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Member for electrophotography, process cartridge and image forming apparatus

A technology for electrophotography and charging member, which is applied to the equipment of the electric recording process applying the charge pattern, the electric recording process applying the electric charge pattern, the electrical components and other directions, and can solve the problems of reducing the effect of reducing the adhesion of dirt and the like.

Active Publication Date: 2018-04-20
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in some cases where the number of output images increases, the effect of suppressing dirt adhesion is reduced

Method used

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  • Member for electrophotography, process cartridge and image forming apparatus
  • Member for electrophotography, process cartridge and image forming apparatus
  • Member for electrophotography, process cartridge and image forming apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107]

[0108] The kinds and amounts of each material shown in Table 1 were mixed using a pressure kneader to obtain a kneaded rubber composition A. Further, 183.0 parts by mass of the kneaded rubber composition A was mixed with the kinds and amounts of each material shown in Table 2 below using an open mill to obtain an unvulcanized rubber composition.

[0109] Table 1

[0110]

[0111] Table 2

[0112]

[0113]

[0114] A cylindrical steel substrate (having a nickel-plated surface) with a diameter of 6 mm and a length of 252.5 mm was coated with a thermosetting adhesive (Metalock N-33, manufactured by ToyoKagaku Kenkyusho Co., Ltd.). The resultant was dried at 80° C. for 30 minutes, and then further dried at 120° C. for 1 hour.

[0115] Next, the unvulcanized rubber composition was coaxially extruded on the substrate into a cylindrical shape with an outer diameter of 8.75 to 8.90 mm using a crosshead extruder to obtain an unvulcanized rubber member. Subsequentl...

Embodiment 2 to 37

[0186]

[0187] Coating liquids 2 to 33 were prepared in the same manner as in coating liquid 1 except that the composition was changed as shown in Tables 3-1 to 3-4. The kinds of the following components (A) to (E) described in Tables 3-1 to 3-4 are shown in Table 4.

[0188] (A) polyol (hydroxyl-terminated prepolymer),

[0189] (B) Isocyanate (isocyanate-terminated prepolymer),

[0190] (C) second particles,

[0191] (D) silicone additives, and

[0192] (E) First particle

[0193] Prepared in the same manner as in Example 1 by adjusting the isocyanate group content to 4.3% by mass by means of a preliminary reaction between polyol and polymerized MDI (trade name: Millionate MR 200, manufactured by Tosoh Corporation) Using isocyanate group-terminated prepolymerization some parts of things.

[0194]

[0195] Members 2 to 37 for electrophotography were produced and evaluated in the same manner as in Example 1 except that the coating liquid used in the surface layer form...

Embodiment 38

[0208] Members for electrophotography were produced and evaluated in the same manner as in Example 1, except that the materials described in Table 5 were used instead of Epichlomer CG-102 (also referred to as CG 102) in the preparation of the kneaded rubber composition A 38. The evaluation results are shown in Table 9-6.

[0209] table 5

[0210]

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PUM

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Abstract

The present invention relates to a member for electrophotography, a process cartridge and an image forming apparatus. It is desired to provide a member for electrophotography that can suppress the adhesion of dirt to the outer surface. The member for electrophotography has a base, an elastic layer on the base, and a surface layer on the elastic layer. The surface layer comprises a binder resin and first particles, the surface of the surface layer has first protrusions originating from the first particles, the first particles generating the first protrusions have an average particle surface distance of 50 nm or less, the first particles It has a number average particle diameter of 200 nm or more and 1000 nm or less, and the surface of the surface layer has a universal hardness of 1.0 N / mm2 or more and 7.0 N / mm2 or less.

Description

technical field [0001] The present invention relates to a member for electrophotography, a process cartridge and an image forming apparatus. Background technique [0002] In an image forming apparatus based on the electrophotography method, members for electrophotography are used for various purposes, for example, a charging member, a developing member, and a transferring member. In the case of applying the member for electrophotography to these uses for a long period of time, powder such as external additives or toner remaining on the image bearing member adheres to the surface of the member for electrophotography as dirt. For example, with regard to the charging member, when such dirt adheres to the surface of the charging member, the area where the dirt adheres partially becomes high in resistance, resulting in poor charging. As a result, image density unevenness may be caused due to dirt. [0003] In recent years, image forming apparatuses have been required to have hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/02G03G21/18
CPCG03G15/0233G03G21/1814B32B1/00B32B15/06B32B15/082B32B15/18B32B15/20B32B27/302B32B2255/10B32B2255/26B32B2264/0207B32B2264/0292B32B2264/10B32B2274/00B32B2307/202B32B2307/51B32B2307/536B32B2307/546B32B2559/00G03G8/00B32B1/08B32B25/14B32B2255/06B32B2255/205B32B2307/20B32B2307/538G11B7/00
Inventor 益启贵山内一浩西冈悟山内健一铃村典子
Owner CANON KK
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