Photosensitive Layer Carboxylic Acid Anhydride Additive
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electrophotographic photosensitive members face challenges in maintaining stable surface potential and toner image transferring ability, especially in high temperature and humidity environments, due to reduced surface potential and inefficient toner image transfer.
Innovation Solution
Incorporating a carboxylic acid anhydride as an additive in the photosensitive layer with a reduction potential of at least -1.40 V, within specific mass ratios relative to the binder resin, to enhance electric resistance and uniform dispersion, thereby maintaining stable surface potential and improving toner image transferring ability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-layer photosensitive member is used to implement both charge generating and charge transport functions, then device complexity is reduced, but stable surface potential and toner image transferring ability deteriorate in high temperature and humidity environments
Solution Approach 1:
The patent introduces a carboxylic acid anhydride additive with specific reduction potential parameters (≥-1.40V) into the photosensitive layer, changing the chemical composition parameters to improve surface potential stability and toner transfer ability while maintaining the single-layer structure
Solution Approach 2:
The patent creates a composite photosensitive layer by combining charge generating material, charge transport material, binder resin, and carboxylic acid anhydride additive in specific proportions, achieving enhanced reliability through material composition optimization
2Reliability
If the amount of carboxylic acid anhydride additive is increased to improve toner image transferring ability, then manufacturing precision may deteriorate due to dispersion control difficulties
Solution Approach 1:
The patent specifies precise quantitative parameters for the carboxylic acid anhydride additive (0.02-10.00 parts by mass relative to 100 parts by mass of binder resin) to optimize both toner transfer ability and dispersion uniformity, preventing manufacturing defects
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 use of carboxylic acid anhydride in the photosensitive layer ensures both excellent sensitivity characteristics and toner image transferring ability, preventing image defects caused by reduced toner transfer efficiency.
Implementation Method 1
a electrophotographic photosensitive member includes a photosensitive layer containing a charge generating material, a hole transport material, an electron transport material, and a binder resin
Implementation Method 2
The photosensitive layer for example contains a charge generating material, a charge transport material
Data Source
Figure 1A~1C
Figure 2
Figure 3
AI summary
An electrophotographic photosensitive member (1) includes a conductive substrate (2) and a photosensitive layer (3). The photosensitive layer (3) is a single-layer photosensitive layer. The photosensitive layer (3) contains a charge generating material, a hole transport material, an electron transport material, a binder resin, and an additive. The additive contains a carboxylic acid anhydride. A reduction potential of the carboxylic acid anhydride is at least -1.40 V versus a reference electrode (Ag/Ag+). The carboxylic acid anhydride is contained in an amount of at least 0.02 parts by mass and no greater than 10.00 parts by mass relative to 100 parts by mass of the binder resin.