ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS

• US 20200133150A1
• Filed: 10/22/2019
• Published: 04/30/2020
• Est. Priority Date: 10/25/2018
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Mitsuda, Haruhiko, Ikezue, Tatsuya, Takizawa, Kumiko, Tanabe, Kan, Kuroiwa, Ikuyo, Ueno, Takanori, Shimada, Tsuyoshi
• Granted Patent: US 10,908,521 B2
• Time in Patent Office: Days
• CPC Class Codes: G03G 15/75 Details relating to xerographic drum, band or plate, e.g. replacing, testing electrographic recording members per se G03G5/00
• CPC Class Codes: G03G 21/1814 Details of parts of process cartridge, e.g. for charging, transfer, cleaning, developing G03G21/1835 takes precedence
• CPC Class Codes: G03G 5/0564 Polycarbonates
• CPC Class Codes: G03G 5/0605 Carbocyclic compounds
• CPC Class Codes: G03G 5/0618 containing oxygen and nitrogen
• CPC Class Codes: G03G 5/142 Inert intermediate layers
• CPC Class Codes: G03G 5/144 comprising inorganic material

Abstract

An electrophotographic photoconductor includes, in sequence, a support member; an undercoating layer containing a binder resin and an inorganic particle; and a photosensitive layer, wherein the binder resin of the undercoating layer is an alkyd-melamine resin, and the inorganic particle of the undercoating layer contains a strontium titanate particle.

Claims

1. An electrophotographic photoconductor comprising, in sequence:

a support member;

an undercoating layer containing a binder resin and an inorganic particle; and

a photosensitive layer,

wherein the binder resin of the undercoating layer is an alkyd-melamine resin, and

the inorganic particle of the undercoating layer contains a strontium titanate particle.

2. The electrophotographic photoconductor according to claim 1, wherein, in the undercoating layer, a mass ratio of an amount of the strontium titanate particle to a total amount of the inorganic particle is 0.8 or more and 1.0 or less.

3. The electrophotographic photoconductor according to claim 1, wherein, in the undercoating layer, a mass content ratio of the inorganic particle to the alkyd-melamine resin is 2.0 or more and 6.0 or less.

4. The electrophotographic photoconductor according to claim 1, wherein, in the alkyd-melamine resin of the undercoating layer, a mass ratio of an amount of a melamine resin to a total amount of an alkyd resin is 0.5 or more and 1.2 or less.

5. The electrophotographic photoconductor according to claim 1, wherein, in the undercoating layer, the strontium titanate particle has an average primary particle diameter of 10 nm or more and 100 nm or less.

6. The electrophotographic photoconductor according to claim 1, wherein the photosensitive layer contains a compound represented by formula (1),

7. A process cartridge supporting collectively an electrophotographic photoconductor and at least one unit selected from the group consisting of a charging unit, a developing unit, a transfer unit, a discharging unit, and a cleaning unit, and being configured to be detachably attached to a main body of an electrophotographic apparatus,

wherein the electrophotographic photoconductor includes, in sequence:

a support member;

an undercoating layer containing a binder resin and an inorganic particle; and

a photosensitive layer,

the binder resin of the undercoating layer is an alkyd-melamine resin, and

the inorganic particle of the undercoating layer contains a strontium titanate particle.

8. An electrophotographic apparatus comprising:

an electrophotographic photoconductor;

a charging unit;

an exposure unit;

a developing unit; and

a transfer unit,

wherein the electrophotographic photoconductor includes, in sequence;

a support member;

an undercoating layer containing a binder resin and an inorganic particle; and

a photosensitive layer,

the binder resin of the undercoating layer is an alkyd-melamine resin, and

the inorganic particle of the undercoating layer contains a strontium titanate particle.