Traditional ring spinning system is associated with the several limitations, one of which is yarn hairiness. The awareness has been vibrantly growing among the spinning mills for reducing staple yarn hairiness because of its detrimental effects on the subsequent processes (i.e., weaving, knitting, dyeing etc.) and the quality of resultant textile products. As a result, modified form of ring frame has attracted a lot of attention among the researchers for making yarn with the lower level of hairiness value. Besides the raw material parameters and some processing variables, spinning triangle (ST) is the most critical region that has decisive influence on the distribution of fiber tensions and their spatial orientations and shapes in staple yarn body. Thus, using appropriate methods to control the spinning triangle geometry actively has been a vital issue in the field of yarn hairiness reduction. In this paper, it is attempted to make an overview on the spinning triangle based modifications of ring frame that have been designed and destined to reduce hairiness. However, agent aided ring spinning system has also been briefly discussed in this paper as well.
The physical and dimensional characteristics, i.e. course and wale spacing, stitch density, tightness factor, diameter, porosity, dimensional stability and bursting strength of single jersey knitted items containing lycra yarn with the variations in stitch length and lycra content have been examined and a detail investigation on the lycra filament has been discussed in this study. Six different samples were knitted with identical cotton and lycra yarn but different in lycra contents and stitch length. After conditioning in a controlled environment, all the samples were tested as per the established methods. After analyzing the test results, noticeable effects of variations in stitch length and lycra content on physical and dimensional characteristics of single jersey knitted fabric has been found. As smaller the stitch length and as greater the lycra content, the dimensional stability and bursting strength are better; on the other hand, the air permeability is lower.
Injury and accidents have a lot of negative impacts in an organization, especially in a manufacturing industry. Injury is a hindrance to productivity as it harms the lead time of the production. Additionally, reputation and development of an industry get destroyed as it directly related to manpower and product or service. Previously in garments industry of Bangladesh, a lot of injury happened almost every year due to infrastructural problem as well as various hazards in the production floor. The number of these accidents has been reduced to a great extent at present. The injury must be minimized to provide safe working environment, to ensure compliance issues and to retain the orders in Readymade Garments (RMG) industry. In our paper, it was attempted to minimize the injury in some selective sections of a garments industry. The total number of injuries occurred in those sections for a specific month was collected. After analyzing the collected data, the major causes of accidents and injuries faced by the workers in those sections were pointed out. The possible causes were then solved by taking proper actions and the data against same criteria was analyzed for the consecutive month. Finally, after achieving positive results, related preventive recommendations were framed out and given to the industry for injury minimization in future.
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