Membrane filters appeared on the market as early as the 1960s. At that time, membrane filters containing 0.45 micron pore sizes were considered “sterile grade” liquid filters and were successfully used for sterilizing filtration of injections. Because the bubble point value of this membrane is approximately twice that of traditional 0.45 micron “sterilizing grade” membranes. Millipore divided 0.45 by 2 and named it 0.22 micron membrane. This naming is based on people’s common understanding: the bubble point value is inversely proportional to the filter membrane pore size.
The precision of the filter element is generally expressed in microns. The precision of μm refers to the pore size of the filter element; The size of large particles that are allowed to pass through the filter as the solution passes through it. The smaller the pore size, the higher the filtration accuracy. Currently, 0.22um sterilizing filter membrane is mostly used.
0.22um sterilization filter membrane has a fibrillar microporous structure, a porosity of more than 88%, and 1.4 billion particles per square centimeter. There are micropores with a pore size range of 0.1μm-0.5μm. This film is coated on various fabrics and substrates with a special process and can become a new filter material. The membrane has small pore size, uniform distribution and large porosity. It can maintain air While circulating, it can filter all dust particles including small bacteria to achieve purification and ventilation.
It is a 0.22um sterilizing filter membrane material manufacturer that specializes in R&D, production and sales. Our company is different from other manufacturers. Our company can according to the user’s requirements. By optimizing the key technical parameters of speed ratio, pressure ratio, operating temperature and other parameters, online control of air permeability, thickness and void ratio can be achieved based on the ratio and pore-forming medium to meet your different requirements. Interested parties can enter the store for consultation.
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