Cukurova University,Department of Textile Engineering, Main Branch of Textile Technology

October 16, 2019

The effects of metal type, number of layers, and hybrid yarn placement on the absorption and reflection properties in electromagnetic shielding of woven fabrics

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 onemetal 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.

Source: Journal of Engineered Fibers and Fabrics
Publisher: Association of the Nonwoven Fabrics Industry
Original Language: English
Document type: Article / Open Access



Cited by 12 documents except author up to this time :

Web of Science
1. Akman, F., Ogul, H., Ozkan, I., Kaçal, M. R., Agar, O., Polat, H., & Dilsiz, K. (2022). Study on gamma radiation attenuation and non-ionizing shielding effectiveness of niobium-reinforced novel polymer composite. Nuclear Engineering and Technology, 54(1), 283-292. 

2. Šaravanja, B., Kovačević, S., Pušić, T., Malarić, K., & Ujević, D. (2022). Impact of Dry and Wet Cleaning on Structural, Mechanical and Protective Properties of Fabrics Designed for Electromagnetic Shield Application. Fibers and Polymers, 23(3), 666-679. 

3. Akman, F., Ozkan, I., Kaçal, M. R., Polat, H., Issa, S. A., Tekin, H. O., & Agar, O. (2021). Shielding features, to non-ionizing and ionizing photons, of FeCr-based composites. Applied Radiation and Isotopes, 167, 109470. 

4. Zhang, H., Chen, J., Ji, H., Wang, N., Feng, S., & Xiao, H. (2021). Electromagnetic interference shielding with absorption-dominant performance of Ti3C2TX MXene/non-woven laminated fabrics. Textile Research Journal, 91(21-22), 2448-2458. 

5. You, J. L., Chen, Y. S., Chang, C. P., Wu, M. Z., & Ger, M. D. (2021). Utilizing a pH-responsive palladium nanocomposite to fabricate adhesion-enhanced and highly reliable copper coating on nylon 6 fabrics. Journal of Materials Research and Technology, 15, 3983-3994. 

6. Lou, C. W., Liu, Y. L., Shiu, B. C., Peng, H. K., & Lin, J. H. (2021). Preparation and evaluation of polyester-cotton/wire blended conductive woven fabrics for electromagnetic shielding. Journal of Industrial Textiles, 1528083721997184. 

7. Özkan, İ.(2020). Investigation on the electromagnetic shielding performance of copper plate and copper composite fabrics: A comparative study. Tekstil ve Konfeksiyon, 30(2), 156-162. 

8. Tunakova, V., Tunak, M., Bajzik, V., Ocheretna, L., Arabuli, S., Kyzymchuk, O., & Vlasenko, V. (2020). Hybrid knitted fabric for electromagnetic radiation shielding. Journal of Engineered Fibers and Fabrics, 15, 1-9 

9. İlkan, Ö. (2020). Investigation of the technical and physical properties of metal composite 1× 1 rib knitted fabrics. Industria Textila, 71(1), 41-49. 

10. Liu, X., Yan, X., Su, X., & Song, J. (2020). Study on properties of electromagnetic shielding yarns and fabrics. International Journal of Clothing Science and Technology. 32 (5) , pp.677-690. 

11. Özkan, İ. (2019). Investigation on antimicrobial activity and electromagnetic shielding effectiveness of metal composite single jersey fabrics. Journal of Engineered Fibers and Fabrics, 14, 1558925019895984.

TR Dizin

1. Garip, B., Yüksel, A., Necati, E. R., & Bedeloğlu, A. (2021). Farklı Punta Sayılarının Poliester Kumaş Özellikleri Üzerindeki Etkilerinin İncelenmesi. Konya Mühendislik Bilimleri Dergisi, 9(1), 25-35.
Last Updated: 24.06.2022


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October 15, 2019

An Image Processing Research Consistent with Standard Photographs to Determine Pilling Grade of Woven Fabrics

Objective results corresponding to each parameter were analyzed comparatively with these subjective results. 

The developed method was successful by using mean of matrix elements from textural parameters and total area from pill characteristics.
 
In this study, MATLAB 2018a software was used to evaluate pilling grade of woven fabrics objectively.

