JP4183211B2 - Media transport belt - Google Patents

Description

（式中、ｍ，ｎはポリマー鎖の各反復単位モル分率に等しく、ｍは約０．１〜約０．９の範囲であり、ｎは約０．９〜約０．１の範囲である。但し、ｍとｎとの比は約０．０１〜約９．０である。Ａ，Ｂはいずれも４価の有機基であり、Ｘ，Ｙは２価の有機基を示す。）で表される構造が主成分であるものが好ましい。さらに、酸二無水物として、熱可塑性を付与するモノマーである一般式（１）中のＡが一般式（２）化２
【００１６】
【化２】

（式中、Ｒ₁，Ｒ₂は２価の有機基を示す。）で表される４価の有機基の群から選択される少なくとも１種であることが好ましい。さらに、前記一般式（１）中のＢが化３
【００１７】
【化３】

（式中、Ｒ₁，Ｒ₂は２価の有機基を示す。）で表される４価の有機基の群から選択される少なくとも１種であることが好ましい。さらに、ジアミンとして、前記一般式（１）中のＸ，Ｙが熱可塑性を付与するモノマーである一般式（３）化４
【００１８】
【化４】

（式中、Ｒ₁は２価の有機基を示す。）、及び化５
【００１９】
【化５】

で表される２価の有機基の群から選択される少なくとも１種であることが好ましい。
【００２０】
ここで、本発明の耐熱性樹脂ベルトに適用し得る熱可塑性ポリイミドの製造方法の一例を示す。熱可塑性ポリイミドは、まず、上記一般式（２）に示す分子鎖中にエステル基を有する酸二無水物（好適には１０〜９０モル％）及び上記化３に示す芳香族酸二無水物（好適にはピロメリット酸二無水物）から成る酸二無水物と、上記一般式（３）化１２及び化１３に示すジアミンとを有機溶媒中にて反応させ、ポリイミドの前駆体溶液であるポリアミド酸溶液を得る。そして、さらに加熱乾燥させてイミド化させることにより、ポリイミドが得られる。この実施形態は例示であって、これに限定されるものではないのは言うまでもない。
【００２１】
媒体搬送ベルトに用いられる熱可塑性ポリイミド樹脂は上述の構造式のものに限定されるものではないが、好ましいものである。熱可塑性フィルムとして、たとえば熱可塑性ポリイミドのみから成るフィルムを用いてもよいが、熱可塑性ポリイミドに添加物を混合したものから成るフィルムを用いてもよい。
【００２２】
また、本発明の媒体搬送ベルトに用いられる非熱可塑性（熱硬化性）ポリイミドフィルムとしては、一般式（２）化６
【００２３】
【化６】

