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Dissertations / Theses on the topic 'Knitted textile'
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Paleologos, Esther, and esther paleologos@rmit edu au. "An exploration of new processes and products for knitted textiles: this research will explore the combination of standard and non-standard fibres and finishing processes to create three-dimensional and sculptural knitted fabric structures, while expanding the potential of domestic machine knitting to be viewed as an art form." RMIT University. Fashion & Textiles, 2010. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20100329.143129.
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Contemporary knitting over the past decade has experienced a recent resurgence in cultural interest and technical exploration. This research project aims to identify, through personal practice, the implications of knitting as undefined, removed from the boundaries of product. It is the dissolving of the lines between design, art and craft and exploring the domestically machine knitted textile via the use of materials and the inherent qualities of the fabric which are the driving factors of this research. It is through this exploration that my personal and creative process is diversified. The traditional connotations of knitting are historical, social and cultural, in particular hand knitting. Childhood memories of mothers and grandmothers knitting out of necessity, for clothing, often evoke feelings of safety, warmth and comfort. This familiarity of the looped stitches and understanding of the knit as garment binds knitting to fashion. Industrial knitting process, as scale of stitch is reduced, begins to remove this familiarity and creates an anonymity of structure and process, for example jersey knits used for t-shirts. This instant recognition for knitting as clothing is part of the design process where-by knitted fabrics work in unison with product. It is this boundary that has defined my professional practice designing for knitwear. This research involves a more experimental and fluid approach to producing the textile, considering the qualities and potential of the structure as something to celebrate in its own form. Designers such as Issey Miyake, Hussein Chalayan and the artist Rosmarie Trockel have been influential in taking fashion concepts into the gallery, often knitted. This movement of making conceptual and political statements, especially in the case of the industrially knitted pieces by Trockel, was a step to question the traditional and feminist perceptions of knitting and using the process as a material to create art. While these exhibitions explored the knitted textile in the form of fashion garment, the importance of diversifying the knitted cloth and displaying conceptual pieces is a major influence on this research. Also the more recent exhibition 'Radical Lace and Subversive Knitting', (Museum of Arts & Design New York 2007), has allowed for a reinvigorated forum for constructed textiles to be viewed as object, new product or purely as spatial explorations of structure. The impact of these ideas has allowed for the consideration of the textile being stripped back further and to remove the instant connot ation of product application. Exploration of materials, knitted structures and the manipulation of fabric without the constraints of identified product is the impetus of this project. The evolution of the outcomes is instrumental to the reactions of fibres, stitch and interplays of positive and negative space, while suggestions of product are accidental and created by the knitted form as it is removed from the machine. A personal interest in exploiting the knitted structures potential to possess transparency and opacity, become sculptural and changeable by hand have influenced the choices of material and stitch combination. This experimentation has informed my personal practice and the involved process of making.
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Lima, M. F. de A. G. de. "Automatic handling of knitted outwear garments." Thesis, Loughborough University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383907.
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Lawton, Philip John. "Development of knitted structures for dust filtration." Thesis, Open University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304672.
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Li, Jie. "Description of Jersey knitted fabrics using image processing." Thesis, Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/8595.
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Stöhr, Adriana. "Thermal textile pixels : Out-of-plane and in-plane heat transfer measurements of knitted textiles." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-22178.
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The human body possesses a highly developed range of senses that help orienting oneself in everyday life. Especially when it comes to navigating, perceiving and reacting to the world around us, people tend to rely mostly on their vision and hearing. Suffering from an impairment of either one, or both of the predominating senses means having to counterbalance this constraint. People suffering from blindness and deaf-blindness compensate their impairment mainly by relying on their haptic perception. In this case, information is usually communicated by braille or vibrotactile means. To offer another non-visual and non-audial communication concept this thesis work introduces, the thermal textile pixels. A thermal textile pixel consists of an external thermal device, able to generate hot and cold thermal impulses, and a textile interface to transmit the signal. In order to design such thermal textile pixel it was crucial to be aware of the thermal transfer occurring through and within an textile. Numerous research studies have examined the thermal properties of textiles, especially in the context of clothing comfort, thermal comfort. Nevertheless, it should be considered that as a thermal textile pixel, the textile forms part of a system, governed by many parameters. Therefore, for designing such a device it is important to be aware of the temporal and spatial resolution of the thermal transmitted signal. These characteristics are influenced by multiple textile parameters. For this purpose, a thermal study has been performed investigating in- and out-of-plane signal transmission by textiles in combination with an external thermal device. Using an external thermal device such as a Peltier element allowed to expose the specimens to heating as well as to active cooling. Different knitted structures and material combinations have been examined to gain a first impression on the behaviour of thermal pixels. It was found that thickness and density were the most influential factors for out-of-plane heat transfer. In-plane was found influenced mainly by fibre conductivity. An anisotropic behaviour was noted in-plane, as well as between in- and out-of-plane for heat transfer. Investigating active cooling signals, it was found that a significant decline of performance was noted for all specimens. Plain PA was found to be most suitable for the transmission of heat signals. But did not perform equally well during active cooling phases. Plain Shieldex was observed to perform most steady during heating and active cooling.
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Blomstedt, Bettina. "LUX : Exploring interactive knitted textiles through light and touch." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-12401.
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LUX studies the combination of electronics and knitted textiles from a textile design perspective. The thought of experiencing textiles without touching them sparked the idea of designing textiles where touch is essential for the visual appearance. The aim is to design knitted textiles that light up when touched, in order to create an interactive experience for the viewer. Optical fibres were chosen because of their ability to transmit light and copper yarn works as an electrical conductor that triggers the reaction of light. The shapes of the knitted textiles have been created by utilising the characteristics of the optical fibre. LUX introduces a working method in which the optical fibre is given an important role not only as a light source but also as a tool for shaping the textiles. The result of the work is three textiles that display how electronics, consisting of sensors and light, can be merged with textiles and contribute to interactive behaviour.
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Becerra, Venegas Francisca. "Textile Hybrids : Exploring knitted textiles by challenging properties of elasticity and flexibility through combinations with wood." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-23510.
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Textile Hybrids explores knitted textiles by challenging properties of elasticity and flexibility through yarn composition, technical construction and combinations with wood. This study is placed in the field of textile spatial design and suggests experimental ways to explore three-dimensionality in a knitted textile by changing its properties through material synergies. The outcome is a three piece series of modular three-dimensional, standalone textile objects. The construction, assembly and flexibility of each piece make it possible to separate all components for reassembly, recycling or reusing, suggesting further research possibilities into more tangible contexts within textile spatial design, architecture, furniture design and product design. This study is derived from an interest to explore different ways a textile can exist on its own in a spatial context such as the home, without solely being the material covering a load-bearing framework i.e a couch or a chair.
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Lane, Karen Molly. "Analysis of knitted fabric models using image processing." Thesis, Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/8581.
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Glazzard, M. "Re-addressing the role of knitted textile design knowledge : auxetic textiles from a practice-led, designer-maker perspective." Thesis, Nottingham Trent University, 2014. http://irep.ntu.ac.uk/id/eprint/308/.
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This study reacts to the segregation of knowledge and practice surrounding weft-knitted textiles, their design and applications. This study challenges current disciplinary practices that divide knit into scientific, design and art areas by describing a designer-maker methodology, which is used to produce auxetic, weft-knitted textiles. By using a designer-maker’s practice-led perspective to create functional fabrics, it seeks to challenge the perception that technical and functional research in textiles is or should be the domain of scientific methodologies and engineering practice. This study does not apply external methodologies to the research design, but extracts its methods and values from an existing knit design practice, built from experiential knowledge, that becomes the basis for the methodology. Qualitative and quantitative measures of success are both vital to the methodology used in this study and both subjective and objective perspectives are embraced. The practical work uses designer-maker practice to lead the development of 30 auxetic fabric samples. These fabrics are appraised using a variety of methods including personal reflection, numerical measurement and feedback from focus groups of other practitioners. The information developed on auxetic materials is presented in various ways such as using percentages, diagrams, photographs and videos to encourage dissemination and knowledge transfer between different disciplinary groups. Auxetic effect is conveyed in photographic, diagrammatic, video, graphical, percentage and Poisson’s ratio data to increase understanding to wide audiences and to satisfy traditional, scientific auxetic researchers as well as a new area of design-based practitioners. This study presents the case that there is a valuable, transferrable knowledge in knit design practice that represents existing methodologies used by knit practitioners as well as providing a new methodology for consideration by science and engineering practitioners. This is demonstrated through the production of auxetic, knitted fabrics using a design approach that incorporates qualitative, quantitative, practical, aesthetic, functional and theoretical skills.
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Williams, Stephannia P. "Hydroentanglement Process as a Finishing Treatment for the Enhancement of Knitted Fabrics." NCSU, 2006. http://www.lib.ncsu.edu/theses/available/etd-04072006-140923/.
