Patent ID: 9128398
Filing Date: 2015-09-08
Classification: G03G

Abstract:
1. A toner for forming an electrophotographic image, wherein said toner comprises at least the following four binder resins: a crystalline polyester resin (A); a non-crystalline resin (B); a non-crystalline resin (C); and a composite resin (D) which comprises a condensation polymerization resin unit and an addition polymerization resin unit, wherein the non-crystalline resin (B) is present in the toner in an amount of 10-40% by mass relative to the total mass of the toner, is different from non-crystalline resin (C), and comprises a chloroform insoluble matter, wherein the non-crystalline resin (C) is present in the toner in an amount of 50-90% by mass relative to the total mass of the toner, is different from non-crystalline resin (B), and has a softening temperature (T½) lower than that of the non-crystalline resin (B) by 25° C. or more, and wherein the toner has a main peak between 1,000 to 10,000 in a molecular weight distribution obtained by GPC from a tetrahydrofuran soluble matter, and the toner has a half-value width of the molecular weight distribution of 15,000 or less.