Ultrafiltration membrane (UF) is one of the polymer membranes with an early development, and its pore size range is 0.0 1 ~ 0. 1um. Pure physical filtration is adopted, that is, when the solution passes through the semi-permeable membrane, under the action of pressure, the small molecular substances in the solvent and solute can reach the other side of the membrane through the filter membrane, while the large molecular substances and colloids in the solute can not pass through the pores of the filter membrane and are intercepted. With the continuous flow of the solution, more and more substances are trapped on the membrane. Therefore, in order to realize ultrafiltration, it is necessary to exert great pressure on the solvent, and the substances formed on the membrane surface show certain chemical characteristics, which can intercept and decompose some pollutants, thus realizing water purification.
Among many central water purifiers, Li Sheng adopts PVC alloy capillary ultrafiltration membrane, and its filtration pore size reaches 0.0 1 micron, which is one ten thousandth of that of hair. It can effectively separate large-particle impurities and harmful impurities from tap water, while retaining natural minerals and trace elements beneficial to human body in raw water. Moreover, during daily dishcloth washing and cleaning, the valve can be conveniently opened to clean the filter element, so that water resources are not wasted, and dirt trapped in the ultrafiltration membrane can be washed away, thus prolonging the service life of the filter element and reducing the frequency of replacing the filter element. The product structure design of one inlet and two outlets makes purified water and straight water have their own independent channels, which avoids the secondary pollution of purified water. In this way, the filter element is not dirty and blocked, and the water output is large, and the domestic water can always be kept clean, which is beneficial to pregnant women, babies and the elderly, and is really suitable for people to drink for a long time.