The Experts below are selected from a list of 165 Experts worldwide ranked by ideXlab platform
Yiming Liu - One of the best experts on this subject based on the ideXlab platform.
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Helical core-sheath Elastic Yarn-based dual strain/humidity sensors with MXene sensing layer
Journal of Materials Science, 2020Co-Authors: Lihong Wang, Mingwei Tian, Yuying Zhang, Fengqiang Sun, Yiming LiuAbstract:Flexible, stretchable and sensitive textile-based sensors play important roles in a wide variety of artificial intelligence because of its seamless integration with clothing and good comfort. Herein, MXene sensing layer is deposited on the surface of springlike helical core-sheath polyester Yarns thanks to the capillarity effect and its intrinsic hydrophilic ability, and the resultant strain sensor and humidity sensor exhibit wide detection range from 0.3 to 120% strain and 30–100% relative humidity (RH) detection, owing to Elastic core-sheath structures. The strain sensor shows excellent reproducibility (over 10000 cycles) and fast response time (120 ms). The core-sheath Yarn sensor can detect various human motions such as walking, bending and twisting as well as physiological signal (pulse), which have great potential in real-time precise medicine and health care. The Yarn sensor could also be an excellent humidity sensor because of the high specific area structure of Yarn and intrinsic hydrophilic properties of MXene sensing layer.
Jintu Fan - One of the best experts on this subject based on the ideXlab platform.
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Pressure evaluation of 3D seamless knitted bras and conventional wired bras
Fibers and Polymers, 2009Co-Authors: Rong Zheng, Jintu FanAbstract:Seamless knitting for making bras is a novel approach. The fitting evaluation of these products remains unknown and there is limited knowledge about the effects of knitting parameters on the bra tension. This study developed 3 styles of seamless knitted bras with various loop length and Elastic Yarn tension based on a 22 full factorial experimental design with one additional centre level. Therefore, a total of 3 × 5= 15 new seamless bra samples have been knitted. The skin pressure exerted by the new bras was compared with 4 commercial bras including 2 “cut and sewn” wired bras and 2 seamless knitted bras. Six women subjects of breast size 75B* in our newly developed breast sizing system were invited to wear all the bra samples. The skin pressure exerted by the bra was measured by the Novel pliance-X pressure sensors on 11 body positions. The results indicated that newly developed seamless bras showed lower pressure than the commercial bras, but had a considerably higher pressure at the cup base point. The new seamless bras with the largest loop length presented the lowest pressure values. Furthermore, empirical equations were established to predict 2 critical pressure points at “apex” and “side bottom band” from two major knitting parameters. This study provides the new knowledge of seamless knitted bra fitting and the resulted bra pressure, as well as some guidelines for seamless knitted product design and manufacturing.
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Prediction of seamless knitted bra tension
Fibers and Polymers, 2008Co-Authors: Rong Zheng, Jintu FanAbstract:Seamless knitting, as a new technology, has a great potential in the development of lingerie products. Bra knitting using seamless knitting technology is a difficult engineering problem due to the lack of knowledge on how to achieve proper underband tension and cup strain for optimal comfort and shape. In this study, we aim at identifying the key knitting parameters and experimentally investigating their relationships with the knitted bra tension. The knitting parameters under investigation were loop density, Elastic Yarn tension, cover Yarn tension and nylon Yarn tension. Factorial experimental design was used to explore the most significant factors affecting the underband tension and cup strain of seamless knitted bra. The results show that the loop density and Elastic Yarn tension were the two main factors affecting the underband tension. The cup strain was mainly affected by the loop density. Empirical prediction equations have been established to estimate the underband tension and cup strain from knitting parameters.
Hu H - One of the best experts on this subject based on the ideXlab platform.
