Magnetic toner
AssigneeCanon Kabushiki Kaisha
InventorsYusuke Hasegawa, Yoshihiro Ogawa, Junko Nishiyama, Miho Okazaki, Takashige Kasuya, Tomohisa Sano
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Abstract
A magnetic toner including at least: a binder resin; and a magnetic body, in which, when magnetization at a magnetic field strength of 397.9 kA/m and a coercive force of the magnetic toner are denoted by σs (Am2/kg) and Hc (kA/m), respectively, a magnetic field strength at which the magnetic toner shows a magnetization value equal to 95% of σs is denoted by H95% (kA/m), and a number average particle size of the magnetic body is denoted by d (μm), H95%, Hc, and d satisfy the following expressions. 151<H95%<200 (1) 7.1<Hc<12 (2) 40<Hc/d<150 (3)
Claims4
A magnetic toner comprising at least:
- a binder resin;
- and
- a magnetic body having thereon a high-density coating layer of at least one of SiO2, TiO2 or Al2O3,
- wherein the magnetic body comprises spherical particles,
- and wherein, when magnetization at a magnetic field strength of 397.9 kA/m and a coercive force of the magnetic toner are denoted by σs (Am2/kg) and Hc (kA/m), respectively, a magnetic field strength at which the magnetic toner shows a magnetization value equal to 95% of σs is denoted by H95% (kA/m), and a number average particle size of the magnetic body is denoted by d (μm), H95%, Hc, and d satisfy the following expressions
- 151<H95%<200 (1)
- 7.1<Hc<12 (2)
- 40<Hc/d<150 (3)
Dependencies are inferred from the claim text.