@article{li_powell_michielsen_2020, title={Print clarity on digitally printed textiles - a quantitative evaluation}, volume={111}, ISSN={["1754-2340"]}, url={http://dx.doi.org/10.1080/00405000.2019.1622273}, DOI={10.1080/00405000.2019.1622273}, abstractNote={Abstract Print clarity of a digitally printed product has great impact on the final esthetic appearance and performance of the printed products. Print clarity on various textile substrates is considered as image sharpness in this research. The current standard test method is a subjective test where a printed fabric is evaluated visually by one or more human subjects. To advance digital printing of textiles further, it is critical to create a quantitative evaluation method for testing print clarity (sharpness), as has been done with paper. In this paper, a quantitative evaluation of the print clarity (sharpness) of a digitally printed test pattern on textiles was created. Different colors, directions, and fabrics (substrates) were considered in the design of experiment. Eight similar weight and structure woven polyester samples along with a paper substrate were printed with MS JP7 printers using nano-pigments and printed in two directions. The resulting prints were scanned with an EPSON Expression 11000XL Photo Scanner. Several software packages, including Image-Pro and MatLab, were used to process data to analyze and compare image contrast of the test pattern under different conditions. Improved print clarity in digital printing on polyester woven fabric was explored. The newly developed test method is a quantitative test method that makes optimization of the print quality (sharpness) easier and more accurate.}, number={1}, journal={JOURNAL OF THE TEXTILE INSTITUTE}, publisher={Informa UK Limited}, author={Li, Xingyu and Powell, Nancy B. and Michielsen, Stephen}, year={2020}, month={Jan}, pages={108–121} } @article{lim_powell_lee_michielsen_2017, title={Geometric impact of void space in woven fabrics on oil resistance or repellency}, volume={52}, ISSN={["1573-4803"]}, url={http://dx.doi.org/10.1007/s10853-017-1022-9}, DOI={10.1007/s10853-017-1022-9}, number={13}, journal={JOURNAL OF MATERIALS SCIENCE}, publisher={Springer Science and Business Media LLC}, author={Lim, Jihye and Powell, Nancy and Lee, Hoonjoo and Michielsen, Stephen}, year={2017}, month={Jul}, pages={8149–8158} } @article{lim_powell_lee_michielsen_2016, title={Integration of yarn compression in modeling structural geometry of liquid resistant-repellent fabric surfaces and its impact on liquid behavior}, volume={51}, ISSN={["1573-4803"]}, DOI={10.1007/s10853-016-0001-x}, number={15}, journal={JOURNAL OF MATERIALS SCIENCE}, publisher={Springer Nature}, author={Lim, Jihye and Powell, Nancy and Lee, Hoonjoo and Michielsen, Stephen}, year={2016}, month={Aug}, pages={7199–7210} } @article{yilmaz_powell_2015, title={Biocomposite structures as sound absorber materials}, journal={Green Biorenewable Biocomposites: From Knowledge to Industrial Applications}, author={Yilmaz, N. D. and Powell, N. B.}, year={2015}, pages={161–198} } @article{choi_kim_powell_2015, title={An investigation of seam strength and elongation of knitted-neck edges on complete garments by binding-off processes}, volume={106}, ISSN={["1754-2340"]}, DOI={10.1080/00405000.2014.922243}, abstractNote={Binding off is utilized to finish a column of stitches on knitted fabric edges. A binding-off process can be performed by manual or mechanical methods involving hand knitting, overlocking, and linking processes. Binding off also can be achieved on automated flat-knitting machines by a combination of loop transfer and racking techniques. A binding-off process on the computerized knitting machinery provides several potential benefits such as minimizing labor intensive sewing or linking processes, production of constant quality products, and other benefits. However, in order to obtain the bound-off knit edges on computerized knitting machines, it is significant to not only provide appropriate values of loop lengths and machine tensions but also to choose suitable types of binding-off methods. This research introduces three different types of binding-off processes on neck edges conducted on automated complete garment knitting machines and investigates the seam strength and elongation of the neck edges by the three binding-off methods.}, number={3}, journal={JOURNAL OF THE TEXTILE INSTITUTE}, author={Choi, W. and Kim, Y. and Powell, N. B.}, year={2015}, month={Mar}, pages={334–341} } @article{eason_powell_2012, title={Color trends and factors in automotive upholstery from 1960-2020}, volume={12}, number={2}, journal={AATCC Review}, author={Eason, J. M. and Powell, N. B.