Electroconductive rubber roller
First Claim
1. An electroconductive rubber roller having an outermost rubber layer made of a rubber composition containing an ionic-conductive rubber as a main component thereof,wherein the surface of said outermost rubber layer comprises an oxide film formed by oxidation of the outermost rubber layer by irradiating with ultraviolet rays and/or ozone;
- and said rubber composition contains a dielectric loss tangent-adjusting filler to set a dielectric loss tangent of said electroconductive rubber roller to 0.1 to 1.5.
1 Assignment
0 Petitions
Accused Products
Abstract
An electroconductive rubber roller (10) whose outermost layer consists of a rubber layer (1) made of a rubber composition containing an ionic-conductive rubber as a main component thereof. The surface of the rubber layer consists of an oxide film; and the rubber composition contains a dielectric loss tangent-adjusting filler to set a dielectric loss tangent of the electroconductive rubber roller to 0.1 to 1.5. Weak electroconductive carbon black and/or calcium carbonate treated with fatty acid can be used as the dielectric loss tangent-adjusting filler.
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Citations
17 Claims
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1. An electroconductive rubber roller having an outermost rubber layer made of a rubber composition containing an ionic-conductive rubber as a main component thereof,
wherein the surface of said outermost rubber layer comprises an oxide film formed by oxidation of the outermost rubber layer by irradiating with ultraviolet rays and/or ozone; - and said rubber composition contains a dielectric loss tangent-adjusting filler to set a dielectric loss tangent of said electroconductive rubber roller to 0.1 to 1.5.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An electroconductive rubber roller which is used as a development roller used for single-component toner and having an outermost rubber layer made of a rubber composition containing an ionic-conductive rubber as a main component thereof,
wherein said rubber layer has a thickness of 0.5 mm to 10 mm and a surface of said outermost rubber layer comprises an oxide film formed by oxidation of the outermost rubber; - and said rubber composition contains a dielectric loss tangent-adjusting filler to set a dielectric loss tangent of said electroconductive rubber roller to 0.1 to 1.5.
Specification