Invention Grant
- Patent Title: Toner
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Application No.: US16815377Application Date: 2020-03-11
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Publication No.: US11112712B2Publication Date: 2021-09-07
- Inventor: Tomonori Matsunaga , Hidekazu Fumita , Noriyoshi Umeda , Shohei Tsuda
- 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: JPJP2019-048540 20190315,JPJP2020-017058 20200204
- Main IPC: G03G9/08
- IPC: G03G9/08 ; G03G9/087 ; G03G9/097 ; G03G9/113

Abstract:
A toner comprising: a toner particle that contains a release agent-containing toner base particle, and an organosilicon polymer on a toner base particle surface, and an external additive A, the organosilicon polymer has a T3 unit structure; the organosilicon polymer forms protruded portions on the toner base particle surface; the number-average value of the protrusion height H is from 30 nm to 300 nm; the ratio of the number-average primary particle diameter R of the external additive A to the number-average value of the protrusion height H is from 1.00 to 4.00; the number-average primary particle diameter R of the external additive A is from 30 nm to 1,200 nm; and, in an image obtained by observing the toner surface with SEM, the area percentage for the bright region area in the image with reference to the total area of the image is from 30.0% to 75.0%.
Public/Granted literature
- US20200292955A1 TONER Public/Granted day:2020-09-17
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