How to waterproof tarpaulin

Tarpaulins are often seen in daily life. So, how do waterproof tarpaulins waterproof? In the state of water vapor, the water particles are very small. According to the principle of capillary motion, they can smoothly penetrate into the capillary to the other side, Thereby, the phenomenon of permeation occurs. When the water vapor condenses into water droplets, the particles become larger, and due to the surface tension of the water droplets, the water molecules cannot smoothly escape from the water droplets and penetrate to the other side. The function of . A drop of liquid drops on a solid surface, assuming that the surface is ideally flat, the gravity of the droplet is concentrated at a point, and the amount of the field is ignored. As a result of the interaction of the surface tension (Ys) of the fibers in the fabric, the surface tension of the liquid (YL), and the interfacial tension (YLS) of the fasteners, the droplets can take a variety of shapes (from cylindrical to fully flattened) ). In addition to the complete flattening of the night, when the droplet is in equilibrium on the solid surface, the point A receives the action of decentralization. The angle 0 is called the contact angle. When 0u003d00, the droplet is flat on the solid surface, which is the limit state of the solid surface being wetted by the field; when 0u003d1800, the droplet is cylindrical, which is a kind of Ideal non-wetting behavior. In water repellent finishing, the surface tension of the droplets can be considered as a constant. Therefore, whether the field can wet the solid surface, go to the relay tension of the late lotus leaf in the bank with the solid surface. According to the said requirements, the larger the contact angle 0, the more conducive to the rolling loss of water droplets, that is to say, the smaller the better. The above is the main content of how to waterproof tarpaulin.

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