In this work the tensile properties and structural characteristics of polypropylene filaments, produced by melt spinning from two different polymers; polymer with the low melt flow index (a plastic grade polymer used for production of cast and injected products) and polymer with the high melt flow index (a fibre grade polymer used for production of textile fibres) are presented. The goal of our research was to optimize the melt spinning of filaments spun from the plastic-grade polymer (recycled polymer).
COBISS.SI-ID: 342009
In our research the use of 100% recycled polypropylene from separately colected packaging waste for manufacturing of monofilaments was studied. Monofilaments were spun from the virgin polymer, from the blends of 85%/15% and 50%/50% virgin/recycled polymer. It was established that with adding the recycled polymer to the virgin polymer, the crystallinity and average molecular orientation were lowered, which influenced the tensile properties of monofilaments. As-spun monofilaments produced from blends are porous, brittle, rigid and have high tendency to break.