Rok 2023
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- ItemTHE DEVELOPMENT AND ANALYSIS OF ECO-PRINT AND SCREEN PRINTING COMBINATION USING NATURAL DYES(Technical University of Liberec, ) TRI, YULIANA; NOORYAN, BAHARI; Technická univerzita v LiberciNatural dye is one of the solutions to alleviate environmental damage caused by the textile industry. Existing synthetic dyes have been proven to adversely affect the environment and human. Hence, revisiting natural dyes becomes a correct decision to alleviate existing environmental problems. Eco-print is one of the natural dyeing methods done by using plants typically found in the surroundings. This method has become the subject of various developments, both in its mordanting and making processes. Its visual aesthetics should also receive attention to avoid stagnation. Further development and innovation are necessary. The purpose of this study was to develop the visual aesthetic aspect of the eco-print method. It particularly focused on developing the design and production technique in terms of concepts, materials, and working techniques. This work also adopted a screen printing technique to enrich the motifs and colors. The method utilized in this research was art-based research with the premise of adapting artistic creativity to social research using an artistic practice approach because both are holistic and dynamic. The result showed that eco-print and screen printing methods could be combined, as the latter significantly enhance the eco-print product’s visual aesthetics. However, the result of this combination exhibited poor color fastness, implying the need for further study.
- ItemAN ECO-FRIENDLY DYE FOR BATIK CLOTHES: A NATURAL DYE SOLUTION MADE OF MANGO SEEDS EXTRACT (Mangifera indica L.)(Technical University of Liberec, ) Sobandi, Bandi; Supiarza, Hery; Gunara, Sandie; Gunawan, Wawan; Hamdani, Hafizh Yasir; Technická univerzita v LiberciWaste pollution resulting from the production process of synthetic batik dyes is against the Sustainable Development Goals (SDGs) in the aspects of waste management systems and clean water. One effort to cut down the amount of pollution is the use of natural dyes for coloring batik clothes. This undertaking is not only healthy but also expected to bring in some added value economically, community empowerment, and intergenerational inheritance. This experimental research was carried out collaboratively between the Textile and Batik Craft Studio at the Indonesian University of Education, the Umymay Batik Studio, and the Yogyakarta Batik and Craft Center. A batik cloth was dyed 5 times with a mango seed extract solution as the dependent variable, then fixed with lime solution (Ca(OH)2) and Ferrous Sulfate solution (FeSO4.7H2O) as the independent variables. The dyed fabrics were tested for their colorfastness against washing and sun exposure. The results of the study: 1) The process of dyeing the batik cloth was performed through several stages, that is, by cutting the cloth with a canting stamp, dyeing the cloth, and fixing it with Ca(OH)2 and FeSO4.7H2O, the batik cloth fixed with Ca(OH)2 tended to be brown in color while the other one fixed with FeSO4.7H2O resulted in black; 2) The results of the Color Fastness Test against Washing at 40℃ on the batik cloth that has been dyed with mango seed extract fixed with Ca(OH)2 and FeSO4.7H2O were considered a good category with respective values of 4 on a scale of 5. Likewise, the results of the Color Resistance to Light: Day Light Ray Resistant Test Value with the fixation of Ca(OH)2 and FeSO4.7H2O was in the moderate category with a value of 3 each on a scale of 5. There should be a governmental policy to promote a green industry. As for batik artisans, they can utilize an eco-friendly alternative dye for batik clothes.
- ItemINVESTIGATION OF THE USAGE OF ALTERNATIVE NEW GENERATION ECO-FRIENDLY FIBER BLENDS IN SYNTHETIC BASED DENIM FABRICS(Technical University of Liberec, ) ŞARAPNAL, DILEK; BABAARSLAN, OSMAN; Technická univerzita v LiberciPolyester yarn is made from post-consumer waste such as bottles, fabrics, etc., in the composition of polyester ethylene terephthalate (PET). Polyester (mainly polyethylene terephthalate, PET) is the most commonly employed textile fibre with over 50% share in total production of textile fibres. Pla is a biobased and biodegradable polymer produced from renewable resources. PLA is also a thermoplastic aliphatic compostable polyester. In this study, 75% Cotton - 25% PLA, 75% Lyocell - 25% PLA and 75% Cotton - 25% PET blended yarns were produced as rigid, corespun and dualcore in the ring spinning system .The fabrics were weaved with produced yarn. In the finishing processes, some of the fabrics were treated with caustic and some of the fabrics were only washed. Fabrics containing PLA and PET were compared with each other. Fabrics containing PLA and PET fiber were evaluated in terms of strength, elasticity, abrasion and pilling performances. Although the weft tensile and tear properties of Cotton-PLA blended fabrics are lower than Lyocell-PLA and Cotton-PET blends, it has been indicated that PLA blended yarns can be used as an alternative to PET based yarns and fabrics.
