JP3600636B2 - Welding member and method for improving its peeling characteristics - Google Patents

Description

【００２３】
本発明の溶着部材は、従って、アルミニウムのような金属の基層と、公知のエマーソンコーニング（Ｅｍｅｒｓｏｎ Ｃｏｒｎｉｎｇ ）Ｓ１１、ダウコーニング（Ｄｏｗ Ｃｏｒｎｉｎｇ）１２００、ダウコーニング６０６０、ユニオンカーバイド（Ｕｎｉｏｎ Ｃａｒｂｉｄｅ ）から入手可能なオルガノ官能性シランのような公知の接着剤の如き下塗り接着層と、シロキサンの最上表面層とを含み、そのような層に含まれるフィラーは、ここに記載の如く、水素化シリコーンオイルと反応することが可能である。
【００２４】
本発明の典型的な溶着ロールは多層溶着ロールを有する溶着アセンブリに関連して記載され、多層溶着ロールは順番に続けて、基体支持部材、その上に比較的厚いシリコーンエラストマー層、アミノシラン下塗り層、接着層、シリコーンエラストマー層中に分散した金属酸化物フィラー層を含み、そこで、フィラーは１又は２以上のＳｉＨ官能基を有するシリコーンオイルと反応を引き起こす。基体支持部材は、典型的には中空のシリンダ又はコアであるが、好適な加熱要素を中空部分中に有しており、加熱要素はシリンダと同じ拡がりとなっている。バックアップ又は加圧ロールが溶着ロールと同時に運転され、それらは、コピー紙や他の支持体がトナー画像を溶着ロールのエラストマー溶着表面と接触するように、そこを通過する溶着ニップ又は接触アークを形成する。バックアップロールは、表面にテフロン〔ＴＥＦＬＯＮ： イーアイデュポンドニューメラス社（Ｅ．Ｉ．ＤｕＰｏｎｔ ｄｅ Ｎｅｍｏｕｒｓ，Ｉｎｃ．， ）の登録商標〕表面層２４の薄層を有する硬質の鋼鉄コアを有する。油だめは、官能基を有する高分子剥離剤を含有している。該剥離剤はＳｉＨ官能基を有するもので、ここに記載のように反応して溶着表面とトナーとの間に中間バリア層を形成する。２つの剥離剤供給ロールは油だめから表面へと高分子剥離剤を供給するために配置される。これら２つの剥離剤供給ロールは回転可能に取り付けられ、油だめからエラストマーの溶着表面へと剥離剤を移送する。一つのロールは部分的に油だめに浸漬しており、その表面上の剥離剤を油だめから供給ロールへ移送する。計量ブレードを使用することにより、高分子剥離流体の層を初めに供給ロールへ、引き続き、エラストマーの溶着表面へ、剥離流体のサブミクロンの厚みから数ミクロンの単位の厚みの範囲で制御された厚みで、供給することができる。従って、計量デバイスによって、エラストマーの溶着表面の表面へ約０．１から約２μｍ又はそれ以上の厚みの剥離流体の層を供給することができる。
【００２５】
金属酸化物フィラー粒子は、不規則な形状を有してもよいが、粉体、小平板状、球状、繊維状、長円形粒子等のいずれの形状の金属酸化物も溶着表面に使用することができる。基体支持部材は如何なる好適な物質も選択しうる。典型的に、アルミニウム、アルマイト、鋼、ニッケル、銅等から選択しうる。ある具体例においては、それはアルミニウムチューブ又は代案としてはアルミニウムを溶射したスチールチューブである。
【００２６】
本発明に従えば、多層溶着部材はオフセット性に対して、実質的に、画像のスティッキングがない等を実現するという劇的な進歩を達成した。
【００２７】
如何なる好適な熱伝導性シリコーンエラストマーゴム層も基体に採用することができる。典型的には、一般的には高温度加硫（ＨＴＶｓ）として知られる過酸化物で硬化しうるポリオルガノシロキサンから製造され、それは、典型的に、下記式で示される如きビニル側基を有するポリジメチルシロキサン類である。
【００２８】
【化２】

【００２９】
含まれているトリフルオロプロピル、シアノプロピル、フェニル及びビニル基は、シリコーンゴムに硬化特性、機械的又は化学的特性を付与するためにメチル基のいくつかと通常は置換されている。フェニル基の導入は加硫物の弾性を低下し、引張及び引き裂き強度を向上する。フェニル基は加硫化率を減少する。トリフルオロプロピル基は耐溶剤性を向上する。低い割合でビニル基を導入すると、加硫温度が低下し、より大きな弾性とより低い圧縮永久歪をゴムに付与する。過酸化物硬化ゴムはビニルジメチルシロキシを末端としていてもよい。最も一般的に使用される過酸化物は、ベンゾイルパーオキサイド及びビス（ジクロロベンゾイル）パーオキサイドである。ジクミルパーオキサイドはビニル含有高分子用に使用しうる。一般的に、添加する過酸化物は、０．２から１．０％であり、硬化は１２０℃から１４０℃で行う。さらに、２，５−ジメチル−２，５−ビス（ｔ−ブチルパーオキシ）ヘキサンにような、他の過酸化物を１８０℃以上の温度でＨＴＶｓを架橋するのに使用しうる。
【００３０】
典型的に、ＨＴＶの層は、コア物質上にモールディング（モールド成形）又は押出によって厚みが約１ｍｍから約３ｍｍで適用される。典型的には、１２０℃から１８０℃の間の温度で２０から３０分間硬化するが、使用される特殊な過酸化物に依存する。
【００３１】
特に効果的な接着物質としては、ガンマアミノプロピルトリエトキシシランを含む。ガンマアミノプロピルトリエトキシシランはユニオンカーバイド社からオルガノファンクショナルシランＡ−１１００（ＯＲＧＡＮＯＦＵＮＣＴＩＯＮＡＬ ＳＩＬＡＮＥ Ａ−１１００： 商標）という製品名で入手可能であり、他の好適な物質は、Ｎ−（２−アミノエチル−３−アミノプロピル）トリメトキシシラン、６−（アミノヘキシルアミノプロピル）トリメトキシシラン、ｐ−アミノフェニルトリメトキシシラン、３−（１−アミノプロポキシ）３，３−ジメチル−１−プロペニルトリメトキシシラン、３−アミノプロピルトリス（メトキシエトキシエトキシ）シラン及びＮ−（２−アミノエチル）−３−アミノプロピルメチルジメトキシシランを含む。
【００３２】
