Dusan Trajkovic

• University of Nis

Socks are an essential item of everyday clothing, and therefore, it is crucial that they are comfortable, long-lasting and affordable. In the study, five different cotton type socks were analyzed based on their raw material composition and structure. Samples of right-left knitted fabrics from the foot, heel and toes were used (on which the basic ch...

Socks are included in the group of everyday (indispensable) items of clothing. They should absolutely be comfortable, long-lasting and affordable. In this research were analyzed three types of socks that differ in raw material composition (mixture of Co, PA and Lycra fibers) and structure (loop density). All socks are made of knitwear in right-left...

The research is focused on determining the influence of structural and constructional parameters of rib knitted fabrics on the thermal properties of men's socks. Men's socks are made in three different pattern constructions of three types of basic yarns: bamboo, cotton and a cotton/polyester blend with the additional filament polyamide yarn and wra...

The influence of environmental conditions on the thermo-physiological comfort of men's socks was investigated using an objective assessment of comfort under dynamic conditions. Men's socks made in a 3:1 rib construction from three types of basic yarns (77%) were used: bamboo, cotton, and a cotton/polyester blend. The remaining composition of the so...

The research is focused on checking the most important physiological properties of short men's socks depending on the raw material composition. Men's socks are mostly made of bamboo, cotton or a cotton/polyester blend, the composition includes filament polyamide yarn as well as wrapped rubber thread. The stitch design is rib construction with a dif...

In the process of texturing, smooth filaments are formed into crimpy yarns. By combining thermal and mechanical action, thermoplastic fibres acquire a permanent wavy shape. Since textured multifilament yarns, formed from POY PES filaments, produced on machines with high-temperature heaters, are insufficiently studied, this paper analyses the deform...

Compression properties of textile materials are useful for determining fullness, softness, smoothness, and stiffness. In addition, compression parameters have significant influence on fabric hand value and quality of textile materials. The present paper reports a study of the sublimation printing process influence on the change in compression prope...

The influence of sublimation transfer printing on alteration of the structural and physical properties of knitted fabrics was investigated in this research study. Seven different knitted fabrics, which differed in terms of structure and raw material composition (polyester, cotton and cotton/polyester), were printed using the sublimation transfer te...

In this paper, the influence of the fluorescent bleaching agent, UVITEX BHT optical bleach, on the degree of whiteness of cotton fabric was examined. In the first phase of the test, the bleaching of cotton with hydrogen peroxide, as the bleaching agent, was done. In the second phase, the effect of fluorescent bleaching agent on the whiteness of cot...

An analysis of the mechanical properties of textured PES yarns shows that the texturing speed has a significant effect on these properties. The results showed that with the increase in the texturing speed, a decreasing trend was observed in the breaking forces of the analyzed textured PES yarns at stretching degrees of 1.665 and 1.685. Some deviati...

The paper reports the results of the analysis of mechanical properties of nonwoven geotextile material from recycled polyester fibres of areal density 150, 200, 250, 300 and 500 g/m². Also, the limits to yield point of needled geotextile materials, which define the permissible loads of geotextiles, are determined. Using mechanical models (model of...

An analysis of the mechanical properties of textured PES yarns shows that the texturing speed has a significant effect on these properties. The results showed that with the increase in the texturing speed, a decreasing trend was observed in the breaking forces of the analyzed textured PES yarns at stretching degrees of 1.665 and 1.685. Some deviati...

In this paper, the effect of technical and technological parameters in false twist texturing on physical-mechanical properties of polyamide yams was studied. Partially oriented (POY) multifilament with fineness of 22f07x1 dtex was textured under factory conditions on a friction texturing ICBT model FT 15 E3 machine. Using low temperature long heate...

In the false twist texturing process, due to the action of mechanical forces and heat, a disorientation of structural elements happens at all levels of the supramolecular structure. These changes are related to changes in the texturing parameters and mechanical properties of yarn. In this paper, investigated is the effect of technical-technological...

In the false twist texturing process, due to the action of mechanical forces and heat, a disorientation of structural elements happens at all levels of the supramolecular structure. These changes are related to changes in the texturing parameters and mechanical properties of yarn. In this paper, investigated is the effect of technical-technological...

Polyester waste is the dominant component of the clothing industry waste stream, yet its recycling in this industry is rarely addressed. This paper proposes using polyester cutting waste as an insulation blanket for roofing and buildings’ internal walls in order to reduce environmental pollution. The designed textile structures used waste cuttings...

By its origin, textile waste can be divided in two broad categories: post-consumer waste and post-industrial waste generated during the manufacturing process. The division of the clothing supply chain between developed consumer markets and developing countries where apparel production capacities are outsourced implies that post-consumer waste is pr...

