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X Shen - One of the best experts on this subject based on the ideXlab platform.
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an investigation into the hydraulic properties of Needle Punched Nonwovens for application in wet press concrete casting part i wet press concrete casting
Journal of The Textile Institute, 2000Co-Authors: C A Lawrence, X ShenAbstract:A study was made of the hydraulic performance of polypropylene nonwoven fabrics employed as absorbent form-liners in the production of wet-press concrete flags. Cellulose paper is traditionally used. It was found that, during pressing of the concrete mix, the expressed water was discharged from the mould through the nonwoven fabrics by contra-directional flow, whereas the paper liners effected unidirectional flow. When used only once, the paper, owing to its smaller pore size, gave a lower particle content of tbe filtrate than did the Nonwovens. However, with repeated use of the paper liner, tbe particle content of tbe filtrate and the particle contamination of tbe paper rapidly exceeded that for repeated use of tbe Nonwovens.
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An Investigation into the Hydraulic Properties of Needle-Punched Nonwovens for Application in Wet-press Concrete Casting Part II: Predictive Models for the Water Permeability of Needle-Punched Nonwoven Fabrics
Journal of The Textile Institute, 2000Co-Authors: C A Lawrence, X ShenAbstract:A review of various models for predicting the water permeability of fibrous structures is reported. Using the Hagen–Poiseuille formula, a modified form of the Kozeny–Carman equation was derived. An apparatus was constructed that enabled cross-plane and in-plane water permeabilities of various Needle-Punched nonwoven fabrics to be measured under a range of compressive loads applied to the fabrics. Fabrics were made from 3, 6, 10, and 17 denier polypropylene fibres and the measured permeability values were compared with predicted values obtained from the various models. Three of the models gave reasonable agreement with the experimental data for cross-plane water permeability. However, a suitable model has yet to be developed which gives adequate predictions of the in-plane water permeability of Needle-Punched nonwoven structures.
C A Lawrence - One of the best experts on this subject based on the ideXlab platform.
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an investigation into the hydraulic properties of Needle Punched Nonwovens for application in wet press concrete casting part i wet press concrete casting
Journal of The Textile Institute, 2000Co-Authors: C A Lawrence, X ShenAbstract:A study was made of the hydraulic performance of polypropylene nonwoven fabrics employed as absorbent form-liners in the production of wet-press concrete flags. Cellulose paper is traditionally used. It was found that, during pressing of the concrete mix, the expressed water was discharged from the mould through the nonwoven fabrics by contra-directional flow, whereas the paper liners effected unidirectional flow. When used only once, the paper, owing to its smaller pore size, gave a lower particle content of tbe filtrate than did the Nonwovens. However, with repeated use of the paper liner, tbe particle content of tbe filtrate and the particle contamination of tbe paper rapidly exceeded that for repeated use of tbe Nonwovens.
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An Investigation into the Hydraulic Properties of Needle-Punched Nonwovens for Application in Wet-press Concrete Casting Part II: Predictive Models for the Water Permeability of Needle-Punched Nonwoven Fabrics
Journal of The Textile Institute, 2000Co-Authors: C A Lawrence, X ShenAbstract:A review of various models for predicting the water permeability of fibrous structures is reported. Using the Hagen–Poiseuille formula, a modified form of the Kozeny–Carman equation was derived. An apparatus was constructed that enabled cross-plane and in-plane water permeabilities of various Needle-Punched nonwoven fabrics to be measured under a range of compressive loads applied to the fabrics. Fabrics were made from 3, 6, 10, and 17 denier polypropylene fibres and the measured permeability values were compared with predicted values obtained from the various models. Three of the models gave reasonable agreement with the experimental data for cross-plane water permeability. However, a suitable model has yet to be developed which gives adequate predictions of the in-plane water permeability of Needle-Punched nonwoven structures.
Alagirusamy R - One of the best experts on this subject based on the ideXlab platform.
