Patent ID: 7435519
Filing Date: 2008-10-14
Classification: G03G

Abstract:
1. An electrophotographic toner comprising at least a fixing resin, a coloring agent, a release agent and a charge control agent, wherein the release agent is carnauba wax, the charge control agent is a boron complex of a salicylic acid derivative, and the fixing resin contains two different polyester resins producing a ratio represented by the following equation (1); wherein in the above equation, A(T 1/2 )−A(T fb )<B(T 1/2 )−B(T fb ), A(T 1/2 ) represents a softening point (° C.) of the polyester A, A(T fb ) a flow-out start point (° C.) of the polyester A, B(T 1/2 ) a softening point (° C.) of the polyester B, B(T fb ) a flow-out start point (° C.) of the polyester B, C a weight rate of the polyester A in the fixing resin, and D a weight rate of the polyester B in the fixing resin; wherein the electrostatic quantity of the electrophotographic toner by friction charging is within a range of −10 to −25 μc/g.