이축압출을 활용한 무기입자 폴리우레탄 용융혼련 PET 코팅사 제조 연구 = Preparation and Characterization of PET Coating Yarns Filled with Inorganic Particle/Polyurethane by Twin-screw Melt Compounder

다국어 초록 (Multilingual Abstract)

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

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