シリコーンゴム溶着被覆物中に分散する金属酸化物は、ＳｉＨ剥離オイルの官能基と反応しうることを要し、反応して、例えば、熱可塑性トナー樹脂を剥離し、トナーと高表面エネルギーのフィラーとを接触させないような、熱的に安定なフィルムを形成する。ある好ましい金属酸化物は酸化アルミニウムであり、好ましくは、高分子成分の約６０から７０重量％の量で含まれる。金属酸化物の粒子径は重要であり、高分子の硬化が過剰なモジュラスを作る程小さすぎるべきでもなく、化合物の速すぎる破壊を開始する大きな欠陥をもたらす程大きすぎるべきでもない。典型的に、金属酸化物の平均粒子径は約１から約７５μｍであり、好ましくは、直径約１０μｍである。
【００３３】
本発明の溶着部材の表面は好ましくは、ロールであり、好ましくは鋳造又はモールド成形により製造されたロールである。
【００３４】
溶着部材は導電性フィラー粒子を濃厚に充填したＨＴＶシリコーンゴムを、脱脂し、表面を砂吹きつけによって粗面化したアルミニウムコア上にモールディング又は押出すること、例えば、所望により、汎用の下塗り剤で下塗りし、引き続き、硬化させ、後硬化することによって製造することができる。
【００３５】
以下、特に表示がなければ、部及び％は重量部及び重量％を表す。
【００３６】
【実施例】
（実施例Ｉ：コントロール）
１８０ｇのジシラノール、ローヌプーラン社（Ｒｈｏｎｅ−Ｐｏｕｌｅｎｃ Ｃｏｍｐａｎｙ ）製の、α、ωヒドロキシポリジメチルシロキサンを含有すると思われ、約７５０センチストークスの平均粘度を有するロードルシル ４８Ｖ７５０（ＲＨＯＤＯＲＳＩＬ ４８Ｖ７５０： 商標）を、４２０ｇのα、ωヒドロキシポリジメチルシロキサンを含有すると思われ、約３５００センチストークスの平均粘度を有するロードルシル ４８Ｖ３５００（商標）と混合した。該混合物は数平均分子量約１５０００のジシラノールと考えられる。この混合物をサーモスタットで制御された電気ヒーターを備えたベイカーパーキンスモデルＡＮ２（Ｂａｋｅｒ Ｐｅｒｋｉｎｓ Ｍｏｄｅｌ ＡＮ２ ）ミキサーに入れた。この混合物に１２８４ｇのアルコアＴ６１チューブラーアルミナ（Ａｌｃｏａ Ｔ６１ ＴＡＢＵＬＡＲ ＡＬＵＭＩＮＡ：商標）、３２５メッシュを約１０分間に亘って添加した。その後、１５０．６ｇのマピコレッド２９７（ＭＡＰＩＣＯ ＲＥＤ ２９７： 商標）、最終的な粒子サイズが約０．４μｍの酸化鉄を、該混合物に１０分間に亘って添加し、混合物を室温で約２．５時間混合した。この混合物にストウファケミカル社（Ｓｔａｕｆｆｅｒ Ｃｈｅｍｉｃａｌ Ｃｏｍｐａｎｙ ）製のシルボンド（ＳＩＬＢＯＮＤ：商標）高濃度エチルシリケート４５ｇを添加し、混合を１時間継続した。この混合物に、３ｇのジブチル錫ジラウレート触媒を添加し、この混合物をその後、溶着ロールとして試験するために、アルミニウムロール上に厚さが６０から７０ミル（１５２４．０３から１７７８．０１４μｍ）の間になるようにコートした。該ロールを温度１５８°Ｆ（７０℃）にして、３時間硬化した。該溶着ロールを、その後、ゼロックス社（Ｘｅｒｏｘ Ｃｏｒｐｏｒａｔｉｎ）４８５０のようなゼログラフィーの印刷機中にオイル評価のために配置した。他の溶着ロールを準備し、同様の方法で評価した。コートした溶着ロールを円周ロール速度約１５インチ／秒（３８．１ｃｍ／秒）で運転し、溶着ロールと圧縮ロール間にバイアスされる応力は溶着ロールの長手方向に沿って３０ポンド／直線インチ（５．３６ｋｇ／ｃｍ）であった。溶着ロールの温度は約３３５°Ｆ（１６８．３℃）に保持した。非官能性ポリジメチルシロキサンオイルの１３０００センチストークスの剥離剤を溶着ロールに適用し、予備印刷フォームの様々なタイプを、スチレン−ｎ−ブチルメタクリレート９０％とリーガル３３０（ＲＥＧＡＬ ３３０：登録商標）カーボンブラック１０％とを含むトナーを溶着するための基体として用いた。不完全に乾燥した予備印刷フォームからの溶着ロールへのインクオフセットは、約１０枚の現像されたコピー作成後、プロセスが容認できないほどに明白であった。
【００３７】
（実施例ＩＩ：比較品）
実施例Ｉの溶着ロール部材をゼロックス社の４８５０機に設備し、剥離オイルとしてゼロックス社製の１０７５溶着オイルである非官能性ポリシロキサンオイルを使用した。予備印刷フォーム用に使用したインクは、ニューヨーク州ロチェスター、Ｎｏ．６１ハーステッドストリートのロンインク社（Ｒｏｎ Ｉｎｋ Ｃｏｍｐａｎｙ ）からレーザージェットブルー（ＬＡＳＥＲ ＪＥＴ ＢＬＵＥ： 商標）として市販されているものである。乾燥していないこのインクからの予備印刷フォームは、４８５０機を１２回通過した時に、溶着表面上にオフセットを観察した。該オフセットは溶着表面の観察により目視で確認された。このインクで印刷された予備印刷フォームは、２５℃で５２時間乾燥し、その後、前記機械を３００プリント通過したとき、溶着ロール表面の目視による評価で僅かなオフセットが明らかであった。
【００３８】
（実施例ＩＩＩ ：本発明品）
実施例Ｉの溶着ロールを、剥離オイルとしてアメリカヒュルス社からＰＳ１２３．８として得た水素化オイルとゼロックス社製の１０７５溶着オイルとの１５：８５の混合物を選択した以外は、実施例ＩＩのプロセスに従って試験した。レーザージェットブルー（商標）インクを用いた予備印刷フォームは、２５℃で単に３．５時間乾燥した後にインクオフセットは観察されなかった、さらに、乾燥なしでもインクオフセットは観察されなかった。
【００３９】
（実施例ＩＶ：比較品）
実施例Ｉの溶着ロールを、ゼロックス社製の１０７５非官能性溶着剥離剤として用いて、実施例ＩＩのプロセスに従って試験した。フォームはデトロイトのプリントインク社（Ｐｒｉｎｔ Ｉｎｋ Ｃｏｍｐａｎｙ ）から入手可能なパントーン３４０−Ｕグリーン（ＰＡＮＴＯＮＥ ３４０−Ｕ ＧＲＥＥＮ：商標）インクによって印刷した。印刷されたフォームは広範囲におよぶオフセットが明白であった。フォームを５０時間乾燥したのちは、実施例ＩＩＩ における如く、インクオフセットはなかった。
【００４０】
（実施例Ｖ：本発明品）
