seconds or more.
If the surface roughness (Oken smoothness) is less than 210 seconds, the image quality of the image may be poor when an image is formed.
In the present invention, the Oken smoothness is measured according to JAPAN TAPPI No. The smoothness defined by the 5B method is preferably about 600, more preferably about 500 seconds.
[0015]
The thickness of the substrate is usually 25 to 300 μm, preferably 50 to 260 μm, and more preferably 75 to 220 μm.
The stiffness of the substrate is not particularly limited and may be appropriately selected depending on the intended purpose. However, a substrate close to a color silver salt photograph substrate is preferable for a photographic image receiving paper.
The density of the substrate is 0.7 g / cm from the viewpoint of fixing performance. ³ The above is preferable.
[0016]
The thermal conductivity of the substrate is not particularly limited and can be appropriately selected depending on the purpose. In particular, when the image forming material of the present invention is used as a support in an electrophotographic material, the fixing performance. In view of the above, it is preferably 0.50 kcal / m · h · ° C. or higher under the conditions of 20 ° C. and a relative humidity of 65%.
In the present invention, the thermal conductivity can be measured by a method described in JP-A-53-66279 using a transfer paper conditioned according to JIS P8111.
[0017]
Various additives appropriately selected according to the purpose can be added to the substrate within a range that does not impair the effects of the present invention.
Examples of the additive include whitening agents, conductive agents, fillers, pigments such as titanium oxide, ultramarine blue, and carbon black, and dyes.
[0018]
In addition, one surface or both surfaces of the substrate may be subjected to various surface treatments and undercoating treatments for the purpose of improving adhesion with a layer provided thereon.
Examples of the surface treatment include a glossy surface, or a fine surface, a mat surface, or a silk surface described in JP-A-55-26507, a corona discharge treatment, a flame treatment, a glow discharge treatment, a plasma treatment, and the like. And the like.
Examples of the undercoating treatment include the method described in JP-A No. 61-84443.
These treatments may be performed singly, or may be performed after performing the above-mentioned mold forming treatment or the like, or may be performed after the surface treatment such as the above-described activation treatment. It can be combined arbitrarily.
[0019]
In the substrate, a hydrophilic binder, a semiconductive metal oxide such as alumina sol or tin oxide, and carbon black or other antistatic agent may be applied on the surface or the back surface of the substrate, or a combination thereof. . Specific examples of such a substrate include a support described in JP-A No. 63-220246.
[0020]
-Liquid containing thermoplastic resin latex-
The thermoplastic resin latex-containing liquid contains at least a thermoplastic resin latex and, if necessary, other components.
[0021]
-Thermoplastic resin latex-
The thermoplastic resin latex is not particularly limited as long as it can be deformed under heating and pressure conditions, and can be appropriately selected according to the purpose. Examples thereof include latex of thermoplastic resins such as polyethylene, polypropylene, nylon, polyurethane, polyvinyl alcohol, polyether, polyacrylonitrile, and ethylene vinyl alcohol copolymer (EVOH). These may be used alone or in combination of two or more.
In the method for producing an image forming material of the present invention, since the selectivity of the thermoplastic resin latex that can be used in this way is large, it is easy to obtain raw materials and easily use a material having high heat resistance. This is preferable.
[0022]
-Other ingredients-
The other components that can be contained in the thermoplastic resin latex-containing liquid are not particularly limited and may be appropriately selected depending on the use of the image forming material. In addition to the water-soluble resin described later, for example, a pigment Various additives such as a plasticizer, a filler, a crosslinking agent, a charge adjusting agent, a conductive agent, a surfactant, a dye, a humidity control agent, and a matting agent are all preferably mentioned. These may be used alone or in combination of two or more. Among these components, a compound that causes at least one of decomposition, evaporation, and sublimation at a temperature of 120 ° C. or higher is particularly preferable.
[0023]
<Preparation of liquid containing thermoplastic resin latex>
Although there is no restriction | limiting in particular as the preparation method of the said thermoplastic resin latex containing liquid, For example, the method etc. which add the said thermoplastic resin latex, the said other component, etc. in water, and disperse | distribute them by stirring are mentioned.
[0024]
-Formation of coating and coating film-
The method for applying the thermoplastic resin latex-containing liquid is not particularly limited and may be appropriately selected depending on the intended purpose. For example, a bar coating method, a wire coating method, a curtain coating method, a spin coating method, an extrusion method. Known coating methods such as a coating method, a kneader coating method, a blade coating method, an air knife coating method, a gravure coating method, and a dip coating method can be used.
In the coating film formed by the coating, the melting temperature is preferably 120 ° C. or higher, and more preferably 150 ° C. or higher.
If the melting temperature is less than 120 ° C., it may be unfavorable because it melts when used as various base materials that require heat resistance.
[0025]
−Contact / Peeling−
In the present invention, the thermoplastic resin latex-containing liquid is applied onto the substrate to form a coating film, the coating film is brought into contact with the surface of the belt member, and then peeled from the belt member. In the present invention, by using the belt member in this manner, an image forming material that is efficiently formed into a film, excellent in water resistance and surface smoothness, and having good gloss is efficiently provided.
[0026]
As the surface temperature of the belt member when the coating film is brought into contact with the belt member, the thermoplastic resin latex-containing liquid is used in that an image-forming material excellent in water resistance and surface smoothness is efficiently produced. It is necessary that the temperature is equal to or higher than the minimum film-forming temperature, and is preferably 20 ° C. or higher, more preferably 40 ° C. or higher than the minimum film-forming temperature. Moreover, as temperature at the time of making this contact, 50-250 degreeC is specifically preferable, and 80-180 degreeC is more preferable.
[0027]
In the present invention, the minimum film-forming temperature can be measured, for example, as follows.
<< Measurement Method of Minimum Film Formation Temperature >>
Like a temperature gradient tester (STL type, manufactured by Shimakawa Seisakusho Co., Ltd.), a sample was continuously coated on a surface with different temperatures at a desired coating amount and allowed to stand, and a film was formed visually. The minimum filming temperature is measured by reading the temperature corresponding to the area.
[0028]
It is preferable to apply pressure when the coating film is brought into contact with the belt member. The pressurizing method is not particularly limited, but it is preferable to apply a nip pressure. The nip pressure is 1 to 100 kg / cm in that an image forming material having excellent water resistance and surface smoothness and good gloss can be efficiently produced. ² Is preferred, 5-30 kg / cm ² Is more preferable.
[0029]
The surface of the belt member is preferably subjected to a surface treatment with a silicone-based, fluorine-based, or shared surface treatment agent in terms of excellent peelability of the coating film.
[0030]
The surface roughness (arithmetic average roughness (Ra)) of the belt member is 20 μm or less, particularly in that an image forming material having excellent surface smoothness and good gloss can be efficiently produced. Is preferably 5 μm or less, more preferably 1 μm or less.
As the wettability on the surface of the belt member, the contact angle of water is preferably 50 ° or more, and more preferably 70 ° or more in that adhesion of the coating film to the belt member can be suppressed.
Here, the value of the contact angle of water can be measured by a static method using, for example, a contact angle meter (CA-A) manufactured by Kyowa Interface Chemical Co., Ltd.
[0031]
Although there is no restriction | limiting in particular as an aspect of the said belt member, It is preferable that it is a belt in a cooling peeling type belt type processor. The cooling and peeling type belt type processor is not particularly limited as long as it is provided with a belt member cooling device. For example, the latter part of fixing is preferable in that the peeling property when peeling the coating film is good. It is preferable to provide a cooling device for the belt member, and to perform a cooling peeling type post-treatment such as adjusting the temperature at the time of peeling low. The cooling temperature in the cooling device is preferably not higher than the softening point or glass transition temperature of the thermoplastic resin latex or the like.
[0032]
The belt member is particularly preferably an endless belt in that an image forming material can be produced continuously and efficiently.
[0033]
In the present invention, the melt viscosity (storage modulus (G ′)) of the coating film at the time of peeling is excellent in water resistance, and an image forming material having good gloss can be efficiently produced. The pressure must be 0.1 MPa or more, and preferably 1 MPa or more.
[0034]
Further, in the present invention, the temperature in the coating film at the time of peeling is preferably 0 to 120 ° C., particularly in that an image forming material having excellent surface smoothness and good gloss is efficiently produced. 30-70 degreeC is more preferable.
[0035]
-Others (drying, calendar processing, etc.)-
In this invention, it is preferable to dry a coating film after the said application | coating and before the said contact and peeling. There is no restriction | limiting in particular as this drying method, For example, well-known hot air drying, vacuum drying, natural drying etc. are mentioned. The temperature during drying varies depending on the component type contained in the coating film, but is generally preferably about 0 to 100 ° C.
[0036]
In the present invention, the coating film is preferably subjected to a calendar treatment after the coating and before the contact / peeling. When performing the said drying in this invention, it is preferable to perform a calendar process after drying.
[0037]
According to the method for producing an image forming material of the present invention described above, an image forming material excellent in water resistance and surface smoothness and having good gloss can be produced efficiently.
[0038]
[Image forming materials]
The image forming material of the present invention is manufactured by the method for manufacturing the image forming material of the present invention. Therefore, it is particularly excellent in water resistance and surface smoothness and has a good gloss.
[0039]
Specifically, the surface smoothness and gloss are preferably 45 or more in terms of 20 degree gloss, more preferably 60 or more, and even more preferably 75 or more.
[0040]
Specifically, the water resistance is 20 g / m in terms of water absorption at the hump size. ² The following is preferred, 5 g / m ² The following is more preferable, 2 g / m ² The following is more preferable.
The bump size water absorption is a value obtained by measuring the amount of water supplied when pure water is brought into contact with the sample for 300 seconds according to JIS P 8140.
[0041]
-Preferred embodiments and uses of image forming materials-
The preferred embodiment / use of the image forming material of the present invention is not particularly limited and is suitably used for various uses requiring water resistance, surface smoothness, gloss, etc. An image forming layer or the like is preferably provided thereon, and specifically, an electrophotographic image receiving material, a heat sensitive material, an ink jet image receiving material, a silver salt photographic material, a rewritable display material (electronic paper), Most preferably, it is used as printing paper or the like.
[0042]
<Image-receiving material for electrophotography (electrophotographic image-receiving sheet)>
The electrophotographic image-receiving material (electrophotographic image-receiving sheet) has at least an image-receiving layer on the image-forming material of the present invention, and other layers as necessary.
[0043]
<< Image-receiving layer >>
In the electrophotographic image receiving sheet, the image receiving layer is a layer that receives at least one of color toner and black toner and forms an image.
[0044]
The thickness of the image receiving layer is not particularly limited and may be appropriately selected depending on the intended purpose. For example, it is preferably 1/2 or more of the toner particle diameter, and 1 to 3 times the toner particle diameter. Further, the thickness disclosed in JP-A-5-216322, 7-301939, and the like are preferable, and specifically, 5 to 30 μm is preferable, and 8 to 20 μm is more preferable.
When the thickness of the image receiving layer is less than 5 μm, toner embedding is insufficient and gloss may be insufficient, and when it exceeds 30 μm, blocking may be deteriorated.
[0045]
As the physical properties of the image receiving layer, those satisfying one or more of the following items are preferable, those satisfying two or more items are more preferable, and those satisfying all the items are particularly preferable.
The physical properties are as follows: (1) Tg (glass transition temperature) of the image receiving layer is 30 ° C. or more and Tg + 20 ° C. or less of the toner; (2) T1 / 2 of image receiving layer (1/2 method softening point) Is in the range of 60 to 200 ° C., preferably 80 to 170 ° C., (3) Tfb (outflow start temperature) of the image receiving layer is 40 to 200 ° C., more preferably Tfb of the image receiving layer is Tfb + 50 ° C. (4) The viscosity of the image receiving layer is 1 × 10 ⁵ The temperature at which the CP becomes 40 ° C. or higher and lower than that of the toner. (5) The storage elastic modulus (G ′) at the fixing temperature of the image receiving layer is 1 × 10. ² Pa ~ 1 × 10 ⁵ Pa and loss elastic modulus (G ″) is 1 × 10 ² Pa ~ 1 × 10 ⁵ (6) Loss tangent (G ″ / G ′), which is the ratio of loss elastic modulus (G ″) and storage elastic modulus (G ′) at the fixing temperature of the image receiving layer, is 0.01 to 10. (7) The storage elastic modulus (G ′) at the fixing temperature of the image receiving layer is −50 to +2500 with respect to the storage elastic modulus (G ″) at the fixing temperature of the toner, and (8) the image receiving layer of the molten toner. The upper inclination angle is 50 degrees or less, preferably 40 degrees or less.
[0046]
The image receiving layer preferably satisfies the physical properties disclosed in Japanese Patent No. 2788358, JP-A-7-248637, JP-A-8-305067, JP-A-10-239889, and the like.
