As far as we know, there are many drying methods, such […]
As far as we know, there are many drying methods, such as sunlight drying, boiling, oven drying, spray drying, and vacuum drying, but ordinary drying methods are usually performed at temperatures above 0 ° C. The dried product will shrink in size and harden the texture. Most of the volatile components will be lost, some heat-sensitive substances will be denatured and inactivated, and some substances may even be oxidized. Therefore, compared to before drying, the properties of Freeze Drying product are very different. The Freeze Dry method is basically performed below 0 ° C, that is, the product is frozen, and the temperature is above 0 ° C only when the residual moisture of the product is reduced in the later stage. Not more than 40 ° C. Under vacuum conditions, when water vapor directly sublimes, the drug remains in the frozen ice shelf, forming a sponge-like porous structure, so the volume after drying is almost constant. Before it is used again, it will dissolve as soon as water for injection is added. GF Freeze Dry Machine has some advantages over other machines.
1. Many heat-sensitive substances do not denature or inactivate.
2. When drying at low temperature, some volatile components in the material will be lost.
3. During the freeze-drying process, the growth of microorganisms and the role of enzymes cannot function, so they can maintain their original properties.
4. Because it is dried in a frozen state, its volume is almost constant, it has the original structure, and no concentration occurs.
5. Since the water in the material after the pre-freezing exists in the form of ice crystals, the inorganic salt-soluble substances originally dissolved in water are evenly distributed in the material. During the sublimation process, the substances dissolved in water are precipitated, which avoids the phenomenon that the inorganic salts carried by the internal moisture migration to the surface in the general drying method precipitate on the surface and cause surface hardening.
Please GuanFeng Machine for purchasing high quality Freeze Dry Machine, we would like to establish long term relationship with you.