| 摘要 |
PROBLEM TO BE SOLVED: To maintain high surface resistance of an electrifying member and to prevent leaking of charges by forming a surface layer composed of an alcohol-soluble copolymer nylon resin and conductive carbon in such a manner that the carbon content is higher near the elastic layer and decreases with the distance from the elastic layer. SOLUTION: The electrifying roller 1 composed of a 8-ϕcore metal 101 (8mm diameter), an epichlorohydrin rubber elastic layer 102 having 3mm thickness, and a surface layer 103 on the elastic layer. The elastic layer 102 has 1.2×10<8>Ω.cm electric resistance, 42 rubber hardness (according to JISA), and 5.5μm surface roughness Rz. The surface layer 103 is formed by applying a coating liquid around the elastic layer 102, and the thickness of the surface layer 103 after dried is 10μm. The carbon content in the surface layer is higher near the elastic layer, while the carbon content decreases with the distance from the elastic layer.
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