Patent ID: 9625842
Date: 2017-04-18
CPC Classifications: G03G

Claim:
1. A toner comprising: toner particles comprising a styrene binder resin, and a release agent comprising a monoester or diester compound, with inorganic fine particles comprising metal oxide fine particles present on the surface of the toner particles, the metal oxide fine particles comprising silica fine particles, and optionally comprising titania and alumina fine particles, a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica, titania and alumina fine particles, wherein when a coverage ratio A (%) is a coverage ratio of the toner particles' surface by the inorganic fine particles and a coverage ratio B (%) is a coverage ratio of the toner particles' surface by the inorganic fine particles that are fixed on the toner particles' surface, the toner has a coverage ratio A of 45.0% to 70.0% and a ratio B/A is from 0.50 to 0.85, and the toner has a softening temperature (Ts) from 60.0° C. to 75.0° C. and a softening point (Tm) from 120.0° C. to 150.0° C. measured with a constant-load extrusion-type capillary rheometer.