Preparation and Characterization of PET Coating Yarns Filled with Inorganic Particle/Polyurethane by Twin-screw Melt Compounder

This study investigates the use of inorganic fillers (CaCO3, ZnO, ZrO2, and TiO2) with thermoplastic polyurethane (TPU) as polyethylene terephthalate (PET) coating yarns to improve their mechanical properties. TPU is the most widely used coating material for thermal melting because of its excellent mechanical properties, functionality, and processability. The mechanical properties (e.g., tensile strength and tensile strain) and thermal properties of prepared TPU compounds were investigated with different inorganic filler contents. TPU resin was melt-mixed using a twin-screw extruder for uniform mixing by filler type and inorganic particle concetration. The core PET yarns were melt-coated without thermal decomposition at approximately 200 °C. The properties of the inorganic filler/TPU compound were analyzed by a universal testing machine, Fouriertransform infrared spectrometer, differential scanning calorimeter, and dynamic mechanical analysis. The dispersibility of inorganic fillers (ZnO and TiO2) in the TPUs was better than that of CaCO3 and ZrO2. The mechanical properties, thermal properties, and scanning electron microscopy images are ranked in the following order: TiO2 > ZnO > ZrO2 > CaCO3.

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Preparation and Characterization of PET Coating Yarns Filled with Inorganic Particle/Polyurethane by Twin-screw Melt Compounder

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