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This research involves the application of hydroentangling technology as a means of significantly improving knitted fabric properties. In the past, various efforts have been made, directed at improving the dimensional stability and physical properties of woven and knitted fabrics through the finishing technique of hydroentanglement. In such applications, warp and filling fibers in fabrics are hydroentangled at crossover points to effect enhancement in fabric cover. The process parameters of hydroentangling are investigated and optimized to achieve desired results. Potential benefits include enhanced fabric durability, stability, and appearance.
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Jones, Flora. "Disguised Stretch : Changeable knitted textiles with altering functions and visual expressions." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-23504.
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This project places itself in the field of textile design within flat knitting textiles intended as prototypes for interactive textiles with multifunctional purposes and aesthetics. The purpose of the project is to suggest alternative design solutions towards knitted textiles in the field of sportswear that not only acts as a second skin both in terms of appearance and functionality, as well as aesthetic details once the knit interacts with a moving body. The aim of the project, but also offers visual and contrasting functions such as expandability, rigidness and stretch, as well as creating aesthetic details caused by movement of the human body. The design process was conducted in experimental knitting on both industrial and domestic knitting machines, workshops entailing the relation between the knits and the body as well as technically developing the proper bindings to work in unity. Analysis of the knits were made which led to the solely use of these bindings: rib, spacer, links links, ripple and mesh. The outcome of the projects resulted in four knitted textile prototypes, where one of them is designed as a product in the shape of a top, and the others as knitted fabrics each representing two opposing functions. The conclusion drawn in retrospect of this project that by placing opposing bindings parallel, such ripple and links links, it is possible to achieve two opposing functions as well as different visual perception within the same area of a knitted piece.
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Asgharian-Jeddi, A. A. "The study of dimensional and geometrical properties of weft knitted fabrics constructed from cotton yarns." Thesis, De Montfort University, 1985. http://hdl.handle.net/2086/13251.
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Atalay, Ozgur. "Development and investigation of weft knitted strain sensor." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/development-and-investigation-of-weft-knitted-strain-sensor(54fffacb-d1d7-4e9e-9d8f-7f33d4b90d66).html.
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This thesis presents a study of the sensing properties exhibited by textile-based knitted strain sensors. Sensing fabrics were manufactured from silver-plated conductive nylon and non-conducting elastomeric yarns. The component yarns offered similar diameters, bending characteristics and surface friction, but their production parameters differed in respect of the yarn input tension, the number of conductive courses in the sensing structure and the elastomeric yarn extension characteristics. The knitted sensors were manufactured using flat-bed knitting technology, and electro-mechanical tests were performed on the specimens using a tensile testing machine to apply strain whilst the sensor was incorporated into a Wheatstone bridge arrangement to allow electrical monitoring. The novel operational principle relies on the separation under strain of adjacent conducting knitted loops which are normally held in contact by the elastomeric yarn. The results confirm that production parameters play a fundamental role in determining the physical behaviour and the sensing properties of knitted sensors and the response could be engineered by varying the production parameters of specific designs. Results showed that the knitted structures could be manipulated to produce gauge factor values between 2.26 and 0.23 for sensors with working ranges of 8.4 % and 3.3 % respectively when the elastomeric yarn had 8 cN input tension. The generated signals were stable and repeatable, and under cyclic testing proved to be substantially free from long-term drift. A textile-based strain sensor was developed to create a respiration belt; this was realised by bringing together the extensible knitted sensor and a relatively inelastic textile strap. Machine simulations and real time measurements on a human subject were performed to calculate average breathing frequencies under different static and dynamic conditions. Various respiration rates were monitored to simulate different medical conditions and with the belt located either round the torso or in the abdominal area, the sensor yielded a satisfactory response. However, body motion artefacts affected the signal quality under dynamic conditions and an additional signal-processing step was added to separate unwanted interference from the breathing signal. Electro-mechanical modelling was developed by exploiting Peirce`s loop model in order to describe the fabric geometry under static and dynamic conditions. Kirchhoff`s node and loop equations were employed to create a generalised solution for the equivalent electrical resistance of the textile sensor for a given knitted loop geometry and for a specified number of loops. Experimental results were obtained from the sensor for strain levels up to 40% and these correlate well with the modelled data; a maximum error of 2.13 % was found between the experimental and modelled resistance-strain relationships.
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Snedker, Christine. "Knitted objects : Exploring flat knitting as a technique to design form." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-22014.
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This work places itself in the field of textile design, knitting and three-dimensional objects. The primary motive is to investigate flat knitting as a technique to design form. The aim is to explore the possibilities within flat knitting in order to explore the relationship between knit and non-textile components to achieve three-dimensional forms for sitting. The design process consisted of experimental sketching on a flat knitting machine and small prototypes were produced. Rib, plain knit and mesh structures were tested in combination with partial knit, intarsia and plating. These bindings and techniques were combined with steel constructions to explore possibilities for shaping and function. By integrating a non-textile component as support in the knitted samples three-dimensional objects are created. The outcome of the study is a collection of knitted objects. Common for these is that they all suggest a function in relation to seating. The textile in the construction serves a function, an aesthetic expression and as the connection material in the construction. For further development, the possibility of creating textiles for furniture with capabilities for changes in expression and function can be explored.
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Agarwal, Gaurav. "Interaction of textile parameters, wash-ageing and use of fabric softener during the laundry with mechanical properties of the knitted fabrics and correlation with textile hand." Thesis, Lille 1, 2011. http://www.theses.fr/2011LIL10001/document.
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Dans cette thèse, l'influence de lavage répétés et l'utilisation d'assouplissant sur les propriétés sensorielles, mécaniques et physico-chimiques pour la bonneterie ont, a été étudiés Différentes conditions de remplissage de la machine à laver ont été étudiées : soit avec des tricots comportant tous des fibres de même nature, soit avec des tricots de nature différentes. La quantité d’adoucissant déposée sur le textile a été mesurée, l’uniformité du dépôt a été quantifiée par analyse d’image. Le potentiel zéta des fibres et la capacité d’absorption des textiles expliquent les écarts de quantité déposées sur les tricots. L'évaluation sensorielle des tissus a été réalisée par un groupe de panélistes entrainés en utilisant la méthode de comparaison par paire. En outre, un système intelligent basé sur la logique floue pour corréler les paramètres physiques et sensoriels a été développé afin de prédire les performances d'un tricot aprés un grand nombre de cycles de lavageIn this thesis, the simultaneous influence of repeated machine laundry and use of the fabric softener on sensory, mechanical and physico-chemical properties of the knitted textiles was investigated. The deposition of softener was characterised by amount of deposition in different load conditions (mixed fibre load and individual fibre load) and level of uniformity of the deposition. The softener deposition was explained by zeta-potential of the fibres and liquid-absorption capability of the knitted fabrics. The non-uniformity of the softener deposition was quantified by image processing method. The sensory evaluation of the fabrics was carried out by a trained panel using pair-comparison method. Furthermore, an intelligent system based on Fuzzy logic for correlating the physical and sensory parameters was developed in order to predict the performance of a knitted fabric which has gone through number of laundry cycles
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Uline-Olmstead, Molly Louise. "THE KNITTED FLOWER PROJECT: ARTS-BASED RESEARCH WITHIN KNITTING COMMUNITIES." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1245270376.
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Hohenstein, Viviana. "The Space in between : Exploring weave knitted textiles by constructing surface patterns on three-dimensional shapes." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-12398.
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In the field of knitting, the binding weave knitting is mainly used for technical textiles, where the textiles have a high performance require- ment. Weave knit is constructed by placing an inlay thread between the knitting rows in a similar manner as a weft thread in a woven tex- tile. This work sets out to design three-dimensional weave-knitted tex- tiles in combination with intarsia and partial knit with the intention to develop surface pattern on three-dimensional shapes. The material used are effect yarn, monofilament and chenille yarn, which improve the properties of the textile. The three techniques enhance each other by their characteristics and give the possibility of formability. The re- sult shows an installation of textiles with three-dimensional character- istics, meant for spatial contexts which have the ability to function with light. The value of this work lies in the combination of the techniques and the application area in which the work is set.
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Sanches, Regina Aparecida. "Procedimento para o desenvolvimento de tecidos de malha a partir de planejamento de experimentos." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264362.
