Dissertations / Theses: 'Textile fabrics'

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Thomas, Howard LaVann. "Analysis of defects in woven fabrics : development of the knowledge base." Thesis, Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/9185.

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Mvubu, Mlando Basel. "Studies on acoustic properties of non-woven fabrics." Thesis, Nelson Mandela Metropolitan University, 2017. http://hdl.handle.net/10948/19387.

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This study is divided in to two main parts. The first part deals with the optimization of process parameters of needle-punched non-woven fabrics for achieving maximum sound absorption by employing a Box-Behnken factorial design. The influence of fibre type, depth of needle penetration and stroke frequency on sound absorption properties were studied. These parameters were varied at three levels during experimental trials. From multiple regression analysis, it was observed that the depth of needle penetration alone was the most dominant factor among the selected parameters, which was followed by the interaction between depth of needle penetration and stroke frequency. Fibre type was the least dominant parameter affecting sound absorption. A maximum sound absorption coefficient of 47% (0.47) was obtained from the selected parameters. The results showed that for a process such as needle-punching, which is influenced by multiple variables, it is important to also study the interactive effects of process parameters for achieving optimum sound absorption. The second part of the study deals with the effect of type of natural fibre (fineness), and the blending ratio (with PET fibres) on the air permeability of the needle-punched non-woven fabrics and then it proceeds to study the effect of the air-gap, type of natural fibre (fineness) and blending ratio (with PET fibres) on sound absorption of needle-punched non-woven fabrics. These parameters are tested individually and their two way interaction (synergy) effect using ANOVA. The air-gap was varied from 0mm to 25mm with 5mm increments, three natural fibre types were used and all were blended with polyester fibres at three blending ratios for each natural fibre type. The Univariate Tests of Significance shows that all three parameters have a significant effect on sound absorption together with two two-way interactions, with the exception of the Blend Ratio × Air Gap two-way interaction which was not significant. It was found that the sound absorption improves with the increase in the air-gap size up to 15mm after which sound absorption decreased slightly with the further increase in the air-gap up to 25mm.

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Johansson, Ludvig. "On the Mechanical Recycling of Woven Fabrics : Improving the Reusable Fibre Yield of Mechanical Methods." Thesis, Uppsala universitet, Tillämpad materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-414569.

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This master thesis studies the recycling prospects of textiles. The textile industry contributes negatively to the global environmentthrough the release of greenhouse gases and consumption of resources. In order to achieve a circular textile industry, textiles must be recyclable by both chemical and mechanical means. Here, the focus is on mechanical extraction of staple fibres, particularly cotton, for reentry into yarn production. Experiments show that used, but undamaged, cotton sateen and cotton twill responds differently to abrasion with stochastic surfaces. Previous studies on the conventional shredding processes have shown positive impact from lubricants on extracted fibre lengths, by reducing inter-fibre friction. In the present study on abrasion, variables such as alignment of the weave pattern, lubrication and load are shown to have little to no impact on extracted fibre length, but notable effects on overall fibre quality. These analyses are supported by manual length assessment, electron micrographs and tensile tests using load cells. Furthermore, simple tests and observations on structured diamond surfaces constructed through chemical vapor deposition are promising for mechanical fibre release directly from a woven fabric. Suggestions are made on continued research in this field.

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Chan, Chi-tak. "The exploration of fabric trading format in textile industry /." [Hong Kong] : University of Hong Kong, 1994. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13788000.

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Beck, Rose Marie. "Texte auf Textilien in Ostafrika Sprichwörtlichkeit als Eigenschaft ambiger Kommunikation /." Köln : R. Köppe, 2001. http://catalog.hathitrust.org/api/volumes/oclc/49867355.html.

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Ogunleye, Christopher Olarinde. "High performance nonwovens in technical textile applications." Thesis, Nelson Mandela Metropolitan University, 2013. http://hdl.handle.net/10948/d1021011.

