Patent ID: 10088795

Abstract:
There is provided a cleaning blade including an elastic member and a supporting member, in which a free end of the elastic member has an edge and a hardened surface constituting the edge. The cleaning blade satisfies a relationship of 0.10≤DHs≤0.40 and DHs≥DHm where DHs (mN/μm2) represents a dynamic hardness of the hardened surface and DHm (mN/μm2) represents a maximum value of a dynamic hardness obtained in a positional range in which a distance L from the edge on a straight line that bisect an angle of the edge satisfies 0 μm<L≤200 μm and in AFM-IR spectrum of the hardened surface, peak intensity ν C═O free (1724 to 1736 cm−1) derived from a urethane group and peak intensity ν C═O bond (1708 to 1720 cm−1) derived from a urethane group hydrogen bond has a specific relationship.