Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus

• US 10,203,617 B2
• Filed: 02/13/2018
• Issued: 02/12/2019
• Est. Priority Date: 02/28/2017
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Kuno, Jumpei, Anezaki, Takashi, Sato, Taichi, Kaku, Kenichi, Fujii, Atsushi
• Primary Examiner(s): Chea, Thorl
• Application Number:
  US15/895,148
• Publication Number:
  US 20180246425A1
• Time in Patent Office: 364 Days
• CPC Class Codes: G03G 2215/00957 Compositions
• CPC Class Codes: G03G 5/04 Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
• CPC Class Codes: G03G 5/0696 Phthalocyanines
• CPC Class Codes: G03G 5/144 comprising inorganic material

Abstract

Provided is an electrophotographic photosensitive member which can simultaneously achieve less occurrence of leakage and the definition of an output image even when being an electrophotographic photosensitive member where a layer containing a metal oxide particle is adopted as an electroconductive layer, and which includes a support, an electroconductive layer and a photosensitive layer in this order, wherein the electroconductive layer contains a binder material and a particle represented by general formula (1):
TiO_2.00−XN_Y  (1)
wherein Ti represents a titanium atom, O represents an oxygen atom, N represents a nitrogen atom and 0.00<Y<X≤0.60 is satisfied.

Claims

1. An electrophotographic photosensitive member comprising a support, an electroconductive layer and a photosensitive layer in this order, wherein the electroconductive layer comprises a binder material and a particle represented by general formula (1):

TiO<sub>2.00−

X</sub>N_Y 

 

(1)

wherein Ti represents a titanium atom, O represents an oxygen atom, N represents a nitrogen atom and 0.00<

Y<

X≤

0.60 is satisfied.

2. The electrophotographic photosensitive member according to claim 1, wherein the particle has a peak at a Bragg angle 2θ

±

0.1°

of 43.1 to 43.2°

in CuKα

characteristic X-ray diffraction.

3. The electrophotographic photosensitive member according to claim 1, wherein 0.05Y<

X≤

0.30 is satisfied in the general formula (1).

4. The electrophotographic photosensitive member according to claim 1, wherein an average primary particle size of the particle is 50 nm or more and 350 nm or less.

5. The electrophotographic photosensitive member according to claim 1, wherein a volume resistivity of the electroconductive layer is 1.0×

10⁵ Ω

·

cm or more and 5.0×

10¹² Ω

·

cm or less.

6. The electrophotographic photosensitive member according to claim 1, wherein a content of the particle is 20% by volume or more and 50% by volume or less based on a total volume of the electroconductive layer.

7. The electrophotographic photosensitive member according to claim 1, wherein a powder resistivity of the particle is 2.0×

10¹ Ω

·

cm or more.

8. A process cartridge that integrally supports an electrophotographic photosensitive member comprising a support, an electroconductive layer and a photosensitive layer in this order, and at least one unit selected from a charging unit, a developing unit, a transfer unit and a cleaning unit, and that is detachably mountable on a main body of an electrophotographic apparatus,

wherein the electroconductive layer comprises a binder material and a particle represented by general formula (1):

TiO<sub>2.00−

X</sub>N_Y 

 

(1)

wherein Ti represents a titanium atom, O represents an oxygen atom, N represents a nitrogen atom and 0.00<

Y<

X≤

0.60 is satisfied.

9. An electrophotographic apparatus comprising:

an electrophotographic photosensitive member comprising a support, an electroconductive layer and a photosensitive layer in this order; and

a charging unit, an exposure unit, a developing unit and a transfer unit,

wherein the electroconductive layer comprises a binder material and a particle represented by general formula (1);

TiO<sub>2.00−

X</sub>N_Y 

 

(1)

wherein Ti represents a titanium atom, O represents an oxygen atom, N represents a nitrogen atom and 0.00<

Y<

X≤

0.60 is satisfied.