The principle of waterproof and cold-proof function of PVC plastic-coated cloth

PVC plastic coated cloth has excellent cold and waterproof performance, 100% waterproof tarpaulin. Lightweight, durable, with a lifespan of 6 to 8 years; windproof and waterproof, play the role of cold protection and warmth, this product also has anti-aging, anti-static and other properties; and this product is greatly superior in breaking strength, tear elongation, and tearing strength in traditional tarpaulins. In the state of water vapor, the PVC plastic coated cloth has very small water particles. According to the principle of capillary motion, it can smoothly penetrate into the capillary to the other side, thereby causing the phenomenon of vapor permeability. When the water vapor condenses into water droplets, the particles become larger. Due to the surface tension of the water droplets (the water molecules 'pull and compete with each other'), the water molecules cannot smoothly escape from the water droplets and penetrate to the other side, which is to prevent the The permeation of water occurs, making the vapor-permeable membrane waterproof. A drop of liquid is dropped on a solid surface. Assuming that the surface is ideally flat, the gravity of the droplet is concentrated at one 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. [1] The angle 0 is called the contact angle. When 0=00, the droplet is flat on the solid surface, which is the limit state of the solid surface being wetted by the field; when 0=1800, the droplet is cylindrical, which is an 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. Application of PVC plastic coated cloth: It can be used to cover the piles of open-air warehouses in stations, docks, seaports and airports; it can be used to build temporary granaries and open-air covering of various crops; Warehouse materials; freight tarpaulins for cars, trains, ships, and cargo ships are available. After long-term tests by tarpaulin manufacturers, the quality of PVC plastic-coated cloth is very good.

Nowadays, the adoption of PVC Film in clear pvc film industry is quite common.

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