Canon Kabushiki Kaisha

Yuna Yamamoto

Takashi Matsui

Kenji Aoki

Shohei Shibahara

Tsutomu Shimano

Takashi Kenmoku

Takayuki Toyoda

Masashi Kawamura

Tsuneyoshi Tominaga

Yu Yoshida

Taku Shimoda

Noritaka Toyoizumi

Kenji Ookubo

Mariko Yamashita

A toner comprises a toner particle comprising a resin A and a resin B, wherein the resin A has a structure represented by a predetermined general formula, and the resin B has a monomer unit represented by a predetermined general formula, and a toner manufacturing method comprises a step of dispersing a toner base particle comprising the resin B in an aqueous medium to obtain a toner slurry, and a step of adding a radical polymerization initiator and a monomer composition comprising a monomer represented by a predetermined general formula to the resulting toner slurry to form the resin A on a surface of the toner base particle.

Toner and method for manufacturing toner

A toner contains a toner particle containing a resin component and a wax. The resin component contains a vinyl polymer A having a monomer unit A represented by the formula (A): In a luminance histogram created from STEM observation, the total pixel value C in luminance 0 to 9 and the total pixel value A in luminance 0 to 245 satisfy 0.000≤C/A≤0.250. When the pixel value in luminance 10 to 245 has a maximum value P at luminance X, luminance M-luminance N ranges from 120 to 235, wherein the luminance M denotes a luminance at which the pixel value falls below 20% of P for the first time from the luminance X to 245, and the luminance N denotes a luminance at which the pixel value falls below 20% of the P for the first time from the luminance X to 10.

Toner and method for producing toner

A toner comprising a toner particle comprising a binder resin and an azo dye, wherein the binder resin comprises a polymer A, the polymer A is a polymer having a monomer unit derived from methacrylonitrile, and a relationship among an amount of substance (mol) of the monomer unit derived from methacrylonitrile, an amount of substance (mol) of the azo dye, and the number of azo groups in the azo dye in the toner particle satisfies formula below:[(amount of substance of azo dye (mol))&#xd7;(number of azo groups in azo dye)/(amount of substance of monomer unit derived from methacrylonitrile (mol))]&#x2264;0.500.

Toner

Growing community of inventors

Shizuoka, Japan

Yuna Yamamoto