TWO-COMPONENT DEVELOPER, DEVELOPER FOR REPLENISHMENT, AND IMAGE FORMING METHOD

Japanese Patent JP2022070703

A

To provide a two-component developer that has satisfactory followability to an environmental change and durability, and even in an environment in which the developer is used at high temperature and high humidity and then left to stand and subsequently printing is performed at normal temperature and low humidity, can prevent a variation in hue and stably obtain a high-definition image.SOLUTION: A two-component developer includes toner and magnetic carrier. The toner is a toner having a toner particle, and silica fine particles A present on the surface of the toner particle. The number average particle diameter of primary particles of the silica fine particles A is 80 nm or more and 200 nm or less. After 1800 seconds from when the silica fine particles A are electrified in an environment of a temperature of 23°C and a relative humidity of 50%, the silica fine particles A have a charge attenuation constant α of 0.0005 or more and 0.0100 or less. The magnetic carrier is a magnetic carrier having a magnetic carrier particle having a resin coating layer. The resin coating layer contains a resin including a constitutional unit derived from a (meth)acrylate compound. The resin coating layer contains a phosphorus element or a sulfur element.SELECTED DRAWING: None

MATSUO RYUICHIRO
HOSOI KAZUTO
TSUJIMOTO DAISUKE
SAKAMOTO KAZUYUKI
KOBORI NAOKUNI

JP2020179914A

May 13, 2022

October 27, 2020

Click for automatic bibliography generation  

CANON KK

G03G9/113; G03G9/097

Okabe
Takao Ochi
Koji Yoshizawa
Masami Saito

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