Thermal transfer method and system for fabrics and related fabrics and items
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Solution Overview
Problem
Nylon fabrics with terminal amino groups and without benzene rings face challenges in dyeing and printing processes, requiring extra steps for improved color fastness and distribution, and existing methods often result in poor washing resistance and limited color fastness.
Innovation Solution
A thermal transfer method using a small molecule modifier with carboxylic acid and naphthalene rings, which forms ionic bonds with amino groups on the fabric, allowing for effective dyeing with disperse dyes without affecting the fabric's hand feeling, and includes a system comprising benzoic acid, naphthoic acid, or specific compounds for pre-modification under acidic conditions followed by thermal pressure treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If extra processing steps are added to improve color fastness, then color distribution improves, but the process complexity and time increase
Solution Approach 1:
The patent merges the modification step and dyeing step into a more integrated process. The modifying solution is applied to the fabric, and then disperse dyes are applied in subsequent steps that utilize the modified fabric structure. This combination approach improves color distribution while being more efficient than multiple separate treatment steps
2Productivity
If conventional dyeing processes are used, then fabric can be dyed, but energy and water consumption are high
Solution Approach 1:
The patent changes the chemical parameters of the fabric surface by introducing carboxylic acid groups through the modifying solution. This parameter change allows the fabric to better accept disperse dyes under milder conditions, reducing the energy and water consumption typically required for conventional dyeing processes while improving dyeing efficiency
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 method achieves improved color fastness, washing resistance, and efficiency in the printing process with reduced energy and water consumption, and eliminates the need for acid or reactive dyes, resulting in brighter, more uniform colors and higher yields.
Implementation Method 1
the carboxylic acid groups in the molecular structure of the modifier are firmly combined with the amino groups in the fabric in the form of ionic bonds
Implementation Method 2
thermal pressure treatment
Data Source
AI summary
A thermal transfer method for fabrics is disclosed, comprising the following steps: 1) modifying a fabric with a modifier; 2) attaching a heat transfer paper having a pattern to a modified fabric, and then performing a thermal pressure treatment. The thermal transfer method for fabrics as disclosed herein has simple steps, low cost, and readily available raw materials of the modifier, and is suitable for large-scale production. The fabric prepared by the thermal transfer method has complete pattern, bright color, uniform coloring, good color fastness, washing resistance, soft material and a good feeling on the skin.