In this paper, the effect of false-twist texturing parameters (texturing speed, heater temperature, draw ratio and disc-to-yarn speed ratio (D/Y ratio)) on the structure and crimp properties of polyester yarn has been studied using a high temperature heater and high texturing speeds. Textured yarn was analyzed and characterized in terms of the degr...

Predicting the behavior of geotextiles made of polyesters and polypropylene fibers is described by differential equations derived from mechanical models. Thereby, we describe the behavior of geotextiles up to the elastic limit. The elastic limit represents the permissible load which the geotextile material may be subjected to during exploitation, a...

Mechanical properties of needled nonwoven geotextile materials depend on their structural solutions, as well as on the technological conditions in the production. Thereby, structural and physical-mechanical properties of fibers, surface mass of geotextiles and the needling process parameters have the most important function. The paper presents the...

Effective utilisation of textile waste requires an accurate prediction of the quality of waste generated. Textile waste in Macedonia mainly consists of apparel cuttings. The aim of this research was to characterize the apparel cuttings waste, define the current state of apparel waste management and the potential barriers against introducing efficie...

Thermal insulation materials provide thermal energy savings. Classic insulation materials (stone wool and polystyrene) dominate the European market, but researchers' efforts are aimed towards improving their efficiency and developing new insulation materials. They are evaluated according to their physical properties, effect on people and the enviro...

Mechanical characteristics of nonwoven geotextile materials depend on their structural and constructional solutions, as well as technological development conditions. In addition, a very important role have the structural and physical-mechanical properties of the fiber, mass per unit area of geotextile and density of needle punching in the productio...

Theoretically 97% of textile waste can be recycled, which would make the textile industry a waste-free process. Still, in reality, the process of textile recycling is faced with numerous challenges. The most important challenges are waste availability, consistency of the waste supply and the current market and demand for recycled materials. Bearing...

Stvaranje tekstilnog otpada je direktno zavisno od masovnosti proizvodnje tekstila. Veća proizvodnja znači više otpada. Iz Makedonije se izvozi mesečno oko 1.400.000 komada odeće, koji za sobom ostavljaju velike količine krojnog otpada u odnosu na veličinu i broj stanovnika u zemlji. Ova analiza je preduslov za bilo kakvu inicijativu o recikliranju...

In the winding process, on its way from the spinning tube to the bobbin, yarn was exposed to different influences that caused various tensions in different sectors. The increase in the tension force brought about a decrease in the linear density of all the wound yarns. All of this influenced the resulting tension with which the yarn was wound onto...

The physical-mechanical properties of yarns, similar to those of other solid matters, are a function of their structure. Yarns are composed of fibres of different lengths and shapes, resulting in yarn spirals with varying radii, which can form kinks at intervals, and even project from the yarn surface. Therefore, it is not the overall length of the...

Fabric breakage characteristics depend on their structural and constructive solutions. Through the usa of familiar structure parameters and fabric construction, as well as the results of their structural and mechanical characteristics, dependencies have been set up which can be used for projecting breakage force and breakage of a fabric's length in...

There have been many attempts to pre-determine the yam quality, taking in consideration, besides the fibre type, also the spinning system and machinery working conditions taking part in the process of yam manufacturing. All these attempts can be divided into theoretical ones, when complex mathematical models are obtained, and arithmetically-empiric...

The physical-mechanical properties of yarns, similar to those of other solid matter, are a function of their structure. The yarns are composed of fibers of different lengths and shapes, resulting in yarn spirals with varying radii, forming kinks at intervals, and even projecting from the yarn's surface. Therefore, it is not the overall length of th...

In the knitting process on Rachel warp knitting looms, yarn tensioning and oscillation in the knitting and compensational zones of the machine are very important; the phenomena should be investigated and the process controlled, especially considering the recent increase in working speed and the growing use of man-made threads. The tensioning and os...

In the winding process, yarn is exposed to various factors on its way from the spinning tube to the bobbin which influence yarn tension in particular sectors of the yarn path. This results in the tension with which the yarn is wound on the bobbin. In this work, the yarn tension of the wound yarns was measured under different winding conditions; aft...

The standard highest fineness of rotor-spun yarns from 50 to 20 tex can be changed by the use of the combed cotton slivers and the chemical fibre slivers, so-called Ricofil yarn on "Rieter" equipment, or however, by the use of the finer micro fibres in the cotton fibres blend and absolutely. In this paper the mechanical characteristics have been an...

In the winding process, on its way from the spinning tube to the bobbin, yarn was exposed to various influences that caused various tension in various sectors. All that influenced the resulting tension with which yarn was windied on to the bobbin. Yarn tensions were defined under various winding conditions. Afterwards, one-cyclic mechanical propert...

The influence of the treatment time and temperature during the bleaching process with an unconventional agent on the structure and properties of cotton materials has been studied. After bleaching, the fabric was submitted to reductive clearing when maximum whiteness was obtained. The whiteness degrees (C.I.E. and Berger), breaking strength and elon...