JP2012018405A5

JP2012018405A5 -

Info

Publication number: JP2012018405A5
Application number: JP2011174926A
Authority: JP
Filing date: 2011-08-10
Publication date: 2012-11-01
Anticipated expiration: 2030-09-02

Description

本発明は、
円筒状支持体と、
該円筒状支持体上に形成された、結着材料および金属酸化物粒子を含有し、かつアンチモンを含有しない導電層と、
該導電層上に形成された感光層と、
を有する電子写真感光体において、
該金属酸化物粒子が、リンがドープされている酸化スズで被覆されている酸化チタン粒子であり、
直流電圧のみの電圧−１．０ｋＶを該導電層に１時間連続印加する試験を行った場合、該試験の前後の該導電層の体積抵抗率が、下記数式（１）および（２）を満足することを特徴とする電子写真感光体である。
−０．５０≦（ｌｏｇ｜ρ_２｜−ｌｏｇ｜ρ_１｜）≦０．５０・・・（１）
１．０×１０^８≦ρ_１≦２．０×１０^１３・・・（２）
（式（１）および（２）中、ρ_１は、該試験の前に測定された該導電層の体積抵抗率［Ω・ｃｍ］であり、ρ_２は、該試験の後に測定された該導電層の体積抵抗率［Ω・ｃｍ］である。） The present invention
A cylindrical support;
A conductive layer formed on the cylindrical support, containing a binding material and metal oxide particles, and containing no antimony;
A photosensitive layer formed on the conductive layer;
In an electrophotographic photoreceptor having
The metal oxide particles are titanium oxide particles coated with tin oxide doped with phosphorus;
When a test in which a voltage of only DC voltage -1.0 kV was continuously applied to the conductive layer for 1 hour was performed, the volume resistivity of the conductive layer before and after the test satisfied the following formulas (1) and (2) An electrophotographic photosensitive member characterized in that:
− 0 . 5 0 ≦ (log | ρ ₂ | −log | ρ ₁ |) ≦ 0 . 5 0 (1)
1.0 × 10 ⁸ ≦ ρ ₁ ≦ 2.0 × 10 ¹³ (2)
(In the formulas (1) and (2), ρ ₁ is the volume resistivity [Ω · cm] of the conductive layer measured before the test, and ρ ₂ is the value measured after the test. (The volume resistivity of the conductive layer is [Ω · cm].)

以下に、具体的な実施例を挙げて本発明をさらに詳細に説明する。ただし、本発明はこれらに限定されるものではない。なお、実施例中の「部」は「質量部」を意味する。実施例１〜３、９〜１２、１４、１５および１７〜３６は参考例である。 Hereinafter, the present invention will be described in more detail with reference to specific examples. However, the present invention is not limited to these. In the examples, “part” means “part by mass”. Examples 1-3, 9-12, 14, 15, and 17-36 are reference examples.

Claims

A cylindrical support;
A conductive layer formed on the cylindrical support, containing a binding material and metal oxide particles, and containing no antimony;
A photosensitive layer formed on the conductive layer;
In an electrophotographic photoreceptor having
The metal oxide particles are titanium oxide particles coated with tin oxide doped with phosphorus;
When a test in which a voltage of only DC voltage -1.0 kV was continuously applied to the conductive layer for 1 hour was performed, the volume resistivity of the conductive layer before and after the test satisfied the following formulas (1) and (2) An electrophotographic photosensitive member characterized by comprising:
− 0 . 5 0 ≦ (log | ρ ₂ | −log | ρ ₁ |) ≦ 0 . 5 0 (1)
1.0 × 10 ⁸ ≦ ρ ₁ ≦ 2.0 × 10 ¹³ (2)
(In the formulas (1) and (2), ρ ₁ is the volume resistivity [Ω · cm] of the conductive layer measured before the test, and ρ ₂ is the value measured after the test. The volume resistivity [Ω · cm] of the conductive layer.)

Wherein the conductive layer, according to claim 1 powder resistivity is a layer formed by using the titanium oxide particles re down is coated with tin oxide doped in the range of 100~400Ω · cm Electrophotographic photoreceptor.

The conductive layer is a layer formed using titanium oxide particles coated with tin oxide doped with phosphorus having an average primary particle size in the range of 0.050 to 0.220 μm. The electrophotographic photosensitive member described.

The conductive layer is coated with tin oxide doped with phosphorus having a powder resistivity in the range of 100 to 400 Ω · cm and an average primary particle size in the range of 0.050 to 0.220 μm. The electrophotographic photosensitive member according to claim 1, wherein the electrophotographic photosensitive member is a layer formed using titanium oxide particles.

An electrophotographic photosensitive member according to any one of claims 1 to 4, 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 which is detachable from the apparatus main body.

An electrophotographic apparatus comprising the electrophotographic photosensitive member according to claim 1, and a charging unit, an exposing unit, a developing unit, and a transferring unit.