Colored Synthetic-Fiber Yarns with Water-Soluble Spinning Additives
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Solution Overview
Problem
The dyeing of textiles and yarns results in significant environmental pollution due to high water consumption and chemical discharge, despite the use of dope-dyeing processes which aim to reduce this impact.
Innovation Solution
A method for producing colored yarns and fabrics using a self-elutable and water-soluble spinning additive that is washed out with water, reducing the need for detergents and simplifying wastewater treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional aqueous color solutions and auxiliary chemicals are used for dyeing, then the coloring process is effective, but large quantities of contaminated wastewater are produced requiring expensive cleaning
Solution Approach 1:
The patent changes the chemical parameters of the spinning additive by making it water-soluble and self-elutable, allowing it to be removed from the yarn through simple water washing without requiring detergents or complex wastewater treatment, thus reducing harmful factors while maintaining coloring effectiveness
Solution Approach 2:
The patent extracts the harmful chemical substances (colorants and auxiliary chemicals) from the wastewater stream by using a water-soluble spinning additive that can be easily washed out with water, separating the coloring function from the harmful chemical discharge
2Ease of operation
If conventional spinning additives are used in dope-dyeing, then fiber processing is facilitated, but environmental impact and chemical discharge remain high
Solution Approach 1:
The patent modifies the parameters of the spinning additive by selecting water-soluble compounds (such as carboxylic acids, esters, or amides) that can be easily removed from the environment, thus maintaining ease of spinning processing while significantly reducing environmental impact and chemical discharge
Solution Approach 2:
The patent uses water-soluble spinning additives that can be easily washed out and degraded in the environment, replacing conventional persistent chemical additives with temporary, biodegradable substances that fulfill their function during spinning and then disappear into the environment without harm
3Object-generated harmful factors
If water is used to wash out colorants and auxiliary chemicals, then cleaning is achieved, but high water demand increases operational costs
Solution Approach 1:
The patent changes the solubility parameter of the spinning additive to be water-soluble, allowing it to be removed from the yarn through efficient water washing, which reduces the total quantity of water needed compared to conventional methods that require multiple washing stages and detergent treatment
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
This approach significantly reduces environmental impact by minimizing wastewater contamination and water usage, enabling the reuse of treated water and lowering operational costs.
Implementation Method 1
the spinning additive is self-elutable and/or self-sluicing upon washing the yarn with an aqueous solution
Implementation Method 2
the spinning additive is water-soluble
Data Source
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AI summary
This invention relates to a method for producing a colored yarn based on synthetic fibers, wherein the method comprises the addition of a spinning additive. The spinning additive is self-elutable and/or self-sluicing upon washing the yarn and/or a fabric spun from the yarn with an aqueous solution and/or the spinning additive is water-soluble. The spinning additive can therefore be easily removed from the yarn and/or fabric produced of the yarn by washing with water.