JP2008292830A5 - - Google Patents
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- Publication number
- JP2008292830A5 JP2008292830A5 JP2007139299A JP2007139299A JP2008292830A5 JP 2008292830 A5 JP2008292830 A5 JP 2008292830A5 JP 2007139299 A JP2007139299 A JP 2007139299A JP 2007139299 A JP2007139299 A JP 2007139299A JP 2008292830 A5 JP2008292830 A5 JP 2008292830A5
- Authority
- JP
- Japan
- Prior art keywords
- resin particles
- elastic resin
- less
- mpa
- average particle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002245 particle Substances 0.000 claims 13
- 239000011347 resin Substances 0.000 claims 13
- 229920005989 resin Polymers 0.000 claims 13
Claims (1)
該導電性樹脂層が、低弾性樹脂粒子Ａ及び高弾性樹脂粒子Ｂを含有し、
該低弾性樹脂粒子Ａ及び該高弾性樹脂粒子Ｂは平均粒子径が３μｍ以上３０μｍ以下で、且つ、該高弾性樹脂粒子Ｂの平均粒子径ｂと該低弾性樹脂粒子Ａの平均粒子径ａとの差（ｂ−ａ）が５μｍ以上２７μｍ以下であり、
該低弾性樹脂粒子Ａの弾性率が０．０５ＭＰａ以上０．２ＭＰａ以下であって、該高弾性樹脂粒子Ｂの弾性率が０．３ＭＰａ以上２．０ＭＰａ以下であって、
該低弾性樹脂粒子Ａ及び該高弾性樹脂粒子Ｂが、導電性樹脂層の断面積に占める断面積が１０％以上５０％以下となるように含有されていることを特徴とする現像ローラー。 In a developing roller having a shaft core and a conductive resin layer on the surface,
The conductive resin layer contains low elastic resin particles A and high elastic resin particles B;
The low elastic resin particles A and the high elastic resin particles B have an average particle diameter of 3 μm or more and 30 μm or less, an average particle diameter b of the high elastic resin particles B, an average particle diameter a of the low elastic resin particles A, and Difference (b−a) is 5 μm or more and 27 μm or less,
The elastic modulus of the low elastic resin particles A is 0.05 MPa or more and 0.2 MPa or less, and the elastic modulus of the high elastic resin particles B is 0.3 MPa or more and 2.0 MPa or less,
A developing roller, wherein the low elastic resin particles A and the high elastic resin particles B are contained so that a cross-sectional area in a cross-sectional area of the conductive resin layer is 10% or more and 50% or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007139299A JP5196871B2 (en) | 2007-05-25 | 2007-05-25 | Developing roller, developing device using the same, electrophotographic apparatus, and process cartridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007139299A JP5196871B2 (en) | 2007-05-25 | 2007-05-25 | Developing roller, developing device using the same, electrophotographic apparatus, and process cartridge |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2008292830A JP2008292830A (en) | 2008-12-04 |
| JP2008292830A5 true JP2008292830A5 (en) | 2010-07-08 |
| JP5196871B2 JP5196871B2 (en) | 2013-05-15 |
Family
ID=40167587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2007139299A Active JP5196871B2 (en) | 2007-05-25 | 2007-05-25 | Developing roller, developing device using the same, electrophotographic apparatus, and process cartridge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5196871B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5219575B2 (en) * | 2008-03-26 | 2013-06-26 | 東海ゴム工業株式会社 | Developing roll for electrophotographic equipment |
| JP5213726B2 (en) * | 2009-01-05 | 2013-06-19 | キヤノン株式会社 | Developing roller, developing device using the same, process cartridge, and image forming apparatus for electrophotography |
| JP6067632B2 (en) | 2013-11-21 | 2017-01-25 | 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． | Charging member |
| JP7423373B2 (en) | 2019-04-01 | 2024-01-29 | キヤノン株式会社 | Developing rollers, process cartridges, and electrophotographic image forming devices |
| JP2022054903A (en) * | 2020-09-28 | 2022-04-07 | キヤノン株式会社 | Process cartridge |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4144537B2 (en) * | 2004-03-12 | 2008-09-03 | 東海ゴム工業株式会社 | Developing roll |
| JP3907632B2 (en) * | 2004-03-19 | 2007-04-18 | キヤノン株式会社 | Developing roller, process cartridge, and electrophotographic apparatus |
-
2007
- 2007-05-25 JP JP2007139299A patent/JP5196871B2/en active Active
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