Electrophotographic Belt Electrolyte Bleeding Suppression
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Solution Overview
Problem
Electrophotographic belts with incorporated electrolytes suffer from electrolyte bleeding due to DC bias application, leading to changes in electroconductivity and surface roughness, which affects the efficiency of toner image transfer in electrophotographic image forming apparatuses.
Innovation Solution
An electrophotographic belt is developed using a resin composition containing a crystalline resin, an electrolyte, and an oil-soluble dye, where the dye's bulky structure prevents electrolyte migration in the amorphous region, minimizing surface roughness and electrolyte bleeding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large amount of hydrotalcite is added to suppress electrolyte bleeding, then electrolyte bleeding is suppressed, but the surface of the electrophotographic belt becomes excessively rough
Solution Approach 1:
The patent introduces a binder resin as an intermediary substance between the hydrotalcite filler and the electrolyte. The binder resin has specific properties (amorphous structure, glass transition temperature between -50°C to 0°C, and specific viscosity) that allow it to effectively suppress electrolyte bleeding while preventing excessive surface roughness. This intermediary layer enables the hydrotalcite to function without directly exposing its rough surface structure.
Solution Approach 2:
The patent specifies precise parameter ranges for the binder resin including glass transition temperature (-50°C to 0°C), viscosity (100 to 1000 cP), and amorphous content (80% or more). By controlling these parameters, the binder resin achieves optimal balance between electrolyte bleeding suppression and surface smoothness, resolving the contradiction between reliability and manufacturing precision.
2Reliability
If an electrolyte is incorporated into the binder resin to provide electroconductivity, then electroconductivity is achieved, but electrolyte bleeding occurs over time due to DC bias application
Solution Approach 1:
The binder resin serves as an intermediary matrix that holds the electrolyte while preventing its migration. The specific glass transition temperature and viscosity ranges of the binder resin create an optimal environment that maintains electrolyte stability under DC bias conditions, preventing bleeding while preserving electroconductivity.
Solution Approach 2:
The patent creates a composite material system consisting of crystalline resin, amorphous binder resin, electrolyte, and hydrotalcite filler. This composite structure leverages the complementary properties of each component: the crystalline resin provides structural stability, the amorphous binder resin controls electrolyte mobility, and the hydrotalcite enhances bleeding suppression, collectively resolving the contradiction between electroconductivity and composition stability.
3Ease of operation
If the electrophotographic belt is used as an intermediate transfer belt, then toner image transfer function is achieved, but electrolyte deposition on the surface affects transfer efficiency
Solution Approach 1:
The binder resin acts as an intermediary layer between the electrolyte bulk and the belt surface. It allows the electrolyte to remain dissolved in the bulk phase for maintaining electroconductivity while preventing its deposition on the surface, thereby preserving both transfer function and transfer efficiency.
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 electrolyte bleeding while maintaining the surface properties of the electrophotographic belt, enabling stable high-quality image formation in electrophotographic image forming apparatuses.
Implementation Method 1
electroconductivity resulting from dissociation of an electrolyte
Implementation Method 2
the dye's bulky structure prevents electrolyte migration in the amorphous region
Data Source
AI summary
An electrophotographic belt which enables the suppression of bleeding of an electrolyte while minimizing influence on its surface smoothness. The electrophotographic belt showing electroconductivity resulting from dissociation of an electrolyte is made of a resin composition containing a crystalline resin as a binder resin, an oil-soluble dye and an electrolyte.