What is the material of the folded filter element?

PP polypropylene, as a pre-filter material with only relative accuracy, can only intercept larger colloids and particles. Its function is to prevent large particles from clogging the terminal filter membrane and protect the subsequent terminal filtration. effect. However, it has strong adsorption performance and a large amount of dirt, which cannot be achieved by pes and ptfe. (As a material with relative precision, its pore size is generally of little significance and does not need to be entangled. ptfe polytetrafluoroethylene, generally it can be divided into hydrophilic ptfe and hydrophobic ptfe, hydrophilic filtration liquid, hydrophobic filtration gas, According to the casting process, it can be divided into casting film and continuous casting mold. Due to the unique four f atoms surrounding carbon structure of PTFE, this material has strong chemical stability, strong acid resistance, strong alkali resistance and organic resistance. Solvent. The ptfe material itself is hydrophobic, and the hydrophilic ptfe is treated, so the liquid flux of the hydrophilic ptfe membrane is relatively poor. ptfe is a high-precision filter membrane, which can be used to sterilize the terminal liquid , and gas sterilization. pes polyethersulfone, the more commonly used terminal sterilization filter element material, has good hydrophilicity and low protein adsorption, which brings it the characteristics of high flow rate and long life, the same accuracy Generally, under the pressure of 200mbar (0.2kg), the liquid flux per unit length and unit time can reach 2 times that of ptfe. The precision of the sterilizing filter element is generally 0.22m and 0.45m.

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