Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
First Claim
1. An electrophotographic photosensitive member comprising a support, and provided thereon a photosensitive layer, wherein;
- a surface layer of the electrophotographic photosensitive member contains a high-molecular-weight charge-transporting material having a weight-average molecular weight Mw of from 1,000 or more to 9,000 or less; and
the ratio of the weight-average molecular weight Mw of the high-molecular-weight charge-transporting material to a number-average molecular weight Mn of the high-molecular-weight charge-transporting material, Mw/Mn, is from more than 1.00 to 1.10 or less.
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Accused Products
Abstract
In an electrophotographic photosensitive member having a support, and provided thereon a photosensitive layer, a surface layer of the electrophotographic photosensitive member contains a high-molecular-weight charge-transporting material having a weight-average molecular weight Mw of from 1,000 or more to 9,000 or less, and the ratio of the weight-average molecular weight Mw of the high-molecular-weight charge-transporting material to a number-average molecular weight Mn of the high-molecular-weight charge-transporting material, Mw/Mn, is from more than 1.00 to 1.10 or less. Also disclosed are a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member.
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Citations
11 Claims
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1. An electrophotographic photosensitive member comprising a support, and provided thereon a photosensitive layer, wherein;
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a surface layer of the electrophotographic photosensitive member contains a high-molecular-weight charge-transporting material having a weight-average molecular weight Mw of from 1,000 or more to 9,000 or less; and
the ratio of the weight-average molecular weight Mw of the high-molecular-weight charge-transporting material to a number-average molecular weight Mn of the high-molecular-weight charge-transporting material, Mw/Mn, is from more than 1.00 to 1.10 or less. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A process cartridge comprising an electrophotographic photosensitive member having a photosensitive layer on a support, and at least one means selected from the group consisting of a charging means, a developing means, a transfer means and a cleaning means which are integrally supported;
- and being detachably mountable to the main body of an electrophotographic apparatus;
wherein;
a surface layer of said electrophotographic photosensitive member contains a high-molecular-weight charge-transporting material having a weight-average molecular weight Mw of from 1,000 or more to 9,000 or less; and
the ratio of the weight-average molecular weight Mw of the high-molecular-weight charge-transporting material to a number-average molecular weight Mn of the high-molecular-weight charge-transporting material, Mw/Mn, is from more than 1.00 to 1.10 or less.
- and being detachably mountable to the main body of an electrophotographic apparatus;
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11. An electrophotographic apparatus comprising an electrophotographic photosensitive member having a photosensitive layer on a support, a charging means, an exposure means, a developing means and a transfer means, wherein;
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a surface layer of said electrophotographic photosensitive member contains a high-molecular-weight charge-transporting material having a weight-average molecular weight Mw of from 1,000 or more to 9,000 or less; and
the ratio of the weight-average molecular weight Mw of the high-molecular-weight charge-transporting material to a number-average molecular weight Mn of the high-molecular-weight charge-transporting material, Mw/Mn, is from more than 1.00 to 1.10 or less.
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Specification