Toner

US8846284B2 · kind B2 · utility

Assignee

• Canon Kabushiki Kaisha · JP

Inventors

• Tetsuya Kinumatsu · Shizuoka, JP
• Atsushi Tani · Fukuoka, JP
• Kenji Aoki · Tokyo, JP
• Shuntaro Watanabe · Yokohama, JP
• Takaaki Kaya · Soma, JP
• Ayako Okamoto · Wako, JP
• Yoshihiro Nakagawa · Numazu, JP
• Toshifumi Mori · Tokyo, JP
• Takashige Kasuya · Numazu, JP

Key dates

• Filing date: Jan 14, 2013
• Grant date: Sep 30, 2014
• Expiry date: Jan 14, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G9/09392
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Provided is a toner comprising toner particles, wherein each of the toner particles has a core-shell structure composed of a core and a shell phase formed on the core, the shell phase contains a resin (B), and the core contains a binder resin (A), a colorant and a wax, wherein the toner particles contain the resin (B) in a specific amount with respect to the core, and wherein the solubility parameter (SP value) of the binder resin (A) is denoted by SP(A), the SP value of the resin (B) is denoted by SP(B), the SP value of a repeating unit with the smallest SP value from among repeating units constituting the resin (B) is denoted by SP(C), and the SP value of the wax is denoted by SP(W), each of the SP(A), SP(B), SP(C) and SP(W) satisfy specific relationships.