Patent ID: 9470991
Filing Date: 2016-10-18
CPC Classification: G03G

Claim Text:
1. A method for producing a positively chargeable toner, the method comprising: melt-kneading a toner raw material composition comprising a resin binder, a positively chargeable charge control agent, and fine fluororesin particles, and a recycled powder, thereby obtaining a melt-kneaded mixture; cooling the melt-kneaded mixture obtained in the melt kneading, and pulverizing a cooled mixture, thereby obtaining a pulverized product; and classifying the pulverized product obtained in the cooling and pulverizing, wherein the recycled powder is a powder removed in the classifying, wherein the amount of the recycled powder melt-kneaded with the toner raw material composition in the melt-kneading is 1.5 parts by mass or more, based on 100 parts by mass of the resin binder in the toner raw material composition, and wherein the resin binder in the toner raw material composition comprises 50% by mass or more of a polyester having a softening point of 125° C. or higher and 170° C. or lower, wherein the content of the fine fluororesin particles in the toner raw material composition in the melt-kneading is 0.3 parts by mass or more and 4.5 parts by mass or less, based on 100 parts by mass of the resin binder in the toner raw material composition, and wherein a content of the fine fluororesin particles in the recycled powder in the melt-kneading is from 1.5 parts to 50 parts, based on 100 parts by mass of the fine fluororesin particles in the toner raw material composition.