Method for dyeing artificial fibers
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Solution Overview
Problem
Conventional dyeing methods for artificial fibers require high energy, result in poor dyeability, long dyeing times, and generate significant environmental pollution due to high water and chemical consumption, leading to inefficient color production and adverse environmental impact.
Innovation Solution
A method involving a preparation, mix, dye, press, and dry process using a dyestuff with a chromophore and crosslinking agent at room temperature, with a pressing member to adjust immersion depth, allowing for rapid dyeing (less than 5 seconds) and reduced water usage, achieving high color fastness and efficient production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high temperature and high pressure are used for dyeing artificial fibers, then dyeability is improved, but energy consumption increases
Solution Approach 1:
The invention changes the chemical parameters of the dyeing system by introducing a crosslinking agent that reacts with hydroxyl groups on the fiber surface. This chemical modification enables dyeing at room temperature without requiring high temperature and pressure, thus resolving the contradiction between improved dyeability and reduced energy consumption
Solution Approach 2:
The crosslinking agent acts as an intermediary substance that facilitates the bonding between dye and fiber. By introducing this intermediate chemical agent, the dyeing process can proceed at low temperature through chemical crosslinking rather than relying on thermal energy, thereby maintaining dyeability while reducing energy consumption
2Reliability
If conventional dyeing methods are used for artificial fibers, then color fastness is achieved, but water and chemical consumption increases
Solution Approach 1:
The invention extracts and eliminates the need for extensive washing and soaping steps from the conventional dyeing process. By using a crosslinking agent that creates strong chemical bonds between dye and fiber, the process achieves color fastness without requiring large amounts of water for post-dyeing treatment, thus reducing substance loss
Solution Approach 2:
The crosslinking agent enables the dyeing system to be self-sufficient by creating durable bonds that do not require additional chemical treatments or extensive washing. The chemical crosslinking itself provides the color fastness, eliminating the need for separate fixing and washing stages that consume water and chemicals
3Productivity
If high temperature heat treatment is applied to polyester substrate, then dyeing time is shortened, but energy consumption increases
Solution Approach 1:
The invention changes the temperature parameter from high temperature (100-180°C) to room temperature by introducing chemical crosslinking. The crosslinking agent enables rapid dye penetration and bonding at low temperature, achieving short dyeing time without the energy-intensive heat treatment step
4Adaptability or versatility
If conventional dyeing process is used, then color requirements are met, but environmental pollution increases
Solution Approach 1:
The invention changes the process parameters from high temperature, high pressure, and extensive water use to room temperature, low liquor ratio, and minimal washing. This parameter optimization maintains color quality while dramatically reducing environmental pollution from wastewater and energy consumption
Solution Approach 2:
The invention discards the conventional multi-step process including extensive washing and soaping that generates pollution. By using chemical crosslinking to achieve color fastness, the process eliminates the need for polluting post-treatment steps, thereby reducing environmental harm while maintaining color versatility
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 method reduces energy consumption, shortens dyeing time, improves dyeing efficiency, and minimizes environmental impact by using biodegradable dyestuffs, achieving high color fastness and sustainable production with reduced wastewater generation.
Implementation Method 1
a crosslinking agent... wherein the roller set has two rollers oppositely disposed... immerse the artificial fiber in the tank to obtain a dyed artificial fiber
Implementation Method 2
the press step is performed to press the dyed artificial fiber by a roller set, wherein the roller set has two rollers oppositely disposed
Implementation Method 3
the dry step is performed to dry out the dyed artificial fiber
Data Source
AI summary
A method for dyeing artificial fibers comprises preparing an artificial fiber, and adding a dyestuff, a crosslinking agent, and an appropriate amount of water into a tank for mixture. Then, the artificial fiber is immersed in the tank to obtain a dyed artificial fiber, and the dyed artificial fiber is pressed by a roller set. Finally, the dyed artificial fiber is dried out.