Patent ID: 9535350
Date: 2017-01-03
CPC Classifications: G03G

Claim:
1. A method for producing ground toner, the toner including: a binder resin; a coloring agent; a release agent; and a charge control agent, the method comprising the steps of: (a) selecting and mixing (i) the binder resin, (ii) an additive resin having a weight average molecular weight smaller than a weight average molecular weight of the binder resin, (iii) the coloring agent, (iv) the release agent, and (v) the charge control agent so that the toner has a weight average molecular weight Mw of 30,000≦Mw≦95,263 as determined from a molecular weight distribution based on gel permeation chromatography (GPC), that the toner includes a tetrahydrofuran-insoluble gel component at a weight proportion of less than 5%, and that the toner includes components each having a molecular weight of 500 to 1500 which components have an area occupancy of 4% to 10% on a chart of the molecular weight distribution based on GPC; (b) fusing and kneading a mixture resulting from the step (a); and (c) grinding a fused and kneaded product resulting from the step (b).