[0047]
The physical property (1) can be measured by a differential scanning calorimeter (DSC). The physical properties (2) to (3) can be measured using, for example, a flow tester CFT-500 manufactured by Shimadzu Corporation. The physical properties (5) to (7) can be measured using a rotational rheometer (for example, Dynamic Analyzer RADII manufactured by Rheometric Co.). The physical property (8) can be measured well by the method disclosed in JP-A-8-334916 using a contact angle measuring device manufactured by Kyowa Interface Chemical Co., Ltd.
[0048]
The material of the image receiving layer is not particularly limited and may be appropriately selected depending on the intended purpose. For example, in the transfer process, an image is formed from a developing drum or an intermediate transfer member by (static) electricity, pressure, or the like. Examples include receptive substances that can accept toner and can be fixed by heat, pressure, or the like in the fixing step. Examples of the receptive substance include thermoplastic resins and water-soluble resins.
[0049]
These may be used individually by 1 type and may use 2 or more types together. Among these, a thermoplastic resin is preferable, and among these thermoplastic resins, a resin similar to the binder resin contained in the toner particles used for image formation is particularly preferable in terms of toner fixing property.
[0050]
--- Thermoplastic resin-
The thermoplastic resin is not particularly limited as long as it can be deformed under temperature conditions such as fixing and can accept the toner, and can be appropriately selected according to the purpose. And the same type of resins are preferred. In many of the toners, polyester resins and copolymer resins such as styrene and styrene-butyl acrylate are used. In this case, the thermoplastic resins used in the electrophotographic image-receiving sheet are also polyester resins, styrene, styrene- It is preferable to use a copolymer resin (styrene-acrylic resin) such as butyl acrylate, more preferably 20% by mass or more of a copolymer resin such as polyester resin, styrene, or styrene-butyl acrylate, and styrene or styrene. -A butyl acrylate copolymer, a styrene-acrylic acid ester copolymer, a styrene-methacrylic acid ester copolymer and the like are also preferable.
[0051]
Specific examples of the thermoplastic resin include, for example, (a) a resin having an ester bond, (b) a polyurethane resin, (c) a polyamide resin, (d) a polysulfone resin, (e) a polyvinyl chloride resin, and the like. (F) Polyvinyl butyral, (g) Polycaprolactone resin, (h) Polyolefin resin, and the like.
[0052]
Examples of the resin having (i) an ester bond include terephthalic acid, isophthalic acid, maleic acid, fumaric acid, phthalic acid, adipic acid, sebacic acid, azelaic acid, abietic acid, succinic acid, trimellitic acid, and pyromellitic acid. Dicarboxylic acid components such as acids (these dicarboxylic acid components may be substituted with sulfonic acid groups, carboxyl groups, etc.) and diether derivatives of ethylene glycol, diethylene glycol, propylene glycol, bisphenol A, bisphenol A (for example, Bisphenol A ethylene oxide 2 adduct, bisphenol A propylene oxide 2 adduct, etc.), bisphenol S, 2-ethylcyclohexyldimethanol, neopentylglycol, cyclohexyldimethanol, glycerin, etc. Polyester resins obtained by condensation with components (hydroxyl groups may be substituted on these alcohol components), polyacrylic ester resins such as polymethyl methacrylate, polybutyl methacrylate, polymethyl acrylate, polybutyl acrylate, etc. Examples thereof include polymethacrylate resin, polycarbonate resin, polyvinyl acetate resin, styrene acrylate resin, styrene-methacrylate copolymer resin, vinyl toluene acrylate resin, and the like. Specifically, JP-A-59-101395 63-7971, 63-7972, 63-7973, and 60-294862, and the like.
[0053]
Commercially available products of the polyester resin include Toyobo's Byron 290, Byron 200, Byron 280, Byron 300, Byron 103, Byron GK-140, Byron GK-130; Kao's Tufton NE-382, Tufton U-5, ATR-2009, ATR-2010; Elitel UE3500, UE3210, XA-8153 manufactured by Unitika; Polyester TP-220, R-188 manufactured by Nippon Gohsei
Commercially available products of the acrylic resin include Mitsubishi Rayon Co., Ltd. Dianal SE-5437, SE-5102, SE-5377, SE-5649, SE-5466, SE-5482, HR-169, 124, HR-1127. , HR-116, HR-113, HR-148, HR-131, HR-470, HR-634, HR-606, HR-607, LR-1065, 574, 143, 396, 637, 162, 469, 216 , BR-50, BR-52, BR-60, BR-64, BR-73, BR-75, BR-77, BR-79, BR-80, BR-83, BR-85, BR-87, BR -88, BR-90, BR-93, BR-95, BR-100, BR-101, BR-102, BR-105, BR-106, BR-107, BR- 08, BR-112, BR-113, BR-115, BR-116, BR-117; Sreck P SE-0020, SE-0040, SE-0070, SE-0100, SE-1010, SE- manufactured by Sekisui Chemical Co., Ltd. 1035; Sanyo Chemical Industries Himer ST95, ST120; FM601 manufactured by Mitsui Chemicals.
[0054]
Examples of the (v) polyvinyl chloride resin further include polyvinylidene chloride resin, vinyl chloride-vinyl acetate copolymer resin, vinyl chloride-vinyl propionate copolymer resin, and the like.
Examples of (f) polyvinyl butyral include cellulose resins such as polyol resin, ethyl cellulose resin, and cellulose acetate resin. Examples of commercially available products include those manufactured by Denki Kagaku Kogyo Co., Ltd. and Sekisui Chemical Co., Ltd. The polyvinyl butyral has a polyvinyl butyral content of 70% by mass or more, an average polymerization degree of 500 or more is preferable, an average polymerization degree of 1000 or more is more preferable, and a commercial product is Denka Butyral manufactured by Denki Kagaku Kogyo Co., Ltd. 3000-1, 4000-2, 5000A, 6000C; manufactured by Sekisui Chemical Co., Ltd. S-REC BL-1, BL-2, BL-3, BL-S, BX-L, BM-1, BM-2, BM-5 , BM-S, BH-3, BX-1, BX-7, and the like.
Examples of the (g) polycaprolactone resin include styrene-maleic anhydride resin, polyacrylonitrile resin, polyether resin, epoxy resin, phenol resin, and the like.
Examples of the (h) polyolefin resin include polyethylene resins, polypropylene resins, copolymer resins of olefins such as ethylene and propylene and other vinyl monomers, acrylic resins, and the like.
[0055]
The said thermoplastic resin may be used individually by 1 type, may be 2 or more types, In addition to these, these mixtures, these copolymers, etc. can also be used.
[0056]
The thermoplastic resin is preferably one that can satisfy the above-mentioned image receiving layer physical properties in the state where the image receiving layer is formed, more preferably one that can satisfy the above-mentioned image receiving layer physical properties even with a resin alone, and has different image receiving layer physical properties. It is also preferable to use two or more resins in combination.
[0057]
As the thermoplastic resin, those having a larger molecular weight than the thermoplastic resin used in the toner are preferable. However, the molecular weight described above is not necessarily preferable depending on the relationship between the thermodynamic characteristics of the thermoplastic resin used in the toner and the resin used in the image receiving layer. For example, when the softening temperature of the resin used in the image receiving layer is higher than the thermoplastic resin used in the toner, the molecular weight is the same or the resin used in the image receiving layer is smaller. May be preferred.
[0058]
It is also preferable to use a mixture of resins having the same composition and different average molecular weights as the thermoplastic resin. Further, as the relationship with the molecular weight of the thermoplastic resin used in the toner, the relationship disclosed in JP-A-8-334915 is preferable.
The molecular weight distribution of the thermoplastic resin is preferably wider than the molecular weight distribution of the thermoplastic resin used in the toner.
Examples of the thermoplastic resin include Japanese Patent Publication No. 5-127413, No. 8-194394, No. 8-334915, No. 8-334916, No. 9-171265, No. 10-221877, and the like. Those satisfying the physical properties disclosed in 1) are preferred.
[0059]
-Water-soluble resin-
The water-soluble resin is not particularly limited as long as it is a water-soluble resin, and the composition, bond structure, molecular structure, molecular weight, molecular weight distribution, form and the like can be appropriately selected depending on the purpose. And those having a water-solubilizing group.
Examples of the water-solubilizing group of the polymer include a sulfonic acid group, a hydroxyl group, a carboxylic acid group, an amino group, an amide group, and an ether group.
[0060]
Examples of the water-soluble resin include Research Disclosure No. 17,643, page 26, 18,716, page 651, 307,105, pages 873-874, and JP-A-64-13546. 71) to (75), and specifically, for example, vinylpyrrolidone-vinyl acetate copolymer, styrene-vinylpyrrolidone copolymer, styrene-maleic anhydride copolymer, Water-soluble polyester, water-soluble polyurethane, water-soluble nylon, water-soluble epoxy resin, and the like can be mentioned.
[0061]
As the water-soluble resin, when the binder resin of the toner is a polyester resin or the like, a water-dispersed polyester or the like can be suitably used as the resin for the image receiving layer.
[0062]
Other examples of the water-soluble resin include water-dispersed resins such as water-dispersed acrylic resins, water-dispersed polyester resins, water-dispersed polystyrene resins, and water-dispersed urethane resins; acrylic resin emulsions, polyvinyl acetate emulsions, SBR (styrene- Examples thereof include emulsions such as butadiene and rubber emulsions, resins and emulsions in which the thermoplastic resin is dispersed in water, or copolymers, mixtures, and cation-modified products thereof.
These may be used alone or in combination of two or more.
[0063]
Commercially available products of the water-dispersed resin include, for example, Toyobo's Vylonal MD-1200, MD-1220, MD-1930; Kyoyo Chemical Plus Coat Z-446, Z-465, RZ-96; ES-611, ES-670; Takamatsu Oil & Fats Pes Resin A-160P, A-210, A-620; Hoshiros XE-18, XE-35, XE-48, XE-60, XE-62; Pure drug Jurimer AT-210, AT-510, AT-515, AT-613, ET-410, ET-530, ET-533, FC-60, FC-80, etc. may be mentioned.
[0064]
As the water-soluble resin, gelatin is preferably mentioned, and the gelatin is selected from so-called demineralized gelatin in which the content of lime-processed gelatin, acid-processed gelatin, calcium, etc. is reduced according to various purposes. Well, you may use these together.
[0065]
The film-forming temperature of the water-soluble resin is preferably room temperature or higher for storage before printing, and preferably 100 ° C. or lower for fixing toner particles.
[0066]
-Other additives-
The image receiving layer may contain other additives appropriately selected for the purpose of improving the thermodynamic characteristics.
The additive is not particularly limited and may be appropriately selected depending on the intended purpose. For example, pigments, plasticizers, fillers, crosslinking agents, charge control agents, conductive agents, surfactants, dyes, humidity control Agents, matting agents, and the like.
[0067]
The pigment can be preferably contained for the purpose of imparting whiteness, adjusting thermodynamic characteristics of the image receiving paper, or imparting receptivity to the image receiving paper such as ink for inkjet printing.
[0068]
Examples of the pigment include fluorescent brighteners, white pigments, and colored pigments.
[0069]
The fluorescent whitening agent is a compound that has absorption in the near ultraviolet region and emits fluorescence at 400 to 500 nm.
Examples of the optical brightener include K.I. The compounds described in “The Chemistry of Synthetic Dies” edited by Veen Rataraman, Vol. 8, Chapter 8, include stilbene compounds, coumarin compounds, biphenyl compounds, benzoxazoline compounds, naphthalimide compounds. , Pyrazoline compounds, carbostyryl compounds, and the like. Examples of these include white fur fur PSN, PHR, HCS, PCS, B manufactured by Sumitomo Chemical, and UVITEX-OB manufactured by Ciba-Geigy.
[0070]
Examples of the colored pigment include various pigments and azo pigments described in JP-A-63-44653 (azo lake: Carmine 6B, Red 2B, insoluble azo; monoazo yellow, disazo yellow, pyrazolo orange, vulcan orange, condensed azo Type: chromophthalyl, chromophthaled red), polycyclic pigment (phthalocyanine type: copper phthalocyanine blue, copper phthalocyanine green, dioxazine type; dioxazine violet, isoindolinone type; isoindolinone yellow, slen type; perylene, perinone , Flavantron, thioindigo, lake pigment (malachite green, rhodamine B, rhodamine G, Victoria blue B) or inorganic pigment (oxide, titanium dioxide, bengara, sulfate; precipitated barium sulfate, carbonate; precipitated calcium carbonate , Silicates; hydrous silicates, anhydrous silicates, metal powders; aluminum powder, bronze powder, zinc powder, carbon black, chrome yellow, Prussian blue), and the like.
[0071]
Examples of the white pigment include silica pigment, alumina pigment, titanium oxide pigment, zinc oxide pigment, zirconium oxide pigment, mica-like iron oxide, lead white, lead oxide pigment, cobalt oxide pigment, strontium chromate, molybdenum pigment, smectite Inorganic white pigments such as magnesium oxide pigments, calcium oxide pigments, calcium carbonate pigments, and mullite. Among these, silica pigments, alumina pigments, and titanium oxide pigments are preferable, and titanium oxide pigments are particularly preferable. These pigments may be used alone or in combination of two or more.
[0072]
Examples of the silica pigment include spherical silica and amorphous silica.