- ItemSOLUTION BLOWN OF PLA NANOFIBER CONTAINING OZONATED MORMODICA OIL AND ITS MICROCAPSULES TO OBTAIN ANTIBACTERIAL MEDICAL TEXTILES SURFACES(Technical University of Liberec, ) PEKTAŞ, KORAY; BALCI, ONUR; ORHAN, MEHMET; Technická univerzita v LiberciIn the scope of the study, it was aimed to obtain antibacterial nanofiber surfaces containing Momordica oil, its ozonated oil form and its microcapsules forms. First of all, Mormodica oil was exposed to ozone gas for 135 min. After that, crude and ozonated mormodica oil were microencapsulated by using simple coacervation. Subsequently, %10 PLA polymer solution were prepared and used for obtaining PLA nanofiber surface by using solution blowing spinning. Besides, PLA polymer solution were mixed with crude mormodica oil, ozonated mormodica oil and their microcapsules forms and then these solutions were spun by using solution blowing spinning. Obtained ozonated oil, microcapsules and nanofiber surfaces were characterized via measurement of total unsaturated fatty acid amount in the oils, scanning electron microscope, FT-IR analysis and antibacterial activity test. The data showed that mormodica oil were ozonated. Microencapsulation process was done successfully and obtained nanofiber containing mormodica oil and its microcapsules. Moreover antibacterial activity showed that mormodica oil and ozonated mormodica oil showed antibacterial activity against to S.aureus and E.coli bacteria according to the disc diffusion method. The nanofiber surfaces containing ozonated oil and its microcapsules showed antibacterial activity against to S.aureus and E.coli bacteria according to the ASTM E 2149-01 method. As a result, it was obtained biodegradable nanofiber containing microcapsules and showing antibacterial activity.
- ItemBUILDING DATABASE IN BALANCING KNITTED GARMENT LINES SOFTWARE IN INDUSTRY(Technical University of Liberec, ) THAO, PHAN THANH; PHAN, DUY-NAM; Technická univerzita v LiberciThe garment industry is one of the key industries contributing to the economic growth of Vietnam. Industry 4.0 has significantly altered the operational procedures of conventional enterprises. The implementation of technological, digital, and artificial intelligence applications has increased the global efficacy of corporate governance. To successfully assimilate into the regional and global economies, Vietnamese businesses must enhance their management capabilities and maximize both the quantity and quality of their products. In order to achieve this objective, the authors have conducted research to develop a database of sewing line balancing implemented in Assembly Line Balancing software for two common knitted products, namely Polo- Shirts, and T-Shirts. School of Textile-Leather and Fashion, Hanoi University of Science and Technology (HUST) methods compared and evaluated this result of sewing line balancing of 2 Polo-Shirt and T-Shirt products according to the manual, software, and actual calculation method at 3 enterprises: Star Fashion Company Ltd., Regent Garment Factory Ltd., and Hanoi General Textile Garment Joint Stock Company (Hanosimex). Since then, we have completed the sewing line balancing database for Polo-Shirt and T-Shirt products to row sewing lines for cases in which the path of semi-finished products is both straight and zigzag. The findings of this study can be applied to group conjugation lines and suspended lines transporting semifinished goods. The database has been constructed meticulously and standardized to ensure the diversity, richness, and universality of all product technology structure options applicable to garment companies. The database is utilized in the Assembly Line Balancing software developed by the research team; this is an application-oriented research product that will transfer technology to garment enterprises producing knitwear, assisting them in overcoming current challenges. Reasonable production line layout contributes to optimizing existing production conditions, increasing labor productivity and the efficiency of production organization, and laying the groundwork for the application of digital technology.
