CHARGING MEMBER AND CHARGING ROLLER

PROBLEM TO BE SOLVED: To provide a charging member capable of stably maintaining electric resistance approximately uniformly for a long period of time without using a dopant such as antimony having a large environmental load. SOLUTION: The charging member is composed of a conductive support (a), a c...

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Hauptverfasser:	NAKATANI NAOHARU, OTAKA TOSHIHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	BEARINGS BLASTING CHEMISTRY CINEMATOGRAPHY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS 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 MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS MAGNETOGRAPHY MECHANICAL ENGINEERING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PHOTOGRAPHY PHYSICS ROTARY BODIES OTHER THAN GEARING ELEMENTS SHAFTS THEIR PREPARATION OR CHEMICAL WORKING-UP THERMAL INSULATION IN GENERAL USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a charging member capable of stably maintaining electric resistance approximately uniformly for a long period of time without using a dopant such as antimony having a large environmental load. SOLUTION: The charging member is composed of a conductive support (a), a conductive elastic layer (b) formed on the support, and at least one layer of coating layer formed outside the conductive elastic layer, and is characterized in that: the coating layer (c) at the outermost surface contains a resin and conductive particles; the resin is obtained by reacting a polyol with an isocyanate; the conductive particles are conductive tin oxide particles containing phosphorus and contains 1.3 to 6.6 mass% of phosphorus in terms of P2O5with respect to 100 mass% of tin oxide particles in terms of SnO2; and the electric resistance of the charging member ranges from 1×104to 1×108Ω in an environment at 15 to 30°C and 10 to 80% relative humidity. COPYRIGHT: (C)2011,JPO&INPIT