Banu Uygun Nergis

Comparison of the Effects of Cotton Yarns Produced by New, Modified and Conventional Spinning Systems on Yarn and Knitted Fabric Performance

This research, which is divided into two parts, is a comparative study of the physical properties of cotton yarns produced by using new, modified and conventional spinning methods. The first part focuses on the performance of yarns with a final count of Ne 20 produced by conventional and compact spinning methods, whereas the second part focuses on the performance of Ne 30 combed ring, compact and vortex cotton yarns. Effects of the tested properties of the yarns on the performance of fabrics knitted have also been studied. Results showed that the structural differences of each yarn type conferred different tensile, evenness and hairiness values, and the differences in the yarn structure were reflected onto the fabric properties.

A study of wicking properties of cotton-acrylic yarns and knitted fabrics

This paper investigated wicking properties of cotton-acrylic rotor yarns and knitted fabrics. The effect of yarn wicking on wicking of fabric in both wale and course directions was also discussed. One way ANOVA results of the experimental study suggested that wicking abilities of yarns and fabrics increased with the increase in acrylic content in the blends and with the use of coarse yarns. Besides, yarn wicking had a significant effect on fabric wicking.

Properties of Plain Knitted Fabrics from Chenille Yarns

In this experimental study, dimensional, physical, and visual properties of plain jersey knitted fabrics from chenille yarns are investigated as a function of component yarn count, pile length, laundering, and dry-cleaning. Based on the results, it is clear that the properties of component and pile yarns, together with laundering or dry-cleaning, affect the dimensional behavior of knits from chenille yarns. Dry-cleaned fabrics have the highest dimensional stability in general. Except for the dry relaxed fabrics, pile length has no significant effect on the abrasion resistance of dry-cleaned and laundered fabrics. The results also show that bursting strength mainly depends on the properties of the component yams, rather than the laundering and dry-cleaning processes, and that unlike knits from conventional yarns, the pilling tendency does not change in accordance with component and pile yarn properties and with laundering or dry-cleaning. Finally, it appears that surface properties such as softness, smoothness, and luster become much better as the component yarn count becomes finer and the pile length becomes longer. Tumble drying better satisfies the end-users expectations for knitted goods from chenille yarns with fine count component yarns and long piles.

Performance of Bouclé Yarns in Various Knitted Fabric Structures

This experimental study mainly focuses on the effects of overfeed ratio, twist direction and amount of twist of the binder yarn, and the effect of yarn count on the properties of bouclé yarns and their performance in single jersey and rib (1 × 1) structures. Based on the results, it is evident that the twist direction of the binding and the effect yarns as well as changes in the overfeed ratio influence the amount and height of the effect of the bouclé yarns. It was observed that changes in the studied parameters affect the thickness and the abrasion behaviour of both types of fabric. Furthermore, the weight loss due to abrasion on the actual face and back of both single jersey and rib fabrics is influenced by the type of effect and the yarn material employed. The actual face and back of single jersey fabrics are less resistant to abrasion than the rib structures.

Nanofiber-enhanced lightweight composite textiles for acoustic applications

This paper proposes lightweight textile acoustic structure, wherein electrospun polyacrylonitrile-based nanofibers enhance sound absorption properties with no weight and thickness penalty. Polyacrylonitrile nanofibers with diameter of 110 ± 7 nm were electrospun on spacer-knitted fabrics by varying deposition amount and surface coating arrangement. Proposed novel approach eliminated additional processing steps such as handling and post-lamination and provided easy scalability of nanofibers at macro-scale. The results showed that the sound absorption of nano-enhanced specimens was improved drastically when deposited amount of nanofibers or its effective surface area increased. Sound propagation paths in different configurations were interpreted from sound absorption and air permeability measurements. The sound absorption coefficient values up to 0.7 are achieved in the low and medium frequency ranges with no weight and thickness penalty by tuning deposition amount and surface coating arrangement.

Design of layered structure with nanofibrous resonant membrane for acoustic applications

Textiles such as wool felts are very commonly used materials for sound absorbing purposes on commercial white goods (e.g., washing machines, tumble dryers). In this study, it was aimed to discuss the limitations of wool felts for a domestic type washing machine. Accordingly, an alternative sound absorption material in a layered form was designed, in which a nonwoven covering together with nanofibrous resonant membrane and wool felt were used. The nanofibrous membrane in the structures was developed and its properties were discussed within the scope of the previous works of the authors. Therefore, this paper focused on the spunbond and meltblown nonwovens of various areal densities, which were employed as covering materials in the layered structures. The single and multilayered nonwovens were selected regarding three main criteria, namely acoustic performance, cost, and ease of production. The acoustic performance of the layered (combined) structures was measured in accordance with the relevant standards, and the results were comparatively discussed. In addition to that, Technique for Order Preference by Similarity to Ideal Solution together with Analytic Hierarchy Process was employed not only to determine the best performed nonwoven as a covering layer, but also to find out the optimized solution among the combined (layered) structures developed, so far as the acoustic behavior was concerned.

Design of a light weight fabric from natural cellulosic fibers with improved moisture related properties

This paper investigated moisture related comfort properties of woven fabrics from natural cellulosic fibers, namely cotton, linen, and Crailar. The comfort properties of the fabrics were measured in accordance with the relevant standards, and the results were comparatively discussed. In addition to that, Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) together with Analytic Hierarchy Process (AHP) was employed to determine the most preferable fabric based on comfort properties.