Vlákna a textil
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- ItemEvidence tisku Vlákna a textil(2022-04-06) Tunáková, Veronika
- ItemOznámení k evidenci a přidělení evidenčního čísla periodickému tisku(2022-11-09) Tunáková, Veronika
- ItemDESIGNING OF HEALTH-SAVING MEN’S GLOVES(Technical University of Liberec, ) BUKHANTSOVA, LIUDMYLA; LUSCHEVSKA, OLENA; YANTSALOVSKYI, OLEKSANDR; KRASNIUK, LARYS; TROYAN, OLEKSANDR; KULESHOVA, SVETLANA; DITKOVSKA, OLESYA; Technická univerzita v LiberciLiving during a COVID-19 pandemic has negative effects on a person's psychophysiological state such as high-stress levels, leading to poor health, chronic fatigue and insomnia. As a result, the immunity is reduced, which is particularly dangerous today. One way to solve this problem is the use of health-saving clothing, which has additional features that provide the positive effect on the wearer’s body. The developed gloves affect the state of the human autonomic nervous system through biological-active locations in the places of the hand and wrist. An anthropometric study of the biological-active locations of the wrist and hand is performed to construct the glove design. An algorithm for constructing a drawing of the design of the designed product based on four measurements is proposed. The effectiveness of the adaptive gloves is confirmed by studying its effect on the psycho-emotional and psychophysiological state of a person without exposure to the product and after its use by software "Intera-Diacor" and "ROFES", and a questionnaire. The evaluation is performed after wearing gloves for 20-40 minutes. It was found that 83.3 % of the wearers of the health-saving gloves showed positive changes in the body's compensatory forces (stress) and the state of internal emotional fatigue. Thus, the use of health-saving gloves has a positive social, therapeutic (health-saving) and economic effect, as the product has several functions It is an accessory fashion, has hand protection, and, has additional features to positively influence the body of the person wearing it. This allows the future to talk about the use of consumer-friendly and effective ways to correct the men's psychoemotional and psychophysiological states, based on the safer-by-design concept.
- ItemUSE OF CHITOSAN AS ANTIMICROBIAL, ANTIVIRAL AND ANTIPOLLUTION AGENT IN TEXTILE FINISHING(Technical University of Liberec, ) ELAMRI, ADEL; ZDIRI, KHMAIS; BOUZIR, DHOUHA; HAMDAOUI, MOHAMED; Technická univerzita v LiberciWith the industrial developments in recent times, the textile industry also needs sustainable and environmental-friendly resources. Today’s world has been overburdened with the use of synthetic or hazardous materials in day-to-day life. Chitosan polymer obtained from chitin deacetylation, having a lot of properties beneficial to mankind without being hazardous to environment and humans is currently gaining popularity for research and development all over the globe. Antimicrobial and antiviral textile finishing with the help of chitosan is a new trend in the textile field. Also, chitosan having good adsorption properties finds its application in textile effluent treatments. This review reports and discusses multifunctional finishing and dyeing of textiles with chitosan and highlights its application for textile wastewater treatment.
- 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.
