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Title:
TONER AND IMAGE FORMING METHOD
Document Type and Number:
Japanese Patent JP2020034901
Kind Code:
A
Abstract:
To provide a toner which exhibits superior transferability and is less likely to contaminate charging rollers.SOLUTION: A toner provided herein comprises toner particles containing a binder resin, inorganic fine particles A, and silica particles B, the inorganic fine particles A having a cuboid particle shape. Content of the inorganic fine particles A with respect to 100 pts.mass of the toner particles is 0.3-3.0 pts.mass. Primary particles of the silica particles B has a number average particle diameter of 80-200 nm. The inorganic fine particles A have a fixing rate of 25-70%. Defining YA (mg) as an amount of separated inorganic fine particles A and YB (mg) as an amount of separated silica particles B as observed when the toner is centrifuged in a sucrose solution, YA is 3.00 to 18.0 and YA and YB satisfy the following expression (1): YA/YB>0.75 ...(1). A rubbing test using the inorganic fine particles A and the binder resin produces a surface potential difference in a range of -70 V to +70 V.SELECTED DRAWING: None

Inventors:
MURAYAMA RYUJI
SHIBATA TAKAO
TAMURA JUNICHI
MANSHO KENTA
SHIINO MOE
MINAGAWA HIRONORI
Application Number:
JP2019144703A
Publication Date:
March 05, 2020
Filing Date:
August 06, 2019
Export Citation:
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Assignee:
CANON KK
International Classes:
G03G9/097; G03G9/087
Attorney, Agent or Firm:
Hidewa Patent Office



 
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