Photosensitive Member Surface Layer for Humidity-Stable Cleanability
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Solution Overview
Problem
Electrophotographic apparatuses experience image blurring and reduced cleanability in high-temperature and high-humidity environments due to moisture adsorption, which affects the resistance of the electrophotographic photosensitive member's surface layer.
Innovation Solution
Incorporating a polydimethylsiloxane with a polyester chain and oleamide into the surface layer of the electrophotographic photosensitive member to prevent moisture adsorption and maintain high cleanability, while using a metal oxide particle to ensure charge transport performance without reducing light transmissivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a resin having a polydimethylsiloxane structure is contained in the surface layer to maintain high cleanability, then cleanability is ensured, but image blurring occurs in high-temperature and high-humidity environments
Solution Approach 1:
The patent combines polydimethylsiloxane with polyester chain and oleamide in a composite surface layer structure. This composite material approach allows the surface layer to simultaneously achieve high cleanability through polydimethylsiloxane while preventing image blurring through the synergistic effects of polyester chain and oleamide, particularly in high-temperature and high-humidity environments.
Solution Approach 2:
The patent modifies the chemical composition parameters of the surface layer by incorporating specific ratios of polydimethylsiloxane, polyester chain, and oleamide. By adjusting these compositional parameters, the surface layer maintains appropriate resistance characteristics and moisture adsorption properties that prevent image blurring while preserving cleanability across different environmental conditions.
2Object-affected harmful factors
If the surface layer composition is modified to prevent image blurring, then image quality is improved, but cleanability may be reduced
Solution Approach 1:
The patent employs a composite material system where polydimethylsiloxane provides cleanability, polyester chain contributes to structural stability and resistance properties, and oleamide prevents image blurring. This multi-component composite ensures both cleanability and image quality are maintained simultaneously.
Solution Approach 2:
The surface layer is designed with specific local compositional characteristics where polydimethylsiloxane, polyester chain, and oleamide are distributed to create regions with optimized properties. This local quality approach ensures that different areas of the surface layer contribute differently to cleanability and image quality based on their compositional characteristics.
3Reliability
If metal oxide particles are added to ensure charge transport performance, then charge transport is improved, but light transmissivity may be reduced
Solution Approach 1:
The patent optimizes the concentration and particle size parameters of metal oxide particles in the surface layer. By controlling these parameters, the surface layer achieves sufficient charge transport performance while minimizing the impact on light transmissivity, maintaining a balance between electrical and optical properties.
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 effectively suppresses image blurring and maintains high cleanability in high-temperature and high-humidity conditions, ensuring the electrophotographic photosensitive member's durability and performance.
Implementation Method 1
moisture adsorption, which affects the resistance of the electrophotographic photosensitive member's surface layer
Data Source
AI summary
To provide an electrophotographic photosensitive member having high cleanability and hardly causing image blurring to occur even in use in a high-temperature and high-humidity environment. An electrophotographic photosensitive member having a surface layer containing a binder resin, wherein the surface layer contains a polydimethylsiloxane having a polyester chain, and oleamide.