Patent ID: 7496325

Claim:
A cleaning blade, for cleaning toner on a surface of a photoreceptor of an image-forming apparatus, which is formed by molding into a thin plate a thermosetting elastomer composition containing: a rubber component ( 1 ) consisting of a moderate high-nitrile acrylonitrile-butadiene rubber having a bound acrylonitrile amount of 31% to 36%, a hydrogenated acrylonitrile-butadiene rubber having a residual double bond content of not more than 10%, or a mixture of said rubbers, 0.1 parts by mass to 80 parts by mass of a filler ( 2 ) per 100 parts by mass of said rubber component ( 1 ), and 0.1 parts by mass to 30 parts by mass of a crosslinking agent ( 3 ) per 100 parts by mass of said rubber component ( 1 ), wherein said filler is either a combination of methacrylic acid, carbon black and magnesium oxide or a combination of zinc oxide, carbon black and stearic acid; wherein an initial contact angle of said cleaning blade to said photoreceptor is set to 10° to 50°; and wherein a line pressure of said cleaning blade to be applied to said photoreceptor is set to 0.1 N/cm to 1.5 N/cm.