}, year={2012}, pages={37–41} } @article{yilmaz_powell_banks-lee_michielsen_2012, title={Hemp-fiber Based Nonwoven Composites: Effects of Alkalization on Sound Absorption Performance}, volume={13}, ISSN={["1875-0052"]}, url={http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000309249900015&KeyUID=WOS:000309249900015}, DOI={10.1007/s12221-012-0915-0}, number={7}, journal={FIBERS AND POLYMERS}, author={Yilmaz, Nazire Deniz and Powell, Nancy B. and Banks-Lee, Pamela and Michielsen, Stephen}, year={2012}, month={Sep}, pages={915–922} } @article{yilmaz_powell_banks-lee_michielsen_2013, title={Multi-fiber needle-punched nonwoven composites: Effects of heat treatment on sound absorption performance}, volume={43}, ISSN={["1530-8057"]}, url={http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000324590000006&KeyUID=WOS:000324590000006}, DOI={10.1177/1528083712452899}, abstractNote={ Nonwovens have been increasingly used in car interiors for noise reduction. Most of these nonwovens are subjected to thermal treatments to give the nonwovens their final three-dimensional forms. Therefore, it became crucial to investigate the effects of thermal treatment on sound absorption characteristics of nonwovens. In this study, the effects of the material and treatment parameters on airflow resistivity and normal-incidence sound absorption coefficient of thermally treated three-layered nonwoven composites have been studied. The material parameters included fiber size and porosity. The treatment factors included the temperature and duration. The thermally treated three-layered nonwoven composites are classified into three types based on the material content and fiber blend. Sandwich structures consisting of polylactide/hemp/polylactide and polypropylene/glassfiber/polypropylene layers were called LHL and PGP, respectively. The sample which consisted of three layers of an intimate blend of polypropylene-glassfiber was named as PGI. Both temperature and duration of thermal treatment have been found to affect air flow resistivity and sound absorption. An increase in air flow resistivity and a decrease in sound absorption have been detected with heat treatment. A similarity has been observed between the thermal behaviors of PGP and PGI, which included the same thermoplastic polymer fiber. Variation in air flow resistivity of sandwich structure nonwoven composites increased with the increase in temperature, which was not observed in the intimate blend ones. The air flow resistivity of heat-treated nonwovens followed a steeper trend compared to unheated nonwovens per change in material parameters. In terms of treatment parameters, the difference between the thermal treatment and the melting point of the thermoplastics constituent of the nonwoven composite was found to be a significant factor on sound absorption. This effect of treatment temperature on sound absorption changed with treatment duration. The sound absorptive characteristic of the nonwoven composites in terms of sound frequency underwent a change with thermal treatment due to the structural changes with exposure to high temperature. }, number={2}, journal={JOURNAL OF INDUSTRIAL TEXTILES}, author={Yilmaz, Nazire Deniz and Powell, Nancy B. and Banks-Lee, Pamela and Michielsen, Stephen}, year={2013}, month={Oct}, pages={231–246} } @article{yilmaz_michielsen_banks-lee_powell_2012, title={Effects of Material and Treatment Parameters on Noise-Control Performance of Compressed Three-Layered Multifiber Needle-Punched Nonwovens}, volume={123}, ISSN={["1097-4628"]}, url={http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000297932300024&KeyUID=WOS:000297932300024}, DOI={10.1002/app.34712}, abstractNote={AbstractThe effects of material and treatment parameters on airflow resistivity and normal‐incidence sound absorption coefficient (NAC) of compressed three‐layer nonwoven composites have been studied. Material parameters included fiber size and porosity, and treatment factors included applied pressure and duration of compression. Fibers used included poly(lactic acid) (PLA), polypropylene (PP), glassfiber, and hemp. Three‐layered nonwoven composites were classified based on material content and fiber blend. LHL and PGP were sandwiched structures consisting of PLA/Hemp/PLA and PP/glassfiber/PP layers, respectively. PGI consisted of three layers of an intimate blend of PP and glassfiber. Statistical models were developed to predict air flow resistivity from material parameters and the change in air flow resistivity from compression parameters. Independent variables in