Developer carrying member, process cartridge, and electrophotographic image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsKineo Takeno, Kazuhito Wakabayashi, Atsushi Noguchi
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Abstract
Provided is a developer carrying member that can stably form a high-quality electrophotographic image. The developer carrying member includes an electroconductive support and a surface layer in the stated order, wherein the surface layer contains a binder resin and electroconductive particles, and a content of the electroconductive particles in a region from a surface of the surface layer opposite to an outer surface thereof on a side facing the electroconductive support to a depth of 150 nm is 1% or more and 25% or less, and wherein the surface layer has a volume resistivity of 1.0×10−2 Ω·cm or more and 1.0×102Ω·cm or less.
Claims9
A developer carrying member comprising:
- an electroconductive support;
- and
- a surface layer in the stated order,
- wherein the surface layer contains a binder resin and electroconductive particles, and a content of the electroconductive particles in a region from a first surface of the surface layer opposite to a second surface thereof on a side facing the electroconductive support to a depth of 150 nm is 1% or more and 25% or less, and
- wherein the surface layer has a volume resistivity of 1.0×10−2 Ω·cm or more and 1.0×102Ω·cm or less.
A process cartridge removably mounted onto a main body of an electrophotographic apparatus, the process cartridge comprising at least:
- a toner container containing toner;
- and
- a developer carrying member configured to convey the toner,
- wherein the developer carrying comprises member comprises an electroconductive support and a surface layer in the stated order,
- the surface layer contains a binder resin and electroconductive particles,
- a content of the electroconductive particles in a region from a first surface of the surface layer opposite to a second surface thereof on a side facing the electroconductive support to a depth of 150 nm is 1% or more and 25% or less, and
- wherein the surface layer has a volume resistivity of 1.0×10−2 Ω·cm or more and 1.0×102Ω·cm or less.
An electrophotographic image forming apparatus comprising at least:
- an electrophotographic photosensitive member;
- a charging member arranged so as to be capable of charging the electrophotographic photosensitive member;
- and
- a developer carrying member configured to supply toner to the electrophotographic photosensitive member,
- wherein the developer carrying member comprises an electroconductive support and a surface layer in the stated order,
- the surface layer contains a binder resin and electroconductive particles,
- a content of the electroconductive particles in a region from a first surface of the surface layer opposite to a second surface thereof on a side facing the electroconductive support to a depth of 150 nm is 1% or more and 25% or less, and
- wherein the surface layer has a volume resistivity of 1.0×10−2 Ω·cm or more and 1.0×102Ω·cm or less.
Dependencies are inferred from the claim text.