（但し、Ｒ₁は化７
【００２４】
【化７】

で表される４価の有機基であり、Ｒ₂は水素原子又は１価の置換基であり、ｍ，ｎは整数であり、ｍ／ｎ＝０．１〜１００の値をとる。）で表される構造式の樹脂から成るフィルムを用いることができるが、これは一例である。
【００２５】
非熱可塑性ポリイミドフィルムの中には熱硬化性ポリイミド樹脂あるいは反応硬化型ポリイミド樹脂などとして表される樹脂を全て含むものである。非熱可塑性ポリイミドフィルムとして、たとえば非熱可塑性ポリイミド樹脂のみから成るフィルムを用いてもよいが、非熱可塑性ポリイミドフィルムに添加物を混合したものから成るフィルムを用いてもよい。非熱可塑性ポリイミドフィルムに添加物を混合するには、その前駆体に添加物が混合される。
【００２６】
本発明の媒体搬送ベルトにおいて管状物１２の表面に所定の電極パターン１４が形成されていて、電極パターン１４には交互にその端部が延び出され、電圧を印加し得るように構成されている。電極パターン１４は、銀，銅，アルミニウム，カーボンなどから成る導電性ペーストを管状物１２の表面にスクリーン印刷したり、アルミニウムや銅などの金属箔や金属薄膜を管状物１２の表面に被着させた後、エッチングすることにより、所定の電極パターン１４に形成したり、あるいは所定の電極パターン１４が形成されたマスクを介してアルミニウムなどの金属を蒸着させることにより、所定の電極パターン１４に形成したりして構成される。電極パターン１４は図示した形状に限定されるものではなく、たとえば櫛歯状に形成するとともに、その櫛歯と櫛歯が噛み合ったパターンとすることができる。また、電極パターン１４の厚みは電極パターンによる表面の凹凸を考慮すると、２〜３０μｍ、好ましくは５〜２０μｍがよい。さらに、電極パターン１４の線幅やピッチは任意であり、種々設定することが可能である。
【００２７】
本発明の媒体搬送ベルトにおいて電極パターン１４が形成された管状物１２の外周表面上には、電極パターン１４に印加することにより静電気を生じさせて電極保護層１６の面上に紙を吸着させる場合、体積抵抗値が１０⁹〜１０¹⁵Ω・ｃｍであり且つ誘電率が３．０〜５０．０である電極保護層１６が形成されている。特に、その電極保護層１６の体積抵抗値は１０⁹〜１０¹⁵Ω・ｃｍであり、好ましくは１０¹⁰〜１０¹⁴Ω・ｃｍがよく、且つ誘電率は３．０〜３０．０であり、好ましくは５．０〜２０．０がよい。体積抵抗値が１０⁹Ω・ｃｍを下回った場合は、隣り合う電極パターン１４間の絶縁性が不足し、リーク電流が流れてしまうので好ましくない。また、体積抵抗値が１０¹⁵Ω・ｃｍを上回った場合は、電極パターン１４に印加する電圧を取り去った後でも、残留電荷が長く残り、紙を吸着したままとなり好ましくない。一方、誘電率が３．０を下回ると、電圧印加時にベルト表面の電荷が不足し、紙の吸着力が不十分となり、誘電率が３０．０を越えると、樹脂と高誘電率粉末の複合材においては、高誘電率粉末の含有量が増加し、機械的強度の低下を大幅に招くので好ましくない。電極保護層１６が上述の所定の体積抵抗値と誘電率であれば、樹脂単体でも導電性粉末あるいは高誘電率粉末を適宜選定して樹脂に混ぜたものであってもよい。
【００２８】
ここで電極保護層１６の樹脂としては、熱可塑性樹脂、エラストマー、熱硬化性樹脂、ゴム等が挙げられ、ポリエチレン、エチレン−酢酸ビニル共重合体、エチレン−塩ビ共重合体、エチレンビニルアルコール共重合体、ポリプロピレン、塩化ビニル樹脂、塩素化塩化ビニル樹脂、ポリスチレン、ＡＳ樹脂、ＡＢＳ樹脂、メタクリル酸メチル樹脂、エチレンメタクリル酸共重合体、ポリビニルアルコール、セルロース、ナイロン樹脂、ポリアセタール、ポリカーボネート、変性ポリフェニレンエーテル、ポリブチレンテレフタレート、ポリエチレンテレフタレート、超高分子量ポリエチレン、ポリメチルペンテン、シンジオタックチックポリスチレン、ポリサルホン、ポリエーテルサルホン、ポリフタルアミド、ポリフェニレンサルファイド、ポリシクロへキシレンジメチレンテレフタレート、ポリアリレート、ポリエーテルイミド、ポリエーテルエーテルケトン、ポリイミド、液晶ポリマー、フッ素樹脂、スチレン系エラストマー、オレフィン系エラストマー、ポリウレタン系エラストマー、ポリエステル系エラストマー、塩ビ系エラストマー、ポリアミド系エラストマー、ポリエステル系エラストマー、フッ素樹脂系エラストマー、フェノール樹脂、ユリア樹脂、メラミン樹脂、不飽和ポリエステル樹脂、ジアリルフタレート樹脂、エポキシ樹脂、シリコーン樹脂、天然ゴム、イソプレン、スチレンブタジエンゴム、ブタジエンゴム、クロロプレンゴム、イソブチレン・イソプレンゴム、ニトリルブタジエンゴム、エチレンプロピレンゴム、塩素化ポリエチレンゴム、クロロスルフォン化ポリエチレンゴム、アクリルゴム、ウレタンゴム、シリコーンゴム、フッ素ゴム、エピクロルヒドリンゴムなどを用いることができる。これらのうち、樹脂単体として耐熱性を必要とする場合は、熱分解温度が２００℃以上の樹脂が好ましく、３００℃以上の樹脂がより好ましい。耐熱性と耐薬品性を必要とする場合には変性ポリフェニレンエーテル、ポリエーテルエーテルケトン、ポリサルホン、ポリエーテルサルホン、ポリフェニレンサルファイド、超高分子量ポリエチレン、ポリメチルペンテン、フッ素樹脂、オレフィン系エラストマー、フッ素樹脂系エラストマー、フッ素系ゴム、オレフィン系ゴム等を用いるのが好ましく、フッ素樹脂、フッ素樹脂系エラストマー、フッ素ゴム等からなるフッ素系樹脂、超高分子量ポリエチレン、ポリメチルペンテン、オレフィン系エラストマー、オレフィン系ゴム等からなるオレフィン系樹脂を用いるのがより好ましい。
【００２９】
また、電極保護層１６の体積抵抗値を調整するために用いられる導電性粉末としては、金属粉、金属フレーク、金属繊維、金属長繊維、カーボンブラック、炭素繊維、導電性ウィスカー、ポリエチレングリコール系グラファイト、グラファイト層間化合物などを挙げることができ、目的に応じてこれらの中から選ばれる少なくとも１種以上の導電性粉末が用いられる。導電性粉末の添加量は、目的とする電極保護層１６の体積抵抗値によって適宜設定されるが、通常２〜３０重量％が好ましく、３〜２０重量％がより好ましい。導電性粉末の大きさは、目的に応じて適宜選択されるが、平均粒子径が通常０．０１〜５０μｍのものが好ましく、特に平均粒子径が０．０１〜１０μｍのものがより好ましい。
【００３０】
また、電極保護層１６の誘電率を調整するために用いられる高誘電率粉末としては、誘電率が５０以上の無機粉末が用いられ、たとえば酸化チタン、チタン酸バリウム、チタン酸カリウム、チタン酸鉛、ニオブ酸鉛、チタン酸ジルコン酸塩などを挙げることができる。より好ましくは誘電率が５００以上の無機粉体が用いられるのがよく、たとえばチタン酸バリウム、チタン酸ジルコン酸鉛を挙げることができる。高誘電率粉末の形状は特に制限されないが、たとえば球形、フレーク状、ウイスカー状などがあり、目的に応じてこれらの中から選ばれる少なくとも１種以上の高誘電率粉末が用いられる。また、高誘電率粉末の大きさは特に制限はないが、たとえば球形の場合は、その直径が０．０１〜５０μｍのものを用いることができ、好ましくは０．０１〜２０μｍがよい。ウイスカー状の場合は、長さが１〜５０μｍ、径が０．５〜２０μｍのものを用いることができる。さらに、高誘電率粉末の添加量は、目的とする電極保護層１６の誘電率によって適宜設定されるが、通常５〜５０重量％が好ましく、１０〜３０重量％がより好ましい。
【００３１】
さらに、電極保護層１６は吸水率が低いことが好ましく、通常吸水率が２％以下がよい。特に、高温・高湿下でリーク電流を防ぎ、強い吸着力を維持するためには、電極保護層１６の吸水率が低い方がよい。たとえば、使用環境３０℃，８０％ＲＨでの吸着力を必要とする場合は、吸水率を１％以下とするのが好ましく、より好ましくは０．５％以下にするのがよい。
【００３２】
さらに、本発明の媒体搬送ベルトにおける表面処理剤及び／又は該表面処理剤から生じる化合物１５のうち、表面処理剤としてはシラン系カップリング剤、チタネート系カップリング剤、アルミニウム系カップリング剤、有機アミン、アミノ酸等が挙げられ、目的に応じてこれらの中から選ばれる少なくとも１種以上の表面処理剤が用いられ、管状物１２、電極パターン１４、電極保護層１６の種類によって適宜設定される。表面処理剤から生じる化合物としては、シラン系カップリング剤、チタネート系カップリング剤、アルミニウム系カップリング剤、有機アミン、アミノ酸等の塗布乾燥よって生成する化合物が挙げられ、反応化合物は塗布乾燥条件によって異なる。表面処理剤及び／又は該表面処理剤から生じる化合物１５の塗布量は、塗布される管状物１２、電極パターン１４、電極保護層１６からなる塗布される層の単位表面積（電極パターンの横断面積は除く）に対する表面処理剤及び／又は表面処理剤から生じる化合物１５の重量で表され、通常０．０００１〜３ｇ／ｍ^２が好ましく、０．００２〜２．５ｇ／ｍ^２がより好ましく０．０１〜２．０ｇ／ｍ^２がさらに好ましい。塗布量が０．０００１ｇ／ｍ^２を下回った場合は、管状物１２、電極パターン１４、電極保護層１６の各構成材料間の界面接着力が低下してしまうので好ましくない。また、塗布量が３ｇ／ｍ^２を上回った場合は、隣り合う電極パターン１４間の絶縁性が不足しリーク電流が流れてしまうことで、紙の吸着力が低下し、さら過剰の表面処理剤の分解によって電気絶縁性と電極保護層１６の外観が悪化するので好ましくない。
【００３３】
さらに、図９に示すように、本発明に係る媒体搬送ベルト２４がベルト表面に耐アルカリ性を必要とする場合であって、電極保護層１６のベース樹脂にポリアミドやポリイミド等の耐アルカリ性がない樹脂を用いる場合には、電極樹脂層１６の上にフッ素樹脂、オレフィン系樹脂などの耐アルカリ性を有する樹脂層２２を形成するのが好ましく、耐アルカリ性を有する樹脂層２２の体積抵抗値が１０⁹〜１０¹⁵Ω・ｃｍであり且つ誘電率が３．０〜５０．０である樹脂層を形成するのがより好ましい。
【００３４】
以上、本発明に係る媒体搬送ベルト１の構成の例を説明したが、次にこの媒体搬送ベルト１の製造方法の例を示す。
【００３５】
図２に示した媒体搬送ベルト１０の製造方法の一例を示す。ベースとなるポリイミド樹脂から成る管状物１２をたとえばキャスティング法によりシームレスベルトとして成形し、この管状物の外周表面に導電性を有する電極パターン１４を形成する。さらに、その電極パターン１４形成面上に表面処理剤を塗布乾燥し表面処理剤及び／又は該表面処理剤から生じる化合物１５の層を形成し、その外周面に交互に延び出す電極パターン１４の端部を除いて電極保護層１６をたとえば熱ロールなどにより貼り合わせて、媒体搬送ベルト１０を製造するのである。
【００３６】
図３に示した媒体搬送ベルト１１の製造方法の一例を示す。電極保護層１６の片面に表面処理剤を塗布乾燥し、表面処理剤及び／又は該表面処理剤から生じる化合物１５の層を形成し、表面処理面に導電性を有する電極パターン１６を形成する。さらに、ポリイミド樹脂から成る管状物１２の外周表面に交互に延び出す電極パターン１４の端部を除いて電極保護層１６の電極パターン１４面をたとえば熱ロールなどにより貼り合わせて、媒体搬送ベルト１１を製造するのである。
【００３７】
図４に示した媒体搬送ベルト１７の製造方法の一例を示す。ポリイミド樹脂から成る管状物１２の外周表面に表面処理剤を塗布乾燥し、表面処理剤及び／又は該表面処理剤から生じる化合物１５の層を形成し、さらに導電性を有する電極パターン１４を形成する。その電極パターン形成面上に、その外周面に交互に延び出す電極パターン１４の端部を除いて電極保護層１６をたとえば熱ロールなどにより貼り合わせて、媒体搬送ベルト１７を製造するのである。
【００３８】
図５に示した媒体搬送ベルト１８の製造方法の一例を示す。電極保護層１６の片面に導電性を有する電極パターン１４を形成し、電極パターン１４形成面上に表面処理剤を塗布乾燥し、表面処理剤及び／又は該表面処理剤から生じる化合物１５の層を形成する。さらに、ポリイミド樹脂から成る管状物１２の外周表面に交互に延び出す電極パターン１４の端部を除いて電極保護層の表面処理面とをたとえば熱ロールなどにより貼り合わせて、媒体搬送ベルト１８を製造するのである。
【００３９】
図６に示した媒体搬送ベルト１９の製造方法の一例を示す。電極保護層１６の片面に表面処理剤を塗布乾燥し、表面処理剤及び／又は該表面処理剤から生じる化合物１５の層を形成する。また、ポリイミド樹脂から成る管状物１２の外周表面にも表面処理剤を塗布乾燥し表面処理剤及び／又は該表面処理剤から生じる化合物１５の層を形成し、さらに導電性を有する電極パターン１４を形成する。この電極パターン１４形成面上に、その外周面に交互に延び出す電極パターン１４の端部を除いて電極保護層１６の表面処理面とをたとえば熱ロールなどにより貼り合わせて、媒体搬送ベルト１９を製造するのである。
【００４０】
さらに、図６に示した媒体搬送ベルト１９の製造方法の他の例を示す。ポリイミド樹脂から成る管状物１２の外周表面に表面処理剤を塗布乾燥し、表面処理剤及び／又は該表面処理剤から生じる化合物１５の層を形成する。さらに導電性を有する電極パターン１４を形成し、さらに、その外周面に表面処理剤を塗布乾燥し、表面処理剤及び／又は該該表面処理剤から生じる化合物１５の層を形成する。この外周表面に交互に延び出す電極パターン１４の端部を除いて電極保護層１６をたとえば熱ロールなどにより貼り合わせて、媒体搬送ベルト１９を製造するのである。
【００４１】
図７に示した媒体搬送ベルト２０の製造方法の一例を示す。電極保護層１６の片面に表面処理剤を塗布乾燥し、表面処理剤及び／又は該表面処理剤から生じる化合物１５の層を形成し、表面処理面に導電性を有する電極パターンを形成する。また、ポリイミド樹脂から成る管状物１２の外周表面にも表面処理剤を塗布乾燥し、表面処理剤及び／又は該表面処理剤から生じる化合物１５の層を形成する。さらに、ポリイミド樹脂から成る管状物２の表面処理面に、交互に延び出す電極パターン３の端部を除いて電極保護層の表面処理面とをたとえば熱ロールなどにより貼り合わせて、媒体搬送ベルト２０を製造するのである。
【００４２】
さらに、図７に示した媒体搬送ベルトの製造方法の他の例を示す。電極保護層の片面に表面処理剤を塗布乾燥し、表面処理剤及び／又は該表面処理剤から生じる化合物１５の層を形成し、表面処理面に導電性を有する電極パターン１４を形成する。さらに表面処理剤を塗布乾燥し、表面処理剤及び／又は該表面処理剤から生じる化合物１５の層を形成し、ポリイミド樹脂から成る管状物１２の外周表面に交互に延び出す電極パターン１４の端部を除いて電極保護層の電極パターン面とをたとえば熱ロールなどにより貼り合わせて、媒体搬送ベルト２０を製造するのである。
【００４３】
また、ポリイミド樹脂により予めフィルムを形成した後、そのフィルムの両端を接合してベルト状にして管状物１２を得た後、上述と同様に電極パターン１４表面処理剤及び／又は該表面処理剤から生じる化合物１５、電極保護層１６を形成して媒体搬送ベルト１０及び１１及び１７及び１８及び１９及び２０を製造してもよい。またあるいは、図８に示すように、ポリイミド樹脂により形成されたフィルム３４の表面に電極パターン１４、表面処理剤及び／又は該表面処理剤から生じる化合物１５を形成した後、さらに二点鎖線で示すように電極保護層１６を形成し、その後、フィルム２１の両端を接合してベルト状にして媒体搬送ベルト１０及び１１及び１７及び１８及び１９及び２０を製造してもよい。
【００４４】
これらの製造方法において、表面処理剤及び／又は表面処理剤から生じる化合物１５の形成方法は、溶媒に溶かした表面処理剤又は表面処理剤をバーコーター、ハケ、スプレーを用いて被処理体に塗布したり、溶媒に溶かした表面処理剤又は表面処理剤に被処理体を浸漬し、その後乾燥する等の方法があるが、これらに限定されるものではない。
【００４５】
これらの製造方法において、電極保護層１６の形成方法は、その樹脂をワニス状としておき、そのワニスを電極パターン１４の上に塗布したりするなどによって電極保護層１６を形成したり、あるいは予め電極保護層１６をフィルム状としておき、そのフィルムを電極パターン１４上にラミネートすることによって電極保護層１６を形成したりする方法がある。また、このラミネート法としては、熱プレス法若しくは熱ロール法による熱圧着法を挙げることができるが、これらに限定されるものではない。
【００４６】
これら各種の製造方法については、得られる媒体搬送ベルトの目的に応じて適宜選択することができ、また、管状物１２、表面処理剤及び／又は該表面処理剤から生じる化合物１５、電極保護層１６の材質に応じて適宜選択される。また、次に説明する他の媒体搬送ベルトの構造に対応させて、製造方法は適宜設定されるものである。
【００４７】
媒体搬送ベルトの構造は図１及び図２及び図３及び図４及び図５及び図６及び図７に示すものの他、たとえば図９に示すように、管状物１２の外周面に電極パターン１４、表面処理剤及び／又は該表面処理剤から生じる化合物１５、電極保護層１６を形成した媒体搬送ベルトにおいて、さらに電極保護層１６を保護するトップコート層２２を形成してもよい。トップコート層２２としては、たとえば上述した耐アルカリ性を有するフッ素樹脂などの樹脂層とすることができる。このトップコート層２２は電極保護層１６の外表面に形成されるだけでなく、図中二点鎖線で示すように、管状物１２の内周面に形成するのも好ましい。管状物１２の内周面にトップコート層２２と同じ材質を用い、ほぼ同じ厚みの樹脂層２３を形成することにより、得られた媒体搬送ベルト２４は反りの少ないものとなる。
【００４８】
また、図１０に示すように、管状物１２の外周面に電極パターン１４、表面処理剤及び／又は該表面処理剤から生じる化合物１５、電極保護層１６を形成した媒体搬送ベルトにおいて、その管状物１２の内周面側に電極保護層１６と同一の材質から成る樹脂層２６をほぼ同じ厚みで設けて媒体搬送ベルト２８を構成するのも好ましい。電極パターン１４を除いて、断面構造をほぼ対称形にすることにより、媒体搬送ベルト２８が反ってくるのを防止することができる。
【００４９】
さらに、図１１に示すように、管状物１２の外周面に電極パターン１４、表面処理剤及び／又は該表面処理剤から生じる化合物１５、電極保護層１６を形成するとともに、その管状物１２の内周面側に電極保護層１６と同一の材質から成る樹脂層２６をほぼ同じ厚みで設けた媒体搬送ベルトにおいて、さらに電極保護層６の表面にその電極保護層１６を保護するトップコート層２２を形成して、媒体搬送ベル２９を構成してもよい。また、この媒体搬送ベルト２９の内周面側の樹脂層２６の内面にトップコート層２０と同一の材質から成る樹脂層３２をほぼ同じ厚みで設けることも好ましい。
【００５０】
以上、本発明に係る媒体搬送ベルトを説明したが、上述の実施形態は例示であり、これらに限定されるものではないのは言うまでもない。その他、得られた媒体搬送ベルトの表面に種々の処理を施すことは任意になし得ることであり、本発明はその趣旨を逸脱しない範囲内で、当業者の知識に基づき種々なる改良、修正、変形を加えた態様で実施し得るものである。
〔実施例１〕
厚み５０μｍの非熱可塑性ポリイミドフィルム１２の片面にエポキシ系銀ペーストを用いて、図１に示すように、電極幅６mm、電極間距離３mm、厚み１０μｍの電極パターン１４を形成した。この電極パターン１４上に塗布量が１．０ｇ／ｃｍ²になるようにシランカップリング剤（Ａ１１００：日本ユニカー（株）製）の層１５を形成した軟質フッ素樹脂フィルム（セフラルソフトＧ１５０Ｆ２００：セントラル硝子（株）製）を温度２００℃で熱ラミネートし、電極保護層１６を形成した。その後、このフィルム３４を管状物状に接合して、媒体搬送ベルト１０を得た。
【００５１】
この媒体搬送ベルト１０の紙の吸着力は次のように測定した。電極パターン１４の電極間に３ｋＶの直流電圧を印加し、図１２に示すように、Ａ４判サイズの紙４０をベルト１０に吸着させた。その後、図中の矢印方向に、ベルト１０の面と平行な方向に紙４０を引っ張り、紙４０が動く時の最大の力を吸着力として測定した。その結果を表１に示す。
【００５２】
この媒体搬送ベルト１０の界面接着力はＪＩＳ Ｋ ６８５４「接着剤のはく離強さ試験方法」に準拠して評価した。試験方法の種類は１８０℃はく離試験とした。ベルトを幅２５ｍｍ、長さ２００ｍｍに切り取った（幅方向は電極パターンに対して平行方向、長さ方向は電極パターンに対して垂直方向とした）。ポリイミドフィルムと電極保護層の界面を１１０ｍｍ剥がした。ポリイミドフィルムの剛性をあげるためにポリイミドフィルムの裏側に両面テープでプラスチック板を貼り、プラスチック板と試験片の予めはく離した部分（セフラルソフトＧ１５０Ｆ２００）を規定する試験機のつかみ具に取り付けた。クロスヘッド移動速度は２００±２０ｍｍ／ｍｉｎとし、１８０℃ではく離を行い、はく離に対するチャートから最適直線法ではく離荷重（ｋｇ／ｃｍ）を求めた。その結果を表１に示す。
【００５３】
この媒体搬送ベルト１０の電気絶縁性は次のように評価した。電極パターン１４の電極間に直流電圧を０．５ｋＶ印加し、図１２に示すように、Ａ４判サイズの紙４０をベルト１０に吸着させた。その後、スプレーを用いて紙を水で濡らし、電圧を３ｋＶまで徐々に印加し、３ｋＶを１０秒間以上印加しても絶縁破壊しなかったものには「○」、３ｋＶを１秒間以上１０秒間以下印加して絶縁破壊したものには「△」、３ｋＶ以下で絶縁破壊をしたものには「×」を示した。その結果を表１に示す。
【００５４】
この媒体搬送ベルト１０の外観は次のように評価した。ベルト表面に斑点模様が見えないものには「○」、斑点が見えるものには「×」を記した。その結果を表１に示す。
〔実施例２〜４〕
シランカップリング剤層を表１に示す塗布量で形成した以外は、実施例１と同様にして媒体搬送ベルト１０を得た。すなわち、シランカップリング剤層を、実施例２では０．０２ｇ／ｃｍ²、実施例３では０．２ｇ／ｃｍ²、実施例４では３．０ｇ／ｃｍ²の塗布量で形成した。そして、実施例１と同様にして、紙４０の吸着力、界面接着力、電気絶縁性、外観を測定評価した。その結果を表１に示す。
〔実施例５〕
カップリング剤層をチタネート系カップリング剤（ＫＲ４４：味の素（株）製）により形成した以外は、実施例１と同様にして媒体搬送ベルト１０を得た。そして、実施例１と同様にして、紙４０の吸着力、界面接着力、電気絶縁性、外観を測定評価した。その結果を表１に示す。
〔実施例６〕
電極保護層に軟質フッ素樹脂１００部にチタン酸バリウム（ＢＴ−１００Ｐ：富士チタン工業（株）製）１００部を添加したフィルムを用いた以外は、実施例１と同様にして媒体搬送ベルト１０を得た。そして、実施例１と同様にして、紙４０の吸着力、界面接着力、電気絶縁性、外観を測定評価した。その結果を表１に示す。
〔実施例７〕
電極保護層にＰＶＦ（ＴＴＲ１０ＢＧ３：デュポン（株）製）を用いた以外は、実施例１と同様にして媒体搬送ベルト１０を得た。そして、実施例１と同様にして、紙４０の吸着力、界面接着力、電気絶縁性、外観を測定評価した。その結果を表１に示す。
〔実施例８〕
電極保護層にＰＶＦ（ＴＷＨ１５ＢＬ３：デュポン（株）製）を用いた以外は、実施例１と同様にして媒体搬送ベルト１０を得た。そして、実施例１と同様にして、紙４０の吸着力、界面接着力、電気絶縁性、外観を測定評価した。その結果を表１に示す。
〔実施例９〕
厚み５０μｍの非熱可塑性ポリイミドフィルム１２の両面に塗布量が１．０ｇ／ｃｍ²になるようにシランカップリング剤（Ａ１１００：日本ユニカー（株）製）の層１５を形成した。エポキシ系銀ペーストを用いて、図３に示すように、電極幅６mm、電極間距離３mm、厚み１０μｍの電極パターン１４を形成した。この電極パターン１４上に軟質フッ素樹脂フィルム（セフラルソフトＧ１５０Ｆ２００：セントラル硝子（株）製）を温度２００℃で熱ラミネートし、電極保護層１６を形成した。その後、このフィルム３４を管状物状に接合して、媒体搬送ベルト１０を得た。
【００５５】
そして、実施例１と同様にして、紙４０の吸着力、界面接着力、電気絶縁性、外観を測定評価した。その結果を表１に示す。
〔比較例１〕
カップリング剤層を形成しない以外は、実施例１と同様にして媒体搬送ベルト１０を得た。そして、実施例１と同様にして、紙４０の吸着力、界面接着力、電気絶縁性、外観を測定評価した。その結果、表１に示すように、界面接着力は非常に劣るものであった。
〔比較例２〕
シランカップリング剤層を５．０ｇ／ｃｍ²の塗布量で形成した以外は、実施例１と同様にして媒体搬送ベルト１０を得た。そして、実施例１と同様にして、紙４０の吸着力、界面接着力、電気絶縁性、外観を測定評価した。その結果、表１に示すように、紙の吸着力、電気絶縁性、外観は非常に劣るものであった。
〔比較例３〕
チタネート系カップリング剤層を５．０ｇ／ｃｍ²の塗布量で形成した以外は、実施例５と同様にして媒体搬送ベルト１０を得た。そして、実施例１と同様にして、紙４０の吸着力、界面接着力、電気絶縁性、外観を測定評価した。その結果、表１に示すように、紙の吸着力、電気絶縁性、外観は非常に劣るものであった。
〔比較例４〕
カップリング剤層を形成しない以外は、実施例６と同様にして媒体搬送ベルト１０を得た。そして、実施例１と同様にして、紙４０の吸着力、界面接着力、電気絶縁性、外観を測定評価した。その結果、表１に示すように、界面接着力は非常に劣るものであった。
〔比較例５〕
シランカップリング剤層を５．０ｇ／ｃｍ²の塗布量で形成した以外は、実施例６と同様にして媒体搬送ベルト１０を得た。そして、実施例１と同様にして、紙４０の吸着力、界面接着力、電気絶縁性、外観を測定評価した。その結果、表１に示すように、紙の吸着力、電気絶縁性、外観は非常に劣るものであった。
〔比較例６〕
カップリング剤層を形成しない以外は、実施例７と同様にして媒体搬送ベルト１０を得た。そして、実施例１と同様にして、紙４０の吸着力、界面接着力、電気絶縁性、外観を測定評価した。その結果、表１に示すように、界面接着力は非常に劣るものであった。
〔比較例７〕
シランカップリング剤層を５．０ｇ／ｃｍ²の塗布量で形成した以外は、実施例７と同様にして媒体搬送ベルト１０を得た。そして、実施例１と同様にして、紙４０の吸着力、界面接着力、電気絶縁性、外観を測定評価した。その結果、表１に示すように、紙の吸着力、電気絶縁性、外観は非常に劣るものであった。
〔比較例８〕
カップリング剤層を形成しない以外は、実施例１と同様にして媒体搬送ベルト１０を得た。そして、実施例１と同様にして、紙４０の吸着力、界面接着力、電気絶縁性、外観を測定評価した。その結果、表１に示すように、界面接着力は非常に劣るものであった。
〔比較例９〕
シランカップリング剤層を５．０ｇ／ｃｍ²の塗布量で形成した以外は、実施例１と同様にして媒体搬送ベルト１０を得た。そして、実施例１と同様にして、紙４０の吸着力、界面接着力、電気絶縁性、外観を測定評価した。その結果、表１に示すように、紙の吸着力、電気絶縁性、外観は非常に劣るものであった。
【００５６】
【表１】

