Toner
US-2017248856-A1 · Aug 31, 2017 · US
Magnetic carrier
US9046800B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9046800-B2 |
| Application number | US-201214114610-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 25, 2012 |
| Priority date | May 12, 2011 |
| Publication date | Jun 2, 2015 |
| Grant date | Jun 2, 2015 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
Provided is the following magnetic carrier. The magnetic carrier maintains high developing performance even when the number of sheets to be output is large. Its charge-providing performance hardly reduces even when toner or an external additive is spent on the magnetic carrier. In addition, the magnetic carrier is strong in resistance against standing. The magnetic carrier includes a magnetic carrier core and a resinous coating layer formed on a surface of the magnetic carrier core, in which the resinous coating layer contains a resin composition and silica-alumina composite particles.
First claim
Opening claim text (preview).
The invention claimed is: 1. A magnetic carrier, comprising: a magnetic carrier core; and a resinous coating layer formed on a surface of the magnetic carrier core, wherein the resinous coating layer contains a resin composition and silica-alumina composite particles, and wherein the silica-alumina composite particles have a dielectric dissipation factor at 1,000 Hz of 0.02 or more and 1.00 or less. 2. The magnetic carrier according to claim 1 , wherein a content of alumina in the silica-alumina composite particles is 5.0 mass % or more and 50.0 mass % or less. 3. The magnetic carrier according to claim 1 , wherein a crystallinity of alumina in the silica-alumina composite particles is 1.0% or more and 60.0% or less. 4. The magnetic carrier according to claim 1 , wherein the silica-alumina composite particles are produced by a gas phase method.
Assignees
Inventors
Classifications
- G03G9/0839Primary
Treatment of the magnetic components; Combination of the magnetic components with non-magnetic materials (G03G9/0834 takes precedence) · CPC title
- G03G9/1132Primary
Macromolecular components of coatings · CPC title
Inorganic components of coatings · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9046800B2 cover?
- Provided is the following magnetic carrier. The magnetic carrier maintains high developing performance even when the number of sheets to be output is large. Its charge-providing performance hardly reduces even when toner or an external additive is spent on the magnetic carrier. In addition, the magnetic carrier is strong in resistance against standing. The magnetic carrier includes a magnetic c…
- Who is the assignee on this patent?
- Hotta Yojiro, Okamoto Naoki, Terauchi Kazuo, and 3 more
- What technology area does this patent fall under?
- Primary CPC classification G03G9/0839. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jun 02 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).