Aqueous Ink Jet Composition Acid Value Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Aqueous ink jet inks face issues with ejection stability and adhesion resistance when used on low or non-absorbing recording media, due to resin fine particle deposition in the ink jet head and instability of resin dispersion, leading to inferior abrasion resistance of recorded matter.
Innovation Solution
An aqueous ink jet ink composition with a total acid value of resin fine particles and dispersant resin of 200 mg KOH/100 g or less, incorporating a non-ionic surfactant, and a resin dissolving solvent within specific concentration ranges, which maintains dispersion stability and enhances adhesion and abrasion resistance while ensuring ejection stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If resin fine particles with high acid value are used to improve dispersion stability, then dispersion stability is improved, but adhesion resistance deteriorates
Solution Approach 1:
The patent changes the acid value parameter of the resin fine particles from high (conventional) to low (20-80 mg KOH/g), which fundamentally alters the chemical properties of the resin. This parameter change enables both good dispersion stability and excellent adhesion resistance, resolving the technical contradiction between these two properties.
2Strength
If resin dissolving solvent is added to promote film formation, then adhesion resistance is improved, but ejection stability deteriorates
Solution Approach 1:
The patent changes the concentration parameter of the resin dissolving solvent from high to low (0.1-10 wt%), and combines this with using low acid value resin fine particles. This parameter change allows the ink to maintain ejection stability while still achieving good adhesion resistance through film formation.
3Strength
If ink concentration is increased to improve recorded matter properties, then abrasion resistance is improved, but deposition in ink jet head occurs
Solution Approach 1:
The patent changes the acid value parameter of the resin fine particles to low (20-80 mg KOH/g), which prevents deposition in the ink jet head even when ink concentration is increased. This enables the formulation of concentrated ink with high abrasion resistance without the harmful deposition effect.
4Object-affected harmful factors
If aqueous ink is used for environmental safety, then safety is improved, but ejection stability and adhesion resistance deteriorate
Solution Approach 1:
The patent changes the acid value parameter of the resin fine particles to low (20-80 mg KOH/g) and optimizes the concentration of resin dissolving solvent (0.1-10 wt%). These parameter changes enable aqueous ink to achieve both ejection stability and adhesion resistance, resolving the technical contradiction between safety and performance.
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 composition achieves excellent ejection stability and adhesion resistance during recording, even on low or non-absorbing media, by preventing resin particle deposition and improving film formation, resulting in high-quality images with improved durability.
Implementation Method 1
an aqueous ink jet ink composition including resin fine particles, a non-ionic surfactant, a resin dissolving solvent, and water
Implementation Method 2
a non-ionic surfactant makes it possible to obtain dispersion stability
Implementation Method 3
a resin dissolving solvent may be used to dissolve resin on a recording medium to promote film formation
Implementation Method 4
a total acid value of an acid value of the resin fine particles and an acid value of a dispersant resin when the aqueous ink jet ink composition includes a dispersant resin is 200 (mg KOH/100 g ink) or less
Data Source
AI summary
An aqueous ink jet ink composition includes resin fine particles, a non-ionic surfactant, a resin dissolving solvent, and water, in which, in the aqueous ink jet ink composition, a total acid value of an acid value of the resin fine particles and an acid value of the dispersant resin when the aqueous ink jet ink composition includes a dispersant resin is 200 (mg KOH/100 g ink) or less.