Paper ID: JNSTTV3012401
The Cost-of-Living Index Comparison of Garment Workers between December 2018 and December 2023
Moinul Ahsan1*, Aminul Islam Mishuk1, Md. Shaddam Ibne Khan1
1 Department of Textile Engineering, University of South Asia, Dhaka-1348
*Corresponding Author’s E-mail: engr.mhsan@gmail.com
Abstract: An index of potential prices for living costs over a given period of time or geography is called the cost-of-living index. Bangladesh is a small nation that ranks among the top five in the world for total export value when it comes to the export of clothing. Despite being a small county, there are several reasons for this accomplishment, but one of the primary ones is the low cost of labor. In November 2023, the Bangladeshi government announced a minimum wage for garment laborers, which will go into effect in December 2023. However, the government’s previous announcement of approved wages was made in October 2018 and went into effect in November of the same year. The cost-of-living index for laborers from December 2018 to December 2023 will be compared in this study. It will provide light on the rationale behind the pay modification for garment workers. According to this report, the living expenses of garment workers have increased to between 51 and 55 percent, and the government of Bangladesh has proposed raising these workers’ pay by almost the same amount. Therefore, the government’s salary growth rate is supported by the study. There is usually a correlation between income and expenses. It is impossible to develop garment workers without a sufficient salary and living level. To guarantee that workers have a better quality of life, all garment owners should adhere to the proposed salary increase. It’s time for garment owners to pay attention to this issue as the cost of everyday necessities rises.
DOI: 10.5281/zenodo.12526178 View Full Text
Paper ID: JNSTTV3012402
Study on the Effect of Button Size, Button Stitch Type and Fabric GSM on Button Pull Strength Test
Md. Mazharul Islam1*, Md. Mahabub Alam1, Md. Rafiqul Islam1, Md. Saif Arman1
1 Department of Textile Engineering, Northern University Bangladesh
*Corresponding Author’s E-mail: mazh999@gmail.com
Abstract: Trimmings and accessories play a vital role in garment construction, with buttons standing out as one of the most crucial elements. Buttons come in various types, sizes, and materials, each offering distinct characteristics. The performance characteristics of buttons are typically evaluated through button pull strength tests, which measure their resistance to force. Thus, the primary aim of this research is to assess the factors influencing button pull strength. To achieve this objective, three different button sizes, two fabrics with varying GSM (grams per square meter), and three different stitch types have been selected for investigation. The breaking strength values of the different buttons have been measured to discern their performance under various conditions. The findings indicate a direct correlation between button pull strength and fabric GSM, button size, and the number of holes in the button. This study serves as a valuable resource for manufacturers, enabling them to select the most suitable button types based on the requirements of garment buyers.
DOI: 10.5281/zenodo.12627168 View Full Text
Paper ID: JNSTTV3012403
Study on the Effect of Number of Overlock Sewing Thread on Seam Strength
Md. Mazharul Islam1*, Abed Hasan1, Md. Rias Uddin Roky1, Md. Shifat1
1 Department of Textile Engineering, Northern University Bangladesh
*Corresponding Author’s E-mail: mazh999@gmail.com
Abstract: Seam strength is impacted by a multitude of factors, encompassing seam types, stitch types, stitch density, fabric types, and sewing thread count. Among these factors, stitch type holds significant importance. While numerous researchers have investigated different stitch types, there is a lack of research on the impact of overlock stitches with varying numbers of sewing threads on seam strength. Therefore, this study aims to examine the effect of the number of sewing threads in overlock stitches on seam strength. For this experiment, a 100% cotton fabric with a construction specification of (EPI: 88, PPI: 64, warp count: 20 Ne, and weft count: 20 Ne) was selected. Samples were prepared in accordance with the ASTM D434-95 method and sewn using various overlock stitches with different numbers of sewing threads. Seam strength testing was conducted using a seam strength tester, and the resulting seam strength reports were collected. The findings indicate that the four-thread overlock stitch exhibited the highest seam strength values for both warp and weft seams compared to other overlock stitches. So, this study can help manufacturers choose appropriate overlock stitches to maintain high-quality garment seams.
