Intermediate Transfer Member with Self-Release Additives
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Solution Overview
Problem
Existing intermediate transfer members in xerographic systems face issues such as brittleness, incomplete toner transfer, charge exchange leading to image deterioration, and the need for separate release layers, which increase costs and complexity, while also requiring external release assistance.
Innovation Solution
An intermediate transfer member comprising a thermosetting polyimide, a conductive component, and a carboxylic acid functionalized fluoro component that chemically reacts to form a polymeric network, enabling self-release from metal substrates without external assistance, thus eliminating the need for separate release layers and enhancing mechanical and electrical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a separate release layer is deposited on a metal substrate, then the intermediate transfer member components can be separated by peeling or mechanical devices, but the cost and time of preparation increase and the release layer modifies the intermediate transfer member characteristics
Solution Approach 1:
The patent combines the release functionality directly into the intermediate transfer member coating by incorporating release additives (such as fluorinated compounds or siloxanes) into the polyimide coating composition. This eliminates the need for a separate release layer, reducing the number of layers from two (release layer + intermediate transfer member) to one integrated structure, thereby reducing complexity while maintaining ease of separation.
Solution Approach 2:
The patent uses chemical intermediaries (release additives) incorporated into the coating that facilitate separation between the intermediate transfer member and the metal substrate. These additives act as mediators that enable controlled release without requiring external peeling mechanisms or separate release layers, thus simplifying the overall structure while maintaining operational ease.
2Ease of operation
If liquid fluoro agent is used in intermediate transfer member, then release properties are improved, but the polyimide phase separates making release control difficult
Solution Approach 1:
The patent creates a composite coating material by chemically incorporating release additives (such as perfluorocarboxylic acids or siloxane compounds) into the polyimide matrix during the coating formation process. This results in a homogeneous composite material where the release properties are uniformly distributed throughout the coating, preventing phase separation while maintaining controlled release capability.
Solution Approach 2:
The patent modifies the chemical parameters of the polyimide coating by incorporating release additives with specific chemical structures (such as fluorinated groups or siloxane groups) that change the surface energy and release characteristics of the coating. This allows control of release properties through chemical composition adjustments rather than using separate liquid fluoro agents that cause phase separation.
3Adaptability or versatility
If intermediate transfer member is used in color systems with synchronous development, then multiple toner transfers are achieved, but charge exchange between toner particles and transfer member causes incomplete transfer and image deterioration
Solution Approach 1:
The patent adjusts the electrical parameters of the intermediate transfer member by incorporating conductive additives (such as carbon black or metal particles) into the polyimide coating. This modifies the surface resistivity and charge distribution characteristics, reducing charge exchange between toner particles and the transfer member during synchronous color development, thereby improving toner transfer completeness and image quality.
Solution Approach 2:
The patent creates a composite coating structure combining polyimide with conductive and release additives. This multi-functional composite material simultaneously provides mechanical strength, controlled release properties, and optimized electrical characteristics for reliable toner transfer in color systems, eliminating the need for separate functional layers.
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 achieves high efficiency in toner transfer with minimal image resolution issues, improved stability, and reduced production costs by allowing self-release from metal substrates, resulting in high-quality images with excellent mechanical and electrical properties.
Implementation Method 1
the carboxylic acid functionalized fluoro component chemically reacts with the polyimide to form a polymeric network of the polyimide, and the carboxylic acid functionalized fluoro component
Data Source
AI summary
An intermediate transfer member that includes a polyimide, a conductive component, and a carboxylic acid functionalized fluoro component.