Million Ayele - Academia.edu (original) (raw)
Papers by Million Ayele
Effect of Weft Yarn Type and Weaving Parameters on Surface Roughness and Drapeability of Woven Fabric
Journal of natural fibers, Mar 30, 2024
Determination of Factors Affecting the Quality of Sized Cotton Yarn Using Screening Experimental Method
Journal of natural fibers, Feb 12, 2024
Prediction of the Impact of Ring Spinning Machine Front Roller Rubber Cot Shore Hardness on Spun Yarn Quality Parameters
Enhancing Textile Cotton Yarn Sizing: Investigating Factors Impacting Breaking Strength, Pick-Up Percentage, and Elongation Loss
Journal of natural fibers, May 26, 2024
Impact of Weft Yarn Structure and Fiber Type on Weft Yarn Velocity and Twist Loss in Air-Jet Weaving: A Critical Review
Journal of natural fibers, Jun 15, 2024
Air-jet weaving is an innovative weaving technique that uses friction between the yarn surface an... more Air-jet weaving is an innovative weaving technique that uses friction between the yarn surface and air stream to propel the weft yarn. The interaction between the yarn surface and air is complex and affects weft yarn motion. Understanding the factors influencing this interaction is crucial for optimizing the weft yarn speed and twist loss in air jet weaving. This critical evaluation examined the impact of weft yarn structures such as yarn count, twist, hairiness, volume, and fiber types such as cotton and polyester on weft yarn speed and twist loss. The findings revealed that both the yarn structure and fiber type significantly impact the twist loss and insertion time during air jet weft insertion. Factors such as hairiness, volume, linear density, fiber type, and twist level were found to significantly affect the twist loss and weft yarn velocity. High hairiness and thin yarns exhibited higher velocity but greater twist losses, whereas highly twisted yarns demonestrated lower velocity and higher twist loss. Additionally, polyester yarns showed a lower velocity and experienced more twist loss than cotton yarns. These insights can assist textile manufacturers in optimizing the air-jet weaving parameters to improve weft yarn insertion and overall fabric quality.
Technology of Fabric Manufacture (Traditional Cotton Woven Fabric Manufacturing in Ethiopia)
Textile science and clothing technology, 2024
Analyzing the Effect of Various Sizing Machine Settings on Abrasion Resistance and Size Pick-Up of Polyester/Cotton Blend Sized Yarn Using Box-Behnken Design
Journal of Natural Fibers, Feb 5, 2023
Sustainability, May 25, 2022
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Multiple response optimization of sizing machine settings and sized yarn tensile properties using advanced method of experimental design
Journal of Engineered Fibers and Fabrics, 2023
On a loom, the warp yarns experience exceptionally high mechanical stresses and strains, as well ... more On a loom, the warp yarns experience exceptionally high mechanical stresses and strains, as well as significant abrasion from friction. As a result, significant yarn breakages cause loom stoppages and, hence, production and quality interruptions. To mitigate this problem, the warp yarns should be treated with a thin, strong film of an appropriate adhesive. The aim of this study is therefore, to investigate the effect of sizing machine parameters on tensile properties of the yarn and to optimize the sized yarn tensile properties. Design expert 11 software with Box-Behnken design has been employed to design the research, analyze the results of experiments, and optimize the responses. In this research, three factors, each at three levels (wet zone yarn tension (A) (340, 380, and 420 N), squeezing roller pressure (B) (13, 15, and 17 N), and sizing machine speed (C) (30, 49, and 68 m/min), as well as three response variables (gain strength, loss elongation, and stretch), are considered. 15 samples of sized yarn have been produced with various combinations of the given factors, and the values of the response variables are measured for each sample. It has been observed that wet zone yarn tension and squeezing roller pressure have a significant effect on gain strength, stretch, and loss elongation. According to the regression analysis, gain strength has a negative relationship with wet zone yarn tension and a positive relationship with squeezing roller pressure. In the other case, both wet-zone yarn tension and squeezing roller pressure have a positive and significant effect on loss elongation and yarn stretch. At 340 N wet zone yarn tension, 13 N squeezing roller pressure, and 51 m/min sizing machine speed, the optimum values of gain strength (32.7 cN/tex), loss elongation (18.5%), and stretch (1.4%) were obtained. The methodologies employed in this study revealed the empirical relationship between the factors and the responses, the interaction effects of the factors on the responses, and multiple response optimizations. The optimized result of this study can be applied to the warp yarn sizing and can improve the tensile properties of the yarn and the loom’s efficiency significantly.
