Serpil Koral KOÇ, Aslı Şengönül HOCKENBERGER

Investigation of air-jet texturing of technical polyester yarns

Bu çalışmada teknik polyester ipliklerin, kopma mukavemetlerinde önemli bir azalmaya yol açmadan hava-jetli tekstüre edilmeleri incelenmiştir. Çalışmada kullanılan aşırı besleme oranları iplik mukavemeti için gerekli olan liflerin paralel konumlanmalarını korumak için düşük tutulmuştur. Liflerin yüzeyleri elektron tarama mikroskobu (SEM) çalışmaları ile incelenmiştir. Sonuçlar hava-jetli tekstüre sonucunda daha pürüzlü yüzeylerin elde edildiğini göstermektedir. Optik mikroskop çalışmaları iplik yapısının anlaşılması için kullanılmıştır. Aşırı besleme oranındaki artış yüzeyde daha ilmekli bir yapının elde edilmesine yol açmaktadır. Ayrıca liflerin esneklik rijitlikleri hesaplanmış ve yüksek esneklik rijitliğine sahip olan liflerin açık ilmek, düşük esneklik rijitliğine sahip olanların ise kapalı ilmek oluşturduğu sonucuna varılmıştır.

Teknik poliester ipliklerin hava-jetli tekstüre işlemlerinin incelenmesi

This paper reports an investigation of air-jet texturing of technical polyester yarns without causing important decrease in their breaking strength. The overfeed levels are kept low in order to maintain the parallel fiber alignment which is essential to maintain the yarn strength. Surface of the fibers are analyzed by scanning electron microscopy (SEM) studies. Results show rougher surfaces after air-jet texturing. Optical microscopy is used to study the yarn structure. An increased overfeed level results in more loops on the surface. Furthermore, flexural rigidity of the fibers is calculated and it is concluded that fibers with high flexural rigidities give open loop structure, whereas the fibers with low flexural rigidities result in closed loops.

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