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Toner, image forming method, and image forming apparatus

一种调色剂、平均粒径的技术，应用在调色剂领域，能够解决成膜危险、凹部大小、深度、形状和排列方式不均匀、调色剂粒子带电不良等问题，达到带电均匀性优异的效果

Inactive Publication Date: 2015-03-11
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the developing roller, the toner carrying surface is sandblasted to provide fine unevenness on the surface, but the size, depth, shape, and arrangement of the recesses in the unevenness are not uniform
Therefore, for example, toner particles entering deep recesses may not be well charged due to being unable to rotate
In this way, due to the unevenness of the unevenness in the surface of the developing roller, there is a risk of poor charging of toner particles locally, or toner particles are embedded in small concave portions, and filming may occur.
In addition, when the toner particles are not well charged, the toner particles may leak from the developing device and be scattered inside or outside the image forming apparatus.

Method used

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  • Toner, image forming method, and image forming apparatus
  • Toner, image forming method, and image forming apparatus
  • Toner, image forming method, and image forming apparatus

Examples

Experimental program
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preparation example Construction

[0089] The following shows preparation examples of polyester resins, various physical properties, and preparation examples of toner mother particles. In addition, unless otherwise indicated, parts means parts by mass, and water means deionized water.

[0090] (Synthesis example of polyester resin)

[0091] Each molar combination ratio shown in Table 1 below uses terephthalic acid (TPA) and isophthalic acid (IPA) as dicarboxylic acids, and polyoxypropylene (2.4)-2,2-bis(4-hydroxybenzene) Base) propane (BPA-PO) and polyoxyethylene (2.4)-2,2-bis(4-hydroxyphenyl)propane (BPA-EO) as aromatic diols, and ethylene glycol (EG) as aliphatic Diol, trimethylolpropane (TMP) was used as aliphatic triol, and tetrabutyl titanate as a polymerization catalyst was 0.3% by mass relative to the total monomer content, and was added to a separable flask, and a thermometer was installed on the upper part of the flask , Stirring rod, condenser and nitrogen introduction tube, in an electric heating mantle...

Embodiment 1

[0201] After putting 2 kg of toner mother particles obtained by the above reverse emulsification method into a Henschel mixer (20L), the amount added per 100 g of toner mother particles (average volume particle diameter 2.9μm) is calculated (the same below ), except for the small particle size silica ("RX200" manufactured by Japan Aerosil Co., Ltd., primary particle size 12nm, HMDS (hexamethylsilazane) treated product) 2.0g, large particle size silica (made by Nippon Shokubai Co., Ltd.) "KEP10S", the primary particle size is 100nm, silicone oil treated product) 0.5g, further added θ-alumina particles "made by Damei Chemical Co., TAIMICRON TM-100, primary particle size 14nm, BET specific surface area 132m 2 / g" 1.0g, processed at a peripheral speed of 40 m / s for 2 minutes. After the treatment, coarse particles were removed with a sonic sieve using a 63 μm mesh metal mesh to obtain a toner.

Embodiment 2

[0203] In addition to replacing the θ-alumina particles in Example 1, γ-alumina particles "manufactured by Damei Chemical Co., Ltd., TM-300, primary particle size 7nm, BET specific surface area 225m" 2 A toner was prepared in the same manner as in Example 1 except for 1.0 g.

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Abstract

A toner includes toner base particles containing at least a binder resin, a coloring agent, and a release agent and having a volume-average particle size of 2 to 6 μm; a small particle size silica having an average particle size of 7 to 15 nm; a large particle size silica having an average particle size of 50 to 400 nm; and a small particle size transition alumina obtained by a dawsonite method and having an average particle size of 7 to 20 nm.

Description

Technical field [0001] The present invention relates to a toner, an image forming method, and an image forming apparatus. Background technique [0002] Conventionally, as an image forming apparatus, there have been the following methods: a photoreceptor such as a photoreceptor drum or a photoreceptor belt as a latent image carrier can be rotatably supported on the main body of the image forming apparatus. After the electrostatic latent image is formed on the layer, the latent image is visualized in a contact or non-contact manner with toner, and then the visible image is directly transferred to the transfer material using corona transfer or transfer roller Or, the visible image is temporarily transferred to an intermediate transfer medium such as a transfer drum or a transfer belt, and then transferred to the transfer material. In these image forming apparatuses, two-component toners are generally known as toners, which can develop relatively stably, but the mixing ratio of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G9/08G03G15/00
CPCG03G2215/0602G03G9/09708G03G15/0818G03G9/09725G03G15/08G03G2215/0634G03G9/0804G03G9/0827
Inventor 有贺友洋冈田英树山田阳一松本大辅
Owner SEIKO EPSON CORP
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