DOI: 10.5281/zenodo.12627316 View Full Text
Paper ID: JNSTTV3012404
An Empirical Analysis of the Impact of Industrial Enzyme Washing on Various Properties of Denim Fabric
Sraboni Ahmed1*, Esarat Ara Ema1, Nusrat Jahan1, Tahmina Akter1, Jannatul Ferdush1
1 Department of Textile Engineering, Northern University Bangladesh
*Corresponding Author’s E-mail: rain.ahmed17@gmail.com
Abstract: A large portion of the clothing industry is dedicated to garment washing, which is mostly used on denim clothing. The chemical or wet washing procedure and the mechanical or dry washing technique give denim a profitable and elegant appearance. Regarding various washing techniques, such as enzyme wash, enzyme stone wash, enzyme stone wash with bleaching, and heavy enzyme stone wash with bleaching, the properties of stretch denim fabric were investigated in this research. Tensile strength, tear strength, dimensional stability to washing, color fastness to light, color fastness to rubbing, and changes in fabric weight were among the numerous properties of stretch denim fabric investigated by different washing techniques. Although enzyme-washed cloth performed moderately in terms of several color fastness parameters, it performed better in terms of tear strength and tensile strength. Regarding the degree of color change and staining for color fastness to wash and color fastness to light, no appreciable variation was reported concerning various washing processes. Enzyme washing demonstrated superior color fastness against both dry and wet rubbing compared to other washing methods. In contrast to untreated stretch denim, after a variety of washing techniques, the GSM (gram per square meter) of the treated cloth increased accordingly.
DOI: 10.5281/zenodo.12526178 View Full Text
Paper ID: JNSTTV3012405
Characterization of Pineapple Leaf Fiber Spinning Performance through Cotton Spinning System
Md. Rashel Hawlader1, Md. Salim Ahmed1, Tanvir Mahmud1, Mohammad Mosharof Hossain1, Ms. Tasnia Akhter Tonu 1, G. M. Faysal1, Tanzeena Refat Tumpa2*
1 Department of Textile Engineering, Northern University Bangladesh, Dhaka-1230
2 Department of Textile Engineering, National Institute of Textile Engineering and Research
*Corresponding Author’s E-mail: trtumpa@niter.edu.bd
Abstract: The characterization of pineapple leaf fiber (PALF) spinning efficiency was investigated through the adaptation of cotton spinning techniques. PALF, renowned for its smooth texture and cellulose content, emerges as a promising natural option in fiber technology. The fibers underwent cutting into staple lengths, followed by analysis of their various properties. The data and results obtained from this analysis demonstrated the excellent spinnability of the fiber. The yarn produced solely from 100% PALF was subjected to evaluation and analysis of yarn count, tensile properties, evenness, and hairiness. Data obtained from the laboratory tests further indicated the considerable potential of PALF-derived yarn for use in apparel applications.
DOI: 10.5281/zenodo.12648189 View Full Text
Paper ID: JNSTTV3012406
Impact of Heat Setting on Cotton/Polyester Blended Ring Spun Yarn with Varying Blend Ratio
Tanvir Mahmud1, Md. Salim Ahmed1, Md. Rasel Hawlader1, G.M. Faysal1, Md. Khorshed Alam1 , Md. Sanaullah Murad1*, Md. Lutfor Rahman2
1 Department of Textile Engineering, Northern University Bangladesh , Dhaka-1230
2 Department of Textiles, Textile Vocational Institute, Bangladesh.
*Corresponding Author’s E-mail: textilemurad@gmail.com
Abstract: Heat setting is the process of applying heat to fibers to provide elasticity, crease resistance, resilience and shape retention. The present study reveals the effect of heat setting conditions on the properties of cotton/polyester blended yarns of linear density 22 Ne with two different blend ratios of 80:20 and 60:40, respectively. Both of the blended yarns were subjected to heat setting at certain temperatures and pressures. The yarn properties like U%, CV%, Neps (200%), IPI/km, and CSP were measured before and after the heat set. The test result showed, in terms of yarn regularity such as U%, CVm%, and hairiness, a decrease in the amount of cotton in CVC blend yarn has a substantial impact on the yarn quality after heat setting. Additionally, after heat setting, the CSP for 60:40 CVC yarn decreased slightly while the CSP for 80:20 CVC yarn increased. As a result, heat-setting was found to be effective for the various quality parameters of blended yarn.
