Electromagnetic shielding and far infrared composite woven fabrics: Manufacturing technique and function evaluation

This study prepares and explores the properties of three types of woven fabrics that have electromagnetic shielding effectiveness (EMSE), far infrared (FIR) emissivity, or both (EMSE/FIR). The EMSE woven fabrics use stainless steel (SS) staple blended yarn and the FIR woven fabrics use FIR polyester filaments. The woven fabrics are made with various structures, densities, lamination layers, and warp/weft arrangements in order to yield the optimum EMSE and FIR emissivity. The experimental results show that an increase in SS content slightly increases the EMSE at the frequency range between 300 and 600 MHz, but does not significantly increase the EMSE at a high frequency of between 2000 and 2200 MHz. However, using SS staple blended yarn for both the warp and the weft significantly increases the EMSE by between −8 and −16 dB. The FIR emissivity increases as a result of an increasing amount of FIR polyester filament and reaches the optimum, 0.88.

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Processing techniques and properties of metal/polyester composite plain material: Electromagnetic shielding effectiveness and far-infrared emissivity

Journal of Industrial Textiles ◽

10.1177/1528083718783315 ◽

2018 ◽

Vol 49 (3) ◽

pp. 365-382 ◽

Cited By ~ 2

Author(s):

Jia-Horng Lin ◽

Ting An Lin ◽

Ting Ru Lin ◽

Jia-Ci Jhang ◽

Ching-Wen Lou

Keyword(s):

Stainless Steel ◽

Copper Wire ◽

Steel Wire ◽

Far Infrared ◽

Woven Fabrics ◽

Electromagnetic Shielding ◽

Double Layers ◽

Infrared Emissivity ◽

Shielding Effectiveness ◽

Electromagnetic Shielding Effectiveness

In this study, a composite plain material is composed of woven fabrics containing metal wire with shielding ability and polyester filament that can provide flexibility and far-infrared emissivity. Furthermore, a wrapping process is used to form metal/far-infrared–polyester wrapped yarns, which are then made into metal/far-infrared–polyester woven fabrics. The effects of using stainless steel wire, Cu (copper) wire, or Ni–Cu (nickel-coated copper) wire on the wrapped yarns and woven fabrics are examined in terms of tensile properties, electrical properties, and electromagnetic shielding effectiveness. Moreover, SS+Cu+Ni-Cu woven fabrics have maximum tensile strength, while SS+Ni-Cu woven fabrics have the maximum elongation and SS+Cu+Ni-Cu woven fabrics have the lowest surface resistivity. Stainless steel composite woven fabrics have far-infrared emissivity of 0.89 when they are composed of double layers. electromagnetic shielding effectiveness test results indicate that changing the number of lamination layers and lamination angle has a positive influence on electromagnetic shielding effectiveness of woven fabrics. In particular, SS+Cu+Ni-Cu woven fabrics exhibit electromagnetic shielding effectiveness of −50 dB at a frequency of 2000–3000 MHz when they are laminated with three layers at 90°.

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Multi-Functional Metallic/FIR-PET Wrapped Yarn and Woven Fabric: Electromagnetic Shielding Effectiveness, Mechanical and Electrical Properties

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.749.265 ◽

2015 ◽

Vol 749 ◽

pp. 265-269 ◽

Cited By ~ 1

Author(s):

Jia Horng Lin ◽

Ting An Lin ◽

Chien Teng Hsieh ◽

Jan Yi Lin ◽

Ching Wen Lou

Keyword(s):

Electrical Resistance ◽

Copper Wire ◽

Far Infrared ◽

Woven Fabrics ◽

Electromagnetic Shielding ◽

Surface Resistivity ◽

Woven Fabric ◽

Shielding Effectiveness ◽

Best Value ◽

Electromagnetic Shielding Effectiveness

This study uses 0.08mm copper wire and nickel-coated copper wire as the core and 75 D far infrared filament as the wrapped material to manufacture Cu/FIR-PET wrapped yarn, Ni-Cu/FIR-PET wrapped yarn and Ni-Cu/Cu/FIR-PET wrapped yarn. The three optimum metallic/FIR-PET wrapped yarns are then weaving into Cu/FIR-PET woven fabrics, Ni-Cu/FIR-PET woven fabrics and Ni-Cu/Cu/FIR-PET woven fabrics. Tensile property of metallic/FIR-PET wrapped yarns, electrical resistance of metallic/FIR-PET wrapped yarns, surface resistivity of metallic/FIR-PET woven fabrics and electromagnetic shielding effectiveness of metallic/FIR-PET woven fabric are discussed. According to the results, the optimum tenacity and elongation are chosen as 7 turns/ cm, electrical resistance of Ni-Cu/Cu/FIR-PET wrapped presents the best value, Cu/FIR-PET woven fabric has the lowest surface resistivity and Ni-Cu/Cu/FIR-PET woven fabric shows the best EMSE at 37.61 dB when the laminating-layer number is double layer and laminating at 90 ̊. In this study, three kinds of metallic/FIR-PET woven fabrics are successfully manufactured and looking forward to applying on industrial domains.

