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  • 1.
    Abtahi, Farhad
    et al.
    KTH-School of Technology and Health.
    Ji, Guangchao
    KTH-School of Technology and Health.
    Lu, Ke
    KTH-School of Technology and Health.
    Rödby, Kristian
    University of Borås, Faculty of Textiles, Engineering and Business.
    Björlin, Anders
    Kiwok AB.
    Östlund, Anders
    Kiwok AB.
    Seoane, Fernando
    University of Borås, Faculty of Caring Science, Work Life and Social Welfare. KTH-School of Technology and Health.
    Lindecrantz, Kaj
    KTH-School of Technology and Health.
    Textile-Electronic Integration in Wearable Measurement Garments for Pervasive Healthcare Monitoring2015Conference paper (Other academic)
  • 2.
    Abtahi, Farhad
    et al.
    KTH-School of Technology and Health.
    Lu, Ke
    KTH-School of Technology and Health.
    Guangchao, Li
    KTH-School of Technology and Health.
    Rödby, Kristian
    University of Borås, Faculty of Textiles, Engineering and Business.
    Seoane, Fernando
    University of Borås, Faculty of Caring Science, Work Life and Social Welfare. KTH-School of Technology and Health.
    A Knitted Garment using Intarsia Technique for Heart Rate Variability Biofeedback: Evaluation of Initial Prototype.2015Conference paper (Other academic)
  • 3.
    Agnhage, Tove
    University of Borås, Faculty of Textiles, Engineering and Business. University Lille 1, France; Soochow University, China.
    Eco-designed functionalization of polyester fabric2017Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    There is an increased awareness of the textile dyeing and finishing sector’s high impact on the environment due to high water consumption, polluted wastewater, and inefficient use of energy. To reduce environmental impacts, researchers propose the use of dyes from natural sources. The purpose of using these is to impart new attributes to textiles without compromising on environmental sustainability. The attributes given to the textile can be color and/or other characteristics. A drawback however, is that the use of bio-sourced dyes is not free from environmental concerns. Thus, it becomes paramount to assess the environmental impacts from using them and improve the environmental profile, but studies on this topic are generally absent.

    The research presented in this thesis has included environmental impact assessment, using the life cycle assessment (LCA) tool, in the design process of a multifunctional polyester (PET) fabric using natural anthraquinones. By doing so an eco-design approach has been applied, with the intention to pave the way towards eco-sustainable bio-functionalization of textiles.

    The anthraquinones were obtained from the root extracts of the madder plant (Rubia tinctorum L.), referred to as madder dye. The research questions were therefore formulated related to the use of madder dye. Three research questions have been answered: (I) Can madder dye serve as a multifunctional species onto a PET woven fabric? (II) How does the environmental profile of the dyeing process of PET with madder dye look like, and how can it be improved? (III) What are the main challenges in using LCA to assess the environmental impacts of textile dyeing with plant-based dyes?

    It is concluded that there is a potential for the madder dye to serve as a multifunctional species onto PET. Based on the encouraging result, a recommendation for future work would be to focus on the durability of the functionalities presented and their improvement potential, both in exhaustion dyeing and pad-dyeing. LCA driven process optimization of the exhaustion dyeing enabled improvement in every impact category studied. However, several challenges have been identified which need to be overcome for the LCA to contribute to the sustainable use of multifunctional plant-based species in textile dyeing. The main challenges are the lack of available data at the research stage and the interdisciplinary nature of the research arena. It is envisaged that if these challenges are addressed, LCA can contribute towards sustainable bio-functionalization of textiles. 

  • 4.
    Backe, Carin
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Skelte, Gabrielle
    University of Borås, Faculty of Textiles, Engineering and Business.
    Piezoelektriska filament: från garn till textil applikation2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Piezoelectric materials are frequently used in different sensors as they can generate a measurable electrical signal during applied pressure or when subjected to extension. This project examines how a piezoelectric yarn containing Polyvinylidene fluoride (PVDF) is affected when exposed to moisture, heat and long-term mechanical deformation. Focus has been directed towards investigating the properties of the piezoelectric yarn as well as how it can be applied in textile fabrics and textile applications. The piezoelectric yarn has been subjected to a series of tests. Most of the samples have undergone cyclic deformation in an extensometer during tests. The piezoelectric yarn has been examined by experiments in laboratory environment, practical tests in textile applications as well as by statistical analysis. It can be stated that factors such as moisture and temperature have influence on the piezoelectric effect of the yarn. Long-term tests reveal how the yarn displays a change in length while undergoing deformation, which contributes to the diminished signal strength of the yarn. The piezoelectric yarn can successfully be integrated in a piece of fabric by the means of sewing when using correct stitch- length, where higher stitch-length gives a higher signal output. The same method can be applied to construct a piezoelectric sensor used in a training sock. This project can conclude that parameters such as moisture, creep-behaviour and structural variation within the PVDF-filaments have a significant effect on the signal created by the piezoelectric yarn. The potential of the yarn as a sensor can be seen by successfully applying it to a textile structure as well as in a training sock that can monitor the fore and rear foot while running. It can be stated that much remains to be studied in this particular research area regarding piezoelectric filaments and yarns. Further research in the subject will lead to new innovative applications that can be of use in different parts of society, not to say the least in the area of medicine.

  • 5.
    Backe, Carin
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Skelte, Gabrielle
    University of Borås, Faculty of Textiles, Engineering and Business.
    Rundqvist, Karin
    University of Borås, Faculty of Textiles, Engineering and Business.
    Sandsjö, Leif
    University of Borås, Faculty of Caring Science, Work Life and Social Welfare.
    Persson, Nils-Krister
    University of Borås, Faculty of Textiles, Engineering and Business.
    Piezoelektriska strumpor för rörelsemonitorering - En känslighetsanalys2015In: Abstracts - Medicinteknikdagarna 2015, Svensk förening för medicinsk teknik och fysik , 2015, 60- p.Conference paper (Other academic)
  • 6.
    Baghaei, Behnaz
    University of Borås, Faculty of Textiles, Engineering and Business.
    Development of thermoplastic biocomposites based on aligned hybrid yarns for fast composite manufacturing2015Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    The interest in natural fibres as reinforcement for composite materials has been steadily increasing due to their attractive mechanical properties and the possibility of making more eco-friendly materials. Currently, various alternatives are being introduced for commercial applications, as fibres such as hemp, jute and flax exhibit properties, which make them appropriate for structural composite components. Biocomposites offer reductions in weight and cost and have less reliance on foreign oil resources, making them attractive. Several investigations have revealed that the full utilisation of fibre mechanical properties in the final composites can be exploited, provided an aligned fibre orientation is chosen. In fact, a major challenge for natural fibre reinforced composites is to achieve high mechanical performance at competitive prices. The use of commingled/hybrid yarns is one of the more promising methods for manufacturing structural thermoplastic composites.

    Commingled yarns of thermoplastic and reinforcing fibres offer a potential for cost-effective production of composite parts, thanks to reduced applied pressures and impregnation times during processing. Besides economic advantages, there is also direct control over fibre placements and ease of handling of fibres in yarn process. The yarn technologies provide homogenous distribution of reinforcing fibre and matrix. Variation in natural fibre properties has been a major problem facing composite manufacturers, compared to carbon and glass fibres that have well-defined production processes. This issue can be addressed by regenerated cellulose fibres. These fibres can be reproduced easily with high surface evenness and even quality, making it possible to get consistent results, which is not possible with natural fibres. Combination of natural and regenerated cellulose fibre brings together the best of both materials. The end result is a product with superior properties, which could not be obtained by the individual components.