The silica pigment can be synthesized by a dry method, a wet method, or an airgel method. Further, the surface of the hydrophobic silica particles may be surface-treated with a trimethylsilyl group or silicone. Among these, colloidal silica is particularly preferable.
The average particle diameter of the silica pigment is preferably in a different region, but when whiteness is imparted, it is preferably 4 to 120 nm, and more preferably 4 to 90 nm.
[0073]
The silica pigment is preferably a porous silica pigment for the purpose of imparting acceptability to ink or the like. The average pore size of the porous silica pigment is preferably 50 to 5000 nm. The average pore volume per mass of the porous silica pigment is preferably 0.5 to 3 ml / g.
[0074]
Examples of the alumina pigment include anhydrous alumina and alumina hydrate. As the crystal form of the anhydrous alumina, α, β, γ, δ, ζ, η, θ, κ, ρ, or χ can be used. Alumina hydrate is preferred to the anhydrous alumina. As the alumina hydrate, monohydrate or trihydrate can be used. Such monohydrates include pseudoboehmite, boehmite and diaspore. The trihydrate includes dibsite and bayerite.
[0075]
As an average particle diameter of the said alumina pigment, it is preferable that it is 4-5000 nm, and when giving whiteness, it is more preferable that it is 4-200 nm.
The alumina pigment is preferably porous alumina from the viewpoint of imparting acceptability to ink or the like. The average pore diameter of the porous alumina pigment is more preferably 100 to 5000 nm. The average pore volume per mass of the porous alumina pigment is preferably 0.3 to 3 ml / g.
The alumina hydrate can be synthesized by a sol-gel method in which ammonia is added to an aluminum salt solution for precipitation or a method in which an alkali aluminate is hydrolyzed. The anhydrous alumina can be obtained by dehydrating alumina hydrate by heating.
[0076]
As the white pigment, those which do not absorb in the ultraviolet wavelength region are particularly preferable in that the fluorescence intensity of the support for an image forming material is high, the weather resistance is excellent, and the image storage stability is good.
[0077]
As the plasticizer, known plasticizers for resins can be used. The plasticizer here is a group of compounds that adjusts the flow or softening of the image-receiving layer by heat and / or pressure when fixing the toner.
Specific examples of the plasticizer include “Chemical Handbook” (edited by the Chemical Society of Japan, Maruzen), “Plasticizer—its theory and application” (written by Koichi Murai, Yukishobo), and “on plasticizer research” It can be selected with reference to “Research on Plasticizers” (edited by Polymer Chemistry Association), “Handbook Rubber / Plastic Compounding Chemicals” (edited by Rubber Digest Co., Ltd.), etc., and also disclosed in JP-A-59-83154. 59-178451, 59-178453, 59-178454, 59-178455, 59-178457, 62-174754, 62-245253, 61-209444, 61-200538, 62-8145, 62-9348, 62-30247, 62-136646, 62-174754, 62-245253, 61 No. 209444, No. 61-200538, No. 62-8145, No. 62-9348, No. 62-30247, No. 62-136646, JP-A-2-235694, etc. Esters (eg, phthalates, phosphates, fatty acids, abietic acid esters, adipic acid esters, sebacic acid esters, azelaic acid esters, benzoic acid esters, butyric acid esters, epoxidation Fatty acid esters, glycolic acid esters, propionic acid esters, trimellitic acid esters, citric acid esters, sulfonic acid esters, carboxylic acid esters, succinic acid esters, maleic acid esters, fumaric acid esters, Phthalates, stearates, etc.), Amides (for example, fatty acid amides, sulfoamides, etc.), ethers, alcohols, paraffins, polyolefin waxes (for example, polypropylene waxes, polyethylene waxes, etc.), lactones, polyethyleneoxys, silicone oils, Examples of the compound include fluorine compounds.
[0078]
The plasticizer may have a relatively low molecular weight. In this case, the molecular weight is preferably lower than that of the resin to be plasticized, more preferably the molecular weight is 15000 or less, Those having a molecular weight of 8000 or less are particularly preferred.
As the plasticizer, a polymer plasticizer may be used. In this case, the polymer is preferably the same type of polymer as the resin to be plasticized. For example, polyester is preferable for plasticizing a polyester resin. An oligomer may be used as a plasticizer.
[0079]
As the plasticizer, in addition to those described above, for example, Adeka Sizer PN-170, PN-1430 manufactured by Asahi Denka Kogyo; P. HALL products PARAPLEX-G-25, G-30, G-40; Rika Hercules products Ester gum 8L-JA, Ester R-95, Pentaline 4851, FK115, 4820, 830, Louisol 28-JA, Picolastic A75, Pico Tex LC, Crystallex 3085, and the like.
[0080]
The plasticizer is added to at least one of the constituent layers including the image receiving layer formed on the support, for example, a protective layer, an intermediate layer, an undercoat layer, and the like. It is preferably a layer through which stress generated when embedded in the image receiving layer is transmitted, strain caused by stress (physical strain such as elastic force and viscosity, strain due to material balance such as molecules, binder main chain and pendant part, Etc.) is more preferable, and a layer at a position where these stresses and strains can be relieved, for example, a layer adjacent to the image receiving layer, the image receiving layer, and a surface layer are particularly preferable.
The plasticizer may be in a micro-dispersed state in the added layer, or may be in a micro-phase-separated state in the form of a sea island, and is sufficient with other components such as a binder. It may be in a state of being mixed and dissolved.
[0081]
The amount of the plasticizer added is preferably 0.001% by mass to 200% by mass when the total mass of the resin constituting the layer, other components, and the plasticizer is 100% by mass. The mass% is more preferably 100% by mass, particularly preferably 1% by mass to 50% by mass.
Adjusting the plasticizer for smoothness (improving transportability due to reduced frictional force), improving fixing unit offset (peeling off toner and layers from the fixing unit), adjusting curl balance, adjusting charging (forming toner electrostatic images) ), And the like.
[0082]
As the filler, known reinforcing agents, fillers, and reinforcing materials for resins can be used, and organic and inorganic fillers are preferred.
The filler should be selected with reference to "Handbook Rubber / Plastic Compounding Chemicals" (edited by Rubber Digest Co., Ltd.), "New Edition Plastic Compounding Agent Basics and Applications" (Taiseisha), "Filler Handbook" (Taiseisha), etc. Can do.
As the filler, for example, various inorganic pigments can be used. Examples of the inorganic pigment include titanium oxide, calcium carbonate, silica, talc, mica, alumina, and other “handbook rubber and plastic compounding chemicals” (Rubber Digest Co., Ltd.). Ed.) And the like.
[0083]
Examples of the cross-linking agent include compounds having two or more known reactive groups in the molecule as epoxy groups, isocyanate groups, aldehyde groups, active halogen groups, active methylene groups, acetylene groups, and the like as reactive groups, A compound having two or more groups capable of forming a bond by a bond, an ionic bond, a coordinate bond, or the like is also included. Examples of the crosslinking agent also include known compounds such as coupling agents for resins, curing agents, polymerization agents, polymerization accelerators, coagulants, film-forming agents, film-forming aids, and the like. Examples of the coupling agent include chlorosilanes, vinyl silanes, epoxy silanes, aminosilanes, alkoxyaluminum chelates, titanate coupling agents, etc., “Handbook Rubber / Plastic Compounding Chemicals” (edited by Rubber Digest Co., Ltd.) The well-known thing described in etc. is mentioned.
[0084]
The charge adjusting agent can be used for the purpose of adjusting toner transfer, adhesion, etc., and preventing charging adhesion of the electrophotographic image receiving sheet. As the charge control agent, any of conventionally known antistatic agents and charge control agents can be used, and surfactants such as cationic surfactants, anionic surfactants, amphoteric surfactants, and nonionic surfactants can be used. In addition to the agent, a polymer electrolyte, a conductive metal oxide, and the like can be used.
Examples of the charge control agent include cationic antistatic agents such as quaternary ammonium salts, polyamine derivatives, cation-modified polymethyl methacrylate, and cation-modified polystyrene, anionic antistatic agents such as alkyl phosphates and anionic polymers, and fatty acids. Nonionic antistatic agents such as esters and polyethylene oxide are exemplified, but the invention is not limited thereto.
The charge adjusting agent is preferably a cation or nonionic one when the toner has a negative charge.
[0085]
Examples of the conductive agent include ZnO and TiO. ₂ , SnO ₂ , Al ₂ O ₃ , In ₂ O ₃ , SiO ₂ , MgO, BaO, MoO ₃ And metal oxides. These may be used individually by 1 type and may use 2 or more types together. The metal oxide may further contain a different element, for example, Al, In, etc., TiO, etc. with respect to ZnO. ₂ Nb, Ta, etc., SnO ₂ Can contain (doping) Sb, Nb, a halogen element, or the like.
[0086]
Various known dyes can be used as the dye, and examples thereof include oil-soluble dyes.
Examples of the oil-soluble dye include anthraquinone compounds and azo compounds.
Specific examples of the oil-soluble dye include C.I. I. Vat violet 1, C.I. I. Vat violet 2, C.I. I. Vat violet 9, C.I. I. Vat violet 13, C.I. I. Vat violet 21, C.I. I. Vat Blue 1, C.I. I. Vat Blue 3, C.I. I. Vat Blue 4, C.I. I. Vat Blue 6, C.I. I. Vat Blue 14, C.I. I. Vat Blue 20, C.I. I. Vat dyes such as Vat Blue 35, C.I. I. Dispers Violet 1, C.I. I. Disperse Violet 4, C.I. I. Disperse Violet 10, C.I. I. Disperse Blue 3, C.I. I. Disperse Blue 7, C.I. I. Disperse dyes such as Disperse Blue 58, C.I. I. Solvent Violet 13, C.I. I. Solvent Violet 14, C.I. I. Solvent Violet 21, C.I. I. Solvent Violet 27, C.I. I. Solvent Blue 11, C.I. I. Solvent Blue 12, C.I. I. Solvent Blue 25, C.I. I. Solvent Blue 55 etc. are mentioned. Also preferred are colored couplers used in silver salt photography.
[0087]
There is no restriction | limiting in particular as whiteness of the said image receiving layer (surface layer), Although it can select suitably according to the objective, The higher one is preferable.
As the whiteness, CIE 1976 (L ^* a ^* b ^* ) L in color space ^* The value is preferably 80 or more, more preferably 85 or more, and particularly preferably 90 or more. The white color is preferably as neutral as possible. As the white color, L ^* a ^* b ^* In space (a ^* ) ² + (B ^* ) ² Is preferably 50 or less, more preferably 18 or less, and particularly preferably 5 or less.
[0088]
Further, the whiteness of the image receiving layer is preferably 85% or more as measured by the method defined in JIS P 8123, and the spectral reflectance is 85% or more in the wavelength range of 440 nm to 640 nm and the maximum in the same wavelength range. The difference between the spectral reflectance and the minimum spectral reflectance is preferably within 5%. The spectral reflectance is 85% or more in the wavelength range of 400 nm to 700 nm, and the maximum spectral reflectance and the minimum spectral reflectance in the same wavelength range. More preferably, the difference is within 5%.
[0089]
There is no restriction | limiting in particular as glossiness of the said image receiving layer (surface layer), Although it can select suitably according to the objective, The higher one is preferable.
The glossiness is preferably 45 or more, more preferably 60 or more, still more preferably 75 or more, and particularly preferably 90 or more in the entire region from white without toner to black having the maximum density. However, the upper limit of the glossiness is preferably 110 or less, and if it exceeds 110, it becomes like a metallic luster, which is not preferable for image quality.
The glossiness can be measured based on JIS Z 8741.
[0090]
The smoothness of the image receiving layer (surface layer) is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably higher.
As the smoothness, the arithmetic average roughness (Ra) is preferably 3 μm or less, more preferably 1 μm or less, and more preferably 0.5 μm or less in the entire region from white without toner to black having the maximum density. Is particularly preferred.
The arithmetic average roughness can be measured based on JIS B 0601, B 0651, and B 0652.
[0091]
The surface electrical resistance in the image receiving layer (surface layer) is 1 × 10 ⁶ ~ 1x10 ¹⁵ (Conditions at 25 ° C. and 65% RH) Ω / cm ² The surface electrical resistance in other layers other than the image receiving layer is also 1 × 10 ⁶ ~ 1x10 ¹⁵ (Conditions at 25 ° C. and 65% RH) Ω / cm ² Is preferred.
The surface electrical resistance is 1 × 10 ⁶ Ω / cm ² If the ratio is less than 1, the amount of toner when the toner is transferred to the image receiving layer is not sufficient, and the density of the obtained toner image is low. ¹⁵ Ω / cm ² Exceeds the required charge during transfer, the toner is not sufficiently transferred, the density of the image is reduced, and electrostatic charges are easily deposited during the handling of the electrophotographic image-receiving sheet. This is not preferable in that misfeeds, double feeds, discharge marks, toner transfer leakage, etc. are likely to occur.