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Orientador: Franco Giuseppe DediniTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica
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Resumo: As características que determinam a qualidade de um produto de vestuário começam com a seleção das matérias primas, fibras, fios e tecidos, passando pelas fases de criação, desenvolvimento, confecção e acabamento. O objetivo deste trabalho é propor um procedimento para a seleção de matéria prima que será utilizada na fabricação de artigos para vestuário. Foram escolhidos fios de algodão, visando à produção de artigos confortáveis e fios de poliamida e de poliéster texturados ao ar, que possibilitam a produção de artigos com aspecto e toque de fibra natural. Para cada matéria prima, foi montado um planejamento fatorial 22, com o objetivo de identificar os fatores de controle da máquina circular que irão influenciar nas características das malhas. Utilizando a programação linear foi feita a otimização dos parâmetros de controle da máquina e produzidos tecidos de malha com mesmas características. A seleção da matéria prima ideal para a produção dos artigos foi feita utilizando o AHP ¿ Método de Análise Hierárquica
Abstract: The characteristics which determine the quality of a clothing product begin with the choice of raw materials, fibers, yarns and fabrics passing through the creation, development, apparel industry and finishing. The purpose of this work is to propose a proceeding for helping the development of textile products. Cotton yarns were chosen aiming at the production of comfortable goods and polyamide and polyester air textured yarns, which enable the production of goods with natural fiber look and hand. For each raw material, it was provided a 22 factorial design, aiming at identifying the control factors of the circular machine which influence the knitted fabrics. Using the linear programming, the optimization of the machine control parameters was done and knitted fabrics, with the same characteristics, were produced. The choice of the ideal raw material for the production of the goods has been done using the AHP ¿ Analytic Hierarchy Process
Doutorado
Mecanica dos Sólidos e Projeto Mecanico
Doutor em Engenharia Mecânica
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Wolff, Metternich Maria Antonia. "Comfort Zones : The delicate relationship between knitted surfaces and filling materials experienced through human comfort/discomfort." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-22044.
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This paper describes a practice- based research project in which physical and emotional comfort and discomfort is experienced by the human body. A variety of different Comfort Zones are presented. All of them deal with the relationship between filling material and cover, in which knitted structures and materials play a central role in order to create comfort. The elasticity of the knit is challenged when creating volume and emphasizes the idea that comfort is elastic in material/physical way, as well as well in emotions. The use of filling materials gives a new dimension, sensitivity and offers new opportunities. This form exploration discusses the potential of knit to serve as a cover and decorative element, but most importantly the possibility of a textile to create its own filling. By rolling up a knitted tube, volume is built up layer by layer; a torus appears and captures a void in the center of the form, required by the tube, the fundament. Hints of discomfort are given and emphasized by either surface/structure, volume or garments on the body.
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Tinoco, Tejeda Martin Merardo. "Proyecto de exportación de confecciones de tejido de punto con aplicaciones de textilería incaica como opción rentable de negocio con los Estados Unidos de América." Bachelor's thesis, Universidad Ricardo Palma, 2018. http://cybertesis.urp.edu.pe/handle/urp/1452.
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El presente trabajo de investigación se desarrolló con la finalidad de ejercer la profesión de Administración de Negocios Globales, es por ello que se trabajó en las variables propuestas y su factibilidad en la ejecución en base a un estudio de mercado, un estudio organizacional sobre los aspectos legales y el cálculo de la inversión.
El método de investigación utilizado fue el hipotético - deductivo y se aplicaron los diseños experimentales, longitudinales, prospectivos. Se consideró como muestra a 323 personas, todos de nacionalidad estadounidense.
The present research work was developed in order to practice the profession of Global Business Administration, that is why we worked on the proposed variables and their feasibility in the execution based on a market study, an organizational study on the aspects legal and calculation of the investment.
The research method used was the hypothetico - deductive and the experimental, longitudinal, prospective designs were applied. A sample of 323 people was considered, all of them of American nationality.
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Simonsson, Frida. "KNITTING BIG : Ett undersökande i trikåteknikens möjligheter till volym i relation till en möbel." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-170.
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Knitting Big är ett undersökande examensarbete i textildesign med fokus på stickningens möjligheter och förmåga att skapa tredimensionalitet i relation till en möbel. Syftet var att få kunskap i stickningens möjligheter till volym samt att svara på frågeställningarna: Hur förändrar den strukturerade textilen intrycket av formen? Jag vill även ta reda på vad etablerade möbelföretag anser om trikåns möjligheter inom möbeltextil. Projektet har utformats i skolans tre trikåtekniker: handstickning/handmaskin, industriell rundstickning samt industriell flatstick. Under projektet har jag samarbetat med möbelföretaget Homeline. Resultatet av projektet är tre stycken separata textilier som alla ger exempel på volym i trikå. Textilierna är monterade som textila överdrag på pallen ”Polly Fat” från möbelföretaget Homelines sortiment.Knitting Big is a BA degree project in textile design that investigate knitted fabrics possibilities and ability’s to create three-dimensional textile in relation to a furniture. The aim was to learn more about knittings potential in volume and to answer the questions: How is structured textile changing the impression of the form? And what does the established furniture companies think about the possibilities of knitted fabrics in upholstery? The project has been developed in the school’s three tricot techniques: hand knitting / hand machine, industrial circular knitting and industrial flat knitting. During the project I have collaborated with the furniture company Homeline. The result of the project is three separate fabrics which all demonstrate volume in tricot. They are mounted as textile coatings on the stool ”Polly Fat” from the furniture company Homeline.
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Johansson, Isabell, and Lisa Ivarsson. "Textilteknisk menisk." Thesis, Högskolan i Borås, Institutionen Textilhögskolan, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-16396.
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Denna rapport presenterar det examensarbete som gjorts i samarbete med företaget Artimplant. Syftet med arbetet är att ta fram en prototyp av ett meniskimplantat i trikåteknik. Det kräver stickning av en given form och att prototypen ska inneha vissa egenskaper.Ämnesområden som berörs under arbetets gång är textiltillverkning med inriktning mot väfttrikå samt medicinsk textil. Förutom textila ämnesområden tas även ämnen som knäledens anatomi och meniskens uppbyggnad, funktion och skador upp. Kunskaper inom dessa områden krävs för att på bästa sätt ta fram prototyper av meniskimplantat.Att sticka det triangulära tvärsnittet och den böjda formen som krävs för ett meniskimplantat har varit ett arbete som pågått under hela projektet. För att åstadkomma detta och erhålla egenskaper som krävs för en prototyp av ett meniskimplantat har diskussioner förts med produktutvecklare och tekniker, både på Artimplant och på Textilhögskolan för att diskutera möjligheter och utformning. Även möte med ortoped och en av initiativtagarna till Artimplant har givit värdefull information kring hur en prototyp till ett meniskimplantat bör utformas. Dessutom diskuteras och analyseras frågor kring industrialisering av processen och framtagning av kravspecifikation samt hur prototyper förhåller sig till den framtagna kravspecifikationen.Varje enskild prototyp granskas efter framtagning och utvalda prototyper genomgår tester där resultaten jämförs mellan dessa samt enligt kravspecifikation. Detta tillvägagångssätt möjliggör ständiga förbättringar för varje prototyp som tas fram.En slutlig prototyp av ett meniskimplantat har tagits fram och dess egenskaper och utformning möter den framtagna kravspecifikationen. Dess grepp och känsla är liknande en naturlig menisk då den är töj- och formbar, elastisk samt har en slät yta. Formbarheten på prototypen möjliggör anpassning av storlek och positionering vilket medför bra integration till ledytorna. Ytterligare likheter som prototypen har med en naturlig menisk är dess förmåga att stå emot deformation vid kompression.This report presents the thesis that was executed at the company Artimplant. The purpose of this work is to produce a prototype of a meniscus implant in knitted technology. It demands knitting a specific shape and that the prototype shall possess certain properties.The subjects that the report covers are textile manufacturing with focus on weft knits and medical textile. Besides subjects concerning textile technology there are also subjects as the anatomy of knee joint and the meniscus structure, function and damage. Knowledge in these areas is required to develop a prototype of a meniscus implant in the best way as possible.Knitting the triangular cross section and getting the curved shape that a meniscus implant requires have been under constant development during the project. To achieve this design and to obtain required properties for a prototype of a meniscus implant have discussion been held with product developer and technicians, both at Artimplant and at the Swedish School of Textile, to discuss the opportunities and design. Meetings with an orthopaedic, who also was one of the initiators of Artimplant, have provided valuable information regarding the design of a prototype of a meniscus implant. Furthermore, issues related to industrialization of the process, composing a requirement specification and how prototypes are related to the requirement specification are discussed and analyzed.Each produced prototype is analyzed and thereafter prototypes are selected for further tests. The results from the tests are compared between the selected prototypes and according to the requirement specification. This line of action allows continuous improvement for each produced prototype.A final prototype of a meniscus implant has been developed and its properties and design fulfil all of the criteria in the requirement specification. Its hand is similar to a natural meniscus because of its stretchability, elasticity, flexibility and the surface smoothness. The flexibility of the prototype allows adjustments of size and positioning which results in good integration to the knee-joint. Further resemblance is the prototype’s ability to resist deformation during compression.Program: Textilingenjörsutbildningen
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Euler, Luisa. "Impedance and Stimulation Comfort of Knitted Electrodes for Neuromuscular Electrical Stimulation (NMES) : Influence of electrode construction and pressure application to the electrode." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-23896.
