Patent ID: 7943280
Filing Date: 2011-05-17
Classification: G03G

Abstract:
1. A toner, comprising: a colorant; at least one binder resin; and a laminar inorganic mineral in which part or all of the ions present between the layers are modified by organic ions, wherein the laminar inorganic mineral is a bentonite, wherein the toner is prepared by a method comprising dispersing or emulsifying a toner constituent mixture liquid comprising the colorant, at least one member selected from the group consisting of at least one binder resin and at least one precursor of the binder resin, and the laminar inorganic mineral, in an aqueous medium, and wherein the toner has a property such that after it is prepared, a density (A) of the laminar inorganic mineral measured by XPS for the toner surface and a density (B) of the laminar inorganic mineral measured by XPS for the toner surface after the toner has been melted and kneaded at 130° C. for 30 minutes to obtain blocks, satisfies the following relationship: and density is measured in terms of atomic %; and wherein a ratio (Dv/Dn) of a volume average particle diameter (DV) of the toner to a number average particle diameter (Dn) of the toner is from 1.00 to 1.30 and particles of the toner having a circularity not greater than 0.950 make up 20 to 80% of all the toner particles.