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Kothari V.K.,Indian Institute of Technology Delhi | Dhamija S.,The Technological Institute of Textile and science
Journal of the Textile Institute | Year: 2010

The present study reports the effect of linear densities and profiles of polyester fibres on the physiological properties of their fabrics. Four different polyester fibre finenesses along with microdenier and four cross-sectional shapes (circular, scalloped oval, tetrakelion and trilobal) were selected to produce two sets of 2/1 twill fabrics; one composed of 100% polyester and the other 67:33 P/V blends. In studying the thermophysiological component of the clothing comfort, heat, air and moisture transmission characteristics of the fabrics were assessed. The principal thermal properties, such as thermal absorptivity, thermal resistance and thermal conductivity, were experimentally evaluated, using the Alambeta instrument. The study of the obtained results established the fabrics of non-circular cross-sections as against circular ones, and increase in the linear density results in higher thermal resistance, lower thermal conductivity and lower thermal absorptivity. Wicking behaviour of fabrics was studied under two conditions-wicking from an infinite liquid reservoir (transverse wicking) and wicking from a finite liquid reservoir (single drop wicking into the fabrics). Increase in fibre linear density enhances transplaner wicking but slows down the spreading speed of water drops. Air permeability and moisture vapour permeability are found to be positively correlated with fibre decitex. The role of fibre cross-sectional shapes in influencing mass-flow characteristics is quite considerable. Use of non-circular polyester in place of a circular one augments the wickability of liquid water along with the permeability of air and moisture vapour through the fabrics, revealing their high porosity, which assists air and moisture to propagate. Mixing viscose into polyester brings down the air permeability and moisture vapour transmission rate (MVTR) of fabrics. Results show that moisture absorption of viscose is an important factor in influencing the moisture transport characteristics including both wickability and MVTR of 100% viscose and P/V-blended fabrics. © 2010 The Textile Institute.


Mahish S.S.,Indian Institute of Technology Delhi | Punj S.K.,Indian Institute of Technology Delhi | Kothari V.K.,The Technological Institute of Textile and science
Fibers and Polymers | Year: 2010

The effect of blend percentage on comfort and handle related properties of fabrics made from polyester/viscose blended air-jet textured yarn weft were studied and the results were compared with fabrics made from polyester/viscose ring-spun yarn wefts of similar linear densities. It is observed that with increase in polyester content in the blend, the air permeability and water vapour permeability reduces whereas thermal resistance, transverse wicking and shear rigidity increases both in ring-spun yarn and textured yarn fabrics and bending rigidity increases in textured yarn fabrics. Textured yarn fabrics exhibit lower air permeability and extensibility, higher thermal resistance, relative water vapour permeability, transverse wicking values and bending rigidity as compared to the ring-spun yarn fabrics. © 2010 The Korean Fiber Society and Springer Netherlands.


Mahish S.S.,The Technological Institute of Textile and science | Punj S.K.,The Technological Institute of Textile and science | Kothari V.K.,Indian Institute of Technology Delhi
Indian Journal of Fibre and Textile Research | Year: 2010

The effect of process parameters on properties of polyester/viscose blended air-jet textured yarns has been studied. It is observed that with the increase in texturing speed the yarn physical bulk reduces, and instability and tenacity increase. With increasing air pressure or overfeed, the physical bulk and instability increase, whereas tenacity reduces. Regression equations for the prediction of air-jet textured yarns properties have also been derived. On the basis of the regression equations the optimum process parameters for producing good quality air-jet textured yarns have been obtained, considering that the yarns with lowest instability, and high bulk and tenacity are desirable. Yarn instability is accorded the highest weightage while bulk is given intermediate and tenacity the lowest weightage in order to find out the combination of parameters that will produce yarns of low instability, high bulk and high tenacity values.


Tyagi G.K.,The Technological Institute of Textile and science | Goyal A.,The Technological Institute of Textile and science | Chattopadhyay R.,Indian Institute of Technology Delhi
Indian Journal of Fibre and Textile Research | Year: 2013

The low-stress and recovery properties of ring, rotor and MJS yarns spun from tencel-polyester and tencel-cotton fibre mix have been studied. In comparison with ring and MJS yarns, rotor-spun yarns are more bulky, possess low tensile energy and resilience, lower immediate elastic recovery and have higher delayed elastic recovery and permanent deformation. Ring- spun yarns, on the other hand, possess least decay but behave poorly during abrasion test for 200 cycles. An increase in tencel content in both tencel-polyester and tencel-cotton mixes produces a compact yarn with reduced abrasion resistance, structural integrity and tensile resilience, poor recovery properties, and higher tensile energy. Generally, tencel-polyester yarns display better low-stress characteristics, except the abrasion resistance. Recovery properties have been found to significantly deteriorate with the increase in amplitude of extension regardless of yarn structure.


