[en] The present paper investigates the effect of axial loading compression on jute fibre reinforced polyester composite round tubes. The specimen of composite tube was fabricated by hand lay-up method of 120 mm length with fix 50.8 mm inner diameter to determine the behaviour of energy absorption on number of layers of 45⁰ angle fibre and internally reinforced with and without foam filler material. The foam filler material used in this studies were polyurethane (PU) and polystyrene (PE) with average of 40 and 45 kg/m³ densities on the axial crushing load against displacement relations and on the failure modes. The number of layers of on this study were two; three and four were selected to calculate the crush force efficiency (CFE) and the specific energy absorption (SEA) of the composite tubes. Result indicated that the four layers’ jute/polyester show significant value in term of crushing load compared to 2 and 3 layers higher 60% for 2 layer and 3% compared to 3 layers. It has been found that the specific energy absorption of the jute/polyester tubes with polystyrene foam-filled is found higher respectively 10% to 12% than empty and polyurethane (PU) foam tubes. The increase in the number of layers from two to four increases the mean axial load from 1.01 KN to 3.60 KN for empty jute/polyester and from 2.11 KN to 4.26 KN for the polyurethane (PU) foam-filled jute/polyester tubes as well as for 3.60 KN to 5.58 KN for the polystyrene (PE) foam-filled jute/polyester. The author’s found that the failure of mechanism influence the characteristic of curve load against displacement obtained and conclude that an increasing number of layers and introduce filler material enhance the capability of specific absorbed energy. (paper)

[en] In this study, antifungal properties of fabric knitted from metalized silver/polyester composite yarn were investigated. Intermingling is an alternative technique for yarn blending process. Yarns having different features can be combined by feeding the same intermingling jet. This process is defined as commingling. In the study, intermingling process was used to produce metalized silver/polyester composite yarn. Commingled yarns were knitted to single jersey fabrics by IPM brand sample type circular knitting machine. Antifungal activity test was applied to samples against Aspergillus Niger according to AATCC 30 test procedure. It has been identified that the application provides antifungal activity to fabric. (paper)

[en] Two factors of coating process of 100% polyester fabric with irradiated natural latex which content 10 phr (part hundred ratio of rubber) of isocianate i.e. time curing of 1, 1.5, 2, 2.5 minutes and total number of coating 1, 2, 3 times have been carried out. The importance properties of raining coat i.e. percentage of water absorption, hydrostatic pressure and pull strength have been evaluated. The results showed that by increasing of curing time and number of coating the hydrostatic and pull strength of polyster coated fablic increases, and the percentage of water absorption decrease. The polyster fabric coated by irradiated natural with the film thickness of 40 micron (two times coating), and the curing time of 2.5 minutes at 150 Celcius centigrade, can produce raining coat fabric as well as required. (authors). 7 refs, 3 figs, 2 tabs

[en] Compete text of publication follows. The capillary guiding phenomena is a result of a self-organizing process governing the charge deposition by the incident ions at the inner wall of the capillaries. The ions are deflected by charge patches so they do not suffer close collisions with the capillary wall, even when the capillary axis is tilted with respect to the incident beam direction. This 'fully elastic' guiding has been found to be significant in capillaries of different sizes and aspect ratios, made from different insulator materials, in a wide range of impact ion energies and charge states. In this work, guiding 3-keV Ne⁷⁺ ions through nanocapillaries in insulating polyethylene terephthalate was investigated as function of the capillary diameter. The experiments were conducted at the ZERNIKE-LEIF facility at the KVI Groningen (Netherlands). Highly parallel capillaries with a density of 4 x 10⁶ cm² and diameters of 100, 150, 200, 300, and 400 nm were utilized. The characteristic charges governing the charge evolution of the total ion yield were found to be independent of the capillary diameter. However, certain dynamic properties were found to change significantly with this diameter: The transmission profiles of the 100 nm capillaries are broad and structureless, whereas those for 300 nm are composed of three peaks and the mean angle oscillates with deposited charge. At equilibrium the total ion yield was studied as a function of the tilt angle. The results were used to evaluate guiding angles (see Fig. 1 (b)), which were found to be almost constant near 5.5 deg with varying capillary diameter similarly as the characteristic charge governing the charge evolution. Model considerations were applied to interpret the results. They have led to the conclusions that the effective potential and the capacity of the capillary samples are nearly independent on the diameter. These unexpected results imply the need for further investigations. Acknowledgements. B.S. and Z.J. were supported by the Hungarian National Science Foundation OTKA (No. K73703 and No. PD050000). The work was financially supported by the European Network ITS-LEIF RII3- 026015.

