DEVELOPMENT ROLLER FOR ELECTROPHOTOGRAPHIC DEVICES

To provide a development roller for electrophotographic devices, which minimizes an increase in charge of toner.SOLUTION: A development roller 10 for electrophotographic devices is provided, comprising a shaft 12, an elastic layer 14 formed around the shaft 12, and a surface layer 16 formed around t...

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Bibliographische Detailangaben
Hauptverfasser:	HORIUCHI TAKESHI, FUJII KENGO, EGAWA SHUICHI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BEARINGS BLASTING CINEMATOGRAPHY ELECTROGRAPHY ELECTROPHOTOGRAPHY ELEMENTS OR CRANKSHAFT MECHANISMS ENGINEERING ELEMENTS AND UNITS FLEXIBLE SHAFTS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HOLOGRAPHY LIGHTING MAGNETOGRAPHY MECHANICAL ENGINEERING PHOTOGRAPHY PHYSICS ROTARY BODIES OTHER THAN GEARING ELEMENTS SHAFTS THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	To provide a development roller for electrophotographic devices, which minimizes an increase in charge of toner.SOLUTION: A development roller 10 for electrophotographic devices is provided, comprising a shaft 12, an elastic layer 14 formed around the shaft 12, and a surface layer 16 formed around the elastic layer 14, the surface layer 16 containing (a) through (c) below: (a) a binder made of acrylonitrile-butadiene rubber having an acrylonitrile content of 30 mass% or more (b) an ionic conductive agent consisting at least one salt selected from phosphonium salts and pyridinium salts, and (c) a charge control agent made of an acrylic polymer having a silicone group, or fluorine-containing group, and a cationic group.SELECTED DRAWING: Figure 1 【課題】トナーの荷電上昇が抑えられる電子写真機器用現像ロールを提供する。【解決手段】軸体１２と、軸体１２の外周に形成された弾性体層１４と、弾性体層１４の外周に形成された表層１６と、を備え、表層１６が、下記の（ａ）〜（ｃ）を含有する電子写真機器用現像ロール１０とする。（ａ）アクリロニトリル量が３０質量％以上であるアクリロニトリル−ブタジエンゴムからなるバインダー（ｂ）ホスホニウム塩およびピリジニウム塩から選択される少なくとも１種からなるイオン導電剤（ｃ）シリコーン基またはフッ素含有基と、カチオン基と、を有するアクリル系重合体からなる荷電制御剤【選択図】図１