Toner, method of manufacturing the same, image forming apparatus and image forming method

A manufacturing method and technology of toner, applied in the field of toner, can solve the problems of increasing charging uniformity, insufficient smoothness of toner surface, poor environmental stability, etc., and achieve good charging uniformity and good environmental stability Effect

Inactive Publication Date: 2010-09-22
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the above-mentioned toners produced using condensed salts or electrolytes are generally poor in environmental stability, or when the condensed particles form a shell, the shell layer is unevenly covered or the fusion between particles is insufficient, so that occurrences such as bleeding of the release material out of question
Also, in many cases, the smoothness of the toner surface is insufficient, increasing the possibility of occurrence of charging uniformity problems
When heating and fusion are promoted, redistribution of constituent materials is likely to occur, and as a result, there is still the possibility of uneven coating of the shell

Method used

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  • Toner, method of manufacturing the same, image forming apparatus and image forming method
  • Toner, method of manufacturing the same, image forming apparatus and image forming method
  • Toner, method of manufacturing the same, image forming apparatus and image forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0323]

[0324] Put 24 parts of [polyester resin 1], 8 parts of paraffin (melting point: 72°C), and 96 parts of ethyl acetate in a container with a stirring rod and a thermometer, raise the temperature to 80°C under stirring, and keep it at 80°C After 5 hours, cool to 30° C. within 1 hour. Next, add 35 parts of [Master Batch 1], mix for 1 hour, replace the container, and use a bead mill (Ultrabeadmill, manufactured by IMEX Co. Ltd.) to disperse under the following conditions, that is, the infusion rate is 1kg / hr, Speed ​​6m / sec, filling 0.5mm zirconia grinding beads 80% by volume, and 3 channels to obtain [raw material solution 1]. Next, 76.5 parts of a 70% ethyl acetate solution of [polyester 1] was added to 81.5 parts of [raw material solution 1], and stirred for 2 hours with a Sany motor to obtain [oil phase 1]. Ethyl acetate was added to [Oil Phase 1], and the solid content concentration therein (measured at 130° C., 30 min) was adjusted to 50%.

[0325]

[0326] 202...

Embodiment 2

[0341]

[0342] Add 61.0 parts of [polyester 1] 70% ethyl acetate solution to 81.5 parts of [raw material solution 1], and stir for 2 hours with a Sany motor to obtain [oil phase 2]. Ethyl acetate was added to [oil phase 2], and the solid content concentration therein (measured at 130° C., 30 min) was adjusted to 50%.

[0343]

[0344] Add 0.4 parts of isophorone diamine and 23.2 parts of [prepolymer] to the entire amount of the above [oil phase 2], mix at 5000 rpm for 1 minute with a TK emulsifying homogenizer (manufactured by special mechanism), and then add [water phase 1] The whole amount was mixed with a TK emulsifying homogenizer in the range of 8000-13000rpm while adjusting for 20 minutes to obtain [nuclear particle paste 2].

[0345]

[0346] While stirring the above-mentioned [nuclear particle paste 2] at 200 rpm with a Sany motor, 60 parts of [polyester microparticle dispersion liquid 1] was added dropwise over 5 minutes, and the stirring was continued for 30 m...

Embodiment 3

[0348]

[0349] Add 53.2 parts of [polyester 1] 70% ethyl acetate solution to 81.5 parts of [raw material solution 1], and stir for 2 hours with a Sany motor to obtain [oil phase 3]. Ethyl acetate was added to [oil phase 3], and the solid content concentration therein (measured at 130° C., 30 min) was adjusted to 50%.

[0350]

[0351] Add 0.4 parts of isophorone diamine and 21.3 parts of [prepolymer] to the entire amount of the above [oil phase 3], mix at 5000 rpm for 1 minute with a TK emulsifying homogenizer (manufactured by special mechanism), and then add [water phase 1] The whole amount was mixed with a TK emulsifying homogenizer in the range of 8000-13000 rpm for 20 minutes while adjusting to obtain [nuclear particle paste 3].

[0352]

[0353] While stirring the above-mentioned [nuclear particle paste 3] at 200 rpm with a Sany motor, add 80 parts of [polyester microparticle dispersion 1] dropwise over 5 minutes, and continue stirring in this state for 30 minutes....

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PUM

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Abstract

The present invention relates to a toner, a method of manufacturing the same, an image forming apparatus and an image forming method. The aim of the invention is to provide the toner with the advantages of good environment stability, good uniformity on chargeability, and a good balance between the fixing property and the heat resistance. The toner of the invention has a structure of core and contains at least two kinds of resins having a polyester skeleton and a releasing agent. The invention is characterized in that no peak that derives from magnesium, calcium, or aluminum in the mother toner particle is observed in a qualitative analysis using an X-ray fluorescence measuring instrument. Preferably the core particle which forms the structure of core comprises a first resin having a first polyester skeleton, and the core material which covers the core particle contains a second resin that is different from the first resin and has a second polyester skeleton.

Description

technical field [0001] The present invention relates to a toner used in an electrophotographic method, and further relates to a toner container using the toner, a developer, a developing device, a process cartridge, an image forming apparatus, an image forming method, and production of the toner method. Background technique [0002] So far, various creative improvements and technical attempts have been made in the research and development of electrophotography. In the electrophotographic method, after the latent image carrier (hereinafter also referred to as photoreceptor) is charged to charge its surface, the electrostatic latent image formed by exposure is developed with colored toner to form a toner image, and then The toner image is transferred to a transfer target such as transfer paper, and fixed by a heating roller or the like to form an image. [0003] For toner fixing, a contact heating fixing method such as a heating roller fixing method is widely used. The fixi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/08G03G15/08G03G21/18G03G15/00
CPCG03G9/093G03G9/09392G03G9/09371G03G9/09328
Inventor 野崎刚门田拓也深尾朋宽三木智晴御厨义博山本淳史石川义道
Owner RICOH KK
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