CLEANING BLADE, METHOD FOR MANUFACTURING CLEANING BLADE, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS

摘要

The present invention relates to a urethane rubber cleaning blade. A surface of a contact portion of the cleaning blade contacting a member to be cleaned has Young′s modulus (Y0) of 10 mgf/μm^2 to 400 mgf/μm^2. A ration (Y50/Y0) of Young′s modulus (Y50) of the inside of the cleaning blade spaced apart from the surface of the contact portion by 50 μm to the young′s modulus (Y0) is 05 or less. An average variation rate of the Young′s modulus from the surface to the inside of the cleaning blade spaced apart from the surface by 20 μm is larger than or equal to an average variation rate of the Young′s modulus from the inside of the cleaning blade spaced apart from the surface by 20 μm to the inside of the cleaning blade spaced apart from the surface by 50 μm.