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Neuromuscular electrical stimulation (NMES) is a modality of electrotherapy which is aiming to restore and improve muscle function by injecting small levels of current into the muscle using different types of electrodes. Advantages are seen in using textile electrodes which can be integrated into wearables. Previous research has been done for the development of textile stimulation electrodes. However, the focus has not been on the electrode construction itself. Therefore, the influence of electrode construction parameters of knitted electrodes as well as of the electrode condition, i.e. wet or dry, on the skin-electrode impedance and on the perceived stimulation comfort were analysed. Further, the application of pressure to the electrode was investigated. It was found that the electrode condition is the most important parameter for the electrode performance as a wet electrode showed a lower impedance and an improved stimulation comfort with a better skin contact. Followed by this, the pressure was the second most important factor, especially for dry electrodes. A higher pressure reduced the skin-electrode impedance and improved the skin contact in dry condition. Nevertheless, dry electrodes with a high applied pressure still performed worse than wet electrodes. Regarding the electrode design, the most important factor was the electrode size. A bigger size reduced the impedance. Nevertheless, for the application in NMES, a smaller electrode size is to be preferred as it improved the stimulation selectivity and thus, a lower NMES level was required to induce a plantarflexion without affecting the stimulation comfort. The other investigated construction parameters (binding, yarn density, shape) only showed minor influences on the electrode performance. Therefore, the possibilities of applying pressure to the electrode to improve the performance of dry textile electrodes should be further investigated.
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Melin, Lena. "Min magiska värld." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-289.
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”Min magiska värld” är en textil installation avsedd att fungera som en sagohörna i ett bibliotek för barn i förskoleåldern. Med utgångspunkt i 3 mönster skapas en fantasivärld som möter barn på bibliotek. Mönstrade ylletyger har tillverkats för att sedan filtas och placeras i rummet. Meningen med mönstren är att skapa en känsla av skog, harmoni och delaktighet i rummet.”Min magiska värld” is a textile installation with the intent purpose of creating a story time escape for pre-schoolers. Thus, acts as a re-presentment of a creative approach towards the childpractical décor of a library. With an outset of three textile patterns, the textile installation seeks to create an illusion of “ fantasy meets reality “ in the visual aspect of an enchanting grove. The fabric in knitted wool have been designed, fabricated and felted to be placed within the selected area. The layout of the patterns bears the essence of creating an increased notion of participation as well as to instil an impression of the kind of harmony that could be sensed in the forest.
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Cupal, Miroslav. "Komponenty na bázi vlnovodu integrovaného do textilu." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-432454.
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Práce je zaměřena na výzkum struktur založených na vlnovodu integrovaném do textilu (TIW). Pozornost je věnována elektrické charakterizaci textilních materiálů (textilní substráty, nitě), které jsou využívány při implementaci antén, rekonfigurovatelných a aktivních obvodů integrovaných do textilu. Práce se zabývá návrhem vícevrstvých přechodů mezi mikropáskovým vedením na konvenčním substrátu a vedeními integrovanými do textilu. Dále je prezentován koncept přepínače integrovaného do textilu. Přepínač je řízen vodivými sloupky, které vytvářejí otevřenou či zavřenou stěnu prostřednictvím stejnosměrně ovládaných PIN diod. Na závěr je formulována metodika návrhu kruhově polarizovaných antén integrovaných do textilu, jež jsou určeny pro práci v ISM pásmech až do 24 GHz. Všechny postupy návrhu byly ověřeny simulacemi a měřeními reálných vzorků, které byly vyrobeny sítotiskem stříbrnou polymerovou pastou. Polovodičové komponenty byly k obvodům přilepeny vodivým stříbrným lepidlem. Komponenty vyrobené sítotiskem byly porovnávány s referenčními strukturami, které byly realizovány pomocí samolepicí měděné fólie.
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Oliveira, Alexandre Henrique Soares de. "Desenvolvimento de antena CPW em substrato têxtil em estrutura de malha para utilização em sistemas de indentificação por rádio frequência." Universidade Federal Rural do Semi-Árido, 2017. http://bdtd.ufersa.edu.br:80/tede/handle/tede/759.
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Fundação de Apoio à Pesquisa do RN
The knitted fabrics have elastic, easy production and malleability properties, these characteristics be useful in the design of flexible antennas, that can be used in a RFID tag, for example. The mean objective of this work is development of antenna with a Coplanar Waveguide fed (CPW), in a textile knitted substrate, for use in active RFID systems in microwave frequency of 2.45 GHz. From the characterization of the electrical properties by a Vector Networks Analyzer and one with a Dielectric Probe kit, obtained the values of Electrical Permissiveness and Loss Tangent, in sequence was carried out the characterization of the textile properties of Linear Density, Basis weight, Dimensional stability and Tensile Strength, based on the data obtained in characterization process, was chosen two fabrics with properties favorable to the design, modeling and construction of antennas. After the selection of the tissues, simulations were performed on Ansys HFSStm (High Frequency Structural Simulator) to obtain the parameters of Return Loss, Radiation Diagram, Current Density, Impedance, Gain and VSWR, as well as dimensional optimization of the antennas. Two CPW-fed antennas were simulated, one on textile substrate made from Soybean Protein Fibers (SPF) and the other with Polypropylene with corn Polylactic Acid fibers (PP + PLA). Based on the simulations, two antennas with their respective textile substrates were constructed and using a vector network analyzer, the return loss and the impedance shown by the Smith Chart were measured. Both showed a return loss below -10dB for central design frequency and wide bandwidth. The simulated and measured results were compared, analyzing them according to the specialized reading in the area. Showing the feasibility of developing CPW antennas in knitted fabrics for active RFID systems, in addition to the possibility of interoperability in internet of things (IoT) communication systems
Os tecidos de malha apresentam propriedades de elasticidade, facilidade de fabricação e maleabilidade, devido a estas características a utilização desse tipo de tecido traz vantagens na fabricação de antenas para aplicação no desenvolvimento de uma tag RFID. O presente trabalho tem como objetivo desenvolver antenas com guias de ondas coplanares (CPW), em substrato têxtil em estruturas de malha, para utilização em sistemas ativos de Identificação por Rádio Frequência, RFID, para frequência de operação em micro-ondas de 2,45 GHz. Foi realizada a caracterização das propriedades elétricas por meio de um Analisador de Redes Vetoriais e com uma sonda de medição de matérias dielétricos, obtive-se então os valores de Permissividade elétrica e Tangentes de perdas, em sequência foi realizada a caracterização das propriedades têxteis de Título, Gramatura, Estabilidade Dimensional e Resistência a tração, com base nos dados obtidos no processo de caracterização se elegeu dois tecidos com propriedades favoráveis ao projeto, modelagem e construção das antenas têxteis. Após a seleção dos tecidos foram feitas simulações no Ansys HFSS® (High Frequency Strucutural Simulator) para obtenção dos parâmetros de Perda de retorno, Diagrama de radiação, Densidade de corrente, Impedância, Ganho e VSWR, além da otimização dimensional das antenas. Foram simuladas duas antenas CPW, uma em substrato têxtil feito de fibras de Proteína de Soja (SPF) e outra com fibras de Polipropileno com Ácido Polilático de Milho (PP+PLA). Com base nas simulações foram construídas duas antenas com os respectivos substratos têxteis e utilizando um analisador de redes vetoriais foram medidos a perda de retorno e a impedância, mostrada por meio da Carta de Smith. Ambas apresentaram uma perda de retorno abaixo de -10 dB para frequência central de projeto e uma alta largura de banda. Foi realizada a comparação dos resultados simulados e os efetivamente medidos, analisando-os de acordo com a literatura especializada na área. Mostrando a viabilidade do desenvolvimento de antenas CPW em tecidos de malha para sistemas RFID ativos, além da possibilidade da interoperabilidade em sistemas de comunicação por Internet das coisas, Internet of Things, IoT
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Bibo, Gary Andrew. "Deformation and fracture of non-crimp fabric composites." Thesis, Queen Mary, University of London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362878.
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Isaia, Cristina. "Characterisation of knitted conductive textiles for wearable motion sensor applications." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/55329/.
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Combining stainless steel with polyester fibres adds an attractive conductive behaviour to the yarn. Once knitted in such a manner, fabrics develop sensing properties that make them suitable for wearable applications as a consequence of the variation of their conductivity when subject to structural deformations. The use of such textiles as accurate strain/motion sensors can be considered the new frontier in wearable sensor applications, in opposition to their use as simple strain/motion detectors as mainly done until now. This thesis aims to characterise the electrical properties of knitted conductive textiles made of 20% stainless steel and 80% polyester fibres in the context of their application as fabric strain sensors. However, the use of conductive textiles as sensors is challenging and requires the combined study of their electrical and mechanical behaviours. In the first part of this thesis, the fabric resistance variation is analysed with a purposely built measurement system during a considerable number of stretch-recovery cycles performed by an Instron tensile machine. From the resulting electrical characterisation, it is possible to select the best knit pattern candidates for the second part of the study, which regards their integration into a supporting garment and further investigation of their electrical and mechanical properties in view of their application as wearable motion sensors. Two acquisition systems capture both free and constrained motions of a participant's knee and the electrical resistance variation due to combined deformation of samples and supporting leggings. In both parts of this thesis, a detailed analysis in terms of linearity, stability, sensitivity and hysteresis confirms that the overall sensing performance progressively decreases during extended use as a consequence of the short-term irreversible fabric deformation and does not significantly recover after short rest periods. For the development and use of high performance fabric-based strain sensors, it is therefore evident the importance of the long-term maintaining of a reversible stretch-recovery behaviour not only of the sensing fabrics but also of the supporting garments they are integrated in.