官能性水素化オイルとして、アメリカヒュルス社からＰＳ１２３．８として得た水素化オイルと１０７５溶着オイルとの１５：８５の混合物を用いて、実施例ＩＶのプロセスを繰り返した。９時間の乾燥後、オフセットは観察されなかった。そして、乾燥なしでは僅かなオフセットが観察された。
【００４１】
（実施例ＶＩ：比較品）
実施例Ｉのプロセスを非官能性の１０７５溶着オイルを用いてゼロックス社４８５０機で繰り返した。そこで用いられたフォームはプリントインク社が供給するＨＲルビンレッド（ＨＲ ＲＵＢＩＮＥ ＲＥＤ：商標）によって印刷した。フォームは、実施例ＩＶにおけるのと同様に、インクの乾燥をしない場合、溶着表面に広範囲におよぶオフセットが明白であった。また、フォームを５０時間乾燥した後は、実施例ＩＩＩ における如く、容認しうるインクオフセットであった。
【００４２】
（実施例ＶＩＩ ：本発明品）
官能性水素化オイルとして、アメリカヒュルス社からＰＳ１２３．８として得た水素化オイルとゼロックス社製の１０７５溶着オイルとの１５：８５の混合物を用いて、実施例ＶＩのプロセスを繰り返した。２８時間の乾燥後、オフセットは観察されなかった。そして、乾燥なしでは僅かなオフセットが観察された。
【００４３】
（実施例ＶＩＩＩ：比較品）
実施例Ｉのプロセスを１０７５溶着オイルを用いてゼロックス社４８５０機で繰り返した。そこで用いられたフォームはパントーン３４０−Ｕグリーン（商標）によって予備印刷された。フォームは、実施例ＩＶにおけるのと同様に、３５０時間乾燥した溶着表面に広範囲におよぶオフセットが明白であった。
【００４４】
（実施例ＩＸ：本発明品）
官能性水素化オイルとして、ヒュルスオブアメリカ社からＰＳ１２３．８として得た水素化オイルとゼロックス社製の１０７５溶着オイルとの１５：８５の混合物を用いて、実施例ＶＩＩＩのプロセスを繰り返した。１７０時間の乾燥後、オフセットは観察されなかった。そして、乾燥なしでは僅かなオフセットが観察された。
【００４５】
前記各実施例から明らかなように、例えば、様々なインクで印刷された予備印刷フォームを標準の１０７５溶着オイルを用いて４８５０機で複写するのに用いた場合、これらのフォームが乾燥されていなかった場合、高範囲なオフセットを示した。オフセットを容認しうるレベルにするには、これらのフォームは通常、長時間に亘り乾燥される。水素化オイルと１０７５溶着オイルとの混合物を用いた場合、オフセットは観察されないか、又は、最小レベルのオフセットが観察された。
【００４６】
【発明の効果】
本発明の溶着ロール及びその剥離特性改良方法は前記構成としたので、溶着ロールからトナーを剥離し易くし、オフセットをなくするか又は最小化し、溶着ラチチュードを向上するという優れた効果を示した。[0001]
[Industrial applications]
The present invention relates generally to fuser members, and more particularly, the present invention relates to a functional release agent for a fusing roll, for example, to facilitate release of toner from the fusing roll. In embodiments, the release agent of the present invention comprises a hydride (SiH) functional oil that is coated on the substrate of the fusing roll to prevent offset, and the coating is preferably coated in the presence of a catalyst. And contains a filler that reacts with the hydrogenated silicone oil. And the use of a hydrogenated functional oil reacted as a functional release agent prevents offset by applying a silicone coating on the exposed high energy surface of the oxidized or high filler siloxane fusing roll. Advantages of the weld members of the present invention include preventing or minimizing offset, improving weld latitude, reducing offset from the foam prior to printing, having high thermal conductivity, and having high surface energy, which is usually undesirable. This involves providing a siloxane release surface in those areas of the silicon coating that have poor release properties. In an embodiment, the release coating of the present invention can be obtained by combining a hydride functional siloxane with the active functional groups of the filler component, thereby forming a low surface energy silicone surface on the