Production method of magnetic carrier and magnetic carrier produced therewith
First Claim
1. A method for producing a magnetic carrier, comprising coating a surface of magnetic carrier core particles with resin composition particles by a mechanical impact force to produce a magnetic carrier coated with a resin composition, whereinthe coating is conducted by the use of a coating apparatus comprising a rotor having at least a plurality of stirring members on a surface thereof, a driver for driving the rotor by rotation, and a body casing disposed with a gap from the stirring members;
- the resin composition particles has a 50% particle diameter (D50) based on volume of from 0.2 μ
m or more to 6.0 μ
m or less and the proportion of particles of 10.0 μ
m or more is 2.0% by volume or less; and
the magnetic carrier core particles and the resin composition particles input in the coating apparatus are, by rotating the rotor, transported by a part of the stirring members in a direction of the driver which is one direction of an axial direction of the rotor and transported by another other part of the stirring members in an anti-driver direction which is a direction reverse to the axial direction of the rotor, followed by, while repeatedly conducting the transportation in the driver direction and the transportation in the anti-driver direction, coating the surface of the magnetic carrier core particles with the resin composition particles.
1 Assignment
0 Petitions
Accused Products
Abstract
When a surface of magnetic carrier core particles is coated with coating resin composition particles, the coating is conducted so that a surface of the magnetic carrier is free from cracks and chips and has fewer residual resin composition particles and a coating is uniform. In the method, a rotor having a plurality of stirring members on a surface thereof is rotated to coat the surface of magnetic carrier core particles with the resin composition particles. When the coating is conducted, while repeatedly conducting transportation in a direction of a driver and transportation in an anti-driver direction, the surface of the magnetic carrier core particles is coated with the resin composition. The resin composition particles has a 50% particle diameter (D50) based on volume of 0.2 μm or more to 6.0 μm or less and the proportion of particles of 10.0 μm or more is 2.0% by volume or less.
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Citations
3 Claims
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1. A method for producing a magnetic carrier, comprising coating a surface of magnetic carrier core particles with resin composition particles by a mechanical impact force to produce a magnetic carrier coated with a resin composition, wherein
the coating is conducted by the use of a coating apparatus comprising a rotor having at least a plurality of stirring members on a surface thereof, a driver for driving the rotor by rotation, and a body casing disposed with a gap from the stirring members; -
the resin composition particles has a 50% particle diameter (D50) based on volume of from 0.2 μ
m or more to 6.0 μ
m or less and the proportion of particles of 10.0 μ
m or more is 2.0% by volume or less; andthe magnetic carrier core particles and the resin composition particles input in the coating apparatus are, by rotating the rotor, transported by a part of the stirring members in a direction of the driver which is one direction of an axial direction of the rotor and transported by another other part of the stirring members in an anti-driver direction which is a direction reverse to the axial direction of the rotor, followed by, while repeatedly conducting the transportation in the driver direction and the transportation in the anti-driver direction, coating the surface of the magnetic carrier core particles with the resin composition particles. - View Dependent Claims (2, 3)
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Specification