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The aim of this research was to establish the optimum processing conditions and parameters for producing nonwoven fabrics best suited for application in disposable and protective wear for surgical gowns, drapes and laboratory coats. Carded and crosslapped webs, of three basic weights (80, 120, and 150g/m2), from greige (unscoured and unbleached) cotton, viscose and polyester fibres, were hydroentangled, using three different waterjet pressures (60, 100 and 120 bars), on a Fleissner Aquajet hydroentanglement machine. An antibacterial agent (Ruco-Coat FC 9005) and a fluorochemical water repellent agent (Ruco Bac-AGP), were applied in one bath using the pad-dry-cure technique, to impart both antibacterial and water repellent properties to the fabrics, SEM photomicrographs indicating that the finished polymers were evenly dispersed on the fabric surface. The effect of waterjet pressure, fabric weight and type and treatment on the structure of the nonwoven produced, was evaluated by measuring the relevant characteristics of the fabrics. As expected, there was an interrelationship between fabric weight, thickness, and density, the fabric thickness and mass density increasing with fabric weight. An increase in waterjet pressure decreased the fabric thickness and increased the fabric density. The water repellent and antibacterial treatment increased the fabric weight and thickness. The antimicrobial activity of the fabrics was assessed by determining the percentage reduction in Staphylococcus aureus and Escherichia coli bacteria population. The maximum percent reduction at 24hrs contact time for both bacteria ranged from 99.5 to 99.6 percent for all the fabric types. The standard spray test ratings for the three treated fabrics ranged from 80-90 percent, whereas that of the untreated water repellent fabric was zero, while the contact angles for all the fabric types exceeded 90 degrees, indicating good resistance to wetting. It was found that the tensile strength of the fabric in the cross-machine direction was higher than that in the machine direction, for both the treated and untreated fabrics, with the tensile strengths in both the MD and CD of the treated fabrics were greater than that of the untreated fabrics, the reverse being true for the extension at break. An increase in waterjet pressure increased the tensile strength but decreased the extension at break, for both the treated and untreated fabrics. The finishing treatment decreased the mean pore size of all the fabrics, the mean pore size decreasing with an increase in fabric weight and waterjet pressure. An increase in waterjet pressure and fabric weight decreased the air and water vapour permeability, as did the finishing treatment, although the differences were not always statistically significant. The polyester fabrics had the highest water and air permeability. Hence low weight fabrics of 80 g/m2, which were hydroentangled at low water jet pressures of 60 bars, were suitable for use in this study due to their higher air and water vapour permeability as well as higher pore size distribution. These group of fabrics thus meet the requirements for surgical gowns, drapes, nurses’ uniforms and laboratory coats.

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Zou, Haichuan. "Investigation of hardware and software configuration on a wavelet-based vision system--a case study." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/8719.

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Gomez, Gabriel. "Exporting textile consumer products to Venezuela." Online version, 2000. http://www.uwstout.edu/lib/thesis/2000/2000gomezg.pdf.

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Frank, Melissa. "A survey of students' attitudes and behaviors in a freshman textiles course, and the use of a textile identification packet." Menomonie, WI : University of Wisconsin--Stout, 2006. http://www.uwstout.edu/lib/thesis/2006/2006frankm.pdf.

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Von, Hoven Terri Michelle. "Comparison of image analysis systems for their ability to detect the white speck phenomenon." Thesis, Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/8691.

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Tian, Xuwen, and 田旭文. "Data-driven textile flaw detection methods." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hdl.handle.net/10722/196091.

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This research develops three efficient textile flaw detection methods to facilitate automated textile inspection for the textile-related industries. Their novelty lies in detecting flaws with knowledge directly extracted from textile images, unlike existing methods which detect flaws with empirically specified texture features. The first two methods treat textile flaw detection as a texture classification problem, and consider that defect-free images of a textile fabric normally possess common latent images, called basis-images. The inner product of a basis-image and an image acquired from this fabric is a feature value of this fabric image. As the defect-free images are similar, their feature values gather in a cluster, whose boundary can be determined by using the feature values of known defect-free images. A fabric image is considered defect-free, if its feature values lie within this boundary. These methods extract the basis-images from known defect-free images in a training process, and require less consideration than existing methods on the degree of matching of a textile to the texture features specified for the textile. One method uses matrix singular value decomposition (SVD) to extract these basis-images containing the spatial relationship of pixels in rows or in columns. The alternative method uses tensor decomposition to find the relationship of pixels in both rows and columns within each training image and the common relationship of these training images. Tensor decomposition is found to be superior to matrix SVD in finding the basis-images needed to represent these defect-free images, because extracting and decomposing the tri-lateral relationship usually generates better basis-images. The third method solves the textile flaw detection problem by means of texture segmentation, and is suitable for online detection because it does not require texture features specified by experience or found from known defect-free images. The method detects the presence of flaws by using the contrast between regions in the feature images of a textile image. These feature images are the output of a filter bank consisting of Gabor filters with scales and rotations. This method selects the feature image with maximal image contrast, and partitions this image into regions with morphological watershed transform to facilitate faster searching of defect-free regions and to remove isolated pixels with exceptional feature values. Regions with no flaws have similar statistics, e.g. similar means. Regions with significantly dissimilar statistics may contain flaws and are removed iteratively from the set which initially contains all regions. Removing regions uses the thresholds determined by using Neyman-Pearson criterion and updated along with the remaining regions in the set. This procedure continues until the set only contains defect-free regions. The occurrence of the removed regions indicates the presence of flaws whose extents are decided by pixel classification using the thresholds derived from the defect-free regions. A prototype textile inspection system is built to demonstrate the automatic textile inspection process. The developed methods are proved reliable and effective by testing them with a variety of defective textile images. These methods also have several advantages, e.g. less empirical knowledge of textiles is needed for selecting texture features.
published_or_final_version
Industrial and Manufacturing Systems Engineering
Doctoral
Doctor of Philosophy

