Bending and tensile properties of cotton/metal wire complex yarns produced for electromagnetic shielding and conductivity applications

Bedeloğlu, Ayşe Çelik; Sunter, Nilsen; Yıldırım, Bekir; Bozkurt, Yalçın

doi:10.1080/00405000.2012.677568

Cited by 30 publications

(22 citation statements)

References 19 publications

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“…22 that with the increase in diameter, the bending of copper thread becomes more difficult, resulting in openness in the knitted fabric structure, thereby providing less shielding effectiveness as compared to the other samples. Also, Bedeloglu et al 68 demonstrated the increase of bending rigidity with metal wire diameter with an experimental study.…”

Section: Emse Test Results Of Free Space Measurement Techniquementioning

confidence: 97%

Comparison of electromagnetic shielding effectiveness of conductive single jersey fabrics with coaxial transmission line and free space measurement techniques

Tezel

Kavuşturan

Vandenbosch

et al. 2013

Textile Research Journal

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The aim of this study is to investigate the electromagnetic shielding effectiveness (EMSE) of thin and lightweight knitted fabrics that are suitable for casual wear like t-shirts. For the purpose of having a low production cost, metal/cotton conductive composite yarns are produced by a yarn doubling technique, involving stainless steel wires (35 m, 50 m) or copper wires (50 m, 70 m) and Ne30/1, Ne40/1, Ne60/2, Ne80/2 count cotton yarns. Single jersey fabrics are knitted on an E20 circular knitting machine with the same machine settings. Coaxial transmission line and free space measurement (by using an anechoic chamber) techniques are used for the EMSE measurements in the frequency range of 100 MHz-1.5 GHz and 1 GHz-18 GHz respectively. The free space measurement technique test results reveal that single jersey knitted fabrics have EMSE ability for the electric field polarization in the same direction as the main direction of the conductive metal wires in the fabric. It is observed that all single jersey fabric structures have more than 7 dB (80% or better) EMSE for GSM-850 and GSM-900 cellular phone communication bands according to coaxial transmission line equipment test results. SNK test results of both test methods reveal that, while 100% cotton fabrics do not have EMSE ability, cotton yarn count is highly significant on the EMSE of single jersey fabrics with conductive composite yarns. Fabrics with two-ply fine cotton yarns (Ne60/2 and Ne80/2) have higher EMSE values than the fabrics with one-ply cotton yarn of the same yarn count (Ne30/1 and Ne40/1).

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Section: Emse Test Results Of Free Space Measurement Techniquementioning

confidence: 97%

Comparison of electromagnetic shielding effectiveness of conductive single jersey fabrics with coaxial transmission line and free space measurement techniques

Tezel

Kavuşturan

Vandenbosch

et al. 2013

Textile Research Journal

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“…Currently, there are only few literature references related to magnetic staple yarns produced from natural fibers (Bedeloglu et al, 2012;Rubacha & Zięba, 2006;Zięba, 2007). Therefore, in this paper we present a method for obtaining magnetic yarns by direct coating *Corresponding author.…”

Section: Introductionmentioning

confidence: 97%

“…Moreover, medical research has increasingly raised concerns about the role of EMI in cancer, leukemia, and other diseases. Consequently, several solutions for EMI shielding were proposed such as metallic shields (Bedeloglu, Sunter, Yildirim, & Bozkurt, 2012;Bedeloglu, 2013;Bogush, 2005), ferrite absorbers (Akşit et al, 2009;Grosu, Hossu, Avram, & Agop, 2011;Jiang, Ai, & Li, 2009), ferroelectric materials (Lim, Kim, Lee, & Park, 2003), and conductive polymers (Ceken, Pamuk, Kayacan, Ozkurt, & Ugurlu, 2012). However, since the shielding efficiency changes with frequency, no material is ideal for shielding the whole range of radio waves or microwaves and various composite textile materials suitable for a specific range of frequencies were developed.…”

Section: Introductionmentioning

confidence: 98%

Magnetic cotton yarns – optimization of magnetic properties

Grosu

Lupu

Cramariuc

et al. 2015

The Journal of The Textile Institute

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In this paper, we present the effect of ferrite percentage content and electric current intensity passing through the electromagnet coil on magnetic properties (saturation induction, residual induction, and coercive field) of magnetic staple yarns. Also, we present a method for obtaining magnetic yarns by direct coating with magnetic powder (barium ferrite). The aim of the study is to determine the optimal processing factors that can affect the performance of magnetic characteristics using an experimental design for second-order model. The results show that an increase in ferrite percentage content is influencing the saturation and residual induction more than an increase in applied current intensity. The increase in saturation and residual induction is due to the higher content of ferrite powder from the magnetic solution that adheres on the yarn surface. The higher is the value of coercive field, the larger is the force needed to completely demagnetize the magnetic yarn.

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“…Perumalraj, Dasaradan, Anbarasu, Arokiaraj, and Harish (2009) produced Cu core yarns to make woven fabric, which provides attenuation of 20-66 dB at the medium frequency range of 200-4000 MHz. Bedeloglu, Sunter, Yildirim, and Bozkurt (2012) developed a novel complex yarn with Cu and SS. They studied yarn count, hairiness, yarn bending rigidity and tensile properties of the complex yarn.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic shielding effectiveness and mathematical model of stainless steel composite fabric

Cheng

Zhang

Guo

et al. 2014

The Journal of The Textile Institute

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In this paper, a kind of novel filaments/short fibers composite yarns containing stainless steel (SS) were produced by an innovative ring-spinning method. On the basis of the shielding mechanism of the electromagnetic (EM) shielding material, a method for fabricating a multifunctional SS composite fabric with EM shielding characteristics was successfully developed. Coaxial transmission line method was used to investigate the influences of different factors, such as radiant frequency, metal content, metal mesh size, and geometry, on electromagnetic shielding effectiveness (EMSE) of the composite fabrics in the frequency range of 15-3000 MHz. The notabilities of these factors were examined using analysis of variance (ANOVA). A regression model equation was setup using the above factors as variables, and verification of accuracy and practicability to this model was also carried out. The experimental results indicate that average EMSE of composite fabrics is 20.76-51.92 dB in the frequency of 15-3000 MHz, which indicates that the influence of the studied factors was considerable.

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Bending and tensile properties of cotton/metal wire complex yarns produced for electromagnetic shielding and conductivity applications

Cited by 30 publications

References 19 publications

Comparison of electromagnetic shielding effectiveness of conductive single jersey fabrics with coaxial transmission line and free space measurement techniques

Comparison of electromagnetic shielding effectiveness of conductive single jersey fabrics with coaxial transmission line and free space measurement techniques

Magnetic cotton yarns – optimization of magnetic properties

Electromagnetic shielding effectiveness and mathematical model of stainless steel composite fabric

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