PTFE biaxially stretched membrane is a polymer compound polymerized from tetrafluoroethylene. It is prepared through a biaxial stretching process. It has a microporous structure with staggered fibers. It has high porosity and small and uniform pore size.
There are two main methods for preparing PTFE microporous films 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.
The ptfe biaxially oriented film produced is made of dry ptfe fine powder and additives, which are fully mixed before entering the extruder. The powder is pushed and extruded into strips of ptfe, and then rolled under a rolling machine to form a film. The film can be stretched vertically and horizontally after heating to volatilize the additives, and then through heat treatment, shaping, cutting and rolling to obtain a biaxially stretched microfiltration membrane.
The ptfe biaxially oriented film produced by Suzhou ptfe microporous membrane manufacturer uses imported raw materials. We have a full set of advanced production equipment and use advanced production equipment to ensure the production quality of the membrane materials; we use production and testing instruments imported from the United States. , testing the quality of membrane materials, and passing international SGS testing and certification, as well as ISI testing and certification.
We have also strategically cooperated with Zhejiang University to introduce a large number of polymer professionals and have a group of professional polymer R&D teams focusing on the research and development of PTFE polymer technology. We have strong R&D capabilities and have a number of invention and practical patent certificates.
</p
