Patent ID: 7805103

Claim:
A cleaning blade member for removing toner deposited on an object, the cleaning blade member comprising: a cleaning layer which contacts the object, and an elastic layer provided on the back surface of the cleaning layer, wherein, the cleaning layer is formed of a polyurethane member produced through curing and molding a castable polyurethane composition comprising a long-chain polyol, a polyisocyanate, and a diamino compound having a melting point of 80° C. or lower, the elastic layer is formed of a polyurethane member produced through curing and molding a castable polyurethane composition comprising a long-chain polyol, a polyisocyanate, a short-chain diol, and a short-chain triol, the polyisocyanate being contained in an amount of 20 to 45 parts by mass with respect to 100 parts by mass of the polyol, and a ratio of the amount by mole of the short-chain triol to the total amount by mole of the short-chain diol and the short chain triol being 0.4 or higher, and has a percent edge drooping of 7.0% or less, the cleaning layer has a Young's modulus contribution factor (R a ), and the elastic layer has a Young's modulus contribution factor (R b ), with the ratio (R b /R a ) being 0.05 to 6.0, wherein R a is defined by formula (1): R a =[T a E a /( T a +T b )] (1), and R b is defined by formula (2): R b =[T b E b /( T a +T b )] (2), E a represents the Young's modulus of the cleaning layer; E b represents the Young's modulus of the elastic layer; T a represents the thickness of the cleaning layer; and T b represents the thickness of the elastic layer, and the overall Young's modulus of the cleaning layer and the elastic layer as defined by (R a +R b ) is 5.0 to 14.0 MPa.