The influence of fiber fineness on physical characteristics of staple polypropylene fibers spun at different pumping speeds

Abstract

Melt spinning and pump speed conditions are described for five samples of staple polypropylene PP fibers of different fineness. The influence of fiber fineness or denier on the physical characteristics of staple PP fibers spun at different pump speeds was studied. Optical anisotropy was measured using two-beam interference microscopy. Enthalpy and degree of crystallinity were measured using differential scanning calorimetry technique for studied fibers. The relation between the fiber diameter, crimp ratio, tenacity, and degree of orientation with the fiber denier are given. A selection of microinterferograms of fibers is given for illustration.

Microscopic investigation of the optical and morphological properties of iPP/TiO2 nanocomposite fibres using computed tomography technique

“…Many manufacturing techniques were developed in order to produce enhanced fibre structures. [6][7][8] Highspeed spinning from melt polymer is a common technique for producing generic isotactic polypropylene fibres. This technique usually produces iPP fibres of low molecular orientations, since stretching from the melt is followed by recovery of molecular chains.…”

“…In addition, orientated isotactic polypropylene is recommended for a wide range of industrial applications. Many manufacturing techniques were developed in order to produce enhanced fibre structures 6–8 . High‐speed spinning from melt polymer is a common technique for producing generic isotactic polypropylene fibres.…”

Investigation of the effects of filament fineness and disc type on yarn physical and mechanical properties of DTY polyester yarns

“…Bu değişimler iplik yapısı yanında, bu ipliklerden üretilen kumaşların da yapı ve performans özeliklerine etki etmektedir. Literatürde filament inceliğinin, iplik ve kumaş özelliklerine etkileri üzerine birçok çalışma mevcuttur [1]- [9]. Özkan çalışmasında filament sayısının, kesit şeklinin ve lineer yoğunluğunun POY ve tekstüre iplik özellikleri üzerinde etkisi olduğu sonucuna varmıştır [1].…”

“…Zarrebini ve diğ. farklı hızlarda üretilen polipropilen liflerin fiziksel özellikleri üzerinde lif inceliğinin etkisini araştırmışlardır [9]. Önceki çalışmalar incelendiğinde, tekstüre parametrelerinin iplik özellikleri üzerine etkilerinin incelendiği çalışmaların bulunduğu görülmektedir [10]- [13].…”