Polyurethane Coated Fabric Residual Solvent Determination Methods
Residual solvent determination in PU coated fabrics requires ISO 16189 liquid extraction GC-MS to catch bound DMFa that static headspace misses.
En 17131 Textile Standard
Chemical Verification
Analytical laboratories employ chromatographic procedures to identify and quantify specific synthetic fibers in blended apparel items. Implementing the en 17131 textile standard ensures that testing facilities use a unified liquid chromatography method to detect the presence of elastane and other polyurethane-based polymers in textiles. This testing is crucial for verifying composition claims on garment labels.
The method utilizes specialized extraction columns that isolate the polyurethanes from natural cotton or synthetic polyester matrixes. By standardizing this separation process, laboratories eliminate the risk of false positives that might arise from other chemical finishes applied to the fabric surface.
Method Application
Solvents dissolve the textile sample before injection into the chromatography system. Under the en 17131 textile standard, the resulting chromatograms are compared against reference samples to determine the exact polymer structure of the elastic fibers. This prevents manufacturers from mislabeling synthetic blends.
Commercial Enforcement
Brands use these certified lab reports to verify compliance with import regulations. Discrepancies between the declared fabric blend and the laboratory findings can lead to shipment delays or customs seizures. Third-party testing remains the standard procedure for international trade.
Measurement Accuracy
High-precision detection identifies even minute percentages of elastane within a fabric sample. This method provides reproducible results across different laboratory settings, making it a reliable legal reference for disputed shipments. Accurate fiber identification protects consumers and ensures fair trading practices across the supply chain.