language selection
Compared with common glass, borosilicate glass has no toxic and side effects. Its mechanical properties, thermal stability, water resistance, alkali resistance, and acid resistance are greatly improved. It can be widely used in chemical, aerospace, military, family, hospital and other fields , Can be made into lamps, tableware, dials, telescope lenses, washing machine observation holes, microwave oven trays, solar water heaters and other products, with good promotion value and social benefits, t... More
Heat-resistant glass withstands rapid cold and heat, which indicates that the thermal expansion coefficient (ratio of glass expansion due to temperature increase) is relatively small and it is not easy to break in rapid temperature changes. It has a series of excellent properties such as low expansion, thermal shock resistance, high temperature resistance, corrosion resistance and high strength. The high borosilicate heat-resistant glass material has a high safety factor, and will never have a s... More
High borosilicate 3.3 glass is high temperature resistant glass, heat resistant glass and temperature difference resistant glass. The coefficient of linear expansion is 3.3 ± 0.1 × 10-6 / K. It is a glass based on sodium oxide (Na2O), boron oxide (B2O2), and silicon dioxide (SIO2). The glass composition has a high content of borosilicate, which is boron: 12.5 ~ 13.5% and silicon: 78 ~ 80%, so this kind of glass is called high borosilicate glass. Mechanical properties Compared with ordinary glass... More
China's high borosilicate glass production technology has a large gap with foreign developed countries. In 1952, domestic crucible furnaces were used to form small-sized high-borosilicate glass chemical equipment by hand. In 1958, a full set of technical equipment was introduced from Germany, and glass-cell furnaces were used to continuously produce high-borosilicate-glass products. The large-scale production of high-borosilicate glass pipes has been introduced in France; since 1980, high-borosi... More
In order to implement the Opinions of the State Council on Reforming the System for the Review and Approval of Drugs and Medical Devices (Guo Fa [2015] No. 44), to simplify the procedures for drug approval, direct contact will be made with packaging materials and containers for drugs (hereinafter referred to as drug packaging materials), drugs The use of excipients has been changed from independent examination to review and approval together when examining drug registration applications. The rel... More