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Perez, Virginia. "Fire safety and interior textiles." Thesis, Virginia Tech, 1991. http://hdl.handle.net/10919/41706.

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The role of the interior designer in providing for fire safe interiors is an important one. The textile end-products they specify play an important part in the start and/or spread of interior fires. Furthermore, the rate of developments in textile testing and products makes it difficult for designers to keep abreast of the latest information. This thesis provides a program for updating interior designers on fire safe interior textiles. A one hour update program was developed as part of the thesis and delivered to members of the Southwest Regional Chapter of ASID in Roanoke, Virginia. An analysis of data from a survey showed that participants believe there is a need for an educational program such as this course and that they would attend a five hour CEU course developed on this subject. Responses to questions on textile fibers, standard tests, and new products on the market supported the perceived need for continuing education on the subject of fire safe textiles. The course evaluation in turn, determined that some areas of the program needed to be revised. This thesis provides a packaged program which can be easily updated. Furthermore, anyone with a textile background can use this program in preparing and delivering a CEU course on fire safety and interior textiles.
Master of Science

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Canup, Laura. "Non Aqueous Treatment of Fabrics Utilizing Plasmas." NCSU, 2000. http://www.lib.ncsu.edu/theses/available/etd-20001220-102603.

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The contents of this paper present information from work conducted by utilizing plasma technology for fabric treatment. Initially, experimentation was done in low-pressure plasma systems to change the hydrophilic properties of denim fabric. From these experiments, data was collected that proved denim fabric, both sized and desized, could obtain hydrophobicity through a fluorocarbon plasma treatment. Using C3F6 fluorocarbon gas provided a greater level of hydrophobicity than using CF4 plasma gas. The desized denim showed a greater amount of hydrophobicity, in both gases, than the sized denim. These results can be found in chapter IV. The remaining work, found in chapters II and III, focuses on the utilization of atmospheric plasmas on the treatment of nylon 6,6 fabric. Atmospheric plasmas could allow continuous treatment of fabric and shorter treatment times for fabric, all of which would be better suited for industrial processing, more specifically in textiles. Nylon 6,6 fabric was treated with air-He plasma as well as air-He-O2 plasma, where the levels of O2 varied. A significant decrease in tensile strength was found in treatments lasting five minutes or longer. However, micrographs of the fiber surface illustrate instances of surface treatment, even at times less than five minutes. Continuing work on the project includes the building of a prototype machine for industry (currently in progress), the treatment of many different kinds of fabrics, and the evaluation of their mechanical, chemical, and physical properties and functionability thereafter.

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Somi, Bongiwe Promrose. "Investigating the possibility of using wild silk fancy yarns to produce upholstery fabrics for home furniture." Thesis, Nelson Mandela Metropolitan University, 2013. http://hdl.handle.net/10948/7616.

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About a decade ago an attempt to build a viable wild silk industry, prompted by the discovery of the naturally available wild silk cocoons in the North West Province of South Africa, was made and a degumming plant was established in the Ganyesa village. The challenges faced in that establishment soon brought the developments to a standstill and cited among the problems was the lack of designer input in the production stages, which resulted in poor quality products. Focusing on the design problem the intention of this research is to explore a more effective design and production method for the wild silk fabrics. Through assessing the previously produced fabrics in order to identify their limitations, and by experimenting with innovative fabric production processes, a suitable aesthetic quality can be added to the final products. Starting with the investigation of current trends and choosing a design theme as a guide for the production process, fabric samples intended for use in upholstery of home furniture are developed. With the objective of successfully achieving a balance between aesthetic appeal and suitability for the intended end use, the fabrics are subjected to performance assessments based on internationally recognised standards. From the findings of this research it is therefore envisaged that, from the design aspect, proper redevelopment of the South African wild silk industry could encourage further involvement from textile designers. This would bring more improvement to the fabrics produced and encourage their use in different applications.

