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Toner and image forming process

A technology of toner and colorant, applied in the field of toner, which can solve problems that have not yet been successful

Active Publication Date: 2009-05-13
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such inventions have not been successful in achieving any adequate performance

Method used

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  • Toner and image forming process
  • Toner and image forming process
  • Toner and image forming process

Examples

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Embodiment Construction

[0046] In the present invention, a fatty acid metal salt composition containing a nonionic surfactant is added to the toner mother particles as an external additive. This can improve the releasability of the toner and can prevent the toner from melting-adhering (toner filming) to the toner carrying member. Furthermore, due to its excellent releasability, it is possible to prevent fine powder having a relatively small particle diameter from remaining on the surface of the toner carrying member, and this makes it possible to maintain a stable particle size distribution throughout the operation.

[0047] In addition, as long as a fatty acid metal salt composition containing a nonionic surfactant is added as an external additive to toner base particles, the charging stability of the toner is improved, and the charge amount can be maintained at a suitable level throughout operation. within range. Therefore, this can well prevent any occurrence of halftone image unevenness and imag...

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Abstract

A toner which has i) toner base particles containing at least a binder resin and a colorant and ii) a fatty acid metal salt composition as an external additive. The fatty acid metal salt composition contains a nonionic surface-active agent and a fatty acid metal salt. This toner and an image forming process making use of the toner can keep the toner from adhering to a toner carrying member throughout running, promise a stable chargeability of the toner and can keep any deterioration of halftone image quality from being caused by excess charging of the toner and any image fog from being caused by insufficient charging of the toner.

Description

technical field [0001] The present invention relates to a toner used in an image forming method using electrophotography or electrostatic recording. More specifically, it relates to an image forming method using a toner having i) a toner base particle containing a binder resin, a colorant, and a release agent, and ii) an external additive powder. Background technique [0002] A developing method for electrophotographic apparatuses and the like is a method in which a toner image is formed by adhering toner to an electrostatic latent image formed on an electrostatic latent image bearing member to visualize the electrostatic latent image, and then the toner is The agent image is transferred to a recording medium, and then passed through a fixing step to obtain a fixed image. [0003] As developers for electrophotography, they are classified into one-component developers and two-component developers. Regarding toners, they are also classified into magnetic and non-magnetic. ...

Claims

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Application Information

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IPC IPC(8): G03G9/087G03G9/08G03G13/00
Inventor 半田智史矶野直也野中克之阿部浩次桥本康弘杉山享照井雄平
Owner CANON KK
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