JPH0582940B2 - - Google Patents

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Publication number
JPH0582940B2
JPH0582940B2 JP61038975A JP3897586A JPH0582940B2 JP H0582940 B2 JPH0582940 B2 JP H0582940B2 JP 61038975 A JP61038975 A JP 61038975A JP 3897586 A JP3897586 A JP 3897586A JP H0582940 B2 JPH0582940 B2 JP H0582940B2
Authority
JP
Japan
Prior art keywords
paper
coating
manufactured
less
parts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP61038975A
Other languages
Japanese (ja)
Other versions
JPS62198876A (en
Inventor
Hiroyoshi Hosomura
Katsumi Harada
Keiji Yamauchi
Hitoshi Kuramoto
Masao Oota
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP3897586A priority Critical patent/JPS62198876A/en
Priority to US07/018,473 priority patent/US4778711A/en
Publication of JPS62198876A publication Critical patent/JPS62198876A/en
Publication of JPH0582940B2 publication Critical patent/JPH0582940B2/ja
Granted legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • D21H25/12—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod
    • D21H25/14—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod the body being a casting drum, a heated roll or a calender
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H5/00—Special paper or cardboard not otherwise provided for
    • D21H5/0075—Anti-friction, anti-abrasive or release paper
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G7/00—Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
    • G03G7/0006—Cover layers for image-receiving members; Strippable coversheets
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
    • D21H11/04—Kraft or sulfate pulp
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/62—Rosin; Derivatives thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/66—Salts, e.g. alums
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/28—Colorants ; Pigments or opacifying agents
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/30—Luminescent or fluorescent substances, e.g. for optical bleaching

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Paper (AREA)

Description

【発明の詳細な説明】[Detailed description of the invention]