    This thesis describes the development of aligned hybrid yarns with low fibre twist, for high performance natural (hemp) and man-made (Lyocell) cellulose fibre-reinforced biocomposites, suitable for use in structural or semi-structural applications. The properties of composites in terms of fibre orientation, off-axis angle and alkali treatment were investigated, focusing on determining void%, water absorption, mechanical and thermo-mechanical properties. The results show that combining hemp and Lyocell in PLA composite leads to the reduction of moisture absorption and can improve the mechanical properties. The mechanical properties of the composites were highly affected by the fibre direction. The alkali treatment on hemp fibre improved the mechanical properties of the composites.

  • 7.
    Berggren Torell, Viveka
    University of Borås, Swedish School of Textiles.
    "It must be a little more close fitting...: On football clothes' contributions to constructions of femininity2012Conference paper (Other academic)
  • 8.
    Berggren Torell, Viveka
    et al.
    University of Borås, Swedish School of Textiles.
    Knuts, Eva
    Soft, colorful and unique2012Conference paper (Other academic)
  • 9.
    Björk, Annika
    University of Borås, Faculty of Textiles, Engineering and Business.
    Inse mitt värde och behåll mig en stund till: Ett undersökande projekt i hållbar textildesign2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Recognise my value and keep me a while longer is an exploratory project in sustainable textile design. The focus is to explore possible design solutions that can give products a property transformation over time and prolong the products life cycle. This through practical investigations with different materials based on a chosen approach to sustainable design and changeable pattern images. Also with aim to give the consumer an active role in the changing of a products appearance and function. The end result is three product prototypes that all in different ways exemplify the chosen approach to sustainable design. 1. Moss is a jumper made of circular knitted jacquard fabric with the material combination Sally Fox cotton and unbleached cotton. The fabric is conformable and soft with a pattern that changes hue strength for each time the consumer washes it. The changing pattern makes the jumper interesting because it´s expression changes slowly while it´s being used. 2. Cone is a duvet and pillow cover that is made of a five shed satin jacquard weave. The textile pattern and colour is inverted on the back and front side of the textile. The aesthetic expression of the bed clothing can be renewed by the consumer through vegetable dyes. 3. Bark is a flat knitted, dubble relief, jacquard wool blanket. The blanket can be transformed by the consumer, through washing, and then get a new function as a rug. The textile goes from a soft, two-dimensional, flexible and somewhat fragile textile into a compact, three-dimensional durable textile.

  • 10.
    Christoffersson, Astrid
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Hammarlund, Emma
    University of Borås, Faculty of Textiles, Engineering and Business.
    PIEZOELEKTRISK TRYCKSENSOR: En undersökning om textil struktur och piezoelektricitet2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The aim of this project was to create a sensor in textile material which can register and recognize different kinds of pressure. A suitable method has been developed in order to scientifically investigate and evaluate the sensitivity of the prototypes. The prototypes have been produced with a computerized hand weave machine and the materials used were polyester and piezoelectric PVDF-fiber, twisted with a conductive yarn, Shieldex®. When a force is applied to the PVDF-fiber, causing an extension of the fiber, a voltage is generated directly related to the applied force. The final prototype is a woven textile with integrated monofilaments and weft inserted in seven different layers to create a voluminous structure. An extension by the PVDF-fiber is there by enabled to occur which is related to the force applied onto the structure.

    Three equable prototypes were produced, each consisting four separated PVDF-fibers which were inserted with a distance of 1, 5 cm from each other. The prototypes were further attached one by one on a homemade ramp and the PVDF- and Shieldex®-fibers were connected to an oscilloscope. Different weights were then rolled from the top of the ramp, generating a voltage each time it pressures a fiber, which were seen on the computer software of the oscilloscope. The results were afterwards analyzed and evaluated using Excel.

    A clear relationship between applied force and generated voltage is shown although there is a great variety among the test results on each weight along with large standard deviations. The exact weight generating a specific voltage is therefore difficult to determine.

  • 11. Ciera, L.
    et al.
    Beladjal, L.
    Almeras, X.
    Gheysens, T.
    Mertens, J.
    Nierstrasz, V.
    University of Borås, Swedish School of Textiles.
    Van Langenhove, L.
    A model system to study resistance of biological compounds to melt extrusion process parameters.2013In: Proceedings of the 13th AUTEX World Textile  Conference, Dresden, Germany May 22-24  2013., 2013Conference paper (Other academic)
  • 12.
    Dixdotter, Maja
    University of Borås, Faculty of Textiles, Engineering and Business.
    vemod(en): -A tribute to the perfect error.2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In this collection I have explored the paradox of perfection. The collection is an epic tribute to my prior self and discovers how the unperfect can be transformed to something, perceived, perfect. I flirt with my past obsessions in finding mathematically measured legs, exact tailored arms and perfectly fitted stockings. In a fun, poetic and melancholy way I invite the viewer on a highly visual voyage to my childhood where the obsession of finding costume perfection "Vemoden" the act of control becomes visual through statuesque frozen looks, where the previous unperfect becomes perfection.

  • 13.
    Dumitrescu, Delia
    University of Borås, Swedish School of Textiles.
    Relational Textiles2013Conference paper (Other academic)
    Abstract [en]

    The relationship between technology and the expression of form have always been interconnected in the architectural design process; associating the art of envisioning spaces with the craft of materializing them. Recently in terms of surface fabrication, computational tools of representation and material fabrication opened for architectural design new possibilities to explore novel spatial expressions. Surface design processes in architecture start to borrow from the logic of representation of different non-hierarchical structures, e.g., biological systems or textile construction techniques. Relating to that, the present fascination of textiles in architectural design relies on this specific way of building surface design as non-hierarchical form, and by that, allowing the designer to play with the depth of the surface design at micro and macro levels. Exploring different relations between digital and physical through textiles expressions, this research reassess static principles of form–marking the turn from static to relational principles. Thus, the intention is to describe how the character of the textiles and computation as design material redefines the notion of space trough surface aesthetics merging the digital to the physical, and how spatiality can be questioned through textile and interaction aesthetics. Using practice-based research methodology, this research opens and explores this design space by relating theory and practice; it questions and reframes fundamental concepts of expression and scale in architecture by proposing methods for surface design, and a specific language to describe textile architectural aesthetics.

  • 14.
    Dumitrescu, Delia
    et al.
    University of Borås, Swedish School of Textiles.
    Lundstedt, Lotta
    University of Borås, Swedish School of Textiles.
    Persson, Anna
    University of Borås, Swedish School of Textiles.
    Satomi, Mika
    University of Borås, Swedish School of Textiles.
    Repetition: interactive expressions of pattern translation2012In: Proceedings The Art of Research 2012, The art of research 2012 Making, Reflecting and understading, 28-29 November 2012 at Aalto University School of Arts, Design and Architecture Helsinki, Finland, 2012Conference paper (Refereed)
    Abstract [en]

    As a way of opening a space where methods from the fields of fashion design, textile design and interaction design overlap, the project Repetition intersects different methodologies through practice-based research in design. Experiments were conducted to explore ways of creating relationships between body and space by means of translating information as pattern design between garments and interactive knitted walls. By arranging a startup performance, we reflected on the expressional variables that influence the expression of the pattern translations; variables concerning the garments, the walls, the print and the movements were illustrated by the expressions found. The result formulates specific descriptions regarding accuracy and distribution of pattern translation, illustrating basic concepts of pattern formations identified in visual changes appearing in the garment. By communicating our understanding of basic expressions, Repetition aims to formulate a new framework for collaborative work as a method for further design.

