Reactive Inkjet Ink Composition for High-Fixation Fabric Printing
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Solution Overview
Problem
Current reactive inkjet ink processes face challenges in optimizing dye fixation rate, water consumption, and product quality during fabric printing, requiring multiple washing steps and lengthy processing times.
Innovation Solution
An inkjet ink composition comprising 5%-15% reactive dye with bifunctional or trifunctional reactive groups, 15%-40% polyol, and auxiliary agents, allowing for high color fixation rates and reduced water consumption, enabling digital printing with fewer washing steps and improved storage stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional reactive inkjet ink is used, then fabric printing can be performed, but multiple washing steps (6-step washing) are required and water consumption is high
Solution Approach 1:
The patent modifies the chemical composition parameters of the ink by incorporating specific reactive dyes with multiple reactive groups (at least two reactive groups per dye molecule), adjusting the pH to 8.0-10.0, and optimizing the ratio of reactive dye to fabric. These parameter changes enable the ink to achieve high color fixation rates (90-95%) that eliminate the need for multiple washing steps, thereby reducing water consumption while maintaining reliable fabric printing
Solution Approach 2:
The invention uses composite ink formulations containing multiple components working together: reactive dyes with multiple reactive groups, carriers, pH adjusters, and auxiliary agents. This composite material approach creates an ink system where the synergistic interaction between components achieves superior color fixation without requiring extensive washing, thus resolving the contradiction between reliability and substance loss
2Manufacturing precision
If conventional reactive inkjet ink process is used, then fabric can be printed, but processing time is lengthy due to multiple washing steps
Solution Approach 1:
The patent incorporates pH adjusters and auxiliary agents in the ink formulation that pre-condition the fabric and dye interaction during the printing process itself. The ink is formulated to automatically optimize dye penetration and fixation conditions, eliminating the need for subsequent neutralization and extended washing steps. This preliminary action maintains high product quality while significantly reducing processing time
Solution Approach 2:
The invention extracts and eliminates unnecessary process steps from the conventional 6-step washing process. By formulating ink with high reactivity dyes and appropriate auxiliaries, the process removes the need for neutralization steps and reduces multiple washing cycles to a single or no-wash scenario, thereby reducing processing time while maintaining manufacturing precision through the optimized ink composition
3Ease of manufacture
If high-viscosity impermeable primer is used, then fabric printing can be performed, but material consumption increases and storage stability decreases
Solution Approach 1:
The patent changes the viscosity parameter of the ink formulation by selecting appropriate carriers and auxiliary agents that provide optimal flow characteristics without requiring high-viscosity primers. The ink is formulated to maintain stability during storage through proper pH control (8.0-10.0) and the use of stabilizing auxiliaries, eliminating the need for impermeable primers while maintaining printing capability and improving storage stability
4Productivity
If conventional ink formulation is used, then fabric printing can be performed, but dye fixation rate is insufficient (5-10% unfixed dye remains)
Solution Approach 1:
The patent fundamentally changes the chemical reactivity parameters by using reactive dyes with at least two reactive groups per molecule, adjusting pH to 8.0-10.0, and optimizing the dye-to-fabric ratio. These parameter changes increase the color fixation rate to 90-95%, dramatically reducing unfixed dye residue and improving both productivity and reducing substance loss
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 a color fixation rate of 90-95%, reducing unfixed dye to 5-10%, allowing for printing with minimal water washing and enhanced storage stability, thus streamlining the printing process and improving product quality.
Implementation Method 1
the reactive dye is selected from at least one of a dye with bifunctional reactive groups and a dye with trifunctional reactive groups
Data Source
AI summary
An inkjet ink, a method for preparing the same and use thereof are described. The inkjet ink includes the following components in mass percentage: 5%-15% of a reactive dye, 15%-40% of a polyol, 2%-35% of an auxiliary agent, and remaining amount of water, wherein the reactive dye is selected from at least one of a dye with bifunctional reactive groups and a dye with trifunctional reactive groups. The described reactive dye in the inkjet ink has high reactivity, can react with a fabric and firmly adhere to the fabric, with the color fixation rate as high as 90-95%, good color fastness, less unfixed dye, and good storage stability. The described inkjet ink only needs to be washed with cold water or warm water to remove a primer during post-processing, and the washing period is short, and it can meet the requirements of clothing use even without washing by water.