Toner to develop electrostatic latent images

摘要

A toner T1 develops an electrostatic latent image, the toner T1 having relieved charge-up characteristics, improved development characteristics, and improved transfer characteristics. The toner T1 may ensure high charge stability against environmental condition changes, and an appropriate amount of charges at a high printing speed, may reduce background contamination on a photoreceptor, may prevent undesirable fusing onto a blade even after prolonged printing, and may have high transfer efficiency and high image uniformity. The toner T1 may have effective flowability and transportability, and may have good storage stability, so as to be unlikely to cause blocking when stored for an extended time.

主权项

1. A toner T1 to develop an electrostatic latent image, the toner T1 comprising:
a core particle comprising a binder resin, a colorant, and a releasing agent, and an external additive adhering to an external surface of the core particle, the external additive comprising a silica particle, an anatase titanium dioxide particle, a rutile titanium dioxide particle, and a strontium titanium oxide particle, wherein the core particle comprises an agglomerated core toner particle of a first aggregated particle from a first binder resin latex mixture of approximately 95 wt % of a low molecular weight binder resin latex having a weight average molecular weight of approximately 25,000 g/mol and a glass transition temperature of approximately 62° C., and approximately 5 wt % of a high molecular weight binder resin latex having a weight average molecular weight of approximately 250,000 g/mol and a glass transition temperature of approximately 53° C., the first aggregated particle having a particle size of from approximately 1.5 μm to approximately 2.5 μm, the first aggregated particle being combined with a second binder resin latex mixture of approximately 90 wt % of the low molecular weight binder resin latex having the weight average molecular weight of approximately 25,000 g/mol and the glass transition temperature of approximately 62° C., and approximately 10 wt % of the high molecular weight binder resin latex having the weight average molecular weight of approximately 250,000 g/mol and the glass transition temperature of approximately 53° C., so that the core particle has a potato shape with a size of approximately 6.5 urn to approximately 7.0 μm.