Vegetable Black Ink Dispersion via Metal Ion Complexation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ink jet inks using vegetable black-derived colorants face challenges with high sedimentation properties due to large particle diameters, leading to degradation in ejection stability and storage stability.
Innovation Solution
A water-based ink jet ink composition containing a vegetable black-derived colorant, a lignosulfonate salt, and specific metal elements (Ca, Mg, Mn, Fe, Al, Si, Cr, Ni, Sr, and Ba) at concentrations of 50 to 1,700 mass ppm, which improves dispersion stability and storage stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If vegetable black-derived colorant is used in ink jet ink, then natural safety and environmental friendliness are improved, but sedimentation rate increases due to large particle diameter
Solution Approach 1:
The patent introduces metal elements (Ca, Mg, Mn, Fe, Al, Si, Cr, Ni, Sr, or Ba) as intermediary substances that interact with vegetable black particles. These metal elements form complexes with the vegetable black, reducing particle aggregation and improving dispersion stability, thereby suppressing sedimentation while maintaining the natural safety of the ink composition.
Solution Approach 2:
The patent changes the chemical composition parameters of the ink by adding specific metal elements at controlled concentrations (50 to 1,700 mass ppm). This parameter change modifies the interaction between ink components and vegetable black particles, improving ejection stability and reducing sedimentation rate while preserving the natural characteristics of the ink.
2Object-affected harmful factors
If vegetable black-derived colorant with large particle diameter is used, then natural safety is improved, but ejection stability degrades
Solution Approach 1:
Metal elements serve as intermediary substances that form stable complexes with vegetable black particles. This complexation prevents particle aggregation and ensures uniform ink ejection, thereby improving ejection stability while maintaining the natural safety benefits of vegetable black-derived colorants.
Solution Approach 2:
By adjusting the concentration of metal elements (50 to 1,700 mass ppm) in the ink composition, the patent optimizes the interaction between ink components and vegetable black particles. This parameter optimization ensures stable ink ejection performance while preserving the natural safety characteristics.
3Object-affected harmful factors
If vegetable black-derived colorant is used, then environmental friendliness is improved, but storage stability decreases
Solution Approach 1:
Metal elements act as intermediary substances that form stable complexes with vegetable black particles during storage. This complexation prevents particle aggregation and sedimentation, thereby improving storage stability while maintaining the environmental friendliness of the natural-based ink composition.
Solution Approach 2:
The patent optimizes the concentration of metal elements (50 to 1,700 mass ppm) to achieve optimal storage stability. This parameter control ensures that the ink maintains its performance characteristics over time while preserving the environmental benefits of using naturally-derived colorants.
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 ink composition achieves enhanced storage stability and printing stability, with improved ejection stability and reduced sedimentation rates, allowing for stable recording even with repetitive printing.
Implementation Method 1
a water-based ink jet ink composition which contains a vegetable black-derived colorant, a lignosulfonate salt, and an element A which includes at least one selected from the group consisting of Ca, Mg, Mn, Fe, Al, Si, Cr, Ni, Sr, and Ba
Implementation Method 2
an ink composition using a vegetable black has a high sedimentation property because of its large particle diameter
Implementation Method 3
a lignosulfonate salt
Data Source
AI summary
An ink jet ink composition is a water-based ink jet ink composition and includes a vegetable black-derived colorant, a lignosulfonate salt, and an element A which includes at least one selected from the group consisting of Ca, Mg, Mn, Fe, Al, Si, Cr, Ni, Sr, and Ba, and a content of the element A with respect to a total mass of the ink composition is 50 to 1,700 mass ppm.