Patent ID: 8129085
Filing Date: 2012-03-06
Classification: G03G

Abstract:
1. A method of manufacturing a toner comprising: a preliminarily mixing step of mixing at least binder resin and colorant into a mixture; a melt-kneading step of melt-kneading the mixture into a melt-kneaded product; a pulverizing step of pulverizing the melt-kneaded product into a pulverized product; a classifying step of classifying the pulverized product into a large-sized toner particle group of particles and a small-sized toner particle group of particles having a volume average particle size smaller than that of the large-sized toner particle group of particles; a spheronizing step of treating the small-sized toner particle group of particles with a spheronization process; a mixing step of mixing the large-sized toner particle group of particles not treated with a spheronization process and the small-sized toner particle group of particles treated with a spheronization process; wherein the toner comprising toner particles containing at least binder resin and colorant, the toner particles including the large-sized toner particle group of particles and the small-sized toner particle group of particles having a volume average particle size smaller than that of the large-sized toner particle group of particles, wherein a volume average particle size D a content of toner particles contained in a toner particle group having a volume average particle size of 7 μm or more is 24% by volume or more and 47% by volume or less based on the entire toner particles, and a content of toner particles contained in a toner particle group having a number average particle size of 5 μm or less is 10% by number or more and 50% by number or less based on the entire toner particles.