Rok 2023
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- 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.
- ItemANTIMICROBIAL ACTIVITY OF COTTON FIBRES TREATED WITH PARTICLES EXTRACTED FROM CITRUS PLANTS: A REVIEW(Technical University of Liberec, ) ALI, REHMAT; KARAMAT, UM E HABIBA; NAZIR, HAFIZA SABA; BAIG, MIRZA MUHAMMED MOHSIN; KHAN, BILAL ALAM; ULLAH, ASAD; USMAN, OSAMA; WASEEM, TANYA; TAHIR, MUHAMMAD FARRUKH; Technická univerzita v LiberciNanotechnology is an emerging technology in textile sector for the fabrication of functional textiles with different properties such as antibacterial, hydrophobicity, UV-protection, flame retardancy, anti-static and self-cleaning. In current COVID-19 crises, the development of antimicrobial textiles through the deposition of nanoparticles has emerged as a research subject of particular interest. Recently, the green-synthesis of nanoparticles from plant extracts has become an effective alternative to conventional physical and chemical synthesis methods due to being environmentally benign and nontoxic. In this review article, the significance of nanotechnology in antibacterial finishing of textiles, mechanism of antibacterial activity of nanoparticles, significance of green synthesis methods for nanoparticles have been discussed. The green-synthesis of different nanoparticles from the citrus plant extracts and their application on textiles for imparting antibacterial activity is reviewed in particular. The chemical composition of citrus plant extracts and their role as bioreductants in the synthesis of nanoparticles is also highlighted. Moreover, different qualitative and quantitative standard testing protocols employed for the antimicrobial characterization of plant extracts and textiles have been discussed. The major challenges and limitations associated with the plant-based biosynthesis of nanoparticles have also been highlighted.
- 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.
- 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%.
- ItemCOMFORTABLE AND PROTECTIVE HYBRID WEFT-KNIT PLATED FABRIC FROM GLASS AND WOOL/ACRYLIC YARNS(Technical University of Liberec, ) İNCE, MEHMET ERDEM; İNANIR, SEVGI; ERDOĞAN, ESRA KUMSAL; Technická univerzita v LiberciIn this study, hybrid weft-knit plated fabrics were produced by co-feeding glass and wool/acrylic blend yarns. While the wool/acrylic yarn in contact with skin is expected to provide comfort, the glass yarn next to the environment is to provide protection. The physical, structural, air permeability, bursting strength, and the protection against flame properties of glass plus wool/acrylic plated fabric were compared with the reference fabrics consisting completely of glass or wool/acrylic blend yarn. Two factors: the yarn composition and the cam setting of the knitting machine were considered. Two-ply of glass yarn was fed to the each face of the reference glass fabric, and a single-ply of wool/acrylic yarn was fed to the each face of the reference wool/acrylic fabric. On the other hand, while the hybrid plated fabric’s back face accommodated two-ply of glass yarn, its front face involved a single-ply of wool/acrylic yarn. Two different cam settings, loose and tight, were selected. The physical and the structural properties of the fabrics were measured. Then, air permeability, bursting strength, and the protection against flame tests were performed. Test results were subjected to detailed statistical data analysis and how they were affected by the yarn composition and the cam setting was presented with visual and self-explanatory graphs.
- 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.
- ItemDESIGN AND INVESTIGATION THE OPERATION OF TEXTILE BASED ELECTRODES FOR ELECTROTHERAPY(Technical University of Liberec, ) AGHADAVOOD, ROYA; SHAHBAZ, ZAHRA; KHEIRI, TAHEREH; SHANBEH, MOHSEN; MARTINEK, RADEK; Technická univerzita v LiberciElectrostimulation is a way of treatment various nerve and muscle injuries as well as acute and chronic pain conditions. The electrotherapy which is increasingly used in physiotherapy, muscle is exposed to an electrical pulse in order to activate excitable tissue using external electrodes with the aim of building muscle strength, enhancement healing, improvement in patient’s mobility or reducing painTextile based electrodes are significantly noticed in the aspects of being flexible and re-usable and no needs of hydrogels, thereby avoiding skin irritation and allergic reactions and enhancing user comfort. This article presents a kind of textile based electrodes made of conductive yarns containing stainless steel/plyester blend fiber. The embroidery technique was used to prepare the textile based electrodes.Samples were examined on 10 people with pain in their bodies in a hospital without being moisturised. The purpose of this study is to asses the performance of 3 different textile based electrodes, considering the conductivity of the yarns which have been used to produce textile based electrodes, the usfulness of them for electrotherapy and comparing them with rubber electrodes commonly are used in clinics regularly.
