TONER, DEVELOPING DEVICE, AND PROCESS CARTRIDGE

摘要

A toner is provided. The toner includes toner particles each including a binder resin and a release agent. From 20% to 80% by number of the toner particles satisfy the following formulae (1) and (2):;2/3≦T/Dv≦1.5   (1);1/3≦R/Dv≦1.0   (2);wherein Dv represents a volume average particle diameter of the toner particles; and T and R represent the longest cross-sectional diameters of each toner particle and the release agent contained therein, respectively, measured by observing cross-sections of the toner particles with scanning transmission electron microscope.

主权项

1. A toner, comprising:
toner particles, each toner particle comprising:
a binder resin; anda release agent, wherein a first amount of the toner particles satisfy formula (1) and a second amount of the toner particles satisfy formula (2) and a ratio of the second amount of toner particles to the first amount of toner particles is from 20% to 80% by number:
2/3≦T/Dv≦1.5   (1)1/3≦R/Dv≦1.0   (2) wherein Dv represents a volume average particle diameter of the toner particles; and T and R represent the longest cross-sectional diameters of each toner particle and the release agent contained therein, respectively, measured by observing cross-sections of the toner particles with scanning transmission electron microscope.