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.
Polyurethane Fabric Testing
Material Durability
Coated fabrics used in apparel, footwear, and upholstery must undergo rigorous mechanical tests to evaluate their performance over time. Standard polyurethane fabric testing measures the material’s resistance to flexing, abrasion, and peel strength to ensure the synthetic layer does not crack or separate from the base fabric. This quality check is essential for predicting the service life of coated textiles.
Testing protocols include exposure to cyclic flexing on a Bally flexometer, which mimics the natural creases that develop during walking or sitting. This stress test reveals early material fatigue or adhesion failures.
Abrasion Resistance
Synthetic coatings are subjected to repetitive rubbing under a specified load using standard abrasive materials. During polyurethane fabric testing, the number of cycles required to cause visible wear or expose the backing fabric is recorded. High-grade synthetic leathers must withstand tens of thousands of cycles before showing damage.
Adhesion Strength
The test also measures the force required to peel the polyurethane film away from the woven or knitted backing. Low adhesion strength leads to localized delamination, which ruins the appearance and water resistance of the garment. This test is critical for qualifying new adhesive formulations.
Environmental Aging
Samples are exposed to elevated temperatures and humidity to simulate long-term storage and use. This exposure tests the hydrolysis resistance of the polyurethane polymer, which can break down over time if the material is of poor quality. Measuring these properties helps manufacturers select the right raw materials for different environments.