Ink jet textile-printing ink composition, recording method, and recorded material
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Solution Overview
Problem
Ink jet textile-printing ink compositions using acidic dyes with high hydrophobicity face issues of nozzle plugging and poor ejection reliability due to low solubility, affecting the formation of predetermined patterns.
Innovation Solution
An ink jet textile-printing ink composition containing an acidic dye with water solubility of 30 g/L or less, combined with a glycol-based and cyclic-amide-based solvent, including ε-caprolactam and N-hydroxyethyl-2-pyrrolidone, to enhance wet color fastness and prevent nozzle plugging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an acidic dye with high hydrophobicity is used, then wet color fastness is improved, but solubility decreases causing nozzle plugging
Solution Approach 1:
The patent introduces glycol-based solvents and cyclic-amide-based solvents as intermediary substances that mediate between the hydrophobic acidic dye and water. These intermediary solvents enhance the solubility of hydrophobic dyes in the aqueous ink formulation, preventing precipitation and nozzle plugging while allowing the dyes to maintain their hydrophobic character for achieving high wet color fastness on fabric
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 solution ensures excellent ejection reliability and wet color fastness of the recorded material, reducing nozzle plugging and maintaining stable ink jet performance.
Implementation Method 1
an ink jet textile-printing ink composition contains an acidic dye having water solubility of 30 g/L or less at 20° C., a water-soluble organic solvent, and water, wherein a glycol-based solvent and a cyclic-amide-based solvent are contained as the water-soluble organic solvent
Data Source
AI summary
An ink jet textile-printing ink composition according to the present disclosure contains an acidic dye having water solubility of 30 g/L or less at 20° C., a water-soluble organic solvent, and water, wherein a glycol-based solvent and a cyclic-amide-based solvent are contained as the water-soluble organic solvent, and the cyclic-amide-based solvent contains one or both of ε-caprolactam and N-hydroxyethyl-2-pyrrolidone.