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    A Comperative Study on the Performance of Side-by-side Hollow Bicomponent Yarns
    (E.U. Printing and Publishing House, 2024) Bulut, Merve; Ozturk, Merve Kucukali; Candan, Cevza; Nergis, Banu; Zengin, Tugba; Yenice, Aysun; Tor, Ecenur
    Using hollow yarns can change and improve many qualities of fabrics including thermal, acoustic, or mechanical properties. Using technical yarns in commercial textile products has been studied extensively to bring them some sort of functionality. In this study, side-by-side 50%/50% bicomponent yarns made from different raw materials were tested and evaluated to determine their processing behaviour and performance characteristics. All yarns have co-polyester (coPET) as one component where the other component is Polyester (PET), recycled PET (rPET) and Polyamide (PA6), respectively. Afterwards, the coPET component is dissolved from all yarns by alkalization, thus making the hollow yarns, and the samples were textured by heat treatment. The mechanical and physical properties were evaluated by various tests, including unevenness, crimp testing, hollow ratio, and shear test. Their thermal and thermomechanical properties were evaluated with Differential Scanning Calorimeter (DSC) analysis and Thermal Gravimetric Analysis (TGA). Also, X-ray Diffraction Analysis (XRD) analysis was carried out in order to observe the crystalline behaviour of the samples. All evaluations were done on the non-textured and textured state of the yarns to see the effect of the heat treatment. The physical and mechanical test results revealed that despite the alkalization, the textured yarns demonstrated better strength and dimensional resistance. DSC and TGA analysis showed that the alkalization and heat treatment caused an increase in the polymer mobilization, which resulted in an increase in the decomposition enthalpy and a lower decomposition temperature. As a final note, XRD results indicated that for the PET/coPET and rPET/coPET samples, the texturization process significantly increased the crystallinity of the samples, which unexpected and therefore needs further investigation.
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    The fabric of employee well-being: a conservation of resources approach to decent work conditions in the Turkish garment industry
    (Emerald Group Publishing Ltd, 2025) Yucel, Yelda; Soydemir, Cemil Ozan; Candan, Cevza; Nergis, Banu
    PurposeBased on a decent work scale (DWS) derived from the decent work literature and tailored to the Turkish garment industry, we propose a multidimensional model showing the differentiated impacts of decent work dimensions on various facets of employee well-being.Design/methodology/approachUsing our customized DWS formulated from discussions with industry experts and academics, the European Working Conditions Survey (2015) and Ferraro et al.'s DWS (2018b), we employ a cross-sectional analysis using surveys of 332 white-collar employees in 6 garment firms across T & uuml;rkiye. We conduct an exploratory factor analysis to identify the DWS structure and a confirmatory factor analysis to validate our model. Finally, we apply a PROCESS analysis to examine direct and indirect effects, assessing relationships among the variables.FindingsWe find white-collar employees in T & uuml;rkiye emphasize earnings and equity as critical resources that enhance all aspects of well-being, while workplace safety, work-family balance and work intensity have more limited effects. The analysis also reveals that physical well-being serves as a mediator between most dimensions of decent work conditions in fostering personal well-being.Originality/valueOur DWS measures decent work conditions specifically for the garment industry based on a unique participatory survey that adds a novel element to survey development. Utilizing conservation of resources theory, our model analyzes the relationships between decent work and employee well-being. By recognizing decent work conditions as valuable resources for well-being, the study offers insights for decision-makers in the garment sector, showing that changes in these resources influence various aspects of well-being that ultimately affect firm productivity and sustainability.