［産業上の利用分野］ 本発明は乾式電子写真用転写紙に関するもので
あり、特に写真印刷並の画質を再現するモノクロ
ームおよびカラー電子写真複写機において、高画
質コピーを得るのに好適な乾式電子写真用転写紙
に関するものである。 ［従来の技術］ 平板オフセツト印刷を主流とする精巧な印刷や
多色印刷においては、アート紙、コート紙等の塗
工紙が使用されている。これは塗工紙の表面が平
滑なために、印刷時にインキ皮膜との接触が良
く、画像が忠実に再現されること、画像の光沢が
高く、色再現が良いことなどによる。 塗布紙の電子写真適性については、塚谷等の検
討がある。仮等は、物理的には塗工紙は平滑で感
光体に一様に密着するので、理論的にはきれいな
トナー転写像が得られるはずであるとしている
が、実際に現存の装置に適用した場合には、画像
が荒れると述べている（塚谷、太田：ノンインパ
クトプリンタ用紙、紙パルプ技術タイムス、27、
No.４（1984）31−36）。事実、電子写真において印
刷用塗工紙は画質上の利点はなく、ほとんど使用
されていない。 本発明者らの検討では、平滑な印刷用塗工紙は
電子写真の画像定着においてブリスター（ふく
れ）を発生することが判明した。この問題はヒー
トロール方式、オーブン方式等定着方式によらず
発生することが確認された。これは印刷用塗工紙
の透気性が小さいために、紙中の水蒸気が加熱膨
脹する時に紙層が剥れることによるものである。 一方、電子写真の高画質化の方法について、塚
谷等は印刷プロセスとの比較で、トナーの小粒径
化、転写トナーの薄層化を示唆している（塚谷、
太田：ノンインパクトプリンタ用紙、紙パルプ技
術タイムス、27、No.３（1984）45−49）。これらの
技術面において、電子写真での印刷用塗工紙の問
題を解決できれば平滑な塗工紙の使用は画質上有
利と考えられる。また画像の光沢や色再現を重視
した定着においては、印刷と同様に電子写真でも
平滑な塗工紙の方が良いことが確認されている。 塗工紙に最も近い電子写真用転写紙として、磁
性一成分現像方式用の転写紙がある（特公昭58−
26026号、特公昭57−24716号、特公昭57−53592
号、特公昭57−55139号）。 この転写紙は磁性一成分現像剤では一般に電気
抵抗が低いことにより生じる転写時の像の乱れを
改善する目的で、原紙に高電気抵抗樹脂を主体と
する塗料を塗工したものであるが普通紙に似せる
ために塗工量が少なく、低平滑であり、前記の高
画質用途には不適である。また印刷用途工紙の塗
料に使用されているものと同じ顔料が、この転写
紙用の塗料にも配合されている。 しかし印刷用塗工紙の場合には、主に平滑化の
目的で顔料が多量に配合されるのに対し、普通紙
に似せるように配合されること、多量に配合する
と高電気抵抗樹脂の効果を低下させること等のた
め、塗料中の顔料配合量は印刷用塗布紙より大幅
に少ない。従つて、この転写紙の塗料の塗工量を
増加しただけでは、印刷用塗工紙並の平滑性は得
られず、また、紙間のブロツキング等の問題を生
じ、乾式電子写真用転写紙としては使用できな
い。 ［発明が解決しようとする問題点］ 本発明の目的は、前記した従来技術の欠点を改
善し、乾式電子写真における定着時のブリスター
発生がなく、高画質なコピーが得られる電子写真
転写用塗工紙を提供することにある。 ［問題点を解決するための手段］ 本発明は、 (1) 平均粒径が1.5μｍ以下の吸油度の大きな顔料
を接着剤中に含む塗料を原紙の両面に塗布し塗
工層を形成した後、平滑化処理を施し、前記塗
工層の表面の中心線平均粗さを2.0μｍ以下、か
つ透気度を4000秒以下に調整したことを特徴と
する乾式電子写真用転写紙、および (2) 前記吸油度の大きな顔料として、軽質炭酸カ
ルシウム、シリカ、焼成クレー、水酸化アルミ
ニウム、リトポン、酸化亜鉛、二酸化チタン、
硫酸バリウムおよび尿素樹脂の１種以上から選
択される顔料を用いることを特徴とする前記１
に記載の乾式電子写真用転写紙である。 印刷のカラー再現性に対する紙の影響について
は、J.A.C.YuIeが紙表面のグロスが高く、イン
ク吸収性が小さいほどインクの色の劣化がないこ
と、および非塗工紙に比較し、塗工紙の方がシヤ
ープな画像を得られることを述べている（J.A.C.
YuIe：Principles of Color Reproduction、
JOHN WILEY ＆ SONS、INC.、1967）。 本発明者らは電子写真用カラートナーの色の劣
化について、市販の印刷用塗工紙、上質紙および
試作塗工紙を用いて評価し、印刷と同様に塗工紙
の方が上質紙より色の劣化が少ないことを確認し
た。これらの紙についてグロスをGARDNER社
の光沢度計GARDNER GLOSSGARDを使用
して測定した。また中心線平均粗さを、株式会社
小板研究所製の万能表面形状測定機Surfcorder
SE−3Cを使用して、JISB0601の方法に従い、カ
ツトオフ値0.8mm、測定長さ８mmで測定し、第１
図に示すようなグロスと中心線平均粗さの関係を
得た。この結果からグロスについては色の劣化の
少ない塗工紙と上質紙の境界は10％であるが、こ
の付近にマツト仕上げの塗布紙と上質紙が存在し
両者が識別しにくいのに対し、中心線平均粗さで
は境界値2μｍを取ると両者を明確に区別し得る
ことが判明した。またカラートナーを十分発色さ
せるためには、トナーを定着時十分に溶融させる
必要があり、画像グロスが高くなるので、紙のグ
ロスが低すぎるとコピーの内のグロスムラが大き
くなり好ましくない。この点から紙表面の中心線
平均粗さはグロスが20％以上となる1.5μｍ以下が
望ましい。 本発明の乾式電子写真用転写紙は、原紙の両面
に、塗工層に透気性を与える顔料を主体とし、接
着剤を配合した塗料を塗工して表面を平滑し、透
気度が4000秒以下になるように調整して得られ
る。 塗料の主体である顔料は、塗工後スーパーカレ
ンダー等により塗工面を平滑化処理するため、平
均粒径が1.5μｍ以下、望ましくは1.0μｍ以下の微
粒子であり、塗工層に透気性を与えるものが望ま
しい。平均粒径が1.5μｍを越えると平滑化処理を
行つても十分な効果が得られなかつたり、透気性
が低下する傾向があるので望ましくない。 塗工層に透気性を与える顔料としては平均粒径
が小さく吸油度の大きい顔料が望ましく、例えば
軽質炭酸カルシウム、シリカ、焼成クレー、水酸
化アルミニウム、リトポン、酸化亜鉛、二酸化チ
タン、硫酸バリウム、尿素樹脂顔料等がある。 カオリンクレー、セリサイト、ジークライトは
平均粒径が小さく平滑化にも有効であるが、粒子
形態が板状であるため、透気性が低下する傾向が
あるので配合には注意する必要がある。 接着剤は顔料、原紙との接着力が強く、ブロツ
キング性が少い水溶性接着剤あるいはエマルジヨ
ン、ラテツクスを単独あるいは混合して使用する
ことができる。 例えば、ポリビニルアルコール、デンプン、メ
チルセルロース、ヒドロキシエチルセルロース、
スチレンアクリル樹脂、イソブチレン−無水マレ
イン酸樹脂、カルボキシメチルセルロース等の水
溶性樹脂やアクリルエマルジヨン、酢ビエマルジ
ヨン、塩化ビニリデンエマルジヨン、ポリエステ
ルエマルジヨン、スチレン−ブタジエンラテツク
ス、アクリルニトリルブタジエンラテツクスなど
がある。これらの接着剤の中でも重合度が低い樹
脂とか、最低造膜温度が０℃以上の比較的硬い樹
脂が望ましい。 またこの他、塗料には色調を調整するため染料
や有色顔料を添加したり、視感的白さを向上させ
るため、蛍光染料を添加することもできる。塗料
の調整を容易にするため、分散剤や消泡剤を添加
することもできる。 塗料中の顔料と接着剤の配合比は95／５〜60／
40が望ましいが、特に95／５〜70／30が望まし
い。顔料の配合比が95％を越えると塗膜強度が弱
くなり、画像光沢度が低下するだけでなく、製造
工程でもトラブルを起こす可能性がある。顔料の
配合比が60％未満の場合、平滑化仕上をしても十
分な中心線平均粗さ、白紙グロスを得ることがで
きない欠点がある。塗布量は片面当り５〜30ｇ／
m2が望ましい。塗布量が５ｇ／m2未満では目標と
する中心線平均粗さ、白紙グロスが得られず、30
ｇ／m2を越すと、ブリスターが発生するだけでな
く紙の腰が弱くなり、通紙性にトラブルを生じる
などの欠点がある。 塗工方法としては、一般の塗工方法、例えばブ
レード塗工、エアナイフ塗工、ロール塗工、バー
塗工などの塗工方式を使用することができる。 平滑化処理はスーパーカレンダーあるいはグロ
スカレンダーなど剛性ロールと弾性ロールのニツ
プ間を多数回通すことにより行うことができる。
平滑化処理は十分な画像光沢度を得るために
JISB0601による表面の中心線平均粗さが2.0μｍ
以下、望ましくは1.5μｍ以下となるように調整す
る必要がある。 この必要な中心線平均粗さを得るためには平滑
化処理工程だけでコントロールできるものではな
く、顔料の粒径、配合比、塗工量、塗布方法をも
考慮する必要がある。 原紙としては、酸性および中性の上質紙や中質
紙等が使用できるが、走行性、カール性等の電子
写真複写機適性を付与するために原料の配合、調
成、製造条件を公知の方法（特公昭55−47385号、
特公昭57−81270号）でコントロールした用紙が
好ましい。 ［実施例］ 以下実施例および比較例によつて本発明をさら
に具体的に説明する。以下の例中、部は重量部を
表わす。 実施例 １ 叩解度が530ccの広葉樹晒クラフトパルプ
（LBKP）100部、クレー10部、澱粉２部、ロジン
サイズ剤1.5部および硫酸バンド１部を添加して
抄紙した50ｇ／m2の上質紙の両面に軽質炭酸カル
シウム（ブリリアント15、平均粒径0.15μｍ、白
石工業社製）65部、カオリンクレー（ハイドログ
ロス90、ヒユーバー社製）20部、酢ビーアクリル
エマルジヨン（モビニール770、最低造膜温度11
℃、ヘキスト合成社製）10部、酸化澱粉（エース
Ａ、王子コーンスターチ社製）５部からなる塗料
を乾燥後の塗布量がフエルト面（Ｆ面）／ワイヤ
ー面（Ｗ面）＝12／12ｇ／m2となるようにエアナ
イフコーターで塗工した後スーパーカレンダーで
平滑化処理を行つて複写用紙を得た。 実施例 ２ 叩解度が530ccの広葉樹晒クラフトパルプ
（LBKP）100部、クレー10部、澱粉２部、ロジン
サイズ剤1.5部および硫酸バンド１部を添加して
抄紙した65ｇ／m2の上質紙の両面に湿式粉砕炭酸
カルシウム（カービタル90、平均粒径0.6μｍ、富
士カオリン社製）60部、シリカ粉末（サイロイド
244、平均粒径3.3μｍ、富士デビソン社製）20部、
アクリルエマルジヨン（モビニール9000、最低造
膜温度30℃、ヘキスト合成社製）18部および酸化
澱粉２部からなる塗料を乾燥後の塗布量が13／13
ｇ／m2となるようにエアナイフコーターで塗布し
た後スーパーカレンダーで平滑化処理を行つて複
写用紙を得た。 実施例 ３ 実施例２で使用した上質紙の両面に重質炭酸カ
ルシウム（NS−2500、平均粒径0.89μｍ、日東粉
化工業社製）20部、硫酸バリウム（＃100、平均
粒径0.6μｍ、堺化学工業社製）65部、スチレン−
ブタジエンラテツクス（LX−303、最低造膜温度
20℃、日本ゼオン社製）13部、およびポリビニル
アルコール（ポバール105、クラレ社製）２部か
らなる塗料を乾燥後の塗布量がＦ面／Ｗ面＝15／
15ｇ／m2となるようにエアナイフコーターで塗布
した後、スーパーカレンダーで平滑化処理を行な
つて複写用紙を得た。 実施例 ４ 実施例２で使用した上質紙の両面に重質炭酸カ
ルシウム（NS−2500、平均粒径0.89μｍ、日東粉
化工業社製）20部、硫酸バリウム（＃100、平均
粒径0.6μｍ、堺化学工業社製）65部、スチレン−
ブタジエンラテツクス（LX−303、最低造膜温度
20℃、日本ゼオン社製）13部、およびポリビニル
アルコール（ポバール105、クラレ社製）２部か
らなる塗料を乾燥後の塗布量がＦ面／Ｗ面＝15／
15ｇ／m2となるようにブレードコーターで塗布し
た後、スーパーカレンダーで平滑化処理を行なつ
て複写用紙を得た。 実施例 ５ 実施例２で使用した上質紙の両面に焼成クレー
（アンシレツクス93、平均粒径0.6μｍ、EMC社
製）60部、重質炭酸カルシウム（NS−1000、平
均粒径1.17μｍ、日東粉化工業社製）20部、スチ
レン−ブタジエンラテツクス（LX−303、日本ゼ
オン社製）15部およびポリビニルアルコール（ポ
バール117、クラレ社製）５部からなる塗料を乾
燥後の塗布量がＦ面／Ｗ面＝15／15ｇ／m2となる
ようにエアナイフコーターで塗布した後、スーパ
ーカレンダーで平滑化処理を行なつて複写用紙を
得た。 比較例 １ 実施例１で使用した上質紙の両面にカオリンク
レー（ウルトラホワイト90、EMC社製）87部、
スチレン−ブタジエンラテツクス（JSR0632、日
本合成ゴム社製）10部、および酸化澱粉（エース
Ａ、王子コーンスターチ社製）３部からなる塗料
を、乾燥後の塗布量がＦ面／Ｗ面＝15／15ｇ／m2
となるようにブレードコーターで塗布した後、ス
ーパーカレンダーで平滑化処理を行い複写用紙を
得た。 比較例 ２ 市販の印刷用塗工紙OK特アート（王子製紙社
