With the advancement and maturity of production technology, many membrane filtration processes have been greatly improved. Among them, Teflon liquid filtration membrane is a widely used filter material in recent years. It is now widely used applied to actual large-scale production.
There are two main methods for preparing Teflon liquid filtration membranes that have been reported so far.
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 microporous film made by this method has the smallest pore size. is 0.1μm.
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.
Teflon liquid filtration membrane is generally made of polytetrafluoroethylene (ptfe) suspended powder, which is expanded and stretched to form a microporous film.
PTFE liquid filtration membrane has a fibrillar microporous structure with a porosity of more than 88%, 1.4 billion micropores per square centimeter, and a pore size range of 0.1μm-0.5μm. This membrane is coated on various surfaces using a special process. On fabrics and substrates, it can become a new type of filter material. The membrane has small pore size, uniform distribution, and large porosity. It can filter all dust particles including bacteria while maintaining air circulation.
Suzhou New Material Technology Co., Ltd. is a fluorine material film manufacturer that integrates the research, development, production and sales of PTFE air filtration membranes, PTFE bubble point membranes, PTFE membranes, Teflon membranes and coated filter materials.
The company has advanced PTFE film production lines, lamination and composite production lines, which are at the domestic advanced level.