Üç Boyutlu (3B) Polipropilen Havlı Halıların Eğme ve Basma Yükü Altında Karakterizasyonu

Üç boyutlu dokuma halı yapılarının yapısında hav ipliği olarak polipropilen lifler kullanılmıştır. Geliştirilen polipropilen halıların özellikleri hem eğilme hem de basma yükü altında incelenmiştir. Kuru ve ıslak polipropilen havlı halıların eğilme rijitliği ve eğim eğrilerinin, atkı sıklığından kaynaklanan dolaylı etkilerle birlikte hav yüksekliği ve hav yoğunluğu gibi faktörlerden etkilendiği bulunmuştur. Ayrıca, geleneksel kumaş testinde kuru halıların ortalama eğilme rijitliği değerlerinin, ıslak halıların ortalama eğilme rijitliği değerlerine kıyasla 2.06 kat, teknik kumaş testinde ise 6.10 kat daha fazla olduğu görülmüştür. Farklı polipropilen halılardaki kalınlık kaybı (%) hav yoğunluğu ile orantılı bir ilişki göstermiştir. Hav yoğunluğunun artması ile birlikte polipropilen lif düğümlerinin de artması ve her bir polipropilen lif düğümünün taşıyabileceği basma yükü kapasitesinin değişmesinden dolayı halıların kalınlıklarında azalma olduğu görülmüştür. Bu durum, birim alanda daha seyrek düğüm bulunan halılara göre daha yoğun düğümlü halılarda daha belirgin olarak gözlenmiştir. Çalışmadan elde edilen bulguların, özellikle karmaşık eğimli parça imalatında polipropilen halı tasarımcıları için faydalı olabileceği düşünülmektedir.

Anahtar Kelimeler:

3B halı, Polipropilen lif, Eğilme, Statik yükleme, Hav yoğunluğu.

Characterizations of Polypropylene Pile Fiber in Three-Dimensional (3D) Carpet under Flexure and Static Loading

Polypropylene fiber was used as the pile yarn in the construction of three-dimensional woven carpet structures. The properties of the developed polypropylene carpets were investigated under both flexure and compression loading conditions. The flexure rigidity and curvature of dry and wet polypropylene pile fiber carpets were found to be influenced by factors such as pile height and pile density, with indirect effects observed on weft density. Furthermore, it was identified that the average dry bending rigidity of the carpet exceeded the average wet bending rigidity by a factor of 2.06 in the case of the apparel fabric test and 6.10 in the case of the technical fabric test. The thickness loss (%) in different polypropylene carpets exhibited a proportional relationship with the pile density. The thickness experienced a decrease with increasing pile density, primarily due to the enhanced compression load carrying capacity of each polypropylene fiber knot. This effect was more pronounced in carpets with denser knots compared to those with sparser knots per unit area. Finding from the study can be useful for the polypropylene carpet designers in particular complex curvature part manufacturing.

Keywords:

3D carpet, Polypropylene fiber, Bending, Static loading, Pile density.,

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