Patent ID: 7603067

Claim:
A rubber member comprising not less than two vulcanized rubber layers including a surface layer and a base layer, wherein said surface layer comprises a composition selected from the group consisting of: (1) epichlorohydrin copolymer, chloroprene rubber, and polyether copolymer; (2) epichlorohydrin copolymer and chloroprene rubber; and (3) epichlorohydrin copolymer and NBR; wherein a hardness of said surface layer is set higher than a hardness of said base layer; said hardness of said base layer is set to not more than 60 degrees in the JIS A hardness; a hardness of a laminate of all layers including said base layer and said surface layer is set to not more than 70 degrees in said JIS A hardness; and an electric resistance value of said laminate is set to not more than 10 10 Ω, when said electric resistance value is measured by applying a voltage of 100V to said laminate at a temperature of 10° C. and a relative humidity of 20%; wherein adjacent layers are integrated with each other without interposing an adhesive agent therebetween or/and said adjacent layers contain an identical rubber component.