【００５７】
【発明の効果】
本発明に係る媒体搬送ベルトは、管状物に電極パターンを形成し、電圧を印加することによって紙を静電吸着させることとし、ベルトの構成及び材料特性を特定し、管状物、電極パターン、電極保護層といった各々の構成材料間に所定量の表面処理剤及び／又は該表面処理剤から生じる化合物の層を形成することによって、プリンターなどの高速度化を達成するために、印字用などの媒体を強く吸着させることができ、管状物、電極パターン、電極保護層といった各々の構成材料間の界面接着力が優れており、さらに使用条件などに対応させて、優れた耐熱性、電気絶縁性、外観を備えたものとなった。
【図面の簡単な説明】
【図１】本発明に係る媒体搬送ベルトの斜視説明図である。
【図２】図１に示す媒体搬送ベルトの要部拡大断面説明図である。
【図３】図１に示す媒体搬送ベルトの製造方法の実施形態を示す要部平面説明図である。
【図４】本発明に係る媒体搬送ベルトの他の実施形態を示す要部拡大断面説明図である。
【図５】本発明に係る媒体搬送ベルトの更に他の実施形態を示す要部拡大断面説明図である。
【図６】本発明に係る媒体搬送ベルトの更に他の実施形態を示す要部拡大断面説明図である。
【図７】本発明に係る媒体搬送ベルトの更に他の実施形態を示す要部拡大断面説明図である。
【図８】本発明に係る媒体搬送ベルトの更に他の実施形態を示す要部拡大断面説明図である。
【図９】本発明に係る媒体搬送ベルトの更に他の実施形態を示す要部拡大断面説明図である。
【図１０】本発明に係る媒体搬送ベルトの更に他の実施形態を示す要部拡大断面説明図である。
【図１１】本発明に係る媒体搬送ベルトの更に他の実施形態を示す要部拡大断面説明図である。
【図１２】本発明に係る媒体搬送ベルトの吸着力の実験方法を示す要部平面説明図である。
【符号の説明】
１０，１１，１７，１８，１９，２０，２４，２８，２９：媒体搬送ベルト
１２：管状物
１４：電極パターン
１５：表面処理剤及び／又は表面処理剤から生じる化合物
１６：電極保護層
２１：フィルム
２２：トップコート層
２３，２６，３２：樹脂層
４０：紙[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a medium conveying belt, and more specifically, a belt used for conveying a paper, an OHP film, or the like used for an electrophotographic apparatus such as a copying machine, a laser beam printer, or a facsimile, or a paper for an inkjet printer apparatus or a bubble jet printer apparatus. The present invention relates to a belt used for transporting, drying, etc.
[0002]
[Prior art]
Used for transporting paper, OHP film, etc. for paper and OHP film used in electrophotographic devices such as copying machines, laser beam printers, facsimiles, etc. In order to convey paper and OHP film at high speed, the medium for printing can be strongly adsorbed, and the medium conveyance with heat resistance and chemical resistance according to the use conditions etc. The belt is known.
[0003]
In this medium conveying belt, an electrode pattern having conductivity is formed on the outer peripheral surface of a tubular article formed of polyimide resin, and the volume resistance value is 10 on the electrode pattern. ^Ten -10 ¹⁵ An electrode protective layer having an Ω · cm and a dielectric constant of 3.0 to 30.0 is formed, and paper can be electrostatically adsorbed by applying a voltage to the electrode pattern.
[0004]
Further, in the medium transport belt, a resin layer having alkali resistance is formed on the outer peripheral surface of the electrode protective layer, and in the medium transport belt, the volume resistance value of the resin layer having alkali resistance is 10 ^Ten -10 ¹⁵ A composite resin layer having an Ω · cm and a dielectric constant of 3.0 to 30.0 is formed, and in the medium transport belt, the electrode protective layer is formed of a conductive powder and / or a high resin in a fluororesin. It is a composite resin layer formed by mixing a dielectric constant powder. Further, in the medium transport belt, the electrode protective layer includes a polyvinyl fluoride resin mixed with a conductive powder and / or a high dielectric constant powder. By forming the composite resin layer, a medium transport belt excellent in heat resistance and chemical resistance can be obtained.
[0005]
[Problems to be solved by the invention]
In order to convey a medium such as paper or OHP at a high speed, it is necessary to increase the rotation speed of the belt. By increasing the rotation speed, the interface between the tubular object, the electrode pattern, and the electrode protective layer does not peel off. In addition, it was necessary to increase the adhesive strength between the interfaces.
[0006]
Therefore, the present inventors can strongly adsorb a medium for printing or the like in order to achieve high speed of a printer or the like, and interface adhesion between each constituent material such as a tubular material, an electrode pattern, and an electrode protective layer. As a result of intensive studies and research to obtain a medium transport belt that has excellent strength and is heat resistant, electrically insulating, and externally adapted to the conditions of use, an electrode pattern is formed on the tubular object. By applying voltage, the paper is electrostatically adsorbed, and by specifying the belt configuration and material characteristics, the paper transportability and the interfacial adhesion between the components, heat resistance, electrical insulation, appearance The inventors have come up with a medium conveying belt according to the present invention which is excellent in the above.
[0007]
[Means for Solving the Problems]
Tubular material molded from polyimide resin, conductive electrode pattern, volume resistivity is 10 ⁹ -10 ¹⁵ In a belt comprising an electrode protective layer having an Ω · cm and a dielectric constant of 3.0 to 50.0, a surface treatment agent and a surface treatment agent are provided between the polyimide resin and the electrode protective layer. / Or the compound which arises from this surface treating agent is 0.0001-3g / m ² It is a medium conveyance belt characterized by existing.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of a medium conveying belt according to the present invention will be described with reference to the drawings.
[0009]
As shown in FIGS. 1, 2, and 3, in the medium transport belts 10 and 11 according to the present invention, an electrode pattern 14 having conductivity is formed on the outer peripheral surface of a tubular article 12 formed of polyimide resin. And a surface treatment agent on the electrode pattern forming surface and / Or the compound 15 which arises from this surface treating agent is 0.0001-3 g / m ² In addition, the volume resistance value is 10 ⁹ -10 ¹⁵ An electrode protective layer 16 having an Ω · cm and a dielectric constant of 3.0 to 50.0 is formed.
[0010]
Further, as shown in FIGS. 4 and 5, in the medium conveying belts 17 and 18 according to the present invention, a surface treatment agent and a surface treatment agent are formed on the outer peripheral surface of the tubular article 12 formed of polyimide resin. / Or the compound 15 which arises from this surface treating agent is 0.0001-3 g / m ² The electrode pattern 14 having conductivity is formed on the formation surface of the compound, and the volume resistance value is 10 on the electrode pattern formation surface. ⁹ -10 ¹⁵ An electrode protective layer 16 having an Ω · cm and a dielectric constant of 3.0 to 50.0 is formed.
[0011]
Further, as shown in FIGS. 6 and 7, in the medium transport belts 19 and 20 according to the present invention, an electrode pattern 14 having conductivity is formed on the outer peripheral surface of the tubular article 12 formed of polyimide resin. The volume resistance value is 10 on the electrode pattern forming surface. ⁹ -10 ¹⁵ An electrode protective layer 16 having an Ω · cm and a dielectric constant of 3.0 to 50.0 is formed, and a surface treatment agent is formed on each interface of the tubular body 12, the electrode pattern 14, and the electrode protective layer 16. as well as / Or the compound 15 which arises from this surface treating agent is 0.0001g-3g / m ² It exists to exist.
[0012]
The tubular article 12 of the medium conveying belt of the present invention is a combination of a film made of a non-thermoplastic polyimide resin and a thermoplastic polyimide resin or a film thereof, or one or more thermoplastic polyimide resins or a film thereof, or It is formed of a non-thermoplastic polyimide resin. That is, the method of forming the tubular article 12 will be described more specifically. A method of forming a tubular shape by joining both ends of a non-thermoplastic (thermosetting) polyimide film with a thermoplastic polyimide resin, or a thermoplastic polyimide A method of forming a tube by heating and bonding both ends of the film, or by laminating a non-thermoplastic polyimide film and a thermoplastic polyimide film by shifting the positions of their butted ends and forming a tube, and heat bonding By doing so, a method of forming a tube can be used. Furthermore, a method of directly forming a non-thermoplastic polyimide resin or a thermoplastic polyimide resin into a tubular shape using a mold or the like can be used, and the tubular article 12 may be formed by any method, and is not particularly limited.
[0013]
As the thermoplastic polyimide resin to be used, a glass transition temperature Tg of 150 ° C. or higher, preferably 230 ° C. or higher is preferably selected. The medium transport belt is a belt used for transporting paper or OHP film in an electrophotographic apparatus such as a copying machine, laser beam printer, or facsimile, or transport and drying of paper or OHP film in an ink jet printer apparatus or bubble jet printer apparatus. It is a belt used for etc. Therefore, the thermoplastic polyimide resin constituting the medium transport belt under the belt usage conditions has a glass transition temperature Tg of 150 ° C. or higher, more preferably 230 ° C. or higher, so that the thermoplastic used at a glass transition temperature Tg or lower is used. The polyimide resin functions as a heat resistant resin.
[0014]
Next, an example of the thermoplastic polyimide resin used for the medium conveying belt of the present invention is shown. The polyimide film used in the heat resistant resin belt of the present invention has a glass transition temperature Tg of 150 ° C. or higher, more preferably 230 ° C. or higher, and has heat resistance in relation to the belt use conditions. Used. As the polyimide film having such heat resistance, a thermoplastic polyimide film is particularly preferable. Unlike a conventional thermosetting polyimide film, a thermoplastic polyimide film has heat resistance and melt fluidity at a predetermined high temperature range, and is excellent in workability. Moreover, the adhesiveness of the seam part in the heat resistant resin belt of this invention is excellent with respect to the thermosetting polyimide film. The thermoplastic polyimide according to the present invention has a chemical structural formula of the general formula (1)
[0015]
[Chemical 1]

