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1. WO2016147635 - MAGNETIC CARRIER

Publication Number WO/2016/147635
Publication Date 22.09.2016
International Application No. PCT/JP2016/001393
International Filing Date 11.03.2016
IPC
G03G 9/113 2006.01
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
9Developers
08with toner particles
10characterised by carrier particles
113having coatings applied thereto
CPC
G03G 15/09
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
15Apparatus for electrographic processes using a charge pattern
06for developing
08using a solid developer, e.g. powder developer
09using magnetic brush
G03G 15/0928
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
15Apparatus for electrographic processes using a charge pattern
06for developing
08using a solid developer, e.g. powder developer
09using magnetic brush
0921Details concerning the magnetic brush roller structure, e.g. magnet configuration
0928relating to the shell, e.g. structure, composition
G03G 9/107
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
9Developers
08with toner particles
10characterised by carrier particles
107having magnetic components
G03G 9/1133
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
9Developers
08with toner particles
10characterised by carrier particles
113having coatings applied thereto
1132Macromolecular components of coatings
1133obtained by reactions only involving carbon-to-carbon unsaturated bonds
G03G 9/1139
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
9Developers
08with toner particles
10characterised by carrier particles
113having coatings applied thereto
1139Inorganic components of coatings
Applicants
  • キヤノン株式会社 CANON KABUSHIKI KAISHA [JP]/[JP]
Inventors
  • 菅原 庸好 SUGAHARA, Nobuyoshi
  • 小野▲崎▼ 裕斗 ONOZAKI, Yuto
  • 皆川 浩範 MINAGAWA, Hironori
  • 飯田 育 IIDA, Wakashi
Agents
  • 岡部 讓 OKABE, Yuzuru
Priority Data
2015-05047413.03.2015JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) MAGNETIC CARRIER
(FR) SUPPORT MAGNÉTIQUE
(JA) 磁性キャリア
Abstract
(EN)
Provided is a magnetic carrier which is capable of suppressing decrease in the electric charge amount in a high temperature high humidity environment and increase in the electric charge amount in a room temperature low humidity environment, while being capable of outputting a stable image when the environment changes. A magnetic carrier which comprises a magnetic carrier core and a resin coating layer that is formed on the surface of the magnetic carrier core, and wherein: the resin coating layer contains a resin component and inorganic fine particles; the inorganic fine particles contain an oxide of a typical metal element or a carbonate of a typical metal element; the inorganic fine particles have a water adsorption rate of 25.0% by mass or less after being left to stand for 72 hours in an environment at a temperature of 30°C at a humidity of 80%; the inorganic fine particles have an electrical conductivity of from 2.0 × 10-9 μS/m to 2.5 × 10-5 μS/m (inclusive); and the inorganic fine particles have a crystallinity of 60% or less.
(FR)
L'invention concerne un support magnétique qui permet de supprimer une diminution de la quantité de charge électrique dans un environnement à haute température et à humidité élevée et une augmentation de la quantité de charge électrique dans un environnement à température ambiante et à humidité faible, tout en permettant de délivrer une image stable lorsque l'environnement change. L'invention concerne un support magnétique qui comprend un noyau de support magnétique et une couche de revêtement de résine qui est formée sur la surface du noyau de support magnétique. Ladite couche de revêtement de résine contient un constituant résine et de fines particules inorganiques ; les fines particules inorganiques contiennent un oxyde d'un élément métallique typique ou un carbonate d'un élément métallique typique ; les fines particules inorganiques présentent un taux d'adsorption d'eau inférieur ou égal à 25,0 % en masse après avoir été laissées au repos pendant 72 heures dans un environnement à une température de 30 °C et à une humidité de 80 % ; les fines particules inorganiques présentent une conductivité électrique allant de 2,0 × 10-9 μS/m à 2,5 × 10-5 μS/m (inclus) ; et les fines particules inorganiques présentent une cristallinité inférieure ou égale à 60 %.
(JA)
高温高湿環境下での帯電量低下、常温低湿環境下での帯電量上昇を抑え、かつ環境変動時に安定した画像を出力することができる磁性キャリアを提供する。 磁性キャリアコア及び該磁性キャリアコアの表面に形成された樹脂被覆層を有する磁性キャリアであって、 該樹脂被覆層が、樹脂成分及び無機微粒子を含有し、 該無機微粒子が、典型金属元素の酸化物又は典型金属元素の炭酸塩を含有し、 該無機微粒子の、温度30℃湿度80%の環境下に、72時間放置した際の水分吸着率が、25.0質量%以下であり、 該無機微粒子の電気伝導率が、2.0×10-9μS/m以上2.5×10-5μS/m以下であり、 該無機微粒子の結晶化度が、60%以下である。
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