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Electromagnetic Shielding Effectiveness and Manufacture Technique of Functional Bamboo Charcoal/Metal Composite Woven

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.123-125.967 ◽

2010 ◽

Vol 123-125 ◽

pp. 967-970 ◽

Cited By ~ 6

Author(s):

An Pang Chen ◽

Chin Mei Lin ◽

Ching Wen Lin ◽

Chien Teng Hsieh ◽

Ching Wen Lou ◽

...

Keyword(s):

Far Infrared ◽

Woven Fabrics ◽

Electromagnetic Shielding ◽

Metal Composite ◽

Bamboo Charcoal ◽

Shielding Effectiveness ◽

Core Yarn ◽

Metal Wires ◽

Incident Waves ◽

Electromagnetic Shielding Effectiveness

In order to fabricate textiles with electromagnetic shielding effectiveness (EMSE) and far infrared emissivity, we fabricated bamboo charcoal/metal (BC/M) composite wrapped yarns with metal wires (stainless steel wires or copper wires) as the core yarn and bamboo charcoal textured yarn as the wrapped yarns using a rotor twister machine. The optimum manufacture parameters included: the speed of the rotor twister was 8000 rpm and the wrapped amounts of the BC/M composite wrapped yarns were 4 turns/cm. The BC/M composite wrapped yarns were made into the BC/M composite woven fabrics using a loom machine. Moreover, we tested the BC/M composite woven fabrics in EMSE and then changed the lamination angles. When the lamination amount was 6, laminated angles were 0°/45°/90°/-45°/0°/45°, 0°/ 90°/0°/ 90°/0°/ 90°, and the frequencies of the incident waves were between 1.83 and 3 GHz, the EMSE of the BC/M composite woven fabrics reached 50 to 60 dB which was satisfactory.

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The Influence of Fabric Structures of the Woven Fabrics on Electromagnetic Shielding Effectiveness

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.239-242.1994 ◽

2011 ◽

Vol 239-242 ◽

pp. 1994-1997 ◽

Cited By ~ 2

Author(s):

Ching Wen Lou ◽

Yi Chang Yang ◽

Chin Mei Lin ◽

Ching Wen Lin ◽

Lin Chao Chen ◽

...

Keyword(s):

Stainless Steel ◽

Electromagnetic Interference ◽

Woven Fabrics ◽

Electromagnetic Shielding ◽

Shielding Effectiveness ◽

Frequency Range ◽

Fabric Structures ◽

Electromagnetic Shielding Effectiveness

Stainless steel (SS) blended yarns with electromagnetic interference (EMI) were made into woven fabrics, after which the fabrics were evaluated with electromagnetic shielding effectiveness (EMSE). Parameters of laminated angle and the lamination number layers affected the fabrics’ EMSE differently. In addition, density of unidirectional SS yarns affected EMSE in frequency range of 200 to 500 MHz , so as the density of cross SS yarns on a frequency over 1000 MHz.

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Analyses on the Manufacture and Physical Properties of Electromagnetic Shielding/ Far Infrared Ray Nonwoven

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.97-101.1790 ◽

2010 ◽

Vol 97-101 ◽

pp. 1790-1793

Author(s):

Jia Horng Lin ◽

Yu Tien Huang ◽

Chin Mei Lin ◽

Yi Chang Yang ◽

Chien Teng Hsieh ◽

...

Keyword(s):

Physical Properties ◽

Far Infrared ◽

Electromagnetic Shielding ◽

Breaking Force ◽

Shielding Effectiveness ◽

Machine Direction ◽

Tear Strength ◽

Burst Strength ◽

Far Infrared Ray ◽

Electromagnetic Shielding Effectiveness

According to the results, when low melting polyester fiber increased to be 20%, the electromagnetic shielding/ far infrared ray nonwoven obtained the optimum burst strength, maximum breaking force and maximum tear strength, and they were as follows: burst strength was 4.2 kgf/cm2; maximum breaking force was 153.59 N in the cross machine direction and 70.80 N in the machine direction; maximum tear strength was 215.77 N in cross machine direction and 117.07 N in machine direction; and optimum electromagnetic shielding effectiveness (EMSE) was 45 dB.

