Pure water is indispensable in the daily actual operation of the laboratory, whether it is to clean the experimental utensils or to prepare the experimental reagents commonly used in experiments. Under normal circumstances, the pure water obtained by the laboratory pure water mechanism is used immediately by everyone, so that in addition to the convenience of opening, it also minimizes the harm of the pure water from external factors. Although it is not a good idea to store ultrapure water, when the need is large, or before the water is further filtered, it is very likely that pure water must be stored. Nowadays, most laboratory water purifiers use storage materials. The tank method stores the pure water produced. Because the ultrapure water system is a good organic solvent, most of the water storage tanks are made of plastic raw materials.
Generally, when buying a laboratory water purifier, some people rarely pay attention to the material problems of the water storage tank. Although the pure water storage tank is made of plastic raw materials, do you know which raw material is stronger? ? At present, the key raw materials for pure water storage tanks on the market are high-pressure polyethylene and polypropylene, and everyone suggests that everyone should use pure water storage tanks made of high-pressure polyethylene. Why don't we propose to use polypropylene water storage tanks? There are two main factors:
1. Stability
Everyone has been paying attention to the laboratory water purifier to reduce the external harm to the pure water as much as possible after the pure water is produced. The two raw materials, high-pressure polyethylene and polypropylene, high-pressure polyethylene are more reliable and relatively The dissolution hazard to pure water is lower than that of polypropylene. The hydroxyl groups of polypropylene are relatively easy to fall off. Although this kind of probability is relatively small, it is necessary to avoid this kind of probability as far as possible for severe tests.
2. Anti-aging
From the usual laboratory water purifier applications, everyone finds that the pure water storage tank made of polypropylene is not as durable as high-pressure polyethylene materials, especially when polypropylene is more prone to air oxidation and dissolution under ultraviolet light and energy efficiency. And in order to better improve the impact resistance of polypropylene, impact-resistant modified materials must be added during the molding of polypropylene, which increases the risk of pure water being harmed by external factors.
