| abstract |
The present invention provides a cleaning blade member comprising a polyurethane formed by using a polyol consisting essentially of a polycarbonatediol, a polyisocyanate, and a crosslinking agent containing a short chain diol and a triol, the polyurethane having a tensile strength at 60 DEG C. of 200 kg/cm<2 > or higher, and a tensile strength retention DeltaT, represented by the following equation, of 40% or more: DeltaT(%)=T60/T10x100, where T10 denotes a tensile strength at 10 DEG C., and T60 denotes the tensile strength at 60 DEG C. |