http://ir.bdu.edu.et/handle/123456789/2138 2001-01-13T06:32:09Z http://ir.bdu.edu.et/handle/123456789/9427 EFFECT OF POTATO AND CORN STARCH ON PLAIN WOVEN FABRIC PRODUCTIVITY IN KTSC Weaving efficiency is greatly affected by the warp yarns strength and other properties. To improve these warp yarn properties, sizing is done with various agents either natural or synthetic sizing materials. Most of the natural sizing agents used in the industry is made of starch. Starch used is obtained from different sources with different properties. For this reason, there is the need to compare different sources of starch with and without PVA for their competitiveness. In this study two starches: potato and corn have been comparatively studied for their performance on sized yarn. Ring spun cotton yarn of 34 Nm was sized using the starches and its properties studied. The properties of the constructed fabric in terms of tensile strength, elongation, abrasion resistance and size removal percentage after desizing were also studied. End breakage rate on the loom was observed to check the weaving efficiency. From the results it was seen that the tensile strength, strength gain and abrasion resistance of yarns sized with potato starches without PVA was higher. Size removal percentage of yarns sized with potato starches with PVA was higher. Corn starch without PVA showed better result on elongation at break. Corn starch with PVA sized yarns performance was lower on overall properties and end breakage rate on loom. Yarns sized with Potato starch without PVA showed better overall performance properties and it is cost effective while corn starch showed lower performance properties and it is not cost effective 2019-03-29T00:00:00Z http://ir.bdu.edu.et/handle/123456789/9426 THE CONTRIBUTION OF SMALL BUSINESS SECTOR IN IMPROVING THE LIVING STANDARD OF ENTREPRENEURS IN WOLDIA CITY PARTICULARLY WOMEN Women Entrepreneurship plays a prime role to develop the country economy rather than in improving the living. Women are generally perceived as home makers with improving the living standard of their family. This study was designed to show the contribution of small business sector in improving the living standard of women entrepreneurs in woldia city. It also addressed the factor and challenges of women entrepreneurs in to improvement their living standard. A sample of 96 women entrepreneurs engaged from five sectors was taken for the study using probable sampling of Slovin’s. The study also found that conflicting gender roles, social acceptability and network with outsiders were the major social factors that affect these entrepreneurs. In an attempt to providing answering to the basic research questions, a questionnaire that include all the necessary thing like profiles, challenge, factors and changes of women entrepreneurs. After the data has been collected, it was analyzed using statistical techniques and descriptive statistics. The results of the study indicate the personal characteristics of women entrepreneurs in Woldia and improvement of their performance. It also shows that lack of inputs, challenge of the process and the final improvement of women entrepreneurs output. Finally sums up all the points that are raised on the study, draw conclusion and render good recommendation on women entrepreneurs in woldia city. 2019-03-29T00:00:00Z http://ir.bdu.edu.et/handle/123456789/9425 MECHANICAL PROPERTIES OF DIFFERENT WOVEN FABRIC STRUCTURE ON WORK UNIFORM The main focus of the study is mechanical properties of cotton woven fabrics different fabric structures for similar raw materials and machines the researchers to produced four sample fabrics in KTSC with plain, 2/2 twill, 3/1 twill and 3-end satin weave structure using for similar 27 Ne warp and 20 Ne weft counts. Due to this research work effect of weave structures on various mechanical properties of cotton woven fabrics was studied. One of the most important characteristics of woven fabric is strength. Strength is also measured in tensile, tearing or elongation. The findings of this study 3/1 twill, 2/2 twill and plain weave have high breaking strength than satin weave. Because the three and two warp yarns share all the force applied during this time the maximum force required to break the three and two yarns at the same time need maximum force. In the case of plan weave higher interlacement causes higher crimp and elongation due to this reason plain weave high breaking strength than satin weaves. And too much larger floats also cause lower breaking strength due to looser structure. Long yarn floats and a low number of interlacing cause the continuous contact area of one yarn strand to expand and this facilitates the yarn to lose its form more easily by providing easier movement as a result of the rubbing motion. So long floats in a weave such as satin structures are more exposed abrade and pilling faster. But the fabrics that have lower floats such as flat plain and 2/2 twill weave fabrics have better abrasion and pilling resistance than satin and 3/1 twill weaves. a group of yarn float on the fabric would share the applied force in the satin weave increase the tear resistance where as in the plain fabric a single yarn would load 64N force due to this reason it was easily tear than the other woven fabric based on this experiment the result shows twill weaves are the better strength, moderate pilling and plain weave better abrasion resistance 2019-03-29T00:00:00Z http://ir.bdu.edu.et/handle/123456789/9424 COMPARATIVE STUDY ON THE EFFECT OF ELASTANE YARN ON WEFT KNITTED FABRIC PROPERTIES The purpose of this study was to investigate the comparative effect of elastane yarn on some mechanical and comfort properties of single jersey, 1x1rib and interlock knitted fabrics in relation to elastane yarn presence in the combed ring cotton yarn. An elastane yarn accounts for about 5% content (40denier = 133Ne) while cotton accounts for 95% content (35 Ne) in the 28Ne combed cotton/elastane blended yarn (cotton/elastane = 95/5%) and the elastane is not skin friendly (naked filament) with the cotton yarn. The comparison was done between cotton/elastane yarn knitted fabrics and 100% cotton yarn knitted fabrics and within the three structures such as single jersey, 1x1 rib and interlock. The test was done for the bursting strength, abrasion, pilling resistances and air permeability of single jersey, 1x1rib and interlock knitted fabrics using digital bursting strength tester and Martindale abrasion and pilling tester and air permeability tester by conditioning for 24hours at 21oc±1 and 65±2% RH. As found from the study, the presence of elastane yarn influences significantly by decreasing the bursting strength and increasing abrasion resistance of the three knitted fabrics. The pilling resistance of knitted fabrics such as 1x1rib and interlock decreased while single jersey knitted fabrics increased significantly due to 5%elastane yarn in 95% combed cotton yarn. Together with the air permeability; the loop length, wales per centimeter, thickness, shrinkage percent and tightness factor are also investigated since they are deciding factors of air transmission of knitted fabrics. It was found out that the air permeability property of single jersey, 1x1rib and interlock knitted fabrics made from 100%cotton and cotton/elastane yarns is significantly different from each other and all of the knitted fabrics have lower air permeability with cotton/elastane blend yarns as compared to 100%cotton yarn. 2019-03-29T00:00:00Z