Doctor blade surface energy modification
View Patent ↗The present disclosure relates to a surface energy reduction material in the form of a topcoat or additive to a coating that may be applied to a toner regulating member such as a doctor blade which may reduce toner build-up about a nip region, pre-nip region, and/or post-nip region. The surface energy reduction material may be include any material having a surface energy of less than or equal to 35 dynes/cm, for example, between 15-30 dynes/cm, including all values and ranges therein. The surface energy reducing materials may include any material that provides a 25% or more reduction of the surface energy of the doctor blade compared to an untreated doctor blade, for example, greater than or equal to 50% reduction or greater than or equal to 75% reduction, including all values and ranges therein.
1. An electrophotographic image forming device comprising:
a toner carrier;
a toner regulating member supported against the toner carrier wherein the toner regulating member defines at least one of a pre-nip region, a nip region and a post-nip region; and
the region comprises a surface energy reducing material forming an outer layer of the toner regulating member having a thickness between about 0.005 microns and about 0.01 microns.
2. The device of claim 1 wherein:
the region has a surface energy less than or equal to 35 dynes/cm.
3. The device of claim 1 wherein:
the region has a surface energy between 30-15 dynes/cm.
4. The device of claim 1 wherein:
the surface energy reducing material comprises a hydrocarbon polymer.
5. The device of claim 1 wherein:
the surface energy reducing material is provided in the form of a coating on the toner regulating member.
6. The device of claim 1 wherein:
the toner regulating member comprises a doctor blade.
7. The device of claim 6 wherein:
the doctor blade comprises at least one of a compliant coated abrasive blade, a cantilevered blade; a radiused metal blade and a rigid blade.
8. The device of claim 1 , wherein the surface energy reducing material comprises at least one of a silane compound and a siloxane compound.
9. The device of claim 1 , wherein the surface energy reducing material comprises at least one silane.
10. The device of claim 1 , wherein the surface energy reducing material comprises at least one siloxane compound in an alcohol base.
11. A toner regulating device for electrophotographic image forming comprising:
a doctor blade having a surface defining at least one of a pre-nip region, a nip region and a post-nip region when the doctor blade is supported against a toner carrier; and
the region comprises a surface energy reducing material having a surface energy of less than or equal to 35 dynes/cm and comprises an outer layer of the doctor blade having a thickness between about 0.005 microns and about 0.01 microns on the surface of the doctor blade.
12. The device of claim 11 wherein:
the region has a surface energy is between 30-15 dynes/cm.
13. The device of claim 11 wherein:
the surface energy reducing material comprises a hydrocarbon polymer.
14. The device of claim 11 wherein:
the surface energy reducing material is provided in the form of a coating on the doctor blade.
15. The device of claim 11 wherein:
the doctor blade comprises at least one of a compliant coated abrasive blade, a cantilevered blade; a radiused metal blade and a rigid blade.
16. The toner regulating device of claim 11 , wherein the surface energy reducing material comprises at least one of a silane compound and a siloxane compound.
17. The toner regulating device of claim 11 , wherein the surface energy reducing material comprises at least one silane.
18. The toner regulating device of claim 11 , wherein the surface energy reducing material comprises at least one siloxane compound in an alcohol base.