Multiple response optimization of sizing machine settings and sized yarn tensile properties using advanced method of experimental design
Journal of Engineered Fibers and Fabrics
On a loom, the warp yarns experience exceptionally high mechanical stresses and strains, as well ... more On a loom, the warp yarns experience exceptionally high mechanical stresses and strains, as well as significant abrasion from friction. As a result, significant yarn breakages cause loom stoppages and, hence, production and quality interruptions. To mitigate this problem, the warp yarns should be treated with a thin, strong film of an appropriate adhesive. The aim of this study is therefore, to investigate the effect of sizing machine parameters on tensile properties of the yarn and to optimize the sized yarn tensile properties. Design expert 11 software with Box-Behnken design has been employed to design the research, analyze the results of experiments, and optimize the responses. In this research, three factors, each at three levels (wet zone yarn tension (A) (340, 380, and 420 N), squeezing roller pressure (B) (13, 15, and 17 N), and sizing machine speed (C) (30, 49, and 68 m/min), as well as three response variables (gain strength, loss elongation, and stretch), are considered. ...
Analyzing the Effect of Various Sizing Machine Settings on Abrasion Resistance and Size Pick-Up of Polyester/Cotton Blend Sized Yarn Using Box-Behnken Design
Journal of Natural Fibers
Effect of Cotton/Polyester Blend Ratio, Loom Speed, and Air Pressure on Yarn Twist Loss and Yarn Strength Loss: The Case of Air-Jet Loom
Journal of Natural Fibers
Advances in Materials Science and Engineering
Cattle hoofs are abundantly available by-product sources of organic material from the slaughterho... more Cattle hoofs are abundantly available by-product sources of organic material from the slaughterhouse. It can be successfully converted into keratin protein. Keratin extracted using alkali hydrolysis has a better conservancy of keratin structure. The purpose of this study is optimizing the extraction of keratin from cuttle hoof. Designing of the experiment, analysis of the results, and optimization of the process parameters have been conducted by central composite design (CCD). Three factors (temperature (A), time (B), and concentration of NaOH (C)) each at five levels have been used to extract the keratin protein from cattle hoof and two response variables (dissolution % and purity %) have been considered in the study. The results obtained demonstrate that extraction temperature, alkali concentration, and time showed a significant effect on the purity and dissolution of keratin. The regression model shows that all factors have positive and significant relation with dissolution perce...
Optimization of air pressure and speed of air jet loom; impact on fabric tensile and tear strength properties using Response Surface Methodology
Journal of Natural Fibers, 2022
Effect of yarn twist on tensile strength, abrasion and pilling resistance of plain-woven cotton fabric
Indian Journal of Fibre & Textile Research (IJFTR), Sep 21, 2021
Sustainability
The meat processing industry produces a huge quantity of by-products, approximately 150 million t... more The meat processing industry produces a huge quantity of by-products, approximately 150 million tonnes per year. The live weight of the animals is distinguished as edible, inedible, and discardable by-products, with the discardable parts equating to 66%, 52%, and 80% of the overall live weight of cattle, lamb, and pigs, respectively. Only a small percentage of those by-products are nowadays exploited for the production of high added value products such as animal feed, glue, fertilizers, etc., whereas the main management method is direct disposal to landfills. As such, the current disposal methodologies of these by-products are problematic, contributing to environmental contamination, soil degradation, air pollution, and possible health problems. Nevertheless, these by-products are rich in collagen, keratin, and minerals, being thus promising sources of high-value materials such as bioenergy, biochemical and other biomaterials that could be exploited in various industrial application...