- ItemDETERMINATION OF TENSION FOR ARAMID AND CARBON YARNS WHILE WEAVING INDUSTRIAL FABRICS(Technical University of Liberec, ) Shcherban, Volodymyr; Kolysko, Oksana; Melnyk, Gennadiy; Kolysko, Marijna; Shcherban, Yuriiy; Shchutska, Ganna; Technická univerzita v LiberciResulting from researches conducted to determine tension for para-aramid, meta-aramid, and carbon multifilament yarns during their contact with the operative parts of the weaving looms as part of the industrial fabrics formation process, we have found out that in threading areas the tension is increasing driven by variation of values of the friction forces in the contact area. It has been proven that tension degree of para-aramid, meta-aramid, and carbon multifilament yarns before industrial fabric formation area is influenced by (1) tension before cylindrical guide surface of an operative part, (2) radius of the cylindrical guide surface curve of the operative part, (3) contact angle between yarns and cylindrical guide surface of an operative part, (4) mechanical, physical and structural properties of para-aramid, metaaramid, and carbon multifilament yarns. It allowed (yet at the initial stage of design of technological process of industrial fabric formation) to determine para-aramid, meta-aramid, and carbon multifilament yarns tension before formation area depending on (1) form of threading line for yarns at the weaving loom, (2) mechanical, physical and structural properties of para-aramid, meta-aramid, and carbon multifilament yarns and industrial fabrics. The paper contains experimental research of interaction of para-aramid, metaaramid, and carbon multifilament yarns and cylindrical guide surfaces of the operative parts of automatic weaving looms. Based on experimental researches regression dependencies have been obtained between para-aramid, meta-aramid, and carbon multifilament yarns tension value after cylindrical guide surfaces of the operative part and (1) tension before cylindrical guide surface of the operative part, (2) radius of the cylindrical guide surface curve of the operative part, (3) contact angle between yarns and cylindrical guide surface of the operative part. Consecutive application of these regression dependencies allows to determine para-aramid, meta-aramid, and carbon multifilament yarns tension before industrial fabrics formation area. Analysis of regression dependencies allowed to find out values of technological parameters when para-aramid, meta-aramid, and carbon multifilament yarns tension before industrial fabrics formation area will be of minimum value. It will allow to minimize tension of para-aramid, metaaramid, and carbon multifilament yarns while manufacturing resulting in (1) yarn breakages reduction, (2) better productivity of weaving looms due to reduced stoppage time, (3) improved quality of manufactured industrial fabrics. Therefore, we can argue that suggested technological solutions are practically attractive. In view of this, it is reasonable to say that it is possible to directionally regulate the process of para-aramid, meta-aramid, and carbon multifilament yarns tension change while manufacturing industrial fabrics on the weaving looms through selection of values of guides’ geometrical parameters.
- ItemPECULIARITIES OF FUNCTIONING AND DIAGNOSTICS OF CROSS-SECTORAL ECONOMIC LINKS OF THE TEXTILE INDUSTRY OF UKRAINE(Technical University of Liberec, ) Ishchuk, Svitlana; Sozanskyy, Lyubomyr; Technická univerzita v LiberciThe analysis of cross-sectoral links and their comparative assessments identified the main problems of development of the textile industry of Ukraine. These include: high dependence on imported raw materials and components, low price competitiveness of Ukrainian textile industry products in the domestic market, the concentration of a significant part of production on the production of toll raw materials, imports of used clothing and footwear, cross-sectoral imbalance of Ukrainian textile industry. In particular, it is determined that the products of the textile industry in general, consumed by the Ukrainian economy are almost 60% covered by imports. Products used by the textile industry in their activities (costs) are covered by imports by a total of 49%. Ways to solve the identified problems and, thus, to optimize cross-sectoral linksships are proposed.
- 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.
- ItemUSE OF THREE DIMENSIONAL PRINTING IN THE PRODUCTION OF TEXTILE PRINT FORMS(Technical University of Liberec, ) Petrushevski, Andri; Technická univerzita v LiberciSince the invention of woven fabric, various types of artistic printing on fabric have been used. One of the most ancient and widespread methods is letterpress and gravure printing. Besides printing, it is also widely used in industrial textile production. The creation of industrial printing plates is a very expensive process today. For this reason, for small editions more economical technologies are used, such as silk-screen printing. However, gravure and letterpress methods have several advantages over screen printing. Reducing the cost of production of printing plates of this type will be an undoubted progress. The relief on the surface of the printing plate is a three-dimensional construction. Therefore, it can be formed in the form of a digital three-dimensional model. Modern methods of three-dimensional printing make it possible to form a printed form based on such a digital model, suitable for use in the textile and printing industries. The introduction of this technology will definitely reduce the cost of manufacturing forms for textile printing. The article describes an experiment that confirms this assumption.
- 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.