the first model were porosity and fiber size and, in the latter model, were compressibility, pressure, and initial material parameters. An increase in air flow resistivity was found with increased compression. No significant effect of compression duration was detected. Two additional statistical models were developed for the prediction of sound absorption coefficient based on material and treatment parameters. The independent variables of the first model were air flow resistivity, thickness, and frequency, and those of the second model were compressibility, initial thickness, and initial density of the composite, diameter and density of the fiber, compression pressure, and frequency. A decrease in sound absorption coefficient was detected with increasing compression, while no effect of duration was detected. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012}, number={4}, journal={JOURNAL OF APPLIED POLYMER SCIENCE}, author={Yilmaz, Nazire Deniz and Michielsen, Stephen and Banks-Lee, Pamela and Powell, Nancy B.}, year={2012}, month={Feb}, pages={2095–2106} } @article{yilmaz_banks-lee_powell_michielsen_2011, title={Effects of Porosity, Fiber Size, and Layering Sequence on Sound Absorption Performance of Needle-Punched Nonwovens}, volume={121}, ISSN={["1097-4628"]}, url={http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000291598100069&KeyUID=WOS:000291598100069}, DOI={10.1002/app.33312}, abstractNote={AbstractThe relationships between the material parameters, i.e., the fiber fineness, porosity, areal density, layering sequence, and airflow resistivity with the normal‐incidence sound absorption coefficient of nonwoven composites consisting of three layers have been studied. The monofiber or multifiber needle‐punched nonwovens included poly(lactic acid) (PLA), polypropylene (PP), glass fiber, and hemp fibers. Air flow resistivity was statistically modeled and was found to increase with decreasing fiber size and nonwoven porosity. The former models developed for glass fiber mats in the literature were found to be inconsistent with the air flow resistance of the nonwovens reported below. The effects of the layering sequence on air flow resistivity and sound absorption were obtained. It was found that when the layer including reinforcement fibers, i.e., hemp or glass fiber, faced the air flow/sound source, the air flow resistance and the absorption coefficient were higher than the case when the layer including reinforcement fibers was farthest from the air flow/sound source. The difference was more pronounced if there was a greater difference between the resistivity values of the constituent layers of the nonwoven composite. Sound absorption coefficient was statistically modeled in terms of air flow resistivity and frequency. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011}, number={5}, journal={JOURNAL OF APPLIED POLYMER SCIENCE}, author={Yilmaz, Nazire Deniz and Banks-Lee, Pamela and Powell, Nancy B. and Michielsen, Stephen}, year={2011}, month={Sep}, pages={3056–3069} } @article{choi_powell_2008, title={The development of specialized knitted structures in the creation of resist-dyed fabrics and garments}, volume={99}, ISSN={["1754-2340"]}, DOI={10.1080/00405000701404247}, abstractNote={Abstract Seamless knitting proposes to offer numerous advantages to consumers and producers including better fit, improved performance characteristics, quick turn-around time, reduced system costs, and consistent quality. Although seamless knit is established in intimate apparel, extension of the technology to outerwear has been slow to attract consumers. One way to add value to seamless knit products is to create unique surface patterning to enhance the appearance. This research investigates the possibilities of resist-dyed structures on knitted fabrics, including garments created by computerized seamless-knitting technology. Resist-dyeing techniques have been traditionally created by numerous hand methods around the world, such as wax resist, yarn resist, and tied-fabric resist. This research shows a new analysis and interpretation of conventional tied-fabric resist methods by incorporating advanced knitting technology.}, number={3}, journal={JOURNAL OF THE TEXTILE INSTITUTE}, author={Choi, W. and Powell, N. B.}, year={2008}, pages={253–264} } @inproceedings{taylor_seyam_powell_2008, title={Three-dimensional woven composites for automotive applications}, booktitle={Recent Advances in Textile Composites}, author={Taylor, D. and Seyam, A. F. M. and Powell, N. B.