Ink jet textile printing composition set and ink jet textile printing method
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Solution Overview
Problem
Ink jet textile printing methods using fluorescent dyes face issues with concentration quenching, where fluorescence intensity decreases due to high dye concentrations, leading to inadequate color reproducibility and fluorescence intensity differences between fabric surfaces.
Innovation Solution
The use of an ink jet textile printing composition set comprising a fluorescent dye and a penetrant with a lactam structure, which promotes even dye penetration and reduces fluorescence quenching, ensuring consistent fluorescence intensity across fabric surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high dye concentration is used to improve color reproducibility, then color saturation is improved, but concentration quenching occurs causing fluorescence intensity to decrease
Solution Approach 1:
The penetrant acts as an intermediary substance between the fluorescent dye and the fabric. It facilitates uniform dye distribution and penetration into the fabric structure, preventing dye molecules from clustering together. This mediator role allows the system to achieve good color reproducibility without the harmful concentration quenching effect that occurs when dye molecules are too close to each other.
Solution Approach 2:
The invention changes the physical and chemical parameters of the dyeing system by introducing a penetrant with specific properties (lactam structure, hydrophilicity). This parameter change affects how the dye distributes itself in the fabric, enabling lower effective dye concentrations to achieve the same color intensity without quenching, thus maintaining fluorescence intensity while improving color reproducibility.
2Reliability
If high dye concentration is used to enhance color developability, then color saturation is improved, but fluorescence intensity decreases due to concentration quenching
Solution Approach 1:
The penetrant serves as a mediator that decouples the relationship between dye concentration and fluorescence intensity. By controlling dye distribution through the penetrant, the system achieves reliable color reproduction without requiring high dye concentrations that would cause quenching, thus maintaining both color reproducibility and fluorescence intensity.
Solution Approach 2:
The penetrant creates local quality differences in the fabric structure by facilitating selective penetration and uniform distribution of dye molecules. This local control over dye positioning prevents the formation of high-concentration clusters that cause quenching, while still achieving sufficient color saturation for good reproducibility.
3Area of stationary object
If fluorescent dye is applied to fabric surface, then color coverage is achieved, but fluorescence intensity differs between fabric surfaces
Solution Approach 1:
The penetrant acts as a mediator that transports the fluorescent dye uniformly throughout the fabric structure, not just on the surface. This intermediate transport mechanism ensures that dye is distributed evenly across different regions and depths of the fabric, resulting in uniform fluorescence intensity across the entire fabric surface area.
Solution Approach 2:
The penetrant enables the dye distribution to extend from a two-dimensional surface application into the third dimension of fabric depth. By facilitating penetration into the fabric bulk, the system achieves uniform fluorescence throughout the fabric volume, which translates to uniform surface fluorescence intensity across the entire fabric area.
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 suppresses concentration quenching, enhances fluorescence intensity on both fabric surfaces, and maintains color developability, improving the overall printing quality and reproducibility.
Implementation Method 1
concentration quenching may arise. This is a phenomenon in which the fluorescence generated from dye molecules is absorbed by other, neighbouring, dye molecules, so that the fluorescence intensity decreases
Data Source
Figure 1
AI summary
An ink jet textile printing composition set of the invention includes an ink jet textile printing ink composition and a penetrant. The ink jet textile printing ink composition contains a fluorescent dye and water, and the penetrant contains a compound having a lactam structure and water.