Electrostatic charge image developing toner
US10234778B2 · kind B2 · utility
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14Claims
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Key dates
| Filing date | Sep 8, 2017 |
| Grant date | Mar 19, 2019 |
| Priority date | — |
| Expiry date | Oct 26, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09725
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrostatic charge image developing toner includes toner particles including a particulate toner matrix and an external additive adhering to a surface of the particulate toner matrix. The particulate toner matrix includes a crystalline polyester resin. The external additive includes silica particles. The silica particles are secondary particles including primary particles having a diameter in the range of 30 to 90 nm. The secondary particles have an average circularity in the range of 0.25 to 0.50. The secondary particles have an average aspect ratio of 3.0 or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.