Experimental works were carried out on the EMPA W3 standard photographs and accordingly two woven fabrics.

Equations were built based on the measurements of pill characteristics and textural parameters of these photographs with the help of curve fitting method after image processing steps.

Intervals were generated for each fabric by using slope of these equations and quantitative parameters obtained from the original fabric.

Furthermore, fabrics that were provided pilling formation at different test turns were evaluated subjectively by expert operators. 

Source: Tekstil ve Konfeksiyon
Publisher: Ege University Textile and Apparel Research & Application Center
Original Language: English
Document type: Article / Open Access


Cited by 4 documents except author up to this time :

1. Büyükkoru, B., & Kara, A. (2022). Investigation of the pilling properties of polyvinyl phosphonic acid treated fabrics. Journal of the Faculty of Engineering and Architecture of Gazi University, 37(2), 697-709. 

2. Büyükkoru, B., & Kara, A. (2021). Synthesis and Characterization of Polyvinylimidazole and Investigation of its Antipilling Effect on Different Fabrics. Tekstil ve Konfeksiyon, 31(4), 274-283. 

3. Wu, J., Wang, L., Xiao, Z., Geng, L., Zhang, F., & Liu, Y. (2021). Wool knitted fabric pilling objective evaluation based on double-branch convolutional neural network. The Journal of The Textile Institute, 112(7), 1037-1045. 

4. Mendes, A. D. O., Fiadeiro, P. T., Miguel, R. A., Lucas, J. M., & Silva, M. J. D. S. (2021). Optical 3D-system for fabric pilling assessment: A complementary tool to avoid evaluation errors. The Journal of The Textile Institute, 112(6), 921-927.

Last Updated: 24.06.2022


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May 30, 2019

Properties of Yarns Obtained by Combining FDY with POY, CDPET and Micro POY Polyester Filaments Under Different Texturing Conditions and Their Visual Effects in Knitted Fabric

In recent years, combination of filament yarns in continuous yarn production are used for innovative product development studies.

In this study, POY and FDY polyester filaments having different structures and specifications were combined using nip-twisters by false-twist texturing method.

Twelve different yarns were obtained by using constant FDY and three different POY materials with the state of FDY in first heater and two different drawing values.

Linear density, breaking force, breaking elongation, shrinkage in boiling water and number of nips were measured in these yarns.

Furthermore, the visual effects in knitting fabrics produced from texturized yarns were investigated.

It was observed that the produced combined yarns have different structural and visual effects compared to single textured yarn.

Source: Journal of Science and Engineering
Publisher: Dokuz Eylül University Faculty of Engineering
Original Language: Turkish
Document type: Article / Open Access


Cited by 1 documents except author up to this time :

1. Garip, B., Yılmaz, A. N. Y., Necati, E. R., & Bedeloğlu, A. Farklı Punta Sayılarının Poliester Kumaş Özellikleri Üzerindeki Etkilerinin İncelenmesi. Konya Mühendislik Bilimleri Dergisi, 9(1), 25-35.
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Objective Measurement of Pilling Resistance in Knitted Fabrics with Image Processing Techniques

In the textile industry, measurement techniques based on image processing principles prepare to take over subjective evalution.

In this study, MATLAB software was used to evaluate pilling of knitted fabrics as objective. Knitted fabric images were taken in the cycles of 1000, 2000, 3000, 5000 and 7000.

Fabric’s surface digitization, pills detection and segmentation were carried out from these images.

Texture analysis was performed with Gray Level Co-occurrence Matrix (GLCM). After this phase, pill quantizations were made using images in matrix format obtained from image processing studies.

Standart deviation, entropy and mean of matrix elements, pill count, pill area and contrast values increased with the increase of rubbing cycles applied on the fabric.

Furthermore, the increase of rubbing cycles caused decrease in energy and homogeneity.

Source: Journal of Textiles and Engineer
Publisher: Chamber of Textile Engineering
Original Language: Turkish
Document type: Article / Open Access



Cited by 1 documents except author up to this time :

1. Kaynar Taşcı, Z., & Çelik, N. (2021). The Effect of Using Silver Fiber Content Yarns in Shirting Fabrics on Abrasion Resistance and Pilling Properties. Journal of Natural Fibers, 1-9.
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