Effect of Stitch Characteristics on Flammability and Thermo-Physiological Comfort Properties of Knitted Fabrics
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ISSN 1229-9197 (print version) ISSN 1875-0052 (electronic version)
Effect of Stitch Characteristics on Flammability and Thermo-Physiological Comfort Properties of Knitted Fabrics Rajesh Mishra1*, Hafsa Jamshaid2, Sikander Abbas Basra2, Gaoming Jiang3, Zhe Gao3, Pibo Ma3, Michal Petru4, Ali Raza2, and Miroslav Muller1 1
Faculty of Engineering, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Praha-Suchdol, Czech Republic 2 Protective Textile Group, National Textile University, Faisalabad 37610, Pakistan 3 Engineering Research Center for Knitting Technology, Jiangnan University, Wuxi 214000, China 4 Department of Machinery Construction, Institute for Nanomaterials, Advanced Technology and Innovation, Technical University of Liberec, Liberec 46117, Czech Republic (Received December 20, 2019; Revised February 12, 2020; Accepted February 18, 2020) Abstract: Investigations on influence of stitch types in single jersey knitted fabric on flammability and comfort properties are carried out in this paper. Seven different knitted structures were developed on single jersey machine. In this study the effect of combinations of knit, miss and tuck stitches on comfort and flammability properties of knitted fabrics are investigated. Flammability test/properties e.g. afterglow time, char length, and weight loss % are evaluated. Several tests for thermophysiological comfort i.e. air permeability, thermal resistance and absorbency are also carried out. Results obtained show that both comfort and flammability properties are dependent on type of stitch, pattern of stitch, location of stitch and percentage of any stitch used in the fabrics. Moreover, fabric physical parameters also affect the flammability and comfort properties. The findings of this study shall work as a guide for material or textile engineers in the design and selection of fabric for apparel as well as high performance thermal protective clothing; as a result safety and occupational health of fire fighters will be improved. Keywords: Air permeability, Thermal resistance, Flammability, Char length, Afterglow time
carried out. Some researchers investigated the static water absorption, one of the comfort properties on pure yarn and plated yarn with elastane thread on static water absorption. It was observed that knits produced with pure yarn exhibit higher water absorption followed by those with textured polyamide yarn as a raw material and lowest for elastane raw material oriented knits. Knits with higher tightness factor exhibit worst in terms of water absorption. In another study it is investigated that the garment flammability is influenced by knit structure i.e. the number of yarns in a loop and the results are compared with those of a multilayer packet [4,5]. In another research authors explored, influence of knit structure, i.e. tightness factor, linear density of yarns and loop length of the knit on garment permeability to air and flammability [6,7]. Mostly natural fibers have low fire retardancy as compared to the man-made fibers but the fabric kni
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