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Transforming Bale Twine into Useful Products with an Affordable Melting Machine: Closed-Loop for Recycling Plastics
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Researchers developed and tested an affordable melting machine to recycle agricultural bale twine plastic waste into new useful products in a closed-loop system, characterizing the physical, mechanical, and thermal properties of the reprocessed material to assess its viability as an alternative to landfill disposal that contributes to microplastic and chemical pollution.
The escalating use of plastic materials in agricultural practices has substantially increased the amount of plastic waste directed to landfills, leading to significant environmental and ecological challenges. Conventional disposal methods have been found to release hazardous pollutants, including microplastics and toxic chemicals, exacerbating these concerns. This study aims to address the environmental impact of agricultural plastic waste by exploring advanced reprocessing technologies and characterising the processed waste to assess its physical, mechanical and thermal properties. Synthetic polymer-based bale twine (BT) waste, commonly used in livestock farming, was processed using an economically viable melting machine developed by Ritchie Technology. The BT and processed bale twine (PBT) were analysed to understand their properties. Fourier transmission infrared spectroscopy revealed that the waste primarily consisted of polypropylene (PP). Thermal analysis indicated that the melting temperature of the PBT was 162.49 °C, similar to virgin PP. Additionally, tensile testing revealed that the PBT had a strength of 13.06 MPa and Young's modulus of 434.07 MPa. The PBT was further transformed into a bench that can be applicable in outdoor applications. Furthermore, PBT was extruded into 3D printable filament. Therefore, it is evident that bale twine waste can be given a second life through an economically viable technology.
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Transforming Bale Twine into Useful Products with an Affordable Melting Machine: Closed-Loop for Recycling Plastics
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