The hottest neutral glass promotes the innovation

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Neutral glass promotes the innovation of pharmaceutical glass packaging

our glass experts have proposed 3.3-technical indicators of 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. The performance difference between international neutral glass 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, which is becoming the consensus of the industry

in China, low borosilicate glass is the so-called neutral glass that has been used for many years. In this way, the fixture must be installed in the high and low temperature box. Compared with the international neutral glass, the chemical composition of the two is very different. The boron content of neutral glass in China is low, so the linear thermal expansion coefficient is large, and the particle water resistance cannot maintain HGB1 level. This is because China's neutral glass material 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 ensure to meet the requirements of ISO4802-HC1, while China's neutral glass is difficult to achieve. In the international standard ISO "classification and test methods of normally mass-produced glass by composition", 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 drug packaging materials in the world. In the domestic pharmaceutical industry, it is also called class a ampoule glass, 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 kind of glass are first-class, it can be said to have excellent chemical stability and thermal stability. The functional characteristics of microcomputer controlled cement pressure testing machine: as a drug packaging material, it has incomparable advantages in ensuring the quality of drugs

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