Water-Based Inkjet Ink Composition for Wetting-Drying Balance
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Solution Overview
Problem
Existing water-based inkjet inks face a trade-off between wettability and drying properties on non-ink-absorbent media, with insufficient performance on both less ink-absorbent and non-ink-absorbent printing surfaces.
Innovation Solution
An inkjet ink formulation containing specific organic compounds in defined ratios, along with a coloring agent and water, optimized to achieve both good wettability and drying properties on non-ink-absorbent media.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If organic solvents and surfactants are added to water-based ink to improve wettability, then wettability on non-ink-absorbent medium is improved, but drying properties deteriorate
Solution Approach 1:
The patent changes the chemical parameters of the organic compounds used in the ink formulation. Specifically, it employs organic compounds with controlled hydrophobicity (log P values between 2.0 and 4.0) and specific functional groups that provide both wettability enhancement and rapid evaporation characteristics, resolving the trade-off between wettability and drying properties
Solution Approach 2:
The patent uses a composite organic compound system consisting of multiple components with different functions: compounds for wettability enhancement, compounds for rapid evaporation, and compounds for adhesion promotion. This composite approach allows simultaneous achievement of good wettability and drying properties that cannot be obtained with single compounds
2Speed
If drying properties are excessively improved, then drying speed is enhanced, but image resolution deteriorates due to premature drying before sufficient wetting and spreading
Solution Approach 1:
The patent applies preliminary wetting action through organic compounds that rapidly spread the ink across the non-ink-absorbent medium surface before evaporation occurs. This preliminary spreading ensures sufficient coverage and resolution before the drying process begins, preventing premature drying from degrading image quality
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 exhibits excellent wettability and drying properties on non-ink-absorbent media, ensuring high-resolution image quality and stable ink adhesion.
Implementation Method 1
an organic compound and a surfactant are generally used in a water-based ink to improve wettability
Implementation Method 2
it is necessary to dry moisture or an organic solvent in the ink
Data Source
AI summary
An inkjet ink which contains a coloring agent, an organic compound excluding the coloring agent, and water, and in which the organic compound contains a compound a such as diethyleneglycol monohexyl ether, a compound b such as 1,8-octane diol, and a compound c such as 1,5-pentane diol, and relationships of (a)≤(c) and 0.1≤(c)/(b)≤50 are satisfied, when (a) represents, in parts by mass, the total contained amount of the compound a with respect to 100 parts by mass of the ink, (b) represents, in parts by mass, the total contained amount of the compound b with respect to 100 parts by mass of the ink, and (c) represents, in parts by mass, the total contained amount of the compound c with respect to 100 parts by mass of the ink.