  • 15.
    Eneh, Sandra
    University of Borås, Faculty of Textiles, Engineering and Business.
    Showroom the Future of Online Fashion Retailing 2.0: Enhancing the online shopping experience2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The following have been rectified in response to previous evaluation by examiner Olof Bruninge. -We have solely chosen qualitative methods in data collection and analysis by making use of data gathered from focus group workshop. The findings have been coded and analysed descriptively. -We have reformulated research questions and replaced the hypothesis with open questions. Allowing us to explore the participants’ behaviour rather than testing hypothesis. -All quantitative measures have been replaced with qualitative analysis and descriptions. -We have provided tables with results from focus group findings to increase transparency in our data

  • 16.
    Eriksson, Siw
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Sandsjö, Leif
    University of Borås, Faculty of Caring Science, Work Life and Social Welfare. MedTech West.
    Three-dimensional Fabrics as Medical Textiles2015In: Advances in 3D Textiles: A volume in Woodhead Publishing Series in Textiles / [ed] X. Chen, Woodhead Publishing Limited, 2015, 305-340 p.Chapter in book (Other academic)
    Abstract [en]

    The number of 3D textile applications in medicine is rapidly increasing as new technology and procedures are introduced in health care.  A first estimate of current medical applications of both general and 3D textiles is presented based on the medical devices classification system established by the US Food and Drug Administration. The textile specifics for these applications are covered from a textile technique perspective where the different 3D weaving as well as knitting, braiding and non-woven techniques are described and how their properties they can contribute in medical applications. In addition, emerging opportunities based on smart textiles as part of textile systems are described on a general level. The strong application areas of 3D medical textiles, i.e. wound management, vascular grafting and scaffolding for tissue engineering are covered in detail both from the medical and textiles perspective. Finally, some future lines of development are suggested and a short discussion on how new 3D textiles applications can be developed in close cooperation between the textile industry and the health care sector is presented.

  • 17.
    Guo, Li
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business. Smart textiles .
    Eriksson, Siw
    University of Borås, Faculty of Textiles, Engineering and Business.
    Sandsjö, Leif
    University of Borås, Faculty of Caring Science, Work Life and Social Welfare.
    3D Composite Textile Characteristics Relevant in Pressure Ulcer Management2015Conference paper (Refereed)
    Abstract [en]

    INTRODUCTION

    Effective ulcer management requires the wound to be in a moist but still breathable environment, to facilitate healing, absorb exudates and prevent maceration. One of the applicable methods to achieve this is the use of composite dressings. Most composite dressings are made of three layers to provide absorption and a bacterial barrier in a non- or semi-adherent cover. Various common textile materials such as cotton, polyester, polypropylene and cellulose can be used as different layers in those wound dressings. In addition to these established dressings, electrical stimulation therapy may be used in treating ulcers. It has been reported that electrical stimulation can reduce the area and depth of the wound in a shortened time compared to conventional treatment. In summary, encouraging wound healing results have been obtained both from using composite wound dressing and from applying of electrical stimulation. The aim of this study is to present a conceptual design based on a woven 3D structure that combines the composite wound dressing properties with electrical stimulation for pressure ulcers healing/management.

    METHOD

    In the suggested structure, different layers in X, Y and Z led were designed with different materials for different purposes.  The top layer consisting of a low-density web to provide a non-adherent layer combined with two textile electrodes made of conductive threads, the middle layer contributes pressure release and absorption of exudates, and the bottom layer next to the wound for moisture keeping while still allowing adequate ventilation.

    Two key properties were addressed in the study: pressure release and the possibility to provide electrical stimulation of the wound. Simulation with COMSOL Multiphysics was used to study pressure distribution according to Hertz contact theory. The surface resistance of the electrodes were also studied using in-house designed four-point measurement probes.

    RESULTS

    The simulation results show the composite structure to exhibit good pressure release properties. Surface resistance testing proved that the textile electrodes have resistance in the magnitude of 102 indicating that textile electrodes can be used for electrical stimulation in ulcers healing.

    The first results from this study demonstrate the feasibility to design a textile system combining established composite dressings solutions with means for electrical stimulation based on 3D weaving technique to be applied in pressure ulcer healing. 

  • 18.
    Hatamvand, Mohammad
    et al.
    Yazd University.
    Abbas Mirjalili, Seyed
    Yazd University.
    Fattahi, Saeid
    Yazd University.
    Bashir, Tariq
    Yazd University.
    Skrifvars, Mikael
    University of Borås, Faculty of Textiles, Engineering and Business.
    Optimum Drafting Conditions of Polyester and Viscose Blend Yarns2017In: AUTEX Research Journal, ISSN 1470-9589, E-ISSN 2300-0929Article in journal (Refereed)
    Abstract [en]

    In this study, we used an experimental design to investigate the  influence of the total draft, break draft, distance between the aprons (Clips) and production roller pressure on yarn quality in order to obtain optimum drafting conditions for polyester and viscose (PES/CV) blend yarns in ring spinning frame. We used PES fibers (1.4 dtex × 38 mm long) and CV fibers (1.6 dtex × 38 mm long) to spin a 20 Tex blend yarn of PES (70%)/CV (30%) blend ratio. When the break draft, adjustment of distance between of aprons and roller pressure is not reasonable, controlling and leading of the fibers is not sufficient for proper orientation of the fibers in the yarn structure to produce a high quality yarn. Experimental results and statistical analysis show that the best yarn quality will be obtained under drafting conditions total draft of 38, 1.2 break draft, 2.8 mm distance between of aprons and maximum pressure of the production top roller (18daN).

  • 19.
    Huang, Meiyuan
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Guu, Annie
    University of Borås, Faculty of Textiles, Engineering and Business.
    A study of consumer perception of a Chinese luxury fashion apparel brand in Sweden2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis investigates consumer perceptions of a Chinese luxury fashion brand in Sweden. The impact of nation brand image in terms of consumer buying behaviour and perception is examined by performing a case study of Shanghai Tang, comparing it to the American luxury fashion brand Ralph Lauren through the brands’ country of origin and brand history. Then a questionnaire is developed to analyse the luxury consumers’ perception of the Chinese brand Shanghai Tang and calculate the probability of customers purchasing luxury goods by Shanghai Tang. Finally, the future of Chinese luxury in Sweden will be discussed through an in-depth interview.

  • 20.
    Imtiaz, Asaad
    University of Borås, Faculty of Textiles, Engineering and Business.
    Business Expansion of Apparel Brands: Accessing opportunities in Apparel/Retail sector in Pakistan2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The current study aims to investigate the feasibility of international apparel and footwear retailers to expand their business in Pakistan and compete with other brands. It also highlights the business opportunities in Pakistan apparel retail sector and the motivations of international brands behind expansions. This study was conducted with the help of interviews based on diamond model of Porter, and Hofsetede cultural dimensions. The open ended questions were delivered to the professionals electronically while interviews were conducted by telephone. Seven companies from Pakistan were selected for study purpose. Data was analyzed and assessed manually. The study revealed that there is a significant opportunity for international apparel retailers to launch their retail outlets in Pakistan along with some risks. International brands which are financially strong can tackle these risks. However it was concluded that the companies with less financial strength may find it difficult to go in a new market within 5 years. UK brands are already there and brands from other countries are also opening. Overall Pakistan retail sector is growing and people are becoming fashion conscious. This study provides information to International apparel brands which they can take into consideration while entering Pakistan's apparel retail market. It also gives an opportunity for assessment of market in the light of theoretical modules and shows a direction of getting better market share by launching.

