Patent ID: 7817956

Claim:
A cleaning blade, for use in an image-forming apparatus, which is brought into contact with a peripheral surface of a photoreceptor drum of an image-forming apparatus to remove toner which remains on said peripheral surface of said photoreceptor drum, said cleaning blade being molded from a thermosetting elastomer composition containing a rubber component ( 1 ), a filler ( 2 ), and a crosslinking agent ( 3 ), said thermosetting elastomer composition essentially containing 5 to 60 parts by mass of zinc methacrylate ( 2 a ) or 5 to 60 parts by mass of a mixture ( 2 a ) of methacrylic acid and zinc oxide as said filler ( 2 ) for 100 parts by mass of said rubber component ( 1 ) or said thermosetting elastomer composition containing 10 to 75 parts by mass of a mixture ( 1 a ) of hydrogenated acrylonitrile-butadiene rubber serving as a base polymer thereof and said zinc methacrylate dispersed in said hydrogenated acrylonitrile-butadiene rubber in 100 parts by mass of said rubber component ( 1 ), wherein in a dynamic state in which said cleaning blade contacts said photoreceptor drum with a load of 2 to 60 N and a face pressure of 1.3 to 66.7 MPa being applied thereto when said photoreceptor drum is rotating, said cleaning blade contacts said peripheral surface of said photoreceptor drum in a contact width (nip width) of 3 to 10μm.