A techno-economic feasibility of a process for extraction of starch from waste avocado seeds
Clean Technologies and Environmental Policy, 2020
Abstract Generation of waste from the agro-processing industry is continually increasing due to i... more Abstract Generation of waste from the agro-processing industry is continually increasing due to increasing needs for food security. Beneficiation of this waste has both economic and environmental impacts that can be overcome via implementation of cleaner production technologies. Starch is a renewable biopolymer material which is completely biodegradable, easy to handle and widely available in nature. It has wide applications in various industries including food processing, pharmaceutical, confection, beverage, pulp and paper, chemical, cosmetic, binder and adhesive, packaging and printing, fermentation and textile industries. We have previously demonstrated that high-quality industrial-grade starch can be extracted from waste avocado seeds. This report is focussed on a techno-economic evaluation of the extraction process. It can be concluded, from the study that extraction of starch from waste avocado seeds is economically feasible with an accounting rate of return of 75% and a break-even analysis of 82% with a payback period of 2 years. The process is environmentally sustainable in that minimal amounts of chemicals are used in the extraction process and the wastes generated can be beneficiated into high-value products that can add further to the profitability of the venture. Graphic abstract
TEKSTILEC, 2022
Yarn tensile properties, unevenness, and irregularities are the most important properties of the ... more Yarn tensile properties, unevenness, and irregularities are the most important properties of the yarn quality parameters that determine the fabric’s mechanical properties and appearance. In the current study, the combined effect of carding machine parameters (cylinder speed, flat speed, cylinder to flat setting, and taker-in speed) on yarn properties (yarn strength, elongation, unevenness, and total yarn imperfection) have been examined. In this research, 40 samples of open-end yarn were produced and each of them was tested for their strength, elongation, unevenness, and imperfection. Design-expert 7.0.0 software and Factorial designing have been employed to analyze the results. The results from statistical analysis have showed that increasing the gap between the cylinder and flat setting and increasing the taker-in speed increased yarn unevenness and increasing cylinder speed, flat speed, and taker-in speed increased total yarn imperfection significantly. Similarly, increasing the ...
Beneficiation of avocado processing industry by-product: A review on future prospect
Current Research in Green and Sustainable Chemistry, 2022
Journal of Engineering, 2021
This paper aims at the extraction and application of eco- and user-friendly natural gum obtained ... more This paper aims at the extraction and application of eco- and user-friendly natural gum obtained from Commiphora Africana tree. The result obtained is also compared with fabric treated with a commercial softener of the same concentration. The gum was extracted by puncturing the stem of the plant and the extracted gum was applied directly to 100% cotton fabric through a padding process with different concentrations of extracted gum (i.e., 20 gram per litre (g/l), 25 g/l, and 30 g/l). Another similar fabric sample was treated with a silicon softener of the same concentration. The fabric samples treated with both natural gum and silicon softener were tested for their stiffness, crease recovery, and drapability. The results show that the change in fabric softness depends on the concentration of softener used in both cases. As the concentration of the softener increased, there was a decrease in bending length and drape coefficient for both fabric samples. The drape coefficient of fabric ...
Effect of Weft Yarn Type and Weaving Parameters on Surface Roughness and Drapeability of Woven Fabric
Journal of natural fibers, Mar 30, 2024
Determination of Factors Affecting the Quality of Sized Cotton Yarn Using Screening Experimental Method
Journal of natural fibers, Feb 12, 2024
Prediction of the Impact of Ring Spinning Machine Front Roller Rubber Cot Shore Hardness on Spun Yarn Quality Parameters
Enhancing Textile Cotton Yarn Sizing: Investigating Factors Impacting Breaking Strength, Pick-Up Percentage, and Elongation Loss
Journal of natural fibers, May 26, 2024
Impact of Weft Yarn Structure and Fiber Type on Weft Yarn Velocity and Twist Loss in Air-Jet Weaving: A Critical Review
Journal of natural fibers, Jun 15, 2024
Air-jet weaving is an innovative weaving technique that uses friction between the yarn surface an... more Air-jet weaving is an innovative weaving technique that uses friction between the yarn surface and air stream to propel the weft yarn. The interaction between the yarn surface and air is complex and affects weft yarn motion. Understanding the factors influencing this interaction is crucial for optimizing the weft yarn speed and twist loss in air jet weaving. This critical evaluation examined the impact of weft yarn structures such as yarn count, twist, hairiness, volume, and fiber types such as cotton and polyester on weft yarn speed and twist loss. The findings revealed that both the yarn structure and fiber type significantly impact the twist loss and insertion time during air jet weft insertion. Factors such as hairiness, volume, linear density, fiber type, and twist level were found to significantly affect the twist loss and weft yarn velocity. High hairiness and thin yarns exhibited higher velocity but greater twist losses, whereas highly twisted yarns demonestrated lower velocity and higher twist loss. Additionally, polyester yarns showed a lower velocity and experienced more twist loss than cotton yarns. These insights can assist textile manufacturers in optimizing the air-jet weaving parameters to improve weft yarn insertion and overall fabric quality.
