The aim of this diploma thesis was to investigate the influence of detergent type on the functional protective properties of textile laminates with an integrated water-repellent microporous membrane after repeated domestic laundering. The experi-mental part involved sequential washing of the samples for up to 20 cycles at 30 °C, using a conventional liquid detergent for coloured garments and a specialised deter-gent intended for the care of textile products with a microporous membrane. The morphological and chemical properties of the material were examined using scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR), while the functional properties were evaluated by determining water repellency, oil repellency, the sliding angle of a water droplet, and water vapour permeability. SEM analysis showed that repeated washing up to 20 consecutive cycles did not cause significant morphological damage or delamination of the laminated structure, regard-less of the detergent used. FTIR analysis confirmed the chemical stability of the out-er polyamide layer, while additional absorption bands were detected on the reverse side of the laminate, indicating the adsorption of detergent components, most likely siloxanes. Repeated laundering resulted in a gradual deterioration of the functional properties, the extent of which depended on the type of detergent used. While the specialised detergent enabled better preservation or partial restoration of water- and oil-repellent properties, a trend of faster and more pronounced reduction in water vapour permeability was observed compared with the conventional detergent, which stabilised after a higher number of washing cycles.
Based on the results obtained, it was concluded that the type of detergent has a sig-nificant influence on the balance between the protective and comfort-related proper-ties of microporous membrane textile laminates. The specialised detergent proved to be a more suitable choice in terms of maintaining protective water- and oil-repellent properties; however, it does not ensure better preservation of water vapour permea-bility, which should be taken into account when caring for garments with a mi-croporous membrane.
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