Browsing by Author "Zubair, Muhammad"
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- ItemCationization of cellulose fibers for composites(2017-01-04) Maqsood, Hafiz Shahzad; Bashir, Uzma; Zubair, Muhammad; Wiener, Jakub; Militký, JiříIn this work, composites were made by improved bonding of the cationized cellulosic fabric and some anionic matrix like Carboxymethyl Cellulose (CMC). Mercerized cotton fabric was cationized using cationization agent, TEXAMIN ECE with varying percentage from 1 to 10%. Those cationized cotton samples were incorporated in anionic matrices and the resultant composites were tested for mechanical properties on Universal Textile Tensile Testing machine. In the case of CMC as the matrix for the cationized reinforcement, the increasing trend in the tensile strength and elongation at break was observed. Scanning Electron Microscope images showed no extraordinary changes in the physical appearance of the cationized samples. Thermograms derived from Differential Scanning Calorimetry were informative for the evaluation of the thermal behavior of composites. © 2016 The Textile Institute
- ItemImpact of filling yarns on woven fabric performance(2017-01-04) Zubair, Muhammad; Maqsood, Hawsood Shahzad; Neckář, BohuslavWork wear woven fabrics have wide application in the area of sports, industrial textiles and defense. The performance characteristics of these fabrics are important with respect to their specific application. To improve the performance of woven work wear fabrics, different compositions of weft yarns with polyester/cellulosic material were used to produce fabric specimens on a picanol air jet loom. The effect of the composition on the tensile strength, tear strength and pilling of woven fabric specimens was studied. It was concluded that the fabric with a higher composition of modal and polyester produced better tensile strength in group G-1 as well as in group G-2. The fabric produced with modal as weft yarn also exhibited higher tear strength along the filling direction. The effect of pilling was also studied and it was found that modal and combed cotton produced low pilling as compared with other materials. © 2016, Institute of Biopolymers and Chemical Fibres. All rights reserved.
- ItemTahové chovaní staplových přízí(Technická Univerzita v Liberci, 2017) Zubair, Muhammad; Neckář, Bohuslav
- ItemTensile behavior of staple fiber yarns, part IV: experimental verification of predicted stress–strain curves(2017-01-04) Zubair, Muhammad; Neckář, Bohuslav; Eldeeb, Moaz; Baig, Gulzar A.In this paper, specific stress–strain curves were predicted for viscose, cotton, and polyester yarns spun by ring and rotor technologies. The average fiber-specific stress–strain curves were used to predict yarn-specific stress–strain curves. The predicted yarn-specific stress–strain curves captured the experimental yarn-specific stress–strain curves well both in shape and position for the three studied yarn types. However, higher prediction error was observed relatively in polyester yarns due to more slippage of fibers in these yarns. All rotor yarns exhibited higher difference between experimental and predicted results which might be the result of the nature of the twist in rotor yarn. © 2016 The Textile Institute
- ItemTensile behavior of staple fiber yarns part III: comparison of mathematical models(2017-01-04) Zubair, Muhammad; Eldeeb, Moaz; Neckář, BohuslavDespite the development of artificial neural network and computer simulation models that predict yarn tensile properties, the mathematical model is still very important being the base for all models. In this research, three mathematical models have been applied for evaluation of coefficient of fiber strength utilization in staple spun yarns before break at same value of yarn strains. The experiments were conducted on cotton, viscose and polyester fibers, and yarns. The results indicated that our model exhibited least prediction error followed by Pan’s and Frydrych’s models for cotton and viscose but for polyester, Pan’s model produced least error followed by Frydrych’s model and our model. The superiority of our model might be resulted from the introduction of the phenomena of fiber directional distribution in the staple spun yarns. © 2016 The Textile Institute