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Samanta A.K.,Wool Research Association
Indian Journal of Fibre and Textile Research | Year: 2014

Effect of wool/polyester blend ratio on the evenness characteristics of yarn has been studied. Yarns with two different counts have been spun from each of four different blend ratios of polyester/wool in conventional worsted processing system and thereafter evenness and imperfection properties are studied. It is observed that yarn becomes more even with the increase in polyester content in the blend. Source


Kadam V.V.,Central Sheep and Wool Research Institute | Goud V.,Wool Research Association | Shakyawar D.B.,Central Sheep and Wool Research Institute
Indian Journal of Fibre and Textile Research | Year: 2013

Wool scoured using ultrasound irradiation at intermediate stages has been analysed and compared with the wool scoured without ultrasonic energy. The conventional recipe is modified with 25% reduction in chemical concentration, time and temperature. The scouring efficiency is measured in terms of residual grease content. Ultrasound energy effectively removes grease with lower concentration of chemicals, temperature and time. Ultrasound subjected to all bath scouring has lowest residual grease content. However, the highest improvement in whiteness is observed during ultrasound irradiation on rinsing baths. It is also observed that the combination of ultrasound and alkali adversely affects whiteness and yellowness. Scanning electron microscope analysis shows no cuticle damage after ultrasound exposure on wool fibre. In addition, the chemical properties of wool are not changed due to ultrasound treatment. The mean fibre diameter, single fibre strength and moisture content do not show significant change after ultrasound irradiation. Source


Goud V.S.,Wool Research Association
Colourage | Year: 2010

This paper deals with brief introduction of auxetic textiles; manufacturing and applications of auxetic polymers (fibres), auxetic yarns and auxetic fabrics. Auxetic materials belong to a class of extraordinary materials that become fatter when stretched. These are characterised by negative Poisson's ratio. Auxetic materials have properties such as high impact resistance, fracture toughness, energy absorption and ability to change porosity with applied strain. These properties make the auxetic materials highly suitable for a wide variety of applications such as auxetic fibre reinforced composites, smart bandages for controlled release of drugs, military gear like bullet-proof helmets, auxetic filters and many more. Source


Goud V.S.,Wool Research Association
Indian Journal of Fibre and Textile Research | Year: 2012

Wool fabric has been treated with low-temperature plasma using a di-electric barrier discharge plasma reactor under atmospheric pressure. Air was used as the non-polymerizing gas for plasma treatment. The effect of plasma process parameters, viz voltage (4.0, 4.5, 5.0 and 5.5 kV) and the inter-electrode spacing (2, 3 and 4 mm) on the properties of wool fabric has been studied. Breaking strength, breaking elongation and low-stress mechanical properties of the treated and untreated wool fabrics are evaluated. Surface topographical changes after plasma treatment of wool have been assessed by scanning electron microscopy. It is found that the tensile, bending, compression, shear, and surface properties depend on the applied voltage and the inter-electrode spacing. As the applied voltage across the electrodes is increased and the inter-electrode spacing is decreased, the etching effect of active species in plasma over the wool substrate is increased. This results in improved tensile properties at breaking load, increased bending and shear rigidity, and decreased extension at low loads. Source


Samanta A.K.,Wool Research Association
Journal of the Textile Association | Year: 2011

Tensile property of textile yarns is a prime important parameter in determining the suitability for any particular application. It is therefore of utmost importance to determine this characteristic accurately. There are three basic principles for measuring yarn tensile strength. But for measuring single yarn tensile strength mainly constant rate of extension (CRE) and constant rate of loading (CRL) principles are used. A single yarn shows two different results of breaking load and elongation value in these two methods due to the difference in measuring system. In this article a comparative study is carried out between these two methods. Source

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