Member for electrophotography, developing apparatus, and electrophotographic apparatus
First Claim
1. A member for electrophotography, comprising:
- a support;
an electro-conductive elastic layer on the support; and
a plurality of electrically insulating domains on the electro-conductive elastic layer, whereina surface of the member for electrophotography includes surfaces of the electrically insulating domains with an exposed portion of the electro-conductive elastic layer free of being covered by the electrically insulating domains, andthe electrically insulating domains contain a resin having a structure represented by formula (1);
AnR
(1)where n represents an integer of 2 or more, R represents a linking group that links n pieces of A and the linking group R contains an oligomer component of at least one resin selected from the group consisting of polyurethane, polyester, an epoxy resin, and polybutadiene, and A represents a structure represented by formula (2);
1 Assignment
0 Petitions
Accused Products
Abstract
Provided is a member for electrophotography that enables stable formation of a high-quality electrophotographic image even when used as a developing member over a long period of time. The member for electrophotography includes: a support; an electro-conductive elastic layer on the support; and a plurality of electrically insulating domains on the electro-conductive elastic layer, in which a surface of the member for electrophotography includes surfaces of the electrically insulating domains and an exposed portion of the electro-conductive elastic layer free of being covered by the electrically insulating domains, and in which the electrically insulating domains each contain a resin having a specific structure.
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Citations
6 Claims
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1. A member for electrophotography, comprising:
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a support; an electro-conductive elastic layer on the support; and a plurality of electrically insulating domains on the electro-conductive elastic layer, wherein a surface of the member for electrophotography includes surfaces of the electrically insulating domains with an exposed portion of the electro-conductive elastic layer free of being covered by the electrically insulating domains, and the electrically insulating domains contain a resin having a structure represented by formula (1);
AnR
(1)where n represents an integer of 2 or more, R represents a linking group that links n pieces of A and the linking group R contains an oligomer component of at least one resin selected from the group consisting of polyurethane, polyester, an epoxy resin, and polybutadiene, and A represents a structure represented by formula (2); - View Dependent Claims (2, 3)
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4. A member for electrophotography comprising:
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a support; an electro-conductive elastic layer on the support; and a plurality of electrically insulating domains on the electro-conductive elastic layer, wherein a surface of the member for electrophotography includes surfaces of the electrically insulating domains with an exposed portion of the electro-conductive elastic layer free of being covered by the electrically insulating domains, and the electrically insulating domains contain a resin having a structure represented by formula (1);
AnR
(1)where n represents an integer of 2 or more, R represents a linking group that links n pieces of A, and A represents a structure represented by formula (2);
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5. A developing apparatus, comprising a developing member, the developing member comprising:
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a support; an electro-conductive elastic layer on the support; and a plurality of electrically insulating domains on the electro-conductive elastic layer, wherein a surface of the member for electrophotography includes surfaces of the electrically insulating domains with an exposed portion of the electro-conductive elastic layer free of being covered by the electrically insulating domains, and the electrically insulating domains contain a resin having a structure represented by formula (1);
AnR
(1)where n represents an integer of 2 or more, R represents a linking group that links n pieces of A and the linking group R contains an oligomer component of at least one resin selected from the group consisting of polyurethane, polyester, an epoxy resin, and polybutadiene, and A represents a structure represented by formula (2);
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6. A developing apparatus comprising a developing member, the developing member comprising:
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a support; an electro-conductive elastic layer on the support; and a plurality of electrically insulating domains on the electro-conductive elastic layer, wherein a surface of the member for electrophotography includes surfaces of the electrically insulating domains with an exposed portion of the electro-conductive elastic layer free of being covered by the electrically insulating domains, and the electrically insulating domains contain a resin having a structure represented by formula (1);
AnR
(1)where n represents an integer of 2 or more, and R represents a linking group that links n pieces of A, and A represents a structure represented by formula (2);
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Specification