- ItemIDENTIFYING THE MATERIALS IN ARCHAEOLOGICAL TEXTILES(Technical University of Liberec, ) BŘEZINOVÁ, HELENA; PECHOČIAKOVÁ, MIROSLAVA; GRABMÜLLEROVÁ, JANA; Technická univerzita v LiberciGiven their organic origin, textiles rank among the rarest archaeological finds. While the vast majority of these artefacts are preserved as small fragments or mineralised remnants, their detailed textile technology study provides interesting and important information about the use of textile techniques and the quality of processing. The most important information concerns the utilised textile materials, but for degraded textiles, these materials are among the most difficult information to obtain. Image analysis using electron microscopy (SEM) is a significant aide in this pursuit.
- ItemELECTRIC HEATING CLOTHING FOR MOTORCYCLISTS(Technical University of Liberec, ) ARABULI, ARSENII; ARABULI, SVITLANA; KYZYMCHUK, OLENA; MELNYK, LIUDMYLA; Technická univerzita v LiberciIn recent years motorcycling becomes more and more popular. It is known that even in relatively warm weather, moving air is cooler and constant exposure to wind when riding may cause a chilling effect that leads to hypothermia. Motorcyclists may lose the ability to concentrate and react on changing traffic conditions when they have hypothermia. We propose the use of electric heating elements in the jacket so that motorcyclist comforts increase. This element receives the energy from the worked engine of the motorcycle. It is located between the two fabrics layers (top and lining) and is made of nichrome wire. The heating is carried out by connecting this element with the power supply system of the motorcycle. In research, we use two types of packages that differ by top fabrics and two connection circuits. The studies were carried out in three different environmental conditions (air temperature, wind speed, and air humidity). Standard test methods were used for performance testing. The effectiveness of electric heating elements used in underwear space for increasing the thermal properties of motorcyclist clothing is proven. It was established that the use of an electric heating element is effective only with a thermocontroller in the electrical circuit. The results of our investigation confirmed the effectiveness of electric heating elements being used in motorcyclist jackets.
- ItemRESEARCH OF VARIABLE PARAMETERS OF NEEDLE THREAD TAKE-UP MECHANISMS AND DEVELOPMENT OF RECOMMENDATIONS FOR ADJUSTING MULTI-THREAD CHAIN STITCH SEWING MACHINES(Technical University of Liberec, ) MANOILENKO, OLEKSANDR; НOROBETC, VASYL; DVORZHAK, VOLODYMYR; KOVALOV, YURII; KNIAZIEV, ILLIA; SHKVYRA, VOLODYMYR; Technická univerzita v LiberciThe purpose of this research is to develop specific recommendations for optimizing the adjustment of the thread take-up mechanisms of typical chain stitch sewing machines based on the analysis of the thread take-up process. These recommendations are intended to help manufacturers and machine operators achieve maximum productivity and increased product quality, while taking into account the specific technological parameters of the operations performed on these machines. The research is aimed at increasing the efficiency of the sewing process, reducing machine setup time, and improving the overall result of the technological process in the sewing industry. The research uses an analytical method of determining and investigating functions of the actual thread take-up as the instantaneous sum of sections of the take-up contour when adjustable parameters of the mechanisms are changed, taking into account accepted assumptions. In the research, an analytical method was used to determine functions of the actual thread take-up as the instantaneous sum of sections of the take-up contour, taking into account the change in regulated parameters of the mechanisms. At the same time, assumptions were made that has simplified analysis and modelling of this process with sufficient accuracy of calculation results. The scientific novelty of this research lies in discovery of new relationships and establishment of regularities that determine influence of adjustable parameters on the nature and scope of the thread take-up function in chain stitch machines. Further re-search in this area can be aimed to the development of more efficient methods of adjustment and optimization of needle thread take-up mechanisms, as well as to the implementation of new technologies in pro-duction to improve productivity and quality of sewing operations. The obtained results became basis for the development of nomograms for determining the optimal values of adjustable parameters for needle thread take-up mechanisms of typical flat chain stitch machines, taking into account technological parameters of specific operations. These nomograms allow operators and manufacturers of sewing machines significantly simplify adjustment of these mechanisms when using operational equipment or when switching to other technological operations. The obtained results can be applied directly in production during adjustment or repairing of specified ma-chines to increase their productivity by reducing adjustment time and for improving the quality of the technological process.