[0092]
<< Other layers >>
The other layer is not particularly limited and may be appropriately selected depending on the intended purpose. Examples include a taste preparation layer, a storage stability improving layer, an adhesion preventing layer, an anti-curl layer, and a smoothing layer.
These may have a single layer structure or a laminated structure.
[0093]
The surface electrical resistance of the surface of the support opposite to the image receiving layer is usually 5 × 10. ⁸ ~ 3.2 × 10 ¹⁰ Ω / cm ² 1 × 10 ⁹ ~ 1x10 ¹⁰ Ω / cm ² Is preferred. The measurement of the surface electrical resistance is based on JIS K 6911, the sample is conditioned for 8 hours or more in an environment of a temperature of 20 ° C. and a humidity of 65%, and under the same environment, an R8340 manufactured by Advantest Corporation is used. It can be obtained by measuring after one minute has passed after energization under the condition of an applied voltage of 100V.
[0094]
In the electrophotographic image receiving sheet, a back layer can be provided on the side opposite to the image receiving layer with the support (the image forming material of the present invention) interposed therebetween.
[0095]
The opacity of the electrophotographic image-receiving sheet is preferably 85% or more, more preferably 90% or more, as measured by the method specified in JIS P 8138.
[0096]
In the electrophotographic image-receiving sheet, the protective layer of the image-receiving layer is used for the purpose of protecting the surface, improving storage stability, improving handleability, imparting writing properties, improving instrument passability, and imparting anti-offset properties. It can be provided on the surface. The protective layer may be a single layer or two or more layers.
Various types of thermoplastic resins, thermosetting resins, water-soluble polymers, and the like can be used as the binder in the protective layer, and preferably the same type as the image receiving layer is used. However, thermodynamic characteristics, electrostatic characteristics, and the like do not need to be the same as those of the image receiving layer, and are optimized.
[0097]
Any additive that can be used in the image receiving layer can be used for the protective layer, and a charge adjusting agent, a matting agent, a slipping agent, a release agent, and the like are preferably used. These can be used in addition to the protective layer.
[0098]
The outermost surface layer (for example, surface protective layer) of the electrophotographic image-receiving sheet of the present invention preferably has good compatibility with the toner from the viewpoint of fixability. Specifically, the contact angle with the molten toner Is preferably 40 degrees or less and 0 degrees or more.
[0099]
There is no restriction | limiting in particular as said matting agent, According to the objective, it can select suitably, For example, a solid particle etc. are mentioned.
The solid particles can be classified into inorganic particles and organic particles.
[0100]
Examples of the inorganic particles include oxides (eg, silicon dioxide, titanium oxide, magnesium oxide, aluminum oxide), alkaline earth metal salts (eg, barium sulfate, calcium carbonate, magnesium sulfate), and silver halides (eg, silver chloride). , Silver bromide) and glass.
[0101]
Examples of the inorganic particles include West German Patent 2529321, British Patent 760775, 1260772, U.S. Patents 1201905, 2192241, 3053662, 3030649, 3257206, 3322555, 3353958, and 3353958. 3370951, 3411907, 3437484, 3523022, 3615554, 3635714, 3769020, 40212245, and 4029504, and the like.
[0102]
Examples of the organic particles include starch, cellulose ester (for example, cellulose acetate propionate), cellulose ether (for example, ethyl cellulose), and synthetic resin.
[0103]
The synthetic resin is preferably a water-insoluble or poorly water-soluble synthetic resin. Examples of the water-insoluble or poorly water-soluble synthetic resin include poly (meth) acrylic acid esters (for example, polyalkyl (meth) acrylate, polyalkoxyalkyl (meth) acrylate, polyglycidyl (meth) acrylate), and poly (meth) acrylamide. , Polyvinyl ester (for example, polyvinyl acetate), polyacrylonitrile, polyolefin (for example, polyethylene), polystyrene, benzoguanamine resin, formaldehyde condensation polymer, epoxy resin, polyamide, polycarbonate, phenol resin, polyvinyl carbazole, polyvinylidene chloride, and the like. .
[0104]
The synthetic resin may be a copolymer obtained by combining repeating units of these polymers. In the case of the copolymer, a small amount of hydrophilic repeating units may be contained. Examples of the monomer that forms the hydrophilic repeating unit include acrylic acid, methacrylic acid, α, β-unsaturated dicarboxylic acid, hydroxyalkyl (meth) acrylate, sulfoalkyl (meth) acrylate, and styrenesulfonic acid. Can be mentioned.
[0105]
Examples of the organic particles include British Patent No. 1055713, U.S. Pat. Nos. 1,939,213, 2,218,873, 2,226,662, 2,223,037, 2,237,005, 2,2391181, No. 3443946, No. 3516832, No. 3539344, No. 3591379, No. 3754924, No. 3767448, and JP-A Nos. 49-106821 and 57-14835. Things.
[0106]
The said solid particle may be used individually by 1 type, and may use 2 or more types together. As an average particle diameter of the said solid particle, 1-100 micrometers is preferable and 4-30 micrometers is more preferable. The amount of the solid particles used is 0.01 to 0.5 g / m. ² Is preferred, 0.02-0.3 g / m ² Is more preferable.
[0107]
It is preferable that the electrophotographic image receiving sheet does not adhere to the fixing heating member at the time of fixing. Therefore, the 180 degree peel strength at the fixing temperature with the fixing member is preferably 0.1 N / 25 mm or less, and more preferably 0.041 N / 25 mm or less. The 180 degree peel strength can be measured according to the method described in JIS K6887 using the surface material of the fixing member.
[0108]
Examples of the slip agent include various known ones, such as higher alkyl sulfate, higher fatty acid higher alcohol ester, carbowax, higher alkyl phosphate ester, silicone compound, modified silicone, curable silicone, and the like. Further, polyolefin wax, fluorine-based oil, fluorine-based wax, carnauba wax, microcrystalline wax, silane compound, and the like can be given.
[0109]
Examples of the slip agent include U.S. Pat. Nos. 2,882,157, 3,210,060, 3,850,640, French Patent 2,180,465, British Patents 9,55061, 1,143118, 1,263,722, 1,270,578, 1,320,757. No. 2,588,765, No. 2,739,891, No. 3018178, No. 3042522, No. 3080317, No. 3030887, No. 31216060, No. 3222178, No. 3295979, No. 3,489567, No. 3679411, 3870521, JP-A-49-5017, 51-141623, 54-159221, 56-81841, etc., and Research Disclosure Jars those described in (Research Disclosure) No. 13969 and the like.
[0110]
The amount of the slip agent used is 5 to 500 mg / m in the case of so-called oil-less fixing in which no oil is used for the purpose of preventing offset to the fixing member in the fixing portion. ² 10 to 200 mg / m ² Is more preferable.
There is no restriction | limiting in particular in the usage-amount of the said slip agent, Although it can select suitably according to the objective, 30-3000 mg / m ² Is preferred, 100-1500 mg / m ² Is more preferable.
Among the slip agents, wax-based ones are difficult to dissolve in an organic solvent, so it is preferable to prepare an aqueous dispersion and prepare a dispersion with a thermoplastic resin solution and apply it. In this case, the wax-based slip agent is present in the form of fine particles in the thermoplastic resin. In this case, the amount of the slip agent used is 5 to 10,000 mg / m. ² Is preferable, 50-5000 mg / m ² Is more preferable.
[0111]
In the electrophotographic image-receiving sheet, for the purpose of imparting backside output suitability, improving backside output image quality, improving curl balance, imparting writability, inkjet, other print suitability, improving device passability, etc., A back layer can be provided on the side opposite to the side on which the layer is provided.
The back layer may have the same configuration as the image receiving layer side in order to improve the double-sided output suitability. In the back layer, the above-mentioned various additives can be used, and it is particularly preferable to use the above-mentioned matting agent, slip agent, charge adjusting agent and the like. The back layer may be a single layer or two or more layers.
In addition, when a releasable oil is used for the fixing roller or the like for preventing offset at the time of fixing, it is preferable that the back surface has oil absorbability.
[0112]
In the electrophotographic image receiving sheet, an adhesion improving layer can be provided for the purpose of improving adhesion between the support, the image receiving layer, and the other layers.
[0113]
The above-mentioned various additives can be used for the adhesion improving layer, and the above-mentioned crosslinking agent can be particularly preferably used. The electrophotographic image-receiving sheet can be provided with a cushion layer in order to improve toner acceptability. In addition, the electrophotographic image-receiving sheet of the present invention can be provided with a moisture-impermeable layer for the purpose of reducing the environmental humidity dependency in the storage state before output, the output state during output, and the print state after output.
Further, the electrophotographic image-receiving sheet of the present invention can be provided with an intermediate layer in addition to the various layers described above.
[0114]
Various additives can be used in the electrophotographic image-receiving sheet for the purpose of improving the stability of the output image and improving the stability of the image-receiving layer itself.
Examples of such additives include various known antioxidants, anti-aging agents, ultraviolet absorbers, light stabilizers, deterioration inhibitors, ozone deterioration inhibitors, preservatives, and antifungal agents.
[0115]
Examples of the antioxidant include a chroman compound, a coumaran compound, a phenol compound (eg, hindered phenol), a hydroquinone derivative, a hindered amine derivative, and a spiroindane compound. Examples of the antioxidant include those described in JP-A No. 61-159644.
[0116]
Examples of the anti-aging agent include those described in “Handbook Rubber / Plastic Compounding Chemicals Revised 2nd Edition” (1993, Rubber Digest Co.) p76-121.
[0117]
Examples of the ultraviolet absorber include a benzotriazole compound (described in U.S. Pat. No. 3,533,794), a 4-thiazolidone compound (described in U.S. Pat. No. 3,352,681), a benzophenone compound (described in JP-A-46-2784), ultraviolet absorption. And polymers (described in JP-A-62-260152).
Examples of the metal complexes include U.S. Pat. Nos. 4,241,155, 4,245,018 and 4,254,195, JP-A-61-88256, JP-A-62-147441, JP-A-63-199248, JP-A-1-75568, Examples described in the publications of JP-A 1-74272.
Preferred examples of the ultraviolet absorber and light stabilizer include those described in "Handbook Rubber / Plastic Compounding Chemical Revision 2nd Edition" (1993, Rubber Digest Co.) p122-137.
[0118]
The electrophotographic image-receiving sheet can be further added with known photographic additives.
As the photographic additive, for example, Research Disclosure Magazine (hereinafter abbreviated as RD) No. 17643 (December 1978), No. 18716 (November 1979) and 307105 (November 1989), and the corresponding parts are summarized as follows.
Type of additive RD17643 RD18716 RD307105
1. Brightener 24 pages 648 page right column 868 pages
2. Stabilizer 24 pages to 25 pages 649 page right column 868 to 870 pages
3. Light Absorber Page 25-26 Page 649 Right column Page 873
(UV absorber)
4). Dye image stabilizer 25 pages 650 pages right column 872 pages
5). Hardener 26 pages 651 pages left column 874-875 pages
6). Binder 26 pages 651 pages left column 873-874 pages
7). Plasticizer, Lubricant 27 pages 650 pages right column 876 pages
8). Application aid 26-27 pages 650 page right column 875-876 pages
(Surfactant)
9. Antistatic agent, page 27, page 650, right column, pages 876-877
10. Matting agent, 878-879 pages
[0119]
<Toner>
The electrophotographic image-receiving sheet of the present invention is used by allowing a toner image-receiving layer to receive toner during printing or copying.
The toner contains at least a binder resin and a colorant, and if necessary, a release agent and other components.
[0120]
-Toner binder resin-
Examples of the binder resin include styrenes such as styrene and parachlorostyrene; vinyl esters such as vinyl naphthalene, vinyl chloride, vinyl bromide, vinyl fluoride, vinyl acetate, vinyl propionate, vinyl benzoate, and vinyl butyrate; Methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, dodecyl acrylate, n-octyl acrylate, 2-chloroethyl acrylate, phenyl acrylate, methyl α-chloroacrylate, methyl methacrylate, methacryl Methylene aliphatic carboxylic acid esters such as ethyl acetate and butyl methacrylate; Vinyl nitriles such as acrylonitrile, methacrylonitrile, and acrylamide; Vinyl ethers such as vinyl methyl ether, vinyl ethyl ether, and vinyl isobutyl ether Tells; N-vinyl compounds such as N-vinyl pyrrole, N-vinyl carbazole, N-vinyl indole, N-vinyl pyrrolidone; single weight of vinyl monomers such as vinyl carboxylic acids such as methacrylic acid, acrylic acid and cinnamic acid Copolymers, copolymers thereof, and various polyesters can be used, and various waxes can be used in combination.
Among these resins, it is preferable to use resins of the same system as those used for the toner image receiving layer of the present invention.
