JP2011002686A5

JP2011002686A5 -

Info

Publication number: JP2011002686A5
Application number: JP2009146235A
Authority: JP
Filing date: 2009-06-19
Publication date: 2012-08-02
Anticipated expiration: 2029-06-19

Description

［１］機械的衝撃力により被覆処理をする手段を有する被覆処理装置を用いて、樹脂組成物粒子を磁性キャリアコア粒子の表面に被覆する被覆処理工程を有する磁性キャリアの製造方法であって、
該被覆処理装置は、少なくとも複数の攪拌部材が表面に有する回転体と、該回転体を回転駆動する駆動部と、該攪拌部材と間隙を有して設けられた本体ケーシングとを有する装置であり、
該被覆処理工程においては、該回転体を回転させ、一部の該攪拌部材により、該回転体の軸方向の一方向である該駆動部方向に、該磁性キャリアコア粒子及び該樹脂組成物粒子を送り、他の一部の該攪拌部材により、該回転体の軸方向の逆方向である反該駆動部方向に、該磁性キャリアコア粒子及び該樹脂組成物粒子を送り、該駆動部方向への送りと、該反駆動部方向への送りとを繰り返し行うことにより、該磁性キャリアコア粒子の表面に該樹脂組成物の被覆処理が行われ、
該被覆処理が、該樹脂組成物粒子を投入後第一の被覆処理を行い、更に該樹脂組成物粒子を投入して被覆処理を行うが如く、該樹脂組成物粒子を複数回に分けて投入し、複数回の被覆処理を行うことを特徴とする磁性キャリアの製造方法。 [1] Mechanical by impact using a coating apparatus having a means for the coating treatment method of the magnetic resistance carrier that have a that the coating process overturn the resin composition particles to the surface of the magnetic carrier core particles Because
The coating apparatus is that Yusuke least a rotating body in which a plurality of agitating member has a surface, a driving unit for rotationally driving the rotation body, a body casing which is provided with a the stirrer拌部material and gap device And
In the coating treatment step, the magnetic carrier core particles and the resin composition particles are rotated in the direction of the drive unit, which is one direction of the axial direction of the rotating body, by rotating the rotating body and using a part of the stirring member. The magnetic carrier core particles and the resin composition particles are fed by the other part of the stirring member in a direction opposite to the driving unit, which is the reverse direction of the axial direction of the rotating body, in the direction of the driving unit. And by repeating the feeding in the direction of the counter-drive portion, the coating treatment of the resin composition is performed on the surfaces of the magnetic carrier core particles,
As the coating treatment, the resin composition particles are added and then the first coating treatment is performed, and then the resin composition particles are further charged and the coating treatment is performed, so that the resin composition particles are charged in a plurality of times. And the manufacturing method of the magnetic carrier characterized by performing the coating process in multiple times.

Claims

Using coating processing apparatus having a means for the coating treatment by a mechanical impact force, a method for producing a magnetic resistance carrier that have a that the coating process overturn the resin composition particles to the surface of the magnetic carrier core particles ,
The coating apparatus is that Yusuke least a rotating body in which a plurality of agitating member has a surface, a driving unit for rotationally driving the rotation body, a body casing which is provided with a the stirrer拌部material and gap device And
In the coating treatment step, the magnetic carrier core particles and the resin composition particles are rotated in the direction of the drive unit, which is one direction of the axial direction of the rotating body, by rotating the rotating body and using a part of the stirring member. The magnetic carrier core particles and the resin composition particles are fed by the other part of the stirring member in a direction opposite to the driving unit, which is the reverse direction of the axial direction of the rotating body, in the direction of the driving unit. And by repeating the feeding in the direction of the counter-drive portion, the coating treatment of the resin composition is performed on the surfaces of the magnetic carrier core particles,
As the coating treatment, the resin composition particles are added and then the first coating treatment is performed, and then the resin composition particles are further charged and the coating treatment is performed, so that the resin composition particles are charged in a plurality of times. And the manufacturing method of the magnetic carrier characterized by performing the coating process in multiple times.

As the resin composition particles are added, the first coating treatment is performed, and the resin composition particles are further charged and the coating treatment is performed. When the coating treatment is performed, the amount of the resin composition particles to be charged at the first time is A part by mass, and the amount of the resin composition particles to be charged after the first time is B parts by mass, the magnetic carrier core particles are 100.0 parts by mass. On the other hand, the input amount A of the resin composition particles is 0.1 part by mass or more and 1.0 part by mass or less, and the method for producing a magnetic carrier according to claim 1.

3. The method for producing a magnetic carrier according to claim 1, wherein the relationship between the input amount A of the resin composition particles and the input amount B of the resin composition particles satisfies the following formula.
A <B

A magnetic carrier produced by coating the surface of the magnetic carrier core particle with the resin composition particle, wherein the magnetic carrier is produced by the production method according to claim 1.

The magnetic carrier is characterized in that, in the circularity distribution of circularity (a) obtained from the following formula, the number of magnetic carrier particles having a circularity (a) of 0.900 or less is 10.0% by number or less. The magnetic carrier according to claim 4.
Circularity a = L ₀ / L
[L ₀ represents the perimeter of a circle having the same projected area as the particle image, and L represents the perimeter of the particle image. ]