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Toner and method of manufacturing toner

A kind of toner, organic technology, applied in the field of toner, can solve the problems of insufficient durability of toner, weakened wax bleed effect, and decreased offset resistance, so as to improve storage stability and prevent bleed effect from weakening , Improving the effect of offset printing resistance

Inactive Publication Date: 2005-02-02
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the toners produced by the methods disclosed in Patent Document 1 and Patent Document 2 have a problem of insufficient durability, and when the amount of fine particles added is increased to solve the problem related to durability, wax bleeding during oil-free fixation The effect is weakened, and the resistance to offset printing (offset resistance) is reduced
[0007] In addition, in the methods shown in Patent Document 3 and Patent Document 4, there is a problem that the chargeability is deteriorated due to the presence of a functional group charged oppositely to the parent particle.

Method used

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  • Toner and method of manufacturing toner
  • Toner and method of manufacturing toner
  • Toner and method of manufacturing toner

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Embodiment

[0072] Next, the production conditions and evaluation of the toner of the present invention and the toner of the comparative sample produced under various conditions will be described as examples. First, a method for producing organic fine particles required for toner will be described. In addition, the expansion ratio was calculated for the produced organic fine particles. Using DLS-700 (manufactured by Otsuka Electronics Co., Ltd.), the volume average particle diameter La at the stage before the formation of the shell and the volume average particle diameter Lb at the stage of mixing a neutralizing agent to expand it after the formation of the shell were measured, and the expansion was calculated using the following formula 1 Rate.

[0073] Expansion rate = Lb / La...Formula 1

[0074] In the formula, La: volume average particle size before shell formation

[0075] Lb: Volume average particle size after neutralization

[0076] (Organic Microparticles MG-1)

[0077] In the...

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Abstract

A toner includes cross-linked type organic fine particles having a core-shell structure to be attached to a base particle, and the cross-linking degree of the core part is made higher than that of the shell part. A toner is manufactured by mixing cross-linked type organic fine particles having a core-shell structure with a solution containing a neutralizer, dispersing a composition for forming a base particle, which contains a releasing agent and a colorant, into the solution in which the organic fine particles are mixed, and separating the composition from the solution.

Description

technical field [0001] The present invention relates to a toner produced by attaching microparticles to mother particles and a method for producing the toner, and in particular to an electrophotographic technology used in image forming devices such as copying devices and printing devices. A toner and a method for producing the toner. Background technique [0002] In image forming devices such as copying devices and printing devices, electrophotographic technology is used, that is, the photoreceptor drum is uniformly charged, and the optical image based on the image to be formed is scanned to form on the charged photoreceptor drum. The electrostatic latent image is formed by attaching a powder toner containing a colorant to the electrostatic latent image to form a visible image, develop the image, and transfer the obtained visible image to a sheet such as copy paper, An image is formed by fixing the transferred toner on the sheet. [0003] Typical methods for fixing the ton...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/08G03G9/087G03G9/097
CPCG03G9/0804G03G9/09733
Inventor 芝井康博有好智
Owner SHARP KK
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