filler. The fusing member of the present invention can be selected for many known electrophotographic imaging and printing processes, but as described herein, the filler is used alone and does not react with the silicone hydride release oil. It has many advantages, such as eliminating or minimizing the offset that may occur. Component types, such as rolls, to which the coatings of the present invention can be applied are described, for example, in U.S. Patent Nos. 4,373,239 and 4,518,655, the disclosures of which are incorporated by reference in their entirety. Part of the text.
[0002]
[Prior art]
Several methods have been described in the prior art for heat fusing of electroscopic toner images. These methods include devices that heat and press at substantially the same time by various means, such as a set of rolls in press contact and a belt member in press contact with the rolls. Heating is performed by heating one or both rolls, plate members or belt members. Fusing of the toner occurs when a suitable combination of heating, pressing and contact time is performed.
[0003]
During operation of the fusing system, heat is applied to heat and fuse the toner particles to the support, and both the toner image and the support pass through a nip formed between a set of rolls, plates or belt members. . Simultaneous heat transfer and pressurization during the nip affects the fusing of the toner image to the support. In the fusing process, it is important that the toner particles transfer from the support to the fusing member without offset during normal operation. The offset of the toner into the fusing member continues to be transferred onto other parts of the machine or onto the support in subsequent copying cycles, thereby darkening the ground color and hindering the copied material. This is referred to as "hot offset" and occurs when the temperature of the toner rises and the toner particles dissolve, and during the fusing operation the dissolved toner separates and a portion remains on the fusing member. The hot offset temperature or a decrease in the hot offset temperature is a measure of the release performance of the fusing roll, and thus the fusing surface needs to have a low surface energy to achieve the required effective release. In order to ensure and maintain good peeling performance of the welding roll, it is common practice to apply a release agent to the welding member so that the toner is reliably peeled off the welding roll during the welding operation. Typically, these materials are applied as a thin film, for example, of silicone oil to prevent toner offset.
