Imaging Member Outer Layer for Torque Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electrophotographic photoreceptors experience high torque and A-zone deletion issues in humid environments, leading to reduced service life and image quality, particularly with low-wear overcoat layers used in bias charge roller (BCR) charging systems.
Innovation Solution
A delivery member with an elastomeric matrix comprising functional materials is used to apply an ultra-thin layer onto the photoreceptor surface, acting as a lubricant and barrier against moisture and contaminants, reducing friction and wear, and extending the photoreceptor's life by continuous delivery of functional materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a very thin outer layer comprising functional materials is applied to the imaging member surface, then torque is reduced and image quality is improved, but the complexity of the imaging member structure increases
Solution Approach 1:
The functional materials are pre-applied to the imaging member surface during manufacturing to form a very thin outer layer (1-100 nm) that reduces torque and prevents A-zone deletion. This preliminary action eliminates the need for separate torque reduction treatments during operation, resolving the contradiction between achieving low torque and maintaining structural simplicity.
Solution Approach 2:
A very thin outer layer (1-100 nm) comprising functional materials is applied to the imaging member surface. This thin film structure provides lubrication and protection against moisture/contaminants while maintaining optical transparency and electrical properties, thereby reducing torque without significantly increasing structural complexity.
2Duration of action of stationary object
If a very thin outer layer is applied to protect against moisture and contaminants, then service life is extended, but manufacturing complexity increases
Solution Approach 1:
The protective outer layer is applied during the manufacturing process rather than as a separate post-processing step. This preliminary protection extends service life by preventing moisture and contaminant ingress from the outset, while integrating the protection function into existing manufacturing workflows to minimize added complexity.
Solution Approach 2:
A very thin outer layer (1-100 nm) is applied to the imaging member surface during manufacturing. This thin film provides effective barrier protection against moisture and contaminants, extending service life while requiring minimal additional manufacturing steps due to its nanoscale thickness.
3Duration of action of moving object
If functional materials are delivered continuously to the photoreceptor surface, then wear rate is reduced and service life is extended, but the complexity of the delivery system increases
Solution Approach 1:
The imaging member itself serves as the delivery system for functional materials. The very thin outer layer (1-100 nm) comprising functional materials is integrated directly into the imaging member structure, allowing continuous delivery of protective and lubricating properties during normal operation without requiring separate delivery mechanisms, thereby extending service life while maintaining system simplicity.
4Force
If an ultra-thin layer of functional material is applied as a lubricant, then friction is reduced and torque decreases, but manufacturing precision requirements increase
Solution Approach 1:
A very thin outer layer (1-100 nm) is applied to the imaging member surface to provide lubrication and reduce friction. The narrow thickness range (1-100 nm) ensures sufficient lubrication effect while maintaining optical transparency and electrical properties, with manufacturing precision managed through controlled application processes during production.
Solution Approach 2:
The thickness of the outer layer is optimized within the range of 1-100 nm to achieve the desired balance between friction reduction and manufacturing feasibility. This parameter optimization ensures that the layer is thin enough to provide effective lubrication and maintain optical/electrical properties, while being thick enough to be applied with reasonable manufacturing precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution significantly reduces torque, wear rate, and A-zone deletions, improving image quality and extending the service life of photoreceptors in high humidity conditions, while maintaining electrical properties and avoiding contamination.
Implementation Method 1
an outer layer that comprises functional materials that act as a lubricant and or a barrier against moisture and/or surface contaminants
Data Source
AI summary
The presently disclosed embodiments relate generally to an image forming apparatus comprising a delivery member in contact with either the surface of an imaging member or in contact with the surface of the bias charge roller, wherein the delivery member is fabricated as a polymer matrix impregnated with functional materials, such that the functional material is transferred onto the imaging member or bias charge roller from the delivery member. Embodiments also pertain to an improved electrophotographic imaging member comprising a very thin outer layer on the imaging member surface, where the outer layer comprises functional materials, such as paraffin, that act as a lubricant and/or a barrier against moisture and/or surface contaminants. The improved imaging member exhibits improved xerographic performance, such as reduced torque, reduced friction, and deletions in high humidity conditions.