}, year={2008}, pages={280–287} } @article{yilmaz_cassill_powell_2007, title={Turkish towel's place in the global market}, volume={5}, number={4}, journal={Journal of Textile and Apparel Technology and Management}, author={Yilmaz, N. and Cassill, L. and Powell, N.}, year={2007} } @article{powell_2006, title={Design management for performance and style in automotive interior textiles}, volume={97}, ISSN={["1754-2340"]}, DOI={10.1533/joti.2005.0166}, abstractNote={Abstract In the initial 100 years of automotive development, the comfort and safety of passengers have been greatly enhanced by functional textile products. The focus of this research is to (a) describe the current issues affecting innovation in the industry, (b) explore the design and development of new textile products within the transportation textiles supply chain, (c) identify types of products in use, and (d) identify market opportunities for new technologies. This research examines both the aesthetic and technical requirements for these high performance textiles in the US market. The results identified the fabric characteristics for automotive interiors application and the changes in the market factors influencing the need for innovative products. The range of textile characteristics developed within performance and cost parameters considered are fabric constructions, pattern, color, hand, luster, and scale. The demand for rapid prototyping, cost effectiveness, and streamlining of supply systems was also identified. The documentation and preservation of this knowledge is an important foundation for innovative materials and processes for the future. The results have implications for academic researchers and industry personnel in developing products to meet market demand.}, number={1}, journal={JOURNAL OF THE TEXTILE INSTITUTE}, author={Powell, N. B.}, year={2006}, pages={25–37} } @article{powell_cassill_2006, title={New textile product development: Processes, practices, and products}, volume={97}, ISSN={["1754-2340"]}, DOI={10.1533/joti.2005.0154}, abstractNote={Abstract With today's global competitive marketplace, new textile product development requires a design, marketing, materials and technology interface. An opportunity existed to examine the new textile product development processes being used by global textile companies with a variety of textile product end-uses: apparel, home textiles, transportation, industrial, nonwovens, carpets, and medical textiles. The Crawford and DiBenedetto model (2003) was used as the conceptual framework for the study and data was collected using secondary and primary data sources. A total of 24 global companies, based in the United States, comprised the sample for this study. Each company's new textile product development processes, practices, and new products were examined, with identification of key new product development concepts being utilized. Results indicated that companies were utilizing new product development (NPD) processes as a competitive tool, but are using a combination of NPD strategies to develop and launch products in the global marketplace.}, number={2}, journal={JOURNAL OF THE TEXTILE INSTITUTE}, author={Powell, N. B. and Cassill, N. L.}, year={2006}, pages={155–166} } @article{powell_2004, title={Design driven: The development of new materials in automotive interiors}, volume={3}, number={4}, journal={Journal of Textile and Apparel Technology and Management}, author={Powell, N.}, year={2004} } @article{handfield_barnhardt_powell_2004, title={Mapping the automotive textile supply chain: The importance of information visibility}, volume={3}, number={4}, journal={Journal of Textile and Apparel Technology and Management}, author={Handfield, R. and Barnhardt, R. and Powell, N. B.}, year={2004} } @article{scott_powell_2004, title={The development of woven velours for the transportation market}, volume={3}, number={4}, journal={Journal of Textile and Apparel Technology and Management}, author={Scott, M. and Powell, N.}, year={2004} } @article{mock_oxenham_seyam_powell_poudeyhimi_borneman_2003, title={Machines Italia}, volume={153}, number={6}, journal={Textile World (New York, N.Y.)}, author={Mock, G. N. and Oxenham, W. and Seyam, A. and Powell, N. and Poudeyhimi, B. and Borneman, J. M.}, year={2003}, pages={34–45} } @inproceedings{powell_2003, title={Mass customization in transportation textiles through shaped three dimensional knitting}, ISBN={9780954616205}, booktitle={Fibrous assemblies at the design and engineering interface : book of proceedings : International Textile Design and Engineering Conference, INTEDEC 2003, 22nd-24th September 2003, Heriot-Watt University, Edinburgh, UK.}, publisher={Edinburgh: Heriot-Watt University}, author={Powell, N.}, year={2003} }