Influence of winding parameters on yarn content and package geometry of wound packages

492-496This study is aimed at evaluating the step-precision assembly winding in terms of its potential to accommodate maximum yarn content on a given size of tube. The influence of various parameters related to step-precision winding on yarn content and package geometry of a close step-precision wound package has been studied. The outcome of this study is presumed to be very useful to manufacturers of winding as well as buyers of assembly winding systems. Step-precision winding parameters, like coil angle at start, angle up to which it is allowed to change and the number of diamonds along the circumference (Y value), influence yarn content on package; lower values of start angle and Y but higher value of change angle give increased yarn content. At the same time, it is also observed that the package with lower start angle and higher change angle give greater projection of package side flanks

Kinetics of oxidation of hydrazinium ion by peroxomonosulphate in perchloric acid solution

251-253The kinetics of oxidation of hydrazine perchlorate by peroxomonosulphate is in agreement with the rate law The values of k1 and K, where k1 and K are rate and equilibrium constants respectively, have been determined to be 2.8 x 10-4 S-1 and 3.4 x 102 dm3 mol-1 at 30° and I = 1.0 mol dm-3