Knowledge characteristics of raincoat fabrics, raincoats are made of waterproof fabrics, such as tape, linoleum, plastic film, including the latest polytetrafluoroethylene (PTFE) waterproof and breathable laminate fabrics. The principle of raincoat waterproofing. There are more and more materials and styles of modern raincoats, but no matter how you change them, raincoats have a property that has never changed, that is, the raindrops on the top will quickly gather into a small drop of water and then flow away. It is the reason why the raincoat is waterproof.
Rain falling on the surface of the raincoat is a phenomenon of non-wetting, because the attraction of rubber molecules to water molecules is far less than the attraction between water molecules, and water molecules prefer to gather together and roll down the surface of the raincoat. At the same time, the fabric of the raincoat still has many small holes, but because rain does not soak the rubber, it is difficult for water molecules to pass through the raincoat fabric through these small holes, and these small holes can not play a role in the organization of the air molecules, which ensures that The breathability of the raincoat.