| 摘要 |
The present invention provides a cleaning blade for cleaning a surface of an object to be cleaned, comprising: a contact portion that contacts the surface of the object for cleaning, the contact portion being made of a material satisfying the following inequalities (1) to (3): 3.92 0<alpha S>=250 (3) wherein M denotes 100% modulus (MPa); alpha denotes the ratio {Deltastress/Deltastrain degree=(stress at 200% strain degree-stress at 100% strain degree)/(200-100)} (MPa/%) of the stress alteration (Deltastress) to the strain alteration (Deltastrain) in a range of 100% to 200% strain degree in the stress-strain curve; and S denotes the breaking elongation (%), and a cleaning apparatus, a process cartridge, and an image forming apparatus comprising the cleaning blade.
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