| 摘要 |
A cleaning blade member for use in a cleaning section for removing toner on a toner-deposited body, the cleaning blade member comprising: an edge layer contacting the toner-deposited body; and a back layer provided on a back side of the edge layer, and wherein the edge layer has a Young's modulus of 8 to 20 MPa and an impact resilience at 25° C. of 20 to 40%, and when the Young's modulus of the edge layer is designated as E<SUB>a</SUB>, a Young's modulus of the back layer is designated as E<SUB>b</SUB>, a thickness of the edge layer is designated as T<SUB>a</SUB>, and a thickness of the back layer is designated as T<SUB>b</SUB>, a ratio (R<SUB>b</SUB>/R<SUB>a</SUB>) between a contribution rate R<SUB>a </SUB>of the Young's modulus of the edge layer represented by the following equation (1), and a contribution rate R<SUB>b </SUB>of the Young's modulus of the back layer represented by the following equation (2) is 0.01 to 6.0, and a total Young's modulus (R<SUB>a</SUB>+R<SUB>b</SUB>) of the edge layer and the back layer is 7 to 14 MPa: <?in-line-formulae description="In-line Formulae" end="lead"?>R<SUB>a</SUB>=[T<SUB>a</SUB>E<SUB>a</SUB>/(T<SUB>a</SUB>+T<SUB>b</SUB>)] (1)<?in-line-formulae description="In-line Formulae" end="tail"?> <?in-line-formulae description="In-line Formulae" end="lead"?>R<SUB>b</SUB>=[T<SUB>b</SUB>E<SUB>b</SUB>/(T<SUB>a</SUB>+T<SUB>b</SUB>)]. (2)<?in-line-formulae description="In-line Formulae" end="tail"?>
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