CLEANING BLADE, METHOD FOR MANUFACTURING THE SAME AND METHOD FOR CLEANING IMAGE FORMING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a cleaning blade excellent in wear resistance even when used for cleaning an image forming apparatus using a polymer toner, and to provide a method for manufacturing the same and a cleaning method. SOLUTION: The cleaning blade comprises a polyurethane elastic body and is used in an image forming apparatus applying an electrostatic transfer process, wherein the polyurethane elastic body has, as constituents, a bifunctional polyol compound (molecular weight Mp, blending quantity Wp), a diisocyanate compound (molecular weight Mi, blending quantity Wi), at least one trifunctional or higher functionality crosslinking agent (molecular weight Mt, blending quantity Wt) and a bifunctional chain extender (molecular weight Md, blending quantity Wd), wherein Mc defined by the expression: Mc=(Wi+Wp+Wt+Wd)/(Wt/Mt) is 2,000