I want to discuss why some materials are both windproof, breathable and rainproof!

Windproof means that the holes can be very small. In addition, there should be a filling layer inside the surface of the clothes to prevent rain, and the pores should be micropores, which are much smaller than raindrops. There is a special website for downloading the US patent: the searched patent number can be directly added to the following website: the micropore size is only a few μ, water droplets cannot pass through it, and gas molecules can pass through kijuy (in-station contact TA) PTFE microporous material double 1 1 (in-station contact TA). It seems that there are similar fluorine materials in Zhejiang. Mountainyao (in-station contact TA) seems to produce PTFE and others. Dashing ta)Gore-tex fabric features: waterproof: the unique structure of the fabric is composed of two different substances, one is e-PTFE membrane, which has waterproof function. There are 9 billion holes in a square inch of GORE-TEX film. And a drop of water is 20 thousand times larger than these holes, so water can't pass through. It can still resist rain (snow) in stormy weather, and 100% is absolutely waterproof. Permeability: each micropore is 700 times larger than the sweat molecules of human body, and sweat can easily pass through the cloth. Windproof: Because of the irregular arrangement of 9 billion holes per square inch, GORE—TEX can block the invasion of cold air. In fact, waterproof and breathable is realized by the pressure difference of water vapor partial pressure on both sides of the film. To put it bluntly, when the partial pressure of water vapor in the external environment is greater than that in the internal environment, even if people don't sweat, they will feel wet, because the water outside has come back recently, and theoretically, the more advanced materials (that is, good air permeability), the more problems there are. The theoretical basis is that Goer's technicians admit that no material can be waterproof and breathable in one direction.