Patent ID: 8642237
Filing Date: 2014-02-04
Classification: G03G

Abstract:
1. A toner comprising toner particles each of which comprises a binder resin, a colorant and wax, wherein the binder resin comprises a resin (a) having 50 percent by mass or more of polyester unit, and wherein, in the measurement of the endothermic amount of the toner by using a differential scanning calorimeter, (1) regarding the endothermic amount derived from the binder resin in the measurement at a temperature raising rate of 10.0° C./min, the peak temperature (T (2) W where W 1 (° C.) represents the half-width of a maximum endothermic peak (P 1 ) regarding the endothermic amount derived from the binder resin in the measurement at a temperature raising rate of 1.0° C./min, and W 20 (° C.) represents the half-width of a maximum endothermic peak (P 20 ) regarding the endothermic amount derived from the binder resin in the measurement at a temperature raising rate of 20.0° C./min, wherein the resin (a) is a block polymer of a resin component (a1) capable of forming a crystalline structure, and a resin component (a2) not forming a crystalline structure that is bonded to the resin component (a1), and wherein the resin (a) comprises 50 percent by mass or more of resin component (a1) capable of forming a crystalline structure.