Electrophotographic Photoreceptor Outermost Layer Wear Resistance
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Solution Overview
Problem
Electrophotographic photoreceptors face challenges in achieving high wear resistance, non-filming properties, and cleanability while maintaining electrical properties, particularly when trying to enhance speed and durability, as existing solutions often compromise on one performance aspect for another.
Innovation Solution
Incorporating a charge transport substance with a specific structure and a compound into the outermost layer of the photoreceptor, along with a binder resin, to create a photosensitive layer that balances wear resistance, adhesion, and electrical responsiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the proportion of charge transport substance in the photosensitive layer is increased to enhance electrical responsiveness, then speed is improved, but wear resistance deteriorates
Solution Approach 1:
The patent modifies the chemical structure parameters of the charge transport substance by introducing a specific conjugated system structure with aromatic rings and double bonds. This structural parameter change enables the substance to achieve high charge mobility (improving electrical responsiveness) while simultaneously providing enhanced mechanical strength and wear resistance, resolving the contradiction between speed and durability.
Solution Approach 2:
The patent creates a composite photosensitive layer by combining the specially structured charge transport substance with a binder resin. This composite material approach allows the charge transport substance to provide electrical responsiveness while the binder resin contributes to mechanical strength and wear resistance, achieving both high speed and durability simultaneously.
2Strength
If a polyester resin is used as binder resin to improve durability, then wear resistance is improved, but electrical property deteriorates
Solution Approach 1:
The patent changes the chemical structure parameters of the charge transport substance to include an extended conjugated system with multiple aromatic rings. This structural modification compensates for the inferior electrical properties of polyester resin by enhancing the charge transport capability of the additive itself, allowing the use of durable polyester binder while maintaining high electrical responsiveness.
Solution Approach 2:
The specially structured charge transport substance acts as an intermediary that bridges the gap between the polyester binder resin and the required electrical performance. It mediates the electrical charge transport function that the polyester resin alone cannot provide, enabling the system to achieve both durability from the binder and electrical property from the charge transport substance.
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 provides an electrophotographic photoreceptor with improved wear resistance, non-filming properties, and cleanability, maintaining low residual potential and high-speed responsiveness, suitable for long-life applications without adverse effects on electrical properties.
Implementation Method 1
the outermost layer contains a charge transport substance represented by formula (1) and a compound represented by formula (5)
Data Source
AI summary
The present invention relates to an electrophotographic photoreceptor comprising a conductive support and at least a photosensitive layer provided thereon, wherein the electrophotographic photoreceptor comprises an outermost layer which contains a specific charge transport substance and a specific compound.