NEWS / CHANGSHENG

It is reported that foreign personnel are developing new types of glass through the following two channels. Firstly, the material itself is changed by changing the content of a certain component in the glass. The AsolvexI type glass recently created by Saint Gobain was obtained by reducing the Al2O3 content in the glass bottle. Secondly, a thin coating with auxiliary properties is applied to the glass surface to improve its surface functional characteristics. In recent years, with the increasingly fierce competition in the packaging material market, the requirements of the industry for glass products are also increasing. It is a general trend to improve the Glass production process and develop new types of glass.
Asolvex glass is a new type of I-glass. Type I glass is borosilicate glass with chemical resistance. The content of Al2O3 in the Asolvex glass composition is reduced by 50% compared to ordinary Type I glass, while the silicon content correspondingly increases, which greatly reduces the precipitation of Al2O3. Under normal non ionized water conditions, the precipitation rate of Al2O3 in sodium Gluconic acid solution is even reduced by 75% (the precipitation rate of Al2O3 corresponds to that of 20 ml injection bottle kept at 125 ℃ for 25 minutes).
The significant reduction in Al2O3 precipitation provides the possibility of obtaining new packaging materials, as this characteristic is applicable to products sensitive to trace metal elements, such as enzymes or products without preservatives and moderators. The application potential of this material is enormous, especially for blood products, nutrition products, biological agents, and genetic engineering drugs.
In addition, glass can be coated with any material, such as metal, semiconductor, polymer, etc. Applying a thin coating with a thickness ranging from 1 micrometer to 1 micrometer is a relatively simple and inexpensive method that can effectively change the surface properties of glass, especially its crack resistance and moisture resistance.
Although the crack resistance of glass is relatively low, its internal fiber strength is very high. The reason why glass is fragile when dropped is due to the presence of very small (less than 1 micrometer) defects on its surface, and the fracture extends from these small defects. Defects cannot be completely avoided in production, but they can be reduced or partially reduced. This can be achieved by treating the surface of the glass and applying a very thin layer of silicon containing organic compound solution. Therefore, silicon molecules similar to glass can react with glass to form a solid network, which becomes a solid coating that adheres to the surface of the glass and effectively fills surface cracks.
Relevant tests have shown that after treatment with silicon containing organic compounds, the crack resistance of these glass bottles has increased by 1.5 to 2 times. Existing research will further improve these treatment effects, and humans are expected to produce almost unbreakable glass bottles in the future.
Some performance advantages of the glass surface endow it with hydrophilic properties, which should be avoided in certain situations. In the field of medicine, avoiding its hydrophilic properties can make it easy for people to empty all the drugs in glass bottles. Saint Gobain has launched a research program aimed at addressing this issue. The hydrophobic molecules with many C-F Chemical bond are coated in a single layer (the thickness is the molecular diameter), and the glass surface is treated to make the water wetting angle reach 120 °. Relevant personnel