Photosensitive Layer Resin Composition to Prevent Peeling and Wear
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Solution Overview
Problem
Existing electrophotographic photosensitive members suffer from insufficient abrasion resistance and film peeling issues, particularly in the formation of the photosensitive layer.
Innovation Solution
The photosensitive member incorporates a photosensitive layer containing a first resin with specific repeating units and a second resin, where the first resin is a polyarylate with a defined percentage content, and the second resin is a polyester, enhancing abrasion resistance and inhibiting film peeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a photosensitive body with high sensitivity is used to enable dark storage without a light-tight container, then ease of operation is improved, but image quality deteriorates due to fogging
Solution Approach 1:
The patent segments the photosensitive layer into multiple functional components: a base photosensitive layer and an additional layer containing specific compounds (compounds of formula (1) and (2)) that act as fogging inhibitors. This segmentation allows the system to maintain high sensitivity while preventing unwanted dark reactions through the specialized additional layer.
Solution Approach 2:
The patent introduces intermediary compounds (compounds of formula (1) and (2)) that mediate between the high-sensitivity photosensitive materials and the environment. These compounds specifically inhibit fogging during dark storage and handling without interfering with the desired photoreaction, thus maintaining image quality while enabling ease of operation.
2Ease of operation
If sensitivity is increased to allow exposure at lower illuminance, then ease of operation is improved, but reliability deteriorates due to fogging in the image-forming region
Solution Approach 1:
The patent applies local quality by placing specific fogging-inhibiting compounds (compounds of formula (1) and (2)) in a strategically positioned additional layer that covers the image-forming region. This localized application ensures that sensitivity is enhanced where needed while fogging is suppressed specifically in the critical image-forming areas.
Solution Approach 2:
The patent introduces intermediary compounds (compounds of formula (1) and (2)) that mediate between the high-sensitivity photosensitive materials and the environment. These compounds specifically inhibit fogging during dark storage and handling without interfering with the desired photoreaction, thus maintaining image quality while enabling ease of operation.
3Ease of manufacture
If conventional photosensitive bodies are used, then manufacturing simplicity is maintained, but productivity decreases due to requirement of light-tight containers and controlled handling
Solution Approach 1:
The patent segments the photosensitive layer into multiple functional components: a base photosensitive layer and an additional layer containing specific compounds (compounds of formula (1) and (2)) that act as fogging inhibitors. This segmentation allows the system to maintain high sensitivity while preventing unwanted dark reactions through the specialized additional layer.
Solution Approach 2:
The patent introduces intermediary compounds (compounds of formula (1) and (2)) that mediate between the high-sensitivity photosensitive materials and the environment. These compounds specifically inhibit fogging during dark storage and handling without interfering with the desired photoreaction, thus maintaining image quality while enabling ease of operation.
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 results in a favorably formed photosensitive layer with improved abrasion resistance and reduced film peeling, ensuring better durability and performance.
Implementation Method 1
An electrophotographic photosensitive body comprises an organic photosensitive layer which has a photodissociation type electrophotographic photosensitivity
Implementation Method 2
An electrophotographic photosensitive body comprises an organic photosensitive layer which has a photodissociation type electrophotographic photosensitivity and photoconductivity
Data Source
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AI summary
An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer contains a charge generating material, a hole transport material, a first resin, and a second resin. The first resin is contained in the same layer as the second resin. The second resin has a percentage content of at least 1% and no greater than 3% to the total mass of the first resin and the second resin. The first resin includes repeating units represented by formulas (1), (2), (3), and (4). The repeating unit represented by the formula (3) has a percentage content of greater than 0% and less than 20% to the total number of repeats of the repeating units represented by the formulas (1) and (3). The second resin is a polyester resin different from the first resin.