Journal of Engineered Fibers and Fabrics, Jul 12, 2019
In this study, stainless steel, copper, and silver wires were intermingled with two polyamide 6.6... more In this study, stainless steel, copper, and silver wires were intermingled with two polyamide 6.6 filaments through the commingling technique to produce three-component hybrid yarns. The produced hybrid yarns were used as weft in the structure of plain woven fabric samples. The electromagnetic shielding effectiveness parameters of samples were measured in the frequency range of 0.8–5.2 GHz by the free space technique. The effects of metal hybrid yarn placement, number of fabric layers, metal types, and wave polarization on the electromagnetic shielding effectiveness and absorption and reflection properties of the woven fabrics were analyzed statistically at low and high frequencies separately. As a result, the samples have no shielding property in the warp direction. Metal types show no statistically significant effect on electromagnetic shielding effectiveness. However, fabrics containing stainless steel have a higher absorption power ratio than copper and silver samples. Double-layer samples have higher electromagnetic shielding effectiveness values than single-layer fabrics in both frequency ranges. However, the number of layers does not have a significant effect on the absorbed and reflected power in the range of 0.8–2.6 GHz. There was a significant difference above 2.6 GHz frequency for absorbed power ratio. An increase in the density of hybrid yarns in the fabric structure leads to an increase in the electromagnetic shielding effectiveness values. Two-metal placement has a higher absorbed power than the full and one metal placements, respectively. The samples which have double layers and including metal wire were in their all wefts reached the maximum electromagnetic shielding effectiveness values for stainless steel (78.70 dB), copper (72.69 dB), and silver composite (57.50 dB) fabrics.
Journal of Engineered Fibers and Fabrics, Dec 16, 2019
In this study, antimicrobial and electromagnetic shielding properties of metal composite single j... more In this study, antimicrobial and electromagnetic shielding properties of metal composite single jersey fabrics were investigated. For this purpose, stainless steel wire, copper wire, and metalized silver polyamide filament were commingled with textured polyester. The composite yarns were knitted to single jersey fabrics. Electromagnetic shielding effectiveness of samples was measured according to free space test method between 0.8 and 5.2 GHz frequency range. In addition, antibacterial and antifungal activity tests were performed for the overall technical characterization of composite fabrics. The effects of metal type, filament form on electromagnetic shielding effectiveness, and antimicrobial properties were examined. All composite fabrics showed electromagnetic shielding properties at different levels up to 35 dB in vertical direction. Fabrics including metalized multifilament yarn exhibit higher electromagnetic shielding effectiveness in both vertical and horizontal directions. In addition, antibacterial activity level of metalized silver polyamide and copper composite fabrics reached up to 99% against Klebsiella pneumoniae and Staphylococcus aureus. Furthermore, Aspergillus niger could not grow on these composite fabrics.
ABSTRACT In this study, the effects of selected intermingling process parameters on yarn breaking... more ABSTRACT In this study, the effects of selected intermingling process parameters on yarn breaking strength and elongation were predicted using artificial neural network. For this aim, partially oriented polyester yarn with 283 dtex linear density and three different numbers of filaments (34, 68, and 100) were used for producing interlaced yarn under different process parameters (speed and pressure). Yarns’ elongation and strength values measured with Uster Tensorapid test device and the number of filaments are input variables of the artificial neural networks. Feed forward neural network (FFNN) is used as the network structure. All FFNN computations were performed by MATLAB software package. The comparison results show that the FFNN has a better prediction performance than linear regression.
Free diving is a type of underwater sport that the diver holding his or her bread until resurfaci... more Free diving is a type of underwater sport that the diver holding his or her bread until resurfacing. Systems of constitute the human body are operating normally under the standard air pressure on land. Underwater contains outer factors whcih aredifferent from the human body is adapted. Moreover, breath-hold action that is performed during free diving creates different effects especially on respiratory and circulation systems. Shallow water blackout causes loss of consciousness very quickly with the effects of various factors (hyperventilation, inexperience, individual factors etc.) generally about 5 meters before from the water surface and has fatal consequences. It is aimed to prevent loss of life resulting from shallow water blackout with the designed free diving airbag.
In this Project, a new air-jet will be designed by using CFD-analysis to combine lubrication and ... more In this Project, a new air-jet will be designed by using CFD-analysis to combine lubrication and pre-intermingling processes that applied during the production of filament. Designed jet will allow feeding the lubricant in yarn channel with air flow. Thus, a homogeneous lubrication will be provided. So, it is aimed to decline in the cost of production.
There is much more dust-induced risk in spinning, weaving and knitting factories than others. The... more There is much more dust-induced risk in spinning, weaving and knitting factories than others. Therefore, employees have to use personal protective dust masks in particularly dusty environments. On the other hand, high humidity and temperature of cotton textile factories make the workers feel uncomfortable and so, they don’t want to use masks. In this project, it is aimed to design and produce valved dust mask integrated non woven filters including eucalyptus oil. Thus, workers with these masks in textile factories will feel more comfortable and they will be able to breathe more easily.
