http://nopr.niscair.res.in/handle/123456789/289 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/419 Title: Antimicrobial treatments for textiles <br/> <br/>Authors: Gupta, Deepti <br/> <br/>Abstract: This review presents a critical analysis of the various aspects of producing antimicrobial textiles. The microbes involved, their mechanism of adherence on natural and synthetic fibres, effect of microbial growth on textiles, principle and mechanism of antimicrobial activity and the compounds being used for this purpose have been covered <br/> <br/>Page(s): 254-263 http://nopr.niscair.res.in/handle/123456789/418 Title: Dynamics analysis and testing in air-jet weft insertion <br/> <br/>Authors: Shen, Danfeng; Ye, Guoming <br/> <br/>Abstract: On the basis of fluid dynamics, this paper deduces the pull force formula of main nozzle on air-jet loom and introduces a method of experiment to test the airflow velocity in the exit of nozzle. The effect of different structure parameters of main nozzle on the pull force has been studied. It is observed that the inlet of thread tube is a bottleneck of main nozzle and the main development of main nozzle lengthens the thread tube. The theoretical findings are found to be in good agreement with experimental findings and this verifies that the formula for pull force is reasonable <br/> <br/>Page(s): 189-195 http://nopr.niscair.res.in/handle/123456789/417 Title: Optimizing the frequency of oscillating beater in double roller gin <br/> <br/>Authors: Jadhav, S B; Paralikar, K M <br/> <br/>Abstract: Variable speed double roller gin has been used to optimize the frequency of oscillating beater, considering three levels of oscillating frequency, namely 750, 1000 and 1250 cpm and conventional frequency of 1000 cpm. The factors considered for optimum rates include lint turn out, fibre quality and ginning rate. Overall, the fibre quality remains unaffected for all types of cottons, whereas the lint out-turn and ginning rate are found to be highest at 1250cpm frequency for long and extra long staple cottons. The conventional frequency is found to be better for short staple cottons. The short fibre content, seed coat neps and neps in the lint are comparatively less at higher frequency. <br/> <br/>Page(s): 184-188 http://nopr.niscair.res.in/handle/123456789/414 Title: Fibre migration in compact spun yarns: Part II – Mechanical compact yarn <br/> <br/>Authors: Ganesan, S; Venkatachalam, A; Subramaniam, V <br/> <br/>Abstract: Fibre migration of ring and mechanical compact spun combed cotton yarns (40s Ne) has been studied using the tracer fibre technique. It is observed that the migration parameters for compact yarn made from Mechanical Compacting System (MCS)–positive nip are 10-15 % lower than that of the ring yarn and similar to that of pneumatic compact yarn of the same count. However, only a marginal reduction (2-6%) is observed in migration parameter for compact yarn made from MCS–semi-positive nip as compared to ring yarn and it is not significant. Significantly lower degree of migration is observed in mechanical compact yarn spun from MCS–positive nip than in ring yarn due to the significant reduction in size of the spinning triangle in the system and its consequence in the tension gradient. In the case of MCS–semi-positive nip, the base of the spinning triangle remaining the same, its altitude increase causes slight reduction in tension gradient, resulting in marginal change in migration parameters. Yarn diameter of mechanical compact yarn from MCS–positive nip system is found to be significantly lower than that of ring yarn and similar to pneumatic compact yarn, which contributes to increase in strength by 10-15%. The yarn from MCS–semi-positive nip system has shown a marginal reduction in yarn diameter and hence the increase in strength is marginal (3-5%). <br/> <br/>Page(s): 163-168