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Toner, method of preparing the toner, and developer, image forming method, image forming apparatus, and process cartridge

一种调色剂图像、调色剂的技术，应用在显影剂、应用电荷图形的电记录工艺的设备、电记录术等方向，能够解决影响调色剂性能、未提及等问题

Inactive Publication Date: 2007-08-15
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, there is no mention of how the size of the protrusions (ie, the degree of exposure of the parent particles) affects the performance of the toner

Method used

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  • Toner, method of preparing the toner, and developer, image forming method, image forming apparatus, and process cartridge
  • Toner, method of preparing the toner, and developer, image forming method, image forming apparatus, and process cartridge
  • Toner, method of preparing the toner, and developer, image forming method, image forming apparatus, and process cartridge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0421] Preparation of Unmodified Polyester (Low Molecular Weight Polyester)

[0422] Charge the following components into a reaction vessel equipped with a condenser, stirrer and nitrogen inlet tube.

[0423] 67 parts of the adduct of ethylene oxide (2mol) of bisphenol A

[0424] Adduct of propylene oxide (3mol) of bisphenol A 84 parts

[0425] 274 parts of terephthalic acid

[0426] Dibutyltin oxide 2 parts

[0427] The mixture was reacted at 230° C. under normal pressure for 8 hours. The reaction was then continued for 5 hours under a reduced pressure of 10 to 15 mmHg. Thus, an unmodified polyester was prepared.

[0428] The number average molecular weight (Mn) of the unmodified polyester was 2100, the weight average molecular weight (Mw) was 5600, and the glass transition temperature (Tg) was 55°C.

[0429] Preparation of masterbatch

[0430] The following components were mixed using a Henschel mixer (manufactured by Mitsui Mining Co., Ltd.).

[0431] 1000 parts...

Embodiment 2

[0474] The preparation procedure of the mother toner (1) in Example 1 was repeated except that the amount of the added silicone resin (1) was changed from 30 parts to 15 parts. Thus, mother toner (2) was prepared.

Embodiment 3

[0476] The mother toner (1 ) preparation process. Thus, mother toner (3) was prepared.

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Abstract

A toner is provided including a colorant; a first binder resin; and a second binder resin, wherein an amount of the first binder resin and an amount of the second binder resin are phase separated from each other in the toner, and wherein a phase of the first binder resin is partially or completely covered with a phase of the second binder resin; and a method of preparing the toner, and a developer, an image forming method, an image forming apparatus, and a process cartridge using the toner.

Description

technical field [0001] The present invention relates to a toner for electrophotography and a method for preparing the same. In addition, the present invention also relates to a developer using the toner, an image forming method, an image forming apparatus, and a process cartridge. Background technique [0002] In electrophotography, images are usually formed as follows: [0003] (1) Charging the surface of the photoreceptor serving as an image bearing member by discharging (ie, charging step); [0004] (2) irradiating the charged surface of the photoreceptor to form an electrostatic latent image thereon (ie, the irradiating step); [0005] (3) developing the electrostatic latent image formed on the photoreceptor by supplying toner to the photoreceptor to form a toner image thereon (ie, a developing step); [0006] (4) transferring the toner image formed on the photoreceptor to the surface of the transfer medium (ie, the transfer step); [0007] (5) fixing the toner image...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/08G03G9/09G03G9/087G03G9/10G03G13/00G03G15/00G03G21/18
CPCG03G9/09392G03G9/0804G03G9/09371G03G9/09378G03G9/09328G03G9/081G03G9/09357
Inventor 杉本强山下裕士井上竜太森屋芳洋若松慎一小番昭宏
Owner RICOH KK
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