Electrophotographic Photosensitive Body

Abstract
Disclosed is an electrophotographic photoreceptor which is excellent in wear resistance and electrical characteristics. Specifically disclosed is an electrophotographic photoreceptor containing a polyester resin in a photosensitive layer provided on an electroconductive substrate. The polyester resin is composed of a copolymer represented by the general formula 1 below, which has a viscosity average molecular weight (Mv) of 10,000-300,000 and contains a diphenyl ether 4,4′-dicarboxylic acid component and a bivalent phenol component.
Description

BRIEF DESCRIPTION OF THE DRAWINGS


FIG. 1 is a view for explaining an image forming device.





DESCRIPTION OF REFERENCE NUMERALS AND SIGNS


1 . . . electrophotographic photoreceptor, 2 . . . charging device (charging roller), 3 . . . exposing device, 4 . . . developing device, 5 . . . transfer device, 6 . . . cleaning device, 7 . . . fixing device, 41 . . . developing tank, 42 . . . agitators, 43 . . . supplying roller, 44 . . . developing roller, 45 . . . restricting member, 71 . . . upper fixing member(fixing roller), 72 . . . lower fixing member (fixing roller), 73 . . . heating device

Claims
  • 1. An electrophotographic photoreceptor comprising: an electroconductive substrate; anda photosensitive layer provided on the electroconductive substrates whereinthe photosensitive layer comprises a polyester resin containing at least one of the repeating units represented by the following general formulae 1 to 5,
  • 2. The electrophotographic photoreceptor according to claim 1, wherein A in the general formulae 1 to 5 is derived from diphenyl ether dicarboxylic acid.
  • 3. The electrophotographic photoreceptor according to claim 1, wherein A in the general formulae 1 to 5 is derived from one selected from the group consisting of diphenyl ether 2,2′ -dicarboxylic acid, diphenyl ether 2,4-dicarboxylic acid, and diphenyl ether 4,4′-dicarboxylic acid.
  • 4. The electrophotographic photoreceptor according to claim 1, wherein A in the general formulae 1 to 5 is derived from diphenyl ether 4,4′-dicarboxylic acid.
  • 5. The electrophotographic photoreceptor according to claim 1, wherein B in the general formula 1 is derived from one selected from the group consisting of bis(4-hydroxyphenyl)methane,
  • 6. The electrophotographic photoreceptor according to claim 1, wherein B in the general formula 1 is derived from bis(4-hydroxy-3-methylphenyl)methane.
  • 7. The electrophotographic photoreceptor according to claim 1, wherein C in the general formula 2 is derived from one selected from the group consisting of 1,1-bis(4-hydroxyphenyl)ethane,
  • 8. The electrophotographic photoreceptor according to claim 1, wherein C in the general formula 2 is derived from 1,1-bis(4-hydroxy-3-methylphenyl)ethane.
  • 9. The electrophotographic photoreceptor according to claim 1, wherein D in the general formula 3 is derived from one selected from the group consisting of
  • 10. The electrophotographic photoreceptor according to claim 1, wherein E in the general formula 4 is derived from one selected from the group consisting of bis(4-hydroxyphenyl)ether,
  • 11. The electrophotographic photoreceptor according to claim 1, wherein E in the general formula 4 is derived from bis(4-hydroxyphenyl)ether.
  • 12. The electrophotographic photoreceptor according to claim 1, wherein G in the general formula 5 is derived from aromatic dicarboxylic acid.
  • 13. The electrophotographic photoreceptor according to claim 1, wherein G in the general formula 5 is derived from one selected from the group consisting of isophthalic acid and terephthalic acid.
  • 14 The electrophotographic photoreceptor according to claim 1, wherein the polyester resin has the repeating units represented by the general formula 2.
  • 15. The electrophotographic photoreceptor according to claim 1, wherein the photosensitive layer further contains a compound represented by the following general formula 6.
  • 16. The electrophotographic photoreceptor according to claim 1, wherein the polyester resin has a viscosity-average molecular weight (Mv) of 10,000 to 300,000.
  • 17. A photoreceptor cartridge to be attached to an image forming device, the photoreceptor cartridge comprising: the electrophotographic photoreceptor as set forth in claim 1; andat least one device selected from the group consisting of a charging device for charging the electrophotographic photoreceptor at a predetermined potential a developing device for supplying toner on a surface of the electrophotographic photoreceptor, and a cleaning device for scraping off and collecting residual toner adhered on the surface of the electrophotographic photoreceptor.
  • 18. An image forming device comprising: the electrophotographic photoreceptor as set forth in claim 1;a charging device for charging the electrophotographic photoreceptor;an exposing device for forming an electrostatic latent image on a photosensitive surface of the electrophotographic photoreceptor;a developing device for supplying toner on a surface of the electrophotographic photoreceptor;a transporting device for transferring a toner image formed on the electrophotographic photoreceptor onto a sheet of recording paper; anda fixing device for fixing the toner image transferred onto the recording paper.
Priority Claims (1)
Number Date Country Kind
2004-210571 Jul 2004 JP national
PCT Information
Filing Document Filing Date Country Kind 371c Date
PCT/JP05/13187 7/15/2005 WO 00 1/12/2007