Microporous membrane filtration technology plays an irreplaceable role in the pharmaceutical industry, biochemical industry, food and beverage industry, electronic industry and other fields. Microporous membrane filtration technology has the advantages of simple, fast, high efficiency and energy saving. The materials of microporous membrane filter membrane include: mixed cellulose membrane, nylon membrane, polyvinylidene fluoride membrane, polyethersulfone membrane, polyolefin, polyester, inorganic substrate, etc; The pore diameter of various filter membranes can be divided into 0.1um, 0.22um, 0.45um, 0.65um, 1um, etc.

Microporous filter membrane has its unique characteristics, which can be used to separate large particles and substances in liquid or gas. The main characteristics of microporous membrane are as follows: 1. High separation efficiency and fast separation efficiency can also be understood as high work efficiency; 2. The pore size and porosity of the filter membrane are high, up to more than 70%; 3. Compared with ordinary filter media, the thickness of filter membrane is only half or thinner, which is conducive to accelerating the filtration speed, reducing the adsorption of materials and reducing the waste of materials; 4 the microporous filter membrane will not fall off the filter medium during filtration, prevent the medium from falling into the material and causing pollution, and well ensure the purity of the material.

Characteristics of various microporous filter membranes: mixed cellulose membrane is a filter membrane developed earlier. It has good pore forming and strong hydrophilicity. It is widely used in sterilization filtration of drug solution and terminal filtration of food. Nylon membrane filtration has good hydrophilicity, alkali resistance, not easy to be etched and many models. It is often used for the filtration of electronic industry, food and beverage and pharmaceutical liquid. Polyethersulfone membrane has good chemical stability, radiation resistance, heat resistance, fast filtration speed and wide application range. It is a high-grade filter membrane in microporous filter membrane. Polyolefin has good acid-base resistance and chemical stability. At the same time, it is cheap and has a wide range of applications. The thickness of polyester film is very thin, the manufacturing process is more complex, the heavy porosity is high, and the price is relatively high.