Technology of Fabric Manufacture (Traditional Cotton Woven Fabric Manufacturing in Ethiopia)
Textile science and clothing technology, 2024
Analyzing the Effect of Various Sizing Machine Settings on Abrasion Resistance and Size Pick-Up of Polyester/Cotton Blend Sized Yarn Using Box-Behnken Design
Journal of Natural Fibers, Feb 5, 2023
Sustainability, May 25, 2022
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Multiple response optimization of sizing machine settings and sized yarn tensile properties using advanced method of experimental design
Journal of Engineered Fibers and Fabrics, 2023
On a loom, the warp yarns experience exceptionally high mechanical stresses and strains, as well ... more On a loom, the warp yarns experience exceptionally high mechanical stresses and strains, as well as significant abrasion from friction. As a result, significant yarn breakages cause loom stoppages and, hence, production and quality interruptions. To mitigate this problem, the warp yarns should be treated with a thin, strong film of an appropriate adhesive. The aim of this study is therefore, to investigate the effect of sizing machine parameters on tensile properties of the yarn and to optimize the sized yarn tensile properties. Design expert 11 software with Box-Behnken design has been employed to design the research, analyze the results of experiments, and optimize the responses. In this research, three factors, each at three levels (wet zone yarn tension (A) (340, 380, and 420 N), squeezing roller pressure (B) (13, 15, and 17 N), and sizing machine speed (C) (30, 49, and 68 m/min), as well as three response variables (gain strength, loss elongation, and stretch), are considered. 15 samples of sized yarn have been produced with various combinations of the given factors, and the values of the response variables are measured for each sample. It has been observed that wet zone yarn tension and squeezing roller pressure have a significant effect on gain strength, stretch, and loss elongation. According to the regression analysis, gain strength has a negative relationship with wet zone yarn tension and a positive relationship with squeezing roller pressure. In the other case, both wet-zone yarn tension and squeezing roller pressure have a positive and significant effect on loss elongation and yarn stretch. At 340 N wet zone yarn tension, 13 N squeezing roller pressure, and 51 m/min sizing machine speed, the optimum values of gain strength (32.7 cN/tex), loss elongation (18.5%), and stretch (1.4%) were obtained. The methodologies employed in this study revealed the empirical relationship between the factors and the responses, the interaction effects of the factors on the responses, and multiple response optimizations. The optimized result of this study can be applied to the warp yarn sizing and can improve the tensile properties of the yarn and the loom’s efficiency significantly.
Multiple response optimization of sizing machine settings and sized yarn tensile properties using advanced method of experimental design
Journal of Engineered Fibers and Fabrics
On a loom, the warp yarns experience exceptionally high mechanical stresses and strains, as well ... more On a loom, the warp yarns experience exceptionally high mechanical stresses and strains, as well as significant abrasion from friction. As a result, significant yarn breakages cause loom stoppages and, hence, production and quality interruptions. To mitigate this problem, the warp yarns should be treated with a thin, strong film of an appropriate adhesive. The aim of this study is therefore, to investigate the effect of sizing machine parameters on tensile properties of the yarn and to optimize the sized yarn tensile properties. Design expert 11 software with Box-Behnken design has been employed to design the research, analyze the results of experiments, and optimize the responses. In this research, three factors, each at three levels (wet zone yarn tension (A) (340, 380, and 420 N), squeezing roller pressure (B) (13, 15, and 17 N), and sizing machine speed (C) (30, 49, and 68 m/min), as well as three response variables (gain strength, loss elongation, and stretch), are considered. ...
Analyzing the Effect of Various Sizing Machine Settings on Abrasion Resistance and Size Pick-Up of Polyester/Cotton Blend Sized Yarn Using Box-Behnken Design
Journal of Natural Fibers
Effect of Cotton/Polyester Blend Ratio, Loom Speed, and Air Pressure on Yarn Twist Loss and Yarn Strength Loss: The Case of Air-Jet Loom
Journal of Natural Fibers
Advances in Materials Science and Engineering
Cattle hoofs are abundantly available by-product sources of organic material from the slaughterho... more Cattle hoofs are abundantly available by-product sources of organic material from the slaughterhouse. It can be successfully converted into keratin protein. Keratin extracted using alkali hydrolysis has a better conservancy of keratin structure. The purpose of this study is optimizing the extraction of keratin from cuttle hoof. Designing of the experiment, analysis of the results, and optimization of the process parameters have been conducted by central composite design (CCD). Three factors (temperature (A), time (B), and concentration of NaOH (C)) each at five levels have been used to extract the keratin protein from cattle hoof and two response variables (dissolution % and purity %) have been considered in the study. The results obtained demonstrate that extraction temperature, alkali concentration, and time showed a significant effect on the purity and dissolution of keratin. The regression model shows that all factors have positive and significant relation with dissolution perce...