- ItemRESEARCH ON LIGHT RESISTANCE OF THE CHENILLE COTTON FABRICS’ COLORING(Technical University of Liberec, ) Olijnyk, Halina; Danchenko, Yuliya; Kornytska, Larysa; Technická univerzita v LiberciColour fastness is one of the important characteristics, which depends on the further effective and rational use of the potential fabric resource, durability, wear resistance, and the level of competitiveness in the market. Therefore, evaluating the light fastness of colours of cotton fabrics, in the wear of which sunlight plays a major role, is an urgent scientific task. Chenille cotton fabric, which is currently in demand by textile decorators and modern interior decoration, was chosen for the research. The research was carried out using methods of visual and instrumental colorimetry. The conducted research is valuable for providing information to the market and for further analysis and implementation of the process of developing a system technology for designing chenille cotton fabrics.
- ItemA PRELIMINARY STUDY EXAMINING THE BURST STRENGTH OF VASCULAR TUBULAR SCAFFOLDS(Technical University of Liberec, ) OZTEMUR, JANSET; ÖZDEMIR, SUZAN; SEZGIN, HANDE; YALCIN-ENIS, IPEK; Technická univerzita v LiberciIn this study, neat PCL, neat PLA and PLA/PCL (50/50) based tubular surfaces are produced by electrospinning to simulate the native blood vessel structure and to investigate the effects of both graft material and fiber orientation on burst strength. The burst pressure values of these vascular graft structures that designed with both randomly oriented fibers and oriented fibers, measured by a custom- burst pressure tester, and the results are compared. The results show that fiber orientation have a great influence on burst pressure, regardless of the type of biomaterial. It is determined that grafts with oriented fibers have at least twice the burst strength than those with random fibers. The findings indicate that changing the graft material has also an effect on burst strength. When the results are analyzed by polymer type, although the PLA100_O sample has the highest burst strength among all oriented fiber sample groups, it is better to determine the vascular graft candidate by taking into account radial elasticity.
- ItemPATTERN RELATED ISSUES IN THE MODELLING OF DEFORMED OVER SURFACE WARP KNITTED STRUCTURES WITH LONGER UNDERLAPS(Technical University of Liberec, ) LIU, HAISANG; KYOSEV, YORDAN; JIANG, GAOMING; Technická univerzita v LiberciThe yarn level modelling of warp knitted structures is a complex process. For structures placed on the plane, it is well investigated and there are a few software solutions and papers reported. This paper considers the simulation of warp knitted structure, deformed in the 3D space. Especially the modelling of the areas of high curvature are detailed observed. Underlaps with longer lengths makes an unreal visualization for simulation results. Different pattern with different length of the underlaps are modelled with original algorithm developed by the authors. Modelling and visualization problems in the areas with long underlaps are discussed and possible solutions are proposed.
- ItemCHITOSAN ADDED COMPOSITE VISCOSE YARN AND ITS POTENTIAL APPLICATION FOR DENIM FABRIC DEVELOPMENT(Technical University of Liberec, ) KORKMAZ, AHMET; BABAARSLAN, OSMAN; Technická univerzita v LiberciThe rapid increase in consumption has led to the decrease and even extinction of natural resources on earth. The textile industry also has an important place in terms of consumption. The transition to more sustainable biodegradable products instead of established fossil-based materials has increased rapidly due to textile manufacturers and related industries, legal regulations, social responsibility commitments and increasing ecological awareness of customers. Developing new environmentally friendly, biodegradable material groups with new technologies or by modifying existing technologies has been the main goal of many researchers. In this context, we aimed to develop denim fabric that is effective against strong hospital bacteria by using the yarn containing biopolymer chitosan as a weft in denim production. Chitosan finds wide application in the textile industry due to its biodegradability, antibacterial activity and many more functionalities. Chitosan is used in biomedical textile applications in the textile industry, either as a wound healing, hemostatic (blood stopper), antibacterial, antifungal, either alone or modified to various derivatives or combined with other materials. In this context, instead of using chitosan as a coating material in our studies, chitosan-containing yarn was used in the production of denim fabric in order to distribute the chitosan more homogeneously and to increase the washing resistance. As a result, it was determined that the denim fabric developed by using chitosan-based yarn in weft in denim production reduces hospital bacteria (MRSA-Methicillin resistant staphylococcus aureus) by > 99%.
