PTFE is considered a good hydrophobic membrane material due to its excellent corrosion resistance, thermal stability and hydrophobicity. However, it is difficult to dissolve and has poor melt fluidity. , difficult to process. At present, the processing method of ptfe hollow fiber membrane is mechanical stretching method, but the porosity of the membrane prepared by this method is low, which seriously restricts the efficiency of the separation process.
During the continuous and normal operation of the hollow fiber ultrafiltration membrane, various cleaning methods need to be carried out regularly. At present, the commonly used cleaning methods mainly include the following: back pressure backwashing method, isobaric hydraulic washing method, and chemical cleaning method.
The pore-forming mechanism ofptfe hollow fiber membrane: under the action of extrusion, shearing, stretching, etc., the PTFE resin particles Entanglement, and initial fibrillation; further stretching can cause the microfibers in it to elongate, and then form a “fibril-node” microporous structure. Therefore, during product processing, extrusion, shearing, stretching and other effects are very important to the formation of microporous structure.
The pore size of this film is small and uniform, the micropore structure is stable, the porosity can reach 80%~90%, and the filtration accuracy can reach U15 or above, or even U17 class. The surface filtration efficiency reaches 99.9%~99.999%. For some very small particles with a diameter of 0.1um-0.3um, it can well prevent fine dust from entering the filter material. It can operate at a continuous operating temperature of 240°C and an instantaneous temperature of 260°C.
It is a ptfe hollow fiber membrane manufacturer that specializes in R&D, production and sales. The materials of the products produced by our company are all imported raw materials, with high uniformity, stable performance and good breathability. It also has high filtration efficiency and can meet the filtration efficiency level requirements of sub-different levels of filters. Interested parties can enter the store for consultation and purchase!