Charging roller, and method of producing the same
AssigneeSumitomo Rubber Industries, Ltd.
InventorDaijiro Suzuki
Life of this patent
Estimating the term…
Abstract
An inventive charging roller (1) includes a roller body (2) which is formed of a crosslinked product of a rubber composition containing a rubber component including 30 to 70 parts by mass of GECO, 15 to 60 parts by mass of IR and not less than 1 part by mass of SBR and/or NBR based on 100 parts by mass of the overall rubber component and has an outer peripheral surface (5) finished in a finish-polished surface. An inventive production method includes the steps of: forming a roller body (2) from the crosslinked product of the rubber composition described above; and wet-polishing or mirror-polishing an outer peripheral surface (5) of the roller body (2) into a finish-polished surface.
Claims7
A charging roller comprising a roller body having an outer peripheral surface finished in a finish-polished surface,
- wherein the roller body has a surface portion including the finish-polished surface, and at least the surface portion comprises a crosslinked product of a rubber composition containing a rubber component,
- wherein the rubber component comprises, based on 100 parts by mass of the overall rubber component:
- (1) not less than 30 parts by mass and not greater than 70 parts by mass of epichlorohydrin-ethylene oxide-allyl glycidyl ether terpolymer rubber;
- (2) not less than 15 parts by mass and not greater than 60 parts by mass of isoprene rubber, wherein the isoprene rubber is a homopolymer;
- and
- (3) not less than 1 part by mass of at least one selected from the group consisting of styrene butadiene rubber and acrylonitrile butadiene rubber.
A charging roller production method for producing a charging roller comprising a roller body, the method comprising the steps of:
- forming at least a surface portion of the roller body from a crosslinked product of a rubber composition containing a rubber component;
- and
- wet-polishing or mirror-polishing an outer peripheral surface of the roller body into a finish-polished surface;
- wherein the rubber component comprises, based on 100 parts by mass of the overall rubber component:
- (1) not less than 30 parts by mass and not greater than 70 parts by mass of epichlorohydrin-ethylene oxide-allyl glycidyl ether terpolymer rubber;
- (2) not less than 15 parts by mass and not greater than 60 parts by mass of isoprene rubber, wherein the isoprene rubber is a homopolymer;
- and
- (3) not less than 1 part by mass of at least one selected from the group consisting of styrene butadiene rubber and acrylonitrile butadiene rubber.
Dependencies are inferred from the claim text.