TONER FOR ELECTROSTATIC CHARGE IMAGE DEVELOPMENT, ELECTROSTATIC CHARGE IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD

To provide a toner for electrostatic charge image development that prevents fogging occurring when images are repeatedly formed.SOLUTION: A toner for electrostatic charge image development has: toner particles; and silica particles that are externally added to the toner particle, the silica particle...

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Main Authors ZENITANI YUKA, TAKEUCHI SAKAE, MOCHIDA MAI, ERI YOSHIFUMI, TAKAGI SHIMPEI, SASAKI KOJI
Format Patent
LanguageEnglish
Japanese
Published 05.04.2023
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:To provide a toner for electrostatic charge image development that prevents fogging occurring when images are repeatedly formed.SOLUTION: A toner for electrostatic charge image development has: toner particles; and silica particles that are externally added to the toner particle, the silica particles including a nitrogen element-containing compound, in which when the volumes of pores having a pore diameter of 1 nm or more and 50 nm or less determined from the pore distribution curve of the nitrogen gas adsorption method before and after calcination at 350°C are defined as A and B, respectively, B/A is 1.2 or more and 5 or less, and B is 0.2 cm3/g or more and 3 cm3/g or less.SELECTED DRAWING: None 【課題】繰り返し画像を形成したときに生じるかぶりが抑制される静電荷像現像用トナーを提供すること。【解決手段】トナー粒子と、前記トナー粒子に外添されるシリカ粒子であって、窒素元素含有化合物を含み、３５０℃焼成前後における窒素ガス吸着法の細孔分布曲線から求める細孔直径１ｎｍ以上５０ｎｍ以下の細孔体積を各々Ａ及びＢとしたとき、Ｂ／Ａが１．２以上５以下であり、かつＢが０．２ｃｍ３／ｇ以上３ｃｍ３／ｇ以下であるシリカ粒子と、を有する静電荷像現像用トナーである。【選択図】なし
Bibliography:Application Number: JP20210156201