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Film-controlled sustained-release preparation is a common release mechanism, and the coating process is the most important content of this type of preparation. The success or failure of coating is influenced by factors such as prescription, process, and environment. In order to deeply understand the impact of prescription process and environment on the final product, it is necessary to conduct research and evaluation based on past experience and single factor experiments.
Let’s embark on a brief overview of the aging process that occurs in film-controlled sustained-release preparations. This article offers a succinct overview of the process, which we’ll delve into together.

According to the Good Manufacturing Practice (GMP) for pharmaceutical production, the air cleanliness level in the GMP cleanroom is determined by the production process. The production environment parameters in the cleanroom for pharmaceutical production, such as temperature, relative humidity, and pressure difference, are generally determined by the production process. Generally, the temperature is 18℃~24℃, and the relative humidity is 45%~65%.
The implementation guidelines of GMP are relatively specific. The temperature and relative humidity in a clean pharmaceutical production plant are based on the principle that operators wearing clean work clothes do not feel uncomfortable.
Well, let’s explore the new GMP cleanroom classification & supervision together!

Freeze-drying technology has been widely applied in various fields, such as medicine, food, and chemical industry. However, there are many characteristics of freeze-drying equipment, including high cost, high energy consumption, and long freeze-drying process.
Therefore, this article begins with the principle and function of freeze-drying, and develops a new type of freeze-drying system – dynamic freeze-drying system, which can reduce energy consumption, improve drying efficiency, and reduce costs.
The performance, structure, function, and application of the system are analyzed in detail, and the equipment composition and actual cases are introduced. Let’s read this article to explore dynamic freeze-drying system together.

The filling process is driven by a servo motor, and the liquid drug pumped out by the piston rod of the plunger pump is connected to the filling needle on the fixed needle holder through a guide tube, and then flows into the medicine bottle through the needle tube.
In general, the filling precision of plunger pumps is relatively stable, but uncertain factors such as increased bubbles and liquid level changes in the liquid bag, long-term fatigue of the hose connecting the filling pump, and the operating speed of the liquid filling machine can lead to inaccurate filling volume of plunger pumps after running for a period of time.
Taking the filling system of penicillin vial in a plunger pump as an example, let’s analyze and explore the influencing factors of filling precision.