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Srinivasan, K. "FDAS : a knowledge-based framework for analysis of defects in woven textile structures." Thesis, Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/8671.

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Wang, Lejun. "Studies on toner properties and fabric performance properties for xerographic textile printing." Thesis, Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/8693.

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Winck, Ryder Christian. "Fabric control for feeding into an automated sewing machine." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28205.

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Britz, Lizaan. "A comparison of the comfort properties, measured with a sweating manikin (WalterTM), of clothing containing different fibres." Thesis, Nelson Mandela Metropolitan University, 2017. http://hdl.handle.net/10948/14752.

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The main objective of the present study was to determine the relative role and importance of worsted suiting fabric fibre blend vis-à-vis fabric structural parameters, on the comfort related properties of 12 clothing ensembles, each comprising a different man’s suit, but the same wool/nylon underwear and cotton shirt. To achieve the objective, the comfort related properties, namely thermal resistance (Rt) and water vapour resistance (Ret) and water vapour permeability index (Im), of the clothing ensembles, as determined by means of WalterTM, a thermal sweating fabric manikin, were subjected to multi-linear and multi-quadratic analysis, as dependent variables, with the various suiting fabric parameters, namely weight, thickness, density, porosity, air permeability and wool content, as independent variables. It was found that the multi-quadratic regression analysis was able to best explain the observed differences in the clothing ensemble comfort related properties, in terms of the differences in suiting fabric properties. The regression analyses were used to isolate and quantify the effects of the various fabric and fibre content variables on the above mentioned comfort related properties of the various clothing ensembles. This study indicated that the suiting fabric structural properties (notably air permeability), had a more significant influence than either fibre blend or suiting fabric, as measured on WalterTM, a thermal sweating fabric manikin.

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Park, Sungmee. "Studies on effect of fiber properties and fabric structure on fabric hand." Thesis, Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/9499.

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Cheung, Chip. "Large deformation of textile fabrics using finite element method." Ohio : Ohio University, 1988. http://www.ohiolink.edu/etd/view.cgi?ohiou1182782321.

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McFarland, Elizabeth Gramling. "Infrared absorption characteristics of fabrics." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/10185.

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Davis, Jill Benea. "Three-dimensional multilayer woven fabrics as composite preforms." Thesis, Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/12437.

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Chasmawala, Rasesh Jayantilal. "Studies on the effect of spinning parameters on the structure and properties of air jet spun yarns." Thesis, Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/8481.

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Peled, Alva, Zvi Cohen, Steffen Janetzko, and Thomas Gries. "Hybrid Fabrics as Cement Matrix Reinforcement." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-77694.

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Hybrid systems with two or more fiber materials were used to combine the benefits of each fiber into a single composite product. Strength and toughness optimization of hybrid thin sheet composites has been studied extensively using combination of different fiber types with low and high modulus of elasticity. Hybrid reinforcement is more significant when the reinforcing structure is in fabric geometry. Fabric structure provides full control on the exact location of each yarn and its orientation in the composite during production, thus maximizes the reinforcing efficiency. A high-strength, high-modulus fiber primarily tends to increase the composite strength with nominal improvements in toughness. A low-modulus fiber expected to mainly improve toughness and ductility. Combination of two or more types of fiber can produce a composite that is both strong and tough as compared to a mono fiber composite. The purpose of the current work was to study hybrid warp knitted fabrics as reinforcement for cementbased composite, having AR (Alkali Resistance) glass and Polypropylene (PP) as the reinforcing yarns. The examined ratios between the two different yarns were 0:100, 25:75, 50:50, 75:25, 100:0 (glass: PP, by percentage). It was found that in the hybrid system, the fracture mechanism is a superposition of the mono systems, and the tensile behavior is a combination between the two materials.

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Peng, Pai. "Automated defect detection for textile fabrics using Gabor wavelet networks." View the Table of Contents & Abstract, 2006. http://sunzi.lib.hku.hk/hkuto/record/B38025966.

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Tiballi, Anne E. "Castoffs and snippets the textile evidence from Casa Vieja, Ica Valley, Peru /." Online access via UMI:, 2005.

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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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Jaftha, Desiree Virginia. "South African National Accreditation System accreditation : a case study of a university of technology textile testing laboratory." Thesis, Cape Peninsula University of Technology, 2008. http://hdl.handle.net/20.500.11838/1222.

