Patent ID: 7805103
Filing Date: 2010-09-28
Classification: G03G

Abstract:
1. 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 and R b is defined by formula (2): E the overall Young's modulus of the cleaning layer and the elastic layer as defined by (R