Treatment solution composition for ink jet textile printing, ink set, and recording method
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Solution Overview
Problem
Ink jet textile printing methods using reactive dyes often result in color differences (band unevenness) between passes, affecting the image quality of recorded matters due to uneven ink permeation and bleeding.
Innovation Solution
A treatment solution composition containing a glycol solvent with a molecular weight of 100 or less, a sugar with a molecular weight of 400 or less, an alkaline agent, and optional thickening agents, ureas, and reduction inhibitors is applied to control ink permeability and fixability, reducing color differences and bleeding between passes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional ink jet textile printing methods are used, then the device complexity is low and operation is simple, but color difference (band unevenness) occurs between passes due to uneven ink permeation
Solution Approach 1:
The patent applies a pretreatment solution to the fabric before ink jet printing to prepare the fabric surface in advance. This preliminary action modifies the fabric properties to ensure uniform ink permeation during subsequent printing passes, eliminating band unevenness without requiring complex printing process adjustments
Solution Approach 2:
The patent changes the chemical parameters of the treatment solution by selecting specific compounds (carboxylic acid or carboxylic acid ester with defined molecular weights and acid values) to control ink permeation characteristics. This parameter optimization ensures consistent color reproduction across passes while maintaining simple printing equipment
2Manufacturing precision
If reactive dye is used for ink jet textile printing, then coloring properties are enhanced, but color difference occurs between passes due to differences in fixing conditions or storage conditions
Solution Approach 1:
The pretreatment solution is applied to the fabric before printing to pre-condition the fabric surface. This preliminary action creates a controlled environment that reduces the fabric's sensitivity to subsequent variations in fixing conditions or storage conditions, ensuring consistent color results with reactive dyes
Solution Approach 2:
The carboxylic acid or carboxylic acid ester in the treatment solution acts as an intermediary between the fabric and the reactive dye. This intermediary substance modifies the fabric surface properties to provide more stable and consistent dye fixation, reducing sensitivity to processing condition variations
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 composition enhances coloring properties, reduces uneven permeation and bleeding, and improves the reproducibility of image quality by maintaining consistent color across overlap and non-overlap regions between passes.
Implementation Method 1
the permeability of an ink composition is controlled
Implementation Method 2
an ink jet textile printing method in which at least one of an aqueous pretreatment agent and an aqueous ink jet textile printing ink contains a reduction inhibitor
Data Source
AI summary
A treatment solution composition for ink jet textile printing contains one or more selected from the group consisting of a glycol solvent with a molecular weight of 100 or less and a sugar with a molecular weight of 400 or less, water, and an alkaline agent.