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Electromagnetic Shielding Effectiveness of Woven Fabrics with High Electrical Conductivity: Complete Derivation and Verification of Analytical Model

Materials ◽

10.3390/ma11091657 ◽

2018 ◽

Vol 11 (9) ◽

pp. 1657 ◽

Cited By ~ 7

Author(s):

Marek Neruda ◽

Lukas Vojtech

Keyword(s):

Electrical Conductivity ◽

Analytical Model ◽

Electromagnetic Interference ◽

Woven Fabrics ◽

Electromagnetic Shielding ◽

High Electrical Conductivity ◽

Shielding Effectiveness ◽

Textile Composite ◽

A Value ◽

Electromagnetic Shielding Effectiveness

In this paper, electromagnetic shielding effectiveness of woven fabrics with high electrical conductivity is investigated. Electromagnetic interference-shielding woven-textile composite materials were developed from a highly electrically conductive blend of polyester and the coated yarns of Au on a polyamide base. A complete analytical model of the electromagnetic shielding effectiveness of the materials with apertures is derived in detail, including foil, material with one aperture, and material with multiple apertures (fabrics). The derived analytical model is compared for fabrics with measurement of real samples. The key finding of the research is that the presented analytical model expands the shielding theory and is valid for woven fabrics manufactured from mixed and coated yarns with a value of electrical conductivity equal to and/or higher than σ = 244 S/m and an excellent electromagnetic shielding effectiveness value of 25–50 dB at 0.03–1.5 GHz, which makes it a promising candidate for application in electromagnetic interference (EMI) shielding.

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Conductive textile structures and their contribution to electromagnetic shielding effectiveness

Industria Textila ◽

10.35530/it.071.05.1783 ◽

2020 ◽

Vol 71 (05) ◽

pp. 432-437

Author(s):

Ion Razvan Radulescu ◽

Lilioara Surdu ◽

Bogdana Mitu ◽

Cristian Morari ◽

Marian Costea ◽

...

Keyword(s):

Electromagnetic Compatibility ◽

Modern Technology ◽

Electromagnetic Shielding ◽

Shielding Effectiveness ◽

Frequency Range ◽

Conductive Coatings ◽

Tem Cell ◽

Conductive Yarns ◽

Conductive Textile ◽

Electromagnetic Shielding Effectiveness

Fabrics for electromagnetic shielding are especially relevant in nowadays context, contributing to human’s protection and wellbeing and to proper functioning of electronic equipment, in relation to electromagnetic compatibility. Fabrics with electromagnetic shielding properties employ two main technologies, namely insertion of conductive yarns and application of conductive coatings. Magnetron sputtering is a modern technology to enable conductive coatings with thickness in the range of nanometers onto fabrics. This paper aims to analyze contribution of various conductive textile structures out of both fabrics with inserted conductive yarns and coatings to Electromagnetic shielding effectiveness (EMSE). EMSE was measured in the frequency range of 0.1–1000 MHz by using a TEM cell according to standard ASTM ES-07. Results show a gain of 10–25 dB when introducing silver yarns in warp/ weft direction, a variation of 5–35 dB between conductive yarns out of silver and stainless steel and an up to 12 dB gain out of thin copper coating by magnetron plasma onto the fabrics with inserted conductive yarns

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Electromagnetic Shielding Effectiveness and Manufacturing Technique of Metal Complex Fabrics

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.496-500.472 ◽

2014 ◽

Vol 496-500 ◽

pp. 472-475

Author(s):

Ching Wen Lou ◽

An Pang Chen ◽

Ting An Lin ◽

Ya Yuan Chuang ◽

Jia Horng Lin

Keyword(s):

Metal Complex ◽

Life Time ◽

Woven Fabrics ◽

Electromagnetic Shielding ◽

Test Results ◽

Test Frequency ◽

Shielding Effectiveness ◽

Conductive Composite ◽

Composite Yarn ◽

Electromagnetic Shielding Effectiveness

In the research, The electromagnetic interferences (EMI) have drastically increased and can disrupt and reduce the life time and the efficiency of devices. Therefore, the electromagnetic shielding problem is become the important issue. In the research, Ni wire and Cu wire (Floodlit Enterprise Co., Ltd.) were used to make the Ni conductive composite yarn and Cu conductive composite yarn via an electrical covering machine. And the Cu conductive composite yarn was fabricated to the woven fabrics with the plain weaving. The test results revealed that the EMSE of the W/K/W complex fabrics have stable EMSE than the W/W/W complex fabrics when the laminated at the same direction. The W/90W/W complex woven fabrics were shown the best EMSE of 46.25 dB, which the test frequency is 1800 MHz.

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