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Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus

A technology of electrophotography and photosensitive components, which is applied to the equipment of the electric recording process using the charge pattern, the electric recording process using the charge pattern, optics, etc., and can solve the problem of the reduction of sensitivity, the change of the potential of the bright area, and the white turbidity of the surface layer. and other problems, to achieve the effect of reducing the initial friction coefficient and suppressing the change of bright area potential

Active Publication Date: 2014-04-09
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, if silicone oil is contained in the surface layer of the electrophotographic photosensitive member as in Japanese Patent Application Laid-Open H07-13368, there is a tendency for the surface layer to become cloudy resulting in a decrease in sensitivity to decrease image density
[0005] In addition, if polycarbonate resin and polyester resin each having a siloxane structure at the terminal are used as in Japanese Patent No. 3278016 and Japanese Patent No. 3781268, compared with the case of using a resin not having a siloxane structure, due to electrophotographic photosensitive Larger changes in bright area potential due to repeated use of components

Method used

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  • Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
  • Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
  • Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus

Examples

Experimental program
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Effect test

Embodiment 1

[0157] An aluminum cylinder having a diameter of 24 mm and a length of 261.6 mm was used as a support (conductive support).

[0158] Then, using 10 parts of SnO 2 Coated barium sulfate (conductive particles), 2 parts of titanium oxide (pigment for resistance adjustment), 6 parts of phenolic resin (binder resin), 0.001 part of silicone oil (leveling agent), and 4 parts of methanol and 16 parts of methoxy A mixed solvent of propanol was used to prepare a coating solution for a conductive layer.

[0159] The coating liquid for a conductive layer was applied on the support by dip coating, and solidified (thermally cured) at 140° C. for 30 minutes, thereby forming a conductive layer having a film thickness of 15 μm.

[0160] Then, 3 parts of N-methoxymethylated nylon and 3 parts of copolymerized nylon were dissolved in a mixed solvent of 65 parts of methanol and 30 parts of n-butanol, thereby preparing a coating liquid for an intermediate layer.

[0161] The coating liquid for an...

Embodiment 2-6

[0175] Each electrophotographic photosensitive member was manufactured and evaluated in the same manner as in Example 1 except that the type and content of Compound γ in Example 1 were changed to those shown in Table 4. The results are shown in Table 13. As in Example 1, the electrophotographic photosensitive member in Comparative Example 1 was used as an electrophotographic photosensitive member for comparison.

Embodiment 7

[0177] An electrophotographic photosensitive member was produced and evaluated in the same manner as in Example 1 except that the drying temperature and time during the formation of the charge transport layer in Example 1 were changed to 145° C. and 60 minutes. The results are shown in Table 13. As in Example 1, the electrophotographic photosensitive member in Comparative Example 1 was used as an electrophotographic photosensitive member for comparison.

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Abstract

The electrophotographic photosensitive member includes a surface layer containing (alpha) a polycarbonate or polyester resin not having a siloxane structure at the end, (beta) a polycarbonate or polyester or acrylic resin having a siloxane structure at the end, and (gamma) a methyl benzoate, an ethyl benzoate, a benzyl acetate, ethyl 3-ethoxypropionate or a diethylene glycol ethyl methyl ether.

Description

technical field [0001] The present invention relates to an electrophotographic photosensitive member, a process cartridge, and an electrophotographic apparatus. Background technique [0002] As an electrophotographic photosensitive member to be mounted on an electrophotographic apparatus, an electrophotographic photosensitive member containing an organic photoconductive substance (charge generating substance) is generally used. As an electrophotographic apparatus repeatedly forms images, electrical and mechanical external forces such as charging, exposing, developing, transferring, and cleaning external forces are directly applied to the surface of an electrophotographic photosensitive member, and thus there is a demand for durability of such external forces. In addition, there is also a demand for reducing the frictional force (lubricity and slidability) of a contact member (cleaning blade, etc.) on the surface of an electrophotographic photosensitive member. [0003] To s...

Claims

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Application Information

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IPC IPC(8): G03G5/05G03G5/047G03G5/147
CPCG03G5/14791G03G5/14786G03G15/751G03G2215/00957G03G5/14756G03G5/14752G03G5/051G03G5/0514G03G5/0517G03G5/056G03G5/0564G03G5/0578
Inventor 田中大介杉山和道西田孟
Owner CANON KK
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