- ItemOPTIMIZATION OF RAWHIDE COLLAGEN DEFIBRILLIZATION PROCESS(Technical University of Liberec, ) Danylkovych, Anatolii; Lishchuk, Viktor; Sanginova, Olga; Shakhnovsky, Arcady; Technická univerzita v LiberciThe paper features the rawhide collagen defibrillization process in the elastic leather materials manufacturing. Optimal colloid-chemical properties of semi-processed products were defined by way of using mathematical optimization of rowhide liming process. It was found that during the alkaline treatment of raw material (in the operating temperature range) the degree of defibrillation of raw material raises (in proportion to the derm collagen swelling) with increase in the ratio of process solution to the mass of raw material, and the extremum of hydrothermal stability and leather yield can be estimated. It was also shown that the degree of swelling decreases with a decreasing ratio of sodium sulphide and sodium hydrosulphide, and the leather area yield reaches the maximum value at the equal proportion of these reagents. Multicriteria optimization of rawhide liming process using the Harrington’s desirability function was carried out. The developed technology of soaking and liming was tested under production conditions. The above-mentioned low-waste technology provides elastic leather materials with a yield increase by 3.5%, which meet the industry standards requirements.
- ItemA 2D CELLULAR AUTOMATON MODEL OF LIQUID ABSORPTION INTO PAPER FIBERS WITH HYDROPHOBIC TREATMENT(Technical University of Liberec, ) KŘÍŽ, VÍTĚZSLAV; KŘÍŽOVÁ, HANA; KOCICH, MARTIN; DALÍKOVÁ, JOHANA; Technická univerzita v LiberciIn this work, the issue of applying water or a homogeneous aqueous suspension with a uniform size of (nano)particles (e.g., ink) to the surface of SBSK (southern bleached softwood kraft) paper with randomly arranged local hydrophobic treatment is investigated and then simulated. Based on the two investigated models, various simulation approaches were compared, an own simulation model was created, and its validity was subsequently demonstrated on the experiments performed.
- ItemIMPROVING LOCAL THERMAL COMFORT IN BUILDINGS: A STUDY OF PROPERTIES OF HEATING TEXTILE COMPOSITES IN CONSTRUCTION INDUSTRY(Technical University of Liberec, ) KANIA, ANNA; BARBURSKI, MARCIN; Technická univerzita v LiberciThe focus of this study is to analyze heating and insulating properties of textiles utilized in the construction industry. Research regarding textile heating composites typically centers around their use in the fashion industry and personal thermal comfort. Therefore, the study focuses on the application of textile heating composites as a method for improving the local thermal comfort of the user. The aim of this project was to analyze and describe the heating and insulating properties of electroconductive yarns and insulating textiles used in the construction industry. This goal was achieved by building physical samples that underwent heating tests. The next step was to compare the examined properties and select the best combination of yarn and fabric, which was then tested in the target environment. It was concluded that the best heating results are achieved with steel thread embroidered on fiberglass mesh and combined with extruded polystyrene that can be used to improve the local thermal comfort of the user.
- ItemWEAVEABILITY OF SPACER/DISTANCE FABRICS WITH HIGH PERFORMANCE FIBERS ON A TECHNICAL DOUBLE RAPIER JACQUARD WEAVING LOOM USING LANCETS(Technical University of Liberec, ) KOCAMAN, RECEP TÜRKAY; PUTZKE, ENRICO; FICKER, FRANK; Technická univerzita v LiberciIn this study, a technical double rapier weaving loom was used for the weaving of spacer/distance fabrics with a polyester multifilament based ground warp, binding yarns and with polyester and basalt weft yarns. The spacing of the distance fabrics was achieved by using lancets. Four different bindings were developed and three different lancet heights have been used for the spacing. Thus developed spacer/distance fabrics showed uniform spacing between layers with a total thickness from 11.1 mm to 18.5 mm and were characterized according to their compressive resistance and energy absorption properties.
- ItemVIRUSES AND THEIR PENETRATION THROUGH FIBROUS STRUCTURES: A REVIEW(Technical University of Liberec, ) MILITKÝ, JIŘÍ; WIENER, JAKUB; KŘEMENÁKOVÁ, DANA; Technická univerzita v LiberciIn the first part of this review the necessary information about structure and chemical composition of viruses are briefly discussed on the basic level. Main types of interaction of viruses with human cells are briefly described. The basic method of suppressing the spread of viruses from the surroundings of a healthy person and into the surroundings of an infected person is the use of protective equipment, especially face masks and respirators, where the active element is a fibrous structure. The protective functions of these structures depend on their composition (usually hydrophobic materials), construction (fabrics, knitted fabrics, nonwoven fabrics, nano-meshes), morphology (porosity, thickness, pore distribution), the form of virus propagation (usually in water droplets as a type of aerosol), interaction conditions with the surface of the protective layer (speed of impact, conditions of capture on the surface of the fibrous phase, speed of penetration) and the method of virus inactivation (usually contact or very short-range interaction). It is therefore a very complicated problem that is often solved using a combination of mathematical modeling and simulation. The purpose is to present some methods of solving problems related to the protective function of fiber structures, which allow the specification of the suitability of these structures for real use.
