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, and without distorting its structure. The elastic limit is defined by analyzing the stress–strain curve of analyzed geotextiles. Nonwoven geotextile materials of polyester and polypropylene fibers with surface mass of 150, 200, 250, 300 and 500 g/m2 were used as experimental material.
Effect of false-twist texturing parameters on polyester yarn structure and properties were studied • Texturing speed and heater temperature significantly affected yarn structure and crimp properties • The effect of draw ratio and D/Y ratio on textured yarn structure and properties is less pronounced • Texturing speed can be significantly increased comparing to industrial standard (1100 vs. 700 m/min
GÜNAYDIN KARAKAN GIZEM, ÇEVEN ERHAN KENAN Studiu privind proprietățile de rezistență la întindere și proprietățile de abraziune ale țesăturilor din fire de poliester de tip convențional și ignifuge 407-414 SI CHEN, XIAo-qING WANG Caracterizarea proprietăților de impact și postimpact (CAI) ale compozitelor cu structură 3D 415-420 PoLoNA DoBNIK DUBRoVSKI, ABHIJIT MAJUMDAR Efectele porozității deschise și ale parametrilor de construcție asupra factorului de protecție la ultraviolete al țesăturilor 421-426 DENIZ oZDEN, GULDEMET BASAL Filtru HEPA acoperit cu nanofibră de poliamidă 6/chitosan pentru controlul bioaerosolului 427-434 ABDUL WAqAR RAJPUT, USMAN ALI, AMIR ABBAS, RANA AMJAD, SIDRA SALEEMI Efectul densității lineare a semitortului asupra parametrilor de calitate ai firelor de bumbac 16 Nec 435-438 IULIANA IAŞNICU (STAMATE), GHEoRGHIŢA ToMESCU, oVIDIU VASILE, VIVIANA FILIP, SIMoNA MIHAI Analiza influenței utilizării materialelor textile recuperate asupra proprietăților acustice ale materialelor compozite 439-445 NESMA SAoUSSEN ACHoUR, MoHAMED HAMDAoUI, SASSI BEN NASRALLAH Efectul parametrilor de evaporare şi tricotare asupra comportamentului de permeabilitate: abordări experimentale și analitice 446-450 MARİJA SAVIC, DUSAN TRAJKoVIC, JoVAN STEPANoVIC, PETAR SToJANoVIC, MİRJANA KoSTIC, DİVNA MAJSToRoVIC Influenţa temperaturii şi vitezei de texturare asupra caracteristicilor fizico-mecanice ale firelor de poliamidă texturate prin procedeul de falsă torsiune 451-457 AKCAGUN ENGIN, ÖZ CEVIZ NURAY, YILMAZ ABDURRAHIM, MAZARI ADNAN Investıgarea proprıetăţılor de confort termıc ale jachetelor bărbăteştı dın materıale mono-şı multıstrat 458-463 LAURENŢIU-CHRISTIAN DINCĂ, HoRTENSIA-CLARA RĂDULESCU, DIoNEZIE BoJIN, EMILIA VISILEANU, ALINA PoPESCU, CARMEN-PYERINA GHIȚULEASA Analize statistice dimensionale comparative, prin SEM, între nanotratamentele de Cuo nemetalizate şi metalizate cu aur, de pe substraturi textile 464-469 ADRIAN SALISTEAN, DANIELA FARIMA, MIHAI CIoCoIU, CoNSTANTIN NITE optimizări ale proiectării parașutei de tip ram-air 470-473 HUA YUAN, JUNJIE ZHANG, YUN ZHANG, YAN HoNG, HoNGZHoNG ZHAo Efectele externalităților de aglomerare asupra productivității totale: exemple din industria textilă din China 474-480 Editatã în 6 nr./an, indexatã ºi recenzatã în:
Draping can be defined as a phenomenon of crease-forming when the fabric is put under pressure of its own mass, but without the influence of external forces. The drape ability of the material has a direct influence on the appearance and functionality of the garment. Recent findings in this field indicate that researchers have mostly been defining the phenomenon of draping on the basis of the mechanical characteristics of textiles. This paper presents the method that aims to predict the draping parameters, where drape is defined in dependence of the structure and construction parameters of the woven fabric. A particular attention is focused on connecting the drape coefficient with the fabric weight and relative density of the fabric. Relative density is defined by the structure and construction parameters of the fabric such as: yarn count (tex), fiber density (g•cm-3), the coefficient (factor) of fiber packing in the yarn, the weave repeat, the number of effect-changes in the repeat, the position of intersection points in the weave repeat and the flexibility coefficient of yarns.
A very important characteristic of geosynthetic materials, besides the breaking force and deformation, is the puncture strength of geotextiles. Considering that the purpose of installation geosynthetic materials and inter alia to stabilize and strengthen the soil in which they are installed, it is necessary that they have a high puncture strength in order to fulfill its function. Geotextile materials suffer a great burden and at the installation process, in contact with smaller and larger sharp rocks, and if they have poor puncture resistance they may be damaged. In addition to stabilizing the soil in which they are installed, geotextile materials are used for the protection of geomembranes from puncturing or as an obstacle to sharp materials that are used in a construction to damage geomembrane. For this purpose it is necessary to withstand a lot of pressure on their surface, and to prevent the contact of the sharp material with the geomembrane. This paper presents the analyzed samples of nonwoven geotextile materials made from regular polyester, recycled polyester and polypropylene fibers. Based on the obtained values, it is possible to create an image of the values of the forces that these materials can be submitted to, as well as the differences between geotextiles produced from regular and recycled polyester and polypropylene.
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