Principle of ptfe waterproof and breathable membrane
PTFE waterproof and breathable membrane is mainly a microporous membrane made of polytetrafluoroethylene as raw material, using special technology, calendering, extrusion, biaxial stretching and other methods.
The pore size of this membrane ranges from 0.02um to 0.2um, and the porosity reaches more than 88%.
The working principle of ptfe waterproof and breathable membrane is: in the state of water vapor, water particles are very small, and these water particles can penetrate along the capillary tube to the other side, causing vapor permeability.
If water vapor condenses into water droplets, the particles will become larger. In addition, the surface tension of the water droplets will act, and the water molecules will not be able to smoothly leave the water droplets, penetrate and reach the other side. In other words, this process This can prevent water penetration, allowing the waterproof and breathable membrane to truly have a waterproof function.
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