There is a gap between Chinese medicinal glass bot

2022-09-24
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There is a gap between China's pharmaceutical glass bottles and international neutral glass standards

at the 10th annual meeting held in Frankfurt, Germany, pharmaceutical glass bottle experts put forward 3.3-technical indicators for the main chemical composition, chemical stability and physical properties of borosilicate glass and neutral glass Among them, the chemical composition and physical and chemical properties of 3.3-borosilicate glass are basically the same as those of China's super hard materials and GG17 materials. The main difference is that the control range of linear thermal expansion coefficient is different. The control range of linear thermal expansion coefficient has not been strictly stipulated for these two kinds of glasses in China However, the performance difference between international neutral pharmaceutical glass bottles and China's "neutral" glass is quite obvious. In the future, we should actively develop international neutral glass production, and gradually restrict the use of our original concept of "neutral" glass is becoming the consensus of industry insiders

in China, low borosilicate glass is the so-called "neutral" glass used for many years. 5. Compared with the international neutral glass, the creep testing machine has a great difference in chemical composition The boron content of "neutral" glass in China is low, so the coefficient of linear thermal expansion is large, and the particle water resistance cannot maintain HGB1 grade This is because the "neutral" glass material in China is relatively general, so it is reflected that the water resistance of the inner surface is also poor - the water resistance of the inner surface of international neutral glass can be guaranteed to meet iso4802-h and C1 requirements when doing large tonnage material mechanics experiments, while it is difficult for Chinese "neutral" glass to meet In the international standard ISO "classification of normally mass-produced glass by composition to further improve the success rate of experiments and its test methods", packaging glass has been clearly divided into three types: International neutral glass, borosilicate glass and sodium calcium glass

in this international standard, sodium calcium glass is not indicated for medicinal use, and the international neutral glass is recognized as the preferred glass for medicinal glass bottles in the world. In the domestic pharmaceutical industry, it is also called class a ampoule glass bottle, 5.0 glass or class a material. Here, 5.0 means that its expansion coefficient is not greater than 5.0 ×. Because the water resistance, acid resistance and alkali resistance of this glass are first-class, it can be said to have excellent chemical stability and thermal stability. As a medicinal glass bottle, it has incomparable advantages in ensuring the quality of drugs

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