| Abstract [eng] |
The purpose of master thesis is to analyse the impact of washing and dry-cleaning processes cycles on the quality of laser cut fabric edge and on the properties of garment when laser power is changed. In the recent years, a wide use of laser technologies has been noted in the textile industry. Laser can be used for the textile cutting, engraving and ornamental embossing as decoration. Laser technologies are used not only in demonstration collections, but also in mass production, therefore, there is a relevant problem: how to improve the properties of laser-finished products. In order to improve the performance, it is important to properly select the laser parameters in terms of garment wear, laundry and dry cleaning frequency. According to the literature analysis, three fabrics of the same composition (100% polyester), but different in thickness, density and weave, were selected for the research. By changing the CO2laser power (15 W, 35 W, 60 W), different directions rectangular and circular specimens were cut from these fabrics. Chemical treatment of samples in accordance with the standard ISO 8229:1991 and washing in accordance with standard ISO 6330 were carried out. The FAST methodology was used to determine bending stiffness B of the fabric.Fabric tensile properties were measured according to standard LST EN ISO 13934-1:2013 – an experiment was conducted with samples before and after exploitation, the maximum tensile force F, elongation at maximum force, and the initial modulus of the elasticity were determined. Mechanical parameters were fixed with the optical microscope Infinity 5,0 Lumenera Corporation, set before and after simulating the operation of washing and cleaning tests.Research was completed with visual evaluation of the edge, comparing the samples before and after exploitation. Results of research were summarized, conclusions and recommendations were prepared. It was proved that the changeable laser power has impact on the quality of the cut edge of the fabric, and properties of the laser-cut element. |
