Electrophotography toner
AssigneeSamsung Electronics Co., Ltd.
InventorsHae-ree JOO, Tae-hoe KOO, Se-young YOON, Seung-jun LEE
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Abstract
Main performances of a toner are significantly affected by a shape and surface characteristics of toner particles. Using an external additive may be a factor that complicates control of surface characteristics of the toner particles, and anti-offset properties of toner change according to a wax and a binder composition at a surface portion of the toner particles. Provided is a toner usable in electrophotography, wherein the toner has improved durability, fixability, charging stability, and cleaning properties through an appropriate distribution of a binder, a wax, and an external additive on a surface portion of toner particles.
Claims2
A toner to develop an electrostatic image, the toner comprising:
- a core particle comprising a binder resin, a colorant, and a releasing agent;
- a shell layer that surrounds the core particle and comprises a binder resin;
- and
- an external additive that is attached on a surface of the shell layer and comprises silica particles and titanium dioxide particles,
- wherein the core particle and the shell layer further comprise iron, the toner satisfying 0.7≦P2848/P1493≦1.10 and 0.60≦TSI[Fe]/TSI[C3H7]≦1.10, where P2848 and P1493 are each respectively peak intensities in a diffuse reflectance FT-IR spectrum of the toner at locations of 2848 cm−1 and 1493 cm−1, and TSI[Fe] and TSI[C3H7] are each respectively peak intensities in a TOF-SIMS spectrum of the toner corresponding to Fe and C3H7.
Dependencies are inferred from the claim text.