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Zhuo, Nai-Jian. "Production and properties of weft-inserted warp knitted fabrics." Thesis, University of Leeds, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235814.
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Soong, Sze Su. "An investigation into the knittability of weft knitted fabrics." Thesis, University of Leeds, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329205.
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Primentas, Anthony. "Mechanical methods for the reduction of spirality in weft knitted fabrics." Thesis, University of Leeds, 1995. http://etheses.whiterose.ac.uk/11257/.
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A mechanical method for reducing the spirality of single jersey tubular weft knitted fabrics is described. Initial attempts, using a false twisting device, did not prove successful. A later, successful method was developed, based on changes in yarn torque produced by a steaming and untwisting method. The new method is shown to be very effective in reducing spirality. Microscopic examination of changes in yarn structure, including characteristics of fibre migration have also been carried out.
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Van, Der Merwe J. P. "The effect of fibre physical properties on woollen spun yarn and plain knitted fabric properties." Thesis, Open University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.354894.
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Husain, Muhammad Dawood. "Development of temperature sensing fabric." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/development-of-temperature-sensing-fabric(0e5e8367-c3b2-4cff-bcc9-f32fac97b50f).html.
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Human body temperature is an important indicator of physical performance and condition in terms of comfort, heat or cold stress. The aim of this research was to develop Temperature Sensing Fabric (TSF) for continuous temperature measurement in healthcare applications. The study covers the development and manufacture of TSF by embedding fine metallic wire into the structure of textile material using a commercial computerised knitting machine. The operational principle of TSF is based on the inherent propensity of a metal wire to respond to changes in temperature with variation in its electrical resistance. Over 60 TSF samples were developed with combinations of different sensing elements, two inlay densities and highly textured polyester yarn as the base material. TSF samples were created using either bare or insulated wires with a range of diameters from 50 to 150 μm and metal wires of nickel, copper, tungsten, and nickel coated copper. In order to investigate the Temperature-Resistance (T-R) relationship of TSF samples for calibration purposes, a customised test rig was developed and monitoring software was created in the LabVIEW environment, to record the temperature and resistance signals simultaneously. TSF samples were tested in various thermal environments, under laboratory conditions and in practical wear trials, to analyse the relationship between the temperature and resistance of the sensing fabric and to develop base line specifications such as sensitivity, resistance ratio, precision, nominal resistance, and response time; the influence of external parameters such as humidity and strain were also monitored. The regression uncertainty was found to be less than in ±0.1°C; the repeatability uncertainty was found to be less than ±0.5°C; the manufacturing uncertainty in terms of nominal resistance was found to be ± 2% from its mean. The experimental T-R relationship of TSF was validated by modelling in the thermo-electrical domain in both steady and transient states. A maximum error of 0.2°C was found between the experimental and modelled T-R relationships. TSF samples made with bare wire sensing elements showed slight variations in their resistance during strain tests, however, samples made with insulated sensing elements did not demonstrate any detectable strain-dependent-resistance error. The overall thermal response of TSF was found to be affected by basal fabric thickness and mass; the effect of RH was not found to be significant. TSF samples with higher-resistance sensing elements performed better than lower-resistance types. Furthermore, TSF samples made using insulated wire were more straightforward to manufacture because of their increased tensile strength and exhibited better sensing performance than samples made with bare wire. In all the human body wear trials, under steady-state and dynamic conditions both sensors followed the same trends and exhibited similar movement artifacts. When layers of clothing were worn over the sensors, the difference between the response of the TSF and a high-precision reference temperature were reduced by the improved isothermal conditions near the measurement site.
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Persson, Anna. "Knitted Circuits for Visual and Tactile Interactive Expressions." Licentiate thesis, Högskolan i Borås, Institutionen Textilhögskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-3519.
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As computational technology and new materials are entering the world of textiles, our view on the textile material is challenged; the areas of textiledesign and interaction design start to merge. Designing interactive textiles means communicating new expressional forms through textile material. This thesis aim to contribute to the exploration of designing interactive knitted textiles with focus on linking interactive properties, especially visual and tactile, to different ways of expressing them. Design examples and experiments presented are meant to show new possibilities for designing textile material able to change structure, colour and temperaturein different ways in response to environmental stimuli. As a way of presenting, and reflecting on, these interactive properties, a notion of expression diagrams is introduced.Photographs on pages 36, 37, 40, by Lars Hallnäs.
Other photographs by the authors and participants in the projects.
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Cassidy, Carol. "An investigation of the mechanical and surface properties of weft knitted fabrics and their influence on sewability during garment assembly." Thesis, De Montfort University, 2002. http://hdl.handle.net/2086/4247.
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Lampitt, Adey Katherine Mary. "Knitting identities : creativity and community amongst women hand knitters in Edinburgh." Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/20467.
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This thesis explores how women form, perceive and communicate their sense of identity by hand knitting for leisure. Leisure, defined here as time outside of work or caring responsibilities, was selected as the focus of this research because women have some choice over how they spend this time and express themselves. Writing on contemporary knitting has tended to frame knitting within political, artistic or commercial contexts (such as Black, 2005, 2012 and Elliot, 2015). This leaves a gap in our understanding of why women who knit for leisure do so. This is partially addressed by recent empirical research (for example Fields, 2014) that has studied social processes within knitting groups. However, research has devoted less attention to the wider motivations of women who knit alone or in groups. This is important if we consider that identity formation happens in a broader context, and may involve a constant interaction with people (Jenkins, 2004), objects and ideas, as is suggested by the findings of this study. The research employs a qualitative approach based on Charmaz’s (2006) grounded theory by way of a staged design which aims to respond to the data and minimise the influence of preconceived ideas. This aim is particularly important given the historical and contemporary stereotypes associated with knitting, and my own background as a textile historian and maker. Application of social research methods also aims to further develop the role played by empirical research in the area of textile scholarship. Data was collected in three stages; a pilot study, questionnaires with women textile bloggers and the main research stage which consisted of semi-structured interviews with knitters living in Edinburgh. Interviewees were contacted by volunteer and snowball sampling. Content analysis was supported by QSR*NVivo and involved descriptive and theoretical coding in order to identify themes in the data. Analysis suggests knitting provides immediate social interaction and support. This could be associated with Jenkins’ (2004) proposition that identity is formed by ongoing social interaction. However, there is another dimension here as knitting also enables the solitary knitter to access interactions with ideas and other people through objects and the personal memories held within them as well as through online communities. Three key findings are that knitting presents a way to be creative, productive and social. Firstly, respondents describe knitting as a balance between challenge and perceived ability, as might be described as ‘flow’ (Csikszentmihalyi, 2002 [1992]). Secondly, this meets a need for a leisure activity that produces a tangible manifestation of effort and skill. However, the process of knitting is also seen to be as important, if not more so, than the final product. This insight reinforces the usefulness of empirical study of the experience of making textiles, and reveals additional data than studying only the final object. Thirdly, knitting is presented as a means to access meaningful social interactions and a sense of belonging to a community whether or not the knitter is a member of a knitting group. Such interactions might be online or provide a sense of continuity with previous generations of knitters in their families or women in general. Knitters see this as a way of building social capital and support. Overall, findings suggest that identity formation and communication should be seen as a complex process that does not only involve direct social interactions but interaction with the idea of other knitters, past and present, and the practical experience of making.
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Tissot, François. "Contribution à la caractérisation mécanique et à la modélisation des tricots de Nickel-Titane." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAI056/document.