  • 21.
    Johansson, Matilda
    University of Borås, Faculty of Textiles, Engineering and Business.
    Repeated Stories: exploring storytelling for children in surface pattern design2015Independent thesis Basic level (degree of Bachelor), 12 credits / 18 HE creditsStudent thesis
    Abstract [en]

    Repeated Stories is an exploratory project in textile design where the aim is to explore the design of storytelling patterns addressed to children. More precisely, the work examines how patterns can be designed as a tool to encourage curiosity and creativity among children. The work is practice-based, building on concrete experiments with a workshop character, where combinations of textile material, colour, printing techniques and scale are explored. The primary motive for this work is to take advantage of textile design expertise in a social context, to find new areas for competence in making repeats and patterns, and how a social value can be added to patterns. The result is an installation of three hanging textiles, meant for a public space, such as waiting room in a hospital. The work proposes an alternative approach to surface patterns by adding storytelling and give the patterns both a communicative and decorative function.

  • 22.
    Kadi, Nawar
    University of Borås, Faculty of Textiles, Engineering and Business.
    Azari, Zitouni
    ENIM, France.
    Using the expert system to analyze loom performance2017In: Journal of the Textile Institute, ISSN 0040-5000, E-ISSN 1754-2340, Vol. 108Article in journal (Refereed)
  • 23.
    KADI, Nawar
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Skrifvars, Mikael
    University of Borås, Faculty of Textiles, Engineering and Business.
    Peterson, Joel
    University of Borås, Faculty of Textiles, Engineering and Business.
    Holmudd, Olle
    University of Borås, Faculty of Textiles, Engineering and Business.
    Karnoub, Amer
    University of Aleppo.
    The Effect of Warp Tension on the Colour of Jacquard Fabric2017Conference paper (Other (popular science, discussion, etc.))
  • 24.
    Kahoush, May
    University of Borås, Faculty of Textiles, Engineering and Business. ENSAIT.
    Bio-functionalization of conductive textile materials with redox enzymes2017In: IOP Conf. Ser.: Mater. Sci. Eng., 2017, Vol. 254, 112002Conference paper (Refereed)
    Abstract [en]

    In recent years, immobilization of oxidoreductase enzymes on electrically conductive materials has played an important role in the development of sustainable bio-technologies. Immobilization process allows the re-use of these bio-catalysts in their final applications.

    In this study, different methods of immobilizing redox enzymes on conductive textile materials were used to produce bio-functionalized electrodes. These electrodes can be used for bio-processes and bio-sensing in eco-designed applications in domains such as medicine and pollution control.

    However, the main challenge facing the stability and durability of these electrodes is the maintenance of the enzymatic activity after the immobilization. Hence, preventing the enzyme’s denaturation and leaching is a critical factor for the success of the immobilization processes. 

  • 25.
    Kumar, Vijay
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Rawal, Amit
    Indian Institute of Technology Delhi, India.
    Elastic Moduli of Electrospun Mats: Importance of Fiber Curvature and Specimen Dimensions2017In: Journal of The Mechanical Behavior of Biomedical Materials, ISSN 1751-6161, E-ISSN 1878-0180, Vol. 72, 6-13 p.Article in journal (Refereed)
    Abstract [en]

    Success of tissue engineering relies on the architecture and properties of porous scaffolds. Electrospun nonwoven scaffolds in the form of mats are unique materials due to large surface area to volume ratio, high porosity, versatility in surface functionalities and excellent mechanical properties. Maneuvering the mechanical behavior ofthe electrospun mat is a major challenge both from theoretical and experimental perspectives. Herein, we report a two-dimensional (2D) analytical model of normalized elastic moduli of electrospun mats by formulating a relationship with the governing fiber and structural parameters. The analytical model of normalized mat modulush as also accounted for fiber curvature in the form of sinusoidal curve along with the specimen dimensions considered during the uniaxial tensile test. A comparison has been made between the magnitudes of normalized matmodulus obtained through predictive modeling and the experimental results adapted from the literature. In general, a good agreement has been found between the theoretical and experimental results of normalized moduli ofthe electrospun mats. An interplay of some of the governing parameters has been analyzed through parametric analysis. Through theoretical modeling, the normalized amplitude of fiber crimp via fiber diameter along withthe aspect ratio of specimen dimensions are observed to be the dominant factors responsible for modulating thenormalized mat modulus.

  • 26.
    Li, Cai
    et al.
    Cognitiona and Interaction Lab, School of Informatics, University of Skövde, Sweden.
    Bredies, Katharina
    University of Borås, Faculty of Textiles, Engineering and Business.
    Lund, Anja
    University of Borås, Faculty of Textiles, Engineering and Business.
    Nierstrasz, Vincent
    University of Borås, Faculty of Textiles, Engineering and Business.
    Hemeren, Paul
    Cognition and Interaction Lab, School of Informatics, University of Skövde, Sweden.
    Högberg, Dan
    School of Engineering Science, University of Skövde, Sweden.
    kNN based Numerical Hand Posture Recognition using a Smart Textile Glove2015Conference paper (Refereed)
  • 27.
    Lindblad, Angelica
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Chu, Anny
    University of Borås, Faculty of Textiles, Engineering and Business.
    Manifestation och implementering av CSR: En studie om hur ett mindre företag kan använda CSR som instrumentför att stärka varumärket2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syfte: Syftet är att undersöka och analysera hur arbete med CSR (Corporate SocialResponsibility) och hållbarhet kan manifesteras och implementeras i ett mindre företag för attstärka företagets varumärke.

    Metod: Uppsatsen grundas i en kvalitativ metod för att eftersträva en holistisk- ochövergripande bild. Metoden är explorativ och utforskande och ger en djupare insikt ochförståelse för företagets tillvägagångssätt. Som utgångspunkt för sekundära källor harelektroniska och tryckta källor samt akademiska artiklar använts.

    Slutsats: Efter avslutade studier kan konstateras att genom företagets ståndpunkt i etik, moraloch värderingar i kombination med de praktiska handlingar de utför, manifesteras ochimplementeras CSR- och hållbarhetsarbete i verksamheten. Kundens medvetande ger styrkanoch det värdefulla i varumärket vilket leder till att dessa aktiviteter på ett omsorgsfullt ochgenuint sätt bör planeras och genomföras för att behålla och stärka företagetsvarumärkesimage.

  • 28.
    Ljungholm, Hanna
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Johansson, Amanda
    University of Borås, Faculty of Textiles, Engineering and Business.
    Återvinning av blandmaterial: Polyamid och Polyester2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    If people continue with the present consumption behaviour, the earth´s resources will run out. The fossil raw material petroleum is normally used in the manufacture of polyester and polyamide. Petroleum has a 100 000 annual process, which is a huge difference compared to the rate at which it is consumed. Therefore, any opportunities to recreate a new fibre from recycled synthetic bland materials are studied in this work.