- ItemINFLUENCE OF ANTISTATIC POLYESTER FIBERS ON THE PROPERTIES OF COTTON AND POLYESTER SINGLE JERSEY KNITTED FABRICS(Technical University of Liberec, ) Asfand, Norina; Basra, Sikander Abbas; Daukantienė, Virginija; Jamshaid, Hafsa; Ali, Zulfiqar; Technická univerzita v LiberciIn this research, the influence of the antistatic polyester fibers containing carbon black on the comfort properties of 100% and blended cotton as well as on 100% and blended polyester single jersey knitted fabrics was evaluated. The research results revealed that the behavior of the investigated knitted fabrics was dependent on their structure and mechanical characteristics. The electrical resistance of knitted fabrics decreased significantly due to the use of 4% antistatic polyester fibers. The electrical resistance of the pure and blended cotton knitted fabric was lower than that of the pure and blended polyester knitted fabrics. Antistatic polyester fibers positively influenced the air permeability of the polyester knitted fabric. The air permeability of 100% and blended cotton fabrics was approximately 3.5 times compared to both 100% and blended polyester fabrics, respectively. The carbon black polyester fibers influenced the decrease in thermal resistance, the increase in vapor permeability, and the minor increase in vapor resistance of both cotton and polyester knitted fabrics. Thermal resistance was lower, water vapor resistance was significantly higher, and relative water vapor permeability was slightly lower for the cotton and cotton/antistatic polyester knitted fabrics than for the polyester and polyester / antistatic polyester knitted fabrics, respectively. Therefore, the research results revealed that the presence of 4% antistatic polyester fibers in cotton and polyester knitted fabrics positively influenced their antistatic behavior and improved or almost did not alter their comfort properties.
- 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.
- ItemPHYSICO-CHEMICAL PROPERTIES OF MAGNETITES IN NANOCOMPOSITES ON THE TEXTILE BASES(Technical University of Liberec, ) RED’KO, YANA; GARANINA, OLGA; HUDZENKO, NATALIIA; DUDCHENKO, NATALIIA; Technická univerzita v LiberciThe article is devoted to investigation of the physico-chemical properties of magnetites in nanocomposites on the textile bases. It studies of the structure and phase composition of nanocomposite materials on the polyamide and viscose textile bases. It is shown that magnetite particles synthesized in textile material with average sizes of 9.4 nm in viscose textile material and 9.7 nm in polyamide textile material. The influence of synthesis conditions on the size of magnetite nanocrystallites in textile material is established.
- 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.
- ItemSTUDY OF RIB KNITS COURSEWISE TENSILE PROCESS(Technical University of Liberec, ) Yelina, Tetiana; Halavska, Liudmyla; Bobrova, Svitlana; Lytvynenko, Nataliya; Dzykovych, Tetiana; Technická univerzita v LiberciStretchability of knitwear is one of the most important factors of wearing comfort. Elasticity of knitted structures in course wise direction is usually higher than along wales and often characterized by crosswise shrinkage. Existing methods of knitting program development do not consider the real rate of wale wise shrinkage of rib knitted structure under the course wise extension. During the study experimental research has been carried out to fulfill empirical data on the relationship between samples’ length and width under uniaxial course wise elongation. A range of samples of rib 1×1, 2×2, 3×3, 4×4 and 5×5 knits, made of cotton, bamboo, polyacrylonitrile (PAN), wool/acrylic blend and wool yarn, were stretched with a tensile machine WDW-05M. In the process of stretching the width of each specimen was defined in the moments of extension by 50, 100, 150, 200, 250 and 300 per cent. It has been found that linear approximation can be applied to describe the dependence of specimen’s width on its relative course wise elongation. It was found that the stitch height/width ratio changes unevenly. In the beginning of the process of course wise stretching of a rib knitted structure, it does exist, such an interval, where an increase of the knit’s linear size along the courses occurs without a significant shrinkage in the wale wise direction. It is suggested to name the upper limit of this interval as “unidimensional extension limit” and define it as an extension of a standard (100×50mm) specimen, at which its width decreases by 10%. It was found as well that the value of this index significantly depends on the ribbing variation and much less on the type of raw materials.