Wherein m, n is equal to each repeating unit mole fraction of the polymer chain, m is in the range of about 0.1 to about 0.9, and n is in the range of about 0.9 to about 0.1. (However, the ratio of m to n is about 0.01 to about 9.0. A and B are both tetravalent organic groups, and X and Y are divalent organic groups.) The structure represented by is preferably the main component. Furthermore, as acid dianhydride, A in the general formula (1) which is a monomer imparting thermoplasticity is represented by the general formula (2).
[0016]
[Chemical formula 2]

(Wherein R ₁ , R ₂ Represents a divalent organic group. It is preferably at least one selected from the group of tetravalent organic groups represented by Furthermore, B in the general formula (1) is
[0017]
[Chemical 3]

(Wherein R ₁ , R ₂ Represents a divalent organic group. It is preferably at least one selected from the group of tetravalent organic groups represented by Further, as diamine, X and Y in the general formula (1) are monomers that impart thermoplasticity.
[0018]
[Formula 4]

(Wherein R ₁ Represents a divalent organic group. ), And chemical formula 5
[0019]
[Chemical formula 5]

It is preferable that it is at least 1 sort (s) selected from the group of the bivalent organic group represented by these.
[0020]
Here, an example of the manufacturing method of the thermoplastic polyimide which can be applied to the heat resistant resin belt of this invention is shown. The thermoplastic polyimide is composed of an acid dianhydride having an ester group in the molecular chain represented by the general formula (2) (preferably 10 to 90 mol%) and an aromatic acid dianhydride represented by the chemical formula (3) ( Polyamide, which is a polyimide precursor solution, by reacting an acid dianhydride preferably composed of pyromellitic dianhydride) with a diamine represented by the general formula (3) Chemical Formula 12 and Chemical Formula 13 in an organic solvent. An acid solution is obtained. Further, polyimide is obtained by further drying by heating and imidization. Needless to say, this embodiment is merely an example, and the present invention is not limited thereto.
[0021]
The thermoplastic polyimide resin used for the medium conveying belt is not limited to the above structural formula, but is preferable. As the thermoplastic film, for example, a film made of only thermoplastic polyimide may be used, or a film made of thermoplastic polyimide mixed with an additive may be used.
[0022]
Moreover, as a non-thermoplastic (thermosetting) polyimide film used for the medium conveying belt of the present invention, the general formula (2)
[0023]
[Chemical 6]

(However, R ₁ Hakka 7
[0024]
[Chemical 7]

