Foam packaging boxes are very useful, and the effect of the cold chain is obvious.

Ordering vegetables and fruits online is nothing new. Many people have experienced this new model. However, people still feel uncomfortable buying seafood and raw meat online. If frozen shrimp are delivered in a foam box, will they be damaged in 3 days?

Foam boxes are useful, and the effective cold chain is showing results.

Foam boxes are useful, and the effective cold chain is showing results.

Many people, when they first see a foam box, first think that it can be used for insulation. At this time, I remembered the northern warm house project. Some people also think that the foam box is very thin, and the meat will not spoil. In fact, we all underestimate the role of foam boxes in cold chain transportation, but its application range is wide and its usage frequency is high.

Whether a foam box can keep food fresh depends on whether the foam box is thick enough. Generally speaking, a foam box with a thickness of 3 centimeters has a good cooling effect. I remembered buying ice cream on the street when I was a child. The ice cream lady didn't go back and forth to the refrigerator, but she sold it using a foam box, which is the principle.

Will meat and seafood be packaged in foam boxes? No, we need ice to keep them cold. Ice cubes are good because they melt slowly and can maintain the temperature in the box for a long time.

Four methods of cold chain transportation

Overall, cold chain transportation can be divided into three types: sea, land, and air, but land cold chain transportation can also be further divided into road and rail. They each have their own advantages and disadvantages, and are frequently used in practice.

Road transport is flexible and changeable. It can reach many areas. It can go to places where trains and planes cannot reach. Moreover, it is less affected by weather factors and is inexpensive. It can achieve low-threshold "door-to-door" service. Therefore, this is also the main method of cold chain transportation in our country. However, the disadvantages are obvious: it is slow and has low timeliness. If the function of the vehicle's cold chain equipment is not powerful enough, it will often cause losses.

Rail transport will be faster than road transport, and the transport volume is relatively large, and it is almost unaffected by the weather. The transportation cost is low, and the risk is smaller than sea transport. The disadvantage is that it costs too much money in the early stage. After all, trains are not cars.

Water cold chain transportation is to travel rivers and seas. Ships can transport large cargoes, have a large carrying capacity, are inexpensive, and have good accessibility. The disadvantage is that it cannot reach inland areas and can only transport along the coast. Moreover, there are many risks at sea, and it is not very safe.

Air transport is the use of airplanes to transport fresh products. It is fast, efficient, and safe. One disadvantage is that it is expensive, and the second is that there are few cities that can deliver goods. There are requirements on the spot, and there must be multiple flights. Third, it is easily affected by weather factors such as heavy fog and heavy snow. Moreover, the traffic volume is not as large as that of ships and trains. It is suitable for cold chain transportation in emergencies such as medicines and valuables.