What are the waterproof fabrics?

What are the waterproof fabrics? At present, there are mainly four kinds of popular waterproof materials, PE, PU, ​​TPU, PTFE. Working principle: 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, thus causing the phenomenon of vapor permeation. When the water vapor condenses into water droplets, the particles become larger, due to the surface tension of the water droplets (the mutual“Pull to contend”), the water molecules will not be able to successfully separate from the water droplets and penetrate to the other side, that is, preventing the penetration of water and making the vapor permeable membrane waterproof. The price of waterproof fabrics The price of waterproof fabrics on the market ranges from a dozen to several hundred yuan per meter. One reason why the price is so different 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. The price of waterproof fabrics of this material is relatively low. Common types of waterproof fabrics include woven bags and shade cloths. Polyester waterproof fabric is characterized by first-class waterproof and windproof effect, but poor breathability. The price of waterproof fabrics of this material is relatively high, and common waterproof fabrics of this type include chemical waterproof protection and wetsuits. How to clean waterproof fabrics Waterproof fabrics are more resistant to dirt. Many people at home like to wear waterproof fabrics in autumn and winter. If they are dirty, add some detergent to the water, soak for 10 minutes, then gently with your hands for a few minutes, and finally rinse 2 times is fine, it is best not to put it in the sun, just dry it in a cool and ventilated place. Waterproof fabric generation process 1. Preparation of the first slurry Take 2 parts by mass of dodecyltrimethylammonium chloride, 30 parts by mass of butanone, 5 parts by mass of 1,6-diisocyanatohexane, 90 parts by mass Polyurethane resin, 40 parts by mass of toluene, 55 parts by mass of water, and 6 parts by mass of N-methylethanolamine, after mixing them in proportion, pass through a 200-mesh nylon mesh, and then let stand for 75 minutes in a vacuum environment. Can. 2. Apply the first slurry on the surface of the basic fabric to form a primer layer, and then dry at 100 ° C for 7 minutes; parts of polyurethane resin, 6 parts by mass of 1,6-diisocyanatohexane, 65 parts by mass of water, 19 parts by mass of butanone, 7 parts by mass of N-methylethanolamine, and 45 parts by mass of toluene. After they are mixed in proportion, they pass through a 200-mesh nylon mesh, and then stand for 75 minutes in a vacuum environment.