Inkjet Ink Composition for Controlled Drying on Non-Absorbent Media
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Solution Overview
Problem
Existing inkjet inks for non-absorbent recording mediums face issues with excessive drying leading to ink component agglomeration and bleeding or insufficient drying causing image irregularities.
Innovation Solution
The ink formulation includes specific components like cellulose derivatives, glycol ethers, and surfactants to achieve a volume reduction rate of 25% to 45% within 22 seconds, ensuring controlled drying and preventing bleeding and irregularities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the ink dries too quickly on non-absorbent recording medium, then the drying speed is improved, but ink component agglomeration and bleeding occur
Solution Approach 1:
The patent modifies the chemical composition parameters of the ink by incorporating specific cellulose derivatives (0.01-0.20% by mass) and adjusting the balance between water-soluble organic solvents and water. This parameter change controls the evaporation rate and drying kinetics, achieving a volume reduction rate of 25-45% within 22 seconds while preventing agglomeration and bleeding on non-absorbent recording mediums.
2Manufacturing precision
If the ink dries too slowly on non-absorbent recording medium, then image uniformity is improved, but insufficient drying causes image irregularities
Solution Approach 1:
The patent adjusts the ink composition parameters, specifically incorporating cellulose derivatives (0.01-0.20% by mass) and optimizing the ratio of water-soluble organic solvents to water (70-95% and 5-30% by mass respectively). These parameter changes enable the ink to achieve adequate drying within 22 seconds while maintaining image uniformity and preventing irregularities on non-absorbent recording mediums.
3Manufacturing precision
If the volume reduction rate is increased to prevent bleeding, then image quality is improved, but ink component agglomeration occurs
Solution Approach 1:
The patent optimizes the chemical composition parameters by adding cellulose derivatives (0.01-0.20% by mass) and adjusting the solvent system (water-soluble organic solvent 70-95% by mass, water 5-30% by mass). This parameter optimization achieves a controlled volume reduction rate of 25-45% within 22 seconds, preventing bleeding while maintaining uniform ink component distribution and avoiding agglomeration.
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 controlled drying rate inhibits ink component agglomeration and bleeding on non-absorbent surfaces, resulting in high-quality image formation without irregularities.
Implementation Method 1
V22 represents a second volume of the liquid droplet when 22 seconds elapse from the landing of the liquid droplet on the non-absorbent recording medium
Data Source
AI summary
An inkjet ink has a volume reduction rate ΔV calculated using formula (1) “ΔV=100×(V0−V22)/V0” of at least 25% and no greater than 45%. In the formula (1), V0 represents a first volume of a liquid droplet of the inkjet ink at landing, on a non-absorbent recording medium, of the inkjet ink dropped onto the non-absorbent recording medium. V22 represents a second volume of the liquid droplet when 22 seconds elapse from the landing of the liquid droplet on the non-absorbent recording medium.