Hair is an important part of people's appearance. Cleaning, care and appearance of hairs are ... more Hair is an important part of people's appearance. Cleaning, care and appearance of hairs are effective factors on the people's psychology and social relations. There are many external factors having negative effect on hair structure. Consciously hair treatments improve the quality of hair and reduce hair loss. Many chemicals manufacturer is launching several products for using in hair care. Many of these products comprise the amino acids constituting the basic structure of hair. With this project, cysteine microcapsules which the most abundant amino acid in the hair structure will be produced and appliqued to textile surfaces. These surfaces can be used in hair-contacting products (scarf, hat, bandana, beret etc.) and provide hair treatment functions.
Sports mat is an auxiliary material that is widely used in sportive activities. Mat creates cushi... more Sports mat is an auxiliary material that is widely used in sportive activities. Mat creates cushioning effect between human body and floor so it prevents injuries resulting from the hardness of ground and provides comfort during the movements. On the other hand, mat does not allow air circulation thus causes excessive sweating and feeling of discomfort during the activity. Spacer fabrics have special properties could not provide by conventional textile structures. The most obvious characteristics of spacer fabrics can be listed as very high compressive strength, high air permeability, good elasticity, chemical resistance, high bending performance and drapability.
ABSTRACT In this study, the effects of selected intermingling process parameters on yarn breaking... more ABSTRACT In this study, the effects of selected intermingling process parameters on yarn breaking strength and elongation were predicted using artificial neural network. For this aim, partially oriented polyester yarn with 283 dtex linear density and three different numbers of filaments (34, 68, and 100) were used for producing interlaced yarn under different process parameters (speed and pressure). Yarns’ elongation and strength values measured with Uster Tensorapid test device and the number of filaments are input variables of the artificial neural networks. Feed forward neural network (FFNN) is used as the network structure. All FFNN computations were performed by MATLAB software package. The comparison results show that the FFNN has a better prediction performance than linear regression.
Nowadays electrical and electronic devices are widely used. It is known that the electromagnetic ... more Nowadays electrical and electronic devices are widely used. It is known that the electromagnetic waves emitted from electronic devices have negative effects on human health and environment. Reducing the damages caused by electromagnetic waves has become extremely important. Electrically conductive textile surfaces are used for shielding undesired electromagnetic waves. In the project, it is aimed to develop textile-based wallpaper in order to avoid the negative effects of electromagnetic waves.
Journal of Engineered Fibers and Fabrics, Jul 12, 2019
In this study, stainless steel, copper, and silver wires were intermingled with two polyamide 6.6... more In this study, stainless steel, copper, and silver wires were intermingled with two polyamide 6.6 filaments through the commingling technique to produce three-component hybrid yarns. The produced hybrid yarns were used as weft in the structure of plain woven fabric samples. The electromagnetic shielding effectiveness parameters of samples were measured in the frequency range of 0.8–5.2 GHz by the free space technique. The effects of metal hybrid yarn placement, number of fabric layers, metal types, and wave polarization on the electromagnetic shielding effectiveness and absorption and reflection properties of the woven fabrics were analyzed statistically at low and high frequencies separately. As a result, the samples have no shielding property in the warp direction. Metal types show no statistically significant effect on electromagnetic shielding effectiveness. However, fabrics containing stainless steel have a higher absorption power ratio than copper and silver samples. Double-layer samples have higher electromagnetic shielding effectiveness values than single-layer fabrics in both frequency ranges. However, the number of layers does not have a significant effect on the absorbed and reflected power in the range of 0.8–2.6 GHz. There was a significant difference above 2.6 GHz frequency for absorbed power ratio. An increase in the density of hybrid yarns in the fabric structure leads to an increase in the electromagnetic shielding effectiveness values. Two-metal placement has a higher absorbed power than the full and one metal placements, respectively. The samples which have double layers and including metal wire were in their all wefts reached the maximum electromagnetic shielding effectiveness values for stainless steel (78.70 dB), copper (72.69 dB), and silver composite (57.50 dB) fabrics.
Journal of Engineered Fibers and Fabrics, Dec 16, 2019
In this study, antimicrobial and electromagnetic shielding properties of metal composite single j... more In this study, antimicrobial and electromagnetic shielding properties of metal composite single jersey fabrics were investigated. For this purpose, stainless steel wire, copper wire, and metalized silver polyamide filament were commingled with textured polyester. The composite yarns were knitted to single jersey fabrics. Electromagnetic shielding effectiveness of samples was measured according to free space test method between 0.8 and 5.2 GHz frequency range. In addition, antibacterial and antifungal activity tests were performed for the overall technical characterization of composite fabrics. The effects of metal type, filament form on electromagnetic shielding effectiveness, and antimicrobial properties were examined. All composite fabrics showed electromagnetic shielding properties at different levels up to 35 dB in vertical direction. Fabrics including metalized multifilament yarn exhibit higher electromagnetic shielding effectiveness in both vertical and horizontal directions. In addition, antibacterial activity level of metalized silver polyamide and copper composite fabrics reached up to 99% against Klebsiella pneumoniae and Staphylococcus aureus. Furthermore, Aspergillus niger could not grow on these composite fabrics.
