http://nopr.niscair.res.in/handle/123456789/288 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/410 Title: Imparting antimicrobial and fragrance finish on cotton using chitosan with silicon softener <br/> <br/>Authors: Karolia, Anjali; Mendapara, Snehal <br/> <br/>Abstract: Chitosan has been used in combination with citric acid and silicon softener to impart antimicrobial and fragrance finish with two different application techniques. It is observed that the finish provides better functionality to the fabric as it shows good performance and improvement in physical properties. The finish shows good fastness to washing as well as perspiration. The use of carboxylic acid also improves the affinity of chitosan for cellulose <br/> <br/>Page(s): 99-104 Mon, 26 Feb 2007 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/408 Title: Antimicrobial activity of cotton fabric treated with Quercus infectoria extract <br/> <br/>Authors: Gupta, Deepti; Laha, Ankur <br/> <br/>Abstract: Cotton fabric has been treated with the tannin-rich extract of Quercus infectoria (QI) plant in combination with alum, copper and ferrous mordants and then tested for antimicrobial activity against Gram- positive and Gram-negative bacteria. QI extract shows good activity at 12% concentration (owf), inhibiting the microbial growth by 45-60%. The microbial growth inhibition increases to 70-90% when alum and copper sulphate are used for mordanting. However, the antimicrobial activity is completely lost when ferrous sulphate is used. The activity of samples treated with QI alone is lost completely after 5 launderings while the mordanted samples retain nearly 100% activity up to 5 launderings, indicating that the mordants help to make the effect durable. The study also shows that the cotton textiles can be successfully treated with QI to produce bioactive textiles from natural ecofriendly materials. QI is a viable alternative to synthetic antimicrobial agents for use in hospital textiles and an effective antiodour agent for use in sports and household textiles. <br/> <br/>Page(s): 88-92 Mon, 26 Feb 2007 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/406 Title: Geometrical modelling of plain weft knitted fabrics <br/> <br/>Authors: Vassiliadis, Savvas G <br/> <br/>Abstract: The accuracy of the prevailing geometrical models of the plain weft knitted fabrics is estimated and a more precise model for the use in computational modelling produced. The new proposed model is based on the assumptions of the ideal elastic yarn and the elastic energy minimization of the yarns composing the relaxed fabrics. Thus, a repeated calculation process is used for the selection of the loop shape corresponding to the minimum loop length. The accuracy of the models is evaluated using the loop length as criterion. Based on the structural data of an extended set of samples, the loop length for every model is calculated. These values are compared to the respective experimentally measured ones. The accuracy of the new proposed model guarantees the success of the mechanical simulation of the knitted fabrics. <br/> <br/>Page(s): 62-71 Mon, 26 Feb 2007 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/403 Title: Effect of some nozzle parameters on the characteristics of jet ring-spun yarns <br/> <br/>Authors: Subramanian, S N <br/> <br/>Abstract: The effect of single, double and triple air-jet nozzles of different materials, such as brass, aluminium and teflon, on the characteristics of jet ring - spun yarns has been studied. Regular and jet ring-spun yarns of 19.68 tex, 14.76 tex and 11.81 tex have been produced and then tested for hairiness, tensile and evenness properties. Surface features of all these yarns are compared by scanning electron microscopic studies. It is observed that the jet ring-spun yarns display lower hairiness and higher tenacity. The study further suggests that for achieving a reduction in hairiness and good strength with better evenness properties, the use of single brass nozzle will suffice which would lead to considerable reduction in quantity of air used and enable the piecing to be done more easily in ring frame. <br/> <br/>Page(s): 47-52 Mon, 26 Feb 2007 22:58:59 GMT