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Thesis (MTech (Quality))Cape Peninsula University of Technology, Cape Town, 2008.
The South African Government provides support to the clothing and textile industry by making funding available through programs in the Department of Science and Technology, such as the Tshumisano Technology Stations Program. The Technology Stations Program in particular supports a Technology Station in Clothing and Textiles (TSCT) at the Cape Peninsula University of Technology (CPUT), serving the needs for technology support and skills upgrading of the industry in the Western Cape, and in some instances, nationally. The TSCT testing laboratory provides testing services to small medium and large companies in South Africa at a reduced cost. The laboratory emphasises that customers should have fabrics tested before production commences. In this regard, the company will know the quality of the fabric or garment being purchased or manufactured. The laboratory technicians and assistants undergo a 'Woolworths' certification process on their test methods on an annual basis. The Woolworths certification is customer based. The laboratory is faced on a daily bases with the problem that more and more of their customers request that the facility should seek higher 'accreditation', as opposed to the current 'certification' it currently holds. The TSCT testing laboratory in addition has a responsibility to satisfy all of its customer certification and accreditation needs. Against this background, the management of the CPUT TSCT testing laboratory is now seeking accreditation from the South African National Accreditation System (SANAS) to widen the spectrum of its testing abilities. The primary research objectives of this dissertation are: To determine what the requirements are for SANAS accreditation by the CPUT TSCT testing laboratory. To determine if the CPUT TSCT testing laboratory is subject to a forced intervention for SANAS accreditation. To determine the criteria required for the CPUT TSCT testing laboratory accreditation. To determine the benefits that could be gleaned from this accreditation. To determine the effectiveness of the laboratory system, with regard to the fact that in addition to testing, the laboratory is used for teaching and learning. Descriptive research will serve as the research type, as it will describe an existing phenomena taking place. The research will be theoretical in nature and conducted in terms of both positivistic and phenomenological paradigms. Case study research will serve as research method. Data collection for the proposed research will be conducted using questionnaires. The CPUT Clothing and Textile Technology Department will serve as sampling frame, while the sample of respondents will be drawn on the basis of probability sampling. The sample will include lecturing staff, students, industry testing customers, textile test laboratory technicians, administration and support staff, all of whom are directly involved with the operation or make use of the laboratory facilities.

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Peng, Pai, and 彭湃. "Automated defect detection for textile fabrics using Gabor wavelet networks." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B38766103.

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Shams, Glorianne Pionati. "Some minor textiles in antiquity." Göteborg : P. Åström, 1987. http://catalogue.bnf.fr/ark:/12148/cb38912890q.

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Fraser, Angela. "Patterns of identity : textiles in Aotearoa : http://www.textiles.org.nz : this thesis is submitted to the Auckland University of Technology in partial fulfillment of the degree of Master of Arts (Art and Design) in the year 2004." Patterns of Identity: Textiles in Aotearoa ~ New Zealand, 2004. http://www.textiles.org.nz.

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Balakrishnan, Harinarayanan. "FDICS : a vision-based system for identification and classification of fabric defects." Thesis, Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/8465.

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Tseng, Bonnie Michele. "Effect of fluoropolymeric substances on Polyethylene Terepthalate (PET)." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/8685.

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Tung, Peter So Wah. "Design and development of three-dimensional multilayer woven preforms for composites." Thesis, Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/8686.

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Herbert, Sara L. "Measurement of fabric drape using a modified drapemeter." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-02132009-172703/.

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Zhu, Bo. "Sheet forming of woven textile composite preforms : formability and wrinkling /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?MECH%202007%20ZHU.

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Sanad, Reham Abdelbaset Elsayed. "The measurement of drape for nonwoven and conventional textile fabrics." Thesis, University of Leeds, 2013. http://etheses.whiterose.ac.uk/5046/.

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The importance of the drape properties of fabrics on final garment appearance and fit has been long understood and a great deal of research has been carried out in this area. More recently, nonwoven fabrics have begun to create interest among the apparel and fashion design community. In this study, the conventional method of measuring fabric drape was compared with garment drape measurement using an alternative drape measurement system based on an image analysis technique. Garment drape was investigated using dresses suspended on a mannequin. A garment chosen was a shift dress because of its relatively uncomplicated style and shape. Hydroentangled nonwovens were selected as they show good performance and similarity to conventional fabrics in terms of physical and mechanical properties. A graphical user interface was developed to carry out the image analysis and to calculate drape values identifying and determining 23 drape parameters. A range of fabrics including conventional (knitted, woven) and nonwoven fabrics were compared in terms of FAST properties, drape coefficient and drape values. Some nonwoven fabrics were found to give similar performance to some conventional fabrics and better than others. Subjective assessment of the fabric range was carried out in terms of drape amount and preference. Low agreement was found between individuals with regard to preferred drape amount and high agreement with respect to actual drape amount. Nonwovens were found to be better preferred over some conventional fabrics. Most of the drape values of fabric and garment were found to have poor correlations.

