To put it simply, the working principle of PTFE composite materials is: in the state of water vapor, the water particles are very small, and these water particles can penetrate along the capillary to the other side, causing vapor permeability.
If water vapor condenses and turns 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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