Photoconductor, image forming apparatus, and process cartridge

Patent metadata

Field	Value
Publication number	US-10209639-B2
Application number	US-201715484715-A
Country	US
Kind code	B2
Filing date	Apr 11, 2017
Priority date	Apr 25, 2016
Publication date	Feb 19, 2019
Grant date	Feb 19, 2019

Abstract

A photoconductor including a conductive support, an undercoat layer, a charge-generating layer, and a charge-transporting layer, at least the undercoat layer, the charge-generating layer, and the charge-transporting layer being disposed on the conductive support in an order mentioned, wherein the undercoat layer includes a binder resin and metal oxide particles, and the charge-generating layer includes a binder resin, a titanyl phthalocyanine pigment, and a salicylic acid derivative.

First claim

What is claimed is:

1. A photoconductor comprising:
a conductive support;
an undercoat layer;
a charge-generating layer; and
a charge-transporting layer,
wherein at least the undercoat layer, the charge-generating layer, and the charge-transporting layer are disposed on the conductive support in that order,
wherein the undercoat layer comprises a binder resin, and metal oxide particles, and a salicylic acid derivative,
wherein metal oxide particles comprise at least one oxide selected from the group consisting of titanium oxide, zinc oxide, tin oxide, and zirconium oxide,
wherein the charge-generating layer comprises a binder resin, a titanyl phthalocyanine pigment, and a salicylic acid derivative, wherein the salicylic acid derivative comprised in the charge-generating layer is at least one selected from the group consisting of 3,5-di-t-butylsalicylic acid, 3-aminosalicylic acid, and 3,5-dinitrosalicylic acid, and
wherein the salicylic acid derivative comprised in the undercoat layer is at least one selected from the group consisting of 3,5-di-t-butylsalicylic acid, 3-aminosalicylic acid, and 3,5-dinitrosalicylic acid, wherein an amount of the salicylic acid derivative in the undercoat layer is from 1 part by mass to 3 parts by mass, based on 100 parts by mass of metal oxide particles.

2. The photoconductor according to claim 1 , wherein the metal oxide particles are zinc oxide particles.

3. An image forming apparatus comprising:
a photoconductor;
a charging unit configured to charge a surface of the photoconductor;
an exposing unit configured to expose the surface charged of the photoconductor to light to form an electrostatic latent image;
a developing unit configured to develop the electrostatic latent image with a toner to form a visible image; and
a transferring unit configured to transfer the visible image onto a recording medium,
wherein the photoconductor is the photoconductor according to claim 1 .

4. A process cartridge comprising:
a photoconductor; and
at least one selected from the group consisting of:
a charging unit configured to charge a surface of the photoconductor;
an exposing unit configured to expose the surface charged of the photoconductor to light to form an electrostatic latent image;
a developing unit configured to develop the electrostatic latent image with a toner to form a visible image; and
a transferring unit configured to transfer the visible image onto a recording medium,

wherein the photoconductor is the photoconductor according to claim 1 .

Assignees

• Asano Tomoharu
• Suzuki Tetsuro
• Kurimoto Eiji
• Nii Daisuke
• Ishida Toshihiro
• Ricoh Co Ltd

Inventors

• Asano Tomoharu
• Suzuki Tetsuro
• Kurimoto Eiji
• Nii Daisuke
• Ishida Toshihiro

Classifications

• G03G5/0696

  Phthalocyanines · CPC title

• G03G5/047

  characterised by the charge-generation layers or charge transport layers {(G03G5/0433 and G03G5/0436 take precedence)} · CPC title

• G03G5/0517

  comprising one or more cyclic groups consisting of carbon-atoms only · CPC title

• G03G5/0612

  containing nitrogen · CPC title

• G03G5/144 Primary

  comprising inorganic material · CPC title