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Water repellent refers to the deposition of hydrophobic compounds on the surface of the fiber. There are pores on the surface of the fabric, and air and water vapor can pass through. Generally, water droplets (like lotus leaves) will form on the surface of the fabric. It is not really waterproof, but Reduce water absorption by fabrics. The water can be "pushed away" on the surface of the fabric, and the water will still seep into it if it stays for a long time. water proof
Water resistant/water proof refers to waterproof and moisture-permeable fabrics, generally referring to making rubber soles on the bottom of the fabrics, which are divided into coating and lamination. Coating is often referred to as coating, and lamination refers to lamination, that is, compounding a layer of waterproof material. The vast majority of waterproof fabrics use laminated (film) materials, and there are also various forms of treatment such as capsule fibers, compact fabrics, and siliconization, and are usually located in the inner layer of the fabric, which is often called a "waterproof membrane".
The functional distinction between the water repellent and water proof
1. Waterproof products are more durable than water-repellent products, and their physical and chemical properties are more stable;
2. Waterproof products usually will not fail due to washing and long-term use;
3. Waterproof products have a higher water pressure resistance index than water-repellent products, usually at least 3000 mmH2O or more;
4. In specific applications, the main function of water repellent treatment is to reduce the adsorption of water on the fabric, so that water can be "pushed away" on the surface of the fabric; waterproof treatment is a completely impermeable barrier, whether the fabric absorbs water or not, it will keep water out.