DOI: 10.5281/zenodo.12648991 View Full Text
Paper ID: JNSTTV3012407
Scope of decreasing dyeing temperature by changing the amount of auxiliaries in reactive dyeing on cotton
Md. Rakibul Hasan1, Md. Imran Hosen1, Md. Ariful Islam1, Md. Moshiur Rahman Monna2, Selim Reza3, Md. Zihadul Islam4, Abdullah Al Fariz1 and Md. Himel Mahmud1
1 Department of Textile Engineering, Northern University Bangladesh, Dhaka, Bangladesh
2 Kung Keng Textile (BD) Ltd., Savar, Bangladesh.
3Dhaka University of Engineering & Technology, Gazipur, Bangladesh
4Silver Composite Textile Ltd., Tangail, Bangladesh
*Corresponding Author’s E-mail: mhimelmahmud@gmail.com
Abstract: This paper addresses the pressing need to optimize energy utilization in textile dyeing processes, particularly focusing on reactive dyeing, amidst global energy crises exacerbated by recent events. While reactive dyes offer versatility and efficiency, their application necessitates substantial energy consumption. To mitigate this, the study explores an innovative approach of augmenting standard dyeing recipes with increased quantities of salt and soda, enabling successful dyeing at a reduced temperature of 40 °C, a significant deviation from the standard 60 °C, while maintaining comparable results. This strategy demonstrates potential energy savings compared to conventional practices. Furthermore, it suggests avenues for further research, such as exploring alternative auxiliaries or methodologies to further reduce dyeing temperatures, thus paving the way for sustainable practices in textile production.
DOI: 10.5281/zenodo.12649736 View Full Text
Paper ID: JNSTTV3012408
Studies on Preparation, Modification and Characterization of Natural Fibers (Jute, Agavae, Pulque, Okra) as composite reinforced material
Md. Mohsin Uddin Azad1*, Md. Islamul Haque1
1Department of Textile Engineering, Northern University Bangladesh
*Corresponding Author’s E-mail: mhsn.aazad@gmail.com
Abstract: Plant fibers are rich in cellulose, and they are a cheap, easily renewable source of fibers with the potential for polymer reinforcement. The presence of surface impurities and the large number of hydroxyl groups make plant fibers less attractive for reinforcing polymeric materials. The main focus of this approach is the improvement of the physical and mechanical properties of natural fibers through chemical treatments. Hence, examine the possibility of an alternative replacement for man-made fibers. The surface morphology study was carried out under SEM [1]. The tensile and flexural properties were determined using the electronic tensometer, and the results were compared by plotting the graphs between stress and strain for tensile properties and load elongation for flexural properties.
DOI: 10.5281/zenodo.12650367 View Full Text
Paper ID: JNSTTV3012409
Impact of method study on the volume of garment production
Md. Ariful Islam1, Mahedi Hasan2, Tanjuil Hoque Tanvi3, Md. Sofeul Alam4, Md. Rakibul Hasan1, Abdullah Al Fariz1, Md. Himel Mahmud1*
1 Northern University Bangladesh
2DBL Group
3Hohenstein Institute Bangladesh
4SGwicus BD Ltd
*Corresponding Author’s E-mail: mhimelmahmud@gmail.com
Abstract: Method study, one of the two fundamental components of work study, is the most efficient approach to increasing production while using the same number of workers and machinery without making any additional investments. In essence, it is employed to discover more effective working methods. The goal of the study is to implement an improved way to eliminate bottlenecks and, hence, boost sewing line production. The operations on the t-shirt sewing line are severely examined in this study, and the outcome of a method study that was used on the hem operation is studied. During the formation of blind hem stitches, due to the curl characteristics of the fabrics, workers needed more time to input the fabric uniformly. So, an overlock machine is used to remove the curl edge. As a result, bottom blind hem stitching is done frequently without any interruption. Following that, assembly line balancing is conducted considering the added operation, which is obtained from the method study and current operation times. The study reflects that the final output of the bottom blind hem operation is increased to 207 pieces’ from 111 pieces. The findings of this project might be helpful for garment sewing lines as well as for increasing production.
DOI:10.5281/zenodo.12651136 View Full Text
Paper ID: JNSTTV3012410
Investigation on the Reuse of Dyeing Process Effluent in Polyester Yarn Dyeing
Tasnia Akhter Tonu1*, Imam Hossain2, Md. Rashel Hawlader1, Md. Nazmul Islam1
1 Department of Textile Engineering, Northern University Bangladesh, Dhaka-1230, Bangladesh
2 Department of Textile Engineering, Dhaka University of Engineering and Technology, Gazipur-1707, Bangladesh
*Corresponding Author’s E-mail: tasniaakhter23@gmail.com
Abstract: There are serious environmental problems when certain enterprises release their effluent under inappropriate and unmanaged settings. As a result, the textile sector has made water reuse a key goal for cutting costs and preventing environmental damage. This project’s goal is to determine whether it is feasible to dye 100% spun polyester yarn using the dyeing process with waste water again. This study, which evaluates quality characteristics such as wash fastness, rubbing fastness, spectrophotometric evaluation (DE value), and shade differences across dyed samples, was carried out at Purbani Fabrics Ltd. in Bangladesh. The results show that sample 3, which was dyed with wastewater containing 60% color, produced good results. This strategy not only lessens the impact on the environment but also saves money by using less water and chemicals. Also, a light shade was achieved without using dyestuff for sample 2. The study’s overall findings demonstrate the textile industry’s potential for environmentally friendly and sustainable dying techniques.