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Ben, Messaoud Wael. "Design and control of a tactile stimulator for real texture simulation : application to textile fabrics." Thesis, Lille 1, 2016. http://www.theses.fr/2016LIL10040/document.

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La modulation de frottement par vibrations ultrasoniques est une des méthodes utilisées pour produire une stimulation tactile. L’amplitude de vibration est modulée en fonction de la position du doigt pour donner l’illusion à l’utilisateur de toucher une texture. L’objectif de cette thèse est de développer une interface tactile permettant de simuler la sensation tactile de textures complexes telles que des surfaces textiles. Pour ce faire, nous avons tout d’abord implanté une méthode de contrôle robuste du stimulateur tactile du L2EP grâce au développement d’un modèle du comportement vibratoire. Ce contrôle assure également le suivi de la fréquence de résonance afin d’optimiser l’efficacité énergétique du dispositif. Dans un second temps et après avoir évalué la relation entre les aspects tribologiques de l’interaction doigt/stimulateur et la perception des stimuli, nous avons prouvé par une étude statistique que le «contraste en frottement» est le paramètre le plus significatif et donc celui à programmer pour qualifier la variation de perception du frottement. Cette étude nous a menés à concevoir un nouveau dispositif tactile appelé SmartTac, intégrant des nouveaux capteurs de force permettant de mesurer et contrôler directement le coefficient de frottement qu’il soit adaptatif au doigt du sujet. Enfin, après avoir décrit une méthode d’extraction des propriétés tribologiques de trois surfaces textiles très différentes, la simulation de ces textures est entreprise avec le SmartTac. Notre approche est testée par la réalisation d’une expérience psychophysique sur la correspondance entre surfaces simulées et surfaces réelles: un taux de réussite de 78% valide notre démarche
The friction modulation produced by ultrasonic vibrations is one of the methods which produce the tactile stimulation. The vibration amplitude is modulated depending on the finger position to give the illusion of touching a texture. This thesis aims at developing a tactile device able to simulate the sensation of touching complex textures such as textile fabrics. For this aim, we modelled first the vibration behaviour and proposed a new strategy to track the resonance frequency of the tactile device and to improve the robustness of the control. On the other hand, the relationship between the tribological aspects of interaction finger / stimulator and the perception of stimuli is assessed to define the most perceived tribological criteria. The tribological parameter named “friction contrast” is introduced. Following this tribological study, we developed a new tactile device called SmartTac integrating new force sensors to measure and control directly the coefficient of friction and to make it adaptive to the user’s finger. Last, a method for extracting the tribological properties of three various textile fabrics is applied to simulate them. Our method is validated by conducting a psychophysical experiment with a success rate of 78%, matching the simulated surfaces to real surfaces

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Liang, Ying. "Formation of continuous activated carbon fibers for barrier fabrics." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/8599.

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Petersson, Emil, and Julia Strandman. "Klippt & skuret : En studie av butikens påverkan till Do-It-Yourself-aktiviteter med textila metervaror." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-10643.

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Interior textiles have been a part of the everyday life of humans for hundreds of years, especially for women whom the creation of textiles has been a usual feature. Archeological findings from the 16th century B.C. show that tools for spinning and weaving for home usage were a part of every household. This was common until the 19th century, when the industrialization in Europe took off and the first textile industries began to establish. This was the beginning of big changes to the modern man’s lifestyle and the way we consume interior textiles. As mass produced products have taken over the market, a counter-reaction among consumers have emerged. The consumers feel a bigger need for unique products, products that feel meaningful for themselves or in any other way increases the perceived value. This has led to a growing trend for DIY-activities (Do-It-Yourself). While the sales of DIY-related products and interior design products increases, statistics shows a decrease in the sales of textile meter fabrics, which is a raw material aimed to be used for interior design and DIY-projects. It can be identified by the way that businesses are selling textile meter fabrics that the strategies haven’t changed very much in the recent decades. Therefore, it is questionable whether the meter fabric assortment is on its way to extinction or if the offer needs to change to better suit the customers’ requirements. This study has focused on what elements of the textile meter fabric offer could be changed in a store in Germany. An analysis of a selective sample of the German customer and how they use textile meter fabrics has been made, but also on how they perceive the offer in store and what they wish to be changed in the textile meter fabrics department. The interviews were conducted in an anonymous store in Frankfurt, Germany. The empirical findings have been put in relation with studies of DIY-motivations and shopping experience. An interview with a sales leader of one of the leading stores of home textiles in Germany, including meter fabrics, has been done in order to put the customers’ answers in relation to how the store work with increasing the DIY-motivations towards the customers. The study has resulted in insights about the stores lacking ability to provide the customers with enough motivation for DIY-projects in regards to textile meter fabrics. A disconnection between the vision of the store and the customers’ perception of the offer has been discovered, where the possibilities of improvement are vast. The study also shows that a majority of the interviewed German males show little or no interest in both DIY and textile meter fabrics.

