Invention Application
US20160209770A1 TWO-COMPONENT DEVELOPER FOR ELECTROSTATIC LATENT IMAGE DEVELOPMENT
审中-公开
用于静电图像发展的双组分开发
- Patent Title: TWO-COMPONENT DEVELOPER FOR ELECTROSTATIC LATENT IMAGE DEVELOPMENT
- Patent Title (中): 用于静电图像发展的双组分开发
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Application No.: US14991299Application Date: 2016-01-08
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Publication No.: US20160209770A1Publication Date: 2016-07-21
- Inventor: Kosuke NAKAMURA , Satoshi UCHINO , Shinya OBARA
- Applicant: Konica Minolta, Inc.
- Priority: JP2015-008022 20150119
- Main IPC: G03G9/113
- IPC: G03G9/113 ; G03G9/08 ; G03G9/093

Abstract:
A two-component developer for electrostatic latent image development includes: toner particles obtained in such a manner that an external additive is attached to a surface of toner base particles containing at least a binder resin; and carrier particles obtained in such a manner that a surface of core particles is coated with a resin for coating, wherein the toner particles have a volume-average particle size of 3 μm or more and 5 μm or less, the core particles have porosity of 8% or less, and the carrier particles have a volume-average particle size of 15 μm or more and 30 μm or less, volume resistivity of 1×108 Ω·cm or more and 1×1010 Ω·cm or less, a true specific gravity of 4.25 g/cm3 or more and 5 g/cm3 or less, and a shape factor SF-1 of 105 or more and 125 or less.
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