A tetravalent organic group represented by R ₂ Is a hydrogen atom or a monovalent substituent, m and n are integers, and take a value of m / n = 0.1-100. Although a film made of a resin having a structural formula represented by formula (1) can be used, this is an example.
[0025]
The non-thermoplastic polyimide film contains all the resins expressed as thermosetting polyimide resin or reaction curable polyimide resin. As the non-thermoplastic polyimide film, for example, a film made only of a non-thermoplastic polyimide resin may be used, but a film made by mixing an additive with a non-thermoplastic polyimide film may be used. In order to mix the additive with the non-thermoplastic polyimide film, the additive is mixed with the precursor.
[0026]
In the medium transport belt of the present invention, a predetermined electrode pattern 14 is formed on the surface of the tubular article 12, and the electrode pattern 14 has its ends extended alternately so that a voltage can be applied. . The electrode pattern 14 is formed by screen-printing a conductive paste made of silver, copper, aluminum, carbon, or the like on the surface of the tubular article 12 or depositing a metal foil or metal thin film such as aluminum or copper on the surface of the tubular article 12. After that, by etching, a predetermined electrode pattern 14 is formed, or a metal such as aluminum is vapor-deposited through a mask on which the predetermined electrode pattern 14 is formed, thereby forming the predetermined electrode pattern 14. Configured. The electrode pattern 14 is not limited to the illustrated shape. For example, the electrode pattern 14 may be formed in a comb-teeth shape and may be a pattern in which the comb teeth and the comb teeth mesh with each other. The thickness of the electrode pattern 14 is 2 to 30 μm, preferably 5 to 20 μm, considering surface irregularities due to the electrode pattern. Furthermore, the line width and pitch of the electrode pattern 14 are arbitrary and can be set variously.
[0027]
In the medium conveyance belt of the present invention, on the outer peripheral surface of the tubular article 12 on which the electrode pattern 14 is formed, static electricity is applied to the electrode pattern 14 to adsorb paper on the surface of the electrode protective layer 16 The volume resistance value is 10 ⁹ -10 ¹⁵ An electrode protective layer 16 having an Ω · cm and a dielectric constant of 3.0 to 50.0 is formed. In particular, the volume resistance value of the electrode protective layer 16 is 10. ⁹ -10 ¹⁵ Ω · cm, preferably 10 ^Ten -10 ¹⁴ Ω · cm is good and the dielectric constant is 3.0 to 30.0, preferably 5.0 to 20.0. Volume resistance value is 10 ⁹ If it is less than Ω · cm, the insulation between the adjacent electrode patterns 14 is insufficient, and a leakage current flows, which is not preferable. The volume resistance value is 10 ¹⁵ If it exceeds Ω · cm, the residual charge remains long even after the voltage applied to the electrode pattern 14 is removed, and the paper remains adsorbed, which is not preferable. On the other hand, if the dielectric constant is less than 3.0, the charge on the belt surface becomes insufficient when a voltage is applied, and the paper adsorption force becomes insufficient. If the dielectric constant exceeds 30.0, a composite of resin and high dielectric constant powder is obtained. In the material, the content of the high dielectric constant powder is increased, and the mechanical strength is significantly lowered. As long as the electrode protective layer 16 has the above-described predetermined volume resistance value and dielectric constant, the resin alone or a conductive powder or a high dielectric constant powder may be appropriately selected and mixed with the resin.
[0028]
Here, examples of the resin for the electrode protective layer 16 include thermoplastic resins, elastomers, thermosetting resins, rubbers, and the like, polyethylene, ethylene-vinyl acetate copolymer, ethylene-vinyl chloride copolymer, ethylene vinyl alcohol copolymer. Coalescence, polypropylene, vinyl chloride resin, chlorinated vinyl chloride resin, polystyrene, AS resin, ABS resin, methyl methacrylate resin, ethylene methacrylic acid copolymer, polyvinyl alcohol, cellulose, nylon resin, polyacetal, polycarbonate, modified polyphenylene ether, Polybutylene terephthalate, polyethylene terephthalate, ultra high molecular weight polyethylene, polymethylpentene, syndiotactic polystyrene, polysulfone, polyethersulfone, polyphthalamide, polyphenylene sulfide Polycyclohexylenedimethylene terephthalate, polyarylate, polyetherimide, polyetheretherketone, polyimide, liquid crystal polymer, fluororesin, styrene elastomer, olefin elastomer, polyurethane elastomer, polyester elastomer, PVC elastomer, polyamide elastomer , Polyester elastomer, fluororesin elastomer, phenol resin, urea resin, melamine resin, unsaturated polyester resin, diallyl phthalate resin, epoxy resin, silicone resin, natural rubber, isoprene, styrene butadiene rubber, butadiene rubber, chloroprene rubber, isobutylene・ Isoprene rubber, nitrile butadiene rubber, ethylene propylene rubber, chlorinated polyethylene rubber, chloros Polyethylene rubber, acryl rubber, urethane rubber, silicone rubber, fluorine rubber, epichlorohydrin rubber and the like. Among these, when heat resistance is required as a single resin, a resin having a thermal decomposition temperature of 200 ° C. or higher is preferable, and a resin of 300 ° C. or higher is more preferable. When heat resistance and chemical resistance are required, modified polyphenylene ether, polyether ether ketone, polysulfone, polyether sulfone, polyphenylene sulfide, ultrahigh molecular weight polyethylene, polymethylpentene, fluororesin, olefin elastomer, fluororesin It is preferable to use a fluorine-based elastomer, a fluorine-based rubber, an olefin-based rubber, etc., a fluorine-based resin composed of a fluorine resin, a fluorine-resin-based elastomer, a fluorine rubber, etc., an ultrahigh molecular weight polyethylene, a polymethylpentene, an olefin-based elastomer, an olefin-based rubber. It is more preferable to use an olefin-based resin composed of, for example.
[0029]
The conductive powder used for adjusting the volume resistance value of the electrode protective layer 16 includes metal powder, metal flakes, metal fibers, metal long fibers, carbon black, carbon fibers, conductive whiskers, polyethylene glycol graphite. And graphite intercalation compounds, and at least one kind of conductive powder selected from these may be used according to the purpose. Although the addition amount of electroconductive powder is suitably set with the volume resistance value of the target electrode protective layer 16, 2-30 weight% is preferable normally and 3-20 weight% is more preferable. Although the magnitude | size of electroconductive powder is suitably selected according to the objective, that whose average particle diameter is 0.01-50 micrometers normally is preferable, and its average particle diameter of 0.01-10 micrometers is especially more preferable.
[0030]
In addition, as the high dielectric constant powder used for adjusting the dielectric constant of the electrode protective layer 16, an inorganic powder having a dielectric constant of 50 or more is used, for example, titanium oxide, barium titanate, potassium titanate, lead titanate. , Lead niobate, zirconate titanate, and the like. More preferably, an inorganic powder having a dielectric constant of 500 or more is used, and examples thereof include barium titanate and lead zirconate titanate. The shape of the high dielectric constant powder is not particularly limited, and examples thereof include a spherical shape, a flake shape, and a whisker shape, and at least one high dielectric constant powder selected from these is used depending on the purpose. The size of the high dielectric constant powder is not particularly limited. For example, in the case of a spherical shape, a powder having a diameter of 0.01 to 50 μm can be used, and preferably 0.01 to 20 μm. In the case of a whisker shape, one having a length of 1 to 50 μm and a diameter of 0.5 to 20 μm can be used. Furthermore, although the addition amount of high dielectric constant powder is suitably set with the dielectric constant of the target electrode protective layer 16, 5-50 weight% is preferable normally and 10-30 weight% is more preferable.
[0031]
Furthermore, the electrode protective layer 16 preferably has a low water absorption rate, and usually has a water absorption rate of 2% or less. In particular, in order to prevent leakage current at high temperature and high humidity and maintain a strong adsorption force, it is preferable that the electrode protective layer 16 has a low water absorption rate. For example, when it is necessary to have an adsorptive power in an operating environment of 30 ° C. and 80% RH, the water absorption rate is preferably 1% or less, and more preferably 0.5% or less.
[0032]
Furthermore, the surface treatment agent in the medium conveying belt of the present invention and / Alternatively, among the compounds 15 generated from the surface treatment agent, examples of the surface treatment agent include silane coupling agents, titanate coupling agents, aluminum coupling agents, organic amines, amino acids, and the like. At least one kind of surface treatment agent selected from the inside is used, and is appropriately set depending on the types of the tubular article 12, the electrode pattern 14, and the electrode protective layer 16. Examples of the compound generated from the surface treatment agent include a compound produced by coating and drying of a silane coupling agent, a titanate coupling agent, an aluminum coupling agent, an organic amine, an amino acid, and the like. Different. Surface treatment agent and / Alternatively, the amount of the compound 15 generated from the surface treatment agent is the surface treatment relative to the unit surface area (excluding the cross-sectional area of the electrode pattern) of the applied layer consisting of the tubular object 12 to be applied, the electrode pattern 14 and the electrode protective layer 16. Agent and / Or expressed by the weight of the compound 15 generated from the surface treatment agent, and usually 0.0001-3 g / m ² Is preferred, 0.002-2.5 g / m ² Is more preferably 0.01 to 2.0 g / m ² Is more preferable. Application amount is 0.0001 g / m ² If the ratio is lower than the range, the interfacial adhesive force among the constituent materials of the tubular body 12, the electrode pattern 14, and the electrode protective layer 16 is lowered, which is not preferable. The coating amount is 3 g / m ² Exceeds the above, the insulation between the adjacent electrode patterns 14 is insufficient and leakage current flows, so that the paper adsorption force is reduced, and further, the surface treatment agent is decomposed, resulting in electrical insulation and electrode protection. Since the external appearance of the layer 16 deteriorates, it is not preferable.
[0033]
Furthermore, as shown in FIG. 9, the medium transport belt 24 according to the present invention requires alkali resistance on the belt surface, and the base resin of the electrode protective layer 16 is a resin having no alkali resistance such as polyamide or polyimide. Is preferably formed on the electrode resin layer 16 with an alkali resistance resin layer 22 such as a fluororesin or an olefin resin, and the volume resistance value of the alkali resistance resin layer 22 is 10. ⁹ -10 ¹⁵ It is more preferable to form a resin layer having an Ω · cm and a dielectric constant of 3.0 to 50.0.
[0034]
As mentioned above, although the example of the structure of the medium conveyance belt 1 which concerns on this invention was demonstrated, the example of the manufacturing method of this medium conveyance belt 1 is shown next.
[0035]
An example of the manufacturing method of the medium conveyance belt 10 shown in FIG. 2 is shown. A tubular article 12 made of a polyimide resin as a base is formed as a seamless belt by, for example, a casting method, and an electrode pattern 14 having conductivity is formed on the outer peripheral surface of the tubular article. Furthermore, a surface treatment agent is applied and dried on the surface on which the electrode pattern 14 is formed, and the surface treatment agent and / Alternatively, a layer of the compound 15 generated from the surface treatment agent is formed, and the electrode protective layer 16 is bonded to the outer peripheral surface of the medium pattern belt 14 except for the ends of the electrode patterns 14 that are alternately extended by, for example, a hot roll. Is manufactured.
[0036]
An example of the manufacturing method of the medium conveyance belt 11 shown in FIG. 3 is shown. A surface treatment agent is applied and dried on one surface of the electrode protective layer 16, and the surface treatment agent and / Alternatively, a layer of the compound 15 generated from the surface treatment agent is formed, and an electrode pattern 16 having conductivity is formed on the surface treatment surface. Further, the surface of the electrode pattern 14 of the electrode protective layer 16 is bonded to the outer peripheral surface of the tubular article 12 made of polyimide resin alternately by, for example, a hot roll except for the end portions of the electrode pattern 14, and the medium transport belt 11 is attached. To manufacture.
[0037]
An example of the manufacturing method of the medium conveyance belt 17 shown in FIG. 4 is shown. A surface treatment agent is applied and dried on the outer peripheral surface of the tubular article 12 made of polyimide resin, and the surface treatment agent and / Alternatively, a layer of the compound 15 generated from the surface treatment agent is formed, and further an electrode pattern 14 having conductivity is formed. On the electrode pattern forming surface, the medium transport belt 17 is manufactured by adhering the electrode protective layer 16 with, for example, a heat roll except for the ends of the electrode patterns 14 that alternately extend to the outer peripheral surface.
[0038]
An example of the manufacturing method of the medium conveyance belt 18 shown in FIG. 5 will be shown. An electrode pattern 14 having conductivity is formed on one surface of the electrode protective layer 16, a surface treatment agent is applied and dried on the electrode pattern 14 formation surface, and the surface treatment agent and / Alternatively, a layer of the compound 15 generated from the surface treatment agent is formed. Further, the medium transport belt 18 is manufactured by pasting the surface treatment surface of the electrode protective layer except for the end portions of the electrode pattern 14 alternately extending on the outer peripheral surface of the tubular article 12 made of polyimide resin by, for example, a hot roll. To do.
[0039]
An example of the manufacturing method of the medium conveyance belt 19 shown in FIG. 6 is shown. A surface treatment agent is applied and dried on one surface of the electrode protective layer 16, and the surface treatment agent and / Alternatively, a layer of the compound 15 generated from the surface treatment agent is formed. Further, a surface treatment agent is applied and dried on the outer peripheral surface of the tubular article 12 made of polyimide resin, and the surface treatment agent and / Alternatively, a layer of the compound 15 generated from the surface treatment agent is formed, and further an electrode pattern 14 having conductivity is formed. On the surface where the electrode pattern 14 is formed, the surface treatment surface of the electrode protective layer 16 except for the ends of the electrode pattern 14 which alternately extend to the outer peripheral surface is bonded with, for example, a hot roll, and the medium transport belt 19 is attached. To manufacture.
[0040]
Furthermore, another example of the manufacturing method of the medium conveying belt 19 shown in FIG. 6 will be shown. A surface treatment agent is applied and dried on the outer peripheral surface of the tubular article 12 made of polyimide resin, and the surface treatment agent and / Alternatively, a layer of the compound 15 generated from the surface treatment agent is formed. Further, an electrode pattern 14 having conductivity is formed, and further, a surface treatment agent is applied and dried on the outer peripheral surface, and the surface treatment agent and / Alternatively, a layer of the compound 15 generated from the surface treatment agent is formed. The medium transport belt 19 is manufactured by adhering the electrode protective layer 16 with, for example, a hot roll except for the ends of the electrode patterns 14 that alternately extend on the outer peripheral surface.
[0041]
An example of the manufacturing method of the medium conveyance belt 20 shown in FIG. 7 is shown. A surface treatment agent is applied and dried on one surface of the electrode protective layer 16, and the surface treatment agent and / Alternatively, a layer of the compound 15 generated from the surface treatment agent is formed, and an electrode pattern having conductivity is formed on the surface treatment surface. Further, a surface treatment agent is applied and dried on the outer peripheral surface of the tubular article 12 made of polyimide resin, and the surface treatment agent and / Alternatively, a layer of the compound 15 generated from the surface treatment agent is formed. Further, the surface treatment surface of the tubular article 2 made of polyimide resin is bonded to the surface treatment surface of the electrode protective layer except for the ends of the electrode patterns 3 that alternately extend, for example, by a hot roll, and the medium conveyance belt 20. Is manufactured.
