Invention Grant
- Patent Title: Toner for electrostatic image development and process for preparing the same
- Patent Title (中): 静电图像显影用调色剂及其制备方法
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Application No.: US11430050Application Date: 2006-05-09
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Publication No.: US07955771B2Publication Date: 2011-06-07
- Inventor: Keiichi Kikawa , Yasuhiro Shibai , Yoritaka Tsubaki
- Applicant: Keiichi Kikawa , Yasuhiro Shibai , Yoritaka Tsubaki
- Applicant Address: JP Osaka
- Assignee: Sharp Kabushiki Kaisha
- Current Assignee: Sharp Kabushiki Kaisha
- Current Assignee Address: JP Osaka
- Agency: Nixon & Vanderhye P.C.
- Priority: JP2005-141481 20050513
- Main IPC: G03G9/08
- IPC: G03G9/08

Abstract:
A toner for electrostatic image development, comprising an organic pigment and a binding resin, and satisfying the formula (I): 1−R/A≦0.014C (I), wherein A represents an entire area of a graph (x-axis: wavelength of a visible radiation region (380 to 780 nm), y-axis: transmittance (0 to 100%)) showing a spectral transmittance curve of a supernatant fluid, the supernatant fluid being obtained by subjecting the toner to an extraction process, the extraction process using a supercritical fluid; R represents an area determined by a Rectangular method on the basis of a spectral transmittance curve in the graph; and C represents a concentration (wt %) of the organic pigment in the toner, the organic pigment having a particle diameter of 1/10 to ½ ( 1/10 to 4/7 when the organic pigment is an organic yellow pigment) of a maximum absorption wavelength of the organic pigment, and the toner having a haze of 16 or less.
Public/Granted literature
- US20060257778A1 Toner for electrostatic image development and process for preparing the same Public/Granted day:2006-11-16
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