A Study and Comparison of Plastic Waste Recycling into Plant Pots Using a Hot Air Oven Process.
Keywords:
ขยะพลาสติก, การรีไซเคิล, กระถางต้นไม้, HDPE, PPAbstract
This research aimed to investigate the appropriate material quantity and processing time for converting plastic waste into plant pots using a hot-air oven at a constant temperature of 250 °C in order to add value to plastic waste. Three types of plastics were selected for this study: high-density polyethylene (HDPE), polypropylene (PP), and polyvinyl chloride (PVC). This study employed an experimental research design in which each type of plastic waste was shredded into small pieces, then melted and molded into plant pots using a mold under a constant temperature of 250 °C with varying heating times. Changes in weight and product quality were recorded. The results revealed that HDPE exhibited the most suitable forming performance at a heating time of 75 minutes, requiring an average of 569 g per product and producing smooth and homogeneous surfaces. PP showed optimal results at 90 minutes with an average material consumption of 275 g per product and satisfactory product quality. Although PVC could be molded, it generated pungent odors and caused air pollution during processing, making it unsuitable for recycling using a hot-air oven. These findings indicate that the control of plastic type and heating time is a critical factor in the plastic waste recycling process.
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