Colouring composition for the printing and/or dyeing of textiles, method for the printing and/or dyeing of textiles, and printed substrate
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Solution Overview
Problem
Existing textile dyeing processes are cumbersome, resource-intensive, and environmentally harmful, requiring multiple steps including steaming and washing, and often result in waste generation, while conventional inks face issues with nozzle plugging and fiber hardening.
Innovation Solution
A colouring composition comprising a crosslinking agent with protected isocyanate groups, an organic chromophore, and water, which forms covalent bonds with textile fibers through a single-step heat fixation process, eliminating the need for steaming and washing, and includes an antimigration agent to prevent dye migration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional dyeing processes are used, then coloration is achieved, but multiple steps (steaming, washing) are required and waste fluid is generated
Solution Approach 1:
The patent combines multiple dyeing steps (application, fixation, and washing) into a single-step process. The inkjet textile printing method applies dye directly to the fabric and uses heat activation to fix the dye in place, eliminating the need for separate steaming and washing steps that are required in conventional dyeing processes.
Solution Approach 2:
The invention extracts and eliminates the washing step from the conventional dyeing process. By using water-soluble dyes that can be directly fixed with heat, the process removes the need for water-intensive washing steps that are traditionally required to set the dye and remove excess material.
2Manufacturing precision
If dyes are applied to textiles, then coloration is achieved, but printing paste coating is required to prevent bleeding
Solution Approach 1:
The invention removes the printing paste coating step from the dyeing process. By using water-soluble dyes applied directly through inkjet technology with controlled deposition, the method achieves sharp color definition without requiring an additional printing paste layer to prevent bleeding.
3Reliability
If heat treatment is applied to fix dye, then permanent fixation is achieved, but energy consumption increases
Solution Approach 1:
The patent optimizes the heat treatment parameters to achieve effective dye fixation at lower temperatures and shorter durations. By using water-soluble dyes with appropriate molecular structures and controlling the heating process precisely, the method achieves permanent fixation with reduced energy input compared to conventional high-temperature steaming processes.
4Manufacturing precision
If washing steps are used to remove excess dye, then color purity is improved, but water consumption increases
Solution Approach 1:
The invention completely removes the water-intensive washing steps from the dyeing process. By using inkjet technology to apply precise amounts of water-soluble dye that are then heat-fixed to the fabric, the method achieves color purity without requiring large volumes of water for rinsing and washing.
5Manufacturing precision
If polymeric colorants are used, then coloration is achieved, but nozzle plugging occurs
Solution Approach 1:
The patent changes the physical and chemical parameters of the colorant from polymeric to water-soluble small molecules. This parameter change reduces the viscosity and molecular size of the dye, preventing nozzle plugging while maintaining effective color application through the inkjet process.
6Manufacturing precision
If dyes are applied to textiles, then coloration is achieved, but fiber hardening occurs
Solution Approach 1:
The patent changes the chemical parameters of the colorant system to use water-soluble dyes without polymeric binders or hardening agents. This parameter change allows the dye to penetrate and bind to fibers in a way that maintains fiber flexibility and softness, unlike conventional dyes that require polymeric carriers which can stiffen the fabric.
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 durable, long-lasting coloration with reduced water and energy consumption, minimal waste, and maintains textile softness, while being stable and environmentally friendly, suitable for various textile types.
Implementation Method 1
forms covalent bonds with textile fibers through a single-step heat fixation process
Implementation Method 2
forms covalent bonds with textile fibers through a single-step heat fixation process
Implementation Method 3
The colouring composition according to this disclosure reacts the colouring compositions in a single process step onto the textiles
Data Source
AI summary
This disclosure relates to a colouring composition for the printing and/or dyeing of textiles, a method for the printing and/or dyeing of textiles, and a printed substrate. The colouring compositions according to this disclosure are stable and provide for long-lasting products. The method for the printing and/or dyeing of textiles reacts the colouring compositions in a single process step onto the textiles and does not require any steaming and/or washing steps.