Ink Composition For Ink Jet Textile Printing
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Solution Overview
Problem
Ink compositions for ink jet textile printing using acidic dyes like C.I. Acid Blue 112 and C.I. Acid Blue 140 face issues with storage stability and nozzle clogging, leading to poor ejection reliability.
Innovation Solution
An ink composition containing C.I. Acid Blue 112 or C.I. Acid Blue 140, a glycol-based solvent, and a cyclic amide-based solvent, such as ε-caprolactam or N-hydroxyethyl-2-pyrrolidone, with a glycol-based solvent content of 10% or more, which reduces flocculation and improves resolubility, thereby enhancing storage stability and ejection reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If an acidic dye having high hydrophobicity (C.I. Acid Blue 112 or C.I. Acid Blue 140) is used, then the fastness of the recorded product is improved and the color reproduction area is expanded, but the storage stability of the ink composition reduces and nozzle clogging occurs
Solution Approach 1:
The patent changes the chemical composition parameters of the ink by introducing specific solvent systems (glycol-based solvents like diethylene glycol monobutyl ether and cyclic amide-based solvents like N-methyl-2-pyrrolidone) and adjusting their proportions. This resolves the contradiction by modifying the ink's chemical parameters to maintain dye stability in storage while preserving the high fastness properties of the hydrophobic acidic dyes during printing.
Solution Approach 2:
The patent uses specific solvents as intermediary substances between the hydrophobic acidic dye and the aqueous ink medium. These intermediary solvents (glycol-based and cyclic amide-based solvents) act as mediators that prevent direct interaction causing flocculation, thereby maintaining storage stability while allowing the dye to function effectively for achieving good fastness and color reproduction.
2Strength
If an acidic dye having high hydrophobicity (C.I. Acid Blue 112 or C.I. Acid Blue 140) is used, then the fastness of the recorded product is improved, but nozzle clogging is likely to occur and ejection reliability is poor
Solution Approach 1:
The patent modifies the physical and chemical parameters of the ink composition by controlling viscosity through specific solvent selection and adjusting surface tension properties. The glycol-based solvents and cyclic amide-based solvents work together to optimize these parameters, ensuring the ink flows properly through nozzles for reliable ejection while maintaining the fastness properties of the hydrophobic acidic dye.
Solution Approach 2:
The glycol-based solvents and cyclic amide-based solvents serve as intermediary substances that prevent the hydrophobic acidic dye from aggregating and clogging the nozzle. These intermediaries maintain dye solubility and prevent flocculation during storage and ejection, thereby ensuring both fastness and ejection reliability.
3Adaptability or versatility
If an acidic dye having high hydrophobicity is used, then the color reproduction area is expanded, but flocculation occurs and storage stability reduces
Solution Approach 1:
The patent changes the chemical composition parameters by introducing a specific combination of glycol-based solvents and cyclic amide-based solvents in controlled proportions. This parameter modification prevents flocculation of the hydrophobic acidic dye, maintaining storage stability while preserving the expanded color reproduction area achieved by using dyes like C.I. Acid Blue 112 and C.I. Acid Blue 140.
Solution Approach 2:
The patent uses glycol-based solvents and cyclic amide-based solvents as intermediary substances that prevent direct interaction between hydrophobic dye molecules that would cause flocculation. These intermediaries maintain uniform dye distribution in the ink composition, ensuring both storage stability and expanded color reproduction capability.
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 effectively expands the color reproduction area, improves the fastness of recorded products, and prevents nozzle clogging, ensuring continuous and reliable ejection of the ink jet method.
Implementation Method 1
A glycol-based solvent and a cyclic amide-based solvent are contained as the water-soluble organic solvent... reduces flocculation and improves resolubility
Data Source
AI summary
An ink composition for ink jet textile printing according to the present disclosure contains a specific acidic dye being at least one selected from the group consisting of C.I. Acid Blue 112 and C.I. Acid Blue 140, a water-soluble organic solvent, and water. A glycol-based solvent and a cyclic amide-based solvent are contained as the water-soluble organic solvent. The cyclic amide-based solvent contains at least either ε-caprolactam or N-hydroxyethyl-2-pyrrolidone. The content of the glycol-based solvent is 10.0% by mass or more.