Patent ID: 7610007
Filing Date: 2009-10-27
Classification: G03G

Abstract:
1. 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), the material of the contact portion being an elastomer material containing a hard segment and a soft segment, and the hard segment containing a polyurethane resin: wherein M denotes 100% modulus (MPa); α denotes the ratio {Δstress/Δstrain degree=(stress at 200% strain degree−stress at 100% strain degree)/(200−100)} (MPa/%) of the stress alteration (Δstress) to the strain alteration (Δstrain) in a range of 100% to 200% strain degree in the stress-strain curve; S denotes the breaking elongation (%); and a glass transition temperature of the contact portion is 10° C. or lower.