[0004]
The disclosures of U.S. Pat. Nos. 4,264,181, 4,257,699 and 4,272,179 are commonly attributed to the assignee of the present application and are not disclosed. The contents of which are incorporated herein by reference in their entirety, but relate to welding members and certain release agents. These patents describe a specific welding member and a method of welding an image of a thermoplastic resin toner to a substrate, wherein a certain polymeric release agent having a functional group is applied to the surface of the welding member. ing. The welded member includes a substrate member having an elastomeric surface containing a metal-containing filler, which has been cured with an additional nucleophilic vulcanizing agent. An example of such a welded member is an aluminum substrate member having a poly (vinylidene fluoride-hexafluoropropylene) copolymer cured with a bisphenol vulcanizing agent in which a lead oxide filler is dispersed, and the mercapto-modified polyorganosiloxane oil is stripped. Used as an agent. In these welding processes, the polymer release agent has a functional group designed as a chemically reactive functional group, and binds to the metal-containing filler dispersed in the elastomer or resinous material on the surface of the welding member. Therefore, a thermally stable film is formed. Further, the film peels off the thermoplastic resin toner and prevents the thermoplastic resin toner from directly contacting the elastomeric material itself. Metal oxides, metal salts, alloys or other suitable metal compound fillers are dispersed in the elastomer or resin on the surface of the welded member and are bonded to the functional groups of the siloxane polymer release agent. Preferably, the metal-containing filler material does not degrade or adversely affect the functionalized polymeric release agent. This reaction of elastomers with metal-containing fillers and polymeric release agents with functional groups can provide excellent release and high quality reproduction products, even in high speed electrostatographic copiers. it can. In these VITON® / lead oxide or Viton® / copper oxide components, the low volume fraction of the oxide allows for reaction with the unique functional release agent, thereby It is added to enable coating of a silicone polymer oil such as polysiloxane.
[0005]
U.S. Pat. Nos. 4,029,827, 4,101,686 and 4,185,140, all of which are normally attributed to the assignee of the present application. The description in U.S. Pat. No. 4,029,827 is the use of a polyluganosiloxane having a mercapto functionality as a release agent. U.S. Pat. Nos. 4,101,686 and 4,185,140 disclose release fluids having functional groups such as carboxy, hydroxy, epoxy, amino, isocyanate, thioether and mercapto groups. And a polymer release agent.
[0006]
[Problems to be solved by the invention]
In accordance with embodiments of the present invention, there is provided a welded member, more particularly a silicone welded member comprising a filler such as a metal oxide, wherein the filler reacts with a hydrogenated silicone oil.
[0007]
In an embodiment of the present invention, there is provided a silicone rubber welding roll wherein the hydrogenated functional groups contained in the silicone release agent react with the metal oxide filler present in the silicone rubber coating of the welding roll.
[0008]
In certain embodiments, the present invention provides an improved silicone fusing roll by reacting a silicone release oil or the like having a hydrogenated functional silicone as a side group at the end with a filler present in the silicone rubber fusing coating. About.
[0009]
It is an object of the present invention to prevent or minimize offset, improve welding latitude, reduce offset from foam before printing, have high thermal conductivity, and have high surface energy, which is usually undesirable. Including providing a siloxane release surface in areas of the silicon coating that have poor release properties.
[0010]
[Means for Solving the Problems]
The welding member according to claim 1 of the present invention is a welding member including a base and a silicone rubber containing a filler component, wherein the filler component reacts with a hydrogenated silicone release oil.
[0011]
The method for improving the peeling property of a welding roll according to claim 2 of the present invention includes providing a reaction product of a hydrogenated silicone release oil and a metal oxide filler to the surface of the welding roll.
[0012]
According to an embodiment of the present invention, the filler is preferably selected in an amount of about 55 to 70% by volume, based on the amount of silicone rubber, and is coated with a hydrogenated silicone oil rather than a polysiloxane oil. Thus, the present invention provides improved fusing roll toner and oil release.
[0013]
Although the mechanisms involved are not completely understood, it has been observed that certain functionalized polymeric fluids can be used to form metal oxides, metal salts, metal alloys or other suitable metal compounds. When applied to the surface of a welding member having a dispersed elastomer surface, an oxide of a filler in an elastomer, a hydroxide, a halide, a polymer fluid having a functional group and a functional group such as a carboxyl compound, etc. Between, interactions, chemical reactions, coordination complexes, hydrogen bonding or other mechanisms may occur. For this reason, it has been achieved that the polymer release agent having a functional group in a liquid state maintains the excellent surface for the release having excellent performance on the surface of the welding roll. However, it is like a film formed on the surface of the elastomer, and is different from the elastomer composition and the polymer release agent composition having a functional group. This film, however, has a greater affinity for the elastomer containing the metal compound than the toner, and thus provides a good release coating on the elastomer surface. The releasable coating is tacky, which is less than the adhesion between the heated toner and the substrate to which the toner adheres and the tackiness of the toner. The interaction of the functional groups of the polymeric release agent with the filler in the elastomer results in an overall reduction in the critical or high surface energy of the filler.
[0014]
In a specific example, the welded member has a core, such as a metal, which is typically continuously coated with a thermally conductive, elastic, compressible material that has a high thermomechanical strength, The article comprises alpha, omega, hydroxypolydimethylsiloxane, finely divided tabular alumina, finely divided iron oxide, a cross-linking agent, and a cross-linking catalyst having a number average molecular weight of about 5,000 to about 20,000. The coating may have a varying effective thickness, for example, from about 10 to about 100 mils (about 254 to 2540 μm), and may be a hydrogenated silicone such that the release agent reacts with the metal oxide filler on the fusing roll. A release agent is applied. Examples of welding members selected for the present invention are described in U.S. Pat. No. 4,373,239, the entire disclosure of which is incorporated herein by reference.
