TY  - JOUR
T1  - The Effect of Fabrıc Structural Geometry on Thermal Transfer Performance in Sportswear
TT  - The Effect of Fabrıc Structural Geometry on Thermal Transfer Performance in Sportswear
AU  - Güney, Sertaç
AU  - Balcı, Hilal
AU  - Üçgül, İbrahim
PY  - 2019
DA  - December
DO  - 10.31590/ejosat.629477
JF  - Avrupa Bilim ve Teknoloji Dergisi
JO  - EJOSAT
PB  - Osman SAĞDIÇ
WT  - DergiPark
SN  - 2148-2683
SP  - 711
EP  - 717
IS  - 17
LA  - en
AB  - Especially for textiles, whichcontain open structure pores, airflow carrying heat energy transfers from oneside to another side by conduction and convection. Convective heat transferplays a very important role in thermal transfer performance of textiles due toits porous structure. Compression sportswear are generally produced fromknitted porous stretch fabrics, which get extended on wearing and remain in theextended state. Since they are worn next to skin and are direct contact withthe body surface, their thermal comfort properties are effective on overallclothing comfort. Perhaps the greater contact of the garment to the skintogether with the constant airflow can transfer the heat better from the bodyto the environment. Most of the well-known auxetic materials possess porousmicrostructures and the sizes of the pores of auxetic materials can vary duringthe compressive and tensile deformation. In this study, an investigation hasbeen made to evaluate the auxetic effect on the thermal transfer performance ofclothing. Two type fabrics having the very similar fabric properties butdifferent knitting structures were provided from the market and producer. Whileone has an auxetic structure, the other has a standard warp knitting structurecommonly used in market. As Permeability and porosity are strongly related toeach other, we compared air permeability of fabrics in extended stateconsidering the fabric extension results taken from virtual avatar having thesame body measurements as subjects in 3D simulation. Fabric surface temperaturechanges on different clothed body parts investigated by an infrared thermalcamera and analysed in thermal camera software (Flir Tools) for thermaltransfer performance according to the wearing protocol.
KW  - Fabric structural geometry
KW  - auxetic structure
KW  - thermal comfort
N2  - Especially for textiles, which contain open structure pores, airflow carrying heat energy transfers from one side to another side by conduction and convection. Convective heat transfer plays a very important role in thermal transfer performance of textiles due to its porous structure. Compression sportswear are generally produced from knitted porous stretch fabrics, which get extended on wearing and remain in the extended state. Since they are worn next to skin and are direct contact with the body surface, their thermal comfort properties are effective on overall clothing comfort. Perhaps the greater contact of the garment to the skin together with the constant airflow can transfer the heat better from the body to the environment. Most of the well-known auxetic materials possess porous microstructures and the sizes of the pores of auxetic materials can vary during the compressive and tensile deformation. In this study, an investigation has been made to evaluate the auxetic effect on the thermal transfer performance of clothing. Two type fabrics having the very similar fabric properties but different knitting structures were provided from the market and producer. While one has an auxetic structure, the other has a standard warp knitting structure commonly used in market. As Permeability and porosity are strongly related to each other, we compared air permeability of fabrics in extended state considering the fabric extension results taken from virtual avatar having the same body measurements as subjects in 3D simulation. Fabric surface temperature changes on different clothed body parts investigated by an infrared thermal camera and analysed in thermal camera software (Flir Tools) for thermal transfer performance according to the wearing protocol.
CR  - Liu, R., Little, T. and Williams, Jr., Compression Form-fitted Athletic Wear: Pressure Performance, Moisture Management Properties under Different Tension Ratios and Corresponding Psychophysical Responses, Fiber and Polymers, (2014), Vol.15 (3), pp.632-644.
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CR  - Ma, P., Chang, Y., Boakye, A. and Jiang, G., (2017), Reviw on the knitted structures with auxetic effect, The Journal of The Textile Institute, Vol.108, 6, 947-961.
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CR  - Hu H, Wang Z, Liu S (2011) Development of auxetic fabrics using flat knitting technology. Text Res J 81: 1493-1502.
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CR  - Ugbolue SC, Kim YK, Warner SB, Fan Q, Yang C, et al. (2012) Engineered warp knit auxetic fabrics. Text Sci Eng 2.
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CR  - Ma, P., Chang, Y., & Jiang, G. (2015). Design and fabrication of auxetic warp-knitted structures with a rotational hexagonal loop. Textile Research Journal.
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UR  - https://doi.org/10.31590/ejosat.629477
L1  - https://dergipark.org.tr/en/download/article-file/850786
ER  -