Effects of yarn constitutions and fabric specifications on electrical properties of hybrid woven fabrics

Cheng, K. B.; Cheng, Ta‐Wui; Lee, K.C.; Ueng, Tzuu-Hsing; Hsing, Wen Hao

doi:10.1016/s1359-835x(03)00178-7

Cited by 70 publications

(42 citation statements)

References 6 publications

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“…On the other hand, most of the authors 4,19,21,24,26,28,[31][32][33][34][35]38,40,41,[44][45][46][47][48][49]52 prefer to use the coaxial transmission line method specified in ASTM D4935-99 for the measurement of EMSE of conductive textiles. There is also one investigation 33 on the EMSE of conductive textiles that is carried out with both coaxial transmission line and dualcoaxial TEM Cell methods.…”

Section: Electromagnetic Shielding Effectiveness Of Textile Materialsmentioning

confidence: 99%

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: Electromagnetic Shielding Effectiveness Of Textile Materialsmentioning

confidence: 99%

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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show abstract

“…Conductivity is an effective parameter on the electromagnetic shielding effectiveness [32,[40][41][42][43]. Electrical resistivity measurements were conducted via 4 point-probe system [52] as seen in Figure 5 and the outcomes of electrical resistance and resistivity measurements are depicted in Table 7.…”

Section: Emse Performances Of the Vgcnfs/pvdf Nanocompositesmentioning

confidence: 99%

Analyses of the mechanical, electrical and electromagnetic shielding properties of thermoplastic composites doped with conductive nanofillers

Yılmaz

Özen

Sancak

et al. 2018

Journal of Composite Materials

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The purpose of this study is to observe effect of incorporating vapor grown carbon nanofibers with various amounts in polyvinylidene fluoride matrix in terms of mechanical strength and electromagnetic shielding effectiveness. Thermoplastic conductive nanocomposites were prepared by heat pressed compression molding. Vapor grown carbon nanofibers were utilized at various weight ratios (1 wt. %, 3 wt. %, 5 wt. % and 8 wt. %) as conductive and reinforcing materials. Polyvinylidene fluoride was used as a thermoplastic polymer matrix. SEM analysis was conducted in order to characterize the morphology and structural properties of the nanocomposites and results revealed well dispersion of carbon nanofibers within the matrix for all concentrations. Mechanical characteristics were investigated according to standards. Findings proved that overall increments of 16%, 37,5% and 56% were achieved in terms of tensile strength, elasticity modulus and impact energy, *: Corresponding author E-mail: acyilmaz@cu.edu.tr 1 respectively where a total reduction of 44.8% was observed in terms of elongation for 8 wt.% vapor grown nanofiber matrix compared to that of 0 wt.%. Electromagnetic shielding effectivenesses of the nanocomposites were determined by standard protocol using coaxial transmission line measurement technique in the frequency range of 15-3000 MHz. It was observed that resistance, sheet resistance and resistivity of nanocomposites depicted substantial reduction with the increment of nanofiber content. Nevertheless, it was observed that nanofiber content, dispersion and network formation within the composites were highly influent on the electromagnetic shielding effectiveness performance of the structures.

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“…Metal composite fabrics prepared with various types of metal composite yarn using SS yarn (bekinox, 70 denier, dia 0.035 mm, density 8 g/cc, 735 Ω/m) and copper wire (dia 0.040 mm, density 8.9 g/cc, 13.37 Ω/m), offered maximum EMSE of 30-40 dB in 30 MHz-1.5 GHz. [26][27][28] Researchers also investigated the EMI shielding effectiveness of the woven/knitted fabrics containing metallic fibrous yarn (containing SS fibre). These fabrics are stronger, flexible and more EMI shielding effectiveness than fabric containing metallic wire system.…”

Section: Journal Of Electromagnetic Waves and Applications 1455mentioning

confidence: 99%

Ultra-lightweight hybrid woven fabric containing stainless steel/polyester composite yarn for total EMI shielding in frequency range 8–18 GHz

Gupta

Abbas

Abhyankar

2015

Journal of Electromagnetic Waves and Applications

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Effects of yarn constitutions and fabric specifications on electrical properties of hybrid woven fabrics

Cited by 70 publications

References 6 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

Analyses of the mechanical, electrical and electromagnetic shielding properties of thermoplastic composites doped with conductive nanofillers

Ultra-lightweight hybrid woven fabric containing stainless steel/polyester composite yarn for total EMI shielding in frequency range 8–18 GHz

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