The polytetrafluoroethylene bubble point membrane itself has countless interconnected micropores. The pore size is very small (about 0.01~10 microns) and can only pass through water vapor molecules with a particle size of about 0.1nm, while it is not sensitive to any raindrops or water droplets. , because its particle size is too large to pass.
The main feature is to add inorganic fillers to the raw materials, and use the principle of forming micropores at the junction of the inorganic filler particles (1~10 microns) and the plastic film matrix being shaped during the stretching process. The size of these micropores is sub- At the nanoscale, hundreds of millions of micropores can be distributed in an area of 1cm2. These micropores constitute channels that allow gas to pass through, thereby achieving the breathable but impermeable performance of the PTFE bubble point membrane.
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