EMR (Elektromanyetik Radyasyon) KORUMA AMAÇLI BİKOMPONENT POLİESTER LİF ÜRETİMİ VE EMR KALKANLAMA ÖZELLİĞİNİN İNCELENMESİ

Year 2015, Volume: 25 Issue: 2, 140 - 147, 01.12.2015

Semiha Eren Yusuf Ulcay

Abstract

Bu çalışmada elektromanyetik radyasyondan korunma amaçlı multifilament S/C (sheath/ core) katkılı bikomponent poliester iplik üretimi gerçekleştirilmiştir. İplikler 260 dtex 72 filament olarak elde edilmiştir. Katkı malzemesi öncelikle taşıyıcı malzeme olarak PBT kullanılarak %20 nano demiroksit ile masterbatch şeklinde hazırlanmıştır. Bikomponent lifin merkezinde katkı malzemesi olarak % 20’liknanodemiroksit/ PBT masterbatch%1 oranında kullanılmıştır. %2 ve %3 oranları da denenmiş fakat akıştaki bozukluk ve kopukluklardan dolayı üretim yapılamamıştır. Üretilen ipliklere kaynama çekmesi ve mukavemet testleri yapılmıştır. Elde edilen ipliklerle iki farklı sıklıkta örme kumaş üretilmiştir. Üretilen kumaşların EMR koruma etkinliği araştırılmış30 MHz’ de % 1 demiroksit katkılı kumaşın ekranlama etkinliği daha sık olan kumaşta 18,78 dB iken, daha seyrek kumaşta 13,59 olarak ölçülmüştür

Keywords

Elektromanyetik radyasyon koruma, poliester, bikomponent lif

PRODUCTION OF BI-COMPONENT POLYESTER FIBRES FOR EMR (ELECTROMAGNETIC RADIATION) PROTECTION AND EXAMINING EMR SHIELDING CHARACTERISTICS

Abstract

In this study, multifilament polyester yarns consist of bicomponent S/C (sheath/ core) fibres were produced in order to create electromagnetic shielding properties. Yarns were produced in 260 dtex linear density with 72 bicomponent filaments. The conductive additive material was nano iron oxide 20% (w/w) in PBT (polybutylene terephthalate) masterbatch.1, 2 and 3% masterbatch (20% nano iron oxide in PBT) were fed into the sample yarn production device, however; acceptable yarn production could only be achieved by 1% masterbatch due to the high number of machine stops at higher amounts of additive material. Shrinkage at the boil and tenacity tests were performed on the produced yarns. Also, the produced yarns were knit to form fabrics and test the EMSE (electromagnetic shielding efficiency) values by these knitted surfaces. The EMSE tests on the knitted fabric samples were performed basically according to ASTM D 4935 Coaxial Holder Method but the method used was a modified method that uses a smaller sample holder. The EMSE values at 30 MHz of the fabric samples knitted by the produced bicomponent yarns were measured as 18,78 dB and 13,59 dB for tight and loose stitch densities, respectively

Keywords

Electromagnetic radiation (EMR) shielding, polyester, bicomponent fibres

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