[0042]
Furthermore, another example of the method for manufacturing the medium conveying belt shown in FIG. 7 will be described. Apply and dry the surface treatment agent on one side of the electrode protective layer, / Alternatively, a layer of the compound 15 generated from the surface treatment agent is formed, and the electrode pattern 14 having conductivity is formed on the surface treatment surface. Furthermore, the surface treatment agent is applied and dried, and the surface treatment agent and / Alternatively, a layer of the compound 15 formed from the surface treatment agent is formed, and the electrode pattern surface of the electrode protective layer is removed from the electrode pattern surface except for the ends of the electrode pattern 14 that alternately extend to the outer peripheral surface of the tubular body 12 made of polyimide resin. The medium conveying belt 20 is manufactured by laminating with a roll or the like.
[0043]
Moreover, after forming a film beforehand with a polyimide resin, after joining the both ends of the film and making it into the belt shape and obtaining the tubular article 12, surface treatment agent of the electrode pattern 14 and the same as above-mentioned / Alternatively, the medium transport belts 10 and 11 and 17 and 18 and 19 and 20 may be manufactured by forming the compound 15 generated from the surface treatment agent and the electrode protective layer 16. Alternatively, as shown in FIG. 8, the electrode pattern 14, the surface treatment agent, and the surface of the film 34 formed of polyimide resin are used. / Alternatively, after forming the compound 15 generated from the surface treatment agent, the electrode protective layer 16 is further formed as indicated by a two-dot chain line, and then both ends of the film 21 are joined to form a belt to form the medium transport belts 10 and 11. And 17 and 18 and 19 and 20 may be manufactured.
[0044]
In these production methods, a surface treatment agent and / Alternatively, the compound 15 formed from the surface treatment agent may be formed by applying a surface treatment agent dissolved in a solvent or a surface treatment agent to a target object using a bar coater, brush, or spray, or a surface treatment agent dissolved in a solvent or Although there exist methods, such as immersing a to-be-processed object in a surface treating agent and drying after that, it is not limited to these.
[0045]
In these manufacturing methods, the electrode protective layer 16 is formed by forming the electrode protective layer 16 by leaving the resin in the form of a varnish and coating the varnish on the electrode pattern 14 or by previously forming an electrode. There is a method in which the protective layer 16 is formed as a film and the electrode protective layer 16 is formed by laminating the film on the electrode pattern 14. Examples of the laminating method include, but are not limited to, a hot press method or a thermocompression bonding method using a hot roll method.
[0046]
About these various manufacturing methods, it can select suitably according to the objective of the medium conveyance belt obtained, and the tubular article 12, surface treatment agent, and / Or it selects suitably according to the material of the compound 15 and electrode protective layer 16 which arise from this surface treating agent. Further, the manufacturing method is appropriately set in accordance with the structure of another medium transport belt described below.
[0047]
As shown in FIGS. 1, 2, 3, 4, 5, 6, and 7, the structure of the medium conveying belt is not limited to that shown in FIG. Surface treatment agent and / Alternatively, a topcoat layer 22 for protecting the electrode protective layer 16 may be further formed on the medium transport belt on which the compound 15 generated from the surface treatment agent and the electrode protective layer 16 are formed. As the top coat layer 22, for example, a resin layer such as the above-described fluororesin having alkali resistance can be used. The top coat layer 22 is preferably formed not only on the outer surface of the electrode protective layer 16 but also on the inner peripheral surface of the tubular article 12 as indicated by a two-dot chain line in the figure. By using the same material as the topcoat layer 22 on the inner peripheral surface of the tubular article 12 and forming the resin layer 23 having substantially the same thickness, the obtained medium transport belt 24 has less warpage.
[0048]
Further, as shown in FIG. 10, the electrode pattern 14, the surface treatment agent, and / Alternatively, in the medium transport belt in which the compound 15 generated from the surface treatment agent and the electrode protective layer 16 are formed, a resin layer 26 made of the same material as the electrode protective layer 16 is formed on the inner peripheral surface side of the tubular member 12 with substantially the same thickness. It is also preferable that the medium conveying belt 28 is provided. By making the cross-sectional structure substantially symmetrical except for the electrode pattern 14, it is possible to prevent the medium conveying belt 28 from warping.
[0049]
Furthermore, as shown in FIG. 11, the electrode pattern 14, the surface treatment agent and / Alternatively, a medium in which the compound 15 formed from the surface treatment agent and the electrode protective layer 16 are formed, and a resin layer 26 made of the same material as the electrode protective layer 16 is provided on the inner peripheral surface side of the tubular article 12 with substantially the same thickness. In the transport belt, the medium transport bell 29 may be configured by further forming a topcoat layer 22 for protecting the electrode protective layer 16 on the surface of the electrode protective layer 6. It is also preferable to provide a resin layer 32 made of the same material as the topcoat layer 20 on the inner surface of the resin layer 26 on the inner peripheral surface side of the medium transport belt 29 with substantially the same thickness.
[0050]
As mentioned above, although the medium conveyance belt which concerns on this invention was demonstrated, the above-mentioned embodiment is an illustration and it cannot be overemphasized that it is not limited to these. In addition, it is possible to arbitrarily perform various treatments on the surface of the obtained medium conveying belt, and various improvements, modifications, and modifications are made based on the knowledge of those skilled in the art without departing from the spirit of the present invention. It can be implemented in a modified form.
[Example 1]
As shown in FIG. 1, an electrode pattern 14 having an electrode width of 6 mm, an inter-electrode distance of 3 mm, and a thickness of 10 μm was formed on one surface of a non-thermoplastic polyimide film 12 having a thickness of 50 μm. The coating amount on this electrode pattern 14 is 1.0 g / cm. ² A soft fluororesin film (Cefal Soft G150F200: manufactured by Central Glass Co., Ltd.) on which a layer 15 of a silane coupling agent (A1100: manufactured by Nihon Unicar Co., Ltd.) was formed was thermally laminated at a temperature of 200 ° C. to protect the electrode. Layer 16 was formed. Thereafter, the film 34 was joined into a tubular shape to obtain the medium transport belt 10.
[0051]
The paper adsorption force of the medium conveying belt 10 was measured as follows. A DC voltage of 3 kV was applied between the electrodes of the electrode pattern 14, and A4 size paper 40 was adsorbed to the belt 10 as shown in FIG. Thereafter, the paper 40 was pulled in a direction parallel to the surface of the belt 10 in the direction of the arrow in the figure, and the maximum force when the paper 40 moved was measured as an adsorption force. The results are shown in Table 1.
[0052]
The interfacial adhesive strength of the medium conveying belt 10 was evaluated according to JIS K 6854 “Testing method for peel strength of adhesive”. The type of test method was a 180 ° C. peeling test. The belt was cut to a width of 25 mm and a length of 200 mm (the width direction was parallel to the electrode pattern, and the length direction was perpendicular to the electrode pattern). The interface between the polyimide film and the electrode protective layer was peeled off by 110 mm. In order to increase the rigidity of the polyimide film, a plastic plate was attached to the back side of the polyimide film with a double-sided tape, and the polyimide film was attached to a holding tool of a testing machine that preliminarily separated the plastic plate and the test piece (cefural soft G150F200). The crosshead moving speed was 200 ± 20 mm / min, separation was performed at 180 ° C., and a separation load (kg / cm) was determined by an optimum linear method from a chart for the separation. The results are shown in Table 1.
[0053]
The electrical insulation of the medium transport belt 10 was evaluated as follows. A DC voltage of 0.5 kV was applied between the electrodes of the electrode pattern 14, and A4 size paper 40 was adsorbed to the belt 10 as shown in FIG. 12. Then, wet the paper with water using a spray, gradually apply the voltage to 3 kV, and “3” for those that did not break down even if 3 kV was applied for 10 seconds or more, 3 kV for 1 second or more and 10 seconds or less “Δ” indicates that the dielectric breakdown was applied and “×” indicates that the dielectric breakdown occurred at 3 kV or less. The results are shown in Table 1.
[0054]
The appearance of the medium transport belt 10 was evaluated as follows. “○” is marked on the belt surface where no speckled pattern is visible, and “X” is marked on the belt surface where the speckled pattern is visible. The results are shown in Table 1.
[Examples 2 to 4]
A medium conveying belt 10 was obtained in the same manner as in Example 1 except that the silane coupling agent layer was formed with the coating amount shown in Table 1. That is, the silane coupling agent layer was 0.02 g / cm in Example 2. ² In Example 3, 0.2 g / cm ² In Example 4, 3.0 g / cm ² The coating amount was formed. Then, in the same manner as in Example 1, the adsorptive power, interfacial adhesive strength, electrical insulation, and appearance of the paper 40 were measured and evaluated. The results are shown in Table 1.
Example 5
A medium conveying belt 10 was obtained in the same manner as in Example 1 except that the coupling agent layer was formed of a titanate coupling agent (KR44: manufactured by Ajinomoto Co., Inc.). Then, in the same manner as in Example 1, the adsorptive power, interfacial adhesive strength, electrical insulation, and appearance of the paper 40 were measured and evaluated. The results are shown in Table 1.
Example 6
The medium transport belt 10 was formed in the same manner as in Example 1 except that a film in which 100 parts of soft fluororesin was added to 100 parts of barium titanate (BT-100P: manufactured by Fuji Titanium Industry Co., Ltd.) was used for the electrode protective layer. Obtained. Then, in the same manner as in Example 1, the adsorptive power, interfacial adhesive strength, electrical insulation, and appearance of the paper 40 were measured and evaluated. The results are shown in Table 1.
Example 7
A medium conveying belt 10 was obtained in the same manner as in Example 1 except that PVF (TTR10BG3: manufactured by DuPont) was used for the electrode protective layer. Then, in the same manner as in Example 1, the adsorptive power, interfacial adhesive strength, electrical insulation, and appearance of the paper 40 were measured and evaluated. The results are shown in Table 1.
Example 8
A medium conveying belt 10 was obtained in the same manner as in Example 1 except that PVF (TWH15BL3: manufactured by DuPont) was used for the electrode protective layer. Then, in the same manner as in Example 1, the adsorptive power, interfacial adhesive strength, electrical insulation, and appearance of the paper 40 were measured and evaluated. The results are shown in Table 1.
Example 9
The coating amount is 1.0 g / cm on both surfaces of the non-thermoplastic polyimide film 12 having a thickness of 50 μm. ² A layer 15 of a silane coupling agent (A1100: manufactured by Nippon Unicar Co., Ltd.) was formed so as to be. As shown in FIG. 3, an electrode pattern 14 having an electrode width of 6 mm, an interelectrode distance of 3 mm, and a thickness of 10 μm was formed using an epoxy-based silver paste. On this electrode pattern 14, a soft fluororesin film (Cefal Soft G150F200: manufactured by Central Glass Co., Ltd.) was thermally laminated at a temperature of 200 ° C. to form an electrode protective layer 16. Thereafter, the film 34 was joined into a tubular shape to obtain the medium transport belt 10.
[0055]
Then, in the same manner as in Example 1, the adsorptive power, interfacial adhesive strength, electrical insulation, and appearance of the paper 40 were measured and evaluated. The results are shown in Table 1.
[Comparative Example 1]
A medium conveying belt 10 was obtained in the same manner as in Example 1 except that no coupling agent layer was formed. Then, in the same manner as in Example 1, the adsorptive power, interfacial adhesive strength, electrical insulation, and appearance of the paper 40 were measured and evaluated. As a result, as shown in Table 1, the interfacial adhesive force was very poor.
[Comparative Example 2]
Silane coupling agent layer 5.0 g / cm ² A medium conveying belt 10 was obtained in the same manner as in Example 1 except that the medium was formed in the coating amount. Then, in the same manner as in Example 1, the adsorptive power, interfacial adhesive strength, electrical insulation, and appearance of the paper 40 were measured and evaluated. As a result, as shown in Table 1, the adsorptive power, electrical insulation and appearance of the paper were very poor.
[Comparative Example 3]
Titanate coupling agent layer 5.0 g / cm ² A medium conveying belt 10 was obtained in the same manner as in Example 5 except that it was formed with the coating amount. Then, in the same manner as in Example 1, the adsorptive power, interfacial adhesive strength, electrical insulation, and appearance of the paper 40 were measured and evaluated. As a result, as shown in Table 1, the adsorptive power, electrical insulation and appearance of the paper were very poor.
[Comparative Example 4]
A medium conveying belt 10 was obtained in the same manner as in Example 6 except that no coupling agent layer was formed. Then, in the same manner as in Example 1, the adsorptive power, interfacial adhesive strength, electrical insulation, and appearance of the paper 40 were measured and evaluated. As a result, as shown in Table 1, the interfacial adhesive force was very poor.
[Comparative Example 5]
Silane coupling agent layer 5.0 g / cm ² A medium conveying belt 10 was obtained in the same manner as in Example 6 except that it was formed with the coating amount. Then, in the same manner as in Example 1, the adsorptive power, interfacial adhesive strength, electrical insulation, and appearance of the paper 40 were measured and evaluated. As a result, as shown in Table 1, the adsorptive power, electrical insulation and appearance of the paper were very poor.
[Comparative Example 6]
A medium conveying belt 10 was obtained in the same manner as in Example 7 except that the coupling agent layer was not formed. Then, in the same manner as in Example 1, the adsorptive power, interfacial adhesive strength, electrical insulation, and appearance of the paper 40 were measured and evaluated. As a result, as shown in Table 1, the interfacial adhesive force was very poor.
[Comparative Example 7]
Silane coupling agent layer 5.0 g / cm ² A medium conveying belt 10 was obtained in the same manner as in Example 7 except that it was formed with the coating amount. Then, in the same manner as in Example 1, the adsorptive power, interfacial adhesive strength, electrical insulation, and appearance of the paper 40 were measured and evaluated. As a result, as shown in Table 1, the adsorptive power, electrical insulation and appearance of the paper were very poor.
[Comparative Example 8]
A medium conveying belt 10 was obtained in the same manner as in Example 1 except that no coupling agent layer was formed. Then, in the same manner as in Example 1, the adsorptive power, interfacial adhesive strength, electrical insulation, and appearance of the paper 40 were measured and evaluated. As a result, as shown in Table 1, the interfacial adhesive force was very poor.
[Comparative Example 9]
Silane coupling agent layer 5.0 g / cm ² A medium conveying belt 10 was obtained in the same manner as in Example 1 except that the medium was formed in the coating amount. Then, in the same manner as in Example 1, the adsorptive power, interfacial adhesive strength, electrical insulation, and appearance of the paper 40 were measured and evaluated. As a result, as shown in Table 1, the adsorptive power, electrical insulation and appearance of the paper were very poor.
[0056]
[Table 1]

