Toner

Abstract

A toner includes toner particles containing a binder resin, a colorant, and inorganic fine particles, in which in a depth profile of an element distribution in a depth region from the outermost surface of a particle to a depth of 500 nm the depth profile being obtained by an element analysis performed by X-ray photoelectron spectroscopy using the toner as a sample, two or more minimum points of a concentration of a carbon element in the depth region exist, a concentration of an inorganic element becomes a maximum value at a depth position corresponding to each of the minimum points, and the inorganic element is an element derived from the inorganic fine particle.

Description

BACKGROUND OF THE INVENTIONField of the Invention[0001]The present invention relates to a toner for developing an electrostatic image used in an electrophotographic method, an electrostatic recording method, or the like.Description of the Related Art[0002]In order to cope with recent high image quality, energy saving, and high-speed printing, it is required to use a toner having a small particle size, low-temperature fixability, and sharp meltability. For example, for energy saving, power consumption in a fixing process is suppressed using a binder resin having a low glass transition point or softening point for the toner. Furthermore, in order to cope with high-speed printing, the toner is quickly melted using a binder resin having sharp meltability for the toner. In addition, in order to cope with high image quality, the toner has a small particle size to suppress a noise on an image and improve micro-image quality.[0003]However, when such a technique is used, toner particles may ...

AI Technical Summary

Benefits of technology

The present invention aims to provide a toner that can prevent the deterioration of transferability and the occurrence of ghost over a long period of use. The toner includes toner particles containing a binder resin, a colorant, and inorganic fine particles. By using this toner, it is possible to improve the image quality and durability of the toner.

Problems solved by technology

However, in the method of Japanese Patent Application Laid-Open No. 2001-147547, although the adhesion of the external additive to the surface of the toner particle can be improved as compared with the case of adding the external additive having a single particle size, in a case where a larger amount of the external additive is required to enhance the transferability of the toner such as using toner particles having a small particle size, the transfer of the external additive to the carrier or the drum may not be sufficiently suppressed.

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