The improvement of glass packaging for the most gu

The improvement of pharmaceutical glass packaging cannot be separated from neutral glass

at the 10th annual conference held in Frankfurt, Germany, the glass experts proposed 3. The main chemical composition, chemical stability and physical properties of 3-borosilicate glass and neutral glass. Among them, 3. The chemical composition and physical and chemical properties of 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 is becoming the consensus of industry insiders

in China, low borosilicate glass is the so-called "neutral" glass used for many years. 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 coefficient of linear thermal expansion 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 that it meets the requirements of ISO4802-HC1, while in areas with sufficient natural gas, 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, while international neutral glass is recognized as the preferred glass for drug packaging materials in the world, and it is also called class a ampoule glass, 5 in the domestic pharmaceutical industry. 0 glass or grade a material, 5 here. 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 all at the first level, it can be said that it has excellent chemical stability and thermal stability. As a drug packaging material, it has incomparable advantages in ensuring the quality of drugs, In April 2021, China Chengdu Construction talked with you about new opportunities in the industry through the market environment capacity trading Expo

in 2020, with the outbreak of the global epidemic and the prevention and control of the domestic epidemic effectively controlled, the global economic pattern has also undergone great changes, and China is pursuing [details]