TONER

摘要

Provided is a toner satisfying low-temperature fixing performance and long-term storage stability of fixed images. Further, provided is a toner capable of obtaining toner images excellent in long-term storage stability irrespective of use environments even in the case where images are formed by a high-speed fixing system having low internal pressure of a fixing nip of a fixing device and a high printing speed. The toner includes toner particles containing a binder resin having a resin A and B, and a coloring agent, in which the resin A includes a resin including a moiety capable of forming a crystalline structure; the resin B includes a resin free of a moiety capable of forming a crystalline structure; and ΔHhigh and ΔHlow satisfy the expressions:;2≦ΔHhigh≦45;3[%]≦{(ΔHlow−ΔHhigh)/ΔHlow}×100≦70[%];where ΔHhigh and ΔHlow represent a heat of melting derived from the binder resin measured at a temperature increase speed of 100° C./min and 10° C./min, respectively.

主权项

1. A toner, comprising toner particles, each of which contains a binder resin containing a resin A and a resin B, and a coloring agent,
wherein: (1) the resin A comprises a resin including a moiety capable of forming a crystalline structure; (2) the resin B comprises a resin which is free of any moieties capable of forming a crystalline structure; and (3) in a measurement of an endothermic quantity of the toner by the use of an input compensation type differential scanning calorimeter, ΔHhigh and ΔHlow satisfy the following relationships of Expressions 1 and 2:
2≦ΔHhigh≦45  Expression 13≦{(ΔHlow−ΔHhigh)/ΔHlow}×100≦70  Expression 2where
the ΔHhigh (J/g) represents a heat of melting derived from the binder resin measured at a temperature increase speed of 100° C./min, and the ΔHlow (J/g) represents a heat of melting derived from the binder resin measured at a temperature increase speed of 10° C./min.