The foam box has the function of heat preservation. Because of the low heat transfer performance of foam itself, foam contains a lot of air, which greatly hinders the movement of air, and the air plus micropores in foam hinders the circulation of air. It can play the role of heat preservation and heat insulation.
Freezing period of frozen food
1, red meat (including pork, beef, mutton, etc. ) It can be frozen for about a year. The structure of red meat is relatively stable, and the freezing time will be longer, especially beef can be frozen for more than one year.
2. The structure of poultry meat (including chicken, duck, goose, etc.). ) is looser than red meat, and the freezing period is shorter, generally around 10 month.
3. The freezing time of seafood and seafood (including shrimp, fish and soft-shelled turtle) should be shorter. Generally, it is best not to exceed half a year, which will deteriorate.
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