[0121]
-Toner Colorant-
As the colorant, those usually used in toners can be used without limitation. For example, carbon black, chrome yellow, hansa yellow, benzidine yellow, sren yellow, quinoline yellow, permanent orange GTR, pyrazolone. Orange, Vulcan Orange, Watch Young Red, Permanent Red, Brilliantamine 3B, Brilliantamine 6B, Daypon Oil Red, Pyrazolone Red, Risor Red, Rhodamine B Lake, Lake Red C, Rose Bengal, Aniline Blue, Ultramarine Blue, Calco Examples include various pigments such as oil blue, methylene blue chloride, phthalocyanine blue, phthalocyanine green, and malachite green oxalelate. Acridine, xanthene, azo, benzoquinone, azine, anthraquinone, thioindico, dioxazine, thiazine, azomethine, indico, thioindico, phthalocyanine, aniline black, polymethine, triphenyl Examples include various dyes such as methane, diphenylmethane, thiazine, thiazole, and xanthene. These colorants may be used alone or in combination of two or more.
The content of the colorant is preferably in the range of 2 to 8% by mass. If the content of the colorant is 2% by mass or more, the coloring power is not weakened. On the other hand, if it is 8% by mass or less, the transparency is not impaired, which is preferable.
[0122]
-Toner release agent-
As the mold release agent, all known waxes can be used in principle, but polar waxes containing nitrogen such as relatively low molecular weight high crystalline polyethylene wax, Fischer-Tropsch wax, amide wax, urethane compound, etc. Etc. are particularly effective. The polyethylene wax having a molecular weight of 1000 or less is particularly effective, and a range of 300 to 1000 is more preferable.
[0123]
The compound having a urethane bond is suitable because even if it has a low molecular weight, the solid state can be maintained and the melting point can be set high for the molecular weight due to the strength of cohesive force due to the polar group. The preferred range of molecular weight is 300-1000. The raw materials are a combination of diisocyanate compounds and monoalcohols, a combination of monoisocyanic acid and monoalcohol, a combination of dialcohols and monoisocyanic acid, a combination of trialcohols and monoisocyanic acid, triisocyanic acid Various combinations such as combinations of compounds and monoalcohols can be selected, but in order not to increase the molecular weight, it is preferable to combine a compound of a polyfunctional group and a monofunctional group, and an equivalent functional group amount. It is important to ensure that
[0124]
Specific examples of the raw material compound include monoisocyanate compounds such as dodecyl isocyanate, phenyl isocyanate and derivatives thereof, naphthyl isocyanate, hexyl isocyanate, benzyl isocyanate, butyl isocyanate, and allyl isocyanate. It is done.
Examples of the diisocyanate compound include tolylene diisocyanate, 4,4′diphenylmethane diisocyanate, toluene diisocyanate, 1,3-phenylene diisocyanate, hexamethylene diisocyanate, 4-methyl-m-phenylene diisocyanate, and isophorone diisocyanate. Can be mentioned.
As the monoalcohol, it is possible to use very common alcohols such as methanol, ethanol, propanol, butanol, pentanol, hexanol, and heptanol.
Among the raw material compounds, as the dialcohols, a number of glycols such as ethylene glycol, diethylene glycol, triethylene glycol, trimethylene glycol; as the trialcohols, trimethylolpropane, triethylolpropane, trimethanolethane, etc. can be used. However, it is not necessarily limited to this range.
[0125]
These urethane compounds can be mixed with a resin and a colorant at the time of kneading and used as a kneaded and pulverized toner as in a normal release agent. Also, when used in the emulsion polymerization aggregation melting toner described above, it is dispersed in water together with a polymer electrolyte such as an ionic surfactant, a polymer acid or a polymer base, and heated to a melting point or higher to produce a homogenizer or pressure discharge. A fine dispersion is obtained by applying strong shearing with a mold disperser to prepare a release agent particle dispersion of 1 μm or less, which can be used together with a resin particle dispersion, a colorant dispersion and the like.
[0126]
-Toner and other components-
Further, the toner of the present invention may contain other components such as an internal additive, a charge control agent, and inorganic fine particles. As the internal additive, a magnetic material such as a metal such as ferrite, magnetite, reduced iron, cobalt, nickel, manganese, an alloy, or a compound containing these metals can be used.
[0127]
As the charge control agent, various commonly used charge control agents such as quaternary ammonium salt compounds, nigrosine compounds, dyes composed of complexes of aluminum, iron, chromium, and triphenylmethane pigments may be used. it can. A material that is difficult to dissolve in water is preferable from the viewpoint of controlling the ionic strength that affects the stability during aggregation and melting and reducing wastewater contamination.
[0128]
Examples of the inorganic fine particles include silica, alumina, titania, calcium carbonate, magnesium carbonate, tricalcium phosphate, and the like. Usually, all external additives on the toner surface are used. It is preferable to use it dispersed with a molecular base.
[0129]
Furthermore, surfactants can be used for emulsion polymerization, seed polymerization, pigment dispersion, resin particle dispersion, release agent dispersion, aggregation, and stabilization thereof. For example, anionic surfactants such as sulfate ester, sulfonate, phosphate, and soap, cationic surfactants such as amine salt type and quaternary ammonium salt type, polyethylene glycol type, alkylphenol It is also effective to use a nonionic surfactant such as an ethylene oxide adduct system or a polyhydric alcohol system in combination. As a dispersing means at that time, a general means such as a rotary shear type homogenizer, a ball mill having a media, a sand mill, a dyno mill or the like can be used.
[0130]
An external additive may be further added to the toner as necessary. Examples of the external additive include inorganic powder and organic particles. Examples of the inorganic particles include SiO. ₂ TiO ₂ , Al ₂ O ₃ , CuO, ZnO, SnO ₂ , Fe ₂ O ₃ , MgO, BaO, CaO, K ₂ O, Na ₂ O, ZrO ₂ , CaO · SiO ₂ , K ₂ O. (TiO ₂ ) _n , Al ₂ O ₃ ・ 2SiO ₂ , CaCO ₃ , MgCO ₃ , BaSO ₄ , MgSO ₄ Etc. can be illustrated. Moreover, as said organic particle, fatty acid or its derivative (s), powders, such as these metal salts, resin powders, such as a fluorine resin, a polyethylene resin, an acrylic resin, can be used. The average particle diameter of these powders is, for example, 0.01-5 μm, preferably 0.1-2 μm.
[0131]
The method for producing the toner is not particularly limited, and (i) a step of forming an aggregated particle in a dispersion obtained by dispersing resin particles to prepare an aggregated particle dispersion, (ii) in the aggregated particle dispersion. A step of adding and mixing a fine particle dispersion in which fine particles are dispersed to adhere the fine particles to the aggregated particles to form the adhered particles; and (iii) heating and fusing the adhered particles to form toner particles. It is preferable that the toner is manufactured by a toner manufacturing method including the steps.
[0132]
-Toner physical properties-
The volume average particle diameter of the toner of the present invention is preferably from 0.5 μm to 10 μm. If the volume average particle size of the toner is too small, there may be an adverse effect on toner handling (replenishability, cleaning properties, fluidity, etc.), and particle productivity may be reduced. On the other hand, if the volume average particle diameter of the toner is too large, the image quality and resolution due to graininess and transferability may be adversely affected.
Further, the toner of the present invention preferably satisfies the volume average particle size range of the toner and has a volume average particle size distribution index (GSDv) of 1.3 or less.
The ratio (GSDv / GSDn) of the volume average particle size distribution index (GSDv) to the number average particle size distribution index (GSDn) is preferably at least 0.95.
Further, the toner of the present invention preferably satisfies the volume average particle diameter range of the toner and has an average value of a shape factor represented by the following formula of 1.00 to 1.50.
Shape factor = [π × (2 × L) ² ] / (4 × S)
(However, L represents the maximum radius of the toner particles, and S represents the projected area of the toner particles.)
When the toner satisfies the above conditions, it is effective for image quality, particularly graininess, and resolution, and it is difficult for transfer and omission to occur, and handling properties are not adversely affected even if the average particle size is not small. Become.
[0133]
The storage elastic modulus G ′ (measured at an angular frequency of 10 rad / sec) at 150 ° C. of the toner itself is suitably 10 to 200 Pa from the viewpoint of improving the image quality and preventing the offset property in the fixing process.
[0134]
<Image forming method>
The image formation using the electrophotographic toner or the electrophotographic color toner on the electrophotographic image-receiving sheet is not particularly limited, and can be performed using a known electrophotographic image forming apparatus.
[0135]
In the electrophotographic image receiving material of the present invention, the toner transferred onto the image receiving material is fixed on the image receiving material using an electrophotographic apparatus having a fixing belt. As the belt fixing method, for example, an oilless type belt fixing method described in JP-A-11-352819, secondary transfer and fixing described in JP-A-11-231671 and JP-A-5-341666 are used. Methods to achieve at the same time are known. The electrophotographic apparatus having a fixing belt according to the present invention can convey, for example, at least a heating and pressurizing unit capable of melting and pressurizing a toner and an image receiving material to which the toner is adhered in a state of being in contact with the toner image receiving layer. An electrophotographic apparatus having a belt-type toner fixing unit having a fixing belt and, optionally, a cooling unit that can cool a heated image receiving material while attached to the fixing belt. By using an electrophotographic image-receiving material having a toner image-receiving layer in an electrophotographic apparatus having such a fixing belt, the toner adhering to the toner image-receiving layer is finely fixed without spreading on the image-receiving material and fixing. Since the molten toner is cooled and solidified in close contact with the belt, the toner is received in the toner image receiving layer in a state where the toner is completely embedded in the toner image receiving layer. Therefore, it is possible to obtain a glossy and smooth toner image with no image level difference.
[0136]
The electrophotographic image-receiving sheet formed according to the present invention is particularly suitable for an image forming method using an oil-less belt fixing method, whereby the offset is greatly improved. However, it can be similarly used for various other image forming methods.
For example, by using the electrophotographic image receiving sheet of the present invention, a full color image can be suitably formed while improving the image quality and preventing cracks. The color image can be formed using an electrophotographic apparatus capable of forming a full color image. A typical electrophotographic apparatus has an image receiving paper transport section, a latent image forming section, and a developing section disposed in the vicinity of the latent image forming section. Depending on the model, a latent image is formed at the center of the apparatus main body. A toner image intermediate transfer portion adjacent to the image receiving portion and the image receiving paper transport portion.
[0137]
Further, as a method for improving the image quality, an adhesive transfer or heat-assisted transfer system is known instead of or in combination with electrostatic transfer or bias roller transfer. For example, Japanese Patent Laid-Open Nos. 63-113576 and 5-341666 describe specific structures thereof. In particular, a method using an intermediate transfer belt of a heat assisted transfer system is preferable. For example, an endless belt made of electroformed nickel is used as the intermediate belt. Further, it is preferable to provide a cooling device for the intermediate belt after toner transfer to the electrophotographic image receiving sheet or in the latter half of the transfer. The cooling device cools the toner (toner image) to the softening temperature of the binder resin used in it or the glass transition temperature of the toner + 10 ° C. or lower, efficiently transfers it to the electrophotographic image-receiving sheet, and peels it from the intermediate belt. Is possible.
[0138]
Fixing is an important process that affects the gloss and smoothness of the final image. As the fixing method, fixing by a heat and pressure roller, belt fixing using a belt, and the like are known, but the belt fixing method is preferable from the viewpoint of the image quality such as gloss and smoothness. Regarding the belt fixing method, for example, an oilless type belt fixing method described in JP-A-11-352819, secondary transfer and fixing described in JP-A-11-231671, and JP-A-5-341666 are performed. Methods to achieve at the same time are known. Further, primary pressing with a heat roller may be performed before pressing and heating with the fixing belt and the fixing roller.
[0139]
The surface of the fixing belt may be subjected to a surface treatment of silicone, fluorine, or a combination thereof in order to prevent toner releasability or toner component offset. Further, it is preferable to provide a belt cooling device in the latter half of the fixing so that the electrophotographic image-receiving sheet is peeled off satisfactorily. The cooling temperature is preferably not higher than the softening point of the toner binder resin and / or the toner image-receiving polymer layer of the electrophotographic image-receiving sheet, or not higher than the glass transition point + 10 ° C. On the other hand, at the initial stage of fixing, it is necessary to raise the temperature to a temperature at which the toner image receiving layer or toner of the electrophotographic image receiving sheet is sufficiently softened. Specifically, the cooling temperature is preferably 70 ° C. or lower and 30 ° C. or higher in practice, and is preferably 180 ° C. or lower and 100 ° C. or higher in the initial fixing stage.
[0140]
Hereinafter, a specific description will be given based on FIG. 1 showing an example of an image forming apparatus having a typical fixing belt. The embodiment of the present invention is not limited to the embodiment shown in FIG.
First, the toner (12) is transferred to the electrophotographic image receiving sheet (10) by an image forming apparatus (not shown). The image receiving sheet (10) to which the toner (12) is adhered is conveyed to point A by a conveying facility (not shown), passes between the heating roller (14) and the pressure roller (15), and receives an image for electrophotography. The toner image-receiving layer or the toner (12) of the sheet (10) is heated and pressurized at a temperature (fixing temperature) and pressure at which it is sufficiently softened.
