ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, METHOD FOR PRODUCING THE SAME, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS

• US 20160154329A1
• Filed: 11/23/2015
• Published: 06/02/2016
• Est. Priority Date: 11/28/2014
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Kawaguchi, Daisuke, Tanaka, Daisuke, Sugiyama, Kazumichi, Murakami, Takeshi
• Granted Patent: US 9,568,846 B2
• Time in Patent Office: Days
• CPC Class Codes: G03G 5/04 Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
• CPC Class Codes: G03G 5/144 comprising inorganic material

Abstract

An undercoat layer of an electrophotographic photosensitive member contains zinc oxide particles subjected to a surface treatment with an organometallic compound or an organosilicon compound and titanium oxide particles subjected to a surface treatment with an organometallic compound or an organosilicon compound. The titanium oxide particles have an average primary particle diameter of 100 nm or more and 600 nm or less. A volume ratio of the titanium oxide particles represented by formula (1) is 1.0 or more and 25 or less.

Claims

1. An electrophotographic photosensitive member comprising:

a support;

an undercoat layer on the support; and

a photosensitive layer on the undercoat layer,

wherein the undercoat layer contains zinc oxide particles subjected to a surface treatment with an organometallic compound or an organosilicon compound and titanium oxide particles subjected to a surface treatment with an organometallic compound or an organosilicon compound,

the titanium oxide particles have an average primary particle diameter of 100 nm or more and 600 nm or less, and

a volume ratio of the titanium oxide particles represented by formula (1) is 1.0 or more and 25 or less;

2. The electrophotographic photosensitive member according to claim 1, wherein the volume ratio of the titanium oxide particles represented by formula (1) is 5.0 or more and 20 or less.

3. The electrophotographic photosensitive member according to claim 1,

wherein the zinc oxide particles are zinc oxide particles subjected to a surface treatment with an organosilicon compound, and

the titanium oxide particles are titanium oxide particles subjected to a surface treatment with an organosilicon compound.

4. The electrophotographic photosensitive member according to claim 1, wherein the organosilicon compound has an amino group.

5. The electrophotographic photosensitive member according to claim 1, wherein the average primary particle diameter (R1) of the zinc oxide particles is 20 nm or more and 80 nm or less.

6. The electrophotographic photosensitive member according to claim 1, wherein the titanium oxide particles are coated with at least one of alumina and silica.

7. A method for producing an electrophotographic photosensitive member that includes a support, an undercoat layer on the support, and a photosensitive layer on the undercoat layer,

the undercoat layer containing zinc oxide particles subjected to a surface treatment with an organometallic compound or an organosilicon compound and titanium oxide particles subjected to a surface treatment with an organometallic compound or an organosilicon compound,

the titanium oxide particles having an average primary particle diameter of 100 nm or more and 600 nm or less, and

a volume ratio of the titanium oxide particles represented by formula (1) being 1.0 or more and 25 or less,

the method comprising the steps of:

preparing an undercoat layer-forming coating liquid containing the zinc oxide particles and the titanium oxide particles;

forming a coating film of the undercoat layer-forming coating liquid; and

forming an undercoat layer by drying the coating film;

8. A process cartridge detachably attachable to a main body of an electrophotographic apparatus, the process cartridge comprising:

an electrophotographic photosensitive member including a support, an undercoat layer on the support, and a photosensitive layer on the undercoat layer; and

at least one device selected from the group consisting of a charging device, a developing device, and a cleaning device,

the electrophotographic photosensitive member and the at least one device being integrally supported,

wherein the undercoat layer of the electrophotographic photosensitive member contains zinc oxide particles subjected to a surface treatment with an organometallic compound or an organosilicon compound and titanium oxide particles subjected to a surface treatment with an organometallic compound or an organosilicon compound,

the titanium oxide particles have an average primary particle diameter of 100 nm or more and 600 nm or less, and

a volume ratio of the titanium oxide particles represented by formula (1) is 1.0 or more and 25 or less;

9. An electrophotographic apparatus comprising:

an electrophotographic photosensitive member including a support, an undercoat layer on the support, and a photosensitive layer on the undercoat layer;

a charging device;

an exposure device;

a developing device; and

a transfer device,

wherein the undercoat layer of the electrophotographic photosensitive member contains zinc oxide particles subjected to a surface treatment with an organometallic compound or an organosilicon compound and titanium oxide particles subjected to a surface treatment with an organometallic compound or an organosilicon compound,

the titanium oxide particles have an average primary particle diameter of 100 nm or more and 600 nm or less, and

a volume ratio of the titanium oxide particles represented by formula (1) is 1.0 or more and 25 or less;

10. An electrophotographic photosensitive member comprising:

a support;

an undercoat layer on the support; and

a photosensitive layer on the undercoat layer,

wherein the undercoat layer contains zinc oxide particles subjected to a surface treatment with an organometallic compound or an organosilicon compound and titanium oxide particles,

the titanium oxide particles have an average primary particle diameter of 100 nm or more and 600 nm or less,

a volume ratio of the titanium oxide particles represented by formula (1) is 1.0 or more and 25 or less;

11. The electrophotographic photosensitive member according to claim 10, wherein the volume ratio of the titanium oxide particles represented by formula (1) is 5.0 or more and 20 or less.

12. The electrophotographic photosensitive member according to claim 10, wherein the titanium oxide particles are titanium oxide particles subjected to a surface treatment with an organometallic compound or an organosilicon compound.

13. The electrophotographic photosensitive member according to claim 10,

wherein the zinc oxide particles are zinc oxide particles subjected to a surface treatment with an organosilicon compound, and

the titanium oxide particles are titanium oxide particles subjected to a surface treatment with an organosilicon compound.

14. The electrophotographic photosensitive member according to claim 10, wherein the organosilicon compound has an amino group.

15. The electrophotographic photosensitive member according to claim 10, wherein the average primary particle diameter (R1) of the zinc oxide particles is 20 nm or more and 80 nm or less.