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Water filtration using nonwoven cartridge filter system
Indian Journal of Fibre & Textile Research (IJFTR), 2020Co-Authors: Gadkari Rahul, Kuma Ipi, Ali Wazed, Das Apurba, Alagirusamy RAbstract:A cartridge based fibrous filtration system has been designed and investigated. For the fibrous medium, Needle-punch nonwoven structure has been selected and different nonwoven samples are analysed for the water purification. A series of different Needle-Punched Nonwovens made of polypropylene have been produced by changing mass per unit area, needling density and fibre linear density. A chemical oxygen demand test has been employed to obtain the filtration efficiency (FE). The FE obtained for these samples ranges from 8.84% to 78.04% in purifying the reference water (mud water). It has been found that the FE increases with increase in mass per unit area and needling density (p < 0.01). Also, the filter media made of finer fibres displays higher FE than coarser fibre (p < 0.01). On examining the filter performance in multiple filtration cycles, it is found that the FE increases initially and finally reaches to a saturation value. A good correlation (r2 > 0.95) has been found for the FE of each cycle with the air permeability, thickness and weight density of the loaded filter. The FE of the bare nonwoven (maximum FE) further improves (95%) by incorporating activated particles
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Water filtration using nonwoven cartridge filter system
NISCAIR-CSIR India, 2020Co-Authors: Gadkari Rahul, Kuma Ipi, Ali Wazed, Das Apurba, Alagirusamy RAbstract:72-79A cartridge based fibrous filtration system has been designed and investigated. For the fibrous medium, Needle-punch nonwoven structure has been selected and different nonwoven samples are analysed for the water purification. A series of different Needle-Punched Nonwovens made of polypropylene have been produced by changing mass per unit area, needling density and fibre linear density. A chemical oxygen demand test has been employed to obtain the filtration efficiency (FE). The FE obtained for these samples ranges from 8.84% to 78.04% in purifying the reference water (mud water). It has been found that the FE increases with increase in mass per unit area and needling density (p r2 > 0.95) has been found for the FE of each cycle with the air permeability, thickness and weight density of the loaded filter. The FE of the bare nonwoven (maximum FE) further improves (95%) by incorporating activated particles
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Study of cyclic bursting loading on Needle-Punched Nonwovens: Part II – Change in air permeability and compression behavior
NISCAIR-CSIR India, 2018Co-Authors: Kumar Bipin, Das Apurba, Sharma Atul, Krishnasamy Jagatheesan, Alagirusamy RAbstract:203-208Efforts have been made to investigate the physical properties of Needle-Punched Nonwovens, such as compression and air permeability, before and after the application of cyclic bursting pressure. It is observed that the structural parameters, such as areal density, needling density and fibre fineness, have significant effect on the aforementioned fabric characteristics. More compression is observed in a sample with low mass density. Sample made of coarser fibre shows lower compression as compared to finer fibre samples. The air permeability decreases with increase in mass density. On conducting cyclic bursting test on a sample, the values of air permeability and compression change significantly. The cyclic parameters, such as pressure magnitude and rest time at cyclic peak pressure, cause significant structural changes and reorientation of the fibre during deformation. Increase in pressure and rest time causes increase in compression parameter (α) and air permeability. Nevertheless, at low cyclic pressure level (10% of bursting pressure), the network becomes compact due to fibrous reorientation, and therefore both the values of compression parameter (α) and air permeability show initial drop. On examining the samples made of coarser and finer fibres, the variation is observed in the extent of change in the air permeability
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Cyclic bursting loading on Needle-Punched Nonwovens: Part I – Distention behavior
NISCAIR-CSIR India, 2018Co-Authors: Kumar Bipin, Das Apurba, Sharma Atul, Krishnasamy Jagatheesan, Alagirusamy RAbstract:20-24The present study aims at examining different Needle-Punched polypropylene Nonwovens under different cyclic bursting pressure. Various fabric parameters including mass density, punch density and fibre fineness have been investigated. For the cyclic test, the distension is measured at different cyclic bursting pressures proportionate to the bursting strength of the fabric. Other parameters including the cyclic pressure magnitude, the number of cycles, and the rest time at peak pressure have also been investigated. It has been found that the bursting strength and distension of fabric increase with an increase in mass density, while they show opposite trend with punch density and fibre denier (p < 0.01). The distension value of each sample increases with an increase in the cyclic parameters i.e. number of loading cycle, rest time and pressure peak
Ramasamy Alagirusamy - One of the best experts on this subject based on the ideXlab platform.
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Study of Cyclic Bursting Loading on Needle-Punched Nonwovens: Part II–Change in Air Permeability and Compression Behavior
Indian Journal of Fibre & Textile Research, 2018Co-Authors: Bipin Kumar, Apurba Das, Atul Sharma, Jagatheesan Krishnasamy, Ramasamy AlagirusamyAbstract:Efforts have been made to investigate the physical properties of Needle-Punched Nonwovens, such as compression and air permeability, before and after the application of cyclic bursting pressure. It is observed that the structural parameters, such as areal density, needling density and fibre fineness, have significant effect on the aforementioned fabric characteristics. More compression is observed in a sample with low mass density. Sample made of coarser fibre shows lower compression as compared to finer fibre samples. The air permeability decreases with increase in mass density. On conducting cyclic bursting test on a sample, the values of air permeability and compression change significantly. The cyclic parameters, such as pressure magnitude and rest time at cyclic peak pressure, cause significant structural changes and reorientation of the fibre during deformation. Increase in pressure and rest time causes increase in compression parameter (α) and air permeability. Nevertheless, at low cyclic pressure level (10% of bursting pressure), the network becomes compact due to fibrous reorientation, and therefore both the values of compression parameter (α) and air permeability show initial drop. On examining the samples made of coarser and finer fibres, the variation is observed in the extent of change in the air permeability.