製）84.9ｇ／m2。 比較例 ３ 市販の印刷用塗工紙ニユー金藤（神崎製紙社
製）84.9ｇ／m2。 比較例 ４ 市販の一成分磁性トナー現像方式の三田工業ミ
タDC−131複写機用のPPC用紙。 比較例 ５ 市販の富士ゼロツクス社製ゼロツクスＬ紙。実
施例１〜５および比較例１〜５にあげた用紙につ
いて、(1)坪量、(2)厚さ、(3)中心線平均粗さ、(4)表
面電気抵抗、(5)透気度、(6)静摩擦係数、(7)ハイラ
イトクロマ、(8)白紙グロス、(9)ソリツド像グロ
ス、(10)定着時ブリスターおよび(11)走行トラブル数
の各特性を下記の方法で測定し、評価、その結果
を表１および表２に示した。 (1) 坪量：JISP8124の方法により測定した。 (2) 厚さ：JISP8118の方法により測定した。 (3) 中心線平均粗さ：JISP8111の方法で試験片
を前処置し、JISB0601の方法によりＦ面につ
いて測定した。 使用測定器：株式会社小坂研究所製、万能表面
形状測定器 Surfcorder SE−3C カツトオフ値 0.8mm 測定長さ ８mm (4) 表面電気抵抗： 温度20℃±２℃、湿度85±２％JISP8111に
準じる方法で試験片を前処置し、各々前処置と
同じ条件で、JISC2122の表面抵抗率に準じる
方法によりＦ面について測定した。 使用測定器；株式会社川口電機製作所製、常温
測定箱 Ｐ−601 横河ヒユーレツトパツカ
ード社製 HIGH RESISTANCE METER
4329A 印加電圧；100V (5) 透気度：JISP8117の方法により測定した。 (6) 静摩擦係数： 実施例および比較例の用紙については平滑化
処理後、ギロチン断裁機で500枚ずつA4サイズ
に断裁し、その最上部の数十枚を除いた堆積状
態の連続約100枚を試験サンプルとした。 市販紙については開封して、上と同様に堆積
状態の連続約100枚を試験サンプルとした。 J.TAPPI No.30に準じる方法により、試験
サンプルをB4サイズ大の水平板の上に固定し、
試験サンプルの最上部一枚とおもりの底部を両
面接着テープで固定し、順次10枚目まで測定し
た。 使用測定器；東洋ボールドウイン社製、テンシ
ロンUTM−−100 (7) ハイライトクロマ： 富士ゼロツクス社製3890複写機でマゼンタ色
トナーを使用して175線５〜85％の網点階調画
像の未定着の転写像をＦ面に形成した。その後
シリコーンゴム被覆ロールから構成される両面
加熱定着器で画像を定着した。 各網点階調毎にJISZ8722の方法により分光
測色し、Ｘ、ｙ、Ｙを計算し、その値から
JISZ8721の方法により彩度Ｃを定めた。また
同じ網点の網点面積比を測定し、彩度Ｃと網点
面積比の関係式を最小二乗法で求めた。この関
係式により網点面積比0.4の時の彩度Ｃを計算
しハイライトクロマとした。 使用測定器；日立製作所社製、
Spectrophotometer H330 東洋インク社製、BEUVAC (8) 白紙グロス：JISP8142に準じる方法により
Ｆ面を測定した。 使用測定器；GARDNER社製、GARDNER
GLOSSGARD (9) ソリツド画像グロス： ハイライトクロマと同様の方法により、Ｆ面
にマゼンタ色のソリツド画像を得た。このソリ
ツド画像のグロスを白紙グロスと同様の方法に
より測定した。 (10) 定着時ブリスター： ハイライトクロマと同様の方法により、加熱
定着器のシリゴム被覆ロールの温度を180℃と
200℃の条件でマゼンタ色の網点階調画像を形
成した。この定着像について目視によりブリス
ターを評価した。 なお、試験用紙は温度20±２℃、湿度85±２
％でJISP8111に準じる方法で前処置した。 表中の記号の意味は下記の通りである。 ○；ブリスターが認められない。 △；紙の表面の1/10以下の部分にだけブリスタ
ーが認められる。 ×；紙の面積の1/10以上の部分にブリスターが
認められる。 (11) 走行トラブル数： 静摩擦係数と同様の方法で採取した堆積状態
の用紙を500枚ずつ、富士ゼロツクス社製5870
複写機の給紙トレイにセツトし、各用紙1000枚
（但し、比較例１、２、３については100枚）コ
ピーを取り、紙詰り、重送等のトラブルの合計
回数を走行トラブル数とした。 [Industrial Application Field] The present invention relates to a dry type electrophotographic transfer paper, which is particularly suitable for obtaining high-quality copies in monochrome and color electrophotographic copying machines that reproduce image quality comparable to photographic printing. This relates to photographic transfer paper. [Prior Art] Coated papers such as art paper and coated paper are used in elaborate printing and multicolor printing in which planar offset printing is the mainstream. This is because the coated paper has a smooth surface, which allows for good contact with the ink film during printing, resulting in faithful reproduction of images, high gloss, and good color reproduction. Regarding the suitability of coated paper for electrophotography, there is a study by Tsukatani et al. Kari et al. states that physically, coated paper is smooth and adheres uniformly to the photoreceptor, so theoretically it should be possible to obtain a clean toner transfer image, but this method has not actually been applied to existing equipment. (Tsukatani, Ota: Non-impact printer paper, Paper and Pulp Technology Times, 27,
No. 4 (1984) 31-36). In fact, coated paper for printing has no advantage in image quality in electrophotography and is hardly used. Studies conducted by the present inventors have revealed that smooth coated printing paper causes blistering during electrophotographic image fixation. It has been confirmed that this problem occurs regardless of the fixing method, such as the heat roll method or the oven method. This is because the coated paper for printing has low air permeability, so when the water vapor in the paper is heated and expanded, the paper layer peels off. On the other hand, regarding methods for improving the image quality of electrophotography, Tsukatani et al. suggest reducing the toner particle size and thinning the transferred toner layer in comparison with the printing process (Tsukatani et al.
Ota: Non-impact printer paper, Paper and Pulp Technology Times, 27, No. 3 (1984) 45-49). In these technical aspects, if the problems of coated paper for printing in electrophotography can be solved, the use of smooth coated paper is considered to be advantageous in terms of image quality. Furthermore, it has been confirmed that smooth coated paper is better for electrophotography as well as for printing when fixing images with emphasis on gloss and color reproduction. Transfer paper for electrophotography that is closest to coated paper is transfer paper for magnetic one-component development (Special Publication Paper published in 1983-
No. 26026, Special Publication No. 57-24716, Special Publication No. 57-53592
No., Special Publication No. 57-55139). This transfer paper is made by coating a base paper with a paint mainly consisting of a high electrical resistance resin in order to improve the image disturbance during transfer that occurs due to the low electrical resistance of magnetic one-component developers. In order to resemble paper, the amount of coating is small and the surface is low and smooth, making it unsuitable for the above-mentioned high image quality applications. The same pigments used in the paint for printing paper are also included in the paint for transfer paper. However, in the case of coated paper for printing, large amounts of pigment are blended mainly for the purpose of smoothing, whereas pigments are blended to resemble plain paper, and when blended in large amounts, the effect of high electrical resistance resin The amount of pigment blended in the paint is significantly lower than that of coated paper for printing, in order to reduce the Therefore, simply increasing the coating amount of paint on this transfer paper does not provide the same level of smoothness as coated paper for printing, and also causes problems such as blocking between the sheets, making