[0015]
The present invention in a specific embodiment includes a substrate and a silicone rubber containing a filler component coating the same, the filler component reacting with a hydrogenated silicone release oil, and a base member and an adhesive layer coating the same. A top layer of a polysiloxane silicone rubber coating comprising one or more filler components, wherein the filler components contained therein relate to a welding member that reacts with the hydrogenated silicone release oil.
[0016]
Examples of hydrogenated silicone oils selected for the apparatus of the present invention include, for example, Huls PS123.8, PS124, PS124.5, etc., available from Huls Incorporated, Germany. These hydrogenated functional oils may be selected as is or diluted with a commercially available non-functional release oil such as non-functional polydimethylsiloxane. The concentration of the diluted oil is, for example, from about 0.5 to about 99.5% by weight of the hydrogenated oil, and one preferred composition comprises 15% by weight PS124.5 and 85% by weight nonfunctional oil. % Included. The molecular weight (g / mol) and viscosity (centistokes) of the hydrogenated oil are, for example, from about 5,000 to about 30,000 and about 100 to about 1000 centistokes, respectively, while when a non-functional oil is included, The corresponding values may be about 4000 to about 8000 and about 100 to about 20,000 centistokes, respectively.
[0017]
Examples of fillers include metal oxides, such as oxides of aluminum, iron, silicon, and the like, as described in U.S. Patent No. 4,373,239; and oxides of titanium, zinc, copper, and silicon; The content is, for example, about 5 to about 50% by volume. The description of the aforementioned U.S. patents is incorporated herein by reference in its entirety.
[0018]
Examples of crosslinker compounds are present in various effective amounts, such as from about 1 to about 15% by weight, and include orthosilicic acid, esters of polysilicic acid, alkyl tris, as described in U.S. Patent No. 4,373,239. The description of the aforementioned U.S. Patents, including alkoxysilanes, is incorporated herein by reference in its entirety.
[0019]
Examples of catalysts include amines as described in U.S. Pat. No. 4,373,239, carboxylate salts of metals such as lead, zirconium, antimony, iron, calcium, tin, barium, cadmium, and the like, and platinum chloride. The description of the aforementioned U.S. patents, including acids, is incorporated herein by reference in its entirety. Examples of particularly preferred catalysts include dibutyltin dilaurate and dibutyltin diacetate, such as 0.1 to 0.2 parts per 100 parts of a polymer such as alpha, omega-hydrogenated polydimethylpolysiloxane. Effective amounts.
[0020]
Another embodiment of the present invention is a welding system of the type wherein a polymeric release agent having a functional group is located on the surface of the welding member, wherein the welding member for welding the thermoplastic resin toner image is an underlying support. The component includes a thermally conductive silicone elastomer layer having a filler such as a metal oxide thereon, wherein the filler included in the layer causes a reaction with the silicone oil containing one or more SiH functional groups.
[0021]
In another embodiment of the present invention, the siloxane or silicone oil has the formula:
[0022]
Embedded image

[0023]
The welded members of the present invention are thus available from a base layer of a metal such as aluminum and from the well-known Emerson Corning S11, Dow Corning 1200, Dow Corning 6060, Union Carbide. An undercoat adhesive layer, such as a known adhesive such as an organofunctional silane, and a top surface layer of siloxane, wherein the filler contained in such a layer reacts with the hydrogenated silicone oil as described herein. It is possible.
[0024]
An exemplary fusing roll of the present invention is described in the context of a fusing assembly having a multi-layer fusing roll, which in turn comprises a substrate support member, a relatively thick silicone elastomer layer thereon, an aminosilane subbing layer, The adhesive layer comprises a metal oxide filler layer dispersed in a silicone elastomer layer, wherein the filler reacts with a silicone oil having one or more SiH functional groups. The substrate support member is typically a hollow cylinder or core, but has a suitable heating element in the hollow portion, the heating element being coextensive with the cylinder. The backup or pressure roll is operated simultaneously with the fusing roll, which forms a fusing nip or contact arc therethrough such that copy paper or other support contacts the toner image with the fusing roll's elastomeric fusing surface. I do. The backup roll has a hard steel core with a thin layer of Teflon (TEFLON: registered trademark of EI DuPont de Nemours, Inc.) surface 24 on the surface. The sump contains a polymeric release agent having a functional group. The release agent has SiH functional groups and reacts as described herein to form an intermediate barrier layer between the weld surface and the toner. Two release agent supply rolls are arranged to supply the polymeric release agent from the sump to the surface. The two release agent supply rolls are rotatably mounted and transport the release agent from the sump to the welding surface of the elastomer. One roll is partially immersed in the sump and transfers the release agent on its surface from the sump to a supply roll. By using a metering blade, a layer of polymeric release fluid is first applied to the supply roll, and subsequently to the welding surface of the elastomer, with a controlled thickness in the range of submicron to several microns thickness of release fluid. Can be supplied. Accordingly, the metering device can provide a layer of release fluid of about 0.1 to about 2 μm or more in thickness to the surface of the weld surface of the elastomer.
[0025]
The metal oxide filler particles may have an irregular shape, but metal oxide of any shape such as powder, small plate, spherical, fibrous, and oblong particles should be used for the welding surface. Can be. The substrate support member may be selected from any suitable material. Typically, it may be selected from aluminum, alumite, steel, nickel, copper and the like. In one embodiment, it is an aluminum tube or, alternatively, an aluminum sprayed steel tube.