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Le tricotage est une technique d'obtention de textiles ancestrale qui est encore couramment utilisée de nos jours. Cette technique permet de produire des textiles possédant une forte déformation élastique, un comportement mécanique anisotrope modifiable simplement en jouant sur la géométrie de la maille, la possibilité d'obtenir des formes générales (préformes) ou internes (trous) durant le procédé de fabrication, rendant ces textiles particulièrement attractifs et rentables. Plus récemment, l’utilisation des alliages à mémoire de forme (AMF), en particulier de fils de Nickel-Titane (Ni-Ti), pour produire ces tricots a permis de proposer des textiles aux fonctionnalités nouvelles, telles qu'une très grande déformation élastique, un changement de forme sous l'effet d'un échauffement, une forte capacité d’amortissement, etc.Cependant, le comportement mécanique de tels tricots AMF reste encore assez mal connu, et bien qu'un certain nombre d'études aient déjà été proposées dans la littérature concernant la caractérisation du comportement mécanique de ces tricots, l'application aux tricots NiTi reste insuffisamment faite.Dans ce travail, un ensemble d’outils expérimentaux et numériques a été mis en place pour étudier la déformation des tricots NiTi, en particulier pour évaluer l'influence des paramètres matériaux, géométrie, frottements, etc., sur le comportement mécanique. Un montage expérimental a été développé pour caractériser le textile en traction biaxiale. Il s'inspire des techniques utilisées pour les membranes souples visant à obtenir un champ de déformation le plus uniforme possible dans la zone déformée. De plus, sa conception ainsi qu’un programme de traitement d'images permettent la mesure de la distribution des efforts aux frontières ainsi que la mesure de la morphologie des mailles du tricot au cours de la déformation.Le comportement mécanique du tricot a été modélisé par homogénéisation numérique en réalisant des simulations numériques par éléments finis sur une maille représentative sous conditions périodiques. Les prédictions des simulations sont validées en regard des résultats expérimentaux obtenus sur les tricots NiTi, en traction simple et traction biaxiale suivant les directions chaine et trame. Elles sont ensuite utilisées pour analyser l'importance des différents mécanismes de déformation en fonction de la sollicitation étudiéeKnitting is an ancestral textile manufacturing technique which is still commonly used nowadays. This method allows to manufacture textiles possessing high recoverable strains, an anisotropic mechanical behavior easily tuned by varying the knit loop dimensions, the ability to obtain general forms (preforms) or internal forms (holes) during the manufacturing process, and more, making those textiles particularly attractive and cost-efficient. More recently, the use of Shape Memory Alloys (SMA), notably Nickel-Titanium (Ni-Ti) wires, for producing those textiles allowed to propose textiles with new functional properties, such as very high recoverable strains, shape-shifting effects under temperature changes, high damping capacity, etc.However, such SMA knitted textiles mechanical behavior remains relatively unknown, and even if a certain number of studies have dealt with the knitted textiles mechanical characterization, the application to NiTi knitted textiles remains insufficiently done.In this work, a set of experimental and numerical tools have been developed to study knitted NiTi textiles deformation, especially to evaluate the influence of material parameters, knit geometry, friction, etc., on the mechanical behavior. An experimental setup has been developed to characterize such textiles in biaxial tension. It is inspired by methods developed for soft membranes aiming at obtaining strain fields as uniform as possible in the sample working area. Furthermore, its conception as well as a dedicated image processing software allow measuring boundary forces distributions and knit loops morphology during deformation.The knitted textile mechanical behavior has been modeled using numerical homogenization method by performing finite elements numerical simulation of a representative knit loop under periodic conditions. Simulations predictions are validated in regard to experimental results obtained on knitted NiTi textiles, in simple tension and biaxial tension in course and wale directions. They are then used to analyze the importance of different deformation mechanisms depending on the loading case studied
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Brobeck, Caroline, and Elin Westblom. "Solblockerande textilier : Optimering av solskydd." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-22094.
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extilindustrin måste ständigt söka nya alternativ inom beläggningar och laminering för att minska den skadliga miljöpåverkan. En fråga som uppkommit är om beläggningar används i större utsträckning än vad som egentligen behövs. Denna kandidatuppsats har skrivits i samarbete med Artex AB och kretsar kring ett befintligt solskydd och solens ljusspektrum som består av strålar mellan 320–2500 nm. Material som bestrålas kan antingen absorbera, reflektera eller transmittera dessa strålar. Strålarnas alternativa vägar adderat med varandra blir alltid hundra procent, vilket innebär att genom att öka den reflekterande förmågan minskas de andra två tillstånden. I denna studie granskas den totala reflekterande förmågan av ljusspektrumet hos textila material som i sin tur beror på många olika faktorer. Det undersöks även om det är ett steg i fel riktning att använda sig av beläggningar för att nå ett bättre högreflekterande material. Detta även för att minska miljöbelastningen. Eftersom beläggningar generellt förstyvar material är detta kontraproduktivt när man vill bibehålla följsamheten hos en tygvara, vilket är avgörande för denna typ av produkt. Skrynkelheten går nämligen hand i hand med tygvarans då stumma yta. Detta projekt fokuserar på solskydd som ska användas inifrån en bil. Syftet med studien var alltså att undersöka om en obelagd vit och tät tygvara kan uppnå tillräcklig funktion för ett solskydd innanför en bil. I experimenten användes fyra olika tygvaror med olika strukturer i bindningarna för att göra en så omfattande studie som möjligt. Dessa fyra var: en satin, en varptrikå och två stycken tvåskaft, varav den ena glesare och mer matt än den andra. Respektive tygvara beströks med ett färgpigment för att analysera om kombinationen mellan reflektion och elastisk potential var möjlig. Tester som genomförts i denna undersökning var: bestämning av färghärdighet, total reflektion, ljustransmittansmätning och ett egenkomponerat skrynkeltest. Vidare granskades dess skillnader för att undersöka om ett vitt material kunde ge en bättre totalreflektion, men även för att bevisa att en tygvaras konstruktion kan erhålla följsamheten även om en beläggning är nödvändig. Mätvärdena granskades för att sedan jämföra, först med varandra och sedan mot ett referensprov som kommer från en befintlig produkt som författarna fick att tillgå från Artex AB. En trikåvaras elastiska förmåga visade sig kunna bibehållas trots ett belagt ytskikt, och visade även på bra totalreflektion. Denna varptrikå uppvisade, tillsammans med satinen, på bra totalreflektion då de var obelagda och hade god följsamhet. I test om totalreflektion visades det att en vit tät tygvara reflekterade större procent än en belagd tygvara i det synliga ljusets spektrum. För att kunna dra slutsatser om ett vitt obelagt tyg med dessa konstruktioner (satin och varptrikå) hade varit bättre för ett solskydd hade vidare undrsökningar behövts göras. Detta för att se hur mycket av den totala reaktionen som är diffus respektive spekulärThe textile industry must always find ways to reinvent itself and look for alternative options, as the coating and lamination industries are vital for a better environment. A question that needs answering is if coating on textiles are used more than needed. This bachelor thesis is written in cooperation with Artex AB and revolves around the suns light spectrum that consists of rays of 320 to 2500 nm. Materials that irradiate can either absorb, reflect or transmit these wavelengths. The rays alternative routes added with each other is always one hundred percent, which means that through increasing the reflecting capacity the other two will decrease. The most interesting part of this study, was to examine the ability of the light spectrum for material, and take in to consideration it’s construction, structure and color. Textile materials are often coated to add qualities and, in this case, to increase reflecting quality. This study is trying to prove, that it's a step in the wrong direction when it comes to the functionality of a sunshade product and for a reduced impact on the environment. As coating generally stiffens materials it’s contuerproductive with regards to keeping the resilience for the fabric, which is decisive for this type of product. The wrinkles go hand in hand with the fabrics coated surface. Since this project focuses on an existing sunshade product that will be used inside of a car, the heat radiation and the undulations within a certain wavelength that requires reflection will be focused on. The purpose with the study was to examine if an uncoated white fabric can achieve the same function in a sunshade as the current fabric in the product. In the experiments, four fabrics with different structures were used to complete such a comprehensive study as possible. These four fabrics were: one satin, one warp knitted and two plain weave, where one of them was more faint and sparse than the other. Each fabric was coated with a color pigment to analyze the possibilities of a high reflective material that still has elastic potential. The tests that were made was: determination of color fastness, total reflection, light transmit and a wrinkle test. Further on these differences were reviewed, and then concluded that the coating, in hope of increasing the reflection, is negligible. But also, to prove that a fabrics construction can keep its resilience even with a coated surface. These values have been reviewed and then compared with each other and against a reference fabric that the writers took part of from Artex AB. A warp knitted fabric was able to maintain its elastic ability regardless of a coated surface, and also shows good total reflection. This warp knitted fabric showed, together with the satin, good total reflection when they were uncoated and had good resilience. In this test for total reflection, it was proven that a white dense fabric reflects better than a coated fabric in the visible spectra of light. To be able to conclude if a white uncoated fabric with these constructions (satin and warp knitting) would be more useful for a sunshade, further studies had to be made, to see how much of the total reaction that is diffuse and specular.
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MATTSSON, ELISABETH. "Tidsmässig effektivitet vid produktion av ett plagg i finstickad trikå." Thesis, Högskolan i Borås, Institutionen Textilhögskolan, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-18033.
