Electrophotographic photoconductor, manufacturing method thereof, and electrophotographic apparatus using the same
Provided is a positively charged electrophotographic photoconductor, a manufacturing method thereof, and an electrophotographic apparatus using the same. The positively charged electrophotographic photoconductor includes an electroconductive support and a single layer-type photosensitive layer provided thereon including a charge generation material, a hole transport material, an electron transport material, and a mixed binder resin. Alternately, the positively charged electrophotographic photoconductor includes an electroconductive support; a charge transport layer provided on the electroconductive support and containing at least a hole transport material, and a binder resin; and a charge generation layer provided on the charge transport layer and including at least a charge generation material, a hole transport material, an electron transport material, and a mixed binder resin. In either embodiment, the mixed binder resin contains at least two resins including a polycarbonate-based resin selected to provide the mixed binder resin with a water vapor permeability ranging from 5 to 13 g/m 2 ·day.
1. A positively charged electrophotographic photoconductor, comprising
an electroconductive support; and
a single layer-type photosensitive layer provided on the electroconductive support and including a charge generation material, a hole transport material, an electron transport material, and a mixed binder resin that comprises at least two resins including a polycarbonate-based resin,
wherein the at least two resins are selected to provide the mixed binder resin with a water vapor permeability ranging from 5 to 13 g/m 2 ·day.
2. The electrophotographic photoconductor according to claim 1 , wherein the mixed binder resin contains a resin having a repeating unit represented by formula (1) below:
3. The electrophotographic photoconductor according to claim 1 , wherein the mixed binder resin contains a resin having a repeating unit represented by formula (1) below and a repeating unit represented by formula (2) below:
4. The electrophotographic photoconductor according to claim 1 , wherein the mixed binder resin contains a resin having a repeating unit represented by formula (2) below and a repeating unit represented by formula (3) below:
5. The electrophotographic photoconductor according to claim 1 , wherein the charge generation material comprises at least titanyl phthalocyanine.
6. A method of producing the electrophotographic photoconductor according to claim 1 , wherein the single layer-type photosensitive layer containing a mixed binder resin is formed by a dip coating method.
7. An electrophotographic apparatus equipped with the electrophotographic photoconductor according to claim 1 .
8. The electrophotographic apparatus according to claim 7 ,
wherein the electrophotographic apparatus is equipped with a contact developing system that is a nonmagnetic one-component contact developing system using polymerized toner in a cleaner-less process.
9. The positively charged electrophotographic photoconductor according to claim 1 , wherein the mixed binder resin contains a resin having a repeating unit represented by formula (1) or formula (2) below and a repeating unit represented by formula (3) below:
10. A positively charged electrophotographic photoconductor, comprising:
an electroconductive support;
a charge transport layer provided on the electroconductive support and containing at least a hole transport material and a binder resin; and
a charge generation layer provided on the charge transport layer and including at least a charge generation material, a hole transport material, an electron transport material, and a mixed binder resin that comprises at least two resins including a polycarbonate-based resin,
wherein the at least two resins are selected to provide the mixed binder resin of the charge generation layer with a water vapor permeability ranging from 5 to 13 g/m 2 ·day.
11. The electrophotographic photoconductor according to claim 10 , wherein the mixed binder resin contains a resin having a repeating unit represented by formula (1) below:
12. The electrophotographic photoconductor according to claim 10 , wherein the mixed binder resin contains a resin having a repeating unit represented by formula (1) below and a repeating unit represented by formula (2) below:
13. The electrophotographic photoconductor according to claim 10 , wherein the mixed binder resin contains a resin having a repeating unit represented by formula (2) below and a repeating unit represented by formula (3) below:
14. The electrophotographic photoconductor according to claim 10 , wherein the charge generation material comprises at least titanyl phthalocyanine.
15. A method of producing the electrophotographic photoconductor according to claim 10 , wherein the charge generation layer containing a mixed binder resin is formed by a dip coating method.
16. An electrophotographic apparatus equipped with the electrophotographic photoconductor according to claim 10 .
17. The electrophotographic apparatus according to claim 16 ,
wherein the electrophotographic apparatus is equipped with a contact developing system that is a nonmagnetic one-component contact developing system using polymerized toner in a cleaner-less process.
18. The positively charged electrophotographic photoconductor, according to claim 10 , wherein the mixed binder resin in the charge generation layer contains a resin having a repeating unit represented by formula (1) or formula (2) below and a repeating unit represented by formula (3) below:
19. The positively charged electrophotographic photoconductor, according to claim 10 , wherein the water vapor permeability of the binder resin of the charge transport layer is 4 g/m 2 ·day or less.