Experimental Studies on the Dielectric Behaviour of Polyester Woven Fabrics

Abstract

In this paper, the influence of fabric structure, weft density, end spacing and yarn fineness on the dielectric constant of polyester woven fabrics was studied. The results show that at low frequencies, the dielectric constant of fabric was clearly affected by the processing parameters; when the organisation of the fabric is plain i.e. the warp density is 140/10 cm, weft density 140/10 cm and yarn linear density 32 tex, the absorbing performance of polyester woven fabrics is at its best. At higher frequencies, the effect of the varying parameters on the dielectric constant of the fabrics can be neglected. Polyester woven fabrics have better EM absorbing properties for these parameters. This study offers a new theoretical basis for the development of EM absorptive fabrics.

The influence of two types of functional particles on the electromagnetic properties and mechanical properties of double-layer coated basalt fiber fabrics

“…The real part is on behalf of the polarization degree of materials under the action of an applied electric field, and the larger its value, the stronger the polarization ability of materials. 29 As shown in Figure 3, within the frequency range of 0–1500 MHz, with the increasing frequencies of electromagnetic waves, values of the real part of the two groups of samples showed a declining trend; after 0.5 GHz, the value of the real part tended to be stable. Within the frequency range of 0–1500 MHz, the value of the real part of sample 2 was greater than that of sample 1; namely, the polarizing ability of the double-layer coated basalt fiber fabric with the graphene coating was stronger than that of the double-layer coated basalt fiber fabric with the graphite coating.…”

Pengaruh konstruksi kerapatan benang kain tenun kapas 100% (kain kanvas) terhadap konstanta dielektrik dan profil tegangan pengisian & pengosongan pada perangkat kapasitor plat sejajar

“…Studi mengenai penerapan bahan tekstil sebagai material dielektrik telah diamati oleh berbagai peneliti. Berbagai tujuan telah dilakukan untuk mengamati tentang sifat dielektrik bahan tekstil, diantaranya untuk aplikasi pengukuran nilai konstanta dielektrik bahan selulosa [1,2], bahan sintetis [3,4] dan protein [5]. Dalam beberapa tahun terakhir, studi mengenai implementasi bahan tekstil dalam sistem elektronik (textronics) telah berkembang pesat [6,7].…”

“…Selain itu, konstanta dielektrik bahan tekstil yang terbuat dari bahan monofilament nilon-6 memiliki hubungan kurva kuadrat dengan fraksi volume material [3]. Sebaliknya, Liu dan Zhao (2016) menemukan bahwa tidak ada efek signifikan dari spesifikasi khas kain tenun poliester pada perilaku dielektrik pada frekuensi dari 100 kHz hingga 10 MHz [4].…”