Disperse Dye Black Ink Composition for Light-Fast Polyester Printing
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Solution Overview
Problem
Inkjet printing on fabrics, particularly polyester, faces challenges with black color fading and shade changes due to light exposure, as existing dyes lack sufficient light-fastness, impacting the quality and durability of printed artifacts.
Innovation Solution
A black ink formulation comprising a mixture of disperse dyes such as disperse blue 165, disperse red 82, disperse orange 29, and disperse blue 60, dispersed in an aqueous vehicle, which provides intense color strength and high light-fastness, suitable for inkjet printing on polyester fabrics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional dyes are used in inkjet printing on polyester fabrics, then the printing process is simple and cost-effective, but the black color fades and changes shade when exposed to light
Solution Approach 1:
The patent applies composite materials by formulating a black ink that contains a specific mixture of multiple disperse dyes (disperse blue 165, disperse red 82, disperse orange 29, and disperse blue 60) in defined proportions. This composite dye system provides superior light-fastness and color stability compared to conventional single dyes, while maintaining compatibility with inkjet printing processes on polyester fabrics.
Solution Approach 2:
The patent applies parameter changes by optimizing the specific proportions of each disperse dye in the mixture (e.g., disperse blue 165 at 65-80 parts, disperse red 82 at 10-20 parts, disperse orange 29 at 5-15 parts, and disperse blue 60 at 5-15 parts). These precise parameter adjustments enable the ink formulation to achieve both high light-fastness and proper color characteristics.
2Reliability
If existing black inks are used, then the formulation is simple, but the color intensity and light resistance are insufficient
Solution Approach 1:
The invention uses a composite material approach by combining four specific disperse dyes in optimized ratios. This composite dye system delivers enhanced resistance to light degradation and superior color intensity, overcoming the limitations of conventional single-dye or simple mixture formulations.
Solution Approach 2:
The patent optimizes the quantity and proportion of each dye component to achieve the desired performance. By carefully controlling the parts ratio of disperse blue 165, disperse red 82, disperse orange 29, and disperse blue 60, the formulation achieves maximum color intensity and light resistance with an optimal number of components.
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 set maintains color intensity and resistance to light degradation, ensuring a higher quality and longer-lasting print with improved light-fastness, as demonstrated by the CIE L*a*b* color model and EN ISO 105 B02 standard, offering a significant increase in resistance to light exposure compared to conventional inks.
Implementation Method 1
A black ink formulation comprising a mixture of disperse dyes such as disperse blue 165, disperse red 82, disperse orange 29, and disperse blue 60, dispersed in an aqueous vehicle
Implementation Method 2
the energy of the incident radiations causes more or less intense changes of the colors since the dye molecules, by absorbing part of the radiation energy, switch to an excited state, which can induce chemical reactions; this results in degradation of the color
Data Source
AI summary
The invention refers to a disperse black ink comprising: an aqueous vehicle and a black dye dispersion comprising: disperse blue 165, disperse orange 29, disperse red 82 and disperse blue 60, and the use of such black ink in a method for inkjet-printing on a fabric.