[0141]
Here, the fixing temperature means the temperature of the surface of the toner image-receiving layer measured at the position of the heating roller (14), the pressure roller (15) and the nip portion at point A, and is preferably 80 to 190 ° C., for example. Is 100-170 ° C. The pressure means the pressure on the surface of the toner image receiving layer measured at the nip portion with the heating roller (14), the pressure roller (15), and is, for example, 1 to 10 kg / cm. ² More preferably, 2-7 kg / cm ² It is. While being heated and pressurized in this manner, the electrophotographic image-receiving sheet (1) was later separated from the toner image-receiving layer while being conveyed to the cooling device (16) by the fixing belt (13). The mold (not shown) is sufficiently heated and melted, and moves to the surface of the toner image receiving layer. The released release agent forms a release agent layer (film) on the surface of the toner image-receiving layer. Thereafter, the electrophotographic image-receiving sheet (10) is conveyed to the cooling device (16) by the fixing belt (13), for example, below the softening point of the polymer of the toner image-receiving layer and / or the binder resin used for the toner, or It is cooled to a temperature of glass transition point + 10 ° C. or lower, preferably 20 to 80 ° C., more preferably room temperature (25 ° C.). As a result, the release agent layer (film) formed on the surface of the toner image receiving layer is cooled and solidified, and a release agent layer is formed by the change of the release agent in the toner image receiving layer.
The cooled electrophotographic image receiving sheet (10) is further conveyed to point B by the fixing belt (13), and the fixing belt (13) moves on the tension roller (17). Accordingly, the electrophotographic image receiving sheet (10) and the fixing belt (13) are peeled off at the point B. In addition, it is preferable to set the diameter of the tension roll to be small so that the electrophotographic image-receiving sheet is peeled off from the belt by its own rigidity (waist strength).
[0142]
Here, it is appropriate that the fixing belt used in the image forming apparatus is an endless belt formed using, for example, polyimide, electroformed nickel, aluminum, or the like as a base material.
It is preferable that a thin film made of at least one selected from the group consisting of silicone rubber, fluororubber, silicone resin, and fluororesin is formed on the surface of the fixing belt. Among these, a mode in which a fluorocarbon siloxane rubber layer having a uniform thickness is provided on the surface of the fixing belt, a silicone rubber layer having a uniform thickness on the surface of the fixing belt, and the silicone rubber layer An embodiment in which a fluorocarbonsiloxane rubber layer is provided on the surface is preferred.
[0143]
The fluorocarbon siloxane rubber preferably has a perfluoroalkyl ether group and / or a perfluoroalkyl group in the main chain.
Such a fluorocarbon siloxane rubber includes (A) a fluorocarbon siloxane having the following general formula (1) as a main component and an aliphatic unsaturated group, and (B) two or more ≡SiH groups in one molecule. Organopolysiloxane and / or fluorocarbon siloxane, wherein the content of the ≡SiH group is 1 to 4 times the molar amount of the aliphatic unsaturated group in the fluorocarbon siloxane rubber composition, (C) filling A cured product of a fluorocarbon siloxane rubber composition containing an agent and (D) an effective amount of a catalyst is preferably used.
[0144]
The (A) component fluorocarbon polymer is mainly composed of a fluorocarbon siloxane having a repeating unit represented by the following general formula (1) and has an aliphatic unsaturated group.
[0145]
[Chemical 1]

[0146]
Here, in the above formula (1), R ¹⁰ Is an unsubstituted or substituted monovalent hydrocarbon group having preferably 1 to 8 carbon atoms, preferably an alkyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 3 carbon atoms, particularly a methyl group. Is preferred. a and e are each 0 or 1, b and d are each an integer of 1 to 4, and c is an integer of 0 to 8. Moreover, x is an integer greater than or equal to 1, Preferably it is 10-30.
[0147]
Examples of the component (A) include those represented by the following formula (2).
[0148]
[Chemical 2]

[0149]
In the component (B), examples of the organopolysiloxane having ≡SiH groups include organohydrogenpolysiloxanes having at least two hydrogen atoms bonded to silicon atoms in the molecule.
[0150]
In the fluorocarbon siloxane rubber composition used in the present invention, when the fluorocarbon polymer of the component (A) has an aliphatic unsaturated group, the above-described organohydrogenpolysiloxane can be used as a curing agent. . That is, in this case, a cured product is formed by an addition reaction that occurs between an aliphatic unsaturated group in the fluorocarbon siloxane and a hydrogen atom bonded to a silicon atom in the organohydrogenpolysiloxane.
[0151]
As such organohydrogenpolysiloxane, various organohydrogenpolysiloxanes used in addition-curable silicone rubber compositions can be used.
[0152]
The above-mentioned organohydrogenpolysiloxane generally has at least one ≡SiH group, particularly 1 to 5 with respect to one aliphatic unsaturated hydrocarbon group in the fluorocarbon siloxane of component (A). It is suitable to mix | blend in such a ratio.
[0153]
Further, the fluorocarbon having an ≡SiH group may be a unit of the above formula (1) or R in the formula (1). ¹⁰ Is a dialkylhydrogensiloxy group and the terminal is preferably a SiH group such as a dialkylhydrogensiloxy group or a silyl group, and examples thereof include those represented by the following formula (3).
[0154]
[Chemical 3]

[0155]
As the filler of component (C), various fillers used in general silicone rubber compositions can be used. For example, fumed silica, precipitated silica, carbon powder, titanium dioxide, aluminum oxide, quartz powder, reinforcing fillers such as talc, sericite and bentonite, fibrous fillers such as asbestos, glass fiber, organic fiber, etc. It can be illustrated.
[0156]
As the catalyst of component (D), chloroplatinic acid, alcohol-modified chloroplatinic acid, complexes of chloroplatinic acid and olefin, platinum black or palladium, which are known as addition reaction catalysts, platinum, alumina, silica, carbon, etc. Examples include those supported on a carrier, complex of rhodium and olefin, group VIII element of periodic table such as chlorotris (triphenylphosphine) rhodium (Wilkinson catalyst), rhodium (III) acetylacetonate, etc. However, these complexes are preferably used by dissolving in a solvent such as alcohol, ether, or hydrocarbon.
[0157]
In the fluorocarbon siloxane rubber composition used in the present invention, various compounding agents can be added as long as the object of the present invention to improve solvent resistance is not impaired. For example, diphenylsilane diol, low-polymerization degree molecular chain terminal hydroxyl-blocked dimethylpolysiloxane, dispersant such as hexamethyldisilazane, heat resistance improver such as ferrous oxide, ferric oxide, cerium oxide, iron octylate Further, colorants such as pigments can be blended as necessary.
[0158]
The fixing belt of the present invention is obtained by coating the surface of a heat resistant resin or metal belt body with the fluorocarbon siloxane rubber composition, followed by heat curing. It can be diluted with a solvent such as hexafluoride or benzotrifluoride to form a coating solution, which can be applied by a general coating method such as spray coating, dip coating or knife coating. The temperature and time for heat curing can be selected as appropriate, and are selected according to the type of belt body and the manufacturing method, etc., in the range of normal temperature of 100 to 500 ° C. and time of 5 seconds to 5 hours.
[0159]
The thickness of the fluorocarbon siloxane rubber layer formed on the surface of the fixing belt is not particularly limited. However, in order to obtain good image fixing properties by preventing toner releasability or toner component offset. 500 μm, particularly 40 to 200 μm is preferable.
[0160]
The method for forming an image on the electrophotographic image-receiving sheet of the present invention is not particularly limited to the method shown in FIG. 1 as long as it is an electrophotographic method using a fixing belt. Any ordinary electrophotographic method can be applied.
For example, a color image can be preferably formed on the electrophotographic image-receiving sheet of the present invention. The color image can be formed using an electrophotographic apparatus capable of forming a full color image. A typical electrophotographic apparatus has an image receiving sheet conveying section, a latent image forming section, and a developing section arranged close to the latent image forming section. Depending on the model, a latent image is formed at the center of the apparatus main body. A toner image intermediate transfer portion in proximity to the image receiving portion and the image receiving sheet conveying portion.
[0161]
Furthermore, as a method for improving the image quality, an adhesive transfer or heat-assisted transfer system is known instead of or in combination with electrostatic transfer or bias roller transfer. For example, Japanese Patent Laid-Open Nos. 63-113576 and 5-341666 describe specific structures thereof. In particular, a method using a heat-assisted transfer type intermediate transfer belt is preferable when a toner having a small particle diameter is used.
[0162]
According to the image forming method of the present invention, even when an oilless machine having no fixing oil is used, it is possible to prevent the image receiving sheet and the toner from being peeled off or the image receiving sheet and the toner component from being offset, thereby realizing stable paper feeding. At the same time, it is possible to realize a good image having unprecedented good glossiness and rich in photographic feeling.
[0163]
As described above, an image using the electrophotographic toner and a color image using the electrophotographic color toner are formed on the electrophotographic image receiving sheet.
[0164]
<Thermal material>
The heat-sensitive material has, for example, a configuration in which at least a heat-meltable ink layer as an image-forming layer is provided on the image-forming material of the present invention, and is heated from a heat-meltable ink layer by a heat-sensitive head. An ink layer containing at least a heat-diffusible dye (sublimation dye) is provided on the heat-sensitive transfer sheet used in the system for melting and transferring ink onto the image-receiving sheet for heat-sensitive transfer recording or the image forming material of the present invention. A thermal transfer sheet used in a sublimation transfer system that is heated by a thermal head and transfers a thermal diffusible dye from an ink layer onto a thermal transfer recording image-receiving sheet, on the image forming material of the present invention, The thermoautochrome system (TA system) has a structure with at least a thermochromic layer and forms images by repeated heating with a thermal head and fixing with ultraviolet rays. Heat sensitive material or the like used Te and the like.
[0165]
<Rewritable display material (electronic paper)>
As the rewritable display material, electronic paper is particularly preferable. Examples of the electronic paper include an EC element type using an electrochromic element, an electrophoresis type using electrophoresis, and a twist ball type using the image forming material of the present invention as a support. Among these, in particular, the viewing angle dependency is excellent and the structure is simple, so it is easy to increase the size, various colors can be obtained by selecting materials, the movement of electrons is blocked and the redox state is maintained. The EC element type is the most preferable because it has various advantages such as excellent memory performance because the display state can be stopped, and low power consumption because no power is required to maintain the display state.
[0166]
<< EC element type electronic paper >>
The EC element-type electronic paper preferably has at least an EC element composed of a pair of electrodes for holding the electrochromic colored layer on the image forming material of the present invention.
[0167]
There is no restriction | limiting in particular as said electrochromic coloring layer, A normally well-known electrochromic pigment | dye, electrolyte, etc. can be used.
[0168]
The electrochromic dye is not particularly limited as long as it exhibits an action of coloring or decoloring by at least one of an electrochemical oxidation reaction and a reduction reaction, and can be appropriately selected according to the purpose, for example, an organic compound, A metal complex etc. are mentioned suitably. These may be used individually by 1 type and may use 2 or more types together.
[0169]
Examples of the metal complex include Prussian blue, metal-bipyridyl complex, metal phenanthroline complex, metal-phthalocyanine complex, metaferricyanide, and derivatives thereof.
[0170]
Examples of the organic material include (1) pyridine compounds, (2) conductive polymers, (3) styryl compounds, (4) donor / acceptor type compounds, (5) other organic dyes, and the like. Is mentioned.
[0171]
Examples of the (1) pyridine compounds include viologen, heptyl viologen (diheptyl viologen dibromide, etc.), methylenebispyridinium, phenanthroline, azobipyridinium, 2,2-bipyridinium complex, quinoline / isoquinoline, and the like.
[0172]
Examples of the conductive polymer (2) include polypyrrole, polythiophene, polyaniline, polyphenylenediamine, polyaminophenol, polyvinylcarbazole, polymer viologen polyion complex, TTF, and derivatives thereof.
[0173]
Examples of the (3) styryl compounds include 2- [2- [4- (dimethylamino) phenyl] ethenyl] -3,3-dimethylindolino [2,1-b] oxazolidine, 2- [4- [4- (Dimethylamino) phenyl] -1,3-butadienyl] -3,3-dimethylindolino [2,1-b] oxazolidine, 2- [2- [4- (dimethylamino) phenyl] ethenyl]- 3,3-dimethyl-5-methylsulfonylindolino [2,1-b] oxazolidine, 2- [4- [4- (dimethylamino) phenyl] -1,3-butadienyl] -3,3-dimethyl-5 -Sulfonylindolino [2,1-b] oxazolidine, 3,3-dimethyl-2- [2- (9-ethyl-3-carbazolyl) ethenyl] indolino [2,1-b] oxazolidine 2- [2- [4- (acetylamino) phenyl] ethenyl] -3,3-dimethyl-indolino [2,1-b] oxazolidine, and the like.
[0174]
Examples of the (4) donor / acceptor type compounds include tetracyanoquinodimethane and tetrathiafulvalene.
[0175]
Examples of (5) other organic dyes include carbazole, methoxybiphenyl, anthraquinone, quinone, diphenylamine, aminophenol, Tris-aminophenylamine, phenylacetylene, cyclopentyl compound, benzodithiolium compound, squalium salt, cyanine, rare earth Examples include phthalocyanine complexes, ruthenium diphthalocyanines, merocyanines, phenanthroline complexes, pyrazolines, redox indicators, pH indicators, and derivatives thereof.