Optimization of air pressure and speed of air jet loom; impact on fabric tensile and tear strength properties using Response Surface Methodology
Journal of Natural Fibers, 2022
Effect of yarn twist on tensile strength, abrasion and pilling resistance of plain-woven cotton fabric
Indian Journal of Fibre & Textile Research (IJFTR), Sep 21, 2021
Sustainability
The meat processing industry produces a huge quantity of by-products, approximately 150 million t... more The meat processing industry produces a huge quantity of by-products, approximately 150 million tonnes per year. The live weight of the animals is distinguished as edible, inedible, and discardable by-products, with the discardable parts equating to 66%, 52%, and 80% of the overall live weight of cattle, lamb, and pigs, respectively. Only a small percentage of those by-products are nowadays exploited for the production of high added value products such as animal feed, glue, fertilizers, etc., whereas the main management method is direct disposal to landfills. As such, the current disposal methodologies of these by-products are problematic, contributing to environmental contamination, soil degradation, air pollution, and possible health problems. Nevertheless, these by-products are rich in collagen, keratin, and minerals, being thus promising sources of high-value materials such as bioenergy, biochemical and other biomaterials that could be exploited in various industrial application...
A techno-economic feasibility of a process for extraction of starch from waste avocado seeds
Clean Technologies and Environmental Policy, 2020
Abstract Generation of waste from the agro-processing industry is continually increasing due to i... more Abstract Generation of waste from the agro-processing industry is continually increasing due to increasing needs for food security. Beneficiation of this waste has both economic and environmental impacts that can be overcome via implementation of cleaner production technologies. Starch is a renewable biopolymer material which is completely biodegradable, easy to handle and widely available in nature. It has wide applications in various industries including food processing, pharmaceutical, confection, beverage, pulp and paper, chemical, cosmetic, binder and adhesive, packaging and printing, fermentation and textile industries. We have previously demonstrated that high-quality industrial-grade starch can be extracted from waste avocado seeds. This report is focussed on a techno-economic evaluation of the extraction process. It can be concluded, from the study that extraction of starch from waste avocado seeds is economically feasible with an accounting rate of return of 75% and a break-even analysis of 82% with a payback period of 2 years. The process is environmentally sustainable in that minimal amounts of chemicals are used in the extraction process and the wastes generated can be beneficiated into high-value products that can add further to the profitability of the venture. Graphic abstract
TEKSTILEC, 2022
Yarn tensile properties, unevenness, and irregularities are the most important properties of the ... more Yarn tensile properties, unevenness, and irregularities are the most important properties of the yarn quality parameters that determine the fabric’s mechanical properties and appearance. In the current study, the combined effect of carding machine parameters (cylinder speed, flat speed, cylinder to flat setting, and taker-in speed) on yarn properties (yarn strength, elongation, unevenness, and total yarn imperfection) have been examined. In this research, 40 samples of open-end yarn were produced and each of them was tested for their strength, elongation, unevenness, and imperfection. Design-expert 7.0.0 software and Factorial designing have been employed to analyze the results. The results from statistical analysis have showed that increasing the gap between the cylinder and flat setting and increasing the taker-in speed increased yarn unevenness and increasing cylinder speed, flat speed, and taker-in speed increased total yarn imperfection significantly. Similarly, increasing the ...
Beneficiation of avocado processing industry by-product: A review on future prospect
Current Research in Green and Sustainable Chemistry, 2022
Journal of Engineering, 2021
This paper aims at the extraction and application of eco- and user-friendly natural gum obtained ... more This paper aims at the extraction and application of eco- and user-friendly natural gum obtained from Commiphora Africana tree. The result obtained is also compared with fabric treated with a commercial softener of the same concentration. The gum was extracted by puncturing the stem of the plant and the extracted gum was applied directly to 100% cotton fabric through a padding process with different concentrations of extracted gum (i.e., 20 gram per litre (g/l), 25 g/l, and 30 g/l). Another similar fabric sample was treated with a silicon softener of the same concentration. The fabric samples treated with both natural gum and silicon softener were tested for their stiffness, crease recovery, and drapability. The results show that the change in fabric softness depends on the concentration of softener used in both cases. As the concentration of the softener increased, there was a decrease in bending length and drape coefficient for both fabric samples. The drape coefficient of fabric ...