IMAGE BEARING MEMBER AND IMAGE FORMING APPARATUS

• US 20140030644A1
• Filed: 07/15/2013
• Published: 01/30/2014
• Est. Priority Date: 07/27/2012
• Status: Abandoned Application

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: HASEGAWA, Kunio, NAKAI, Hiroshi, SEKINE, Takuya, KOMITO, Kenji
• Application Number:
  US13/941,712
• Publication Number:
  US 20140030644A1
• Time in Patent Office: Days
• US Class Current: 430/56
• CPC Class Codes: G03G 21/0094 fatigue treatment of the photoconductor
• CPC Class Codes: G03G 5/05 Organic bonding materials; Methods for coating a substrate with a photoconductive layer; Inert supplements for use in photoconductive layers
• CPC Class Codes: G03G 5/0532 obtained by reactions only involving carbon-to-carbon unsatured bonds
• CPC Class Codes: G03G 5/0546 Polymers comprising at least one carboxyl radical, e.g. polyacrylic acid, polycrotonic acid, polymaleic acid; Derivatives thereof, e.g. their esters, salts, anhydrides, nitriles, amides
• CPC Class Codes: G03G 5/0592 Macromolecular compounds characterised by their structure or by their chemical properties, e.g. block polymers, reticulated polymers, molecular weight, acidity
• CPC Class Codes: G03G 5/075 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds G03G5/078 takes precedence
• CPC Class Codes: G03G 5/14717 obtained by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: G03G 5/14769 Other polycondensates comprising nitrogen atoms with or without oxygen atoms in the main chain
• CPC Class Codes: G03G 5/14791 Macromolecular compounds characterised by their structure, e.g. block polymers, reticulated polymers, or by their chemical properties, e.g. by molecular weight or acidity

Abstract

An image bearing member includes a substrate, a photosensitive layer overlying the substrate; and a surface layer overlying the photosensitive layer, wherein the surface layer includes a cross-linked layer formed by curing a radical polymerizable monomer having no charge transport structure and a radical polymerizable compound having a charge transport structure, wherein a protective agent is supplied to the surface layer by a protective agent supplying member which is arranged facing the surface layer and includes a roller having a core material and a foam layer thereon to form a protective layer on the surface layer.

Claims

1. An image bearing member comprising:

a substrate; and

a photosensitive layer overlying the substrate; and

a surface layer overlying photosensitive layer,

wherein the surface layer comprises a cross-linked layer formed by curing a radical polymerizable monomer having no charge transport structure and a radical polymerizable compound having a charge transport structure,

wherein a protective agent is supplied to the surface layer by a protective agent supplying member which is arranged facing the surface layer and comprises a roller having a core material and a foam layer thereon to form a protective layer on the surface layer.

2. An image forming apparatus comprising:

an image bearing member to bear a toner image, which has a surface layer comprising a cross-linked layer formed by curing a radical polymerizable monomer having no charge transport structure and a radical polymerizable compound having a charge transport structure; and

a protective agent supplying member to apply or attach a protective agent to the surface layer of the image bearing member, which comprises a roller having a core material and a foam layer thereon.

3. The image forming apparatus according to claim 2, wherein the foam layer comprises a urethane foam.

4. The image forming apparatus according to claim 2, wherein the foam layer is an interconnected cell type.

5. The image forming apparatus according to claim 2, wherein the radical polymerizable monomer having no charge transport structure has three or more functional groups and the radical polymerizable compound having a charge transport structure has a single functional group.

6. The image forming apparatus according to claim 5, wherein, a ratio of a molecular weight to a number of functional group in the radical polymerizable monomer having no charge transport structure is 250 or less.

7. The image forming apparatus according to claim 5, wherein the three or more functional groups of the radical polymerizable monomer having no charge transport structure are acryloyloxy groups and/or methcryloyloxy groups.

8. The image forming apparatus according to claim 5, wherein the single functional group of the radical polymerizable compound having a charge transport structure is an acryloyloxy group or a methcryloyloxy group.

9. The image forming apparatus according to claim 5, wherein the charge transport structure of the radical polymerizable compound having a charge transport structure is a triaryl amine structure.

10. The image forming apparatus according to claim 5, wherein the radical polymerizable compound having a charge transport structure is at least one compound represented by Chemical structure 1 or Chemical structure 2:

11. The image forming apparatus according to claim 4, wherein the radical polymerizable compound having a charge transport structure is at least one compound represented by Chemical structure 3: