Electrophotographic Photoreceptor, Process Cartridge, And Image-Forming Apparatus

A technology for electrophotography and photoreceptors, which is applied in the field of process boxes, image forming devices, and electrophotographic photoreceptors, and can solve problems such as end wear of photosensitive layers

Active Publication Date: 2018-03-27
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the image forming apparatus of the contact development method, the end portion of the photosensitive layer in the axial direction of the electrophotographic photoreceptor in contact with each axial edge of the developer holding member may become worn

Method used

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  • Electrophotographic Photoreceptor, Process Cartridge, And Image-Forming Apparatus
  • Electrophotographic Photoreceptor, Process Cartridge, And Image-Forming Apparatus
  • Electrophotographic Photoreceptor, Process Cartridge, And Image-Forming Apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0235] 100 parts by weight of zinc oxide (average particle diameter: 70 nm, specific surface area: 15 m 2 / g) was stirred and mixed with 500 parts by weight of methanol. To the resulting mixture was added 0.75 parts by weight of a silane coupling agent "KBM603" manufactured by Shin-Etsu Chemical Co., Ltd., and then the mixture was stirred for 2 hours. The mixture was then distilled under reduced pressure to remove methanol. Subsequently, it was baked at 120° C. for 3 hours. Thus, zinc oxide particles having surfaces treated with a silane coupling agent were prepared.

[0236] 85 parts by weight of methyl ethyl ketone, 60 parts by weight of surface-treated zinc oxide particles, 1.2 parts by weight of alizarin as a reactive acceptor substance, and a curing agent produced by Sumitomo Bayer Polyurethane Co., Ltd. (SumitomoBayer Urethane Co., Ltd.) 13.5 parts by weight of blocked isocyanate "Sumidur 3173" and 15 parts by weight of butyral resin manufactured by Sekisui Chemical C...

Embodiment 2 to 4 and comparative example 1 to 4

[0246] In Examples 2 to 4 and Comparative Examples 1 to 4, photoreceptors were prepared as in Example 1 except that the following charge transport layer formation conditions were changed as described in Table 1:

[0247] 1) Type of binder resin,

[0248] 2) the content of the solvent in the coating liquid for forming the charge transport layer, and

[0249] 3) Drying conditions in the formation of the charge transport layer, that is, specifically, the drying temperature of the portion of the coating film corresponding to the end A of the charge transport layer, that is, the photosensitive layer (in Table 1, referred to as "end A drying temperature"), the drying temperature of the part of the coating film corresponding to the other end B of the charge transport layer, that is, the photosensitive layer (in Table 1, referred to as "the drying temperature of the other end B"), and the That is, the drying temperature of the part of the coating film corresponding to the central par...

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Abstract

The invention provides an electrophotographic photoreceptor, a process cartridge, and an image-forming apparatus. The electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer disposed on the conductive substrate which serves as an outermost surface of the electrophotographic photoreceptor. The electrophotographic photoreceptor satisfies YC-YA>=0.1 MPa, YC-YB>=0.1 MPa, and YC<=4.5 MPa, where YA, YB, and YC (MPa) represent the Young's moduli of a surface of the photosensitive layer determined by nanoindentation at an indentation depth of 500 nm at end portionsA and B extending from a position 10 mm to a position 70 mm from the respective edges of the photosensitive layer toward the center of the photosensitive layer in an axial direction of the electrophotographic photoreceptor and a central portion C extending from a position 20 mm in front of and to a position 20 mm behind the center of the photosensitive layer in the axial direction of the electrophotographic photoreceptor, respectively.

Description

technical field [0001] The present invention relates to an electrophotographic photoreceptor, a process cartridge, and an image forming apparatus. Background technique [0002] Electrophotographic image forming devices have been used as image forming devices included in copiers or laser beam printers. An electrophotographic image forming device includes an electrophotographic photoreceptor. [0003] For example, Japanese Patent Laid-Open No. 2013-178367 discloses an electrophotographic photoreceptor including a protective layer formed by curing a film composed of a composition including at least A compound and at least one charge transport material comprising -OH, -OCH 3 , -NH 2 , at least one substituent of -SH and -COOH, the protective layer has an elastic deformation rate of 45% to 55% and a Young's modulus of 2.8GPa to 3.7GPa. [0004] There is known an image forming apparatus of a contact development method in which a developer formed on the surface of an electropho...

Claims

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Application Information

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IPC IPC(8): G03G5/147
CPCG03G5/14756G03G5/0564G03G5/0607G03G5/0618G03G5/062G03G5/14791G03G5/14795G03G5/047G03G21/18
Inventor 川崎晃弘
Owner FUJIFILM BUSINESS INNOVATION CORP
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