Electrophotography photosensitive body

• US 6,535,710 B2
• Filed: 05/24/2001
• Issued: 03/18/2003
• Est. Priority Date: 05/25/2000
• Status: Expired due to Term

• Current Assignee: Fuji Electric Company Limited (Fuji Electric Systems Company Limited)
• Original Assignee: Fuji Electric Imaging Device Co., Ltd. (Fuji Electric Systems Company Limited)
• Inventors: Kawakami, Haruo, Takeshima, Motohiro
• Primary Examiner(s): GOODROW, JOHN L
• Application Number:
  US09/864,895
• Publication Number:
  US 20020018948A1
• Time in Patent Office: 663 Days
• Field of Search: 430/58.2, 430/96, 430/58.05, 399/147, 399/159, 399/279
• US Class Current: 399/279
• CPC Class Codes: G03G 5/047 characterised by the charge-generation layers or charge transport layers G03G5/0433 and G03G5/0436 take precedence
• CPC Class Codes: G03G 5/0578 Polycondensates comprising silicon atoms in the main chain

Abstract

A function separated laminated electrophotography photosensitive body is equipped with at least a charge generating layer and a charge transport layer on top of a conductive substrate. A contact angle θ of pure water on the charge transport layer satisfies the equation θ>=94°. The resulting organic electrophotography photosensitive body prevents contamination of the photosensitive body surface resulting from component migration from the developing roller and achieves a stable image quality.

Claims

1. A printer comprising:

an electrophotography photosensitive body, the electrophotography photosensative body comprising;

a conductive substrate;

a charge generating layer and a charge transport layer on top of said conductive substrate; and

a contact angle, Θ

, of pure water on said charge transport layer that satisfies the equation Θ

>

=94°

; and

a non-magnetic single component developing system, the non-magnetic single component developing system comprising a developing roller, the developing roller comprising a dielectric rubber material.

2. An electrophotography photosensitive body as described in claim 1, wherein:

said charge transport layer contains at least one of a resin binder of a polydialkyl siloxane-containing polycarbonate having a repeating unit represented by a following general formula (1)

wherein each R is independently a C₁-C₆ alkyl group or an optionally substituted C₆-C₁₂ aromatic hydrocarbon group;

B is (CH₂)_x;

x is an integer from 2-6;

n is from 0-200;

m from 1-50,

and another polycarbonate such that, with a weight M of said polydialkyl siloxane-containing polycarbonate and a weight N of said other polycarbonate has a ratio M/N which is greater than 1/4.

3. An electrophotography photosensitive body as described in claim 2, wherein:

said polydialkyl siloxane-containing polycarbonate has a repeating unit represented by a following formula (2),

wherein, for x, y and z, a ratio of x/(x+y+z) is 0.5-0.95, and a ratio of z/(x+y+z) is 0.0001-0.1;

n=0-200.