トナー、現像剤、補給用現像剤、トナー収容ユニット、画像形成装置および画像形成方法

Title:

トナー、現像剤、補給用現像剤、トナー収容ユニット、画像形成装置および画像形成方法

Document Type and Number:

Japanese Patent JP7225800

Kind Code:

B2

Abstract:

A toner comprising a binder resin is provided. When the toner is observed with an atomic force microscope in tapping mode to obtain a phase image and the phase image is binarized with an intermediate value between maximum and minimum phase difference values in the phase image to obtain a binarized image, the binarized image consists of first phase-contrast portions having a large phase difference and second phase-contrast portions having a small phase difference, where the first phase-contrast portions are dispersed in the second phase-contrast portions and a dispersion diameter of the first phase-contrast portions is in a range of from 150 to 500 nm. The toner has at least two glass transition temperatures (Tg) in respective ranges of from 40° C. to 65° C. and from −30° C. to 20° C., determined from a DSC curve obtained at a first temperature rise in a differential scanning calorimetric measurement by a midpoint method.

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Inventors:

Taichi Nemoto
Takebayashi Touma

Application Number:

JP2018247091A

Publication Date:

February 21, 2023

Filing Date:

December 28, 2018

Export Citation:

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Assignee:

株式会社リコー

International Classes:

G03G9/087

Domestic Patent References:

JP7230187A
JP2013152461A
JP2011257744A
JP2013054178A

Attorney, Agent or Firm:

Chieko Tateno

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