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Title:
ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, IMAGE-FORMING DEVICE AND IMAGE-FORMING METHOD
Document Type and Number:
WIPO Patent Application WO/2023/048289
Kind Code:
A1
Abstract:
An electrostatic charge image developing toner which contains toner particles containing a binding resin, wherein: D1(90), D50(90), D1(150) and D50(150) are each 0.5-2.5, inclusive, if the loss tangent tanδ at a strain of 1% and a temperature of 90°C is D1(90), the loss tangent tanδ at a strain of 50% and a temperature of 90°C is D50(90), the loss tangent tanδ at a strain of 1% and a temperature of 150°C is D1(150), and the loss tangent tanδ at a strain of 50% and a temperature of 150°C is D50(150) when measuring the dynamic viscoelasticity of the electrostatic charge image developing toner; the value of D50(150)-D1(150) is less than 1.5; the value of D50(90)-D1(90) is less than 1.0; the toner particles also contain resin particles; and the number-average molecular weight of the tetrahydrofuran soluble portion in the toner particles is 5,000-15,000, inclusive.

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Inventors:
SAKAMOTO SHINYA (JP)
IWASE MASAKI (JP)
TANAKA YUMI (JP)
Application Number:
PCT/JP2022/035776
Publication Date:
March 30, 2023
Filing Date:
September 26, 2022
Export Citation:
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Assignee:
FUJIFILM BUSINESS INNOVATION CORP (JP)
International Classes:
G03G9/08; G03G9/087
Foreign References:
JP2007065079A2007-03-15
JP2021117422A2021-08-10
JP2018084678A2018-05-31
JP2013160886A2013-08-19
JP2001305794A2001-11-02
US20130224642A12013-08-29
JP2020042122A2020-03-19
JP2020106685A2020-07-09
JP2020042121A2020-03-19
JP2019144368A2019-08-29
JP2013160886A2013-08-19
JP2011237793A2011-11-24
JP2011237792A2011-11-24
JP2021157169A2021-10-07
JP2022145659A2022-10-04
Other References:
JOURNAL OF THE ADHESION SOCIETY OF JAPAN, vol. 29, no. 5, 1993
Attorney, Agent or Firm:
KOH-EI PATENT FIRM, P.C. (JP)
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