Electromagnetic Shielding Effectiveness of Copper/Stainless Steel/Polyamide Fiber Co-Woven-Knitted Fabric Reinforced Polypropylene Composites

Abstract

Copper wire and polyamide filament were used as the core yarn, and stainless steel wire was used as the wrapping yarn to fabricate the loop yarns for knitting structure. The nonwoven selvedge served as the core yarn, and the conducting wire was used as the wrapping yarn, to fabricate the weft-inlaid yarn. The rotor twister successfully fabricated a series of conductive hybrid yarns (CHYs). The co-woven-knitted machine successfully fabricated the conductive co-woven-knitted fabrics (CWKFs) with various CHYs. The conducting materials of the hybrid yarn were copper wire and stainless steel wire, taken as the wrapping and core yarn, respectively. The conductive co-wovenknitted fabrics were laminated with various angles in four and six layers and then heat pressed to 2 and 3 mm in thickness. This study investigated the surface resistivity, electromagnetic shielding effectiveness (EMSE) and electrostatic discharge (ESD) attenuation percentage of the co-wovenknitted fabrics and CWKFs reinforced composites.

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

“…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.…”

Characterization of the tensile behaviour of a co-woven-knitted composite in the continuous and discrete frequency domain

“…The CWK structure has all the advantages of the woven and knitted structures at the same time including good structural stability of the woven structure, as well as excellent extensibility and high deformation of the knitted structure. However, little research has been done on the structure and mechanical behaviour of the CWK composite [1][2][3][4][5].…”

Puncture-resisting, sound-absorbing and thermal-insulating properties of polypropylene-selvages reinforced composite nonwovens

“…If these abandoned sources are utilized properly, it would bring about additional values and meanwhile achieve the source recovery. In recent years, PP spunce nonwoven selvages were wrapped with metal fibers forming functional yarns or weaving into functional fabrics [3][4][5][6][7][8] or needle-punched with other nonwovens to improve strength [9][10][11][12] or sound absorption [13]. This study aims to compound PP nonwoven selvage with nonwoven fabrics to improve puncture resistance, sound absorbing and thermal insulating properties for use as industrial wall covering in the future.…”