it difficult to use transfer paper for dry electrophotography. It cannot be used as [Problems to be Solved by the Invention] An object of the present invention is to improve the above-mentioned drawbacks of the prior art, and to provide a coating for electrophotographic transfer that does not generate blisters during fixing in dry electrophotography and provides high-quality copies. Our goal is to provide paper. [Means for Solving the Problems] The present invention provides: (1) A paint containing a highly oil-absorbing pigment with an average particle size of 1.5 μm or less is applied to both sides of base paper to form a coating layer. A dry electrophotographic transfer paper characterized in that the coating layer is then subjected to a smoothing treatment to adjust the center line average roughness of the surface of the coating layer to 2.0 μm or less and the air permeability to 4000 seconds or less, and ( 2) The pigments with high oil absorption include light calcium carbonate, silica, calcined clay, aluminum hydroxide, lithopone, zinc oxide, titanium dioxide,
1 above, characterized in that a pigment selected from one or more of barium sulfate and urea resin is used.
This is a dry electrophotographic transfer paper described in . Regarding the influence of paper on the color reproducibility of printing, JACYuIe shows that the higher the gloss on the paper surface and the lower the ink absorption, the less the ink color will deteriorate, and that coated paper is better than non-coated paper. states that sharp images can be obtained (JAC
YuIe: Principles of Color Reproduction,
JOHN WILEY & SONS, INC., 1967). The present inventors evaluated the color deterioration of color toner for electrophotography using commercially available coated printing paper, high-quality paper, and prototype coated paper.As with printing, coated paper was superior to high-quality paper. It was confirmed that there was little color deterioration. The gloss was measured on these papers using a GARDNER GLOSSGARD gloss meter. In addition, the center line average roughness was measured using Surfcorder, a versatile surface profile measuring machine manufactured by Koita Institute Co., Ltd.
Using SE-3C, measure with a cutoff value of 0.8 mm and a measurement length of 8 mm according to the method of JISB0601.
The relationship between gloss and center line average roughness as shown in the figure was obtained. From this result, regarding gloss, the boundary between coated paper and wood-free paper with little color deterioration is 10%. It was found that the line average roughness can be clearly distinguished between the two by taking a boundary value of 2 μm. Furthermore, in order to develop color toner sufficiently, it is necessary to melt the toner sufficiently during fixing, which increases the image gloss. Therefore, if the gloss of the paper is too low, gloss unevenness in the copy will increase, which is undesirable. From this point of view, it is desirable that the center line average roughness of the paper surface is 1.5 μm or less so that the gloss is 20% or more. The dry type electrophotographic transfer paper of the present invention has an air permeability of 4000 by coating both sides of the base paper with a paint containing a pigment as a main ingredient and an adhesive to provide air permeability to the coating layer, and smoothing the surface. Obtained by adjusting it to be less than a second. The pigment, which is the main component of the paint, is a fine particle with an average particle size of 1.5 μm or less, preferably 1.0 μm or less, and provides air permeability to the coated layer because the coated surface is smoothed using a super calender etc. after coating. Something is desirable. If the average particle size exceeds 1.5 μm, it is not desirable because a sufficient effect may not be obtained even with smoothing treatment, and air permeability tends to decrease. Pigments that provide air permeability to the coating layer are preferably pigments with a small average particle size and high oil absorption, such as light calcium carbonate, silica, calcined clay, aluminum hydroxide, lithopone, zinc oxide, titanium dioxide, barium sulfate, and urea. There are resin pigments, etc. Kaolin clay, sericite, and ziecrite have small average particle diameters and are effective for smoothing, but since the particle form is plate-like, air permeability tends to decrease, so care must be taken when blending. As the adhesive, water-soluble adhesives, emulsions, and latexes, which have strong adhesion to pigments and base paper and have low blocking properties, can be used alone or in combination. For example, polyvinyl alcohol, starch, methylcellulose, hydroxyethylcellulose,
Examples include water-soluble resins such as styrene acrylic resin, isobutylene-maleic anhydride resin, and carboxymethyl cellulose, acrylic emulsion, acetic acid vinyl emulsion, vinylidene chloride emulsion, polyester emulsion, styrene-butadiene latex, and acrylonitrile butadiene latex. Among these adhesives, resins with a low degree of polymerization and relatively hard resins with a minimum film forming temperature of 0° C. or higher are desirable. In addition, dyes and colored pigments can be added to the paint to adjust the color tone, and fluorescent dyes can be added to improve the visual whiteness. Dispersants and antifoaming agents can also be added to facilitate the adjustment of the paint. The blending ratio of pigment and adhesive in the paint is 95/5 to 60/
