# US 2008/0187858 A1 · Substrate for electrophotographic photoreceptor, process for producing the substrate, and electrophotographic photoreceptor employing the substrate

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- Number: US 2008/0187858 A1
- Document ID: US20080187858A1
- Status: Published application
- Kind: A1
- Application number: 12/024,141
- Filed: 2008-02-01
- Published: 2008-08-07
- Earliest claimed: 2003-03-04
- Assignees: Mitsubishi Chemical Corporation
- Inventors: Susumu TAGUCHI
- Web page: https://patentgrep.com/patent/US20080187858A1

## CPC

- G03G 5/10: Bases for charge-receiving or other layers
- Y10T 29/30: Foil or other thin sheet-metal making or treating
- Y10T 428/24355: Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

An electrophotographic photoreceptor substrate which can be easily produced with high productivity and prevents the occurrence of image defects, and which has fine grooves formed in the surface thereof and is characterized in that the grooves are curved and discontinuous when the substrate surface is developed on a plane.

## Claims

### Claim 1

A process for producing an electrophotographic photoreceptor substrate, which substrate has a groove pattern made by forming many fine grooves at least in almost the whole image formation region in the substrate surface, wherein the grooves are curved and discontinuous when the substrate surface is developed into a plane and the plane is viewed in a direction perpendicular thereto, which process comprises bringing at least one flexible material into contact with the surface of the substrate and causing the flexible material to relatively travel on the substrate surface.

### Claim 2 (depends on 1)

The process for producing an electrophotographic photoreceptor substrate according to claim 1, wherein the substrate surface is subjected to rough turning and finish turning beforehand.

### Claim 3 (depends on 1)

The process for producing an electrophotographic photoreceptor substrate of claim 1, wherein the substrate surface is subjected to finish turning beforehand.

### Claim 4 (depends on 1)

The process for producing an electrophotographic photoreceptor substrate according to claim 1, wherein the substrate is subjected to ironing beforehand.

### Claim 5 (depends on 1)

The process for producing an electrophotographic photoreceptor substrate according to claim 1, wherein the number of the flexible materials to be used is 2 or larger.

### Claim 6 (depends on 1)

The process for producing an electrophotographic photoreceptor substrate according to claim 1, wherein a brush is used as the flexible material.

### Claim 7 (depends on 1)

The process for producing an electrophotographic photoreceptor substrate according to claim 1, wherein a brush comprising a resin containing abrasive grains incorporated therein through kneading is used as the flexible material.

### Claim 8 (depends on 7)

The process for producing an electrophotographic photoreceptor substrate according to claim 7, wherein the abrasive grains have a maximum diameter of 50 μm or smaller.

### Claim 9 (depends on 1)

The process for producing an electrophotographic photoreceptor substrate according to claim 1, wherein the substrate is electrically conductive.

### Claim 10 (depends on 1)

The process for producing an electrophotographic photoreceptor substrate according to claim 1, wherein the groove pattern formed in the substrate surface is a lattice pattern.

### Claim 11 (depends on 1)

The process for producing an electrophotographic photoreceptor substrate according to claim 1, wherein the substrate surface has a maximum height/roughness Rz of 0.6 Rz≦2 μm and a kurtosis Rku of 3.9≦Rku≦30 and the grooves formed in the substrate surface have a width L of 0.5≦L≦6.0 μm.

### Claim 12 (depends on 1)

The process for producing an electrophotographic photoreceptor substrate according to claim 1, wherein the substrate is made of a metallic material or an insulating material which has undergone an electrical conductivity-imparting treatment.

### Claim 13 (depends on 1)

The process for producing an electrophotographic photoreceptor substrate according to claim 1, wherein the substrate is made of aluminum.

### Claim 14 (depends on 1)

The process for producing an electrophotographic photoreceptor substrate according to claim 1, wherein the substrate is an insulating material which has undergone an electrical conductivity-imparting treatment.