What are the waterproof fabrics? Currently there are four kinds of waterproof materials, PE, PU, ​​TPU, PTFE. Working principle: In the state of water vapor, the water particles are very fine. According to the principle of capillary motion, they can penetrate the capillary tube to the other side smoothly, so that the phenomenon of vapor transmission occurs. When water vapour condenses into water droplets, the particles become larger. Due to the surface tension of the water droplets (water molecules “pull and pull†against each other), the water molecules cannot smoothly separate from the water droplets and penetrate to the other side. Water infiltration occurs and the vapor-permeable membrane has a waterproof function.
Waterproof fabric price
The price of waterproof fabrics in the market ranges from a few dozen meters per meter to several hundred. One reason why prices are so great is that the materials used to make waterproof fabrics are different. There are two common waterproof fabrics: nylon waterproof fabric and polyester waterproof fabric. Nylon waterproof fabric has good air permeability, but the windproof effect is poor. Water-repellent fabrics of this type have a low price, and the common type of waterproof fabrics are woven bags and shade cloths. Polyester waterproof fabrics are characterized by waterproof and windproof effects are first-class, but the permeability is poor. Water-repellent fabrics of this type have a relatively high price, and common types of waterproof fabrics are waterproof protection and diving suits for chemicals.
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