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Conductive roller

A technology of conductive rollers and parts by mass is applied in the field of conductive rollers with a toner conveying part, which can solve the problems of poor image, poor toner, and reduced developing efficiency, and achieves maintaining printing density and excellent printing performance. , The effect of simple process management

Inactive Publication Date: 2010-06-23
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0026] However, in this method, there is a case where electrostatic toner adhesion is too strong, which leads to a decrease in development efficiency, which in turn accelerates the deterioration of the toner, and there is a possibility that image defects may occur in the latter half of durable use. problem, there is room for improvement on this

Method used

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Examples

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Embodiment 1～12、 comparative example 1～3

[0171] "Examples 1-12, Comparative Examples 1-3"

[0172] The compounding materials described in Table 1 (the numerical values ​​in the table represent parts by mass.), 0.75 parts by mass of powdered sulfur as a vulcanizing agent, and 0.75 parts by mass of ethylene thiourea ("ACCEL 22-S" manufactured by Kawaguchi Chemical Industry Co., Ltd.) Parts by mass, after 6 parts by mass of hydrotalcite ("DHT-4A-2" manufactured by Kyowa Chemical Industry Co., Ltd.) as an acid receiving agent, kneaded with a Banbury mixer, extruded with a rubber extruder into an outer diameter of φ22mm, Processing is performed for tubular shapes with an inner diameter of φ9 to 9.5 mm. The pipe was mounted on a φ8 mm shaft for vulcanization, vulcanized at 160° C. for 1 hour in a vulcanization autoclave, mounted on a φ10 mm shaft coated with a conductive adhesive, and glued in an oven at 160° C. Then, the end portion was cut into shape, traversed by a cylinder grinder, and then mirror-polished as finish g...

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Abstract

It is an object of the present invention to provide a conductive roller which restrains the transport of excessive toner, allows a preferable toner separation to be accomplished, allows a proper print density to be kept, and provides an excellent printing performance for a long time from an initial stage of use. A conductive roller has a toner transport part (1) composed of a vulcanized rubber composition on its outermost layer. The vulcanized rubber composition contains rubber component (A); highly conductive carbon black (B) having a particle diameter of not less than 18 nm and less than 80 nm; and an inorganic filler (C) consisting of not less than one kind of metal oxide selected from titanium oxide, alumina, or silica. A total content of components (B) and (C) for 100 pts.mass of component (A) is 10-60 pts.mass.

Description

technical field [0001] The present invention relates to a conductive roller, and more specifically, to a conductive roller having a toner conveying portion and used as a developing roller, cleaning roller, charging roller, transfer roller, or the like mounted in an electrophotographic device. Background technique [0002] In the printing technology using electrophotography, in order to meet the requirements of high speed, high image quality, colorization, and miniaturization, repeated improvements have been made. In particular, the key toner has achieved miniaturization and particle size adjustment. Homogenization and spherification. [0003] With regard to the miniaturization of toners, toners having a particle diameter of 10 μm or less, and furthermore, 5 μm or less have appeared. Regarding the spherification of the toner, toners having a sphericity of more than 99% are present. Furthermore, in order to achieve high image quality, aggregated toners are becoming mainstrea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08
CPCG03G15/0812G03G15/0233G03G2215/0861G03G2215/1614
Inventor 水本善久
Owner SUMITOMO RUBBER IND LTD