40 is desirable, and 95/5 to 70/30 is especially desirable. If the blending ratio of pigments exceeds 95%, the strength of the coating film will be weakened, which will not only reduce the glossiness of the image but also cause problems in the manufacturing process. If the blending ratio of the pigment is less than 60%, there is a drawback that sufficient center line average roughness and white paper gloss cannot be obtained even if a smooth finish is applied. Coating amount is 5-30g per side.
m 2 is desirable. If the coating amount is less than 5 g/ m2 , the target center line average roughness and white paper gloss cannot be obtained;
If it exceeds g/m 2 , there are disadvantages such as not only blistering occurs but also the stiffness of the paper becomes weak, causing problems in paper passing. As the coating method, general coating methods such as blade coating, air knife coating, roll coating, bar coating, etc. can be used. The smoothing treatment can be carried out by passing the material many times between the nip of a rigid roll and an elastic roll, such as a super calender or a gloss calender.
Smoothing process is used to obtain sufficient image glossiness.
Surface center line average roughness according to JISB0601 is 2.0μm
Hereinafter, it is necessary to adjust the thickness to preferably 1.5 μm or less. In order to obtain the required center line average roughness, it is not possible to control it only by the smoothing process, but it is also necessary to consider the pigment particle size, blending ratio, coating amount, and coating method. As the base paper, acidic or neutral high-quality paper or medium-quality paper can be used. However, in order to provide suitability for electrophotographic copying machines such as runnability and curling properties, the blending, preparation, and manufacturing conditions of the raw materials must be adjusted according to known methods. Method (Special Publication No. 55-47385,
Paper controlled by Japanese Patent Publication No. 57-81270) is preferable. [Examples] The present invention will be explained in more detail below using Examples and Comparative Examples. In the following examples, parts represent parts by weight. Example 1 A 50 g/m2 high-quality paper was made by adding 100 parts of hardwood bleached kraft pulp (LBKP) with a beating degree of 530 cc, 10 parts of clay, 2 parts of starch, 1.5 parts of rosin sizing agent, and 1 part of sulfuric acid. Both sides were coated with 65 parts of light calcium carbonate (Brilliant 15, average particle size 0.15 μm, manufactured by Shiraishi Kogyo Co., Ltd.), 20 parts of kaolin clay (Hydro Gloss 90, manufactured by Hyper Co., Ltd.), and a vinegar-bee acrylic emulsion (Movinyl 770, minimum film forming temperature). 11
℃, manufactured by Hoechst Synthetic Co., Ltd.) and 5 parts of oxidized starch (Ace A, manufactured by Oji Cornstarch Co., Ltd.), the coating amount after drying is felt side (F side) / wire side (W side) = 12 / 12 g /m 2 using an air knife coater and smoothing using a super calendar to obtain copy paper. Example 2 A 65 g/m2 high-quality paper was made by adding 100 parts of hardwood bleached kraft pulp (LBKP) with a beating degree of 530 cc, 10 parts of clay, 2 parts of starch, 1.5 parts of rosin sizing agent, and 1 part of sulfuric acid. Both sides were coated with 60 parts of wet-ground calcium carbonate (Carbital 90, average particle size 0.6 μm, manufactured by Fuji Kaolin Co., Ltd.) and silica powder (Syroid).
244, average particle size 3.3 μm, manufactured by Fuji Davison) 20 parts,
The coating amount after drying of a paint consisting of 18 parts of acrylic emulsion (Movinyl 9000, minimum film forming temperature 30℃, manufactured by Hoechst Synthesis) and 2 parts of oxidized starch was 13/13.
After coating with an air knife coater to give a coating weight of g/m 2 , a copying paper was obtained by smoothing with a super calender. Example 3 20 parts of heavy calcium carbonate (NS-2500, average particle size 0.89 μm, manufactured by Nitto Funka Kogyo Co., Ltd.) and barium sulfate (#100, average particle size 0.6 μm) were applied to both sides of the high-quality paper used in Example 2. , manufactured by Sakai Chemical Industry Co., Ltd.) 65 parts, styrene
Butadiene latex (LX-303, minimum film forming temperature
After drying a paint consisting of 13 parts of polyvinyl alcohol (Poval 105, manufactured by Kuraray Co., Ltd.) and 2 parts of polyvinyl alcohol (Poval 105, manufactured by Kuraray Co., Ltd.) at 20°C, the amount applied to the F side/W side = 15/
After coating with an air knife coater to give a coating density of 15 g/m 2 , smoothing treatment was performed using a super calender to obtain copy paper. Example 4 20 parts of heavy calcium carbonate (NS-2500, average particle size 0.89 μm, manufactured by Nitto Funka Kogyo Co., Ltd.) and barium sulfate (#100, average particle size 0.6 μm) were applied to both sides of the high-quality paper used in Example 2. , manufactured by Sakai Chemical Industry Co., Ltd.) 65 parts, styrene
Butadiene latex (LX-303, minimum film forming temperature
After drying a paint consisting of 13 parts of polyvinyl alcohol (Poval 105, manufactured by Kuraray Co., Ltd.) and 2 parts of polyvinyl alcohol (Poval 105, manufactured by Kuraray Co., Ltd.) at 20°C, the amount applied to the F side/W side = 15/
After coating with a blade coater to a weight of 15 g/m 2 , smoothing treatment was performed with a super calendar to obtain copy paper. Example 5 60 parts of calcined clay (Ancilex 93, average particle size 0.6 μm, manufactured by EMC) and ground calcium carbonate (NS-1000, average particle size 1.17 μm, Nitto powder) were applied to both sides of the high-quality paper used in Example 2. The coating amount after drying of the paint consisting of 20 parts (manufactured by Kakogyo Co., Ltd.), 15 parts of styrene-butadiene latex (LX-303, manufactured by Nippon Zeon Co., Ltd.) and 5 parts of polyvinyl alcohol (Poval 117, manufactured by Kuraray Co., Ltd.) is as follows: /W surface = 15/15 g/m 2 after coating with an air knife coater and smoothing with a super calendar to obtain copy paper. Comparative Example 1 87 parts of kaolin clay (Ultra White 90, manufactured by EMC) was applied to both sides of the high-quality paper used in Example 1.
