Fluorinated Hydrotalcite Toner for Stable Charge Distribution
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Solution Overview
Problem
Existing toners used in electrophotographic image forming apparatuses with higher speeds and longer service life face issues with replenishment fog and deteriorated solid followability due to electrification differences between new and old toners, particularly in low-temperature and low-humidity environments.
Innovation Solution
A toner composition comprising strontium titanate and hydrotalcite particles with fluorine inside the hydrotalcite, where the area ratio of strontium titanate to hydrotalcite is controlled between 0.15 to 9.00, ensuring quick electrification stabilization and minimizing electrification differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional toners are used in high-speed, long-life electrophotographic apparatuses, then productivity increases, but replenishment fog occurs and solid followability deteriorates due to electrification differences between new and old toners
Solution Approach 1:
The patent changes the chemical composition parameters of the toner by incorporating fluorine-containing compounds and controlling the ratio of basic to acidic components. This modifies the electrification characteristics to ensure stable electrification even after long-term use, preventing replenishment fog while maintaining high-speed operation capability
Solution Approach 2:
The patent uses a composite toner formulation combining multiple components including fluorine-containing compounds, specific binder resins, and carefully balanced basic/acidic components. This composite structure creates synergistic effects that stabilize electrification properties over extended usage periods in high-speed apparatuses
2Adaptability or versatility
If conventional toners are used in low-temperature and low-humidity environments, then basic operation is maintained, but solid followability deteriorates and replenishment fog occurs
Solution Approach 1:
The patent adjusts the electrification parameters by incorporating fluorine-containing compounds and controlling the basic/acidic component ratio, which stabilizes electrification characteristics across varying environmental conditions including low-temperature and low-humidity environments, preventing solid followability deterioration and replenishment fog
3Reliability
If hydrotalcite particles are used as external additives, then electrification stability improves, but replenishment fog occurs due to electrostatic aggregation of detached particles
Solution Approach 1:
The patent introduces fluorine-containing compounds as intermediary substances that modify the surface properties of external additives like hydrotalcite particles. This prevents direct electrostatic aggregation of detached particles while maintaining their electrification stability function, thereby eliminating replenishment fog generation
Solution Approach 2:
The patent modifies the electrification parameters of the toner system by adding fluorine-containing compounds, which changes the electrostatic characteristics of detached external additive particles. This prevents their aggregation into harmful concentrations that cause replenishment fog, while preserving the electrification stability benefits
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 toner achieves stable electrification and reduces replenishment fog, enhancing solid followability and image quality in high-speed, long-life electrophotographic devices by maintaining uniform electrification distribution.
Implementation Method 1
a toner particle comprising a binder resin, a strontium titanate particle on a surface of the toner particle, and a hydrotalcite particle on a surface of the toner particle, wherein the hydrotalcite particle comprises fluorine
Data Source
AI summary
A toner comprising a toner particle comprising a binder resin, and a strontium titanate particle and a hydrotalcite particle on a surface of the toner particle, wherein the hydrotalcite particle comprises fluorine, the fluorine is present inside the hydrotalcite particle in line analysis of STEM-EDS mapping analysis of the toner, and when an area ratio of the strontium titanate particle to the toner particle in an EDS measurement field, which is measured through the STEM-EDS mapping analysis of the toner, is defined as T1 (%) and an area ratio of the hydrotalcite particle to the toner particle in the EDS measurement field, which is measured through the STEM-EDS mapping analysis of the toner, is defined as H1 (%),T1/H1 is 0.15 to 9.00.