Resin particles and producing method thereof, toner for developing electrostatic latent image and producing method thereof, electrostatic latent image developer as well as image forming method

Abstract

A producing method of resin particles, which comprises at least an emulsification step of emulsifying a composition containing at least a polymerizable monomer and a polymerization step to form droplets of the composition, and a polymerization step of polymerizing the polymerizable monomer in the droplets to synthesize resin particles, wherein the composition is one selected from Composition A, Composition B, or Composition C: (Composition A): a composition containing a vinyl-based monomer, lactone, a vinyl-based monomer polymerization catalyst for polymerizing the vinyl-based monomer, and a lactone polymerization catalyst for polymerizing the lactone (Composition B): a composition containing a polyester resin, lactone, and a lactone catalyst for polymerizing the lact

Description

technical field [0001] The present invention relates to resin particles and a production method thereof, a toner for developing an electrostatic latent image and a production method thereof, an electrostatic latent image developer, and an image forming method. Background technique [0002] A method of making image information visible through an electrostatic charge image in a manner such as electrophotography is currently being widely used in various fields. Electrophotography consists of the following operations: forming an electrostatic charge image on a photoreceptor through a charging step and an exposure step; developing the electrostatic charge image with a developer containing toner particles, and making the developed charge image through a transfer step and a fixing step. images are visible. [0003] Incidentally, there are two types of known developers: a two-component developer comprising toner particles and carrier particles, and a one-component developer compris...

AI Technical Summary

Problems solved by technology

Also, in a one-component developer, the particle size distribution becomes broad, finely ground toner particles scatter, and along with the change in the shape of the toner, the developability decreases and the image quality deteriorates

[0006] In the case of using toner particles having an indeterminate shape, there is a problem that the fluidity is insufficient even when a fluidity aid is added

Also, due to mechanical force such as shearing force during use, fine particles of the fluidity aid move to the concave portion of the toner particle and are embedded inside thereof, while the fluidity decreases with time, and the developability, Deterioration of transferability and cleanability

[0007] In addition, when such toner is recovered from the cleaning process and returned to the developing machine for reuse, there is a problem that the image quality is easily deteriorated

As a result, among the toner particles, the uneven distribution of the composition becomes large, and there is a problem that various properties required for the toner such as fixability and chargeability cannot be sufficiently satisfied.

In this case, however, there is a problem that not only the uneven distribution of the composition among the toner particles is further promoted, but also the particle size distribution of the toner is widened, so that the uniformization of the particle diameter of the toner is changed. difficult

When an image is formed using a toner with a wide particle size distribution, due to the presence of finer toner powder in the toner particle size distribution, contamination of the developing roller, charging roller, charging blade, photoreceptor and support, and toner Scatter can become serious, and it is difficult to achieve high image quality and high reliability at the same time

[0012] There is also a problem that such a toner with a wide particle size distribution is less reliable in a system with a cleaning function or a toner circulation function

[0016] However, in this case, there is a problem that the oil transfers to the paper or film during fixing, causing stickiness on the image

In the case of using paper, there is a problem that it is difficult to write with a pen on paper on which a fixed image is formed because the surface energy of paper is lowered by the presence of oil

Furthermore, in the case of using a film, there is a problem that the transparency of the fixed image deteriorates due to oil remaining on the film

In addition, it is difficult to make the polyester resin structure exhibit a cross-linked structure

Therefore, a toner having satisfactory fixability and retention has not yet been obtained

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