Colored synthetic fiber
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Synthetic polyester fibers are difficult to dye due to their crystalline nature, which limits dye penetration and migration, resulting in unsatisfactory coloring, and the use of coloring compounds during synthesis can alter physical properties and require additional cleaning processes.
Innovation Solution
A process involving a semicrystalline thermoplastic polyester comprising 1,4:3,6-dianhydrohexitol, aliphatic diol, and aromatic dicarboxylic acid units, with a specific molar ratio and reduced viscosity, is used to create synthetic fibers that are dyed with an aqueous disperse dye solution, improving dye affinity and maintaining wash fastness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If synthetic polyester fibers are dyed using conventional methods, then the fibers maintain their physical properties, but the coloring quality is unsatisfactory due to limited dye penetration and migration
Solution Approach 1:
The patent modifies the chemical composition parameters of the polyester by incorporating specific amounts of isosorbide units (1-20 mol%) and ethylene glycol units (2-5 mol%) into the polymer structure. This compositional parameter change creates a polyester with improved dye affinity while maintaining the desired physical properties, resolving the contradiction between coloring quality and ease of manufacture
Solution Approach 2:
The patent creates a composite polyester material combining multiple components: isosorbide-derived diol units, ethylene glycol-derived diol units, and dicarboxylic acid units in specific proportions. This composite structure provides both the crystalline nature for physical property stability and the modified chemistry for improved dye penetration and coloring quality
2Object-affected harmful factors
If coloring compounds are added during polyester synthesis, then yellowing is compensated, but the physical properties of the polyester are altered and additional cleaning operations are required
Solution Approach 1:
The patent extracts the coloring function from the synthesis stage by removing the need for coloring compounds during polymerization. Instead, the polyester is synthesized with modified chemical composition (specific diol and dicarboxylic acid units) that inherently provides improved dye affinity during subsequent dyeing, eliminating yellowing compensation additives and their associated cleaning requirements
Solution Approach 2:
The patent performs preliminary modification of the polyester chemical structure during synthesis by incorporating specific monomer units in controlled amounts. This preliminary compositional adjustment enables the fiber to accept dyes more effectively during the dyeing process, preventing yellowing issues before they occur rather than compensating for them later
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 process achieves high-quality, uniform coloring with improved dye affinity and wash fastness, allowing for diverse and varied color options without altering the physical properties of the fibers.
Implementation Method 1
dyeing said synthetic fiber with an aqueous solution of at least one disperse dye
Implementation Method 2
the penetration and migration of the dyes within the fibers
Data Source
AI summary
The present invention relates to the field of polymers, in particular that of polyester fibers, and relates more specifically to a process for manufacturing a colored synthetic fiber, and to the uses thereof. More particularly, the present invention relates to a process for manufacturing a colored synthetic fiber from a semicrystalline thermoplastic polyester based on isosorbide, said fiber being colored by means of an aqueous solution of at least one disperse dye. The present invention also relates to a fiber colored by a disperse dye and also to the use thereof in the field of furnishings, textiles or sporting goods. The process according to the invention makes it possible to obtain colored synthetic fibers having improved quality and improved stability of the dyeing.