JP2019028298A5 - - Google Patents
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- JP2019028298A5 JP2019028298A5 JP2017148300A JP2017148300A JP2019028298A5 JP 2019028298 A5 JP2019028298 A5 JP 2019028298A5 JP 2017148300 A JP2017148300 A JP 2017148300A JP 2017148300 A JP2017148300 A JP 2017148300A JP 2019028298 A5 JP2019028298 A5 JP 2019028298A5
- Authority
- JP
- Japan
- Prior art keywords
- straight line
- magnetic core
- resin
- line
- region
- 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.)
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- 239000011347 resin Substances 0.000 claims 8
- 229920005989 resin Polymers 0.000 claims 8
- 239000000969 carrier Substances 0.000 claims 6
- 239000011148 porous material Substances 0.000 claims 6
- 239000007771 core particle Substances 0.000 claims 5
- 239000011247 coating layer Substances 0.000 claims 1
- 238000000921 elemental analysis Methods 0.000 claims 1
Claims (1)
該樹脂充填型磁性コア粒子の表面に存在する樹脂被覆層、
を有する磁性キャリアであって、
該多孔質磁性コアの細孔径分布において、
０．１μｍ以上３．０μｍ以下の範囲における微分細孔容積が最大となるピーク細孔径が、０．４０μｍ以上１．００μｍ以下であり、
０．１μｍ以上３．０μｍ以下の範囲における微分細孔容積の積分値である細孔容積が、５８ｍｍ３／ｇ以上１００ｍｍ３／ｇ以下であり、
該磁性キャリアは、以下のように定義される領域Ｒ１及び領域Ｒ２における元素分析により求められる元素の存在比率に関し、
樹脂成分由来の組成の質量基準の割合をそれぞれＪＲ１及びＪＲ２とし、該多孔質磁性コア由来の組成の質量基準の割合をそれぞれＦＲ１及びＦＲ２とし、
さらにＪＲ１／ＦＲ１をＭＲ１、ＪＲ２／ＦＲ２をＭＲ２としたとき、
該ＭＲ１と該ＭＲ２とが、
０．２０≦ＭＲ２／ＭＲ１≦０．９０
の関係を満たすことを特徴とする磁性キャリア。
（領域Ｒ１は、該磁性キャリアの断面画像において、該樹脂充填型磁性コア粒子の最大長となる線分を引き、該線分と平行であり、該線分と２．５μｍ離れた２本の直線を直線Ａ及びＢとし、
該線分と樹脂充填型磁性コア粒子の輪郭線との交点を通り、該線分と直交する直線を直線Ｃとし、
該直線Ｃと平行であり、磁性キャリアの中心方向に向けて該直線Ｃから５．０μｍ離れた直線を直線Ｄとしたときに、
該樹脂充填型磁性コア粒子の輪郭線と、該直線Ａ、Ｂ及びＤとに囲まれ、かつ該直線Ｃに接している領域である。
領域Ｒ２は、該直線Ａ、Ｂ、Ｄと、該直線Ｄと平行であり、磁性キャリアの中心方向に向けて該直線Ｄから５．０μｍ離れた直線Ｅとに囲まれた領域である。）
Resin-filled magnetic core particles having a porous magnetic core and a filling resin existing in the pores of the porous magnetic core, and
A resin coating layer existing on the surface of the resin-filled magnetic core particles,
It is a magnetic carrier with
In the pore size distribution of the porous magnetic core,
The peak pore diameter that maximizes the differential pore volume in the range of 0.1 μm or more and 3.0 μm or less is 0.40 μm or more and 1.00 μm or less.
The pore volume, which is the integral value of the differential pore volume in the range of 0.1 μm or more and 3.0 μm or less, is 58 mm 3 / g or more and 100 mm 3 / g or less.
Magnetic carrier relates abundance ratio of elements is determined by a defined elemental analysis definitive in region R1 and region R2 are as follows:
The mass-based proportions of the composition derived from the resin component were defined as JR1 and JR2, respectively, and the mass-based proportions of the composition derived from the porous magnetic core were defined as FR1 and FR2, respectively.
Furthermore, when JR1 / FR1 is MR1 and JR2 / FR2 is MR2,
The MR1 and the MR2
0.20 ≤ MR2 / MR1 ≤ 0.90
A magnetic carrier characterized by satisfying the relationship of.
(Region R1 is a cross-sectional image of the magnetic carrier, in which a line segment having the maximum length of the resin-filled magnetic core particles is drawn, and two lines are parallel to the line segment and 2.5 μm apart from the line segment. Let the straight lines be straight lines A and B
A straight line that passes through the intersection of the line segment and the contour line of the resin-filled magnetic core particles and is orthogonal to the line segment is defined as a straight line C.
When a straight line D parallel to the straight line C and 5.0 μm away from the straight line C toward the center of the magnetic carrier is defined as a straight line D.
It is a region surrounded by the contour line of the resin-filled magnetic core particles and the straight lines A, B and D, and in contact with the straight line C.
The region R2 is a region surrounded by the straight lines A, B, and D and a straight line E parallel to the straight line D and 5.0 μm away from the straight line D toward the center of the magnetic carrier. )
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017148300A JP6914772B2 (en) | 2017-07-31 | 2017-07-31 | Magnetic carrier, two-component developer, replenisher developer, and image forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017148300A JP6914772B2 (en) | 2017-07-31 | 2017-07-31 | Magnetic carrier, two-component developer, replenisher developer, and image forming method |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2019028298A JP2019028298A (en) | 2019-02-21 |
| JP2019028298A5 true JP2019028298A5 (en) | 2020-09-03 |
| JP6914772B2 JP6914772B2 (en) | 2021-08-04 |
Family
ID=65476239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2017148300A Active JP6914772B2 (en) | 2017-07-31 | 2017-07-31 | Magnetic carrier, two-component developer, replenisher developer, and image forming method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6914772B2 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100028796A1 (en) * | 2008-08-04 | 2010-02-04 | Canon Kabushiki Kaisha | Magnetic carrier and two-component developer |
| KR101826390B1 (en) * | 2011-06-29 | 2018-02-06 | 캐논 가부시끼가이샤 | Magnetic carrier and two-component developer |
| US8974994B2 (en) * | 2012-01-31 | 2015-03-10 | Canon Kabushiki Kaisha | Magnetic carrier, two-component developer, and developer for replenishment |
| JP6320147B2 (en) * | 2013-05-30 | 2018-05-09 | キヤノン株式会社 | Magnetic carrier, two-component developer, replenishment developer, and image forming method |
| JP6632249B2 (en) * | 2014-08-26 | 2020-01-22 | キヤノン株式会社 | Magnetic carrier and two-component developer |
-
2017
- 2017-07-31 JP JP2017148300A patent/JP6914772B2/en active Active
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