Invention Grant
- Patent Title: Toner
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Application No.: US16701265Application Date: 2019-12-03
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Publication No.: US10935902B2Publication Date: 2021-03-02
- Inventor: Ichiro Kanno , Nozomu Komatsu , Yuto Onozaki , Takakuni Kobori , Kazuyuki Sakamoto , Ryo Nakajima , Hiroyuki Fujikawa
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: CANON KABUSHIKI KAISHA
- Current Assignee: CANON KABUSHIKI KAISHA
- Current Assignee Address: JP Tokyo
- Agency: Venable LLP
- Priority: JP2018-228294 20181205
- Main IPC: G03G9/08
- IPC: G03G9/08 ; G03G9/097 ; G03G9/087

Abstract:
A toner including a toner particle that includes a binder resin and a crystalline polyester; and inorganic fine particles on the toner particle surface, wherein a content of the crystalline polyester is 0.5 to 20.0 mass parts per 100 mass parts of the binder resin; in the toner cross section, domains of the crystalline polyester are present in a dispersed state, the percentage for areas of these crystalline polyester domains in the region to a depth of 0.50 μm from a contour of the toner particle is at least 10%, the number average of lengths of a major axis is 120 nm to 1000 nm, and the number average of aspect ratios is not more than 4; a dielectric constant of the inorganic fine particles is 25 to 300 pF/m; and a coverage ratio by the inorganic fine particles on the toner particle surface is 5% to 60%.
Public/Granted literature
- US20200183295A1 TONER Public/Granted day:2020-06-11
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