DEVELOPER OF ELECTROSTATIC CHARGE IMAGE

PURPOSE:To enhance image density by using a developer composed of a toner using a binder of a polyester resin contg. a fine silica powder and a fatty acid metal salt, and a carrier having a coating layer made of a polymer blend of specified 2 kinds of polymers. CONSTITUTION:A toner is obtained by in...

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Bibliographic Details
Main Authors SHIGETA KUNIO, TSUJITA KENJI
Format Patent
LanguageEnglish
Published 10.09.1985
Edition4
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:PURPOSE:To enhance image density by using a developer composed of a toner using a binder of a polyester resin contg. a fine silica powder and a fatty acid metal salt, and a carrier having a coating layer made of a polymer blend of specified 2 kinds of polymers. CONSTITUTION:A toner is obtained by incorporating a colorant in a binder of a polyester resin contg., mixing them in a ball mill or the like, executing each step of kneading, pulverizing, and classifying to form toner particles, and adding a fine hydrophobic silica powder and a fatty acid metal salt to them. A carrier is obtained by forming on the surface of a core material a coating layer made of a polymer blend of a vinylidenefluoride/tetrafluoroethylene copolymer in a molar ratio of 75:25-95:5 and a polymer compatible with said copolymer, and said toner is mixed with this carrier to obtain the developer of an electrostatic charge image.
Bibliography:Application Number: JP19840030343