[0026]
In accordance with the present invention, the multilayer welded member has achieved a dramatic improvement in offset properties, such as substantially eliminating image sticking.
[0027]
Any suitable thermally conductive silicone elastomer rubber layer can be employed for the substrate. Typically made from peroxide-curable polyorganosiloxanes, commonly known as high temperature vulcanizations (HTVs), which typically have pendant vinyl groups as shown in the following formula: Polydimethylsiloxanes.
[0028]
Embedded image

[0029]
The trifluoropropyl, cyanopropyl, phenyl and vinyl groups included are typically substituted with some of the methyl groups to impart curing, mechanical or chemical properties to the silicone rubber. The introduction of phenyl groups reduces the elasticity of the vulcanizate and improves tensile and tear strength. Phenyl groups reduce vulcanization rates. The trifluoropropyl group improves solvent resistance. Introducing a low proportion of vinyl groups lowers the vulcanization temperature, imparting greater elasticity and lower compression set to the rubber. The peroxide cured rubber may be terminated with vinyldimethylsiloxy. The most commonly used peroxides are benzoyl peroxide and bis (dichlorobenzoyl) peroxide. Dicumyl peroxide can be used for vinyl-containing polymers. Generally, the peroxide added is from 0.2 to 1.0% and the curing takes place at 120 ° C to 140 ° C. In addition, other peroxides, such as 2,5-dimethyl-2,5-bis (t-butylperoxy) hexane, can be used to crosslink HTVs at temperatures above 180 ° C.
[0030]
Typically, a layer of HTV is applied to the core material by molding or extrusion to a thickness of about 1 mm to about 3 mm. It typically cures at a temperature between 120 ° C and 180 ° C for 20 to 30 minutes, depending on the particular peroxide used.
[0031]
Particularly effective adhesives include gamma aminopropyltriethoxysilane. Gamma aminopropyltriethoxysilane is available from Union Carbide under the product name ORGANOFUNCTIONAL SILANE A-1100 (trademark); another suitable material is N- (2-aminoethyl -3-aminopropyl) trimethoxysilane, 6- (aminohexylaminopropyl) trimethoxysilane, p-aminophenyltrimethoxysilane, 3- (1-aminopropoxy) 3,3-dimethyl-1-propenyltrimethoxysilane , 3-aminopropyltris (methoxyethoxyethoxy) silane and N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane.
[0032]
The metal oxide dispersed in the silicone rubber welded coating needs to be capable of reacting with the functional groups of the SiH release oil, reacting, for example, peeling off the thermoplastic toner resin, and filling the toner with a high surface energy filler. To form a thermally stable film that does not come into contact with One preferred metal oxide is aluminum oxide, which is preferably included in an amount of about 60 to 70% by weight of the polymeric component. The particle size of the metal oxide is important and should not be too small for the cure of the polymer to create excessive modulus, nor to be large enough to result in large defects that initiate premature failure of the compound. Typically, the average particle size of the metal oxide is from about 1 to about 75 μm, preferably about 10 μm in diameter.
[0033]
The surface of the welding member of the present invention is preferably a roll, preferably a roll manufactured by casting or molding.
[0034]
The welding member is obtained by molding or extruding an HTV silicone rubber densely filled with conductive filler particles onto an aluminum core whose surface has been degreased and sand-blasted, for example, if desired, using a general-purpose primer. It can be manufactured by priming, subsequent curing, and post-curing.
[0035]
Hereinafter, parts and% represent parts by weight and% by weight, respectively, unless otherwise indicated.
[0036]
【Example】
(Example I: control)
180 g of disilanol, Rhodosursil 48V750 (trade name) from Rhone-Poulenc Company, believed to contain α, ω hydroxypolydimethylsiloxane and having an average viscosity of about 750 centistokes. Of α, ω hydroxypolydimethylsiloxane, and was mixed with Rhodolsyl 48V3500 ™ having an average viscosity of about 3500 centistokes. The mixture is believed to be a disilanol having a number average molecular weight of about 15,000. The mixture was placed in a Baker Perkins Model AN2 mixer equipped with a thermostatically controlled electric heater. To this mixture, 1284 g of Alcoa T61 TABULAR ALUMINA ™, 325 mesh, was added over about 10 minutes. Thereafter, 150.6 g of Mapico Red 297 (Trade Mark), iron oxide with a final particle size of about 0.4 μm, are added to the mixture over 10 minutes and the mixture is allowed to stand at room temperature for about 2.5 μm. Mix for hours. To this mixture was added 45 g of SILBOND ™ high-concentration ethyl silicate from Stuffer Chemical Company, and mixing was continued for 1 hour. To this mixture, 3 g of dibutyltin dilaurate catalyst was added and the mixture was then placed on an aluminum roll between 60 and 70 mils (1524.03 to 1778.014 μm) in order to test it as a fusing roll. Coated. The roll was brought to a temperature of 158 ° F. (70 ° C.) and cured for 3 hours. The fuser roll was then placed in a xerographic printing press, such as a Xerox Corporation 4850, for oil evaluation. Other welding rolls were prepared and evaluated by the same method. The coated fusing roll was operated at a circumferential roll speed of about 15 inches / sec (38.1 cm / sec) and the stress biased between the fusing roll and the compression roll was 30 pounds / linear inch along the length of the fusing roll. (5.36 kg / cm). The temperature of the fusing roll was maintained at about 335 ° F (168.3 ° C). A 13000 centistoke release agent of non-functional polydimethylsiloxane oil was applied to the fusing roll, and various types of preprinted forms were prepared using 90% styrene-n-butyl methacrylate and REGAL 330® carbon black. It was used as a substrate for welding a toner containing 10%. The ink offset from the incompletely dried preprinted form to the fuser roll was so unclear after about 10 developed copies that the process was unacceptable.
