TONER, DEVELOPER, AND IMAGE FORMING APPARATUS

摘要

A toner, containing: toner base particles; and an external additive, the toner base particles each including a binder resin and a releasing agent, wherein the external additive includes non-spherical coalesced particles in each of which primary particles are coalesced together, and wherein the coalesced particles satisfy the following formula (1): Nx/1,000×100≦30% where Nx is a number of the primary particles present alone relative to 1,000 of the coalesced particles, as observed under a scanning electron microscope after stirring 0.5 g of the coalesced particles and 49.5 g of a carrier placed in a 50 mL bottle for 10 minutes by means of a mixing and stirring device at 67 Hz.

主权项

1. A toner comprising:
toner base particles; and an external additive, the toner base particles each comprising a binder resin and a releasing agent, wherein the external additive comprises non-spherical coalesced particles in each of which primary particles are coalesced together, and wherein the coalesced particles satisfy the following formula (1):Nx1,000×100≤30%Formula(1) where Nx is a number of the primary particles present alone relative to 1,000 of the coalesced particles, as observed under a scanning electron microscope after stirring 0.5 g of the coalesced particles and 49.5 g of a carrier placed in a 50 mL bottle for 10 minutes by means of a mixing and stirring device at 67 Hz.