- ItemDESIGN OF ELECTRONICALLY CONTROLLED JACQUARD MACHINE FOR MULTI-SHED WEAVING MACHINES(Technical University of Liberec, ) ARSOY, RAŞIT; ASLAN, SELÇUK; Technická univerzita v LiberciThe Jacquard shed opening system, which makes it possible to open the shed by controlling the warp threads in groups and obtain different designs and shapes, differs from other shed opening systems in that each group of warp threads and each of them can be controlled as needed. The various warp movements, which are limited by the number of frames in other shedding systems, are limited by the number of sinkers in the Jacquard system. Since all known Jacquard shedding systems are designed for operation with single shed weaving machines, they cannot be used for shedding on multiple weaving machines. In this study, a new electronically controlled jacquard machine for multiple shed weaving machines was developed, which eliminates this problem and enables the opening of the weaving compartments by controlling the warp threads individually in multiple shed weaving machines, thus allowing the weaving of all known jacquard fabric patterns. The technological and kinematic schemes of the jacquard machine were prepared taking into account the type of fabric to be produced, the operating principles of the weft insertion and shedding mechanisms to be used in the machine to be developed, and the expectations for improving the technical and economic indicators of the machine. The electronically controlled pattern reading system, which consists of modules in the machine, converts the electronic data into mechanical data to ensure shedding. In the cam shedding mechanism, which transmits motion to the knives in the form of a stepped shaft in the multiple weaving machine, the warp threads are placed on the knives so that they can move vertically. They are controlled by specially structured sinkers which, in contact with the blades, move from the lower to the upper state with the help of the blades and from the upper to the lower state with the help of springs. When the warp threads are to remain in the upper position according to the pattern, the sinkers are interlocked by electromagnets to form an undulating nozzle corresponding to the fabric pattern. By arranging the interlocking projections along the sinker, it is possible to match the density of the sinker to the density of the warp threads. Since the machine allows weaving of all known jacquard fabrics, the problem of not being able to produce weaves other than the rag foot weave, which is considered one of the major drawbacks of multiple shed weaving machines, has been solved.
- ItemDETECTING DAMAGED ZONES ALONG SMART SELFSENSORY CARBON BASED TRC BY TDR(Technical University of Liberec, ) GABEN, MAHDI; GOLDFELD, YISKA; Technická univerzita v LiberciThe study aims to investigate the ability of smart self-sensory carbon roving to detect damaged zones in TRC structures. State of the art monitoring procedures are based on integrative measurements and accordingly are limited in detecting only the occurrence of damage. This study aims to handle this limitation and offers to adopt the Time Domain Reflectometer (TDR) technique. The TDR concept is widely used in Bayonet Nut Coupling (BNC) cables to identify defects along the cable (opens, shorts, etc.). The current study adopts its principle to carbon rovings. To simulate the BNC cable configuration, the study offers to connect two parallel carbon rovings to the TDR Data Acquisition (DAQ) system. The proposed monitoring technique is investigated by loading two textile reinforced MPC beams under uniaxial tensile loading. Results show the potential of the suggested technique to locate damage zones in TRC structures and highlights its limitation.
- 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.
- ItemTHE EFFECT OF POLYMER TYPE AND FIBER ORIENTATION ON THE COMPLIANCE PROPERTIES OF ELECTROSPUN VASCULAR GRAFTS(Technical University of Liberec, ) OZDEMIR, SUZAN; OZTEMUR, JANSET; SEZGIN, HANDE; YALCIN-ENIS, IPEK; Technická univerzita v LiberciVascular diseases are a major source of fatalities globally. However, the lack of accessibility of autologous vessels and the poor efficacy of commercial small-diameter vascular grafts limit surgical alternatives. Researchers therefore aimed to develop vascular prostheses that meet all requirements. Apart from the benefits of tissue-engineered grafts, significant obstacles that still hinder successful grafting include compliance mismatch, dilatation, thrombus development, and the absence of elastin. Among these issues, compliance mismatch between native vessel and artificial vascular scaffold has been mentioned in the literature as a possible cause of intimal hyperplasia, suture site rupture and endothelial and platelet cell damage. As a result, the usage of suitable materials and optimized fabrication techniques are required to achieve better control over the characteristics and functionality of the grafts. In particular, in the case of electrospun vascular grafts, the compliance can be adjusted throughout a broad range of values by adjusting the electrospinning parameters such as material selection, fiber orientation, porosity, and wall thickness. In this study, the electrospun vascular grafts consisting of pure PCL, PLA, and their blends were produced by using two different rotation speeds to achieve the oriented and non-oriented scaffolds. The impact of polymer type and fiber orientation on the compliance properties was evaluated. The results revealed that both material selection and fiber alignment have a significant effect on the compliance levels. PCL100_R grafts had the highest compliance value whereas the PCLPLA50_O scaffold had the lowest.