[0037]
(Example II: Comparative product)
The welding roll member of Example I was installed in a 4850 machine manufactured by Xerox Corporation, and a non-functional polysiloxane oil which was a 1075 welding oil manufactured by Xerox Corporation was used as a release oil. The inks used for the pre-print forms were Rochester, NY, no. It is commercially available as LASER JET BLUE (trademark) from Ron Ink Company of 61 Hearstead Street. A preprinted form from this ink that was not dried, observed an offset on the welded surface after 12 passes through the 4850 press. The offset was visually confirmed by observing the welding surface. The preprinted form printed with this ink was dried at 25 ° C. for 52 hours, and then passed 300 passes through the machine, where a slight offset was evident by visual evaluation of the surface of the fusing roll.
[0038]
(Example III: product of the present invention)
Except that the welding roll of Example I was selected as a release oil, a 15:85 mixture of a hydrogenated oil obtained as PS123.8 from Huls, USA and a 1075 welding oil from Xerox was selected. Tested according to the process. The preprinted form using the LaserJet Blue ™ ink showed no ink offset after only 3.5 hours of drying at 25 ° C, and no ink offset without drying.
[0039]
(Example IV: Comparative product)
The fusing roll of Example I was tested according to the process of Example II using 1075 non-functional fusing release agent from Xerox. The foam was printed with PANTON 340-U GREEN ink available from Print Ink Company, Detroit. The printed foam had extensive offsets evident. After drying the foam for 50 hours, there was no ink offset as in Example III.
[0040]
(Example V: product of the present invention)
The process of Example IV was repeated using a 15:85 mixture of hydrogenated oil obtained from Huls, USA as PS123.8 and 1075 weld oil as the functionalized hydrogenated oil. After 9 hours of drying, no offset was observed. And a slight offset was observed without drying.
[0041]
(Example VI: Comparative product)
The process of Example I was repeated on a Xerox 4850 machine using 1075 non-functional welding oil. The foam used there was printed by HR RUBINE RED (trademark) supplied by Printing Ink. The foam, as in Example IV, had widespread offset on the weld surface without drying of the ink. Also, after drying the foam for 50 hours, there was an acceptable ink offset as in Example III.
[0042]
(Example VII: product of the present invention)
The process of Example VI was repeated using a 15:85 mixture of hydrogenated oil obtained as PS123.8 from Huls, USA and 1075 welding oil from Xerox as the functionalized hydrogenated oil. After drying for 28 hours, no offset was observed. And a slight offset was observed without drying.
[0043]
(Example VIII: Comparative product)
The process of Example I was repeated on a Xerox 4850 machine using 1075 welding oil. The foam used there was preprinted with Pantone 340-U Green (TM). The foam, as in Example IV, exhibited extensive offsets on the weld surface dried for 350 hours.
[0044]
(Example IX: product of the present invention)
The process of Example VIII was repeated using a 15:85 mixture of hydrogenated oil obtained from Huls of America as PS123.8 and Xerox 1075 welding oil as the functionalized hydrogenated oil. After drying for 170 hours, no offset was observed. And a slight offset was observed without drying.
[0045]
As is apparent from the above examples, for example, when preprinted forms printed with various inks were used to copy on a 4850 machine using standard 1075 welding oil, these forms were not dried. Showed high range offset. To obtain an acceptable level of offset, these foams are usually dried for an extended period of time. No offset or minimal level of offset was observed when using a mixture of hydrogenated oil and 1075 welding oil.
[0046]
【The invention's effect】
Since the welding roll and the method for improving the peeling property of the present invention have the above-mentioned constitution, the excellent effect of facilitating the peeling of the toner from the welding roll, eliminating or minimizing the offset, and improving the welding latitude was exhibited.

Claims (2)

A fuser member for fusing thermoplastic resin toner images, hydrogenated silicone oils are used in the type of welding system applied to the surface of the fuser member, the fuser member includes a substrate, a metal oxide thereon and a silicone rubber layer having things filler, weld member, wherein the metal oxide filler to form a release film which is the reaction product on the surface of the silicone rubber layer reacts with the hydrogen silicone oil . Hydrogenated silicone oil is applied to the surface of a welding roll including a silicone rubber layer having a metal oxide filler to cause a reaction between the hydrogenated silicone oil and the metal oxide filler, thereby causing a reaction on the surface of the silicone rubber layer. A method for improving the release characteristics of a welding roll, comprising forming a release film as a product .