    There are existing methods to recycle polyester and polyamide as homogeneous ma-terials. However, the recovery in a joint process get the final product a degraded quality. Mechanical and chemical recycling makes it possible to produce new syn-thetic filaments, but in the current situation, the chemical will provide comparable quality of the recycled filament in relation to the virgin.

    Several separation methods can be applied to the blend material. Various properties such as density, polarity and charging possibilities can be used to separate polymers. Polyester and polyamide are assumed to be separated, however, is not done on an industrial basis, probably because of the quantity, resources and money.

  • 29.
    Lopez, Iris Valencia
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Axgart, Emma
    University of Borås, Faculty of Textiles, Engineering and Business.
    Fernandes, Catia Alves
    University of Borås, Faculty of Textiles, Engineering and Business.
    Säger en bild mer än 1000 ord?: En studie om skapandet av en fototeknisk metod med hjälp av 360° fotografering2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Lingual- and cultural differences can lead to complications in the textile manufacturing process, due to misunderstandings in communication between supplier and producer. The purpose of this thesis is to examine how the technical communications between producer and supplier can be simplified through usage of photography. The results have been reached through interviews with two experts in the fields of photography and textile production. Interviews have been conducted, with an assistant buyer from a multinational Swedish cooperation and a buyer/designer from a smaller company. An experimental observation has also been carried out, where the development of a manual for the 360° photo shooting occurred. The thesis discusses the production process, in which the communication between the producer and the supplier takes place. A 360° method, which can improve the communication between producer and supplier have been designed in the study. The study also addresses the possibility of achieving a quality improvement through the usage of 360° photography. In the paper there is a manual designed for a complete 360° approach that clearly describes the procedure. The authors of this study concluded that three out of the four samples sent between producer and supplier can be replaced by images developed through 360° photography.

  • 30.
    Lund, Anja
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Bazooyar, Faranak
    University of Borås, Faculty of Textiles, Engineering and Business.
    Wand, Charlie
    University of Borås, Faculty of Textiles, Engineering and Business.
    Bolton, Kim
    University of Borås, Faculty of Textiles, Engineering and Business.
    Inducing piezoelectric beta-phase in PVDF for fibre- and printed sensors2015Conference paper (Other academic)
  • 31.
    Lund, Anja
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Melvinsson, Rebecca
    University of Borås, Faculty of Textiles, Engineering and Business.
    Malm, Veronica
    University of Borås, Faculty of Textiles, Engineering and Business.
    Wand, Charlie
    University of Borås, Faculty of Textiles, Engineering and Business.
    Tahir, Mohammad Waseem
    Högskolan i Skövde.
    Skrifvars, Mikael
    Stigh, Ulf
    Högskolan i Skövde.
    Bolton, Kim
    University of Borås, Faculty of Textiles, Engineering and Business.
    Nierstrasz, Vincent
    Melt Spun PVDF Actuator Fibres: the Effect of Spin-Line Orientation and MW on Actuation2015In: Regional Conference Polymer Processing Society Graz 2015: Book of Abstracts, 2015, 306- p.Conference paper (Other academic)
    Abstract [en]

    This paper presents the melt spinning and characterisation of polymer actuator fibres; fibres that reversibly contract along the fibre axis in response to heat. Recently, Haines et al (1) showed that low-cost filaments, e.g. fishing lines, can be relevant precursors for artificial muscles. They demonstrated a reversible fibre-direction thermal contraction, which was significantly amplified when the fibres were twisted and coiled. The effect was explained to result from an increase in the conformational entropy of the amorphous phase. In earlier studies on negative thermal expansion in anisotropic polymer structures, it has been shown that the negative thermal expansion in oriented highly crystalline polymers approaches values typical of polymer crystals (2).

     

    To further investigate the mechanisms behind these seemingly simple artificial muscles, we have melt spun fibres from poly(vinylidene fluoride) (PVDF) – Solef  1006 and 1008 kindly provided by Solvay (Milan, Italy) – and compared their properties to a commercially available PVDF-fishing line. The fibres were characterised with respect to their thermal actuation properties, crystal morphology and degree of orientation along the spin-line axis.

     

    We have further done modelling on the molecular and macroscopic levels examining the possible mechanisms of negative thermal expansion in semi-crystalline PVDF. We believe that tie molecules (a polymer chain linking two crystalline regions) are the predominant factor influencing actuation. Two mechanisms are considered: an entropic effect and a conformational change effect. The entropic effect causes an increase in the elastic stiffness with an increase in temperature, effectively resulting in a contraction of a strained fibre. The conformational change effect is also expected to contribute to contraction as tie molecules, under strain, revert to their unloaded preferred conformation when heated.

    1. C. S. Haines et al., Artificial Muscles from Fishing Line and Sewing Thread. Science 343, 868-872 (2014).
    2. C. L. Choy et al., Negative Thermal Expansion in Oriented Crystalline Polymers. Journal of Polymer Science: Polymer Physics Edition 19, 335-352 (1981).
  • 32.
    Nierstrasz, Vincent
    University of Borås, Faculty of Textiles, Engineering and Business.
    Enzymatic Processing of Textiles2015Conference paper (Other (popular science, discussion, etc.))
  • 33.
    Nierstrasz, Vincent
    University of Borås, Faculty of Textiles, Engineering and Business.
    Resource effective textile processes2016In: ISC Liuzhou September 8-10, 2016, China, 2016Conference paper (Refereed)
  • 34.
    Nierstrasz, Vincent
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Dural-Erem, Aysin
    University of Borås, Faculty of Textiles, Engineering and Business.
    Functionalization of textiles with probiotic spores2017In: Dornbirn MFC, 2017, 15- p.Conference paper (Refereed)
  • 35.
    Nierstrasz, Vincent
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Johansson, Mats
    University of Borås, Faculty of Textiles, Engineering and Business.
    Niit, Ellinor
    University of Borås, Faculty of Textiles, Engineering and Business.
    Tadesse Abate, Molla
    University of Borås, Faculty of Textiles, Engineering and Business.
    Functionalization of textiles in supercritical CO22016In: 55th Man Made Fiber Conference / Dornbirn MFC, 2016Conference paper (Refereed)
  • 36.
    Nierstrasz, Vincent
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Tadesse, Melkie Getnet
    University of Borås, Faculty of Textiles, Engineering and Business.
    Harpa, Rodica
    Gheorghe Asachi Technical University of Iasi, Faculty of Textiles.
    Loghin, Carmen
    Gheorghe Asachi Technical University of Iasi, Faculty of Textiles.
    Chen, Yan
    Soochow University, College of Textile and Clothing Engineering.
    Wang, Lichuan
    Soochow University, College of Textile and Clothing Engineering.
    SUBJECTIVE EVALUATION OF FUNCTIONAL TEXTILE FABRICS2017In: ITMC2017 - International Conference on Intelligent Textiles and Mass Customization, 2017, 1-2 p.Conference paper (Refereed)
  • 37.
    Nilsson, Linnéa
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Satomi, Mika
    Vallgårda, Anna
    Worbin, Linda
    University of Borås, Faculty of Textiles, Engineering and Business.
    Understanding the complexity of designing dynamic textile patterns2011In: Proceedings of the Ambience conference, Borås, Sweden, 2011, 28-30 p.Conference paper (Refereed)
    Abstract [en]

    Through a smart textile design project we have identified two sets of complex issues generally relevant for design with state changing materials. Specifically, we show how the temporal dimension of smart textiles increase the complexity of traditional textile design variables such as form and colour. We also show how the composite nature of smart textiles creates a series of interdependencies that make the design of the textile expressions additionally complex. We discuss how these forms of complexity provide opportunities as well as challenges for the textile expressions, and we show how we dealt with them in practice.

