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US 7,399,563 B2Granted
Electrophotographic photoconductor, and image forming process, image forming apparatus and process cartridge for an image forming apparatus using the same
AssigneeRicoh Company, Ltd.
InventorsTetsuro Suzuki, Hiroshi Tamura, Hiroshi Ikuno, Kazukiyo Nagai, Hongguo Ll
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Abstract
Disclosed is an electrophotographic photoconductor including at least a photoconductive layer on an electroconductive substrate, which comprises at least a cross-linked surface layer formed by curing a tri- or more-functional radical polymerizable monomer without having a charge transporting structure and a mono-functional radical polymerizable compound having a charge transporting structure wherein the cross-linked surface layer has a surface roughness Rz of 1.3 μm or less.
Claims19
An electrophotographic photoconductor, comprising:
- an electroconductive substrate;
- and
- a photoconductive layer on or above the electroconductive substrate, the photoconductive layer comprising:
- a cross-linked surface layer which comprises:
- a cured tri- or more-functional radical polymerizable monomer without having a charge transporting structure;
- and
- a cured mono-functional radical polymerizable compound having a charge transporting structure,
- wherein the cross-linked surface layer has a surface roughness Rz of 1.3 μm or less;
- and
- the cured tri- or more-functional radical polymerizable monomer without having a charge transporting structure has a functional group selected from the group consisting of an acryloyloxy group and a methacryloyloxy group.
7 more elements
A process for forming an image, comprising:
- charging an electrophotographic photoconductor;
- exposing the electrophotographic photoconductor which is charged to a recording light so as to form an electrostatic latent image;
- developing the electrostatic latent image by a developing agent so as to visualize the electrostatic latent image and form a toner image;
- and
- transferring the toner image formed by developing onto a transfer material,
- wherein the electrophotographic photoconductor comprises:
- an electroconductive substrate;
- a photoconductive layer on or above the electroconductive substrate, the photoconductive layer comprising:
- a cross-linked surface layer which comprises:
- a cured tri- or more-functional radical polymerizable monomer without having a charge transporting structure;
- and
- a cured mono-functional radical polymerizable compound having a charge transporting structure,
- wherein the cross-linked surface layer has a surface roughness Rz of 1.3 μm or less;
- and
- the cured tri- or more-functional radical polymerizable monomer without having a charge transporting structure has a functional group selected from the group consisting of an acryloyloxy group and a methacryloyloxy group.
12 more elements
An apparatus for forming an image, comprising:
- an electrophotographic photoconductor;
- a charger to charge the electrophotographic photoconductor;
- an exposer to expose the electrophotographic photoconductor charged by the charger to a recording light to form an electrostatic latent image;
- a developing unit to supply a developing agent to the electrostatic latent image to visualize the electrostatic latent image and form a toner image;
- and
- a transferring unit to transfer the toner image formed by the developing unit on a transfer material,
- wherein the electrophotographic photoconductor comprises:
- an electroconductive substrate;
- a photoconductive layer on or above the electroconductive substrate, the photoconductive layer comprising:
- a cross-linked surface layer which comprises:
- a cured tri- or more-functional radical polymerizable monomer without having a charge transporting structure;
- and
- a cured mono-functional radical polymerizable compound having a charge transporting structure,
- wherein the cross-linked surface layer has a surface roughness Rz of 1.3 μm or less;
- and
- the cured tri- or more-functional radical polymerizable monomer without having a charge transporting structure has a functional group selected from the group consisting of an acryloyloxy group and a methacryloyloxy group.
13 more elements
A process cartridge for an image forming apparatus, comprising:
- an electrophotographic photoconductor;
- and
- at least one selected from the group consisting of:
- a charger to charge the electrophotographic photoconductor;
- a developing unit to supply a developing agent to an electrostatic latent image formed by exposure on the electrophotographic photoconductor to visualize the electrostatic latent image and form a toner image;
- a transferring unit to transfer the toner image formed by the developing unit on a transfer material;
- a cleaning unit to remove toner remaining on the electrophotographic photoconductor after transferring;
- and
- a discharging unit to remove the latent image on the photoconductor after transferring so as to form a monolithic structure,
- wherein the process cartridge is adapted to be attached to and detached from a main body of the image forming apparatus, and
- the electrophotographic photoconductor comprises:
- an electroconductive substrate;
- a photoconductive layer on or above the electroconductive substrate, the photoconductive layer comprising:
- a cross-linked surface layer which comprises:
- a cured tri- or more-functional radical polymerizable monomer without having a charge transporting structure;
- and
- a cured mono-functional radical polymerizable compound having a charge transporting structure,
- wherein the cross-linked surface layer has a surface roughness Rz of 1.3 μm or less;
- and
- the cured tri- or more-functional radical polymerizable monomer without having a charge transporting structure has a functional group selected from the group consisting of an acryloyloxy group and a methacryloyloxy group.
17 more elements
Dependencies are inferred from the claim text.