ABSTRACT In this study, the effects of selected intermingling process parameters on yarn breaking... more ABSTRACT In this study, the effects of selected intermingling process parameters on yarn breaking strength and elongation were predicted using artificial neural network. For this aim, partially oriented polyester yarn with 283 dtex linear density and three different numbers of filaments (34, 68, and 100) were used for producing interlaced yarn under different process parameters (speed and pressure). Yarns’ elongation and strength values measured with Uster Tensorapid test device and the number of filaments are input variables of the artificial neural networks. Feed forward neural network (FFNN) is used as the network structure. All FFNN computations were performed by MATLAB software package. The comparison results show that the FFNN has a better prediction performance than linear regression.
Free diving is a type of underwater sport that the diver holding his or her bread until resurfaci... more Free diving is a type of underwater sport that the diver holding his or her bread until resurfacing. Systems of constitute the human body are operating normally under the standard air pressure on land. Underwater contains outer factors whcih aredifferent from the human body is adapted. Moreover, breath-hold action that is performed during free diving creates different effects especially on respiratory and circulation systems. Shallow water blackout causes loss of consciousness very quickly with the effects of various factors (hyperventilation, inexperience, individual factors etc.) generally about 5 meters before from the water surface and has fatal consequences. It is aimed to prevent loss of life resulting from shallow water blackout with the designed free diving airbag.
In this Project, a new air-jet will be designed by using CFD-analysis to combine lubrication and ... more In this Project, a new air-jet will be designed by using CFD-analysis to combine lubrication and pre-intermingling processes that applied during the production of filament. Designed jet will allow feeding the lubricant in yarn channel with air flow. Thus, a homogeneous lubrication will be provided. So, it is aimed to decline in the cost of production.
There is much more dust-induced risk in spinning, weaving and knitting factories than others. The... more There is much more dust-induced risk in spinning, weaving and knitting factories than others. Therefore, employees have to use personal protective dust masks in particularly dusty environments. On the other hand, high humidity and temperature of cotton textile factories make the workers feel uncomfortable and so, they don’t want to use masks. In this project, it is aimed to design and produce valved dust mask integrated non woven filters including eucalyptus oil. Thus, workers with these masks in textile factories will feel more comfortable and they will be able to breathe more easily.
Hair is an important part of people's appearance. Cleaning, care and appearance of hairs are ... more Hair is an important part of people's appearance. Cleaning, care and appearance of hairs are effective factors on the people's psychology and social relations. There are many external factors having negative effect on hair structure. Consciously hair treatments improve the quality of hair and reduce hair loss. Many chemicals manufacturer is launching several products for using in hair care. Many of these products comprise the amino acids constituting the basic structure of hair. With this project, cysteine microcapsules which the most abundant amino acid in the hair structure will be produced and appliqued to textile surfaces. These surfaces can be used in hair-contacting products (scarf, hat, bandana, beret etc.) and provide hair treatment functions.
Sports mat is an auxiliary material that is widely used in sportive activities. Mat creates cushi... more Sports mat is an auxiliary material that is widely used in sportive activities. Mat creates cushioning effect between human body and floor so it prevents injuries resulting from the hardness of ground and provides comfort during the movements. On the other hand, mat does not allow air circulation thus causes excessive sweating and feeling of discomfort during the activity. Spacer fabrics have special properties could not provide by conventional textile structures. The most obvious characteristics of spacer fabrics can be listed as very high compressive strength, high air permeability, good elasticity, chemical resistance, high bending performance and drapability.
ABSTRACT In this study, the effects of selected intermingling process parameters on yarn breaking... more ABSTRACT In this study, the effects of selected intermingling process parameters on yarn breaking strength and elongation were predicted using artificial neural network. For this aim, partially oriented polyester yarn with 283 dtex linear density and three different numbers of filaments (34, 68, and 100) were used for producing interlaced yarn under different process parameters (speed and pressure). Yarns’ elongation and strength values measured with Uster Tensorapid test device and the number of filaments are input variables of the artificial neural networks. Feed forward neural network (FFNN) is used as the network structure. All FFNN computations were performed by MATLAB software package. The comparison results show that the FFNN has a better prediction performance than linear regression.
Nowadays electrical and electronic devices are widely used. It is known that the electromagnetic ... more Nowadays electrical and electronic devices are widely used. It is known that the electromagnetic waves emitted from electronic devices have negative effects on human health and environment. Reducing the damages caused by electromagnetic waves has become extremely important. Electrically conductive textile surfaces are used for shielding undesired electromagnetic waves. In the project, it is aimed to develop textile-based wallpaper in order to avoid the negative effects of electromagnetic waves.
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