[0057]
【The invention's effect】
The medium transport belt according to the present invention forms an electrode pattern on a tubular object, electrostatically adsorbs paper by applying a voltage, specifies the configuration and material characteristics of the belt, the tubular object, the electrode pattern, and the electrode A predetermined amount of surface treatment agent between each constituent material such as a protective layer and / Alternatively, by forming a compound layer generated from the surface treatment agent, a medium for printing or the like can be strongly adsorbed in order to achieve high speed of a printer or the like, and a tubular product, an electrode pattern, an electrode protective layer The interfacial adhesive strength between each of the constituent materials is excellent, and in addition, it has excellent heat resistance, electrical insulation and appearance according to the use conditions.
[Brief description of the drawings]
FIG. 1 is an explanatory perspective view of a medium conveying belt according to the present invention.
FIG. 2 is an enlarged cross-sectional explanatory view of a main part of the medium transport belt shown in FIG.
FIG. 3 is an explanatory plan view of relevant parts showing an embodiment of a method for manufacturing the medium conveying belt shown in FIG. 1;
FIG. 4 is an enlarged cross-sectional explanatory view of a main part showing another embodiment of the medium transport belt according to the present invention.
FIG. 5 is an enlarged cross-sectional explanatory view of a main part showing still another embodiment of the medium transport belt according to the present invention.
FIG. 6 is an enlarged cross-sectional explanatory view of a main part showing still another embodiment of the medium transport belt according to the present invention.
FIG. 7 is an enlarged cross-sectional explanatory view of a main part showing still another embodiment of the medium transport belt according to the present invention.
FIG. 8 is an enlarged cross-sectional explanatory view of a main part showing still another embodiment of the medium transport belt according to the present invention.
FIG. 9 is an enlarged cross-sectional explanatory view of a main part showing still another embodiment of the medium transport belt according to the present invention.
FIG. 10 is an enlarged cross-sectional explanatory view of a main part showing still another embodiment of the medium transport belt according to the present invention.
FIG. 11 is an enlarged cross-sectional explanatory view of a main part showing still another embodiment of the medium transport belt according to the present invention.
FIG. 12 is an explanatory plan view of a main part showing an experiment method for the adsorption force of the medium transport belt according to the present invention.
[Explanation of symbols]
10, 11, 17, 18, 19, 20, 24, 28, 29: Medium transport belt
12: Tubular
14: Electrode pattern
15: Surface treatment agent and / Or a compound derived from a surface treatment agent
16: Electrode protective layer
21: Film
22: Topcoat layer
23, 26, 32: Resin layer
40: Paper

