Magnetic carrier particles for electrophotographic developer
AssigneeFuji Xerox Co., Ltd.
InventorsTakayoshi Aoki, Masayuki Takeda, Chiaki Suzuki, Ikutaroh Nagatsuka
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Abstract
A carrier for developer is disclosed, which comprises a core having an average particle size of from 50 to 200 .mu.m and comprising fine magnetic particles dispersed in a binder resin and a polymer overcoat having a critical surface tension of from 10 to 25 dyn/cm formed on the surface of the core. The carrier has improved chargeability, high resistance to surface soiling, and high mechanical strength.
Claims19
A carrier for developer which comprises a core having an average particle diameter of from about 50 to about 200 .mu.m and comprising magnetic particles having an average particle size of from 0.05 to 5 .mu.m dispersed in a binder resin, and a polymer overcoat having a critical surface tension of from about 10 to about 25 dyn/cm and comprising a fluorinated alkylacrylate or methacrylate copolymer, formed on the surface of the core.
A carrier for developer having an average particle size of from about 50 to about 200 .mu.m which comprises magnetic particles dispersed in a binder resins that is mainly composed of a copolymer containing a fluorinated alkyl acrylate or methacrylate as a monomer component.
A developer comprising a toner composed of a pigment and a binder resin, and a carrier which comprises a core having an average particle diameter of from about 50 to about 200 .mu.m and comprising magnetic particles dispersed in a binder resin and a polymer overcoat having a critical surface tension of from about 10 to about 25 dyn/cm formed on the surface of the core.
A developer comprising a toner composed of a pigment and a binder resin, and a carrier having an average particle size of from about 50 to about 200 .mu.m which comprises magnetic particles dispersed in a binder resins that is mainly composed of a copolymer containing a fluorinated alkyl acrylate or methacrylate as a monomer component.
Dependencies are inferred from the claim text.