Resin coated carriers for electrostatic image development and the method of preparing the same
AssigneeKonica Corporation
InventorsYoshiaki Koizumi, Kenji Tsujita, Shigenori Kouno, Ken Ohmura
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Abstract
The invention relates to a carrier and method of making a carrier in which elementary resin particles of volume average particle size not more than 0.5 m are fused on their surfaces to form secondary particles of BET surface areas of 5 to 150 m/g and volume average particle size of 1.5 to 5.0 m, which secondary particles are coated by a dry method on core particles to form carrier particles.
Claims10
A carrier for electrostatic image development comprising a resin coated carrier particle which comprises a core particle and a resin coated on the surface thereof, whose resin is coated by a dry method with secondary particles composed of elementary resin particles with a volume average particle size of not more than 0.5 .mu.m that are fused on their surface, wherein the secondary particles have
- BET specific surface areas of 5 to 150 m.sup.2 /g;
- and a
- volume average particle size of 1.5 to 5.0 .mu.m.
A method of preparation of a resin coated carrier particle comprising fusing on their surface elementary resin particles with a volume average particle size of not more than 0.5 .mu.m to form secondary particles having BET specific surface area of 5 to 150 m.sup.2 /g and a volume average particle size of 1.5 to 5.0 .mu.m coating said secondary particles on a surface of core particles by a dry method.
Dependencies are inferred from the claim text.