Claims (9)

In a belt made of a tubular article formed of a polyimide resin, an electrode pattern having conductivity, and an electrode protective layer having a volume resistivity of 10 ⁹ to 10 ¹⁵ Ω · cm and a dielectric constant of 3.0 to 50.0 In addition, 0.0001-3 g / m ² of a surface treatment agent and / or a compound generated from the surface treatment agent is present between the polyimide resin and the electrode protective layer, and the surface treatment agent is a silane coupling agent or a titanate cup. coupling agents, aluminum coupling agents, organic amines, media transport belt, characterized in der Rukoto least one selected from amino acids. The belt according to claim 1, wherein the surface treatment agent and / or the compound produced from the surface treatment agent is 0.0001 to between the conductive electrode pattern and the polyimide resin and / or between the electrode pattern and the electrode protective layer. The medium conveying belt according to claim 1, wherein 3 g / m ^{2 is} present. The medium conveying belt according to claim 1, wherein the conductive electrode pattern is formed on an outer peripheral surface of a tubular article formed of a polyimide resin. The electrode protective layer, the thermal decomposition temperature of the claims 1-3, wherein any one, characterized in that the 200 ° C. or more resins is a conductive powder and / or the high dielectric constant composite resin layer comprising a powder mixture of Medium transport belt. Claim 1-4 conveyance belt according to any one, wherein the water absorption of the electrode protective layer is not more than 1.0%. The electrode protective layer, according to claim 1-5 conveyance belt according to any one, characterized in that the fluorine-based resin is a conductive powder and / or a high dielectric constant powder composite resin layer comprising a mixture of. The electrode protective layer is, the medium conveying belt according to any one of claims 1-6, characterized in that the olefin resin is a conductive powder and / or a high dielectric constant powder composite resin layer comprising a mixture of. Claim 1-7 conveyance belt according to any one characterized by forming a resin layer having alkali resistance on the outer peripheral surface of the electrode protective layer. The medium transport belt according to claim 8 , wherein the resin layer having alkali resistance has a volume resistance value of 10 ⁹ to 10 ¹⁵ Ω · cm and a dielectric constant of 3.0 to 50.0.

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