[en] The paper is devoted to development of technology of electrically conductive yarn production. This technology allows manufacturing conductive yarns of copper wire and polyester filament yarns. Method of the predicting of the conductive yarn breaking force was developed on the base of analysing of load-elongation curves of each strand of the yarn. Also the method of the predicting of the conductive yarn diameter was offered. Investigation shows that conductive yarns can be integrated into the textiles structure using sewing or embroidery equipment. Application of developed conductive yarn is wearable electronics creating with wide range of functions, for example, for specific health issue monitoring, navigation tools or communication gadgets. (paper)

[en] The fracture stress of materials typically depends on the sample size and is traditionally explained in terms of extreme value statistics. A recent work reported results on the carrying capacity of long polyamide and polyester wires and interpret the results in terms of a probabilistic argument known as the St. Petersburg paradox. Here, we show that the same results can be better explained in terms of extreme value statistics. We also discuss the relevance of rate dependent effects. (paper)

[en] The aim of this study is filling the gap in the literature about investigating the effect of yarn and fabric structural parameters on burning behavior of polyester fabrics. According to the experimental design three different fabric types, three different weft densities and two different weave types were selected and a total of eighteen different polyester drapery fabrics were produced. All statistical procedures were conducted using the SPSS Statistical software package. The results of the Analysis of Variance (ANOVA) tests indicated that; there were statistically significant (5% significance level) differences between the mass loss ratios (%) in weft and mass loss ratios (%) in warp direction of different fabrics calculated after the flammability test. The Student-Newman-Keuls (SNK) results for mass loss ratios (%) both in weft and warp directions revealed that the mass loss ratios (%) of fabrics containing Trevira CS type polyester were lower than the mass loss ratios of polyester fabrics subjected to washing treatment and flame retardancy treatment. (paper)

[en] The recycled fibres and textiles were used for the protection of the steep slope exposed to intensive rill erosion. One part of the slope was protected with the geotextiles formed from the meandrically arranged thick ropes containing a nonwoven manufactured from a blend of recycled natural and synthetic fibres. For the protection of the other part, the recycled polyester fibres mixed with the covering soil were applied. After the installation, the behaviour of the slope was monitored and the efficiency of both techniques was compared. It was stated that both, the geotextiles and the loose fibres randomly distributed on the soil prevent washing away the soil particles and protect the slope from sliding. It was revealed that the recycled fibres can be satisfactory utilized for the efficient protection of the slope against erosion and sliding. (paper)

[en] This paper introduces the braided helically wrapped yarns with negative Poisson’s ratio (NPR) exhibiting a stable structure and good practicability to avoid slippage of wrapped component from the core. The geometry and auxetic behavior of the braided helical structure for two different combinations of core materials with similar combination of wrap materials and different braiding angles have been analyzed. Two elastomeric materials i.e. Polyurethane (PU) and Polyester, were used as monofilament cores whereas two stiffer multifilament wrap yarns employed were, ultra-high molecular weight polyethylene (UHMWPE) and polyethylene terephthalate (PET). Multiple braided yarns were investigated to analyze materials’ behavior towards NPR. It was observed that the NPR strongly depended on the inherent properties of the core and wrap materials in addition to the braiding angle. The NPR value was higher for a core with relatively higher elasticity (e.g., PU elastomer compared with polyester). It was also noticed that a lower wrap angle and lower braiding speed exhibited higher NPR. The maximum NPR value using PU core wrapped at a low angle of 9° was - 1.70, when tested at a low strain rate of 0.5%. (author)

[en] The kinetics of nonisothermal crystallization of three different types of linear aromatic polyester, namely poly(ethylene terephthalate) (PET), poly(trimethylene terephthalate) (PTT), and poly(butylene terephthalate) (PBT), which are different in their number of methylene groups (i.e. 2, 3, and 4 for PET, PTT, and PBT, respectively), was investigated using differential scanning calorimetry (DSC). Analysis of the data was carried out based on the Avrami, Tobin, Ozawa, and Ziabicki models. It was found that the Avrami model provided a more satisfactorily good fit to the experimental data for these polyesters than did the Tobin model. The Ozawa model was found to describe the experimental data fairly well. The Ziabicki's kinetic crystallizability parameter G for these polyesters was found to be of the following order: PBT>PTT>PET. The effective energy barrier for nonisothermal crystallization process of these polyesters, determined by the Friedman method, was found to be an increase function with the relative degree of crystallinity