A paint consisting of 10 parts of styrene-butadiene latex (JSR0632, manufactured by Japan Synthetic Rubber Co., Ltd.) and 3 parts of oxidized starch (Ace A, manufactured by Oji Cornstarch Co., Ltd.) was applied in an amount after drying of F side/W side = 15/ 15g/ m2
After coating with a blade coater so as to give the following, smoothing treatment was performed with a super calendar to obtain copy paper. Comparative Example 2 Commercially available coated printing paper OK special art (manufactured by Oji Paper Co., Ltd.) 84.9 g/m 2 . Comparative Example 3 Commercially available coated printing paper New Kinfuji (manufactured by Kanzaki Paper Co., Ltd.) 84.9 g/m 2 . Comparative Example 4 PPC paper for the Sanda Kogyo Mita DC-131 copying machine that uses a commercially available one-component magnetic toner development method. Comparative Example 5 Commercially available Xerox L paper manufactured by Fuji Xerox Co., Ltd. Regarding the papers listed in Examples 1 to 5 and Comparative Examples 1 to 5, (1) basis weight, (2) thickness, (3) center line average roughness, (4) surface electrical resistance, and (5) air permeability. Measure the following characteristics using the following methods: The evaluation results are shown in Tables 1 and 2. (1) Basis weight: Measured according to the method of JISP8124. (2) Thickness: Measured according to the method of JISP8118. (3) Centerline average roughness: A test piece was pretreated according to the method of JISP8111, and the F side was measured according to the method of JIS B0601. Measuring instrument used: Manufactured by Kosaka Laboratory Co., Ltd., all-purpose surface shape measuring instrument Surfcorder SE-3C Cut-off value 0.8 mm Measurement length 8 mm (4) Surface electrical resistance: Temperature 20°C ± 2°C, humidity 85 ± 2% According to JISP8111 A test piece was pretreated according to the method, and the F side was measured under the same conditions as the pretreatment method using a method according to the surface resistivity of JISC2122. Measuring equipment used: Room temperature measurement box P-601 manufactured by Kawaguchi Electric Seisakusho Co., Ltd. HIGH RESISTANCE METER manufactured by Yokogawa Heuretsu Card Company
4329A Applied voltage: 100V (5) Air permeability: Measured according to the method of JISP8117. (6) Static friction coefficient: After smoothing the papers of Examples and Comparative Examples, 500 sheets were cut into A4 size sheets using a guillotine cutting machine, and approximately 100 consecutive sheets were stacked, excluding the top few dozen sheets. was used as the test sample. Regarding commercially available paper, the package was opened and about 100 consecutive sheets in the same stacked state as above were used as test samples. The test sample was fixed on a B4 size horizontal plate by a method according to J.TAPPI No.30,
The topmost test sample and the bottom of the weight were fixed with double-sided adhesive tape, and measurements were taken in sequence up to the 10th sample. Measuring instrument used: Toyo Baldwin Co., Ltd., Tensilon UTM-100 (7) Highlight chroma: Fuji Xerox Co., Ltd. 3890 copier uses magenta toner to measure 175 lines of 5-85% halftone image. An unfixed transfer image was formed on the F side. Thereafter, the image was fixed using a double-sided heat fixing device consisting of a silicone rubber coated roll. Spectral colorimetry is performed using the JISZ8722 method for each halftone gradation, X, y, and Y are calculated, and from the values
Saturation C was determined by the method of JISZ8721. Further, the halftone dot area ratio of the same halftone dot was measured, and the relational expression between the saturation C and the halftone dot area ratio was determined by the least squares method. Using this relational expression, the saturation C when the dot area ratio is 0.4 was calculated and used as a highlight chroma. Measuring instrument used: Manufactured by Hitachi, Ltd.
Spectrophotometer H330 manufactured by Toyo Ink Co., Ltd., BEUVAC (8) White paper gloss: F side was measured by a method according to JISP8142. Measuring instrument used: Manufactured by GARDNER, GARDNER
GLOSSGARD (9) Solid image gloss: A magenta solid image was obtained on the F side using the same method as the highlight chroma. The gloss of this solid image was measured in the same manner as the white paper gloss. (10) Blistering during fixing: Using the same method as Highlight Chroma, the temperature of the silicone rubber coated roll of the heating fuser is set to 180℃.
A magenta halftone image was formed at 200°C. This fixed image was visually evaluated for blisters. The temperature of the test paper is 20±2℃ and the humidity is 85±2.
% was pretreated in accordance with JISP8111. The meanings of the symbols in the table are as follows. ○: No blisters observed. △: Blisters are observed only on less than 1/10 of the surface of the paper. ×: Blisters are observed in an area of 1/10 or more of the paper area. (11) Number of running troubles: 500 sheets of accumulated paper collected using the same method as the static friction coefficient were collected using Fuji Xerox 5870.
The paper was placed in the paper feed tray of the copying machine, 1000 copies of each paper (100 copies for Comparative Examples 1, 2, and 3) were made, and the total number of troubles such as paper jams and double feeding was counted as the number of running troubles. .