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cyclic bursting loading on Needle Punched Nonwovens part i distention behavior
Indian Journal of Fibre & Textile Research, 2018Co-Authors: Bipin Kumar, Atul Sharma, Jagatheesan Krishnasamy, A Das, Ramasamy AlagirusamyAbstract:The present study aims at examining different Needle-Punched polypropylene Nonwovens under different cyclic bursting pressure. Various fabric parameters including mass density, punch density and fibre fineness have been investigated. For the cyclic test, the distension is measured at different cyclic bursting pressures proportionate to the bursting strength of the fabric. Other parameters including the cyclic pressure magnitude, the number of cycles, and the rest time at peak pressure have also been investigated. It has been found that the bursting strength and distension of fabric increase with an increase in mass density, while they show opposite trend with punch density and fibre denier (p < 0.01). The distension value of each sample increases with an increase in the cyclic parameters i.e. number of loading cycle, rest time and pressure peak.
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Characterization of liquid transport in Needle-Punched Nonwovens. I. Wicking under infinite liquid reservoir
Fibers and Polymers, 2014Co-Authors: B. Kumar, Ramasamy Alagirusamy, A Das, J. Singh, V. Garg, R. GuptaAbstract:The study of wicking characteristics of fibrous materials has received significant attention from both academic and industry over many decades. Wicking describes the liquid transport behavior of fibrous assemblies, and plays a critical role in the processing and end use of Nonwovens in many application areas including medical, geotextiles, filtration, etc. However, the analysis of wicking in a nonwoven materials is complex because of random arrangement of capillary tubes formed by fibers, and therefore, we must have to rely on the experimental techniques to appraise their wicking performance. In the present work, the wicking characteristics (rate and amount of liquid rise) of different Nonwovens (made from polypropylene fibers) under an unlimited or infinite liquid reservoir system has been analyzed using a newly developed computerized wicking apparatus based on capacitance principle. Some factors, i.e., fiber denier, mass per unit area and needling density, were chosen for the experimental plan to find their significance on the vertical wicking. It has been found that the rate and extent of wicking is significantly affected by changing the levels of above factors (p
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characterization of liquid transport in Needle Punched Nonwovens i wicking under infinite liquid reservoir
Fibers and Polymers, 2014Co-Authors: Bipin Kumar, Ramasamy Alagirusamy, A Das, J. Singh, V. Garg, R. GuptaAbstract:The study of wicking characteristics of fibrous materials has received significant attention from both academic and industry over many decades. Wicking describes the liquid transport behavior of fibrous assemblies, and plays a critical role in the processing and end use of Nonwovens in many application areas including medical, geotextiles, filtration, etc. However, the analysis of wicking in a nonwoven materials is complex because of random arrangement of capillary tubes formed by fibers, and therefore, we must have to rely on the experimental techniques to appraise their wicking performance. In the present work, the wicking characteristics (rate and amount of liquid rise) of different Nonwovens (made from polypropylene fibers) under an unlimited or infinite liquid reservoir system has been analyzed using a newly developed computerized wicking apparatus based on capacitance principle. Some factors, i.e., fiber denier, mass per unit area and needling density, were chosen for the experimental plan to find their significance on the vertical wicking. It has been found that the rate and extent of wicking is significantly affected by changing the levels of above factors (p<0.05). The rate and amount of liquid rise was increasing with increase in needling density and mass per unit area of nonwoven samples. Samples made from higher fiber denier (15 denier) were showing poor wicking results compared to lower denier samples (2.5 and 6 denier). Further work is still needed to examine other factors on the wicking to further improve our understanding of liquid transport in such highly complex porous networks.
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Filtration characteristics of spun-laid nonwoven fabrics
2009Co-Authors: Ramasamy Alagirusamy, K. Rajan NagendraAbstract:The filtration behaviour of two types of spun-laid nonwoven fabrics, namely thermobonded and Needle-Punched, with wide range of physical parameters has been studied. A computerized air filtration apparatus has been designed and developed for measuring the air filtration characteristics of different types of filter fabrics. The developed apparatus measures the filtration parameters following the principle of dry filtration mechanisms. Needle-Punched Nonwovens show good filtration efficiency with lower pressure drop than the corresponding thermobonded Nonwovens. Overall, the NeedlePunched fabrics perform better as a filter fabric in comparison to thermobonded Nonwovens.
Erdem Koç - One of the best experts on this subject based on the ideXlab platform.
