Carrier for electrophotographic developer and electrophotographic developer containing the same
AssigneePowdertech Co., Ltd.
InventorsKanao Kayamoto, Kazunori Takagi, Yuji Sato
Life of this patent
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Abstract
A carrier for an electrophotographic developer which comprises a carrier core and a resin coat having a conducting agent dispersed therein, the resin coat having an inner layer on the carrier core side and an outer layer coating the inner layer, wherein the inner layer contains 7 to 20% by weight of a conducting agent based on the resinous solid content of the inner layer, the outer layer contains 3 to 15% by weight of a conducting agent based on the resinous solid content of the outer layer, and the conducting agent content of the inner layer is greater than that of the outer layer.
Claims8
A carrier for an electrophotographic developer which comprises a carrier core and a resin coat having a conducting agent dispersed therein, the resin coat having an inner layer on the carrier core side and an outer layer coating the inner layer, wherein said inner layer contains 7 to 20% by weight of a conducting agent based on the resinous solid content of said inner layer, the outer layer contains 3 to 15% by weight of the same said conducting agent based on the resinous solid content of said outer layer, and the conducting agent content A (wt %) of said inner layer and the conducting agent content B (wt %) of said outer layer satisfies the relationship:
- B/A<1.0.
Dependencies are inferred from the claim text.