Toner and process cartridge

Abstract

A toner including a fluorine-containing compound partially comprising a quaternary ammonium group at the surface thereof, which is prepared by a method, including dispersing or emulsifying an oil phase including toner constituents including a pigment, and at least one member selected from the group consisting of modified layered inorganic minerals partially including a quaternary alkylammonium group and toner constituent precursors in an aqueous medium, wherein the toner constituents includes the modified layered inorganic mineral in an amount of from 0.05 to 2% by weight and the toner includes a fluorine atom in an amount of from 0.02 to 0.075 K cps when measured with a fluorescent X-ray.

Description

field of invention The present invention relates to a toner and a process cartridge for an electrophotographic image forming apparatus. Background technique Recently, as the printers have high performance, especially full-color printers have high speed, longer life, and high-quality images, the performance requirements for toners are also increasing. Especially in the case of a high-speed printer, the charging speed and stability of the toner become important. In this field, there are many studies. WO01 / 040878, WO2004 / 019137, WO2004 / 019138 and Japanese Patent Laid-Open No. 2003-202708 disclose the use of a layered compound for charge control. However, all of them have insufficient charging speeds when used as a one-component developer. If the modified compound is used in a sufficient amount to impart a sufficient charging speed to the toner, it will have an adverse effect on the environmental stability of the toner due to the fact that the lamellar compound has a hydroph...

AI Technical Summary

Problems solved by technology

Not only does this increase the cost, but the fluorine-containing resin soluble in a solvent such as ethanol cannot completely control the chargeability of the toner

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