Patra A.K.,The Technological Institute of Textile and science | Madhu A.,The Technological Institute of Textile and science | Chakraborty J.N.,National Institute of Technology Jalandhar
Indian Journal of Fibre and Textile Research | Year: 2010

Linen fabric has been treated with xylanase and cellulase in the same bath as an alternative to conventional alkaline scouring at varying enzyme concentration and treatment time. The effect of the treatment has been evaluated in terms of improvement in whiteness, absorbency, residual lignin content, weight loss and change in fibre surface. The results obtained are found to be quite comparable with that of the conventional process. The enzyme treatment gives the required absorbency while the improvement in whiteness and residual lignin are satisfactory. A relatively lower weight loss indicates a rather benign effect of the enzymes.


Yadav J.,The Technological Institute of Textile and science | Kumar M.,The Technological Institute of Textile and science
Advances in Intelligent Systems and Computing | Year: 2016

Although Secure routing is the demand of the hour in the application of wireless sensor networks (WSN), secure routing is a challenge in itself due to the inherently limited capacities of sensor nodes. Routing attacks are a major challenge in the process of designing of effective and robust security mechanisms for WSNs. This main focus of this paper is on wormhole routing attack. The measures which have been proposed till now to counter the routing attacks suffer from flaws that essentially prove the fact that they are not good enough for use in large-scale WSN deployments. We need light weight and hard-bearing security mechanisms due to inherent limitations found in WSNs. In this paper, we discuss a wormhole detection method: WGDD (wormhole geographic distributed detection). © Springer Science+Business Media Singapore 2016.


Kaur A.,The Technological Institute of Textile and science | Sharm M.,The Technological Institute of Textile and science
Journal of the Textile Association | Year: 2011

PLM is a management strategy adopted by a company to control its collection from the point of conception to the point of sale. In a simpler way product-life-cycle (PLC) concept is linked with variations over time in the volume of sales or profit earned for a specific product category, form or brand. During this period significant cohesive marketing strategies are developed and adopted to increase the profit of company in terms of market and customer share. Companies either make strategic plans or follow the basic rules of the different life cycle phases that can be analyzed later. Further a clear cut understanding and analysis of PLC is very important. Any wrong strategy may lead to a failure of complete process planning of the products. This concept becomes even more important for "Fashion Apparels and Accessories" which have continuous change and aesthetic as the inherent characteristics. Keeping in view many software companies have introduced programme packages for fashion products managements, which are implemented by many garment manufacturers.


Neha,The Technological Institute of Textile and science | Kaushik A.,The Technological Institute of Textile and science
Advances in Intelligent Systems and Computing | Year: 2016

Large graphs having millions of vertices frequently used in many practical applications and are complicated to process. To process them, some fundamental single source shortest path (SSSP) algorithms like Dijkstra algorithm and Bellman Ford algorithm are available. Dijkstra algorithm is a competent sequential access algorithm but poorly suited for parallel architecture, whereas Bellman Ford algorithm is suited for parallel execution but this feature come at a higher cost. This paper introduces a new algorithm EBellflaging algorithm which enhances basic Bellman Ford algorithm to improve its efficiency over traditional Dijkstra algorithm and Bellman Ford algorithm and also reduces the space requirement of both the traditional approaches. © Springer Science+Business Media Singapore 2016.


Mahish S.S.,The Technological Institute of Textile and science | Patra A.K.,The Technological Institute of Textile and science | Thakur R.,The Technological Institute of Textile and science
Indian Journal of Fibre and Textile Research | Year: 2012

The functional properties of bamboo/polyester blended knitted fabrics, intended to be used for summer clothing, have been studied. It is observed that with increasing bamboo content the yarn hairiness and unevenness increase and the tenacity decreases. It is also found that the increase in bamboo content in the blend increases the ultra-violet protection factor, water vapour permeability and wickability. On the other hand, with the increase in bamboo content in the fabric there is a decrease in bursting strength, air permeability and thermal resistance. The fabrics loose their anti-bacterial property when bamboo is gradually replaced by polyester. The findings of the study suggest that polyester/bamboo blends must contain more than 80% bamboo fibres in order to retain sufficient anti-bacterial property of bamboo fibres in the fabrics.


Tyagi G.K.,The Technological Institute of Textile and science | Shaw S.,The Technological Institute of Textile and science
Indian Journal of Fibre and Textile Research | Year: 2012

The influence of high draw frame speed and its preparatory on the structure and properties of viscose ring- and air-jet spun yarns has been studied. The data indicate insignificant differences in the tensile and regularity characteristics of the yarns produced with different card drafts and the yarns made with high draw frame speed display higher strength, higher breaking extension and better regularity than the yarns made with lower draw frame speed. Furthermore, a lower second nozzle pressure is needed to reduce rigidity of air-jet yarns to acceptable limits. When compared with ring-spun yarns, air-jet yarns have significantly smaller helix angle, but display higher packing density. Of the various process variables, card draft and second nozzle pressure markedly affect mean fibre extent, helix angle and packing density, whereas draw frame speed affects each of the parameters studied in a non-distinguishable manner.

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