JP2014029501A5

JP2014029501A5 -

Info

Publication number: JP2014029501A5
Application number: JP2013130015A
Authority: JP
Filing date: 2013-06-20
Publication date: 2015-07-09
Anticipated expiration: 2033-06-20

Claims

A laminate, an electrophotographic photoreceptor having a hole transport layer formed on the laminate,
The laminate is a support, an electron transport layer having a film thickness of d1 (μm) formed on the support, and a charge generation layer having a film thickness of d2 (μm) formed on the electron transport layer. Have
An electrophotographic photoreceptor, wherein the laminate satisfies the following formulas (2) and (4).
| Vl2-Vl1 | ≦ 0.35 (2)
0.10 ≦ | (Vd2−Vl3) /Vd2|≦0.20 (4)
(In the formulas (2) and (4),
Vl1 is
Charging the surface of the charge generation layer such that the surface potential of the charge generation layer is Vd1 (V) represented by the following formula (1):
The charge generation in which the light whose intensity is set so that the surface potential of the charge generation layer is attenuated by 20% with respect to Vd1 (V) 0.20 seconds after exposure is charged with the surface potential of Vd1 (V) The layer is exposed and shows the surface potential 0.18 seconds after exposure.
Vd1 = −50 × (d1 + d2) (1)
Vl2 is
Charging the surface of the charge generation layer so that the surface potential of the charge generation layer is Vd1 (V) represented by the above formula (1);
The light is exposed to the charge generation layer charged with a surface potential of Vd1 (V), and the surface potential after 0.22 seconds from the exposure is shown.
Vl3 is
Charging the surface of the charge generation layer so that the surface potential of the charge generation layer is Vd2 (V) represented by the following formula (3):
The light is exposed to the charge generation layer charged with a surface potential of Vd2 (V), and the surface potential after 0.20 seconds from the exposure is shown.
Vd2 = −30 × (d1 + d2) (3)

The electrophotographic photosensitive member according to claim 1, wherein the electron transport layer has a film thickness d1 of 0.2 μm or more and 0.7 μm or less.

3. The electrophotographic photosensitive member according to claim 1, wherein in the formula (2), | Vl 2 −Vl 1 | satisfies the following formula (9).
| Vl2-Vl1 | ≦ 0.28 (9)

The electrophotographic photosensitive member according to any one of claims 1 to 3, wherein | (Vd2-Vl3) / Vd2 | in the formula (4) satisfies the following formula (10).
0.10 ≦ | (Vd2−Vl3) /Vd2|≦0.16 (10)

The electron transport layer contains a polymer obtained by polymerizing a composition comprising an electron transport material having a polymerizable functional group, a thermoplastic resin having a polymerizable functional group, and a crosslinking agent. The electrophotographic photosensitive member according to any one of the above.

The electrophotographic photosensitive member according to claim 5, wherein the crosslinking agent has 3 to 6 monovalent groups represented by an isocyanate group, a blocked isocyanate group, or —CH ₂ —OR ¹ (R ¹ represents an alkyl group). body.

The electrophotographic photosensitive member according to claim 5 or 6, wherein the content of the electron transport material having a polymerizable functional group is 30% by mass or more and 70% by mass or less with respect to the total mass of the composition.

The electrophotographic photoreceptor according to claim 1, wherein the charge generation layer contains at least one charge generation material selected from the group consisting of phthalocyanine pigments and azo pigments.

The electrophotographic photosensitive material according to claim 1, wherein the hole transport layer contains at least one charge transport material selected from the group consisting of a triarylamine compound, a benzidine compound, and a styryl compound. body.

An electrophotographic photosensitive member according to any one of claims 1 to 9, and at least one means selected from the group consisting of a charging means, a developing means, a transfer means, and a cleaning means, are integrally supported, and electrophotographic A process cartridge that is detachable from the main unit.

An electrophotographic apparatus comprising: the electrophotographic photosensitive member according to claim 1; a charging unit, an exposure unit, a developing unit, and a transfer unit.

An electrophotographic photosensitive member having a support, an electron transport layer formed on the support, a charge generation layer formed on the electron transport layer, and a hole transport layer formed on the charge generation layer. And
The electron transport layer contains a polymer obtained by polymerizing a composition with an electron transport material having a polymerizable functional group, a thermoplastic resin having a polymerizable functional group, and a crosslinking agent;
The crosslinking agent is an isocyanate group, a blocked isocyanate group, or -CH _２2 -OR ^１1 (R ^１1 Represents an alkyl group) and has 3 to 6 monovalent groups represented by
The electrophotographic photoreceptor, wherein the content of the electron transport material having a polymerizable functional group is 30% by mass or more and 70% by mass or less with respect to the total mass of the composition.