【表】【table】

【表】 表１および表２の結果から定着時のブリスター
が紙の面積の1/10以上発生しないためには透気度
は4000秒以下、望ましくは2900秒以下にする必要
があることが明らかである。 また実施例５のように透気度が490秒と低くな
ると塗膜強度の低下によるソリツド画像グロスの
低下が認められるので、これを防ぐためには透気
度を600秒以上にするのが望ましい。 また評価した紙送りシステムではトラブル数は
1000枚で５回以下が望ましい。 ［発明の効果］ 本発明は、平均粒径が1.5μm以下の吸油度の大
きな顔料を接着剤中に含む塗料を原子の両面に塗
布し塗工層を形成した後、平滑化処理を施し、前
記塗工層の表面の中心線平均粗さを2.0μm以下、
かつ透気度を4000秒以下に調整したことを特徴と
する乾式電子写真用転写紙を提供したものであ
り、定着時にブリスターを発生せず、高画質のコ
ピーが得られるという特長を有する。[Table] From the results in Tables 1 and 2, it is clear that the air permeability needs to be 4000 seconds or less, preferably 2900 seconds or less, in order to prevent blisters from occurring during fixing that are more than 1/10 of the paper area. It is. Further, when the air permeability is as low as 490 seconds as in Example 5, a decrease in solid image gloss is observed due to a decrease in coating film strength, so in order to prevent this, it is desirable to set the air permeability to 600 seconds or more. In addition, the number of problems with the paper feeding system evaluated was
It is desirable to do this 5 times or less for 1000 sheets. [Effects of the Invention] The present invention applies a paint containing a highly oil-absorbing pigment with an average particle size of 1.5 μm or less to both sides of the atom to form a coating layer, and then performs a smoothing treatment. The center line average roughness of the surface of the coating layer is 2.0 μm or less,
The present invention provides a transfer paper for dry electrophotography, which has an air permeability adjusted to 4000 seconds or less, and has the feature that it does not generate blisters during fixing and can produce high-quality copies.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は各種用紙のグロスと中心線平均粗さと
の関係を示すグラフである。 FIG. 1 is a graph showing the relationship between the gloss and center line average roughness of various types of paper.

