Toner
AssigneeCanon Kabushiki Kaisha
InventorsHiroyuki Fujikawa, Kunihiko Nakamura, Nozomu Komatsu, Kosuke Fukudome, Yoshiaki Shiotari, Takayuki Itakura
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Abstract
A toner having toner particles, each of which contains a binder resin, a wax and inorganic fine particles, wherein the inorganic fine particles are fixed at the surface of the toner particles as a result of a surface treatment by hot air, and the degree of uneven distribution of wax in the toner is controlled in a depth direction of the toner, from the toner surface towards a toner central portion.
Claims7
A toner comprising toner particles, each of the toner particles comprising a polyester binder resin, a hydrocarbon wax and a colorant, with inorganic fine particles being melt-fixed at the surface of the toner particles, wherein
- the toner satisfies formula (1):
- 1.20≦P1/P2≦2.00 (1)
- where P1=Pa/Pb and P2=Pc/Pd,
- Pa is an intensity of the highest absorption peak in a range from 2843 cm−1 to 2853 cm−1 in an FT-IR spectrum obtained by an attenuated total reflectance (ATR) method by using Ge as the ATR crystal and under the condition of an infrared light-incidence angle of 45°,
- Pb is an intensity of the highest absorption peak in a range from 1713 cm−1 to 1723 cm−1 in an FT-IR spectrum obtained by an attenuated total reflectance (ATR) method by using Ge as the ATR crystal and under the condition of an infrared light-incidence angle of 45°,
- Pc is an intensity of the highest absorption peak in a range from 2843 cm−1 to 2853 cm−1 in an FT-IR spectrum obtained by an attenuated total reflectance (ATR) method by using KRS5 as the ATR crystal and under the condition of an infrared light-incidence angle of 45°, and
- Pd is an intensity of the highest absorption peak in a range from 1713 cm−1 to 1723 cm−1 in an FT-IR spectrum obtained by an attenuated total reflectance (ATR) method by using KRS5 as the ATR crystal and under the condition of an infrared light-incidence angle of 45°.
A method of producing a toner comprising steps of,
- melt-kneading a polyester binder resin, a hydrocarbon wax and a colorant to obtain a resin composition,
- pulverizing the resin composition to obtain particles to be treated,
- dispersing inorganic fine particles on the surface of the particles to be treated, and
- conducting a surface treatment by hot air to the particles to be treated having the inorganic fine particles dispersed thereon, thereby melt-fixing the inorganic fine particles to the surface of the particles to be treated to obtain toner particles,
- the toner comprising toner particles, each of the toner particles comprising the polyester binder resin, the hydrocarbon wax and the colorant, with the inorganic fine particles being melt-fixed at the surface of the toner particles, wherein
- the toner satisfies formula (1):
- 1.20≦P1/P2≦2.00 (1)
- where P1=Pa/Pb and P2=Pc/Pd,
- Pa is an intensity of the highest absorption peak in a range from 2843 cm−1 to 2853 cm−1 in an FT-IR spectrum obtained by an attenuated total reflectance (ATR) method by using Ge as the ATR crystal and under the condition of an infrared light-incidence angle of 45°,
- Pb is an intensity of the highest absorption peak in a range from 1713 cm−1 to 1723 cm−1 in an FT-IR spectrum obtained by an attenuated total reflectance (ATR) method by using Ge as the ATR crystal and under the condition of an infrared light-incidence angle of 45°,
- Pc is an intensity of the highest absorption peak in a range from 2843 cm−1 to 2853 cm−1 in an FT-IR spectrum obtained by an attenuated total reflectance (ATR) method by using KRS5 as the ATR crystal and under the condition of an infrared light-incidence angle of 45°, and
- Pd is an intensity of the highest absorption peak in a range from 1713 cm−1 to 1723 cm−1 in an FT-IR spectrum obtained by an attenuated total reflectance (ATR) method by using KRS5 as the ATR crystal and under the condition of an infrared light-incidence angle of 45°.
Dependencies are inferred from the claim text.