- ItemDESIGN A BRA SIZING SYSTEM FOR VIETNAMESE WOMEN BASED ON 3D SCAN DATA(Technical University of Liberec, ) NGUYEN, THANH TUNG; TRAN, THI MINH KIEU; PENG, LI-HSUN; HOANG, SY TUAN; Technická univerzita v LiberciThis study focuses on the body shape of Vietnamese women, collected from large-scale measurement data, to establish a bra size system for mature Vietnamese women aged 18 to 55. Measurement data was collected from 1100 subjects using a 3D scanner. During the data collecting process, 18 measurements at the chest area were classified and used for the research and analysis. Data analysis is performed by the Principal Component Analysis (PCA) method and Numerical Analysis. Mean and median values are used to understand the central tendency of sizing charts. Standard deviation is leveraged to derive size categories, intervals and separate the outliers. Two size-matching solutions are implemented to find the optimal sizing system. The result found a 26 sizes bra system which is a combination of 5 band sizes and 6 cup sizes, with a response rate of 98.27% based on the primary dimensions of bust girth and underbust girth. The study's results were compared with the bra size systems of some countries in Asia and around the world, showing that differences in body shape have led to differences in the systems. the number of sizes. The ultimate goal of this research is to systematically establish a data database with local characteristics and significance that will contribute to sustainable development in academic research, industrial production, application, commercial activities, and service design in the future. The results of this study are meaningful for bra manufacturers in the Vietnamese market and for women in selecting suitable bras for their somatotype.
- ItemPREDICTION OF THE INCREASE IN YARN UNEVENNESS AFTER WINDING PROCESS USING STATISTICAL AND ARTIFICIAL NEURAL NETWORK MODELS(Technical University of Liberec, ) TRUNG, TRAN DUC; TUAN, DAO ANH; HUONG, CHU DIEU; Technická univerzita v LiberciThis paper investigated the prediction of the increase in unevenness of two types of yarn: Ne 30/1 CVCM (combed yarn Ne 30/1, 60% Cotton 40% Polyester) and Ne 30/1 COCM (combed yarn Ne 30/1 100% Cotton) after winding by artificial neural network (ANN) and by statistical models. Four technological winding parameters: the winding speed (Z1), the load on the friction discs of the yarn tensioner (Z2), the distance between the bobbin and the yarn guide (Z3) and the pressure of the package on the grooved drum (Z4) were used as the input parameters to investigate yarn unevenness after winding. The research results showed that by using statistical models, within the selected research range, four investigated technological parameters influenced the increase in unevenness of the two mentioned yarns. The regression coefficients represented the influence of each technological parameter on the increase in yarn unevenness: the winding speed parameter has the most influence on the increase in yarn unevenness with the biggest value coefficients b1 which was 1.2339 for the Ne 30/1 CVCM yarn and this value was 0.6996 for the Ne 30/1 COCM yarn. Moreover, the increase in yarn unevenness predicted by ANNs obtained a higher coefficient of determination (R2), while the mean square error (MSE) and the mean absolute error (MAE) were lower than the ones predicted by statistical models.
- ItemPROPERTIES OF PARACHUTE FABRICS FROM POLYAMIDE AND POLYESTER MATERIALS(Technical University of Liberec, ) MILITKÝ, JIŘÍ; WIENER, JAKUB; KŘEMENÁKOVÁ, DANA; MISHRA, RAJESH; Technická univerzita v LiberciTraditional parachute fabrics are composed from PA 66 (nylon type) multifilament yarns. They are resistant against high frequency repeat deformation but they are able to absorb water which is not optimal for use in different climatic conditions. Challenge is to create parachute fabrics made of PES multifilament yarns which are more versatile. Main aim of this work is to investigate influence of parachute fabric composition and construction characteristics on real end use properties. The relationships based on the prediction of bulk densities were used to calculate the volume porosity. The morphology of the parachute fabrics was evaluated using scanning electron microscopy. Mechanical and dynamic mechanical properties of parachute fabric Ortex made from multifilament PA 66 and PES yarns by Sky Paragliders company are compared.
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