Electroconductive roll
An electroconductive roll includes a core member, a rubber base material disposed around the core member, and a surface layer disposed around the rubber base material. The arithmetic mean peak curvature S pc of a surface of the surface layer is equal to or greater than 1,880 (1/mm), and is equal to or less than 14,024 (1/mm).
1. An electroconductive roll comprising:
a core member;
a rubber base material disposed around the core member; and
a surface layer disposed around the rubber base material,
an arithmetic mean peak curvature S pc of a surface of the surface layer being equal to or greater than 1,880 (1/mm) and being equal to or less than 14,024 (1/mm).
2. The electroconductive roll according to claim 1 , wherein the surface layer comprises an electroconductive matrix comprising a base material formed of an electric insulator and an electroconductive material being dispersed in the base material, and particles of a surface roughness enhancing material being dispersed in the electroconductive matrix.
3. The electroconductive roll according to claim 2 , wherein the particles of the surface roughness enhancing material are formed of an electric insulator.