The printing and dyeing industry is a large water consumer. Wastewater discharge and total pollutant volume rank second and fourth among the national industrial sectors respectively. It is one of the key polluting industries in my country. For this reason, how to solve the problem of sewage discharge has attracted much attention, and many environmentally friendly filter materials have also appeared in people’s field of vision, including polytetrafluoroethylene bubble point membrane.
When the pressure is greater than the bubble point, the gas flow can quickly pass through the filter pores; when the pressure is less than the bubble point pressure, in fact, there is a very small gas flow between the liquid in the filter membrane pores. To spread. This gas flow is caused by the pressure difference or pressure gradient on both sides of the filter membrane, that is, the membrane pressure difference causes the gas concentration difference across the membrane.
There are two main methods for preparing polytetrafluoroethylene bubble point membrane. One is to add the pore-forming agent NaCl to PTFE, then make the PTFE into a film, and then remove the NaCl by heating and washing with water. The vacancies left by the NaCl form pores. The minimum pore size of the microporous film made by this method is 0.1 μm. . The second is the mechanical stretching method. The microporous film made by the modified method has a special structure of island-like “knots” connected by microfibers. It is currently the main method for preparing PTFE microporous films.
PTFE film manufacturer specializes in the production of polytetrafluoroethylene bubble point film. It has a full set of advanced production equipment and technology, and also has an advanced clean room and an independent composite slitting workshop. , ensuring the production quality of PTFE membrane; the product materials produced are all imported raw materials, with high uniformity, stable performance, good air permeability, and the filtration efficiency can reach 99.999995%! It can basically meet the filtration efficiency grade requirements of sub-high efficiency, high efficiency and ultra high efficiency filters. Interested parties can enter the store for consultation and purchase!
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