  • 38.
    Paras, Manoj Kumar
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Curteza, A.
    Gheorghe Asachi Technical University of Iasi, Romania.
    Pal, Rudrajeet
    University of Borås, Faculty of Textiles, Engineering and Business.
    A state-of-the-art Literature Review of Upcycling: A Clothing Industry Perspective2016In: CORTEP 2016 - Book of Abstracts: 16th Romanian Textiles and Leather Conference / [ed] Avadanei Manuela, Bucharest: Editura Acreditata de Cncsis Bucuresti , 2016, 121- p.Conference paper (Refereed)
    Abstract [en]

    Aim: The purpose of this study is to review and appreciate the developments in the literature of upcycling domain; (i) To comprehend the concept of upcycling and subsequently, understanding the difference among the prominent terminologies used in the literature (ii) To identify application of upcycling across various industries; (iii) To propose a framework of upcycling practices for clothing industries based on the insights.

     Methodology: A scientific literature review procedure proposed by Mayring (2002) was adopted to select and screen the paper which comprised of four steps; (i) Material collection: The collection of material is well defined and delimited based on the profiling approach. Each paper is defined as unit of analysis; (ii) Descriptive analysis: Different criteria are set to analyze collected materials. These are publication year, journal, methodology and author affiliations; (iii) Category selection: To do analysis different categories have been identified. Further those categories were divided into sub-categories; (iv) Material evaluation: According to above mentioned categorization, research papers are analyzed and interpreted to form a conceptual framework.

     Result: The paper has identified terminologies and definitions used in the literature. Recycling may be considered as  the use of the material properties (e.g. as a fire retardant non-woven material in a mattress spring cover) (Morley, Bartlett et al. 2009). Down-cycling may be conceptualized as making an inferior product or broken down into raw material. However, several scholars proposed various definitions of upcycling. The prominent may include: (i) Value/quality of product is improved by making superior product. (Dervojeda, Verzijl et al. 2014); (ii) Giving new value to materials that are either discarded, or are not being used anymore" (Fletcher and Grose 2012); (iii) repurposing lower-value items such as a neck scarf to construct a higher-value end use item, such as a wrap skirt or halter top (Janigo and Wu 2015). The results indicated that designing may be considered as one of the important steps in upcycling process. The process of redesigning consists of ideation, reconstruction and fitting. The limitation of redesigning is variability in size and pattern. This can be overcome by; craftsmanship, time, innovation, provenance, desire, narrative.

     Conclusion: The extant literature revealed that no study so far has attempted to summarize the literature in upcylcing area. Thus, this could be seen as a significant and unique contribution to the literature. Further, the bibliography and insights provided in the study may be used by future scholars as a ready reference for their research.

  • 39.
    Persson, Anders
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Björquist, Stina
    University of Borås, Faculty of Textiles, Engineering and Business.
    Aronsson, Julia
    University of Borås, Faculty of Textiles, Engineering and Business.
    Henriksson, Gunnar
    re:newcell AB.
    Textile qualities of regenerated cellulosefibers from cotton waste pulp2017In: Textile research journal, ISSN 0040-5175, E-ISSN 1746-7748Article in journal (Refereed)
    Abstract [en]

    Cotton is not the answer to meet the rapidly growing demand for textile fibers. Wood-based regenerated cellulosefibers are an attractive alternative. Since wood is a candidate to replace fossil raw materials in so many applications of thecircular economy, other sources need investigation. Cotton linters work in the viscose process – can cotton waste beused to make dissolving pulp? We describe the textile qualities of lyocell fibers from (i) pure cotton waste pulp and(ii) blending with conventional dissolving pulp. The staple fibers were tensile tested, yarns spun and tensile tested andknitted, and tested for shrinkage, water and dye sorption, abrasion resistance, fuzzing and pilling, staining and fastness.TENCEL staple fibers and off-the-shelf TENCEL yarn were used as references. The results show that the two studyfibers had tenacity and an E-modulus that exceeded the staple fiber reference. Also, the study yarns were at least as goodas the spun reference yarn and the commercial off-the-shelf yarn in terms of wet tenacity. Single jerseys made from thestudy yarns shrunk less upon laundering, which is surprising since they could absorb at least as much water at acomparable rate as the references. Dyeability, staining and color fastness, durability and pilling tendency showed thatthe two study fiber tricots performed at least as good as the references. This study suggests that cotton waste is apromising candidate for special grade pulp to suit niche regenerated fiber products or to spice up conventional woodbaseddissolving pulp.

  • 40.
    Persson, Anders
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Tanttu, Marjaana
    Aalto University.
    Michud, Anne
    Aalto University.
    Asaadi, Shirin
    Aalto University.
    Ma, Yibo
    Aalto University.
    Netti, Eveliina
    Aalto University.
    Kääriainen, Pirjo
    Aalto University.
    Berntsson, Anders
    Textilmuseet.
    Sixta, Herbert
    Aalto University.
    Hummel, Michael
    Aalto University.
    Ioncell-F: ionic liquid-based cellulosic textile fibers as an alternative to viscose and Lyocell2016In: Textile research journal, ISSN 0040-5175, E-ISSN 1746-7748, Vol. 86, no 5, 543-552 p.Article in journal (Refereed)
    Abstract [en]

    Ioncell-F, a recently developed process for the production of man-made cellulosic fibers from ionic liquid solutions by dry-jet wet spinning, is presented as an alternative to the viscose and N-methylmorpholine N-oxide (NMMO)-based Lyocell processes. The ionic liquid 1,5-diazabicyclo[4.3.0]non-5-ene acetate was identified as excellent cellulose solvent allowing for a rapid dissolution at moderate temperatures and subsequent shaping into continuous filaments. The highly oriented cellulose fibers obtained upon coagulation in cold water exhibited superior tenacity, exceeding that of commercial viscose and NMMO-based Lyocell (Tencel) fibers. The respective staple fibers, which have been converted into two-ply yarn by ring spinning technology, presented very high tenacity. Furthermore, the Ioncell yarn showed very good behavior during the knitting and weaving processes, reflecting the quality of the produced yarn. The successfully knitted and woven garments from the Ioncell yarn demonstrate the suitability of this particular ionic liquid for the production of man-made cellulosic fibers and thus give a promising outlook for the future of the Ioncell-F process.