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Textilindustrin är en industri som ständigt växer och utvecklas. År 1995 introducerade det japanska företaget Shima Seiki den första maskinen med de tekniska egenskaperna, som gjorde det möjligt att producera ett trikåplagg med complete garment teknik. Denna introduktion revolutionerade tillverkningstekniken för dessa plagg. Denna studie har skrivits som ett examensarbete på kandidatnivå inom Textilingenjörsprogrammets avslutande del på Högskolan i Borås. Studiens huvudsakliga syfte var att undersöka vilket produktionssätt som var mest effektivt tidsmässigt vid produktion av ett plagg i finstickad trikå, ur ett supply chain perspektiv. Två olika tillverkningsmetoder valdes ut, konventionell och complete garment. Jämförelsen baserades på tidsbedömning av tillverkningsmetodernas supply chain som undersöktes med hjälp av en värdeflödesanalys. Plagget som valdes ut var en tröja, i finstickad trikå, och utifrån detta utfördes en litteraturstudie med fokus på olika produktionsmetoder och logistik. Med utgångspunkt i litteraturstudien upprättades två varianter av varuflöden till de olika tillverkningsmetoderna. En tidsstudie utfördes grundat på de två olika varuflödena, som baserades på egna studier i kombination med intervjuer av experter inom området. Sammanställning av tidsstudien och värdeflödesanalysen visade att det fanns för- och nackdelar med de båda tillverkningsmetoderna. En nackdel som framkom var non-value-added faktorerna väntetid och planering inför produktion, som visade sig vara svåra att undvika i de båda tillverkningsmetoderna. Fördelarna var att de non-value-added faktorerna i complete garment tillverkningens supply chain kunde kortas ner. Efter analys av vilka krav som ställdes, på non-value-added faktorerna för varuflödet hos respektive tillverkningsmetod, kunde slutsatsen dras att complete garment tillverkningens varuflöde är att föredra om man ville ha en snabb påfyllnad av varor till butik utan att ha varorna på lager.Program: Textilingenjörsutbildningen
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Holanda, Samanta Mesquita de. "Estudo e desenvolvimento de antenas de microfita utilizando tecido de malha a base de fibras têxteis compostas." Universidade Federal Rural do Semi-Árido, 2016. http://bdtd.ufersa.edu.br:80/tede/handle/tede/751.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
The growing development of telecommunications, especially mobile devices, has intensified related searches the microstrip antennas in recent years since they have unique properties and wide range of applications. The constant demand for lighter and more flexible devices boosted research in wearable technology area where electronics are fully embedded in their fibers. In this context, knitted fabrics have the necessary elasticity to create adaptable and sports parts, enabling high mobility and comfort to its users. The textile antennas are malleable and, therefore, have great utility in applications where rigidity of traditional antennas is considered limiting, as in military use clothing and in the biomedical field. This work aims to study and develop microstrip antennas using knitted fabric based composite fibers, showing the procedures and materials used from the characterization and choice of fabrics to the design, manufacture and testing of the textile antenna. The electrical characterization was carried out using a Vector Network Analyzer (ARV) to obtain the electrical properties (permittivity and tangent losses). Obtaining textile properties (weight, dimensional stability, degree and tensile strength) was made in accordance with the technical standards, using the equipment available at the Department of Textile Engineering at the Federal University of Rio Grande do Norte (UFRN). The antenna has been designed using the transmission line model of Fortran program developed in accordance with the electrical properties of textile substrates. Subsequently the antenna was designed and simulated in HFSS® (High Frequency Structural Simulator), where radiation patterns are obtained, return loss, the Smith chart, current density and gain. The best simulated result was implemented with tissue disposed knitted in a three-layer structure according to the dimensions designed, and then the antenna is tested using a spectrum analyzer, which were collected data that allowed the manufacture of the letter Smith and graph of return loss. The experimental data were compared with the simulated and the results analyzed according to the literature that support this paper
O crescente desenvolvimento das telecomunicações, principalmente a de dispositivos móveis, têm intensificado as pesquisas relacionadas as antenas de microfita nos últimos anos, visto que estas possuem propriedades singulares, bem como vasta gama de aplicações. A constante procura por dispositivos mais leves e flexíveis impulsionou as pesquisas na área de tecnologia vestível, onde componentes eletrônicos são inteiramente embutidos em suas fibras têxteis. Nesse contexto, os tecidos malha possuem a elasticidade necessária para criar peças adaptáveis e esportivas, permitindo alta mobilidade e conforto aos seus usuários. As antenas têxteis são maleáveis e, por essa razão, têm grande utilidade em aplicações onde a rigidez das antenas tradicionais é considerada uma limitação, como em roupas de uso militar e na área biomédica. Este trabalho tem como objetivo estudar e desenvolver antenas de microfita utilizando tecido de malha à base de fibras têxteis compostas, mostrando os procedimentos e materiais utilizados desde a caracterização e escolha dos tecidos até o projeto, confecção e testes da antena têxtil. A caracterização elétrica foi realizada através de um Analisador de Redes Vetorial (ARV) para obtenção das propriedades elétricas (permissividade e tangente de perdas). A obtenção das propriedades têxteis (gramatura, estabilidade dimensional, titulação e resistência a tração) foi feita de acordo com as normas técnicas, utilizando os equipamentos disponíveis no Departamento de Engenharia Têxtil da Universidade Federal do Rio Grande do Norte (UFRN). A antena foi dimensionada através do modelo da linha de transmissão em programa desenvolvido na linguagem Fortran de acordo com as propriedades elétricas dos substratos têxteis. Posteriormente a antena foi desenhada e simulada no HFSS® (High Frequency Structural Simulator), onde serão obtidos os diagramas de radiação, perda de retorno, densidade de corrente e ganho. O melhor resultado simulado foi implementado com o tecido de malha disposto numa estrutura de três camadas de acordo com as dimensões projetadas e, em seguida, a antena foi testada através de um analisador de espectro, onde foram coletados dados que permitiram a confecção da carta de Smith e gráfico da perda de retorno. Os dados experimentais foram comparados com os simulados e, os resultados analisados de acordo com a literatura especializada que embasam este trabalho
2017-07-06
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Dao, Thi Chinh Thuy. "Élaboration de texticaments à visée antiinflammatoire contenant des microcapsules respectueuses de l’environnement." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1025/document.
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L'utilisation des microcapsules fabriquées à partir de matériaux respectueux de l'environnement pour des applications textiles médicales a été étudiée et développée fortement au cours des dernières années. Le but de cette thèse est d'élaborer les textiles anti-inflammatoires à base de microcapsules respectueuses de l'environnement, utilisant trois types de matériaux textiles (coton, peco 65/35 et polyester) et cinq niveaux de longueur de boucle (2.81, 2.83, 2.87, 2,96 et 3,05 mm) sur étoffes tricotées à verrouillage de coton (nombre de fils Ne40). Les influences de la concentration en saponine, de la vitesse d'agitation au cours de l'étape d'émulsification et du volume d'éthyle acétate ajouté à la phase aqueuse sur les caractéristiques des microcapsules ont été étudiées. L'étude a également étudié les effets du rapport massique du coton et de la longueur de boucle des étoffes tricotées sur la distribution des microcapsules, la capacité de chargement des microcapsules et la capacité de libération de l'ibuprofène des étoffes tricotées traités par microcapsules. Les microcapsules d'Eudragit RSPO contenant de l'ibuprofène ont été élaborées par la technique d'évaporation de solvant, en utilisant le tensioactif bio-sourcé quillaja saponine et le solvant non halogéné d'éthyle acétate. Les microcapsules obtenues présentaient les formes sphériques avec un diamètre d (0,5) de 21,5 μm, approprié pour les applications textiles. Il a été trouvé que, pour empêcher la déformation des microcapsules pendant la traitement du textile, la séchage doit être effectuée sous vide à 45 ° C. Lorsque le rapport de teneur en fibres de coton dans le tissu augmentait, la distribution des microcapsules était moins régulière, ce qui entraînait un taux de libération plus faible de l'ibuprofène à partir des étoffes tricotées traités aux microcapsules. En outre, lorsque la longueur de la boucle augmente, la capacité de chargement des microcapsules des étoffes tricotées traités augmente, la distribution des microcapsules sur le tissu devient moins régulière et la vitesse de libération de l'ibuprofène des tissus traités aux microcapsules diminue. De plus, l'augmentation de l'extension du étoffes tricotées a favorisé la libération d'ibuprofène à partir des étoffes tricotées traités par les microcapsules à travers la peau de porcThe use of the microcapsules made from eco-friendly materials for medical textile applications has been researched and developed strongly in recent years. The aim of this thesis is to elaborate the anti-inflammatory textiles basing on eco-friendly microcapsules,using three kinds of textile materials (cotton, peco 65/35 and polyester)and five levels of the loop length (2.81, 2.83, 2.87, 2.96 and 3.05 mm) on the cotton interlock knitted fabrics (yarn count Ne40). The influences of the saponin concentration, the stirring rate during the emulsification step and the volume of ethyl acetate added to the aqueous phase on the characteristics of the microcapsules were studied. The influence of condition in drying on microcapsule’s morphology was also investigated.The thesis also researched the effects of cotton mass ratio and loop length of fabric on the microcapsule distribution, the microcapsule loading capability and the release capability of ibuprofen from the microcapsule treated fabrics. The Eudragit RSPO microcapsules containing ibuprofen were successfully elaborated by solvent evaporation technique, using the bio-sourced surfactant quillajasaponin and the non-halogenated solvent ethyl acetate. The obtained microcapsules exhibited the spherical shapes with d(0.5) diameter of 21.5 m, suitable for the textile applications. It was found that in order to keep the microcapsules from deformation during the textile finishing, the drying stage should be carried out in vacuum at 45oC. When the content ratio of cotton fibers in the fabric increased,the microcapsule distribution was less even, resulting in the lower release rate of ibuprofen from the microcapsule-treated fabrics. Besides, when the loop length increased, the microcapsule loading capability of the treated fabrics increased, the microcapsule distribution on the fabric became less even and the release rate of ibuprofen from the microcapsule-treated fabrics decreased. Furthermore, increasing the fabric extension favored the release of ibuprofen from the microcapsule-treated fabrics through the pigskin
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Djerboua, Abdelbaki. "Développement et caractérisation d'un nouveau produit, non-tissé plissé 3D antichoc, insérable dans les vêtements pour la protection." Thesis, Mulhouse, 2018. http://www.theses.fr/2018MULH1460.
