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Electrophotographic belt and electrophotographic image forming apparatus

An electrophotographic and image technology, which is applied to the equipment of the electric recording process applying the charge pattern, the electric recording process applying the charge pattern, the electric recording technique, etc. Effect

Active Publication Date: 2019-10-29
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result of studies, the present inventors found that even when an electrophotographic belt having grooves inclined with respect to the moving direction of the electrophotographic belt is used, as the number of printed sheets increases, adhering matter such as toner becomes Easy passage of cleaning members, which can lead to deterioration in the quality of electrophotographic images on transfer materials such as sheets

Method used

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  • Electrophotographic belt and electrophotographic image forming apparatus
  • Electrophotographic belt and electrophotographic image forming apparatus
  • Electrophotographic belt and electrophotographic image forming apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] [production of base]

[0064] First, by using a twin-screw extruder (trade name: TEX30α, manufactured by Japan Steel Works Co., Ltd.), the material for forming the base layer shown in Table 1 was replaced with polyethylene naphthalate shown in Table 1 / Polyether ester amide / carbon black=84 / 15 / 1 (mass ratio) ratio thermal melt kneading, thereby preparing a thermoplastic resin composition. The temperature of the hot melt kneading is adjusted to fall within the range of 260° C. or higher to 280° C. or lower, and the hot melt kneading time is set to about 3 minutes to 5 minutes. The obtained thermoplastic resin composition was pelletized and dried at a temperature of 140° C. for 6 hours.

[0065] Table 1

[0066]

[0067] Then, the dried granular thermoplastic resin composition was supplied to an injection molding machine (trade name: SE180D, manufactured by Sumitomo Heavy Industries Co., Ltd.). Then, with the cylinder set temperature at 295° C., the thermoplastic resin...

Embodiment 2 to Embodiment 4

[0083] Electrophotographic belts were produced in the same manner as in Example 1 except that the intervals of the convex patterns of the groove-forming cylindrical mold were set to 100 μm, 2.2 μm, and 1.8 μm, respectively, and then evaluated.

Embodiment 5

[0085] The groove-forming cylindrical die is pressed against the cylindrical belt holder half a turn. After that, the groove was formed using a cylindrical mold that was released, and then slid by 10 μm in the axial direction of the cylindrical tape holder. In addition, the cylindrical tape holder was reversely rotated by 1 mm circumferential length. In this state, the groove-forming cylindrical mold is again pressed against the cylindrical belt holder by half a turn, and then the groove-forming cylindrical mold is released. Electrophotographic belts were prepared in the same manner as in Example 1 except for the above operations, and evaluated.

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Abstract

Provided is an electrophotographic belt sustainably excellent in toner removal performance. The electrophotographic belt has an endless shape and has grooves on an outer surface thereof, each of the grooves extending in a circumferential direction and being in non-parallel with the circumferential direction, and the outer surface is composed only of a first region in which the number of the grooves in a direction orthogonal to the circumferential direction is 'n' and a second region in which the number of the grooves in the direction orthogonal to the circumferential direction is larger than the 'n', the first region and the second region being arranged alternately in the circumferential direction, and the 'n' being an integer of 1 or more.

Description

technical field [0001] The present disclosure relates to an electrophotographic belt such as a conveyance transfer belt or an intermediate transfer belt used in an electrophotographic image forming apparatus such as a copier or a printer, and also to an electrophotographic image forming apparatus including the electrophotographic belt. Background technique [0002] In an electrophotographic image forming apparatus, an electrophotographic belt is used as a conveyance transfer belt configured to convey a transfer material or as an intermediate transfer belt configured to temporarily carry a toner image for transfer. The toner not transferred to the electrophotographic belt is cleaned by using a cleaning member such as a cleaning blade formed of an elastic member such as urethane rubber. In recent years, in order to compete with other printing methods, there has been an increasing demand for higher durability of electrophotographic image forming apparatuses from the standpoint ...

Claims

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Application Information

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IPC IPC(8): G03G15/01G03G15/16G03G21/00
CPCG03G15/162G03G15/0194G03G21/0017G03G15/161
Inventor 内田光一泉馆浩次郎江川纪章豊则祐嗣齐藤秀次松尾康弘远藤隆史斋藤洸辅
Owner CANON KK