A cosmetic freeze dryer is a device that uses low-temperature freezing and vacuum sublimation technology to directly sublime the moisture in cosmetic raw materials from solid (ice) to gaseous state, thereby obtaining highly active and stable dried products. Its core functions revolve around protecting the activity of ingredients, extending shelf life, and improving product quality. The specific functions are as follows:

1、 Core process functions of cosmetic freeze-drying machine

1. Low temperature freeze-drying technology

Pre freezing stage: Quickly cool the cosmetic ingredients to below the eutectic point, allowing the water to freeze completely into ice crystals to avoid large ice crystals damaging cell structure or active ingredients.

Sublimation drying stage: In a vacuum environment, a small amount of heat is provided through a heating plate to directly sublime ice crystals into water vapor, bypassing the liquid stage and maximizing the retention of the activity of thermosensitive components.

Analysis of drying stage: Further increase the temperature, remove residual bound water, ensure that the product moisture content is ≤ 3%, and meet the requirements for long-term stable storage.

2. Precise temperature and pressure control

Temperature control: PID intelligent temperature control system is adopted, which can set the temperature of pre freezing, sublimation, and analysis stages in sections with an accuracy of ± 0.5 ℃, ensuring the freeze-drying process requirements of different components.

Pressure control: Dynamic adjustment of vacuum degree is achieved through vacuum pump and pressure sensor to avoid unstable sublimation rate or product collapse caused by pressure fluctuations.

3. Uniform drying function

Multi layer shelf design: Equipped with multiple adjustable shelves, each layer is independently temperature controlled to ensure that the raw materials are evenly heated during the freeze-drying process, avoiding local overheating or incomplete drying.

Circulating air system: By forcibly circulating air, the temperature and pressure fields inside the vacuum chamber are evenly distributed, improving drying efficiency and shortening production cycles.

2、 Protective function of cosmetic freeze-drying machine products

1. Protection of active ingredients

Low temperature environment (≤ -40 ℃) and vacuum conditions (no oxygen) can inhibit chemical reactions such as oxidation and hydrolysis, protecting the biological activity of easily deactivated components (such as enzymes, peptides, unsaturated fatty acids, etc.).

2. Preservation of Form and Structure

After freeze-drying, the product maintains its original porous structure and has excellent rehydration properties (such as rapid dissolution of freeze-dried powder in water), making it easy for subsequent formulation or direct use.

3. Microbial control

The low-temperature drying process inhibits microbial growth and, combined with a vacuum environment, further reduces the risk of bacterial reproduction, achieving commercial sterility standards without the need for adding large amounts of preservatives.

3、 Operation and safety functions of cosmetic freeze-drying machine

1. Automation control and data recording

PLC+touch screen control system: supports preset process parameters, automatic operation, fault alarm and other functions, reducing manual operation errors.

Data traceability function: Record key parameters such as temperature, pressure, and time during the freeze-drying process, in compliance with GMP (Good Manufacturing Practice) requirements, for easy quality traceability.

2. Safety protection design

Explosion proof vacuum pump: using oil-free vacuum pump or explosion-proof motor to avoid oil contamination of products or the risk of explosion (applicable to raw materials containing organic solvents).

Overload protection: When the temperature, pressure, or current of the equipment exceeds the safe range, it will automatically shut down and sound an alarm to prevent equipment damage or safety accidents.

Door lock safety interlock: The door lock automatically locks during the freeze-drying process to prevent accidental opening of the vacuum chamber due to misoperation.

3. Convenience of cleaning and maintenance

Detachable shelves and inner container: Made of 304 or 316L stainless steel material, corrosion-resistant and easy to disassemble and clean, avoiding cross contamination.

CIP/SIP function (optional): Supports online cleaning (CIP) and online sterilization (SIP) to meet the hygiene standards of cosmetics production.