Elastane Removal from Textiles via Thermal and Chemical Treatment
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Solution Overview
Problem
Existing methods for recycling textiles containing elastane are inefficient, as they fail to effectively remove elastane without damaging the primary textile materials, limiting the repurposing of these materials in new applications.
Innovation Solution
A method involving material preparation, where textiles are sorted and treated with specific oil blends and heat processes to break down elastane into a resin stage, followed by chemical extraction using surfactants and enzymes, allowing for the efficient removal of elastane without damaging the primary fibers, and subsequent processing to convert the materials for reuse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing recycling methods are used to remove elastane from textiles, then elastane removal is achieved, but the primary textile materials are damaged and recycling efficiency is limited
Solution Approach 1:
The patent applies parameter changes by controlling temperature (80-200°C), time (5-60 minutes), and chemical concentration ratios to optimize elastane breakdown while preserving textile fibers. The chemical solution composition parameters (surfactant-to-enzyme ratios, pH levels) are adjusted to achieve selective degradation of elastane without damaging primary materials, thereby resolving the contradiction between reliable material preservation and efficient recycling processing
2Productivity
If harsh chemical methods are used to remove elastane, then removal efficiency is improved, but damage to primary textile materials increases
Solution Approach 1:
The patent uses an intermediary chemical solution system containing surfactants and enzymes that mediates between the elastane and the processing system. This intermediary formulation selectively targets elastane through enzymatic breakdown while the surfactant component protects primary textile fibers from chemical damage, enabling efficient removal without harmful effects on the primary materials
Solution Approach 2:
The patent employs parameter changes by optimizing chemical solution composition (surfactant-to-enzyme ratios, pH levels, temperature ranges) to achieve selective elastane degradation. By adjusting these parameters, the system maintains high removal efficiency while minimizing harmful effects on primary textile materials through controlled chemical activity
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 enables the effective removal of elastane from textiles, preserving the integrity of the primary materials, thus enabling their repurposing in various textile applications, reducing waste, and enhancing recycling efficiency.
Implementation Method 1
textiles are sorted and treated with specific oil blends and heat processes to break down elastane into a resin stage
Implementation Method 2
chemical extraction using surfactants and enzymes
Implementation Method 3
chemical extraction using surfactants and enzymes
Data Source
AI summary
A method of elastane removal from textiles that includes collecting textiles from sources, transporting the textiles to a collection facility, sorting, baling, and staging the materials, and then treating the materials with heat and chemicals to remove elastane from the textiles.