Analysis of Lifespan of Plastic Pallets and Containers in Korea Using Probability Density Function (PDF)

Pallets and containers are reused for a long period of time and are circulated and shared among consumers via a pool system. Although attempts have recently been made to convert to an EPR (Extended Producer Responsibility) system in Korea, it is difficult to calculate their mandatory recycling rates because they are treated as the same waste, even though they are clearly different from disposable consumer goods and plastic packaging materials. In this study, we tried to calculate waste generation based on the lifespan of plastic pallets and containers using the probability density function. The life distribution for each material (PE (polyethylene) and PP (polypropylene)) of pallets and containers was derived, and by applying this, the amount of waste generation from 2010 to 2027 was estimated. The Mean Time to Failure among pallets was 9.6 years for PE and 3.2 years for PP, and among containers, was 16.5 years for PE and 12.2 years for PP. Additionally, it was calculated that pallets had a waste generation rate of 67.5% to 75.1% by shipment, and containers 26.9–69.2%. These results can be used to calculate the waste generation rate when calculating the mandatory recycling rate of pallets and containers in the future. However, since pallets and containers are used second-hand, or are exported together with products after being shipped domestically, the amount flowing into recycling companies decreases, so it is considered that supplementation via material balance analysis is necessary to calculate the mandatory recycling rate.