Disperse Dye Mixtures for Light-Fast Polyester Fiber Dyeing
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Solution Overview
Problem
Polyester-based fibers, especially fine denier fibers, and mixed fibers of different thicknesses face challenges in maintaining color fastness and reproducibility when dyed with existing disperse dyes, particularly in automobile interior furnishings exposed to high temperatures and sunlight.
Innovation Solution
A specific combination of blue, yellow, and red dye mixtures, comprising particular structural formula-based pigments in defined proportions, is used to achieve excellent light fastness and color matching, suitable for dyeing polyester-based fibers and mixed fibers with cationic dyes, ensuring consistent color reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If disperse dyes are used for dyeing polyester-based fibers to achieve good coloration, then the fibers can be dyed with appropriate color, but the light fastness deteriorates especially on fine denier fibers
Solution Approach 1:
The invention divides the single dye approach into multiple dye components. Specifically, it uses a combination of at least two different disperse dyes (yellow and cyan dyes, or yellow, cyan, and magenta dyes) to achieve the desired color. This segmentation allows each dye component to contribute to both coloration and light fastness, resolving the contradiction between good coloration and maintained light fastness on fine denier polyester fibers.
2Ease of manufacture
If existing disperse dyes are used on fine denier polyester fibers, then dyeing can be performed, but the light fastness is worse compared to regular polyester fibers
Solution Approach 1:
The invention creates a composite dye system by combining multiple disperse dyes with different spectral characteristics and fastness properties. The specific combination of yellow disperse dyes (such as C.I. Disperse Yellow 113, 115, 118, 121, or 123) with cyan disperse dyes (such as C.I. Disperse Cyan 79, 81, 83, 85, 87, or 89) produces a synergistic effect where the composite dye mixture maintains excellent light fastness on fine denier polyester fibers, overcoming the limitations of individual dyes.
3Reliability
If dyes are selected for good light fastness, then light fastness is improved, but color reproduction consistency on mixed fibers of different thickness deteriorates
Solution Approach 1:
The invention develops a universal dye mixture formulation that performs consistently across different polyester fiber types and deniers. The multi-component dye system (combining yellow, cyan, and/or magenta disperse dyes) is designed to provide both excellent light fastness and uniform color reproduction on various polyester substrates including fine denier fibers, regular polyester fibers, and mixed fibers of different thickness. This multi-functional dye composition resolves the contradiction between maintaining light fastness and achieving dyeing uniformity across diverse fiber types.
Data Source
AI summary
The present invention provides a blue dye mixture which contains the pigments represented by formulae [1], [2], [3], and [4]The present invention also relates to dye mixtures in which there are compounded therewith a yellow dye mixture and/or a red dye mixture. The invention further relates to a method of dyeing polyester-based fibers and dyed polyester-based fibers and dyed polyester-based fiber materials.