DOI:10.5281/zenodo.12651829 View Full Text
Paper ID: JNSTTV3012411
A Study on Room Design and Radiation Safety Around Room for Cobalt‑60 Teletherapy Unit at SSDL, Bangladesh Atomic Energy Commission
Md. Abdul Aziz1, 2, 3*, AKM Moinul Haque Meaze1, Md. Shakilur Rahman2, Santunu Purohit1,4, Tanjim Siddiqua2, Hossen Mohammad Jamil2
1Department of Physics, University of Chittagong, Chattogram- 4331, Bangladesh
2Secondary Standard Dosimetry Laboratory, Institute of Nuclear Science & Technology, Bangladesh Atomic Energy Commission, Savar- 1100, Bangladesh
3Department of Textile Engineering, Northern University Bangladesh, Dhaka-1230, Bangladesh
4School of Physics, Huazhong University of Science and Technology, Wuhan, China
*Corresponding Author’s E-mail: azizphysics15@gmail.com
Abstract: Cancer is one of the recognized negative consequences of ionizing radiation. It is well-known to be the main cause of mortality and a major public health issue. Methods for resolving this public health issue have been identified via study. According to several studies, 60 percent of patients need radiation, which is a primary modality of cancer treatment with either a palliative or curative purpose. Teletherapy is a type of treatment that delivers radiation to cancer cells from a specific distance. The focus of this study is exclusively on cobalt-60 teletherapy, which has recently been installed at the Secondary Standard Dosimetry Laboratory (SSDL) of the Bangladesh Atomic Energy Commission to provide quality assurance and quality control services for all radiotherapy machines in Bangladesh. The aim of this work is to investigate the existing shield design aspects of the Cobalt-60 teletherapy unit, whether it is safe for the operating personnel as well as for the public present outside the facility. The results show that the maximum radiation stays less than 1 µSv/h around the radiation facility room during exposure, which remains within the tolerance limit. A maze inside the radiation room added extra shielding for the outsiders during the exposure.
DOI: 10.5281/zenodo.12652560 View Full Text
Paper ID: JNSTTV3012412
Applications of Natural Dye Extracted from Malabar spinach and Red spinach as Photosensitizers in Dye-Sensitized Solar Cell
Mishion Dev1,2,3*, Md. Ashraful Alam1, Md. Mosharraf Hossain Bhuiyan2, Md. Mohsin Uddin Azad3, Towhidul Islam3, Zahin Mostakim3
1Department of Applied Chemistry and Chemical Engineering, Noakhali Science and Technology University, Noakhali-3814, Bangladesh
2Institute of Radiation and Polymer Technology, Atomic Energy Research Establishment, Bangladesh Atomic Energy Commission, Dhaka -1349, Bangladesh
3Department of Textile Engineering, Northern University Bangladesh, Dhaka-1230, Bangladesh
*Corresponding Author’s E-mail: mishion.nstu.acce@gmail.com
Abstract: Dye-sensitized solar cells (DSSCs) have emerged as an innovative solar energy conversion technology that offers a new path for sustainable power generation. Typical DSSC consists of a sensitizing dye chemically bound to a nanocrystalline semiconductor oxide. In this study, two natural dyes were extracted from Malabar spinach and red spinach respectively, and used as photosensitizers to construct the DSSCs. The candle nip carbon coating technique was employed to prepare the counter electrodes, and a redox liquid iodine (I–/I3-) was used as an electrolyte. UV-vis spectroscopy was utilized to investigate the absorption range of the extracted dyes, while FT-IR was utilized to analyze the functional groups present. The photovoltaic properties of the cells, as well as their efficiency, were evaluated using current-voltage (I-V) curves. The extracted dyes showed significant optical absorption in ultraviolet and visible regions. The FT-IR spectra confirmed the presence of anchoring groups in the dye solutions. DSSC based on Malabar spinach dye has shown an open-circuit voltage (Voc) of 0.64 V, a short-circuit current (Isc) of 0.49 mA, a fill factor (FF) of 0.52, and a photoelectric conversion efficiency of 0.16%. In contrast, DSSC based on red spinach extract shows a photoelectric conversion efficiency of 0.14% with an open circuit voltage (Voc) of 0.61 V, a short circuit current (Isc) of 0.41 mA, and a fill factor (FF) of 0.43.