METHOD FOR PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER

• US 20120225381A1
• Filed: 03/01/2012
• Published: 09/06/2012
• Est. Priority Date: 03/03/2011
• Status: Active Grant

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Nakamura, Nobuhiro, Matsuoka, Hideaki, Fujii, Atsushi, Tsuji, Haruyuki, Shida, Kazuhisa
• Granted Patent: US 8,455,170 B2
• Time in Patent Office: Days
• US Class Current: 430/131
• CPC Class Codes: G03G 5/104 comprising inorganic material other than metals, e.g. salts, oxides, carbon
• CPC Class Codes: G03G 5/144 comprising inorganic material

Abstract

An electrophotographic photosensitive member is provided in which black spots on an output image are hardly caused by local charge injection from a support to a photosensitive layer. For this purpose, a conductive layer is formed using a coating liquid for a conductive layer prepared using a solvent, a binder material and a metal oxide particle that satisfies the following relation (i): 45≦A×ρ×D≦65 (i) wherein A denotes the surface area of the metal oxide particle per unit mass [m²/g], D denotes the number average particle diameter of the metal oxide particle [μm], and ρ denotes the density of the metal oxide particle [g/cm³]. The metal oxide particle is a titanium oxide particle coated with tin oxide doped with phosphorus.

Claims

1. A method for producing an electrophotographic photosensitive member, comprising:

a step of forming a conductive layer having a volume resistivity of not less than 1.0×

10⁸Ω

·

cm but not more than 5.0×

10¹²Ω

·

cm on a support; and

a step of forming a photosensitive layer on the conductive layer, wherein

the step of forming the conductive layer comprises;

(i) preparing a coating liquid for a conductive layer using a solvent, a binder material, and a metal oxide particle that satisfies the following relation (i);

45≦

A×

ρ

×

D≦

65 

 

(i)

wherein A denotes a surface area of the metal oxide particle per unit mass [m²/g], D denotes a number average particle diameter of the metal oxide particle [μ

m], and ρ

denotes a density of the metal oxide particle [g/cm³]; and

(ii) forming the conductive layer using the coating liquid for a conductive layer, and

the metal oxide particle is a titanium oxide particle coated with tin oxide doped with phosphorus.

2. The method for producing an electrophotographic photosensitive member according to claim 1, wherein the metal oxide particle satisfies 0.13≦

D≦

0.25.

3. The method for producing an electrophotographic photosensitive member according to claim 1, wherein the metal oxide particle satisfies 45≦

A×

ρ

×

D≦

55.