Toner

摘要

A toner is prepared by wet granulation methods, including a monoester wax having carbon atoms of from 36 to 46 on average as a release agent. The toner has a DSC endothermic energy amount (ΔH1) originating from the wax of from 10 to 12 mJ/mg and a DSC endothermic energy amount (ΔH2) originating from the wax of from 0.6 to 0.9 times as much as ΔH1 after a part of the wax is separated by hexane extraction from the toner. The hexane extraction includes mixing 1 g of the toner in 7 ml of n-hexane to prepare a mixture; stirring the mixture at 120 rpm for 1 min by a pot mill to prepare a dispersion; and subjecting the dispersion to suction filtration.

主权项

1. A toner, comprising:
6 to 10% by weight of a monoester wax having carbon atoms of from 36 to 46 on average as a release agent, a base, and an inorganic particulate material, wherein the toner has a DSC endothermic energy amount (ΔH1) originating from the wax of from 10 to 12 mJ/mg and a DSC endothermic energy amount (ΔH2) originating from the wax of from 0.6 to 0.9 times as much as ΔH1 when a part of the wax is separated by hexane extraction from the toner, and wherein the hexane extraction comprises: mixing 1 g of the toner in 7 ml of n-hexane to prepare a mixture; stirring the mixture at 120 rpm for 1 min by a pot mill to prepare a dispersion; and subjecting the dispersion to suction filtration, wherein the base comprises:
a main part comprising a resin, the release agent and a colorant, anda convex part formed of a particulate resin, overlying the main part, wherein the toner has a sea-island structure where the main part is a sea and the convex part is an island, the resin comprises a first resin, and the particulate resin is different from the first resin, and wherein the toner is prepared by a process comprising wet granulation.