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¹ Fisheries Resources and Environment Research Division, East Sea Fisheries Research Institute, National Institute of Fisheries Science (NIFS), Gangneung 25435, Korea
² Fisheries Engineering Research Division, National Institute of Fisheries Science (NIFS), Busan 46083, Korea
³ Division of Fisheries Science, Chonnam National University, Yeosu 59626, Korea DOI : 10.4194/1303-2712-v20_2_05 Viewed : 3063 - Downloaded : 4882 This study aims to improve the physical properties of biodegradable fishing nets in the sea after a certain period to reduce ghost fishing and protect the marine ecosystem. The net, made of biodegradable resin, has a low melting point, which makes it difficult to be heat-treated. Furthermore, the performance of the net varies depending on the manufacturer. The physical properties of a series of biodegradable nets from PBS and PBAT resin blend heat-treated for 20 min at 55-75 °C with 5 °C intervals were investigated. No significant difference in the breaking strength of the net was observed from 55 °C to 70 °C, but it was considerable between 75 °C and 55 °C. As the heat treatment temperature increased, the pore size inside the knot decreased, and the binding strength increased. The shape of the biodegradable net became uniform as heat treatment temperature increased. The net heattreated at 75 °C for 20 min was most preferable based on shape, physical properties of the net. In addition, biodegradable nets, which are still in development stage, should be improved in accordance with the needs of fishermen, and must be distributed in the future for the protection of marine environment and life. Keywords : PBS, Biodegradable netting, Ghost fishing, Heat-treatment, Physical properties