[0176]
Among these, viologen dyes such as viologen and heptyl viologen (such as diheptyl viologen dibromide) are preferable.
[0177]
A combination of two or more of the electrochromic dyes is not particularly limited and may be appropriately selected depending on the intended purpose. For example, a combination of viologen and polyaniline, a combination of polypyrrole and polymethylthiophene , A combination of polyaniline and Prussian blue, and the like.
[0178]
Examples of the electrolyte include iodine, bromine, LiI, NaI, KI, CsI, and CaI. ₂ , LiBr, NaBr, KBr, CsBr, CaBr ₂ Metal halides such as tetraethylammonium iodide, tetrapropylammonium iodide, tetrabutylammonium iodide, tetramethylammonium bromide, tetraethylammonium bromide, tetrabutylammonium bromide halides, methyl viologen, etc. At least one of an alkyl viologen such as chloride and hexyl viologen bromide, a polyhydroxybenzene such as hydroquinone and naphthohydroquinone, an iron complex such as ferrocene and ferrocyanate can be used, but is not limited thereto. .
[0179]
<Printing paper>
The image forming material of the present invention is also preferably used as printing paper. In this case, it is preferable to use paper as the substrate and use the substrate side as a printing surface. Further, when the image forming material of the present invention is used as a printing paper, a material having high mechanical strength is preferable from the viewpoint of applying ink or the like by a printing machine.
[0180]
When paper is used as the substrate, the paper preferably contains a filler, a softening agent, an internal additive for papermaking, and the like. As fillers, commonly used ones can be used, for example, clay, calcined clay, diatomaceous earth, talc, kaolin, calcined kaolin, deramikaolin, heavy calcium carbonate, light calcium carbonate, magnesium carbonate, barium carbonate, titanium dioxide. Inorganic fillers such as zinc oxide, silicon oxide, amorphous silica, aluminum hydroxide, calcium hydroxide, magnesium hydroxide, and zinc hydroxide, organic fillers such as urea-formalin resin, polystyrene resin, phenol resin, and fine hollow particles , Etc. These may be used alone or in combination of two or more.
[0181]
Examples of the internal additive for papermaking include various conventionally used nonionic, cationic, and anionic yield improvers, freeness improvers, paper strength improvers, and internally added sizing agents. Can be mentioned. Specifically, basic aluminum compounds such as sulfate band, aluminum chloride, sodium aluminate, basic aluminum chloride, basic polyaluminum hydroxide; polyvalent metal compounds such as ferrous sulfate and ferric sulfate, starch , Modified starch, polyacrylamide, urea resin, melamine resin, epoxy resin, polyamide resin, polyamine resin, polyamine, polyethyleneimine, vegetable gum, polyvinyl alcohol, latex, polyethylene oxide and other water-soluble polymers, hydrophilic cross-linked polymer particle dispersion And various compounds such as derivatives and modified products thereof, and these materials simultaneously have some of the functions as an internal additive for papermaking.
[0182]
Next, as the functions of the internal sizing agent, the alkyl ketene dimer compound, alkenyl succinic anhydride compound, styrene-acrylic compound, higher fatty acid compound, petroleum resin sizing agent and rosin sizing agent are used. Is mentioned.
[0183]
Furthermore, internal additives for papermaking such as dyes, fluorescent brighteners, pH adjusters, antifoaming agents, pitch control agents, slime control agents and the like may be appropriately added depending on the intended use.
[0184]
The printing paper is particularly suitable as offset printing paper, and can be used as letterpress printing paper, gravure printing paper, and electrophotographic paper.
[0185]
According to the method for producing an image forming material of the present invention described above, the image forming material of the present invention having excellent water resistance and surface smoothness and good gloss can be efficiently produced. The image forming material of the present invention can be particularly suitably used as a sheet material, a support and the like in various fields.
[0186]
【Example】
Examples of the present invention will be described below, but the present invention is not limited to these examples. In the following, “%” and “part” represent “% by mass” and “part by mass”, respectively.
[0187]
(Example 1)
-Preparation of substrate-
Hardwood bleached kraft pulp (LBKP) was beaten with a disc refiner to 300 cc (Canadian standard freeness, CFS) and adjusted to a fiber length of 0.58 mm. Additives were added to the pulp stock at the following ratio based on the mass of the pulp.
・ Cation starch …… 1.2%
・ Alkyl ketene dimer (AKD) ・ ・ ・ ・ ・ ・ 0.5%
・ Anionic polyacrylamide: 0.3%
・ Epoxidized aliphatic amide (EFA) 0.2%
・ Polyamide polyamine epichlorohydrin ・ 0.3%
The alkyl part in the alkyl ketene dimer (AKD) is derived from a fatty acid mainly composed of behenic acid, and the fatty acid part in the epoxidized aliphatic amide (EFA) is derived from a fatty acid mainly composed of behenic acid. doing.
[0188]
The pulp paper stock obtained as described above was 165 g / m in basis weight with a long net paper machine. ² Was made. Polyvinyl alcohol (PVA) 1.0 g / m by a size press machine in the middle of the drying zone of the long paper machine. ² , CaCl ₂ 0.8g / m ² Attached. And at the end of the paper making process, the density is 1.01 g / cm using a soft calendar. ³ Adjusted. The substrate (base paper) obtained as described above was passed through such that the metal roll (surface temperature: 140 ° C.) was in contact with the side on which the image receiving layer was formed. As described above, the substrate (thickness: 160 μm, surface smoothness (Oken smoothness) = 265 seconds, stehito size / size = 127 seconds, 20 ° glossiness = 0 °, bump size water absorption (conforms to JIS Z 8741) (300 Second) = 33.7 g / m ² ) Was produced.
[0189]
<Evaluation of water resistance>
The obtained support for an image forming material was measured for the Kobb size water absorbency (300 seconds) defined by JIS P 8140 to find 3.2 g / m. ² Met.
The water resistance is 5 g / m for practical use in terms of the hump size water absorption (300 seconds). ² Desirably less than.
[0190]
-Production of image forming material (support 1)-
64 g / m of a thermoplastic resin latex-containing liquid (minimum film-forming temperature (MFT) = 35 ° C.) having the following composition on the back surface of the obtained base paper ² Then, it was applied with a bar coater to form a coating film. After air drying at 50 ° C., 64 g / m of a thermoplastic resin latex-containing liquid was similarly applied to the surface of the base paper. ² The coating was applied to form a coating film and air-dried at 50 ° C. Thereafter, the surface was disposed on the belt side, and was processed by a cooling peeling type post-processing machine (endless press) as shown in FIG. In this treatment, the surface temperature of the belt member when the coating film and the surface of the belt member were brought into contact with each other was 145 ° C. Moreover, the surface temperature in the coating film at the time of peeling was 45 ° C., and the melt viscosity (storage modulus (G ′)) at this time was 1 MPa or more (3.5 MPa).
Separately, when the surface temperature of the coating film when the coating film and the surface of the belt member were brought into contact with each other was measured, it was found that the coating film was heated to a maximum of 110 ° C. The melt viscosity (storage modulus (G ′)) of the coating film at the maximum heating temperature was 0.3 MPa.
[0191]
<Composition of thermoplastic resin latex-containing liquid>
-Thermoplastic resin latex (Daicel Chemical's Aquabrid 4635; acrylic resin, soap-free, solid content 35%, Tg = 60 ° C, minimum film-forming temperature (MFT) = 30 ° C)・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ 100g
・ Anionic surfactant (AOT) ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ 0.25g
・ White pigment dispersion ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ 10g
(Titanium oxide 40%, Kuraray PVA-205, 5%, containing anionic surfactant)
・ Fluorescent image whitening agent dispersion ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ 1g
(Manufactured by Ciba-Gaigi, UVTEX-OB, 46%, containing a small amount of nonionic and anionic surfactants.)
[0192]
In the cooling peeling type belt type processing machine (endless press) shown in FIG. 2, the processing unit 1 includes a belt 2, a heating roller 3, a pressure roller 4, a tension roller 5, a cleaning roller 6, and a cooling device. 7 and a conveyance roller 8.
[0193]
Inside the belt 2, the belt 2 and a pair of tension rollers 5 are arranged. The belt 2 is rotatably stretched by a heating roller 3 and a pair of tension rollers 5 disposed at a position away from the heating roller 3. The pressure roller 4 is disposed in contact with the heating roller 3 in contact with the belt 2. The pressure roller 4 and the belt 2 are pressed by the pressure roller 4 and the heating roller 3 to form a nip portion. The cooling device 7 is disposed inside the belt 2 and between the heating roller 3 positioned on the upstream side and the tension roller 5 positioned on the downstream side in the rotation direction of the belt 2.
Two transport rollers 8 are arranged so as to face the cooling device 7 with the belt 2 interposed therebetween. Here, the distance between the two conveying rollers is substantially the same length as the distance between the nip portion and one of the conveying rollers 8 and the distance between the tension roller 5 and the other one of the conveying rollers 8. The cleaning roller 6 is disposed so as to face the opposite side of the heating roller 3 from the side facing the pressure roller 4 via the belt 2. The cleaning roller 6 and the belt 2 are pressurized by the cleaning roller 6 and the heating roller 3. The heating roller 3, the pressure roller 4, the tension roller 5, the cleaning roller 6, and the transport roller 8 can rotate in conjunction with each other to rotate the belt 2.
In the processing section 1, the surface of the belt 2 was coated with SIFFL manufactured by Shin-Etsu Chemical Co., Ltd., and the surface roughness (arithmetic average roughness (Ra)) was 0.8 μm.
The pressure between the rollers (nip pressure) is 7.5 kg / cm. ² Met.
[0194]
<Evaluation of surface smoothness and gloss>
When the 20-degree glossiness of the obtained image forming material (support) was measured based on JIS Z 8741, it was 35 degrees.
[0195]
<Evaluation of water resistance>
The obtained support for an image forming material was measured for the Kobb size water absorbency (300 seconds) defined by JIS P 8140 to find 3.2 g / m. ² Met. The hump size water absorption (300 seconds) is a value obtained by measuring the water absorption when pure water is brought into contact with a sample for 300 seconds.
[0196]
-Preparation of image-receiving layer and preparation of electrophotographic image-receiving sheet-
Components having the following composition were mixed and stirred to prepare an image-receiving layer coating solution. The resulting image-receiving layer coating solution was coated with 5 g / m of polyester resin on the image-forming material (support) using a bar coater. ² Then, an electrophotographic image-receiving sheet was prepared.
[0197]
-Composition of coating solution for image-receiving layer-
・ Polyester resin water dispersion ... 100.0g
(Solid content 30%, KZA-7049, manufactured by Unitika)
・ Anionic surfactant (AOT) ・ ・ ・ ・ ・ ・ 0.5g
・ Polyethylene oxide thickener ・ ・ ・ ・ ・ ・ 3g
Carnauba wax dispersion (solid content 30% by mass) ... 5g
・ Ion-exchanged water ... 80ml
[0198]
<Color image formation>
A color image was formed on the produced electrophotographic image-receiving sheet as follows.
An electrophotographic printer (manufactured by Fuji Xerox Co., Ltd .; DocuCenter Color 400CP) was used as the color image forming apparatus. In this electrophotographic printer, the fixing unit was used in place of the belt fixing unit shown in FIG. Using this electrophotographic printer, a gray rectangular image and a blue rectangular image were formed in which the density was changed stepwise from a white background to the maximum density (black) under the conditions of 23 ° C. and 55% RH. After these image formations, fixing was performed with the belt fixing device shown in FIG. 3 with the image forming surface facing upward.
[0199]
The color image forming apparatus includes an electrostatic latent image carrier, an electrostatic latent image forming unit, a developing unit, a transfer unit, and a fixing unit. The electrostatic latent image forming unit includes a charger and an exposure unit, the developing unit includes a developing unit for each toner of cyan toner, yellow toner, magenta toner, and black toner, and the transfer unit is an intermediate transfer unit. The fixing unit includes the fixing unit shown in FIG. 2 described above.
[0200]
In the color image forming apparatus, an electrostatic latent image of a rectangular image is formed by the electrostatic latent image forming unit. The developing unit develops the electrostatic latent image of the rectangular image using cyan, yellow, magenta, and black electrophotographic toners, and the gray rectangular image and the blue color of which the density is changed stepwise. A rectangular image was formed. The transfer means transfers the gray rectangular image and the blue rectangular image whose density has been changed stepwise to the electrophotographic image receiving sheet. The fixing unit fixed the gray rectangular image and the blue rectangular image, which were transferred to the electrophotographic image-receiving sheet and gradually changed in density. As a result, a gray rectangular image and a blue rectangular image in which the density was changed stepwise were formed on the electrophotographic image receiving sheet.
[0201]
Here, in the fixing unit 1 ′, first, a gray rectangular image and a blue rectangular image whose density has been changed stepwise are formed on the image receiving layer 10a ′, and the transferred electrophotographic image receiving sheet 10 ′ is formed. Then, the toner is conveyed to the nip portion and passes through the nip portion. The image receiving layer 10a ′ in the electrophotographic image receiving sheet 10 ′ is positioned on the belt 2 ′ side.