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Development of weft-knitted spacer fabrics with negative stiffness effect in a special range of compression displacement
SAGE Publications, 2015Co-Authors: Chen F, Hu H, Yp LiuAbstract:Negative stiffness refers to a negative ratio of the force to the displacement in a deformed material system. It can be very useful in the design and fabrication of vibration isolation systems. In this study, a new kind of weft-knitted spacer structure that can achieve negative stiffness under compression was specially developed by using Elastic Yarn to knit the outer layers of spacer structure. Twelve fabric samples were knitted on an electronic flat knitting machine with three different linking distances and four diameters of spacer monofilaments. The compression tests were conducted to verify the negative stiffness effect of the fabrics after a steaming treatment. The results obtained have shown that the negative stiffness effect can be obtained for weft-knitted spacer fabrics in a special range of compression displacement if suitable fabric structure and fiber materials are used, and the decrease of the linking distance of spacer monofilaments can enhance the negative stiffness effect. It is expected that this study could provide useful information in the design and fabrication of spacer fabrics for vibration isolation.Institute of Textiles and Clothin
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The use of a polytrimethylene terephthalate/polyester bi-component filament for the development of seamless garments
SAGE Publications, 2013Co-Authors: Li Z, Hu H, She J, Rong HAbstract:Seamless garments are popular knitted products nowadays. They are widely used as power stretchable underwear, outerwear and sportswear for which the use of high Elastic Yarns is indispensable . For seamless garments knitted with circular seamless machines, polyurethane (PU)/polyamide (PA) core-spun Yarn is commonly used as the base Yarn in a plating fabric to enhance the Elasticity of the garment. However, the use of PU/PA core-spun Yarn has encountered some problems, such as the difficulty in size control and the ageing of PU Elastic Yarn. In this study, the polytrimethylene terephthalate (PTT)/polyester (PET) bi-component filament was used to replace the PU/PA core-spun Yarn for the development of seamless garments due to its excellent extensibility and Elastic recovery property. The manufacturing processes, including knitting, pre-treatment, dyeing and finishing, were developed, and the end-use performance of the fabrics, which were respectively produced with the PTT/PET bi-component filament and PU/PA core-spun Yarn as the base Yarn and PA fiber as the face Yarn for seamless garments, was compared based on the five different mechanical and physical properties. The results show that the fabric made of the PTT/PET bi-component filament has much better dimensional stability, much better Elastic recovery property and much better wrinkle resistance than those of the fabric made of PU/PA core-spun Yarn. It is expected that this study could help us to further exploit the use of the PTT/PET bi-component filament in the development of seamless garments in the future.Institute of Textiles and Clothin
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The use of a polytrimethylene terephthalate/polyester bi-component filament for the development of seamless garments
'SAGE Publications', 2013Co-Authors: Li Z, Hu H, She J, Rong HAbstract:Seamless garments are popular knitted products nowadays. They are widely used as power stretchable underwear, outerwear and sportswear for which the use of high Elastic Yarns is indispensable . For seamless garments knitted with circular seamless machines, polyurethane (PU)/polyamide (PA) core-spun Yarn is commonly used as the base Yarn in a plating fabric to enhance the Elasticity of the garment. However, the use of PU/PA core-spun Yarn has encountered some problems, such as the difficulty in size control and the ageing of PU Elastic Yarn. In this study, the polytrimethylene terephthalate (PTT)/polyester (PET) bi-component filament was used to replace the PU/PA core-spun Yarn for the development of seamless garments due to its excellent extensibility and Elastic recovery property. The manufacturing processes, including knitting, pre-treatment, dyeing and finishing, were developed, and the end-use performance of the fabrics, which were respectively produced with the PTT/PET bi-component filament and PU/PA core-spun Yarn as the base Yarn and PA fiber as the face Yarn for seamless garments, was compared based on the five different mechanical and physical properties. The results show that the fabric made of the PTT/PET bi-component filament has much better dimensional stability, much better Elastic recovery property and much better wrinkle resistance than those of the fabric made of PU/PA core-spun Yarn. It is expected that this study could help us to further exploit the use of the PTT/PET bi-component filament in the development of seamless garments in the future.Institute of Textiles and Clothing2013-2014 > Academic research: refereed > Publication in refereed journa
Rong H - One of the best experts on this subject based on the ideXlab platform.