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Meng, Xiaomin. "Influence of yarn and fabric construction parameters on the performance of cotton/dyneema fabrics for tent applications." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/8622.

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Molina, Pombo Juan Cruz. "Mechanical characterization of fabrics for inflatable structures." Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5844.

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Thesis (M.S.)--West Virginia University, 2008.
Title from document title page. Document formatted into pages; contains x, 107, 15 p. : ill. Includes abstract. Includes bibliographical references (p. 106-107).

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Vargantwar, Pruthesh Hariharrao. "Preparation of ionic cellulose for wrinkle resistant fabrics." NCSU, 2007. http://www.lib.ncsu.edu/theses/available/etd-04252007-154942/.

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Conventional treatment of cellulosic fabrics by formaldehyde-based cross-linkers provides improved wrinkle recovery angles (WRA) and durable press (DP) performance. But these treatments suffer from strength loss and later release of formaldehyde, a known carcinogen. Ionic crosslinking offers a potential solution to these problems, and has shown improved wrinkle recovery performance in previous studies. In the current novel method of ionic crosslinking for wrinkle resistant fabrics, the cellulosic fabric is treated with salt of mono chloroacetic acid and 3-chloro-2-hydroxypropyl trimethyl ammonium chloride (CHTAC) sequentially or in mixture to form covalently bonded anionic and cationic sites on cellulose, which are durable to washing, and which form inter/intra molecular ionic cross-links. There is no later release of hazardous chemicals involved with this treatment and improved wet WRA are obtained. Fabric treated by this method gained tensile strength and breaking strain compared to the untreated fabric. Different routes for chloroacetate treatment are presented. Pad-dry-pad-cure is the most efficient route and a functional relationship between the anionic content and the process parameters is established. Analytical techniques like confocal microscopy and scanning electron microscopy are used to confirm the morphological changes and occurrence of carboxymethylation reaction in the fiber interior.

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MacKay, W. Iain. "The development of pre-Hispanic art forms in Peru : seen as an outgrowth of textile techniques and their influence upon art forms and depiction of symbols." Thesis, University of St Andrews, 1988. http://hdl.handle.net/10023/7359.

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Pre-Hispanic geometric art forms In Peru and the Andean Area are taken to be an outgrowth of textile techniques. Textiles and fibre arts predate ceramics by several millennia In the Central Andean Area. The artist who created these textiles developed an art style which was to go largely unaltered until the arrival of the Spaniards. The foundations of the Andean art form date to the Pre-ceramic. The restrictive, rather Inflexible nature of the warp and the weft of the cloth (the geometric grid) was to influence the methods of represention that were to follow. Geometric designs were well suited to fit Into the rigid framework. A series of conventions were developed for the representation of symbols. With the development of ceramics, there was leeway for a new style to come Into being. However, this was not to be the case. The potter borrowed extensively from the weaving tradition and Its associated styles (only in Moche times did the potter make a break the highly geometric style developed centuries before, and even then this break with tradition was a short lived one). The pre-Columbian artist often portrayed birds, cats, fish and reptiles. Many of these designs were used frequently and repeatedly throughout the centuries, but none, I would maintain. was represented as frequently as the double-headed serpent, and with so few variants. Andean art Is a truly distinctive art form; very different from European art, and through Its geometricity It conveyed and still conveys a totally different approach to nature and the world surrounding Andean man.

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Moyo, Doice. "Characterisation and optimisation of waterjet impact forces and energy parameters during hydroentanglement." Thesis, Nelson Mandela Metropolitan University, 2012. http://hdl.handle.net/10948/d1020134.

