Patent ID: 8592117
Filing Date: 2013-11-26
Classification: G03G

Abstract:
1. A toner comprising: a binder resin component; a crystal nucleating agent; a releasing agent; and a colorant, wherein the binder resin component contains a crystalline polyester resin and a non-crystalline polyester resin, wherein the crystalline polyester resin has a melting point of 60° C. or higher but lower than 80° C., wherein the crystal nucleating agent is at least one selected from the group consisting of an aliphatic ester compound having a melting point of 60° C. or higher but lower than 120° C. and an aliphatic amide compound having a melting point of 60° C. or higher but lower than 120° C., and wherein the toner satisfies the following expressions (I) and (II): where Tp denotes the lowest exothermic peak temperature [° C.] in a range of 0° C. to 200° C. in a differential scanning calorimetry (DSC) curve obtained through DSC of the crystalline polyester resin, Tc denotes the lowest exothermic peak temperature [° C.] in a range of 0° C. to 200° C. in a DSC curve obtained through DSC of the crystal nucleating agent, and Tm denotes the lowest exothermic peak temperature [° C.] in a range of 0° C. to 200° C. in a DSC curve obtained through DSC of the mixture of the crystalline polyester resin and the crystal nucleating agent, wherein the toner is obtained by a method comprising: dispersing, in an aqueous medium, an oil phase containing the binder resin component, the crystal nucleating agent, the releasing agent and the colorant in an organic solvent, to prepare a dispersion liquid; and removing the organic solvent from the dispersion liquid.