Effects of Weft Count and Weft Density on Yarn Crimp% of Unbleached And Bleached 3/1(S) Twill Woven Fabrics

Öz

In this study, the effects of weft yarn count and weft density on crimp% of unbleached and bleached 3/1(S) twill woven fabrics are investigated. The warp yarn properties (type, count and warp density) were kept constant while the effect of variation in weft count and weft density were studied. Crimp% of unbleached and bleached fabrics are calculated by dividing the difference between straightened yarn length and the distance between the ends of the yarn while in the fabric, by the distance between the ends of the yarn while in the fabric as percentage. It is observed that the crimp% of warp and weft yarn in woven fabric is effected by weft count and weft density statistically. Moreover weft and warp crimp% of bleached fabrics have higher values than unbleached fabrics as a result of the change in weft densities after bleaching process. 

Anahtar Kelimeler

• Crimp,weft yarn,weft density,3/1 twill weave,woven fabric geometry

Atkı İplik Numarası ve Atkı Sıklığının Ham ve Ağartılmış Dimi 3/1(S) Dokuma Kumaşlarda İplik Kıvrımına Etkisi

Öz

Bu çalışmada, dimi 3/1 (S) örgü yapısındaki ham ve ağartılmış dokuma kumaşlarda atkı iplik numarası ve atkı sıklığının kıvrım üzerindeki etkisi araştırılmıştır. Çözgü iplik özelliklerini değiştirmemek kaydıyla (tip, iplik numarası ve çözgü sıklığı), atkı iplik numarası ve atkı sıklığını değiştirmek suretiyle kumaş üretimi gerçekleştirilmiştir. Kıvrım yüzdesi, dokuma makinesi çıkışında ham ve ağartılmış kumaşlarda, kumaştan çıkarılarak ölçülen kıvrımsız gerçek iplik uzunluğu ile kumaş yapısındaki iplik uzunluğu arasındaki farkın, kumaş yapısındaki iplik uzunluğuna yüzdesel oranı olarak hesaplanmıştır. Atkı iplik numarası ve atkı sıklığının, dokuma kumaştaki çözgü ve atkı iplik kıvrımı üzerinde istatistiksel olarak anlamlı etkisinin olduğu gözlenmiştir. Ayrıca, ağartma işleminden sonra atkı sıklıklarında meydana gelen değişikliğin bir sonucu olarak, ağartılmış kumaşların atkı ve çözgü kıvrım yüzdelerinin ağartılmamış kumaşlardan daha yüksek değerlere sahip olduğu görülmüştür. 

Anahtar Kelimeler

• Kıvrım,atkı ipliği,atkı sıklığı,dimi 3/1 örgü,dokuma kumaş geometrisi

Kaynakça

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