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Hydroentanglement is an important technique of bonding fibres to produce nonwovens using high velocity waterjets as the primary bonding tool. The work reported in this thesis addresses the gap in scientific knowledge and understanding, both theoretical and experimental, related to the impact forces and energy of the waterjets used in the hydroentanglement process. The current study focused on the impact forces and energy involved in, and the optimisation of, the hydroentanglement process. The results of the experimentally measured waterjet impact forces have been used to characterise the waterjets as well as to verify empirically the theoretical models currently available for explaining the mechanics of the hydroentanglement process. Since the process of supplying pressurised waterjets consumes a great deal of energy, the study of energy consumption and efficiency of the system has been critical. A method was proposed and used to determine the coefficients of velocity and water discharge of an industrial machine set-up, helping explain the mechanism of energy transfer during hydroentanglement and to concurrently optimise the process. Furthermore, a response surface experimental design was used to optimise the hydroentanglement of viscose and Polylactic acid (PLA) fibres into nonwovens. The selected Box-Behnken design, with four factors, namely the waterjet force, machine processing speed, input weight and fibre type, was employed to investigate the multivariate process factors and their interactive effects on physical and mechanical properties of nonwovens. Two sets of experiments, the later for validation, were performed to study the energy transfer efficiency. The results of the relative energy transfer to bond the fibrous web showed that it was possible to produce nonwovens using lower input energy without compromising the quality of the products. The optimum waterjet pressure and machine speed used to produce the Abstract nonwoven with the highest tensile strength for the least amount of energy supplied were identified.

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Matheson, Jennifer. "[Untitled] [an exegesis submitted to the Auckland University of Technology in partial fulfilment of the degree of Master of Arts (Art and Design), 2003.]." Images, 2003.

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Lee, Hsi-Lung Stephen. "Study of the industrial through-air drying process for tufted carpet by Hsi-Lung Stephen Lee." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/8589.

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Wang, Xueqin. "Morphology distributions in thermally point bonded nonwovens." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/8696.

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Zhou, Yexin, and 周晔欣. "An efficient rotation-free triangle and its application in cloth simulations." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hub.hku.hk/bib/B50899909.

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In this thesis, an efficient rotation-free (RF) triangle is proposed and applied to drape/cloth simulations in which the cloth often under large displacements and rotations. The RF model is a class of thin plate/shell computational models possessing only 3 translational degrees of freedom per director whilst their domains of influence are larger than their domains of integration. An important advantage of RF models is that they do not use rotational degrees of freedom and, thus, are not plagued by the complication in finite rotations. Among the quadrilateral and triangular RF models, the latter possesses no practical restriction on the nodal distribution and appears to be a good candidate for drape/cloth simulations. The geometrical linear formulation of the RF model is firstly considered. For straight beams and plates, the curvature is directly obtained through a complete quadratic interpolation of the transverse deflection. For linear curved beams and shells, the curvature change is again derived by the interpolation and the transverse deflection is through projection. The linear RF model is then extended to the geometrical nonlinear analyses by using the corotational framework as well as the small strain and small curvature assumptions. For the RF straight beam and plate, constant tangential bending stiffness matrices which do not need to be updated during the iterative solution process are derived. For the RF curved beam and shell, the bending energies and bending internal forces become a bit complicated. However, the tangential bending stiffness matrices can still be approximated by using the constant matrices as if they are initially straight/flat. The constant approximation exhibits negligible adverse effect on the convergence. Comparing with other exiting RF models, the present RF triangle is simple and physical yet its accuracy is competitive. In its application to static drape simulations, realistic drape configurations with obvious folds are predicted. The RF beam is extended to consider static and dynamic analyses of cable structures. Under the same nodal distributions, the present RF model can tolerate larger load increment and time step in static and explicit dynamic analyses, respectively, with respect to the two-node C0beam finite element model. For virtual sewing and dynamic cloth simulations, an integrated system is developed by synergizing the RF triangle, explicit time integration, adaptive remeshing, collision handling, human body modeling, sewing forces and a supplementary bending energy to suppress the non-physical sharp fold formation. The predicted steady-state configurations of the garments after sewing appear to be realistic and agree with our daily perception. The predictions for cloth dynamic deformations on human body model also look realistic and natural. This thesis proposes a simple and efficient rotation-free triangle which is especially suitable for the problems involving large displacements and rotations. Its application in drape/cloth simulations and integration of various techniques in cloth simulations are explored. The present study is of significance in cloth simulations.
published_or_final_version
Mechanical Engineering
Doctoral
Doctor of Philosophy

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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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Dissertations / Theses on the topic 'Textile fabrics'

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