Aqueous Inkjet Ink Diol Solvent Drying
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Solution Overview
Problem
Aqueous inkjet inks struggle with image quality on non-porous substrates due to poor drying properties and surface roughness, leading to issues like strike-through and loss of gloss, as they do not penetrate well and form uneven layers.
Innovation Solution
An aqueous ink formulation containing water, hydrosoluble organic solvents with a combination of at least three diol compounds, where the diol compounds account for 45% by weight or more, and have boiling points 10°C or greater apart, to slow down the evaporation and solidification process, ensuring a uniform and high-gloss layer formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If aqueous ink is used on non-porous substrates, then environmental burden is reduced, but drying property deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters of the organic solvent by incorporating specific diol compounds (ethylene glycol, propylene glycol, butylene glycol) in controlled proportions. This modifies the evaporation characteristics of the aqueous ink, enabling it to dry appropriately on non-porous substrates while maintaining environmental benefits.
Solution Approach 2:
The patent creates a composite solvent system combining water with multiple organic solvents (diol compounds and their ethers) in specific ratios. This composite formulation achieves both environmental friendliness and improved drying properties by leveraging the complementary characteristics of each component.
2Area of stationary object
If aqueous ink forms a layer on non-porous substrate, then image coverage is achieved, but surface roughness increases
Solution Approach 1:
The patent modifies the physical parameters of the ink formulation by adjusting solvent composition, resin particle size distribution, and concentration ratios. These parameter changes enable the ink to form smooth, uniform layers on non-porous substrates while maintaining adequate coverage.
Solution Approach 2:
The patent employs resin particles with specific size distributions and surface properties that interact differently with the substrate at the micro-level. This local optimization of particle characteristics ensures smooth layer formation while maintaining overall coverage.
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 achieves improved drying properties, prevents strike-through, and maintains high gloss and abrasion resistance on non-porous substrates, enhancing the overall image quality and durability of printed materials.
Implementation Method 1
three or more of the at least three kinds of diol compounds have boiling points 10° C. or greater apart from each other
Data Source
AI summary
An aqueous ink for inkjet recording contains water, a hydrosoluble organic solvent, resin particles, and a pigment, wherein the hydrosoluble organic solvent contains at least three kinds of diol compounds accounting for 45% by weight or more in the hydrosoluble organic solvent, wherein three or more of the at least three kinds of diol compounds have boiling points 10° C. or greater apart from each other.