Investigation of Effect of Roller Setting on Yarn Quality Properties in Draw Frame
In the scope of the study, it was aimed to determine the effect of the variation of the roller setting on the selected yarn properties in the first and second passage draw frame stages. For this purpose, two different draft distances were chosen for both passages and draw frame strip was produced. Then, these strips were made into yarn with constant production parameters. The hairiness, unevenness and strength properties of the yarns were tested with standard method. As a result, it was observed that increasing the draft distance affects negatively the selected three yarn properties. In this case, it has been determined that the shorter draft distance has more positive results in terms of yarn quality parameters for Şanlıurfa GAP cotton selected as the sample in the study.
Cer Makinasında Ekartman Ayarlarının İplik Kalite Özelliklerine Etkisinin İncelenmesi
Calisma kapsaminda, birinci ve ikinci cer pasaji asamalarinda cer makinasi ekartman ayarlarindaki degisimin secilmis iplik ozelliklerine etkisinin belirlenmesi amaclanmistir. Bu amacla her iki pasaj icin iki farkli ekartman mesafesi ayari secilerek cer seridi uretimi gerceklestirilmis ve bu seritler sabit uretim parametreleriyle iplik haline getirilmistir. Ardindan ipliklerin tuyluluk, duzgunsuzluk ve mukavemet degerleri test edilmis ve ekartman mesafesindeki artisin uc iplik ozelligini de olumsuz etkiledigi gorulmustur. Bu durumda calismada numune olarak secilen Şanliurfa GAP pamugu icin daha kisa ekartman mesafesinin iplik kalite parametreleri acisindan daha olumlu sonuclar dogurdugu belirlenmistir.
A Study of the Hairiness of Cotton Yarns Part I: Effect of Fiber and Yarn Factors
A combmation of singeing and microscopic techniques has been adopted in the present study to get an insight into the length, nature, and distribution of protruding fibers causing hairmess in yarns. Alter examining various indices, a stutable method of expressing hairmess as the loss in weight on singeing per unit weight of varn has been adopted. Relationships between yarn hairmess and various fiber properties have been investigated in detail, and the factors that influence the preferential protrusion of fiber ends towards the yarn surface are studied by a tracer fiber technique. The results indicate that torsional and flexural rigidity. fiber length, and fineness of cottons are significantly correlated with yarn hairmess. Further, the length of protruding fiber ends and loops is mfluenced not only by the fiber properties of the cottons used but also by processing techniques and factois of varn geometry.