Views: 537 Author: Site Editor Publish Time: 2024-09-11 Origin: Site
Why Pre-freezing is Necessary Before Freeze-drying?
1. To lay the groundwork for the sublimation phase, forming crystals that are conducive to sublimation.
2. To ensure that the product maintains the same shape before and after drying.
Pre-freezing Methods:
1. Pre-freezing Temperature: The pre-freezing temperature should be 10-20°C below the eutectic point of the material.
2. Loading Thickness: The product thickness should not exceed 1 cm.
3. Loading Containers: Containers with a larger specific surface area are preferable.