- ItemEFFECT OF TENSILE FATIGUE CYCLIC LOADING ONPERFORMANCE OF TEXTILE-BASED STRAIN SENSORS(Technical University of Liberec, ) SAJJADIEH, SABA; SAFARI, FATEME; GHALEBI, BAHARE; SHANBEH, MOHSEN; Technická univerzita v LiberciTextile-based strain sensors are a potential platform used in wearable devices for sensing and. 8 sensors containing monitoring the human body. These sensors not only have all the conventional sensors benefits but also, they are low-cost, flexible, light-weight, and easily adopted with three-dimensional shape of the body. Moreover, recent research has shown they are the best candidates for monitoring human’s body motion. In this study, the effect of tensile fatigue cyclic loads on performance and sensitivity of textilebased strain sensors was investigated polyester/stainless steel staple fiber blend yarn as a conductive part with different structures were produced. The sensors varied in weft and warp density, percentage of stainless steel in conductive yarn, the number of conductive yarns, and weave pattern. The sensors were subjected to 500 cyclic loads operations and their tensile properties and sensitivity were investigated and compared before and after applying tensile fatigue cyclic loads. The results showed the textile-based strain sensors containing less percentage of stainless-steel fiber, lower number of conductive yarns, twill weave pattern and lower density in warp and weft direction have shown better performance after tensile fatigue cyclic loads
- 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.
- ItemEVALUATION OF THE QUALITY OF CELLULOSE SEMI-FINISHED PRODUCTS FROM TECHNICAL HEMP AND THE POSSIBILITY OF THEIR FURTHER USE(Technical University of Liberec, ) Lialina, Natalia; Yudicheva, Olha; Samoilenko, Antonina; Berezovskyi, Yurii; Moroz, Oleg; Bondar-Pidhurska, Oksana; Glebova, Alla; Khliebnikova, Nataliia; Novikova, Vira; Technická univerzita v LiberciThe article discusses the issues of processing industrial hemp into goods for various functional purposes. Particular attention is paid to the processing of hemp trusts into cellulose-containing semi-finished products, as well as to the analysis of the properties of cellulose-containing fibrous materials obtained from industrial hemp. Based on the results of the study of physical, mechanical and organoleptic characteristics of the obtained cellulose-containing semi-finished products, their suitability for the pulp and paper industry and other sectors of the national economy has been established. The presented research is relevant for the purpose of creating an own raw material base for pulp and paper enterprises and light industry enterprises.
- ItemFABRICATION AND CHARACTERIZATION OF ELECTROSPUN ANTHOCYANIN-LOADED POLYLACTIDE NANOFIBERS(Technical University of Liberec, ) PALAK, HANDAN; KAYAOGLU, BURÇAK KARAGÜZEL; Technická univerzita v LiberciIn this study, morphological, chemical and thermal characteristics of biobased and biodegradable anthocyanin-loaded polylactide (PLA) nanofibrous membranes were investigated. To prepare electrospinning solutions, PLA was dissolved at a concentration of 10% (wv-1) in a solvent system of chloroform/dimethylformamide (75/25% vv-1), and anthocyanin at different concentrations (1, 2, and 3% wv−1) was added into the polymer solutions. The prepared solutions were electrospun by using a single syringe electrospinning setup. The morphological, chemical and thermal structure of the neat and anthocyanin-loaded PLA nanofibrous membranes were characterized via Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FT-IR), and Differential Scanning Calorimetry (DSC), respectively. The FT-IR spectra proved the incorporation of anthocyanin into nanofibrous membranes successfully. It was observed that when anthocyanin was added into the polymer solution; bead-free nanofibers were produced, and when the concentration of anthocyanin was increased, mean fiber diameter increased as well. In addition, anthocyanin loading did not affect the crystallization behavior of PLA; however, the glass transition temperature (Tg) of the nanofibrous membranes including no anthocyanin in the structure was higher than those of the other membranes including anthocyanin.
