Charging unit, manufacturing method for charging unit, process cartridge and image forming device
View Patent ↗A charging unit is provided, the charging unit including: a charging member; and a charging member clean-up member having an elastic layer, the elastic layer containing a silicon oil, wherein a silicone concentration in analyzing the charging member by an x-ray photoelectron spectroscopy satisfies following condition: about 1 atm %≦(difference between the maximum value and the minimum value of the silicone concentration in Si2p detected by the x-ray photoelectron spectroscopy above the charging member)≦about 3 atm %.
1. A charging unit, comprising:
a charging member; and
a charging member clean-up member having an elastic layer, the elastic layer containing a silicon oil,
wherein a silicone concentration in analyzing the charging member by an x-ray photoelectron spectroscopy satisfies following condition:
about 1 atm %≦(difference between the maximum value and the minimum value of the silicone concentration in Si2p detected by the x-ray photoelectron spectroscopy above the charging member)≦about 3 atm %.
2. The charging unit according to claim 1 ,
wherein the silicone concentration in analyzing the charging member by the x-ray photoelectron spectroscopy satisfies following condition:
about 1 atm %≦(difference between the maximum value and the minimum value of the silicone concentration in Si2p detected by the x-ray photoelectron spectroscopy above the charging member)≦about 2 atm %.
3. The charging unit according to claim 1 ,
wherein the elastic layer contains a urethane foam.
4. The charging unit according to claim 1 ,
wherein the elastic layer contains a polyether based polyurethane.
5. The charging unit according to claim 1 ,
wherein the charging member clean-up member includes a core and the elastic layer, and
the elastic layer is a cylindrical elastic layer formed around a periphery of the core.
6. A method for manufacturing the charging unit according to claim 1 , comprising:
manufacturing a charging member clean-up member, the manufacturing process including forming an elastic layer and cleaning the elastic layer.
7. A process cartridge, comprising:
an image carrier and the charging unit according to claim 1 .
8. An image forming device, comprising:
an image carrier;
the charging unit according to claim 1 ;
a latent image forming unit that forms a latent image on a surface of the image carrier;
a development unit that develops the latent image formed on the surface of the image carrier with a toner to form a toner image; and
a transfer unit that transfers the toner image formed on the surface of the image carrier to a transferred body.
9. A charging unit, comprising:
a charging member; and
a charging member clean-up member having an elastic layer, the elastic layer containing a silicon oil,
wherein a silicone concentration in analyzing a contact part and a non-contact part of the charging member with the elastic layer by an x-ray photoelectron spectroscopy in a state where the elastic layer of the charging member clean-up member in unused state and the charging member in unused state are contacted for one day or more satisfies the following condition:
about 1 atm %≦(difference in the silicone concentration in Si2p between the contact part and the non-contact part of the charging member with the elastic layer detected by the x-ray photoelectron spectroscopy above the charging member)≦about 3 atm %.
10. The charging unit according to claim 9 ,
wherein the silicone concentration in analyzing a contact part and a non-contact part of the charging member with the elastic layer by an x-ray photoelectron spectroscopy in a state where the elastic layer of the charging member clean-up member in unused state and the charging member in unused state are contacted for one day or more satisfies the following condition:
about 1 atm %≦(difference in the silicone concentration in Si2p between the contact part and the non-contact part of the charging member with the elastic layer detected by the x-ray photoelectron spectroscopy above the charging member)≦about 2 atm %.
11. The charging unit according to claim 9 ,
wherein the elastic layer contains a urethane foam.
12. The charging unit according to claim 9 ,
wherein the elastic layer contains a polyether based polyurethane.
13. The charging unit according to claim 9 ,
wherein the charging member clean-up member includes a core and the elastic layer, and
the elastic layer is a cylindrical elastic layer formed around a periphery of the core.
14. A method for manufacturing the charging unit according to claim 9 , comprising:
manufacturing a charging member clean-up member, the manufacturing process including forming an elastic layer and cleaning the elastic layer.
15. A process cartridge, comprising:
an image carrier and the charging unit according to claim 9 .
16. An image forming device, comprising:
an image carrier;
the charging unit according to claim 9 ;
a latent image forming unit that forms a latent image on a surface of the image carrier;
a development unit that develops the latent image formed on the surface of the image carrier with a toner to form a toner image; and
a transfer unit that transfers the toner image formed on the surface of the image carrier to a transferred body.