I really like seafood and since I live in Valencia, I can enjoy it anytime and can be totally sure that it is fresh since the city is based next to the seaside. However, back to my home country, we do not have that access to the diversity, quantity and quality of fresh fish. But it has always been a demand, so in recent years a lot of seafood restaurants have been opened and in order to attract clients they deliver fresh fish on a daily basis from all over the world. The logistics process is complicated, that is why I decided to concentrate only on a packaging feature.
Perishable products may be subjected to harsh environmental conditions, such as excessive temperature or humidity, on the way to their destination, thus, packing shipment is essential to keeping the seafood fresh. During shipping, insulation and refrigerants are key to preserving products. With the proper combination of insulation and refrigerants, the product can maintain within specific temperature ranges.
Insulation reduces the transfer of heat through packaging container walls. The most common insulation materials are expanded polystyrene (EPS) foam, rigid polyurethane foam, and reflective materials. Recommended refrigerants are gel coolants and dry ice to keep perishable products cold or frozen. Wet ice has many disadvantages, including weight and special water-resistant packaging requirements, but it may be used if properly prepared to prevent leakage.
The blog of Logistics at MGEPS at UPV 