- ItemFORMATION OF COMPLEX 3D SURFACES SCANS FOR GARMENT CAD(Technical University of Liberec, ) Riabchykov, Mykola; Mytsa, Viktoriia; Bondarenko, Mykola; Popova,Tetyana; Nechipor, Svitlana; Nikulina, Anastasiia; Bondarenko, Svitlana; Technická univerzita v LiberciAlgorithms for building scans of complex surfaces of the human body based on three-dimensional measurements were founded. A mathematical model of the surface was developed, followed by the definition of triangulation parameters. The accuracy of building sweeps followed by pattern making depends on the direction and number of geometric elements. The obtained data should be used to improve garment CAD for pattern making for individual consumers.
- 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.
- ItemIMPROVE BUILDING DATABASE ON THE OPERATION PROCESS AND PERFORMANCE TIME FOR SEWING OPERATIONS OF KNITTED GARMENT PRODUCTS(Technical University of Liberec, ) THAO, PHAN THANH; PHAN, DUY-NAM; Technická univerzita v LiberciThis paper presents the findings of the study of building and completion of a standard database on the operation process and sewing time for 02 typical products from knitted fabrics, namely Polo-Shirt and TShirt. The study process is carried out based on applying MTM (Methods Time measurement) standard time analysis method and predetermined time system GSD (General Sewing Data). In this research, we have inherited the results from previous studies including Classifying the main parts sewing linkages, formulated sewing technology process and theoretical analysis of the process of manipulating sewing of the main parts, linkages of the 02 classical textile products including Polo-Shirt and T-Shirt by MTM standard time analysis method and GSD predetermined time system; The studies work of the group of authors on the experimental research content determines the simultaneous influence of a group of factors: distance to place the sewing element (cm), the rotation angle of the sewing element (˚), the size of the sewing element, the number of element layers involved in the sewing, the light intensity (lux) and the skills of sewing workers (grade worker) to the sewing time of knitting products and research simultaneous influences of a group of technological factors including: seam length (cm) and stitches per centimeter (stitches/cm), experiment on 4 sewing devices such as 1-needle lockstitch machine, overlock machine (1 needle and 3 threads) and (2 needles and 4 threads), coverstitch machine (2 needles and 3 threads); and with 3 kinds of single jersey fabrics, which are thin, medium, and thick fabrics to sewing time on the machine of Polo-Shirt and T-Shirt products. The above research results show that there is a big difference between the actual values and theoretically calculated values according to MTM method, GSD predetermined time system, the authors have determined a set of adjustment coefficients for the former and the latter for two values of sewing preparation operation time and sewing time on the machine. We have tested the above research results in 03 enterprises: Hanoi Star Fashion Co., Ltd., Tinh Loi Garment Company and Ha Nam Hanosimex Company Limited and received a lot of practical comments from businesses.
- ItemIMPROVEMENT OF FLAME RETARDANT AND ANTIBACTERIAL PROPERTIES OF COTTON-POLYESTER BLEND FABRICS(Technical University of Liberec, ) HOROKHOV, IHOR; KULISH, IRINA; ASAULYUK, TATYANA; SARIBYEKOVA, YULIA; SEMESHKO, OLGA; MYASNYKOV, SERGEY; Technická univerzita v LiberciThe fire retardant and antibacterial characteristics of cotton-polyester blend fabric have been improved. A composition has been developed for complex finishing of fabric using a phosphorus-containing substance on a biological basis, which, due to its high phosphorus content, can provide a fire-retardant function to textile material, as well as increase its antimicrobial properties. The thermal characteristics of treated textile materials have been studied and it has been established that the presence of phytic acid at the initial stage of destruction shifts the temperature towards lower values due to the activation of phytic acid degradation before the decomposition of the main substrate. The maximum temperature at which the final destruction of the cotton-polyester fabric occurs shifts to higher temperatures from 507°C for the untreated fabric to 565°C for the treated fabric, and the presence of dry residue increases by more than 2.5 times, which proves an increase in the heat resistance of the textile material. The length of the damaged area in the vertical combustion test was 6.5 cm, and the absence of drop formation of the polyester component was also noted, which eliminates the potential destructive effect due to the possible formation of additional fire areas. An increase in fabric antimicrobial activity is confirmed by a zone of inhibition of 2 – 4 mm around the sample using the diffusion method with gram-positive bacteria Staphylococcus pyogenes, as well as a pronounced growth inhibition of microorganisms around fabric samples examined by the method of inoculation of microflora from the environment. Treatment with the studied composition improves washing resistance and does not impair the mechanical properties of the textile material by increasing the degree of crosslinking of the polymer components used in the finishing composition.
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