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The use of a polytrimethylene terephthalate/polyester bi-component filament for the development of seamless garments
SAGE Publications, 2013Co-Authors: Li Z, Hu H, She J, Rong HAbstract:Seamless garments are popular knitted products nowadays. They are widely used as power stretchable underwear, outerwear and sportswear for which the use of high Elastic Yarns is indispensable . For seamless garments knitted with circular seamless machines, polyurethane (PU)/polyamide (PA) core-spun Yarn is commonly used as the base Yarn in a plating fabric to enhance the Elasticity of the garment. However, the use of PU/PA core-spun Yarn has encountered some problems, such as the difficulty in size control and the ageing of PU Elastic Yarn. In this study, the polytrimethylene terephthalate (PTT)/polyester (PET) bi-component filament was used to replace the PU/PA core-spun Yarn for the development of seamless garments due to its excellent extensibility and Elastic recovery property. The manufacturing processes, including knitting, pre-treatment, dyeing and finishing, were developed, and the end-use performance of the fabrics, which were respectively produced with the PTT/PET bi-component filament and PU/PA core-spun Yarn as the base Yarn and PA fiber as the face Yarn for seamless garments, was compared based on the five different mechanical and physical properties. The results show that the fabric made of the PTT/PET bi-component filament has much better dimensional stability, much better Elastic recovery property and much better wrinkle resistance than those of the fabric made of PU/PA core-spun Yarn. It is expected that this study could help us to further exploit the use of the PTT/PET bi-component filament in the development of seamless garments in the future.Institute of Textiles and Clothin
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The use of a polytrimethylene terephthalate/polyester bi-component filament for the development of seamless garments
'SAGE Publications', 2013Co-Authors: Li Z, Hu H, She J, Rong HAbstract:Seamless garments are popular knitted products nowadays. They are widely used as power stretchable underwear, outerwear and sportswear for which the use of high Elastic Yarns is indispensable . For seamless garments knitted with circular seamless machines, polyurethane (PU)/polyamide (PA) core-spun Yarn is commonly used as the base Yarn in a plating fabric to enhance the Elasticity of the garment. However, the use of PU/PA core-spun Yarn has encountered some problems, such as the difficulty in size control and the ageing of PU Elastic Yarn. In this study, the polytrimethylene terephthalate (PTT)/polyester (PET) bi-component filament was used to replace the PU/PA core-spun Yarn for the development of seamless garments due to its excellent extensibility and Elastic recovery property. The manufacturing processes, including knitting, pre-treatment, dyeing and finishing, were developed, and the end-use performance of the fabrics, which were respectively produced with the PTT/PET bi-component filament and PU/PA core-spun Yarn as the base Yarn and PA fiber as the face Yarn for seamless garments, was compared based on the five different mechanical and physical properties. The results show that the fabric made of the PTT/PET bi-component filament has much better dimensional stability, much better Elastic recovery property and much better wrinkle resistance than those of the fabric made of PU/PA core-spun Yarn. It is expected that this study could help us to further exploit the use of the PTT/PET bi-component filament in the development of seamless garments in the future.Institute of Textiles and Clothing2013-2014 > Academic research: refereed > Publication in refereed journa
Mohsen Nami - One of the best experts on this subject based on the ideXlab platform.
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effects of draw ratio and Elastic core Yarn positioning on physical properties of Elastic wool polyester core spun ring Yarns
Journal of The Textile Institute, 2007Co-Authors: Ali Kakvan, Ghazi R Saidi, Saeed Shaikhzadeh Najar, Mohsen NamiAbstract:Abstract In this article, the draw ratio of Elastic core Yarn (Spandex filament 44 dtex/f4) was regulated from 2.7 to 4.41 (i.e., 2.7, 3.22, 3.49, and 4.41) by using a developed positive feed drive and a microcontroller system. The Elastic core positioning (left, center, and right) in front roller nip of ring frame was also changed using a standard V-groove guide roller. The physical properties of produced Yarns including tensile properties, hairiness, irregularity, and fibre covering were investigated and compared. The results revealed that at 3.49 draw ratio, themaximum Elastic core-spun Yarn tenacity and elongation and minimum S3 hairiness values were obtained compared with 2.7 and 4.41 draw ratios. The results indicated that increasing the Elastic Yarn draw ratio increased the Elastic core-spun Yarn irregularity and fibre-covering factor by which the highest values were obtained at 4.41 Elastic Yarn draw ratio. It was also found that Elastic Yarn positioning at the left edge of roving ribbon deteriora...
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Effects of draw ratio and Elastic core Yarn positioning on physical properties of Elastic wool/polyester core-spun ring Yarns
Journal of the Textile Institute, 2007Co-Authors: Ali Kakvan, Saeed Shaikhzadeh Najar, R. Ghazi Saidi, Mohsen NamiAbstract:Abstract In this article, the draw ratio of Elastic core Yarn (Spandex filament 44 dtex/f4) was regulated from 2.7 to 4.41 (i.e., 2.7, 3.22, 3.49, and 4.41) by using a developed positive feed drive and a microcontroller system. The Elastic core positioning (left, center, and right) in front roller nip of ring frame was also changed using a standard V-groove guide roller. The physical properties of produced Yarns including tensile properties, hairiness, irregularity, and fibre covering were investigated and compared. The results revealed that at 3.49 draw ratio, themaximum Elastic core-spun Yarn tenacity and elongation and minimum S3 hairiness values were obtained compared with 2.7 and 4.41 draw ratios. The results indicated that increasing the Elastic Yarn draw ratio increased the Elastic core-spun Yarn irregularity and fibre-covering factor by which the highest values were obtained at 4.41 Elastic Yarn draw ratio. It was also found that Elastic Yarn positioning at the left edge of roving ribbon deteriora...