1、 Freeze drying is carried out at low temperatures, making it particularly suitable for many heat sensitive substances Proteins, microorganisms, and the like will not undergo denaturation or lose their biological vitality Therefore, it has been widely used in medicine

2、 When dried at low temperatures, the loss of some volatile components in the substance is minimal, making it suitable for drying some chemical products, drugs, and food

3、 During the freeze-drying process, the growth of microorganisms and the action of enzymes cannot be carried out, so the original properties can be maintained

4、 Due to drying in a frozen state, the volume remains almost unchanged, maintaining the original structure and preventing concentration

5、 After drying, the substance is loose and porous, appearing sponge like. It dissolves quickly after adding water and almost immediately returns to its original shape

6、 Due to the drying process being carried out under vacuum with very little oxygen, some easily oxidizable substances are protected

7、 Drying can remove more than 95-99% of moisture, allowing the dried product to be stored for a long time without deterioration

Therefore, freeze-drying is currently widely used in the pharmaceutical industry, food industry, scientific research, and other sectors