Magnetic toner
A magnetic toner comprising a magnetic toner particle including a binder resin, a magnetic body and a crystalline polyester, wherein the dielectric loss tangent at 100 kHz is 1.0 × 10-2or more, a variation coefficient CV3 of an occupied area ratio of the magnetic body when a cross section of the mag...
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| Zusammenfassung: | A magnetic toner comprising a magnetic toner particle including a binder resin, a magnetic body and a crystalline polyester, wherein the dielectric loss tangent at 100 kHz is 1.0 × 10-2or more, a variation coefficient CV3 of an occupied area ratio of the magnetic body when a cross section of the magnetic toner particle is divided by a square grid having a side of 0.8 µm in cross-sectional observation of the magnetic toner particle using a transmission electron microscope TEM is from 30.0% to 80.0%,, and where a storage elastic modulus of the magnetic toner at 40°C is taken as E'(40) [Pa] and a storage elastic modulus of the magnetic toner at 85°C is taken as E'(85) [Pa], the following formulas (1) and (2) are satisfied:Eʹ85≤5.5×109Eʹ40−Eʹ85×100/Eʹ40≥30 |
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