Conductive member for electrophotographic machine
To provide a conductive member for an electrophotographic machine that is capable of preventing hardening degradation of a surface layer that is caused by an ionic conductive agent contained in a conductive rubber elastic body layer, allowing the surface layer to be improved in durability. A conductive member 10 for an electrophotographic machine includes a conductive rubber elastic body layer 14 containing crosslinked rubber and an ionic conductive agent, and a surface layer 16 provided on an outer periphery of the conductive rubber elastic body layer 14 , wherein the surface layer 16 contains a polymer and polyphenol. Examples of the polyphenol include a tannin, gallic acid, ellagic acid, pyrogallol, catechin, and chlorogenic acid.
1. A conductive member for an electrophotographic machine, the member comprising:
a conductive rubber elastic body layer comprising a crosslinked rubber and an ionic conductive agent; and
a surface layer provided on an outer periphery of the conductive rubber elastic body layer, the surface layer comprising:
a polymer; and
a polyphenol.
2. The conductive member for an electrophotographic machine according to claim 1 ,
wherein the ionic conductive agent comprises anions that comprise one or more kinds selected from the group consisting of perchlorate anions, bis(trifluoromethanesulfonyl)imide anions, trifluoromethanesulfonate anions, chloride anions, bromide anions, and p-toluenesulfonate anions.
3. The conductive member for an electrophotographic machine according to claim 2 ,
wherein the polyphenol comprises one or more kinds selected from the group consisting of a tannin, gallic acid, ellagic acid, pyrogallol acid, catechin, and chlorogenic acid.
4. The conductive member for an electrophotographic machine according to claim 3 , wherein the tannin comprises a hydrolyzable tannin.
5. The conductive member for an electrophotographic machine according to claim 4 , wherein the surface layer comprises a nylon.
6. The conductive member for an electrophotographic machine according to claim 5 , wherein the surface layer comprises N-methoxymethylated nylon.
7. The conductive member for an electrophotographic machine according to claim 6 , wherein the anions comprise the perchlorate anions.
8. The conductive member for an electrophotographic machine according to claim 7 , wherein the conductive member is a charging roll.
9. The conductive member for an electrophotographic machine according to claim 6 , wherein the anions comprise the bis(trifluoromethanesulfonyl)imide anions.
10. The conductive member for an electrophotographic machine according to claim 9 , wherein the conductive member is a charging roll.
11. The conductive member for an electrophotographic machine according to claim 2 , wherein the anions comprise perchlorate anions.
12. The conductive member for an electrophotographic machine according to claim 11 , wherein the conductive member is a charging roll.
13. The conductive member for an electrophotographic machine according to claim 2 , wherein the anions comprise the bis(trifluoromethanesulfonyl)imide anions.
14. The conductive member for an electrophotographic machine according to claim 1 ,
wherein the polyphenol comprises one or more kinds selected from the group consisting of a tannin, gallic acid, ellagic acid, pyrogallol acid, catechin, and chlorogenic acid.
15. The conductive member for an electrophotographic machine according to claim 14 , wherein the tannin comprises a hydrolyzable tannin.
16. The conductive member for an electrophotographic machine according to claim 15 , wherein the conductive member is a charging roll.
17. The conductive member for an electrophotographic machine according to claim 1 , wherein the surface layer comprises a nylon.
18. The conductive member for an electrophotographic machine according to claim 17 , wherein the surface layer comprises N-methoxymethylated nylon.
19. The conductive member for an electrophotographic machine according to claim 18 , wherein the conductive member is a charging roll.
20. The conductive member for an electrophotographic machine according to claim 1 , wherein the conductive member is a charging roll.