Electrophotographic Photosensitive Member Protection Layer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electrophotographic photosensitive members experience smeared images and exposure memory issues under high-temperature and high-humidity environments due to inadequate abrasion resistance and moisture infiltration, which affects image quality and durability.
Innovation Solution
A protection layer with a triarylamine structure and cyclic structure, represented by specific general formulas, is applied to the electrophotographic photosensitive member, enhancing frictional force and elasticity while controlling moisture penetration through a defined A-value ratio, thereby suppressing smeared images and maintaining exposure memory.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a protection layer is applied to improve abrasion resistance, then mechanical durability is improved, but smeared images occur due to increased surface resistance and moisture infiltration
Solution Approach 1:
The invention changes the chemical composition parameters of the protection layer by incorporating specific compounds (compounds 1-6) with defined molecular structures containing nitrogen atoms and aromatic rings. This compositional parameter change enables the protection layer to simultaneously achieve abrasion resistance and maintain electrical properties that prevent smeared images
Solution Approach 2:
The invention uses composite materials by combining the protection layer compound with specific resins (polyester resin, polycarbonate resin, acrylic resin, or polyvinyl butyral resin) in defined weight ratios. This composite structure integrates the wear-resistant properties of the protection layer compound with the mechanical durability and electrical properties of the resin matrix, resolving the contradiction between abrasion resistance and image quality
2Duration of action of stationary object
If the protection layer composition is optimized for durability, then mechanical strength is improved, but exposure memory increases under high-temperature and high-humidity storage
Solution Approach 1:
The invention optimizes the molecular structure parameters of the protection layer compound by incorporating specific functional groups (aromatic rings, nitrogen-containing groups) that provide both durability through strong intermolecular forces and resistance to moisture infiltration, thereby preventing exposure memory while maintaining mechanical strength
Solution Approach 2:
The invention creates an inert environment within the protection layer by using compounds with aromatic ring structures and nitrogen-containing groups that are chemically stable and resistant to moisture penetration. This inert chemical environment prevents the electrostatic latent image from deteriorating during high-temperature and high-humidity storage, eliminating exposure memory while preserving durability
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 reduces smeared images and exposure memory issues, ensuring improved image quality and durability even under harsh environmental conditions.
Implementation Method 1
controlling moisture penetration through a defined A-value ratio
Implementation Method 2
enhancing frictional force and elasticity
Data Source
AI summary
The present invention provides an electrophotographic photosensitive member sequentially including: a support; a photosensitive layer; and a protection layer formed on the support, wherein the protection layer has a triarylamine structure and a specific cyclic structure, and a specific A-value obtained by measurement using total reflection Fourier transform infrared spectroscopy is 0.010 or more and 0.050 or less.