| 摘要 |
PROBLEM TO BE SOLVED: To provide a toner excellent in low-temperature fixability and capable of preventing a burning phenomenon in which the entire surface of a development roller is covered with a toner constituent.SOLUTION: In a toner including a binder resin containing an amorphous polyester resin and a crystalline polyester resin, and an external additive, the amorphous polyester resin is an amorphous polyester resin obtained by condensation polymerization of a dicarboxylic acid monomer containing terephthalic acid or isophthalic acid as a main component with a diol monomer containing ethylene glycol as a main component; the crystalline polyester resin is a crystalline polyester resin obtained by condensation polymerization of a dicarboxylic acid monomer containing as a main component an aliphatic dicarboxylic acid having 9 to 22 carbon atoms with a diol monomer containing as a main component an aliphatic diol having 2 to 10 carbon atoms; and the external additive contains large particle size silica microparticles having a primary particle size of 75 nm to 220 nm and having a hydrophobizing treatment performed thereon.SELECTED DRAWING: None |