Claims (1)

【特許請求の範囲】 １ 平均粒径が1.5μｍ以下の吸油度の大きな顔料
を接着剤中に含む塗料を原紙の両面に塗布し塗工
層を形成した後、平滑化処理を施し、前記塗工層
の表面の中心線平均粗さを2.0μｍ以下、かつ透気
度を4000秒以下に調整したことを特徴とする乾式
電子写真用転写紙。 ２ 前記吸油度の大きな顔料として、軽質炭酸カ
ルシウム、シリカ、焼成クレー、水酸化アルミニ
ウム、リトポン、酸化亜鉛、二酸化チタン、硫酸
バリウムおよび尿素樹脂の１種以上から選択され
る顔料を用いることを特徴とする特許請求の範囲
第１項に記載の乾式電子写真用転写紙。[Scope of Claims] 1. A paint containing a highly oil-absorbing pigment with an average particle size of 1.5 μm or less in an adhesive is applied to both sides of a base paper to form a coating layer, and then a smoothing treatment is applied to the coating. A transfer paper for dry electrophotography, characterized in that the center line average roughness of the surface of the layer is adjusted to 2.0 μm or less, and the air permeability is adjusted to 4000 seconds or less. 2. As the pigment with high oil absorption, a pigment selected from one or more of light calcium carbonate, silica, calcined clay, aluminum hydroxide, lithopone, zinc oxide, titanium dioxide, barium sulfate, and urea resin is used. A dry electrophotographic transfer paper according to claim 1.
JP3897586A 1986-02-26 1986-02-26 Electrophotographic transfer paper Granted JPS62198876A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP3897586A JPS62198876A (en) 1986-02-26 1986-02-26 Electrophotographic transfer paper
US07/018,473 US4778711A (en) 1986-02-26 1987-02-25 Paper for receiving toner images in electrophotography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3897586A JPS62198876A (en) 1986-02-26 1986-02-26 Electrophotographic transfer paper

Publications (2)

Publication Number Publication Date
JPS62198876A JPS62198876A (en) 1987-09-02
JPH0582940B2 true JPH0582940B2 (en) 1993-11-24

Family

ID=12540153

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3897586A Granted JPS62198876A (en) 1986-02-26 1986-02-26 Electrophotographic transfer paper

Country Status (1)

Country Link
JP (1) JPS62198876A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6810228B2 (en) 2001-09-18 2004-10-26 Fuji Xerox Co., Ltd. Image forming apparatus and fixing apparatus
JP2009216820A (en) * 2008-03-07 2009-09-24 Fuji Xerox Co Ltd Electrophotographic coated paper

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US5137773A (en) * 1990-03-02 1992-08-11 Xerox Corporation Transparencies
JP2745431B2 (en) * 1990-03-05 1998-04-28 日本製紙株式会社 Transfer paper for electrophotography
US5662995A (en) * 1994-07-04 1997-09-02 Fuji Xerox Co., Ltd. Transfer paper for electrophotography and process for producing the same
JP3816121B2 (en) * 1994-12-20 2006-08-30 富士ゼロックス株式会社 Electrophotographic transfer paper and color image forming method
JP4000221B2 (en) 1998-08-17 2007-10-31 富士ゼロックス株式会社 Electrophotographic transfer paper
JP2002162771A (en) * 2000-09-14 2002-06-07 Fuji Photo Film Co Ltd Electrophotographic image receiving material
JP2005195677A (en) * 2003-12-26 2005-07-21 Fuji Xerox Co Ltd Electrophotographic coated paper and image forming method
JP5253824B2 (en) 2008-01-11 2013-07-31 ヤマハ発動機株式会社 Linear motor, component mounting device and component inspection device
CN109320133A (en) * 2018-10-23 2019-02-12 含山县领创新材料科技有限公司 A kind of calcite base environment protecting paper

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5516045A (en) * 1978-07-21 1980-02-04 Japan Synthetic Rubber Co Ltd Latex composition
JPS5687050A (en) * 1979-12-18 1981-07-15 Fuji Xerox Co Ltd Transparent paper for electrostatic copy and its manufacture
JPS5734561A (en) * 1980-08-08 1982-02-24 Kanzaki Paper Mfg Co Ltd Transfer paper for wet electrophotography
JPS5850543A (en) * 1981-09-21 1983-03-25 Kanzaki Paper Mfg Co Ltd Transfer paper for wet electrophotography
JPS58203450A (en) * 1982-05-24 1983-11-26 Oji Paper Co Ltd Transfer paper for pressure fixing
JPS59101653A (en) * 1982-12-03 1984-06-12 Ricoh Co Ltd Electrophotographic transfer paper
JPS59212846A (en) * 1983-05-18 1984-12-01 Hitachi Ltd Electrophotographic transfer paper
JPS59224849A (en) * 1983-06-03 1984-12-17 Fuji Photo Film Co Ltd Transfer paper for encapsulated toner
JPS59228656A (en) * 1983-06-10 1984-12-22 Fuji Xerox Co Ltd Transfer paper for electrophotography

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5516045A (en) * 1978-07-21 1980-02-04 Japan Synthetic Rubber Co Ltd Latex composition
JPS5687050A (en) * 1979-12-18 1981-07-15 Fuji Xerox Co Ltd Transparent paper for electrostatic copy and its manufacture
JPS5734561A (en) * 1980-08-08 1982-02-24 Kanzaki Paper Mfg Co Ltd Transfer paper for wet electrophotography
JPS5850543A (en) * 1981-09-21 1983-03-25 Kanzaki Paper Mfg Co Ltd Transfer paper for wet electrophotography
JPS58203450A (en) * 1982-05-24 1983-11-26 Oji Paper Co Ltd Transfer paper for pressure fixing
JPS59101653A (en) * 1982-12-03 1984-06-12 Ricoh Co Ltd Electrophotographic transfer paper
JPS59212846A (en) * 1983-05-18 1984-12-01 Hitachi Ltd Electrophotographic transfer paper
JPS59224849A (en) * 1983-06-03 1984-12-17 Fuji Photo Film Co Ltd Transfer paper for encapsulated toner
JPS59228656A (en) * 1983-06-10 1984-12-22 Fuji Xerox Co Ltd Transfer paper for electrophotography

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6810228B2 (en) 2001-09-18 2004-10-26 Fuji Xerox Co., Ltd. Image forming apparatus and fixing apparatus
JP2009216820A (en) * 2008-03-07 2009-09-24 Fuji Xerox Co Ltd Electrophotographic coated paper

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