The electrophotographic toner constituting the gray and blue rectangular images formed on the surface of the image receiving layer of the electrophotographic image receiving sheet 10 ′ is heated by the heating roller 3 ′ and the pressure roller 4 ′ when passing through the nip portion. While being pressed onto the image receiving layer 10a ′ by the pressing force, it is melted by the heat from the heating roller 3 ′ and fixed to the image receiving layer 10a ′. At this time, since the resin in the image receiving layer 10a ′ is also melted, the melted electrophotographic toner and the image receiving layer 10a ′ are firmly integrated with each other. Next, the electrophotographic image-receiving sheet 10 ′ that has passed through the nip portion is stuck to the surface of the belt 2 ′ while the image-receiving layer 10a ′ and the electrophotographic toner constituting the gray and blue rectangular images are melted. Is conveyed to the cooling device 7 side. Then, the back surface of the electrophotographic image receiving sheet 10 ′ where the image receiving layer 10a ′ is not provided is conveyed to the tension roller 5 ′ side by the conveying roller 8 ′. At this time, the image receiving layer 10a ′ in the electrophotographic image receiving sheet 10 ′ and the electrophotographic toner constituting the gray and blue rectangular images are cooled by the cooling device 7 together with the belt 2 ′, and solidified in an integrated state. The The electrophotographic image receiving sheet 10 ′ is peeled from the belt 2 ′ at a position where the tension roller 5 ′ rotates.
As described above, the gray and blue rectangular images were formed on the surface of the image receiving layer 10a ′ of the electrophotographic image receiving sheet 10 ′. The surface of the image receiving layer 10a ′ is smoothed by the surface of the belt 2 ′.
[0202]
The belt 2 ′ from which the electrophotographic image receiving sheet 10 ′ has been peeled is rotated to the heating roller 3 ′ side by the next tension roller 5 ′, and is disposed opposite the heating roller 3 ′ at the heating roller 3 ′. The cleaning roller 6 ′ removes dirt such as the electrophotographic toner adhering to the surface. The belt 2 'from which the dirt has been removed by the cleaning roller 6' is subjected to the next fixing process.
[0203]
As a fixing belt base material, DY39-115 which is a primer for silicone rubber made by Toray Dow Corning Silicone Co., Ltd. is applied on a base layer made of polyimide, air-dried for 30 minutes, and then DY35-796AB 100 which is a silicone rubber precursor. A coating film was formed by dip coating the coating liquid prepared with 30 parts of n-hexane and n-hexane, and primary vulcanization was performed at 120 ° C. for 10 minutes to obtain 40 μm of silicone rubber.
On this silicone rubber layer, 100 parts of SIFEL610, a fluorocarbon siloxane rubber precursor manufactured by Shin-Etsu Chemical Co., Ltd., and a fluorinated solvent (mixed solvent of m-xylene hexafluoride, perfluoroalkane, perfluoro (2-butyltetrahydrofuran)) 20 After forming a coating film by dip coating the coating solution prepared by the part, primary vulcanization at 120 ° C. for 10 minutes and secondary vulcanization at 180 ° C. for 4 hours are performed, and the fluorocarbon siloxane rubber has a film thickness of 20 μm. A fixing belt was used.
[0204]
<Evaluation of color image>
<< Evaluation of glossiness on white background >>
After forming a color image, the 20-degree glossiness at the white background was measured in the same manner as described above. The results are shown in Table 1.
[0205]
<< Evaluation of swell >>
The waviness in the electrophotographic image-receiving sheet after forming the color image was visually evaluated according to the following evaluation criteria. The results are shown in Table 1.
[0206]
-Evaluation criteria for swell-
○: No swell due to image formation is observed.
Δ: Swelling due to image formation is slightly observed, but at a level where there is no problem in practical use.
X: Swelling due to image formation is observed remarkably.
[0207]
<< Evaluation of blister generation near fixing temperature >>
The presence or absence of blistering around the fixing temperature (110 ° C., 120 ° C., 130 ° C.) when forming a color image was evaluated according to the following evaluation criteria. The results are shown in Table 1.
-○: No bubbles are seen at all.
Δ: Bubbles can be confirmed when enlarged 10 times or more.
*: Bubbles are visually observed.
[0208]
(Comparative Example 1)
-Preparation of substrate-
A substrate was prepared in the same manner as in “Preparation of substrate” in Example 1.
-Production of image forming material (support 2)-
3.0g / cm of rutile titanium dioxide on the back ² High density polyethylene (MI = 10g / 10min, density 0.950g / cm ³ ) Was extruded by an extrusion coating method (310 ° C.) to form a back polyethylene layer having a thickness of 0.30 mm. Next, on the surface of the substrate, high density polyethylene (MI = 8 g / 10 min, density 0.950 g / cm). ³ ) And low density polyethylene (MI = 7 g / 10 min, density 0.923 g / cm) ³ ) And a blend of 1/1 (mass ratio) (anatase type titanium dioxide 3.0 g / m ² In the same manner, an extrusion coating method is used to form a surface polyethylene layer having a thickness of 0.030 mm to form an image-forming material (support 2) (20-degree glossiness = 8 degrees, bump size water absorption (300 seconds) = 0.5g / m ² ) Was produced.
Evaluation was performed in the same manner as in Example 1. The results are shown in Table 1.
[0209]
(Example 2)
In addition to changing the thermoplastic latex to prototype A (acrylic resin, soap-free, solid content 35%, Tg = 55 ° C., MFT = 30 ° C.) in “Preparation of thermoplastic resin latex-containing liquid” in Example 1 The image forming material (support 3) (20-degree glossiness = 60 degrees, Cobb size water absorption (300 seconds) = 0.9 g / m as in Example 1. ² ) Was produced. The minimum film-forming temperature of the thermoplastic resin latex-containing liquid is 20 ° C., and the melt viscosity (storage modulus (G ′)) (45 ° C.) of the coating film at the time of peeling is 1 MPa or more (2.4 MPa). there were.
Separately, when the surface temperature of the coating film when the coating film and the surface of the belt member were brought into contact with each other was measured, it was found that the coating film was heated to a maximum of 110 ° C. The melt viscosity (storage modulus (G ′)) of the coating film at the maximum heating temperature was 0.08 MPa.
Further, in the same manner as in Example 1, an electrophotographic image receiving sheet was prepared, a color image was formed, and evaluation was performed. The results are shown in Table 1.
[0210]
(Example 3)
In addition to changing the thermoplastic latex to prototype B (acrylic resin, soap free, solid content 35%, Tg = 47 ° C., MFT = 25 ° C.) in “Preparation of thermoplastic resin latex-containing liquid” in Example 1 Is the same as in Example 1 (image forming material (support 4) (20-degree glossiness = 17 degrees, Cobb size water absorption (300 seconds)) = 1.4 g / m. ² ) Was produced. The minimum film-forming temperature of the thermoplastic resin latex-containing liquid was 15 ° C., and the melt viscosity (storage modulus (G ′)) (45 ° C.) of the coating film at the time of peeling was 0.7 MPa.
Separately, when the surface temperature of the coating film when the coating film and the surface of the belt member were brought into contact with each other was measured, it was found that the coating film was heated to a maximum of 110 ° C. The melt viscosity (storage elastic modulus (G ′)) of the coating film at the maximum heating temperature was 0.01 MPa.
Further, in the same manner as in Example 1, an electrophotographic image receiving sheet was prepared, a color image was formed, and evaluation was performed. The results are shown in Table 1.
[0211]
(Comparative Example 2)
Example 1 except that the thermoplastic resin latex was changed to a thermoplastic resin latex (polyester resin latex, Tg = 48 ° C., number average molecular weight 7000) in “Preparation of thermoplastic resin latex-containing liquid” in Example 1. In the same manner as described above, the image forming material (support 6) (20 degree glossiness = 72 degrees, Cobb size water absorption (300 seconds) = 11.8 g / m) ² ) Was produced. The minimum film-forming temperature of the thermoplastic resin latex-containing liquid is 115 ° C., and the melt viscosity (storage elastic modulus (G ′)) (45 ° C.) of the coating film at the time of peeling is 1 MPa or more (4.1 MPa). there were.
Separately, when the surface temperature of the coating film when the coating film and the surface of the belt member were brought into contact with each other was measured, it was found that the coating film was heated to a maximum of 110 ° C. The melt viscosity (storage elastic modulus (G ′)) of the coating film at the maximum heating temperature was 0.12 MPa.
Further, an electrophotographic image-receiving sheet was prepared in the same manner as in Example 1, a color image was formed, and evaluation was performed. The results are shown in Table 1.
[0212]
[Table 1]

[0213]
【The invention's effect】
According to the present invention, the conventional problems are solved, and in particular, a method for producing an image forming material capable of efficiently producing an image forming material having excellent water resistance, surface smoothness, and good gloss, and Provided is an image forming material produced by the method for producing an image forming material, having excellent water resistance, surface smoothness, good gloss, and suitable for use as a sheet material, support, etc. in various fields. can do.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an example of a fixing belt type electrophotographic apparatus of the present invention.
FIG. 2 is a schematic explanatory view showing fixing processing by a belt post-processing machine (endless press) in the present invention.
FIG. 3 is a schematic diagram illustrating a fixing processing unit of the color image forming apparatus used in the embodiment.
[Explanation of symbols]
1 processing section
1 'fixing part
2 belts
2 'fixing belt
3 Heating roller
3 'heating roller
4 Pressure roller
4 'Pressure roller
5 Tension roller
5 'tension roller
6 Cleaning roller
6 'Cleaning roller
7 Cooling device
8 Transport roller
8 'Transport roller
10 Electrophotographic image-receiving sheet
10 'Electrophotographic image-receiving sheet
10a Image receiving layer
10a 'image receiving layer
12 Toner
13 Fixing belt
14 Heating roller
15 Pressure roller
16 Cooling device
17 Tension roller

Claims (21)

Forming a coating film by applying a thermoplastic resin latex-containing liquid containing at least a thermoplastic resin latex on a substrate, bringing the coating film into contact with the surface of the belt member, and then peeling the coating film from the belt member; A method for producing an image forming material, wherein the surface temperature of the belt member when contacting the coating film and the surface of the belt member is equal to or higher than the minimum film forming temperature in the thermoplastic resin latex-containing liquid, and The method for producing an image forming material, wherein the coating film has a melt viscosity (storage modulus (G ′)) of 0.1 MPa or more when peeled. The method for producing an image forming material according to claim 1, wherein the belt member is a belt in a cooling and peeling type belt processing machine. 3. The method for producing an image forming material according to claim 1, wherein the surface roughness (Oken smoothness) of the substrate is 210 seconds or more. The method for producing an image forming material according to claim 1, wherein the coating film has a melting temperature of 120 ° C. or higher. The production of an image forming material according to any one of claims 1 to 4, wherein the liquid containing the thermoplastic resin latex contains a compound that causes at least one of decomposition, evaporation, and sublimation at a temperature of 120 ° C or higher. Method. 6. The method for producing an image forming material according to claim 1, wherein pressure is applied when the coating film is brought into contact with the surface of the belt member. The method for producing an image forming material according to claim 1, wherein the surface temperature of the belt member when the coating film is brought into contact with the surface of the belt member is 80 to 200 ° C. 7. The method for producing an image forming material according to any one of claims 1 to 7, wherein the temperature of the coating film at the time of peeling is 0 to 100 ° C. The method for producing an image forming material according to claim 1, wherein the belt member has a surface roughness (arithmetic average roughness (Ra)) of 20 μm or less. The method for producing an image forming material according to claim 1, wherein the belt member is an endless belt. 11. The method for producing an image forming material according to claim 1, wherein a layer made of a fluorocarbon siloxane rubber having a uniform thickness is provided on the surface of the belt member. The image according to any one of claims 1 to 10, wherein the surface of the belt member has a layer made of silicone rubber having a uniform thickness, and a layer made of fluorocarbonsiloxane rubber is provided on the surface of the silicone rubber layer. Manufacturing method of forming material. The method for producing an image forming material according to claim 11 or 12, wherein the fluorocarbon siloxane rubber has a perfluoroalkyl ether group and / or a perfluoroalkyl group in a main chain. The method for producing an image forming material according to any one of claims 1 to 13, wherein a value of a contact angle of water representing wettability on the surface of the belt member is 50 ° or more. The method for producing an image forming material according to claim 1, wherein the substrate is paper. An image forming material produced by the method for producing an image forming material according to claim 1. The image forming material according to claim 16, wherein the surface glossiness is 45 or more at 20 ° glossiness. 18. The image forming material according to claim 16, wherein the water size absorbency is 20 g / m ² or less. The image forming material according to claim 16, which is used as a support. The image forming material according to claim 16, further comprising an image forming layer. 21. The image forming material according to claim 16, which is used in at least one of an electrophotographic material, a heat sensitive material, an ink jet image receiving material, a silver salt photographic material, an electronic paper, and a printing paper.

Images