Charging member, and image-forming apparatus and process...

Details Charging member, and image-forming apparatus and process... Charging member, and image-forming apparatus and process...

2005-10-04

2005-10-04

Kruer, Kevin R. (Department: 1773)

Stock material or miscellaneous articles

Composite

Of epoxy ether

C428S521000, C523S437000, C523S513000, C399S111000, C399S168000, C399S310000

Reexamination Certificate

active

06951688

ABSTRACT:
The present invention relates to a charging member for charging a surface of a member to be charged in an image forming apparatus, and one aspect of the present invention provides a charging member having an outermost surface layer containing a conductive elastic material. The conductive elastic material comprises a polymer including a polar polymer, primarily including (i) acrylonitrile butadiene rubber, (ii) an ethylene oxide-propylene oxide-allyl glycidyl ether terpolymer, and (iii) a homopolymer of epichlorohydrin. The weights x, y and z of the components (i), (ii) and (iii), respectively, have a relationship of 0.2<y/(x+y+z)≦0.5 and 4<y/z≦20. This charging member can realize uniform charging and is small in resistance variation, even when used for a long time.

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