  • 41. Persson, Maria
    et al.
    Lorite, Gabriela
    Kokkonen, Hanna
    Lehenkari, Petri
    Skrifvars, Mikael
    University of Borås, School of Engineering.
    Tuukkanen, Juha
    Effect of bioactive extruded PLA/HA composite films on focal adhesion formation of preosteoblastic cells2014In: Colloids and Surfaces B: Biointerfaces, ISSN 0927-7765, E-ISSN 1873-4367, Vol. 121, 409-416 p.Article in journal (Refereed)
    Abstract [en]

    The quality of the initial cell attachment to a biomaterial will influence any further cell function, including spreading, proliferation, differentiation and viability. Cell attachment is influenced by the material's ability to adsorb proteins, which is related to the surface chemistry and topography of the material. In this study, we incorporated hydroxyapatite (HA) particles into a poly(lactic acid) (PLA) composite and evaluated the surface structure and the effects of HA density on the initial cell attachment in vitro of murine calvarial preosteoblasts (MC3T3-EI). Scanning electron microscopy (SEM), atomic force microscopy (AFM) and infrared spectroscopy (FTIR) showed that the HA particles were successfully incorporated into the PLA matrix and located at the surface which is of importance in order to maintain the bioactive effect of the HA particles. SEM and AFM investigation revealed that the HA density (particles/area) as well as surface roughness increased with HA loading concentration (i.e. 5, 10, 15 and 20wt%), which promoted protein adsorption. Furthermore, the presence of HA on the surface enhanced cell spreading, increased the formation of actin stress fibers and significantly improved the expression of vinculin in MC3T3-E1 cells which is a key player in the regulation of cell adhesion. These results suggest the potential utility of PLA/HA composites as biomaterials for use as a bone substitute material and in tissue engineering applications.

  • 42.
    Peterson, Joel
    University of Borås, Faculty of Textiles, Engineering and Business.
    The Co-design Process in Mass Customization of Complete Garment Knitted Fashion Products2016In: Journal of Textile Science & Engineering, E-ISSN 2165-8064, Vol. 6, no 4, 1-8 p.Article in journal (Refereed)
    Abstract [en]

    Complete garment knitting technology is a method of producing products, generally fashion garments, readymade directly in the knitting machine without operations such as cutting and sewing. This makes it possible to manufacture a fashion garment with fewer processes then with conventional methods. Mass customisation is a customer co-design process of products and that tries to meets the needs of an individual customer's demand. The customer can order a garment with a customised style, colour, size, and other personal preferences. Co-design is a collaborative process between the customer, the retailer, and the manufacturer by which a product is customised to fulfil the customer's requirements. This paper is based on the results of a doctoral thesis. The process of codesign and manufacture of a customised complete fashion product is examined. Research was conducted by a retail concept simulation and three case studies. A cross-case analysis was done to analyse the data. The main findings are a description of two kinds of retail concepts for knitted customized fashion products. A knitted garment can be customized, produced, and delivered to the customer in three to five hours. In the Co-design process two kinds of interactions are feasible between the company and the customer: manual or digital co-design. A manual process has advantages such as: high service level for customers, no requirement of advanced technical equipment. However, manual co-design is labour intensive, a shop assistant can only serve one client at a time. It is also only pplicable to brick-and-mortar stores and not transferable to the Internet. Digital codesign, on the other hand, encourages customers to do the customisation on their own, without the aid of sales personnel and little risk of queues. Moreover, this technique is ideal for the Internet. Disadvantages to date have included limited design options and problem of taking body measurements.

  • 43.
    Peterson, Joel
    et al.
    University of Borås, Swedish School of Textiles.
    Vegborn, Ellinor
    University of Borås, Swedish School of Textiles.
    Andersson, Carl-Håkan
    University of Borås, Swedish School of Textiles.
    Knittability of fibres with high stiffness2000Conference paper (Other academic)
    Abstract [en]

    Knitting techniques and machinery are extensively used for the production of textile products for garmet and industrial use. Knitting is also gaining importance for composite materials performing. Basically two principles are in use. i) Weft knitting gives structures of for example traditional sweaters types suitable for structures taking impact loads. ii) Warp knitting gives the traditional tricot structures and the non crimped insert yarn DOS-fabrics extensively used for composite materials fabrication. In the knitting process do hooked needles pick up yarns and form closed loops. The stability of the loop formation depends on the bending of the fibres and type of friction on the needles during the different stages of the knitting process. The characteristics of static friction when the yarn is drawn by the needles into the machine, sliding friction in the loop formation and release after loop formation are of vital importance for the final product. The complexity of the yarn behaviour, the far from ideal mechanical and tribological behaviour of the fibres are mastered by many knitters. The history of knitting indicate the same kind of phenomena as indicated by the history of the steam engine: ”Science owes more to the steam engine than the steam engine owes to science”, lord Kelvin. The knitting process has however been modelled from first principles using models for friction of fibres on positively curved surfaces and simultaneous plastic deformation. A method and fixtures based on earlier work by Andersson et.al adopted for tests of the stress build up in fibres on knitting needles in order to study the knitting process in a tensile testing machine have been developed. Monofilaments and high modulus multifilament yarns known for giving difficulties in knitting process have been studied with respect to : – Static friction – Bending radius of the fibre during the process – Adhesion to needle at the end contact – Sliding friction Plain knitted fabrics and symmetric spacer fabrics have been produced of monofilament and multifilament nylon, PET and aramides. Analysis of fabrics in compression is going on.

  • 44.
    Rafstedt, Josefina
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Friberg Lundgren, Johanna
    University of Borås, Faculty of Textiles, Engineering and Business.
    Kreativitet vs Kapital: Användningen av innovativa marknadsföringsmetoder hos svenska modeföretag2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    År 2013 var den globala omsättningen för modeindustrin ca 76 tusen miljarder svenska kronor (Office of Textiles and Apparel, 2014). Bara i Sverige omsattes det 229 miljarder svenska kronor år 2012 inom denna sektor, en ökning på 11 % från föregående år (Tillväxtverket, 2014). Att modebranschen är under ständig utveckling och ökar i tillväxt kan man se då dessa siffror stiger varje år. Statistik från 2014 visar att trots denna ökning så överlever endast 47 % av nystartade modeföretag de tre första åren (Statistic Brain, 2014). Så hur lyckas man som modeföretag i early stage-fasen att med begränsade resurser stärka sitt varumärke och hålla sig kvar på marknaden? I denna studie berörs olika delar så som traditionell marknadsföring, okonventionell marknadsföring, branding samt transparens, där huvudfokus ligger på företag i early stage- fasen av sin uppstart. I uppsatsen genomfördes sju intervjuer med svenska modeföretag som är eller nyligen varit i denna fas för att få ett resultat med så hög validitet som möjligt. Brist på kunskap och kapital är inte ovanligt i denna bransch och med ökad medvetenhet hos konsumenter om de olika processerna, så kan det ibland uppstå svårigheter att försvara sig som nystartat företag. Då modebranschen är i ständig rörelse med stora förändringar från säsong till säsong måste man som nytt företag vara beredd på reformation samt att alltid tänka innovativt. Det är även viktigt att vara uppmärksam på kommande och rådande trender gällande alla aktiviteter ett företag arbetar med. Eftersom olika marknadsföringsstrategier både kan hjälpa och stjälpa ett varumärkes position på marknaden är den stora utmaningen att hitta rätt metod för just sitt företag (Easy, M. 2009). Resultatet av denna studie kommer alltså att bygga på de kvalitativa intervjuer som genomförts med de utvalda företag som har valt att medverka. De beskriver hur deras uppstart sett ut när det kommer till branding samt hur de i olika kanaler väljer att marknadsföra sig. I dessa intervjuer tittar vi även närmare på hur de lyckades starta sin verksamhet och vilka kapitalmedel de använt, deras syn på okonventionell marknadsföring samt hur marknadsföring och branding hänger samman.

