Crack resistant imaging member preparation and processing method
AssigneeXerox Corporation
InventorsRobert C. U. Yu, Stephen T. Avery, Michael S. Roetker
Life of this patent
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Abstract
The presently disclosed embodiments relate in general to electrophotographic imaging members, such as layered photoreceptor structures, and processes for making and using the same. More particularly, the embodiments pertain to the development of a structurally simplified flexible electrophotographic imaging member without the need of an anticurl back coating layer and a post treatment process for effecting the imaging member service life extension in the field.
Claims22
A method for making a flexible imaging member comprising:
- providing a flexible substrate;
- forming a charge generating layer over the substrate;
- forming at least one charge transport layer over the charge generating layer to form an imaging member web, wherein the at least one charge transport layer is formed from a solution comprising
- a polycarbonate, a charge transport compound of N,N′-diphenyl-N,N′-bis(3-methylphenyl)-1,1-biphenyl-4,4′-diamine, solvent and a liquid compound having a high boiling point, and further wherein the liquid compound is miscible with both the polycarbonate and N,N′-diphenyl-N,N′-bis(3-methylphenyl)-1,1-biphenyl-4,4′-diamine;
- positioning the imaging member web over a surface such that the substrate is disposed over the surface and the charge transport layer is exposed to a heat source;
- heating the charge transport layer to a temperature above a glass transition temperature of the charge transport layer to relieve internal strain and to remove residual solvent;
- and
- cooling the charge transport layer to ambient room temperature, such that the imaging member web is substantially curl-free.
A process for making a flexible imaging member comprising:
- providing a flexible substrate;
- forming a single imaging layer disposed over the substrate to form an imaging member web, wherein the single imaging layer disposed on the substrate has both charge generating and charge transporting capability and further wherein the single imaging layer is made from a solution comprising a polycarbonate, N,N′-diphenyl-N,N′-bis(3-methylphenyl)-1,1-biphenyl-4,4′-diamine, a pigment dispersion, a solvent and a liquid compound having a high boiling point and being miscible with both the polycarbonate and N,N′-diphenyl-N,N′-bis(3-methylphenyl)-1,1-biphenyl-4,4′-diamine;
- positioning the imaging member web over a surface such that the substrate is disposed over the surface and the single imaging layer is exposed;
- heating the single imaging layer to a temperature above a glass transition temperature of the single imaging layer to relieve internal strain and to remove residual solvent;
- and
- cooling the single imaging layer to ambient room temperature, such that the resulting imaging member web is substantially curl-free.
A system for making a flexible imaging member comprising:
- a treatment tube for disposing a web stock over, the web stock comprising a charge transport layer being made from a solution comprising a polycarbonate, N,N′-diphenyl-N,N′-bis(3-methylphenyl)-1,1-biphenyl-4,4′-diamine, a solvent, and a liquid compound having a high boiling point and being miscible with both the polycarbonate and N,N′-diphenyl-N,N′-bis(3-methylphenyl)-1,1-biphenyl-4,4′-diamine;
- a heat source for applying an infrared radiant beam to the surface of the disposed web stock to eliminate internal strain and remove residual solvent;
- and
- a roller for winding the web stock into a take-up roll.
Dependencies are inferred from the claim text.