Layered-Structure Compound Particles in Toner for Color Streak Prevention
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Solution Overview
Problem
Existing electrostatic charge image development toners often generate color streaks due to toner or external additives passing through the cleaning blade of an intermediate transfer body, especially during high-density image formation, as the layered-structure compound particles either fail to provide sufficient lubrication or become detached, leading to uneven distribution.
Innovation Solution
The electrostatic charge image development toner incorporates layered-structure compound particles with specific crystallite diameters (150 Å to 250 Å) and number-average particle diameters (0.3 μm to 2.0 μm) that effectively exhibit a lubrication effect, preventing color streaks by optimizing their ratio to the toner particles and ensuring proper distribution on the intermediate transfer body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If layered-structure compound particles with small crystallite diameter are used, then the toner provides good flowability and charging characteristics, but the particles fail to provide sufficient lubrication effect causing color streaks
Solution Approach 1:
The patent applies parameter changes by precisely controlling the crystallite diameter of layered-structure compound particles within 150 Å to 250 Å and the number-average particle diameter Dn within 0.3 μm to 2.0 μm. This optimization balances the lubrication effect with flowability and charging characteristics, preventing color streaks while maintaining operational ease.
Solution Approach 2:
The patent uses composite materials by combining toner particles with specifically sized layered-structure compound particles (melamine cyanurate). This composite structure provides both the lubrication effect from the layered compounds and the desired flowability and charging characteristics from the toner particles.
2Reliability
If layered-structure compound particles with large crystallite diameter are used, then the toner provides sufficient lubrication effect, but the particles become detached and fail to distribute evenly causing color streaks
Solution Approach 1:
The patent applies parameter changes by optimizing the crystallite diameter to 150 Å to 250 Å and the number-average particle diameter Dn to 0.3 μm to 2.0 μm. This precise parameter control ensures the particles maintain their lubrication effect while remaining stable and uniformly distributed on the intermediate transfer body.
3Strength
If the ratio of layered-structure compound particles to toner particles is not optimized, then the toner may provide good adhesion, but color streaks occur due to uneven distribution or insufficient lubrication
Solution Approach 1:
The patent applies parameter changes by optimizing the ratio of layered-structure compound particles to toner particles through controlling the number-average particle diameter Dn and volume-average particle diameter Dv. This ensures both good adhesion and consistent image quality without color streaks.
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 optimized toner particles and layered-structure compound particles combination significantly reduces color streaks by enhancing lubrication and ensuring consistent supply to the intermediate transfer body, maintaining image quality during continuous high-density image formation.
Implementation Method 1
the layered-structure compound particles have a number-average particle diameter Dn of 0.3 μm or more and 2.0 μm or less... effectively exhibit a lubrication effect
Data Source
AI summary
An electrostatic charge image development toner contains toner particles and layered-structure compound particles. The layered-structure compound particles have a crystallite diameter of 150 Å or more and 250 Å or less as calculated from a maximum peak width in a Cu Kα X-ray diffraction chart and have a number-average particle diameter Dn of 0.3 μm or more and 2.0 μm or less. The ratio Dn/Dv of a number-average particle diameter Dn of the layered-structure compound particles to a volume-average particle diameter Dv of the toner particles is 0.03 or more and 0.7 or less.