  • 45.
    Ramamoorthy, Sunil Kumar
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Bakare, Fatimat
    University of Borås, Faculty of Textiles, Engineering and Business.
    Herrmann, Rene
    Arcada University of Applied Science.
    Skrifvars, Mikael
    University of Borås, Faculty of Textiles, Engineering and Business.
    Performance of biocomposites from surface modified regenerated cellulose fibers and lactic acid thermoset bioresin2015In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882XArticle in journal (Refereed)
    Abstract [en]

    The effect of surface treatments, silane and alkali, on regenerated cellulose fibers was studied by using the treated fibers as reinforcement in lactic acid thermoset bioresin. The surface treatments were performed to improve the physico–chemical interactions at the fiber–matrix interface. Tensile, flexural and impact tests were used as indicator of the improvement of the interfacial strength. Furthermore, thermal conductivity, viscoelasticity measurements as well as microscopy images were made to characterize the fiber surface treatments and the effect on adhesion to the matrix. The results showed that silane treatment improved the mechanical properties of the composites as the silane molecule acts as link between the cellulose fiber and the resin (the fiber bonds with siloxane bridge while the resin bonds with organofunctional group of the bi-functional silane molecule) which gives molecular continuity in the interphase of the composite. Porosity volume decreased significantly on silane treatment due to improved interface and interlocking between fiber and matrix. Decrease in water absorption and increase in contact angle confirmed the change in the hydrophilicity of the composites. The storage modulus increased when the reinforcements were treated with silane whereas the damping intensity decreased for the same composites indicating a better adhesion between fiber and matrix on silane treatment. Thermogravimetric analysis indicated that the thermal stability of the reinforcement altered after treatments. The resin curing was followed using differential scanning calorimetry and the necessity for post-curing was recommended. Finite element analysis was used to predict the thermal behavior of the composites and a non-destructive resonance analysis was performed to ratify the modulus obtained from tensile testing. The changes were also seen on composites reinforced with alkali treated fiber. Microscopy images confirmed the good adhesion between the silane treated fibers and the resin at the interface.

  • 46.
    Rao, P. V. Kameswara
    et al.
    Indian Institute of Technology Delhi, Hauz Khas, New Delhi, India.
    Rawal, Amit
    Indian Institute of Technology Delhi, Hauz Khas, New Delhi, India; Fraunhofer Institute of Industrial Mathematics (ITWM), Fraunhofer-Platz 1, D-67663 Kaiserslautern, Germany.
    Kumar, Vijay
    University of Borås, Faculty of Textiles, Engineering and Business.
    Rajput, Krishn Gopal
    Indian Institute of Technology Delhi, Hauz Khas, New Delhi, India.
    Compression-recovery model of absorptive glass mat (AGM) separator guided by X-ray micro-computed tomography analysis2017In: Journal of Power Sources, ISSN 0378-7753, E-ISSN 1873-2755, Vol. 365, 389-398 p.Article in journal (Refereed)
    Abstract [en]

    Absorptive glass mat (AGM) separators play a key role in enhancing the cycle life of the valve regulated lead acid (VRLA) batteries by maintaining the elastic characteristics under a defined level of compression force with the plates of the electrodes. Inevitably, there are inherent challenges to maintain the required level of compression characteristics of AGM separators during the charge and discharge of the battery. Herein, we report a three-dimensional (3D) analytical model for predicting the compression-recovery behavior of AGM separators by formulating a direct relationship with the constituent fiber and structural parameters. The analytical model of compression-recovery behavior of AGM separators has successfully included the fiber slippage criterion and internal friction losses. The presented work uses, for the first time, 3D data of fiber orientation from X-ray micro-computed tomography, for predicting the compression-recovery behavior of AGM separators. A comparison has been made between the theoretical and experimental results of compression-recovery behavior of AGM samples with defined fiber orientation characteristics. In general, the theory agreed reasonably well with the experimental results of AGM samples in both dry and wet states. Through theoretical modeling, fiber volume fraction was established as one of the key structural parameters that modulates the compression hysteresis of an AGM separator.

  • 47.
    Rawal, Amit
    et al.
    Indian Institute of Technology Delhi; Fraunhofer Institute for Industrial Mathematics (ITWM); Institut für Textil- und Verfahrenstechnik.
    Kumar, Vijay
    University of Borås, Faculty of Textiles, Engineering and Business.
    Saraswat, Harshvardhan
    MLV Textile & Engineering College.
    Weerasinghe, Dakshitha
    Institut für Textil- und Verfahrenstechnik.
    Hietel, Dietmar
    Fraunhofer Institute for Industrial Mathematics (ITWM).
    Dauner, Martin
    Institut für Textil- und Verfahrenstechnik.
    Creating three-dimensional (3D) fiber networks with out-of-plane auxetic behavior over large deformations2017In: Journal of Materials Science, ISSN 0022-2461, E-ISSN 1573-4803, Vol. 52, no 5, 2534-2548 p.Article in journal (Refereed)
    Abstract [en]

    Fiber networks with out-of-plane auxetic behavior have been sporadically investigated. One of the major challenges is to design such materials with giant negative Poisson’s ratio over large deformations. Here in, we report a systematic investigation to create three-dimensional (3D) fiber networks in the form of needlepunched nonwoven materials with out-of-plane auxetic behavior over large deformations via theoretical modeling and extensive set of experiments. The experimental matrix has encapsulated the key parameters of the needlepunching nonwoven process. Under uniaxial tensile loading, the anisotropy coupled with local fiber densification in networks has yielded large negative Poisson’s ratio (up to −5.7) specifically in the preferential direction. The in-plane and out-of-plane Poisson’s ratios of fiber networks have been predicted and, subsequently, compared with the experimental results. Fiber orientation was found to be a core parameter that modulated the in-plane Poisson’s ratio of fiber networks. A parametric analysis has revealed the interplay between the anisotropy of the fiber network and the out-of-plane Poisson’s ratio based upon constant volume consideration.

  • 48.
    Sandsjö, Leif
    et al.
    University of Borås, Faculty of Caring Science, Work Life and Social Welfare.
    Ragnerius, Anna
    Signals and Systems/Chalmers.
    Widelund, Frida
    Signals and Systems/Chalmers.
    Candefjord, Stefan
    Signals and Systems/Chalmers.
    Rundqvist, Karin
    University of Borås, Faculty of Textiles, Engineering and Business.
    Nilsson, Erik
    Swerea/IVF.
    Persson, Nils-Krister
    University of Borås, Faculty of Textiles, Engineering and Business.
    A piezoelectric smart textile sock for gait analysis - A feasibility study2016Conference paper (Other academic)
  • 49. Schneegass, Stefan
    et al.
    Hassib, Mariam
    Zhou, Bo
    Cheng, Jingyuan
    Seoane, Fernando
    University of Borås, Faculty of Caring Science, Work Life and Social Welfare. KTH-School of Technology and Health.
    Amft, Oliver
    Lukowicz, Paul
    Schmidt, Albrecht
    SimpleSkin: towards multipurpose smart garments2015Conference paper (Refereed)
  • 50.
    Seoane, Fernando
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Soroudi, Azadeh
    University of Borås, Faculty of Textiles, Engineering and Business.
    Abtahi, Farhad
    KTH, Medicinsk teknik.
    Lu, Ke
    KTH-School of Technology and Health.
    Skrifvars, Mikael
    University of Borås, Faculty of Textiles, Engineering and Business.
    Printed Electronics Enabling a Textile-friendly Interconnection between Wearable Measurement Instrumentation & Sensorized Garments2016Conference paper (Refereed)
12 1 - 50 of 62
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