ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, MANUFACTURING METHOD OF ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS
First Claim
1. An electrophotographic photosensitive member comprising:
- a support, an undercoat layer, a charge generation layer adjacent to the undercoat layer, and a hole transporting layer disposed in this order,the undercoat layer containing(1) silica particles and a polymer of a composition comprising an electron transporting material having a polar group selected from the group consisting of a hydroxy group, a thiol group, an amino group, a carboxy group and a methoxy group, and a cross-linking agent, and a content of the electron transporting material in the composition being 30 mass % or more and 70 mass % or less relative to the total mass of the composition;
or(2) silica particles and an electron transporting material comprising a polar group selected from the group consisting of a hydroxy group, a thiol group, an amino group, a carboxy group and a methoxy group, and a binder resin, and a content of the electron transporting material in the undercoat layer being 30 mass % or more and 70 mass % or less relative to the total mass of the electron transporting material and the binder resin; and
a content of the silica particles in the undercoat layer being 1 mass % or more and 30 mass % or less relative to the total mass of the electron transporting material.
1 Assignment
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Accused Products
Abstract
An electrophotographic photosensitive member comprises a support, an undercoat layer, a charge generation layer and a hole transporting layer disposed in this order. The undercoat layer contains silica particles and a polymer of a composition including an electron transporting material having a polar group selected from the group consisting of a hydroxy group, a thiol group, an amino group, a carboxy group and a methoxy group, and a cross-linking agent. The content of the electron transporting material in the composition is 30 to 70 mass % relative to the total mass of the composition and the content of the silica particles in the undercoat layer is 1 to 30 mass % relative to the total mass of the electron transporting material.
3 Citations
9 Claims
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1. An electrophotographic photosensitive member comprising:
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a support, an undercoat layer, a charge generation layer adjacent to the undercoat layer, and a hole transporting layer disposed in this order, the undercoat layer containing (1) silica particles and a polymer of a composition comprising an electron transporting material having a polar group selected from the group consisting of a hydroxy group, a thiol group, an amino group, a carboxy group and a methoxy group, and a cross-linking agent, and a content of the electron transporting material in the composition being 30 mass % or more and 70 mass % or less relative to the total mass of the composition;
or(2) silica particles and an electron transporting material comprising a polar group selected from the group consisting of a hydroxy group, a thiol group, an amino group, a carboxy group and a methoxy group, and a binder resin, and a content of the electron transporting material in the undercoat layer being 30 mass % or more and 70 mass % or less relative to the total mass of the electron transporting material and the binder resin; and a content of the silica particles in the undercoat layer being 1 mass % or more and 30 mass % or less relative to the total mass of the electron transporting material. - View Dependent Claims (2, 3, 4, 5)
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6. A method for manufacturing an electrophotographic photosensitive member having a support, an undercoat layer, a charge generation layer adjacent to the undercoat layer, and a hole transporting layer disposed in this order, comprising:
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forming a coating film from a coating liquid for forming an undercoat layer containing (1) silica particles and a composition comprising an electron transporting material having a polar group selected from the group consisting of a hydroxy group, a thiol group, an amino group, a carboxy group and a methoxy group, and a cross-linking agent, wherein a content of the electron transporting material in the composition is 30 mass % or more and 70 mass % or less relative to the total mass of the composition and a content of the silica particles in the coating liquid for forming an undercoat layer is 1 mass % or more and 30 mass % or less relative to the total mass of the electron transporting material;
or(2) silica particles and an electron transporting material comprising a polar group selected from the group consisting of a hydroxy group, a thiol group, an amino group, a carboxy group and a methoxy group, and a binder resin, wherein a content of the electron transporting material in the coating liquid for forming an undercoat layer is 30 mass % or more and 70 mass % or less relative to the total mass of the electron transporting material and the binder resin and a content of the silica particles in the coating liquid for forming an undercoat layer is 1 mass % or more and 30 mass % or less relative to the total mass of the electron transporting material; and forming the undercoat layer by heating and drying the coating film. - View Dependent Claims (7)
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8. A process cartridge detachably detachable to the main body of an electrophotographic apparatus comprising:
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an electrophotographic photosensitive member and at least one unit selected from the group consisting of a charging unit, a developing unit and a cleaning unit integrally supported therein, the electrophotographic photosensitive member comprising; a support, an undercoat layer, a charge generation layer adjacent to the undercoat layer, and a hole transporting layer disposed in this order; the undercoat layer containing (1) silica particles and a polymer of a composition comprising an electron transporting material having a polar group selected from the group consisting of a hydroxy group, a thiol group, an amino group, a carboxy group and a methoxy group, and a cross-linking agent, and a content of the electron transporting material in the composition being 30 mass % or more and 70 mass % or less relative to the total mass of the composition;
or(2) silica particles and an electron transporting material comprising a polar group selected from the group consisting of a hydroxy group, a thiol group, an amino group, a carboxy group and a methoxy group, and a binder resin, and a content of the electron transporting material in the undercoat layer being 30 mass % or more and 70 mass % or less relative to the total mass of the electron transporting material and the binder resin; and a content of the silica particles in the undercoat layer being 1 mass % or more and 30 mass % or less relative to the total mass of the electron transporting material.
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9. An electrophotographic apparatus comprising:
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an electrophotographic photosensitive member, a charging unit, an exposure unit, a developing unit and a transferring unit, the electrophotographic photosensitive member comprising; a support, an undercoat layer, a charge generation layer adjacent to the undercoat layer, and a hole transporting layer disposed in this order; the undercoat layer containing (1) silica particles and a polymer of a composition comprising an electron transporting material having a polar group selected from the group consisting of a hydroxy group, a thiol group, an amino group, a carboxy group and a methoxy group, and a cross-linking agent, and a content of the electron transporting material in the composition being 30 mass % or more and 70 mass % or less relative to the total mass of the composition;
or(2) silica particles and an electron transporting material comprising a polar group selected from the group consisting of a hydroxy group, a thiol group, an amino group, a carboxy group and a methoxy group, and a binder resin, and a content of the electron transporting material in the undercoat layer being 30 mass % or more and 70 mass % or less relative to the total mass of the electron transporting material and the binder resin; and a content of the silica particles in the undercoat layer being 1 mass % or more and 30 mass % or less relative to the total mass of the electron transporting material.
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Specification