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Dans le cadre de cette recherche, nous avons étudié l'effet de divers paramètres d'influençant le comportement d’un non-tissé Vertilap®3D à faible impact. Ce matériau a été développé pour la protection du corps humain. Ce nouveau produit textile offre les meilleures solutions de résistance aux chocs à basse vitesse, pour combler le vide des produits concurrents sur le marché, dans le domaine de la protection individuelle. À cet égard, une nouvelle structure fibreuse tridimensionnelle (3D) en matériau polyester (PET) a été développée pour enrichir ou remplacer la gamme de produits de protection. Ces nouvelles structures fibreuses 3D fabriquées sont stratifiées avec des non-tissés aiguilletées et thermoliés. Les feuilles sont en 100% PET, pour obtenir un produit monocomposant. Pour la caractérisation des propriétés physiques et mécaniques de ces nouvelles structures fibreuses 3D, des méthodes d'essais doivent être développées. Sur la base des spécifications de protection du corps humain, une méthodologie a été mise en place pour tester le comportement à l’impact de ces nouveaux produits. Afin de répondre à la question des produits existants et de leur remplacement, certains produits en tricot chaine ont également été caractérisés, et des comparaisons avec d'autres produits ont été faites.Les résultats de cette étude montrent que les non-tissés Vertilap® peuvent être utilisés comme un matériau efficace pour la protection du corps humain contre les chocs en raison de leur grande capacité d'absorption d'énergie à différents stades d'impact. Les non-tissés 3D Vertilap® étudiés permettent de réduire d'environ 44% la profondeur de déformation et de 70% le volume de déformation en fonction du diamètre de l'impacteur et de l'énergie à l’impact.Les propriétés de la nouvelle structure fibreuse 3D sont intéressantes en termes de comportement d'impact par rapport aux tricots chaine. Ces résultats sont des informations importantes pour la conception de Vertilap® pour des applications d'amortissement et de protection dans les vêtements de protection et les semelles de chaussures, etc.Il y a deux volets de ce travail dans cette thèse. Le premier volet de ce travail présente la partie de recherche bibliographique et le deuxième volet à ce travail est basé sur la caractérisation du comportement et les performances à l’impact de la nouvelle structure Vertilap®.Ces performances seront étudiées, par deux méthodes spécialement développées dans le cadre de ces travaux en premier lieu, et puis une étude comparative, entre cette nouvelle structure fibreuse et un autre produit connu sur le marché par sa capacité de protection, sera menée en deuxième lieux, afin de positionner les performances de ce nouveau produit en termes d eprotection humaineAs part of this research, we investigated the effect of various influence parameters on low-impact Vertilap® non-woven behavior. This material has been developped for the protection of the human body. This new textile product offers the best low-speed impact resistance solutions to fill the gap of competing products on the market, in the field of personal protection. In this respect, a new three-dimensional (3D) fibrous structure made of polyester (PET) material has been developed to enrich or replace the range of protective products. These new 3D fabricated fibrous structures are laminated with needled and spunbonded sheets. The leaves are 100%PET, to obtain a single-component product. Characterization of the physical and mechanical properties of these new 3D fibrous structures, test methods must be developed. Based on human body protection specifications, a methodology has been put in place to test the impact behavior of these new products. In order to answer the replacement question, typical warp knit products were also characterized, and comparisons with other products were made.The results of this study show that Vertilap® nonwovens can be used as an effective material for the protection of the human body because of their high energy absorption capacity at different stages of impact. The studied Vertilap® non-wovens reduce the deformation depth by approximately 44% and the deformation volume by 70% depending on the impact or diameter and the impact energy. The properties of the new 3D fibrous structure are interesting in terms of impact behavior compared to knitted warp fabrics. These results are important requirements for the design of Vertilap® for cushioning and protection applications in protective clothing, shoe soles, etc.There are two parts in this thesis. The first part of the work presents the bibliographic research part and the second part of the work is based on characterization of the behavior and impact performance of the new Vertilap® structure. These performances will be studied, by two methods specially developed as part of this work in the first place, and then a comparative study between this new fibrous structure and another product known on the market, by its protection capacity will be conducted in second place, to position performance in terms of human protection
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Cai, Chunyuan Nied Herman F. "Thermoforming knitted fabrics reinforced composites." 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1469560.
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Tseng, Yung-Yuan, and 曾泳源. "Warm-Keeping Effect of Textile Knitted by Nanoparticle-Contained Fabric." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/56597127834568178612.
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碩士國立雲林科技大學
機械工程系碩士班
94
In recent years ,there are various applications of nanotechnology to improve textile warm-keeping ability, but the theory has not been studied completely yet. This study aims at the bio-ceramics fabric warm-keeping principle and explains this phenomenon by the energy exchange in the micro-scale to set up a model can extend its application.
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"How to improve the production lead time of knitted fabrics for company X." Chinese University of Hong Kong, 1991. http://library.cuhk.edu.hk/record=b5888627.
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by Yang Ming-Yen Teresa.Thesis (M.B.A.)--Chinese University of Hong Kong, 1991.
Includes bibliographical references (leave 61).
ABSTRACT --- p.ii
ACKNOWLEDGEMENTS --- p.iii
TABLE OF CONTENTS --- p.iv
LIST OF ILLUSTRATIONS --- p.vi
LIST OF TABLES --- p.vii
Chapter I. --- Introduction --- p.1
Company Background --- p.6
Chapter II. --- Methodology --- p.9
Chapter III. --- Analysis of the Existing System --- p.10
Piecegoods Purchase Order System --- p.10
Physical Flow --- p.17
Yarn Dyeing --- p.24
Knitting --- p.26
Piece Dyeing --- p.26
Finishing --- p.30
Final Inspection --- p.32
Transit Time --- p.35
Chapter IV. --- Identification of Major Problem Areas --- p.38
Documentation Flow --- p.38
Physical Flow --- p.40
Feasibility of the Target Lead Time --- p.41
Feasibility of the Target --- p.42
Production Capacity
Identification of the Problem Areas --- p.44
Chapter V. --- Recommendations To Improve the Lead Time --- p.50
Measurements --- p.50
Skills --- p.51
Communication --- p.54
Decision Process --- p.56
Management Support --- p.57
Appendix --- p.60
Bibliography --- p.61
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Chen, Jung-Chu, and 陳蓉茱. "A Study on Strain-Resistance Variation of Conductive Knitted Fabric— An Application of a Textile Sound Controller." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/87191154417924700547.
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碩士樹德科技大學
應用設計研究所
96
With rapid advances in modern technologies, textiles nowadays are already transformed from traditional ones into functional ones which passively react to environmental changes (such as keeping warm, deodorization, moisture absorption, and sweat-shifting) and put emphasis on health and recreation as well as personalization. This study takes “sound” as the medium between human beings and textiles, and interactions are hoped to be achieved through sound variation created by body activities. In terms of experiments, the first stage is to conduct an initial stress-resistance test with the knitted fabrics made of conductive fiber yarns; the second stage is streth tests on single threads of conductive fiber yarns, streth tests of double rings of conductive fiber yarns, and repeated stretch test of conductive knitted fabrics; and the third stage is a sound controller test by conductive knitted fabric. Based on those experiments, the conclusions are as follows: （a）The result of stretch tests on conductive fiber yarns show that the longer the stretching length is, the higher the resistance value tends to be. Moreover, the strain-resistance variation of conductive yarns tends to be nonlinear exponential. （b）The result of stretch tests on double rings of conductive fiber yarns show that with the initial stretching length of 2mm, the resistance value tends to decrease due to the lower contact resistance between two stretching yarn rings. With an increase in the stretching length, the longer the stretching length is, the higher the resistance value tends to be. （c）The result of repeated stretch tests on conductive knitted fabrics show that in terms of strain-resistance variation, the longer the stretching length is, the lower the resistance value tends to be; on the contrary, in terms of recovery-resistance variation, the shorter the stretching length is, the higher the resistance value tends to be. （d）Regarding the sound controller test by the conductive knitted fabrics, a sound-controlled glove model, which is an integration of the conductive knitted fabrics and a sound-controlled device, is used to conduct the test. The result shows that preset sound effects can be produced in accordance with corresponding hand motions. Thus, this test confirms the feasibility of applying the conductive knitted fabrics to electronic textile in the future.