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An analysis on abrasion resistance of polyester-/viscose-blended Needle-Punched Nonwovens
Journal of The Textile Institute, 2013Co-Authors: Erdem Koç, Emel ÇinçikAbstract:In this study, the influence of fiber composition and process parameters such as mass per unit area and punching density on abrasion resistance of polyester-/viscose-blended Needle-Punched Nonwovens has been investigated. For this purpose, five different blend ratios of polyester/viscose webs were produced, cross-lapped, and Needled in four different mass per unit areas and three different needling/punching densities. The abrasion resistance and thickness of the Nonwovens were determined by performing the standard test methods. The structural parameters such as fabric bulk density and fiber volume fraction were calculated and the data obtained from tests and calculations were analyzed in detail. It was concluded that abrasion resistance of the Needle-Punched Nonwovens decreased with the increase of polyester proportion in the mixture and increased with the increase in mass per unit area. Also, an increase in punching density first caused to increase in abrasion resistance and then further increase in punc...
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the effect of blend ratio and process parameters on tensile properties of polyester viscose blended Needle Punched Nonwovens
Fibers and Polymers, 2013Co-Authors: Emel Çinçik, Erdem KoçAbstract:In this study, the tensile strength and elongation of polyester/viscose blended Needle-Punched Nonwovens were analyzed. For this purpose, five different blend ratios of polyester/viscose webs were produced, cross-lapped and Needled in four different mass per unit areas and three different needling/punching densities. The tensile properties of the Nonwovens were determined by performing the standard test methods and the data obtained from tests were statistically analyzed in Design Expert software. In addition, a mixture process crossed regression model with two mixture components (polyester and viscose blend ratios) and two process variables (fabric mass per unit area and needling density) was developed to analyze the tensile strength and elongation of polyester/viscose blended Needled Nonwovens. In conclusion, the regression model indicated that the tensile strength of the Needle-Punched Nonwovens decreases with the increase of polyester proportion in the mixture and increases with the increase in mass per unit area and punching density.
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The effect of blend ratio and process parameters on tensile properties of polyester/viscose blended Needle-Punched Nonwovens
Fibers and Polymers, 2013Co-Authors: Emel Çinçik, Erdem KoçAbstract:In this study, the tensile strength and elongation of polyester/viscose blended Needle-Punched Nonwovens were analyzed. For this purpose, five different blend ratios of polyester/viscose webs were produced, cross-lapped and Needled in four different mass per unit areas and three different needling/punching densities. The tensile properties of the Nonwovens were determined by performing the standard test methods and the data obtained from tests were statistically analyzed in Design Expert software. In addition, a mixture process crossed regression model with two mixture components (polyester and viscose blend ratios) and two process variables (fabric mass per unit area and needling density) was developed to analyze the tensile strength and elongation of polyester/viscose blended Needled Nonwovens. In conclusion, the regression model indicated that the tensile strength of the Needle-Punched Nonwovens decreases with the increase of polyester proportion in the mixture and increases with the increase in mass per unit area and punching density.
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an investigation on bursting strength of polyester viscose blended Needle Punched Nonwovens
Textile Research Journal, 2012Co-Authors: Erdem Koç, Emel ÇinçikAbstract:The aim of this study is to analyze the bursting strength of polyester/viscose blended Needle-Punched Nonwovens. For this purpose, five different blend ratios of polyester/viscose webs were produced, cross-lapped and Needled in four different mass per unit areas and three different needling/punching densities. The bursting strength of 60 Nonwovens was determined by performing the standard test method; the data obtained from tests were statistically analyzed in Design Expert software. In addition, a mixture process crossed-regression model with two mixture components (polyester and viscose blend ratios) and two process variables (fabric mass per unit area and needling density) was developed to analyze the bursting strength of polyester/viscose blended Needled Nonwovens. In conclusion, the regression model indicated that the bursting strength of the Needle-Punched Nonwovens initially decreases and then increases with the increase of polyester fiber in the mixture and with the increase in mass per unit area....
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An investigation on bursting strength of polyester/viscose blended Needle-Punched Nonwovens
Textile Research Journal, 2012Co-Authors: Erdem Koç, Emel ÇinçikAbstract:The aim of this study is to analyze the bursting strength of polyester/viscose blended Needle-Punched Nonwovens. For this purpose, five different blend ratios of polyester/viscose webs were produced, cross-lapped and Needled in four different mass per unit areas and three different needling/punching densities. The bursting strength of 60 Nonwovens was determined by performing the standard test method; the data obtained from tests were statistically analyzed in Design Expert software. In addition, a mixture process crossed-regression model with two mixture components (polyester and viscose blend ratios) and two process variables (fabric mass per unit area and needling density) was developed to analyze the bursting strength of polyester/viscose blended Needled Nonwovens. In conclusion, the regression model indicated that the bursting strength of the Needle-Punched Nonwovens initially decreases and then increases with the increase of polyester fiber in the mixture and with the increase in mass per unit area....
