How is the PVC three-proof tarpaulin waterproof?

The traditional PVC three-proof tarpaulin used as a covering object is mainly made of chemical fiber woven cloth through a layer of film as the base material. The plastic woven cloth is made by casting and laminating on one or both sides. When the production cost, wages and processing costs of the woven cloth rise rapidly, the use cost of the PVC three-proof tarpaulin increases rapidly. This PVC three-proof tarpaulin is widely used to cover objects, carports, temporary building structures on construction sites, membranes or tents for geotechnical engineering. This single-sided or double-sided laminating woven fabric-laminated PVC three-proof tarpaulin has a lower cost and has a wide range of uses, but this PVC three-proof tarpaulin is made of plastic woven fabric as the base material. The production costs, wages, and processing costs of woven fabrics have risen rapidly. The new PVC three-proof tarpaulin has tensile strength in the warp and weft directions, and has tear strength because it is bonded together. It also has waterproof and anti-leakage properties. The PVC three-proof awning made of one-time composite membrane cloth. 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 tube to the other side, thereby causing the phenomenon of vapor permeation. 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. Function. When choosing PVC three-proof tarpaulin, generally the more expensive quality will be slightly better, in fact, not all high prices are good quality. How is the PVC three-proof tarpaulin waterproof? (1) 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 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) ). (2) If the color of the tarpaulin is relatively light, avoid cleaning with some items that are difficult to clean when cleaning, to prevent it from being inconvenient for us to clean after dyeing, and destroying the aesthetic effect of the PVC three-proof tarpaulin. (3) If there is a white side, we can also apply some toothpaste on its surface to prevent the tarpaulin from discoloring. (4) Except that the ground is completely leveled at night, when the droplet is in equilibrium on the solid surface, point A receives the action of decentralization. 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 a kind of Ideal non-wetting behavior. (5) In the water-repellent finishing, the surface tension of the droplet can be regarded 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. (6) We should also pay attention that the force should be appropriate when cleaning, and it should be gentle and even. Do not use a brush to brush with brute force, which will easily damage the canvas line and its color. A very important criterion for the quality of PVC three-proof tarpaulin is the density of latitude and longitude. The higher the density, the better the strength, that is, the better the quality. Just look at the appearance, the rougher the surface, the lower the quality, so if you take a piece of PVC three-proof tarpaulin, first look at the roughness, and then you can test the softness with your hands. In the introduction of the main material of the cloth, the material is explained in detail, and it is a very reference method to see the quality from the material. After reading the above content, you must have a corresponding understanding of how to choose the PVC three-proof tarpaulin. When purchasing, the PVC three-proof tarpaulin can also be checked with water to see if it will leak, so that you can tell the difference. The quality of PVC three-proof tarpaulin is gone. In addition, the front of the tarpaulin is spread out flat, leaving two side ropes, and the two sides in the length direction are folded to the longitudinal center line of the tarpaulin. Divide the folded sides into thirds and fold them twice towards the center line. Fold both sides of the tarpaulin in the width direction to the horizontal center line of the tarpaulin, and then fold them in half three times in a row to the middle, and then jump firmly. Bundle with reserved rope, tie crosses on both sides, tighten and tie tightly, and plug the rope end well.
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