http://nopr.niscair.res.in/handle/123456789/10742 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/10755 Title: Electromagnetic shielding tester for conductive textile materials <br/> <br/>Authors: Perumalraj, R; Nalankilli, G; Balasaravanan, T R; Roshanraja, K; Shyamsundar, G; Dasaradan, B S <br/> <br/>Abstract: Electromagnetic shielding tester has been modified to measure the electromagnetic shielding effectiveness (EMSE) of conductive textile materials using the frequency range 500 MHz - 12 GHz. Various conductive copper filler fabrics have been produced and tested for their electromagnetic shielding effectiveness using both newly modified electromagnetic shielding tester and network analyzer tester (MIL-STD 285), and the values obtained by both the testers are compared and correlated. It is observed that the values measured by the newly modified electromagnetic tester show good EMSE than the network analyzer standard values in the high frequency range 8-12 GHz. The modified system can be used to measure the EMSE of conductive textile materials in the high frequency range 500MHz-12 GHz <br/> <br/>Page(s): 361-365 Sun, 28 Nov 2010 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/10754 Title: An apparatus for measuring the sub-nozzle efficiency of air-jet weaving machine <br/> <br/>Authors: El-Messiry, Magdi; Youssef, Shaimaa <br/> <br/>Abstract: A simple apparatus for measuring the efficiency of sub-nozzle has been developed by checking the air velocity at the nozzle outlet at the predetermined pressure. The testing set-up can also be used for the comparison of different types of nozzles, either main or sub-nozzles. It is observed that sub-nozzle with 19 holes gives less air velocity than that of one circular hole sub-nozzle. This is because of the possible contamination due to which the holes of used sub-nozzles get blocked and remain not so smooth, thus giving less air velocity, and hence the lower efficiency. Based on the above, continuous measuring of sub-nozzle efficiency has become a necessity. The design of the suggested apparatus is simple and reliable. <br/> <br/>Page(s): 358-360 Sun, 28 Nov 2010 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/10753 Title: Combined scouring-bleaching of cotton using potassium persulphate <br/> <br/>Authors: Wasif, A I; Indi, Y M <br/> <br/>Abstract: An attempt has been made to use hydrogen peroxide in a combined scouring and bleaching process on mill grey mercerized cotton fabric at a lower temperature in the presence of a bleach activator (potassium persulphate) and an ecofriendly commercial stabilizer. The results on assessment of various quality parameters such as whiteness and tensile strength of the bleached cotton fabric indicate no adverse effect of new process as compared to conventional combined scouring and bleaching process carried out at higher temperature. The new process is found to be successful in terms of savings in energy and time. <br/> <br/>Page(s): 353-357 Sun, 28 Nov 2010 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/10752 Title: Study on different reducing agents for effective vat dyeing on cotton fabric <br/> <br/>Authors: Santhi, P; Moses, J Jeyakodi <br/> <br/>Abstract: Effect of treatment with zinc (2.0% owm), ferrous sulphate (2.0% owm), zinc + hydrose (1.0% + 1.0% owm) and ferrous sulphate + hydrose (1.0% + 1.0% owm) reducing agents on dyeing properties of cotton fabric dyed with vat dye has been studied and the results are compared with those of the treatment with conventional hydrose (2.0% owm) in terms of reduction potential, depth of shade, and SEM analysis. The appreciable results are observed for the combination ferrous sulphate + hydrose as reducing agent, showing 99.17% colour strength with uniform dyeing and good reduction potential. <br/> <br/>Page(s): 349-352 Sun, 28 Nov 2010 22:58:59 GMT